/* 知行學堂 DEMO：線上課程銷售平台共用樣式 */
:root{
  --navy:#1F3A5F; --navy2:#2E5484; --ink:#1B2430; --ink2:#4B5563; --ink3:#8A94A3;
  --org:#E07A1F; --org2:#C9681A; --orgsoft:#FBEBD9; --teal:#1E8C7A; --tealsoft:#DDF1EC;
  --red:#C0392B; --rule:#E3E7ED; --paper:#FFFFFF; --soft:#F6F4EF; --soft2:#EEF2F7;
  --fb:"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,sans-serif;
  --r:14px; --shadow:0 10px 30px rgba(31,58,95,.10); --wrap:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--fb);color:var(--ink);background:var(--paper);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.muted{color:var(--ink2)}
.tiny{font-size:13px;color:var(--ink3)}

/* DEMO 提示條 */
.demo-bar{background:var(--navy);color:#DCE6F2;font-size:13px;text-align:center;padding:6px 16px}
.demo-bar b{color:#FFD7AE;font-weight:500}

/* 頁首 */
.site-head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--rule)}
.site-head .wrap{display:flex;align-items:center;gap:28px;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px;color:var(--navy);letter-spacing:.04em}
.logo i{width:30px;height:30px;border-radius:9px;background:var(--org);display:grid;place-items:center;color:#fff;font-style:normal;font-size:16px}
.nav{display:flex;gap:22px;font-size:15px;color:var(--ink2);flex:1}
.nav a:hover,.nav a.on{color:var(--navy)}
.nav a.on{font-weight:700}
.head-act{display:flex;align-items:center;gap:12px}
.user-chip{font-size:14px;color:var(--ink2);display:flex;align-items:center;gap:8px}
.user-chip .av{width:30px;height:30px;border-radius:50%;background:var(--tealsoft);color:var(--teal);display:grid;place-items:center;font-weight:700;font-size:14px}

/* 按鈕 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:11px 22px;font-weight:700;font-size:15px;transition:transform .15s,background .15s,box-shadow .15s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-pri{background:var(--org);color:#fff;box-shadow:0 6px 18px rgba(224,122,31,.32)}
.btn-pri:hover{background:var(--org2)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy2)}
.btn-ghost{background:transparent;color:var(--navy);border:1.5px solid var(--rule)}
.btn-ghost:hover{border-color:var(--navy)}
.btn-lg{padding:15px 30px;font-size:17px}
.btn-block{width:100%}
.btn-sm{padding:7px 14px;font-size:13px}

/* 標籤 */
.tag{display:inline-block;font-size:12.5px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--soft2);color:var(--navy);letter-spacing:.02em}
.tag.org{background:var(--orgsoft);color:var(--org2)}
.tag.teal{background:var(--tealsoft);color:var(--teal)}
.tag.grey{background:#EEF0F3;color:var(--ink3)}

/* 區塊 */
section{padding:84px 0}
.sec-soft{background:var(--soft)}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--org);margin:0 0 10px}
h1,h2,h3{color:var(--navy);line-height:1.3;margin:0}
h2.sec-title{font-size:34px;font-weight:900;margin-bottom:14px}
.sec-lead{font-size:17px;color:var(--ink2);max-width:640px;margin:0 0 40px}

/* 首頁 hero */
.hero{padding:72px 0 80px;background:linear-gradient(180deg,#FFF9F2 0%,#fff 100%)}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:52px;font-weight:900;letter-spacing:.01em;margin:6px 0 18px}
.hero h1 em{font-style:normal;color:var(--org);position:relative}
.hero p.lead{font-size:19px;color:var(--ink2);margin:0 0 30px;max-width:520px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-art{position:relative}
.hero-art img{border-radius:22px;box-shadow:var(--shadow)}
.hero-art .float{position:absolute;left:-26px;bottom:-22px;background:#fff;border-radius:14px;box-shadow:var(--shadow);padding:14px 18px;display:flex;gap:12px;align-items:center;font-size:14px}
.hero-art .float b{font-size:22px;color:var(--navy);display:block;line-height:1.2}
.stats{display:flex;gap:40px;margin-top:44px;flex-wrap:wrap}
.stats div{font-size:14px;color:var(--ink2)}
.stats b{display:block;font-size:28px;color:var(--navy);font-weight:900;line-height:1.2}

