/* AI漫剧短剧学院 - 学员端样式（暗色影视风） */
*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0d1024;--card:#161a33;--line:#262b4d;--txt:#e9ebf7;--sub:#9aa0c5;--pri:#7c6cf0;--pri2:#5a4bd8;--gold:#e8b34b;--red:#e05c5c;--green:#3ecf8e}
body{background:var(--bg);color:var(--txt);font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:50;background:rgba(13,16,36,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar .in{display:flex;align-items:center;height:60px;gap:20px}
.logo{font-size:19px;font-weight:700;background:linear-gradient(135deg,#8e7cf8,#e8b34b);-webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap}
.nav{display:flex;gap:4px;flex:1;overflow-x:auto}
.nav a{padding:8px 14px;border-radius:8px;font-size:14px;color:var(--sub);white-space:nowrap}
.nav a.on{color:#fff;background:var(--pri2)}
.userbox{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--sub);white-space:nowrap}
.btn{display:inline-block;border:0;cursor:pointer;border-radius:8px;padding:9px 18px;font-size:14px;color:#fff;background:var(--pri);transition:.15s}
.btn:hover{filter:brightness(1.1)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--sub)}
.btn.gold{background:linear-gradient(135deg,#e8b34b,#d99a2b);color:#231a05;font-weight:600}
.btn.sm{padding:6px 12px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* 首页 */
.hero{padding:48px 0 32px;background:radial-gradient(1200px 400px at 20% -10%,#2b2470 0%,transparent 60%),radial-gradient(900px 300px at 90% 0,#4d3a12 0%,transparent 55%)}
.hero h1{font-size:30px;line-height:1.4}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p{color:var(--sub);margin:14px 0 24px;font-size:15px;line-height:1.8}
.grid{display:grid;gap:16px}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
@media(max-width:760px){.grid.c3,.grid.c2{grid-template-columns:1fr}.hero h1{font-size:23px}}

.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.sec-title{display:flex;align-items:baseline;justify-content:space-between;margin:28px 0 14px}
.sec-title h2{font-size:18px}
.sec-title span{font-size:12px;color:var(--sub)}

/* 课程卡 */
.course-card{cursor:pointer;transition:.15s;overflow:hidden}
.course-card:hover{transform:translateY(-2px);border-color:var(--pri)}
.course-card .cover{height:130px;border-radius:8px;background:linear-gradient(135deg,#2c2456,#1a1f3d);display:flex;align-items:center;justify-content:center;color:var(--sub);margin-bottom:12px;font-size:12px}
.course-card h3{font-size:15px;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.course-card .meta{font-size:12px;color:var(--sub);display:flex;justify-content:space-between;align-items:center;margin-top:10px}
.tag{font-size:11px;padding:2px 8px;border-radius:20px;background:#241f4d;color:#a99cf5}
.tag.lv1{background:#173227;color:#6fe3ae}.tag.lv2{background:#2c2456;color:#a99cf5}.tag.lv3{background:#3a2a17;color:#eec27a}
.price{color:var(--gold);font-weight:600}
.price.free{color:var(--green)}

/* 详情 */
.detail-head{display:flex;gap:24px;padding:28px 0}
.detail-head .cover{width:340px;height:200px;border-radius:12px;background:linear-gradient(135deg,#2c2456,#1a1f3d);flex-shrink:0;display:flex;align-items:center;justify-content:center;color:var(--sub)}
@media(max-width:760px){.detail-head{flex-direction:column}.detail-head .cover{width:100%}}
.chapter{border:1px solid var(--line);border-radius:10px;margin-bottom:12px;overflow:hidden}
.chapter .ch{padding:12px 16px;background:#1a1e3b;font-size:14px;font-weight:600;display:flex;justify-content:space-between}
.lesson{display:flex;justify-content:space-between;align-items:center;padding:11px 16px;border-top:1px solid var(--line);font-size:13px;color:var(--sub)}
.lesson .lk{color:var(--pri);cursor:pointer}
.lesson .lk.no{color:#555a7d;cursor:not-allowed}

