:root{
  --navy:#0e2a47;--navy2:#133c66;--navy3:#0a1e35;--red:#e23b30;--orange:#f2691f;--gold:#eda92c;--green:#1f8f5b;--teal:#0f9aa7;--bg:#f5f7fa;--card:#fff;--ink:#141f2c;--sub:#5a6a7c;--muted:#93a1b1;--line:#e4eaf1;--soft:#f4f7fa;
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Helvetica Neue","Microsoft YaHei",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;line-height:1.5}
a{text-decoration:none;color:inherit}.screen{min-height:844px;padding-bottom:96px;overflow-x:hidden}.screen.dark{background:#0d1219;color:#e7edf4}.ic{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto}
.statusbar{position:fixed;top:0;left:0;right:0;height:48px;z-index:5;display:flex;align-items:center;justify-content:space-between;padding:6px 26px 0;font-size:14px;font-weight:700;color:var(--ink);pointer-events:none}.statusbar.light{color:#fff}.sig{display:flex;align-items:center;gap:5px}.sig svg{width:17px;height:12px;fill:currentColor}
.appbar{position:relative;padding:58px 18px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;align-items:center;gap:10px}.logo{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--red),var(--orange));box-shadow:0 6px 14px rgba(226,59,48,.35)}.brand b{font-size:16.5px;font-weight:800}.brand small{display:block;color:var(--muted);font-size:10.5px;font-weight:600;letter-spacing:.4px}.icon-btn{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:#fff;border:1px solid var(--line);color:var(--sub);position:relative}.icon-btn .dot{position:absolute;top:8px;right:9px;width:7px;height:7px;border-radius:99px;background:var(--red);border:1.5px solid #fff}
.hero{position:relative;margin:6px 18px 0;border-radius:22px;overflow:hidden;color:#fff;padding:24px 20px 22px;background:linear-gradient(135deg,#0c2745 0%,#144a7d 55%,#bc2a21 150%)}.hero::before{content:"";position:absolute;right:-46px;top:-56px;width:190px;height:190px;border-radius:50%;background:radial-gradient(circle,rgba(242,105,31,.4),transparent 68%)}.hero::after{content:"";position:absolute;right:14px;bottom:-30px;width:130px;height:130px;border:1.5px solid rgba(255,255,255,.16);border-radius:34px;transform:rotate(22deg)}.hero>*{position:relative;z-index:1}.eyebrow{font-size:10.5px;font-weight:800;letter-spacing:1.4px;opacity:.86}.hero h2{margin-top:8px;font-size:26px;font-weight:800}.hero p,.channel-hero p{margin-top:8px;font-size:13px;opacity:.88;line-height:1.55}.hero-cta{margin-top:16px;display:flex;gap:10px}
.channel-hero{position:relative;overflow:hidden;color:#fff;padding:74px 20px 22px;min-height:200px;display:flex;flex-direction:column;justify-content:flex-end}.channel-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 82% 12%,rgba(255,255,255,.2),transparent 55%),radial-gradient(circle at 8% 92%,rgba(0,0,0,.22),transparent 55%)}.channel-hero>*{position:relative;z-index:1}.big-ic{position:absolute!important;right:8px;top:44px;width:120px;height:120px;opacity:.16;color:#fff}.big-ic svg{width:100%;height:100%}.channel-hero h2{margin-top:6px;font-size:24px;font-weight:800}.back{position:absolute;top:56px;left:16px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:rgba(255,255,255,.14);color:#fff;z-index:2}
.sec{padding:22px 18px 0}.sec-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.sec-head h3{font-size:18px;font-weight:800;display:flex;align-items:center;gap:9px}.sec-head h3::before{content:"";width:4px;height:16px;border-radius:3px;background:linear-gradient(180deg,var(--red),var(--orange))}.sec-head a{color:var(--muted);font-size:12.5px;font-weight:600;display:inline-flex;align-items:center;gap:2px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px}.tag{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:7px;font-size:11px;font-weight:700;line-height:1}.tag.red{color:var(--red);background:#fdecea}.tag.blue{color:#1a5fb4;background:#e7f0fb}.tag.green{color:var(--green);background:#e6f4ec}.tag.gold{color:#b57a12;background:#fbf1da}.tag.gray{color:var(--sub);background:var(--soft)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:44px;padding:0 20px;border:0;border-radius:13px;background:var(--red);color:#fff;font-size:15px;font-weight:800}.btn.block{width:100%}.btn.ghost{background:rgba(255,255,255,.14);color:#fff;border:1.5px solid rgba(255,255,255,.28)}.btn.white{background:#fff;color:var(--red);border:0}.btn.navy{background:var(--navy)}
