/* ============================================================
   顾问课堂 · 在线课程站 共享设计系统
   延续单品网站「浅玻璃橙拟态」视觉：米白底 + 橙色光斑 + 玻璃卡片 + 橙色渐变按钮
   配色：橙绿黑白 ｜ 字体：免费系统字体 ｜ 响应式断点：960 / 640
   ============================================================ */

:root{
  --ink:#241f1a; --text:#4a423a; --text2:#6a5f55; --gray:#8b8178;
  --org:#f4511b; --org2:#ff8a4d; --org3:#ffcdab; --orgl:#fff1e6;
  --grn:#2f9e5f; --grn2:#57c98c; --grnl:#eaf7f0;
  --glass:rgba(255,255,255,.62); --glass-border:rgba(255,255,255,.85);
  --shadow:0 10px 36px rgba(120,60,10,.12);
  --btn:linear-gradient(135deg,#f4511b,#ff6e2b); --btn-h:linear-gradient(135deg,#ff5a24,#ff8a4d);
  --dark:linear-gradient(150deg,#241f1a,#3a2c20);
  --r:22px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  background:#fbf4ea;color:var(--ink);line-height:1.85;font-size:15px;
  background-image:
    radial-gradient(circle at 14% 18%,rgba(255,173,94,.20) 0,transparent 42%),
    radial-gradient(circle at 86% 12%,rgba(244,81,27,.13) 0,transparent 38%),
    radial-gradient(circle at 72% 86%,rgba(255,205,171,.32) 0,transparent 44%),
    radial-gradient(circle at 22% 92%,rgba(255,138,77,.13) 0,transparent 40%);
  background-attachment:fixed;background-repeat:no-repeat;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 28px}
a{color:var(--org);text-decoration:none}
a:hover{color:var(--org2)}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--org);outline-offset:2px;border-radius:6px}
::selection{background:rgba(244,81,27,.18)}
svg{display:block}