/* 播放器 */
.player-box{position:relative;background:#000;border-radius:12px;overflow:hidden}
.player-box video{width:100%;display:block;max-height:70vh}
/* 动态漂移水印：携带用户ID+时间戳，防录屏溯源 */
.wm{position:absolute;color:rgba(255,255,255,.28);font-size:13px;white-space:nowrap;pointer-events:none;z-index:10;text-shadow:0 0 2px rgba(0,0,0,.5);animation:drift linear infinite}
@keyframes drift{0%{transform:translate(0,0)}25%{transform:translate(60px,20px)}50%{transform:translate(20px,50px)}75%{transform:translate(-40px,15px)}100%{transform:translate(0,0)}}
.speed{display:flex;gap:8px;align-items:center;margin-top:12px;font-size:13px;color:var(--sub)}
.speed a{padding:4px 10px;border-radius:6px;background:var(--card);cursor:pointer}
.speed a.on{background:var(--pri);color:#fff}

/* 列表页通用 */
.page-head{display:flex;justify-content:space-between;align-items:center;margin:24px 0 16px;flex-wrap:wrap;gap:10px}
.page-head h2{font-size:20px}
.tabs{display:flex;gap:8px}
.tabs a{padding:7px 14px;border-radius:20px;background:var(--card);font-size:13px;color:var(--sub);cursor:pointer}
.tabs a.on{background:var(--pri);color:#fff}
.search{display:flex;gap:8px}
input.inp,select.inp,textarea.inp{background:var(--card);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:10px 12px;font-size:14px;width:100%}
textarea.inp{min-height:90px;resize:vertical}
.row{display:flex;gap:12px}.row>*{flex:1}
table.tb{width:100%;border-collapse:collapse;font-size:13px}
table.tb th,table.tb td{padding:10px 8px;border-bottom:1px solid var(--line);text-align:left}
table.tb th{color:var(--sub);font-weight:500}
.st{font-size:12px;padding:2px 10px;border-radius:12px}
.st.ok{background:#173227;color:#6fe3ae}.st.no{background:#331a1a;color:#ff8a80}.st.wait{background:#332b17;color:#eec27a}

/* 登录注册 */
.auth-box{max-width:400px;margin:60px auto}
.auth-box .card{padding:28px}
.auth-box h2{margin-bottom:18px;font-size:20px}

/* 考试 */
.q-item{margin-bottom:18px}
.q-item .q{font-size:14px;margin-bottom:10px;line-height:1.6}
.opt{display:flex;align-items:center;gap:8px;padding:9px 12px;border:1px solid var(--line);border-radius:8px;margin-bottom:8px;cursor:pointer;font-size:13px}
.opt.on{border-color:var(--pri);background:#221f4a}
.timer{position:sticky;top:70px;background:#1c1830;border:1px solid var(--gold);color:var(--gold);border-radius:8px;padding:10px 14px;font-size:14px;text-align:center;margin-bottom:16px}

/* 素材库 */
.material-item .cat{font-size:12px;color:#a99cf5;margin-bottom:6px}
.material-item pre{background:#0a0d20;border:1px solid var(--line);padding:12px;border-radius:8px;font-size:12px;white-space:pre-wrap;word-break:break-all;max-height:260px;overflow:auto;color:#c9cdea}

/* 答疑 */
.post{border-bottom:1px solid var(--line);padding:14px 0}
.post .h{font-size:12px;color:var(--sub);margin-bottom:6px;display:flex;gap:10px}
.post .c{font-size:14px;line-height:1.7}

/* 个人中心 */
.me-grid{display:grid;grid-template-columns:220px 1fr;gap:20px;margin-top:20px}
@media(max-width:760px){.me-grid{grid-template-columns:1fr}}
.me-nav{display:flex;flex-direction:column;gap:6px}
.me-nav a{padding:11px 14px;border-radius:8px;font-size:14px;color:var(--sub)}
.me-nav a.on{background:var(--card);color:#fff}
.progress-bar{height:6px;background:#1a1e3b;border-radius:6px;overflow:hidden;margin-top:8px}
.progress-bar i{display:block;height:100%;background:linear-gradient(90deg,#7c6cf0,#e8b34b)}

.empty{text-align:center;color:var(--sub);padding:50px 0;font-size:14px}
.toast{position:fixed;top:74px;left:50%;transform:translateX(-50%);background:#221f4a;border:1px solid var(--pri);color:#fff;padding:10px 20px;border-radius:8px;font-size:14px;z-index:99}
footer{margin-top:60px;padding:24px 0;border-top:1px solid var(--line);color:#565b80;font-size:12px;text-align:center}