.chip-row{display:flex;gap:8px;overflow-x:auto;padding:16px 18px 2px;scrollbar-width:none}.chip{flex:0 0 auto;padding:7px 15px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--sub);font-size:12.5px;font-weight:600}.chip.on{background:var(--navy);border-color:var(--navy);color:#fff}.chip.red{background:var(--red);border-color:var(--red);color:#fff}.tabs{display:flex;gap:14px;overflow-x:auto;padding:12px 18px 0;color:var(--sub);font-size:12.5px;font-weight:600;scrollbar-width:none}.tabs span{flex:0 0 auto;padding-bottom:4px}.tabs .on{color:var(--red);font-weight:800;border-bottom:2px solid var(--red)}
.row{display:flex;align-items:center;gap:12px;padding:13px 14px;background:#fff;border:1px solid var(--line);border-radius:14px}.row+.row{margin-top:10px}.lead{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;color:#fff;flex:0 0 auto}.lead .ic{width:20px;height:20px}.tt{flex:1;min-width:0}.tt b{display:block;font-size:14.5px;font-weight:700;line-height:1.35}.tt p{margin-top:3px;color:var(--muted);font-size:12px;line-height:1.35}.act{color:var(--red);font-size:12.5px;font-weight:700;flex:0 0 auto}
.course-scroll{display:flex;gap:12px;overflow-x:auto;padding:2px 18px 6px;scrollbar-width:none}.course-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:16px 18px 0}.course-card{flex:0 0 200px;background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.cover{position:relative;height:104px;display:flex;align-items:center;justify-content:center;color:#fff;overflow:hidden}.cover::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 78% 18%,rgba(255,255,255,.28),transparent 60%),radial-gradient(circle at 12% 88%,rgba(0,0,0,.18),transparent 55%)}.cover::after{content:"";position:absolute;right:-18px;top:-24px;width:96px;height:96px;border:1.5px solid rgba(255,255,255,.22);border-radius:26px;transform:rotate(20deg)}.cover .ic{width:34px;height:34px;z-index:1;filter:drop-shadow(0 2px 6px rgba(0,0,0,.25))}.ct{position:absolute;left:10px;top:10px;z-index:2;padding:3px 8px;border-radius:7px;background:rgba(0,0,0,.34);color:#fff;font-size:10.5px;font-weight:700}.c-blue{background:linear-gradient(135deg,#12406e,#1f7aa5)}.c-red{background:linear-gradient(135deg,#b52a20,#f2691f)}.c-green{background:linear-gradient(135deg,#175c3c,#2f9d68)}.c-navy{background:linear-gradient(135deg,#0a1e35,#1a4a7a)}.c-gold{background:linear-gradient(135deg,#b57416,#eda92c)}.c-teal{background:linear-gradient(135deg,#0d6b74,#18a7b5)}
.course-body{padding:11px 12px 13px}.course-body b{display:block;min-height:38px;font-size:13.5px;font-weight:700;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.course-body p{margin-top:8px;color:var(--muted);font-size:11.5px;display:flex;align-items:center;gap:5px}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:13px 8px;text-align:center}.stat b{display:block;font-size:19px;font-weight:800;color:var(--navy)}.stat small{font-size:12px;color:var(--red)}.stat span{display:block;margin-top:4px;color:var(--muted);font-size:11.5px}
.prog{height:7px;border-radius:99px;background:#e8edf3;overflow:hidden}.prog i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--red),var(--orange))}.path{display:flex;align-items:center;margin-top:16px}.node{flex:1;text-align:center}.bubble{width:34px;height:34px;margin:0 auto;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--muted);font-size:12px;font-weight:800}.bubble.done{background:var(--green);color:#fff}.bubble.on{background:var(--red);color:#fff}.node span{display:block;margin-top:7px;font-size:11.5px;font-weight:700}.line{flex:1;height:2px;background:var(--line);margin-bottom:24px}.line.done{background:var(--green)}
.lesson{display:flex;align-items:center;gap:12px;padding:12px 2px;border-bottom:1px solid var(--line)}.lesson:last-child{border-bottom:0}.no{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--soft);color:var(--sub);font-size:12px;font-weight:800;flex:0 0 auto}.lesson.done .no{background:var(--green);color:#fff}.lesson.active .no{background:var(--red);color:#fff}.st{font-size:11.5px;font-weight:700;flex:0 0 auto}.done .st{color:var(--green)}.active .st{color:var(--red)}.todo{color:var(--muted)}
.tabbar{position:fixed;left:0;right:0;bottom:0;height:78px;z-index:5;display:grid;grid-template-columns:repeat(4,1fr);background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-top:1px solid var(--line);padding:8px 8px 16px}.tabbar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;color:var(--muted);font-size:11px;font-weight:600}.tabbar .ic{width:23px;height:23px}.tabbar .on{color:var(--red);font-weight:800}.fixed-action{position:fixed;left:0;right:0;bottom:0;height:88px;z-index:5;display:flex;align-items:center;gap:12px;padding:0 18px 22px;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-top:1px solid var(--line)}