/* 課程卡 */
.grid{display:grid;gap:26px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--rule);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card .thumb{aspect-ratio:3/2;background:var(--soft2);position:relative;overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card .thumb .tag{position:absolute;left:14px;top:14px}
.card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:19px;margin:6px 0 8px}
.card p{font-size:14.5px;color:var(--ink2);margin:0 0 16px;flex:1}
.card .meta{display:flex;gap:14px;font-size:13px;color:var(--ink3);margin-bottom:16px;flex-wrap:wrap}
.card .foot{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--rule);padding-top:16px}
.price{font-size:22px;font-weight:900;color:var(--navy)}
.price s{font-size:14px;color:var(--ink3);font-weight:400;margin-left:6px}
.card.soon{opacity:.82}
.card.soon .thumb img{filter:grayscale(.55)}
.card.soon:hover{transform:none;box-shadow:none}

/* 重點課程橫幅 */
.feature{display:grid;grid-template-columns:1fr 1fr;border-radius:22px;overflow:hidden;background:var(--navy);color:#fff;box-shadow:var(--shadow)}
.feature .txt{padding:48px 48px 44px}
.feature h3{color:#fff;font-size:32px;font-weight:900;margin:12px 0 14px}
.feature p{color:#C9D6E8;margin:0 0 22px}
.feature ul{list-style:none;padding:0;margin:0 0 28px;display:grid;gap:8px}
.feature li{padding-left:26px;position:relative;color:#E6EDF6}
.feature li:before{content:"✓";position:absolute;left:0;color:#FFB877;font-weight:900}
.feature .img{background:url(../img/cover_hero.jpg) center/cover}

/* 步驟 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:st}
.step{background:#fff;border-radius:var(--r);padding:26px 22px;border:1px solid var(--rule);counter-increment:st}
.step:before{content:counter(st,decimal-leading-zero);font-size:28px;font-weight:900;color:var(--org);display:block;margin-bottom:8px}
.step h3{font-size:18px;margin-bottom:6px}
.step p{margin:0;font-size:14.5px;color:var(--ink2)}

/* FAQ（純 CSS 展開） */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--rule);padding:4px 0}
.faq summary{list-style:none;cursor:pointer;padding:16px 36px 16px 0;font-weight:700;color:var(--navy);font-size:17px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:6px;top:12px;font-size:24px;color:var(--org);transition:transform .2s}
.faq details[open] summary:after{transform:rotate(45deg)}
.faq details p{margin:0 0 18px;color:var(--ink2)}

/* 頁尾 */
.site-foot{background:#141C27;color:#93A0B2;padding:48px 0 36px;font-size:14px}
.site-foot .wrap{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.site-foot .logo{color:#fff}
.site-foot a:hover{color:#fff}
.foot-links{display:flex;gap:22px;flex-wrap:wrap}

/* ===== 課程銷售頁 ===== */
.c-hero{background:var(--navy);color:#fff;padding:56px 0 64px}
.c-hero .wrap{display:grid;grid-template-columns:1fr 380px;gap:48px;align-items:start}
.crumb{font-size:13px;color:#9FB3CC;margin-bottom:14px}
.crumb a:hover{color:#fff}
.c-hero h1{color:#fff;font-size:42px;font-weight:900;margin:10px 0 14px}
.c-hero .lead{font-size:18px;color:#C9D6E8;margin:0 0 24px;max-width:640px}
.c-facts{display:flex;flex-wrap:wrap;gap:10px 24px;font-size:14.5px;color:#E1E9F3}
.c-facts span:before{content:"●";color:#FFB877;margin-right:7px;font-size:10px;vertical-align:2px}
.buy-card{background:#fff;color:var(--ink);border-radius:18px;box-shadow:0 24px 60px rgba(0,0,0,.25);overflow:hidden;position:sticky;top:86px}
.buy-card .prev{position:relative;aspect-ratio:16/9;background:url(../img/cover_hero.jpg) center/cover;display:grid;place-items:center}
.buy-card .prev:after{content:"";position:absolute;inset:0;background:rgba(20,28,39,.35)}
.buy-card .play{position:relative;z-index:1;width:64px;height:64px;border-radius:50%;background:#fff;display:grid;place-items:center;color:var(--org);font-size:22px;box-shadow:0 6px 20px rgba(0,0,0,.3);transition:transform .2s}
.buy-card .prev:hover .play{transform:scale(1.08)}
.buy-card .prev small{position:absolute;z-index:1;bottom:12px;color:#fff;font-size:13px;font-weight:700}
.buy-card .in{padding:24px 26px 26px}
.buy-card .price-big{font-size:36px;font-weight:900;color:var(--navy);line-height:1.1}
.buy-card .price-big s{font-size:16px;color:var(--ink3);font-weight:400;margin-left:8px}
.buy-card .off{color:var(--red);font-weight:700;font-size:14px;margin:6px 0 18px}
.buy-card .btn+.btn{margin-top:10px}
.buy-card ul{list-style:none;padding:0;margin:20px 0 0;font-size:14px;color:var(--ink2);display:grid;gap:6px}
.buy-card li:before{content:"✓";color:var(--teal);font-weight:900;margin-right:8px}
.owned-note{background:var(--tealsoft);color:var(--teal);border-radius:10px;padding:10px 14px;font-size:14px;font-weight:700;margin-bottom:14px;display:none}