/* ---------- 导航 ---------- */
nav{position:sticky;top:0;z-index:60;background:rgba(248,241,231,.62);backdrop-filter:blur(22px) saturate(160%);-webkit-backdrop-filter:blur(22px) saturate(160%);border-bottom:1px solid rgba(255,255,255,.6);box-shadow:0 10px 34px rgba(150,80,20,.08)}
.nav{display:flex;align-items:center;gap:26px;padding:14px 28px;max-width:1080px;margin:0 auto}
.brand{font-weight:800;font-size:15px;letter-spacing:1px;color:var(--ink);white-space:nowrap}
.brand span{color:var(--org)}
.nav a{color:var(--text2);font-size:13.5px}
.nav a:hover{color:var(--org)}
.nav a.on{color:var(--org);font-weight:700}
.nav .cta{margin-left:auto;background:var(--btn);color:#fff;padding:9px 22px;border-radius:999px;font-weight:700;font-size:13px;box-shadow:0 8px 22px rgba(244,81,27,.32),inset 0 1px 0 rgba(255,255,255,.35);border:1px solid rgba(255,150,90,.45)}
.nav .cta:hover{background:var(--btn-h);color:#fff;transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links .btn.cta{margin-left:0}
.burger{display:none;cursor:pointer;width:42px;height:42px;border:none;background:rgba(244,81,27,.08);border:1px solid rgba(244,81,27,.35);border-radius:12px;position:relative;margin-left:auto;flex:0 0 42px}
.burger span{display:block;width:20px;height:2px;background:var(--org);position:absolute;left:10px;transition:all .25s}
.burger span:nth-child(1){top:13px}.burger span:nth-child(2){top:20px}.burger span:nth-child(3){top:27px}
.xn{position:fixed;top:14px;right:18px;z-index:80;display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:none;background:var(--btn);color:#fff;font-size:20px;cursor:pointer;box-shadow:0 8px 22px rgba(244,81,27,.35)}
@media(max-width:960px){
  .nav{flex-wrap:nowrap;gap:10px;padding:12px 16px}
  .burger{display:block}
  .nav-links{position:fixed;top:0;right:-320px;width:300px;height:100vh;background:rgba(251,244,234,.97);backdrop-filter:blur(24px);flex-direction:column;align-items:flex-start;gap:0;padding:76px 28px 30px;box-shadow:-18px 0 50px rgba(60,30,0,.16);transition:right .3s ease;z-index:70;border-left:1px solid rgba(255,255,255,.8)}
  .nav-links.open{right:0}
  .nav-links a{font-size:16px;padding:15px 0;width:100%;border-bottom:1px solid rgba(244,81,27,.12);color:var(--text)}
  .nav-links a.btn.cta{margin-left:0;margin-top:20px;text-align:center;width:100%;border:none}
}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;border:none;cursor:pointer;text-decoration:none;text-align:center;font-family:inherit;font-weight:800;letter-spacing:.5px;transition:transform .18s,box-shadow .18s,background .18s;user-select:none}
.btn-primary{color:#fff;background:var(--btn);border-radius:14px;padding:13px 32px;font-size:15px;box-shadow:0 12px 30px rgba(244,81,27,.30),inset 0 1px 0 rgba(255,255,255,.38);border:1px solid rgba(255,150,90,.5)}
.btn-primary:hover{background:var(--btn-h);transform:translateY(-2px);box-shadow:0 18px 42px rgba(244,81,27,.40),inset 0 1px 0 rgba(255,255,255,.45)}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 20px rgba(244,81,27,.32)}
.btn-sm{color:var(--org);background:rgba(244,81,27,.08);border:1px solid rgba(244,81,27,.40);border-radius:999px;padding:7px 18px;font-size:13px;font-weight:800}
.btn-sm:hover{color:#fff;background:var(--btn);border-color:transparent;transform:translateY(-1px);box-shadow:0 8px 22px rgba(244,81,27,.32)}
.btn-dark{color:#fff;background:var(--dark);border-radius:14px;padding:13px 32px;font-size:15px;border:1px solid rgba(0,0,0,.2);box-shadow:0 16px 40px rgba(36,31,26,.28)}
.btn-dark:hover{transform:translateY(-2px);box-shadow:0 22px 50px rgba(36,31,26,.34)}
.btn-green{color:#fff;background:linear-gradient(135deg,#2f9e5f,#3fbf77);border-radius:14px;padding:13px 32px;font-size:15px;box-shadow:0 12px 30px rgba(47,158,95,.28),inset 0 1px 0 rgba(255,255,255,.35);border:1px solid rgba(87,201,140,.5)}
.btn-green:hover{transform:translateY(-2px);box-shadow:0 18px 42px rgba(47,158,95,.36)}
.btn-ghost{color:var(--ink);background:rgba(255,255,255,.5);border:1px solid rgba(255,255,255,.9);border-radius:14px;padding:13px 32px;font-size:15px;backdrop-filter:blur(12px);box-shadow:0 10px 26px rgba(120,60,10,.12)}
.btn-ghost:hover{background:rgba(255,255,255,.8);transform:translateY(-2px)}

/* ---------- 页头 ---------- */
.head{padding:52px 0 8px}
.crumb{font-size:12.5px;color:var(--gray)}
.crumb a{color:var(--gray)}
.crumb a:hover{color:var(--org)}
.no{font-size:12px;letter-spacing:3px;color:var(--org);font-weight:800;margin-top:18px}
h1{font-size:34px;letter-spacing:.5px;margin-top:10px;font-weight:800;line-height:1.35}
.lead{margin-top:14px;font-size:15.5px;color:var(--text2);max-width:760px}
@media(max-width:640px){h1{font-size:26px}.head{padding:40px 0 4px}}