.c-main{display:grid;grid-template-columns:1fr 380px;gap:48px}
.c-main>div{min-width:0}
.c-block{margin-bottom:64px}
.c-block h2{font-size:26px;font-weight:900;margin-bottom:20px}
.learn-list{display:grid;grid-template-columns:1fr 1fr;gap:14px 28px;border:1px solid var(--rule);border-radius:var(--r);padding:26px 28px;list-style:none;margin:0}
.learn-list li{padding-left:28px;position:relative;font-size:15.5px}
.learn-list li:before{content:"✓";position:absolute;left:0;color:var(--org);font-weight:900}
.for-who{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.for-who div{background:var(--soft);border-radius:var(--r);padding:22px}
.for-who b{display:block;color:var(--navy);font-size:17px;margin-bottom:6px}
.for-who p{margin:0;font-size:14.5px;color:var(--ink2)}

/* 課程大綱 */
.syl-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:14px;font-size:14px;color:var(--ink2);flex-wrap:wrap;gap:8px}
.syl{border:1px solid var(--rule);border-radius:var(--r);overflow:hidden}
.syl details{border-bottom:1px solid var(--rule)}
.syl details:last-child{border-bottom:0}
.syl summary{list-style:none;cursor:pointer;padding:16px 22px;display:flex;align-items:center;gap:12px;background:var(--soft);font-weight:700;color:var(--navy)}
.syl summary::-webkit-details-marker{display:none}
.syl summary:before{content:"›";font-size:20px;color:var(--ink3);transition:transform .2s;width:12px}
.syl details[open] summary:before{transform:rotate(90deg)}
.syl summary .n{flex:1}
.syl summary .cnt{font-size:13px;color:var(--ink3);font-weight:400}
.syl ol{list-style:none;margin:0;padding:6px 0}
.syl li{display:flex;align-items:center;gap:12px;padding:9px 22px 9px 46px;font-size:15px}
.syl li .ic{width:18px;text-align:center;color:var(--ink3);font-size:13px}
.syl li .t{flex:1}
.syl li a.t:hover{color:var(--org)}

.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.gallery figure{margin:0}
.gallery img{border-radius:12px;aspect-ratio:3/2;object-fit:cover;width:100%}
.gallery figcaption{font-size:13.5px;color:var(--ink2);margin-top:8px}

.method{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.method div{border-left:4px solid var(--org);padding:4px 0 4px 18px}
.method b{display:block;color:var(--navy);font-size:17px;margin-bottom:4px}
.method p{margin:0;color:var(--ink2);font-size:14.5px}

.cta-band{background:var(--org);color:#fff;border-radius:22px;padding:44px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:28px;font-weight:900}
.cta-band p{margin:6px 0 0;color:#FFE9D4}
.cta-band .btn{background:#fff;color:var(--org2)}