/* ---------- 学习概览条 ---------- */
.ov{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 6px}
.ov .o{background:var(--glass);border:1px solid var(--glass-border);border-radius:16px;padding:14px 22px;backdrop-filter:blur(14px);box-shadow:var(--shadow);min-width:150px}
.ov .o b{font-size:22px;color:var(--org);font-weight:800;display:block;line-height:1.3}
.ov .o span{font-size:12px;color:var(--text2)}
.ov .o.dark{background:var(--dark);border-color:rgba(0,0,0,.2)}
.ov .o.dark b{color:var(--org3)}
.ov .o.dark span{color:#d8d0c4}
@media(max-width:640px){.ov .o{flex:1;min-width:calc(50% - 7px);padding:12px 16px}}

/* ---------- 筛选页签 ---------- */
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin:28px 0 20px}
.tab{border:none;background:rgba(255,255,255,.5);border:1px solid rgba(107,95,85,.22);border-radius:999px;padding:8px 20px;font-size:13.5px;font-weight:700;color:var(--text2);transition:all .18s}
.tab:hover{color:var(--org);border-color:rgba(244,81,27,.4)}
.tab.on{color:#fff;background:var(--btn);border-color:transparent;box-shadow:0 8px 22px rgba(244,81,27,.30)}
.tab .n{font-weight:600;opacity:.75;margin-left:4px;font-size:12px}

/* ---------- 课程墙卡片 ---------- */
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:0 0 30px}
.course{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--r);overflow:hidden;backdrop-filter:blur(16px);box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s;position:relative}
.course:hover{transform:translateY(-4px);box-shadow:0 20px 46px rgba(244,81,27,.16)}
.course .cover{position:relative;height:158px;overflow:hidden}
.cover::before{content:"";position:absolute;width:172px;height:172px;border-radius:50%;border:26px solid rgba(255,255,255,.13);top:-66px;right:-54px}
.cover::after{content:"";position:absolute;width:130px;height:130px;border-radius:50%;filter:blur(42px);background:radial-gradient(circle,rgba(255,138,77,.55),transparent 62%);bottom:-52px;left:-34px}
.cover .cv-t{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:15px 16px;z-index:2}
.cover .c-t{color:#fff;font-size:18px;font-weight:800;letter-spacing:.5px;line-height:1.4}
.cover .c-m{color:rgba(255,255,255,.78);font-size:12px;margin-top:4px}
.chip-lv{position:absolute;top:13px;left:14px;z-index:3;display:inline-block;font-size:11px;font-weight:800;letter-spacing:1.5px;color:#fff;background:rgba(20,16,12,.45);border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:3px 12px;backdrop-filter:blur(6px)}
.cv-1{background:linear-gradient(150deg,#241f1a,#3a2c20)}
.cv-2{background:linear-gradient(150deg,#177245,#2f9e5f)}
.cv-3{background:linear-gradient(150deg,#b23a12,#f4511b)}
.cv-4{background:linear-gradient(150deg,#4a423a,#241f1a)}
.cv-5{background:linear-gradient(150deg,#6a5f55,#3a2c20)}
.course .body{padding:16px 20px 20px;display:flex;flex-direction:column;flex:1}
.course .t{font-size:16px;font-weight:800;color:var(--ink);line-height:1.5}
.course .d{font-size:13px;color:var(--text2);margin-top:6px;flex:1}
.course .meta{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--gray);margin-top:10px}
.meta .m{display:inline-flex;align-items:center;gap:5px}
.meta .m svg{width:13px;height:13px;color:var(--org2);flex:0 0 auto}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:800;border-radius:999px;padding:3px 12px;white-space:nowrap}
.badge.buy{color:#1e7a45;background:var(--grnl);border:1px solid rgba(47,158,95,.35)}
.badge.doing{color:#b23a12;background:var(--orgl);border:1px solid rgba(244,81,27,.35)}
.badge.none{color:var(--text2);background:rgba(255,255,255,.55);border:1px solid rgba(107,95,85,.25)}
.progress{margin-top:12px}
.progress .pb{height:6px;border-radius:999px;background:rgba(36,31,26,.10);overflow:hidden}
.progress .pb i{display:block;height:100%;border-radius:999px;background:var(--btn)}
.progress .pt{display:flex;justify-content:space-between;font-size:11.5px;color:var(--gray);margin-top:5px}
.course .foot{margin-top:14px;display:flex;align-items:center;justify-content:space-between;gap:10px}
.price{color:var(--org);font-weight:800;font-size:15px}
.price small{font-size:11.5px;color:var(--gray);font-weight:600;margin-left:4px}
@media(max-width:960px){.course-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.course-grid{grid-template-columns:1fr}.course .cover{height:140px}}