/* ===== 結帳 ===== */
.co{padding:48px 0 84px;background:var(--soft);min-height:calc(100vh - 160px)}
.co .wrap{display:grid;grid-template-columns:1fr 400px;gap:32px;align-items:start}
.panel{background:#fff;border-radius:18px;padding:30px 32px;border:1px solid var(--rule)}
.panel h2{font-size:21px;font-weight:900;margin-bottom:18px}
.panel+.panel{margin-top:22px}
.field{display:block;margin-bottom:16px}
.field span{display:block;font-size:14px;font-weight:700;color:var(--ink2);margin-bottom:6px}
.field input{width:100%;border:1.5px solid var(--rule);border-radius:10px;padding:12px 14px;font:inherit;font-size:15.5px;outline:none;transition:border-color .15s}
.field input:focus{border-color:var(--navy)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pay-opts{display:grid;gap:12px}
.pay-opt{display:flex;align-items:center;gap:14px;border:1.5px solid var(--rule);border-radius:12px;padding:14px 16px;cursor:pointer;transition:border-color .15s,background .15s}
.pay-opt:has(input:checked){border-color:var(--org);background:#FFFBF6}
.pay-opt input{accent-color:var(--org);width:18px;height:18px}
.pay-opt b{display:block;color:var(--navy)}
.pay-opt small{color:var(--ink3)}
.sum-item{display:flex;gap:14px;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--rule)}
.sum-item img{width:96px;border-radius:10px;aspect-ratio:3/2;object-fit:cover}
.sum-item b{color:var(--navy);display:block;line-height:1.4}
.sum-row{display:flex;justify-content:space-between;padding:8px 0;font-size:15px}
.sum-row.disc{color:var(--red)}
.sum-row.total{border-top:1px solid var(--rule);margin-top:8px;padding-top:16px;font-size:18px;font-weight:900;color:var(--navy)}
.coupon{display:flex;gap:8px;margin:18px 0 6px}
.coupon input{flex:1;border:1.5px solid var(--rule);border-radius:10px;padding:10px 12px;font:inherit;outline:none}
.coupon-msg{font-size:13px;min-height:20px}
.ok{color:var(--teal)} .bad{color:var(--red)}
.check{display:flex;gap:10px;font-size:14px;color:var(--ink2);margin:16px 0 18px;align-items:flex-start}
.check input{margin-top:5px;accent-color:var(--org)}
.done{text-align:center;padding:60px 32px}
.done .big{width:84px;height:84px;border-radius:50%;background:var(--tealsoft);color:var(--teal);display:grid;place-items:center;font-size:40px;margin:0 auto 22px}
.done h2{font-size:28px;margin-bottom:10px}
.done .order{font-family:ui-monospace,Consolas,monospace;background:var(--soft);display:inline-block;padding:6px 14px;border-radius:8px;margin:12px 0 26px;font-size:14px}

/* ===== 教室 ===== */
body.classroom{background:#0F151E;color:#E1E8F1;height:100vh;overflow:hidden;display:flex;flex-direction:column}
.cr-head{height:58px;display:flex;align-items:center;gap:18px;padding:0 18px;border-bottom:1px solid #222D3B;background:#141C27;flex-shrink:0}
.cr-head .logo{color:#fff;font-size:17px}
.cr-head .logo i{width:26px;height:26px;font-size:14px}
.cr-head .ttl{flex:1;font-size:15px;color:#C3CEDC;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cr-prog{display:flex;align-items:center;gap:10px;font-size:13px;color:#93A0B2}
.cr-prog .bar{width:140px;height:6px;border-radius:3px;background:#273445;overflow:hidden}
.cr-prog .bar i{display:block;height:100%;background:var(--org);width:0;transition:width .3s}
.cr-body{flex:1;display:grid;grid-template-columns:330px 1fr;min-height:0}
.cr-side{background:#141C27;border-right:1px solid #222D3B;overflow-y:auto}
.cr-side h4{margin:0;padding:18px 20px 8px;font-size:12px;letter-spacing:.14em;color:#6F7D90}
.cr-ch{border-bottom:1px solid #1E2836}
.cr-ch>button{width:100%;background:none;border:0;color:#fff;text-align:left;padding:14px 20px;font-weight:700;font-size:15px;display:flex;justify-content:space-between;align-items:center;gap:10px}
.cr-ch>button small{color:#6F7D90;font-weight:400;font-size:12px;white-space:nowrap}
.cr-ch ol{list-style:none;margin:0;padding:0 0 10px;display:none}
.cr-ch.open ol{display:block}
.cr-ch li button{width:100%;background:none;border:0;color:#AEBACA;text-align:left;padding:8px 20px 8px 22px;font-size:14px;display:flex;gap:10px;align-items:flex-start;line-height:1.5;border-left:3px solid transparent}
.cr-ch li button:hover{background:#1A2432;color:#fff}
.cr-ch li button.cur{background:#1E2A3A;color:#fff;border-left-color:var(--org)}
.cr-ch li .st{width:18px;height:18px;border-radius:50%;border:1.5px solid #3A4859;flex-shrink:0;margin-top:2px;display:grid;place-items:center;font-size:10px}
.cr-ch li .st.seen{background:var(--teal);border-color:var(--teal);color:#fff}
.cr-ch li .st.lock{border:0;color:#6F7D90;font-size:12px}
.cr-ch li button.locked{color:#5E6B7D}
.cr-main{display:flex;flex-direction:column;min-height:0;overflow-y:auto}
.player{padding:22px 26px 0}
.player-box{position:relative;width:100%;max-width:1180px;margin:0 auto;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden;box-shadow:0 18px 50px rgba(0,0,0,.45)}
.player-box iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.paywall{position:absolute;inset:0;background:rgba(15,21,30,.92);display:none;align-items:center;justify-content:center;text-align:center;padding:30px}
.paywall.on{display:flex}
.paywall h3{color:#fff;font-size:26px;margin:10px 0 10px}
.paywall p{color:#AEBACA;margin:0 0 22px}
.pw-lock{font-size:40px}
.player-ctl{max-width:1180px;margin:14px auto 0;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.player-ctl .now{font-size:18px;font-weight:700;color:#fff}
.player-ctl .now small{display:block;font-size:13px;color:#7F8DA0;font-weight:400}
.player-ctl .btns{display:flex;gap:8px}
.btn-dark{background:#212D3D;color:#DCE4EE;border:1px solid #2E3B4D}
.btn-dark:hover{background:#2A3849}
.cr-tabs{max-width:1180px;margin:22px auto 30px;width:calc(100% - 52px)}
.tabbar{display:flex;gap:4px;border-bottom:1px solid #222D3B}
.tabbar button{background:none;border:0;color:#7F8DA0;padding:10px 16px;font-weight:700;border-bottom:2px solid transparent}
.tabbar button.on{color:#fff;border-bottom-color:var(--org)}
.tabpane{display:none;padding:18px 2px;color:#B8C4D3;font-size:15px}
.tabpane.on{display:block}
.tabpane textarea{width:100%;min-height:140px;background:#141C27;border:1px solid #2A3646;border-radius:10px;color:#E1E8F1;padding:14px;font:inherit;resize:vertical;outline:none}
.tabpane textarea:focus{border-color:var(--org)}
.keys{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.keys div{background:#141C27;border-radius:10px;padding:10px 14px}
kbd{font-family:ui-monospace,Consolas,monospace;background:#26334A;border-radius:5px;padding:2px 7px;font-size:12.5px;color:#fff;margin-right:6px}
.side-toggle{display:none}