/* ---------- 播放教室 ---------- */
.room{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:20px;align-items:start;padding:24px 0 50px}
@media(max-width:960px){.room{grid-template-columns:1fr}}
.player-col{min-width:0}
.player-box{position:relative;border-radius:var(--r);overflow:hidden;background:#16120e;border:1px solid rgba(0,0,0,.25);box-shadow:0 24px 60px rgba(36,31,26,.28);aspect-ratio:16/9}
.player-stage{width:100%;height:100%}
.player-stage video{width:100%;height:100%;object-fit:contain}
.player-fallback{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#eadfd3;text-align:center;padding:26px}
.player-fallback[hidden]{display:none}
.player-fallback .pf-ico{width:66px;height:66px;border-radius:50%;border:2px solid rgba(255,255,255,.25);display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--org3)}
.player-fallback .pf-ico svg{width:26px;height:26px}
.player-fallback p{font-size:14px}
.player-fallback .pf-sub{font-size:12px;color:#9d9286;max-width:430px;margin-top:6px;line-height:1.8}
.player-mask{position:absolute;inset:0;background:rgba(22,18,14,.84);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;z-index:10;padding:24px}
.player-mask[hidden]{display:none}
.mask-card{max-width:380px;text-align:center;color:#fff}
.mask-card .mc-ico{width:58px;height:58px;margin:0 auto 14px;border-radius:16px;background:var(--btn);display:flex;align-items:center;justify-content:center;box-shadow:0 12px 30px rgba(244,81,27,.4)}
.mask-card .mc-ico svg{width:26px;height:26px;color:#fff}
.mask-card .mc-t{font-size:20px;font-weight:800}
.mask-card .mc-s{font-size:13px;color:#d8d0c4;margin:10px 0 20px;line-height:1.8}
.lesson-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:16px}
.lesson-bar .tt{font-size:16px;font-weight:800;color:var(--ink)}
.lesson-bar .dur{font-size:12.5px;color:var(--gray)}
.lesson-bar .state{margin-left:auto;font-size:12px;font-weight:800}
.lesson-bar .state.trial{color:#b23a12;background:var(--orgl);border:1px solid rgba(244,81,27,.35);border-radius:999px;padding:3px 14px}
.lesson-bar .state.buy{color:#1e7a45;background:var(--grnl);border:1px solid rgba(47,158,95,.35);border-radius:999px;padding:3px 14px}

/* 侧栏 */
.side{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--r);backdrop-filter:blur(16px);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;min-height:560px}
.side .tabs-row{display:flex;border-bottom:1px solid rgba(244,81,27,.14)}
.side .tab-btn{flex:1;padding:14px 10px;text-align:center;font-size:14px;font-weight:800;color:var(--text2);background:none;border:none;border-bottom:2px solid transparent}
.side .tab-btn:hover{color:var(--org)}
.side .tab-btn.on{color:var(--org);border-bottom-color:var(--org)}
.side .panel{display:none;flex-direction:column;max-height:560px;overflow:hidden}
.side .panel.on{display:flex}
.panel .sc{overflow-y:auto;flex:1}

/* 目录 */
.mod{border-bottom:1px solid rgba(244,81,27,.10)}
.mod-head{display:flex;justify-content:space-between;align-items:center;gap:10px;width:100%;padding:14px 18px;background:none;border:none;font-size:14px;font-weight:800;color:var(--ink);text-align:left}
.mod-head .cnt{font-size:11.5px;color:var(--gray);font-weight:600;white-space:nowrap}
.mod-head .arr{transition:transform .2s;color:var(--org);width:14px;height:14px;flex:0 0 auto}
.mod.open .arr{transform:rotate(90deg)}
.mod-body{display:none;padding:2px 14px 14px}
.mod.open .mod-body{display:block}
.lesson{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:12px;font-size:13.5px;color:var(--text2);background:none;border:none;width:100%;text-align:left}
.lesson:hover{background:rgba(244,81,27,.06)}
.lesson .nm{flex:1;line-height:1.5}
.lesson .dur{font-size:12px;color:var(--gray);white-space:nowrap}
.lesson .st{width:18px;height:18px;flex:0 0 18px;color:var(--gray)}
.lesson.cur{background:rgba(244,81,27,.10);color:var(--ink);font-weight:700}
.lesson.cur .st{color:var(--org)}
.lesson.done .st{color:var(--grn)}
.lesson.locked{color:var(--gray);cursor:not-allowed}
.lesson .playnow{display:none}
.lesson.cur .playnow{display:inline-flex;align-items:center;font-size:11px;font-weight:800;color:var(--org);background:rgba(244,81,27,.10);border-radius:999px;padding:2px 10px;white-space:nowrap}

/* 提问区 */
.qa{padding:16px 18px;display:flex;flex-direction:column;gap:14px}
.q-item .q-t{font-size:13.5px;color:var(--ink);font-weight:700;line-height:1.6}
.q-item .q-m{font-size:12px;color:var(--gray);margin-top:3px}
.q-item .q-a{font-size:12.5px;color:var(--text2);margin-top:8px;padding:10px 12px;background:rgba(255,255,255,.55);border-radius:10px;border:1px solid rgba(244,81,27,.10);line-height:1.8}
.qa-empty{padding:40px 20px;text-align:center;color:var(--gray);font-size:13px}
.qa-form{padding:14px 18px 16px;border-top:1px solid rgba(244,81,27,.14)}
.qa-form textarea{width:100%;min-height:74px;resize:vertical;border:1px solid rgba(244,81,27,.25);border-radius:12px;padding:10px 12px;font-family:inherit;font-size:13.5px;color:var(--text);background:rgba(255,255,255,.6);line-height:1.7}
.qa-form textarea:focus{outline:2px solid rgba(244,81,27,.4);outline-offset:0}
.qa-form .row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:8px}
.qa-form .tip{font-size:11.5px;color:var(--gray)}

/* 应用顶栏（播放教室） */
.appbar{display:flex;align-items:center;gap:18px;padding:12px 28px;max-width:1080px;margin:0 auto}
.appbar .back{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;color:var(--text2);white-space:nowrap}
.appbar .back:hover{color:var(--org)}
.appbar .back svg{width:15px;height:15px}
.appbar .ttl{flex:1;min-width:0;font-size:15px;font-weight:800;color:var(--ink);text-overflow:ellipsis;overflow:hidden;white-space:nowrap;text-align:center}
.appbar .ttl .csep{color:var(--gray);font-weight:600;margin:0 8px}
.user{display:flex;align-items:center;gap:9px;white-space:nowrap}
.user .ava{width:34px;height:34px;border-radius:50%;background:var(--btn);color:#fff;font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(244,81,27,.32);border:1px solid rgba(255,170,110,.45)}
.user .uname{font-size:13px;font-weight:700;color:var(--text2)}
@media(max-width:640px){
  .appbar{gap:10px;padding:10px 14px}
  .appbar .ttl .csep{display:none}
  .appbar .ttl{font-size:13px;text-align:left}
  .user .uname{display:none}
}

/* ---------- 底部版权 ---------- */
footer{padding:36px 0 60px;text-align:center;color:var(--gray);font-size:12px;line-height:2.1}
footer .links{margin-bottom:6px}
footer .links a{color:var(--text2);margin:0 10px;font-size:12px}
footer .links a:hover{color:var(--org)}