/* ===== 我的學習 ===== */
.my-card{display:grid;grid-template-columns:240px 1fr auto;gap:26px;align-items:center;background:#fff;border:1px solid var(--rule);border-radius:var(--r);padding:20px}
.my-card img{border-radius:10px;aspect-ratio:3/2;object-fit:cover}
.my-card h3{font-size:20px;margin:4px 0 8px}
.pbar{height:8px;background:var(--soft2);border-radius:4px;overflow:hidden;margin:10px 0 6px;max-width:420px}
.pbar i{display:block;height:100%;background:var(--org)}
.empty{text-align:center;padding:70px 20px;border:2px dashed var(--rule);border-radius:18px}

/* ===== 手機 ===== */
@media (max-width:960px){
  .hero .wrap,.c-hero .wrap,.c-main,.co .wrap,.feature{grid-template-columns:1fr}
  .hero h1{font-size:38px}
  .hero-art .float{left:12px}
  .grid-3,.steps,.for-who,.method,.gallery{grid-template-columns:1fr 1fr}
  .buy-card{position:static}
  .c-main aside{display:none}
  .feature .img{min-height:220px;order:-1}
  .cr-body{grid-template-columns:1fr}
  .cr-side{position:fixed;top:58px;bottom:0;left:0;width:300px;z-index:20;transform:translateX(-100%);transition:transform .25s}
  body.side-open .cr-side{transform:none;box-shadow:20px 0 50px rgba(0,0,0,.5)}
  .side-toggle{display:inline-flex}
  .cr-prog .bar{width:70px}
  .my-card{grid-template-columns:1fr}
}
@media (max-width:620px){
  section{padding:60px 0}
  .nav{display:none}
  .grid-3,.steps,.for-who,.method,.gallery,.learn-list,.two{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .c-hero h1{font-size:30px}
  h2.sec-title{font-size:27px}
  .feature .txt,.cta-band,.panel{padding:28px 22px}
  .player{padding:12px 12px 0}
  .cr-tabs{width:calc(100% - 24px)}
  .cr-head .ttl,.cr-prog span{display:none}
  .user-chip span.nm{display:none}
}
@media (min-width:961px){.c-main aside{margin-top:-330px}}