/* ---------- 轻提示 ---------- */
.toast{position:fixed;left:50%;bottom:36px;transform:translateX(-50%) translateY(18px);opacity:0;pointer-events:none;background:var(--dark);color:#f2ece4;padding:12px 22px;border-radius:14px;font-size:13.5px;box-shadow:0 20px 50px rgba(36,31,26,.32);transition:all .25s;z-index:90;max-width:86vw;line-height:1.7}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 通用 ---------- */
.glass{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--r);backdrop-filter:blur(20px) saturate(150%);-webkit-backdrop-filter:blur(20px) saturate(150%);box-shadow:var(--shadow)}
.smnote{font-size:12px;color:var(--gray);margin-top:12px}

/* 动效降级 */
@media (prefers-reduced-motion: reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  html{scroll-behavior:auto}
}


/* ============================================================
   追加组件：课程详情页 + 我的学习页
   ============================================================ */

/* 标签 / 收束块 / 分区标题 */
.chip{display:inline-block;font-size:12px;font-weight:800;color:#fff;background:var(--btn);padding:5px 16px;border-radius:999px;letter-spacing:2px;box-shadow:0 8px 20px rgba(244,81,27,.32);border:1px solid rgba(255,170,110,.45)}
.keybox{margin-top:26px;background:linear-gradient(150deg,#241f1a,#3a2c20);color:#fff;border-radius:18px;padding:26px 30px;position:relative;overflow:hidden;box-shadow:0 20px 50px rgba(36,31,26,.25)}
.keybox::before{content:"";position:absolute;width:220px;height:220px;border-radius:50%;filter:blur(46px);background:radial-gradient(circle,rgba(255,138,77,.28),transparent 62%);top:-100px;right:-60px}
.keybox .lbl{font-size:12px;letter-spacing:2px;color:var(--org3);margin-bottom:8px;position:relative}
.keybox p{font-size:15px;color:#f2ece4;line-height:2;position:relative;font-weight:600}
.seg{display:flex;align-items:baseline;gap:14px;margin:46px 0 18px;flex-wrap:wrap}
.seg h2{font-size:23px;font-weight:800;letter-spacing:.5px}
.seg .sub{color:var(--gray);font-size:13.5px}

/* 详情页 Hero */
.dhero{display:grid;grid-template-columns:400px 1fr;gap:26px;align-items:stretch;margin-top:26px}
.dhero .dcover{position:relative;border-radius:var(--r);overflow:hidden;min-height:260px;box-shadow:0 24px 60px rgba(36,31,26,.3)}
.dhero .dcover .cv-t{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:22px}
.dhero .dcover .c-t{color:#fff;font-size:24px;font-weight:800;line-height:1.45}
.dhero .dcover .c-m{color:rgba(255,255,255,.78);font-size:13px;margin-top:6px}
.dinfo{display:flex;flex-direction:column;gap:14px;padding:6px 2px}
.dinfo h1{font-size:27px;line-height:1.4;font-weight:800}
.dinfo .lead{font-size:14.5px;color:var(--text2);line-height:1.9}
.info-row{display:flex;gap:10px;flex-wrap:wrap}
.info-item{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--text2);background:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.85);border-radius:999px;padding:6px 14px}
.info-item svg{width:14px;height:14px;color:var(--org2)}
.price-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:6px}
.price-row .price{font-size:26px;color:var(--org);font-weight:800}
.price-row .price small{font-size:13px;color:var(--gray);font-weight:600;margin-left:8px}
.price-row .old{font-size:13px;color:var(--gray);text-decoration:line-through}
.price-row .acts{display:flex;gap:12px;flex-wrap:wrap;margin-left:auto}
.tip-line{font-size:12.5px;color:var(--gray)}
@media(max-width:900px){.dhero{grid-template-columns:1fr}.dhero .dcover{min-height:200px}}

/* 详情说明卡（适用人群/学完收获等） */
.duo2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.duo2 .d2{background:var(--glass);border:1px solid var(--glass-border);border-radius:18px;padding:24px 26px;backdrop-filter:blur(14px);box-shadow:var(--shadow)}
.duo2 .d2 h3{font-size:15.5px;font-weight:800;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.duo2 .d2 h3::before{content:"";width:10px;height:10px;border-radius:3px;background:var(--btn);flex:0 0 auto}
.duo2 .d2 p,.duo2 .d2 li{font-size:13.5px;color:var(--text2);line-height:1.95}
.duo2 .d2 ul{padding-left:18px}
.duo2 .d2 li::marker{color:var(--org2)}
@media(max-width:900px){.duo2{grid-template-columns:1fr}}

/* 常见问题 */
.lite{display:flex;gap:18px;align-items:flex-start;background:var(--glass);border:1px solid var(--glass-border);border-radius:16px;padding:18px 22px;margin-bottom:12px;backdrop-filter:blur(14px);box-shadow:var(--shadow)}
.lite .q{flex:0 0 190px;font-weight:800;font-size:14px;color:var(--ink)}
.lite .a{flex:1;font-size:13px;color:var(--text2)}
@media(max-width:720px){.lite{flex-direction:column}.lite .q{flex:0 0 auto}}

/* 我的学习 */
.lrn-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:start;padding-bottom:40px}
@media(max-width:960px){.lrn-grid{grid-template-columns:1fr}}
.group-t{display:flex;align-items:center;gap:12px;margin:30px 0 14px}
.group-t .gt{font-size:17px;font-weight:800}
.group-t .n{font-size:12px;color:var(--gray);background:rgba(255,255,255,.6);border:1px solid rgba(107,95,85,.2);border-radius:999px;padding:2px 12px}
.lrow{display:grid;grid-template-columns:190px 1fr auto;gap:18px;align-items:center;background:var(--glass);border:1px solid var(--glass-border);border-radius:18px;padding:14px;backdrop-filter:blur(14px);box-shadow:var(--shadow);margin-bottom:14px;transition:transform .2s,box-shadow .2s}
.lrow:hover{transform:translateY(-2px);box-shadow:0 18px 42px rgba(244,81,27,.14)}
.lrow .thumb{position:relative;border-radius:12px;overflow:hidden;height:96px}
.lrow .thumb .cv-t{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:10px 12px}
.lrow .thumb .c-t{color:#fff;font-size:14px;font-weight:800;line-height:1.35}
.lrow .thumb .c-m{color:rgba(255,255,255,.75);font-size:10.5px;margin-top:3px}
.lrow .mid .tt{font-size:16px;font-weight:800;color:var(--ink)}
.lrow .mid .dd{font-size:12.5px;color:var(--text2);margin-top:3px;line-height:1.7}
.lrow .mid .progress{margin-top:10px;max-width:440px}
.lrow .act{display:flex;flex-direction:column;gap:8px;align-items:flex-end}
.lrow .act .pr{color:var(--org);font-weight:800;font-size:15px}
@media(max-width:720px){.lrow{grid-template-columns:1fr;gap:12px}.lrow .thumb{height:130px}.lrow .act{flex-direction:row;align-items:center;justify-content:space-between;width:100%}}
.side-data{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--r);backdrop-filter:blur(16px);box-shadow:var(--shadow);padding:22px 24px;position:sticky;top:84px}
.side-data h3{font-size:15px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-data h3::before{content:"";width:10px;height:10px;border-radius:3px;background:var(--btn);flex:0 0 auto}
.data-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.data-cell{background:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.85);border-radius:12px;padding:12px;text-align:center}
.data-cell b{font-size:20px;color:var(--org);font-weight:800;display:block;line-height:1.3}
.data-cell span{font-size:11.5px;color:var(--text2)}
.quick{display:flex;flex-direction:column;gap:8px;margin-top:16px}
.quick a{font-size:13px;color:var(--text2);padding:10px 12px;border-radius:10px;background:rgba(255,255,255,.5);border:1px solid rgba(255,255,255,.85);text-decoration:none}
.quick a:hover{color:var(--org);border-color:rgba(244,81,27,.3)}

/* 视频源标识 */
.src-hint{font-size:12px;color:var(--gray);white-space:nowrap}
@media(max-width:640px){.src-hint{display:none}}