.hero{background:linear-gradient(160deg,#0f1b2d,#16304f 55%,#1d3c56);color:#f3efe6;overflow:hidden}.hero-inner{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;padding:68px 20px 62px;align-items:center}@media (max-width: 860px){.hero-inner{grid-template-columns:1fr;padding:46px 20px}}.hero-kicker{font-size:12px;letter-spacing:4px;color:#c8b98f;margin-bottom:14px}.hero h1{font-size:44px;line-height:1.25;margin:0 0 14px}.hero h1 .gold{color:#e8c37e}.hero-desc{color:#b9c2cf;max-width:560px;font-size:15.5px}.hero-cta{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}.hero-stats{display:flex;gap:40px;margin-top:34px}.hero-stats b{display:block;font-size:26px;color:#e8c37e;font-family:var(--serif)}.hero-stats span{font-size:12.5px;color:#b9c2cf}.hero-card{background:#ffffff0d;border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:30px 28px 20px;position:relative}.hero-quote{font-family:var(--serif);font-size:17px;line-height:1.9;color:#e9e2cd}.hero-quote-by{text-align:right;color:#c8b98f;font-size:13px;margin-top:14px}.hero-line{width:100%;height:80px;margin-top:10px;opacity:.85}.section-title{font-size:22px}.why{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.why-item{text-align:center;padding:8px 10px}.why-ico{width:54px;height:54px;margin:0 auto 12px;border-radius:50%;background:var(--gold-soft);color:var(--gold-deep);font-family:var(--serif);font-size:20px;display:flex;align-items:center;justify-content:center}.qr-wrap{display:flex;justify-content:center;padding:8px 0}.pay-amount{text-align:center;font-size:26px;font-weight:800;color:var(--gold-deep);font-family:var(--serif)}.pay-status{text-align:center;margin-top:8px;font-size:14px;color:var(--muted)}.pay-status .pay-ok{color:var(--teal);font-weight:600}.pay-status .pay-fail{color:var(--red)}.detail-grid{display:grid;grid-template-columns:1fr 320px;gap:22px;align-items:start}@media (max-width: 900px){.detail-grid{grid-template-columns:1fr}}.detail-head{display:flex;gap:20px}@media (max-width: 640px){.detail-head{flex-direction:column}}.detail-cover-wrap{width:280px;flex-shrink:0;border-radius:12px;overflow:hidden}.detail-cover-wrap .course-cover{height:176px}.detail-info{flex:1}.buy-card{position:sticky;top:82px}.buy-price{display:flex;align-items:baseline;gap:8px}.buy-num{font-size:32px;font-weight:800;color:var(--gold-deep);font-family:var(--serif)}.origin{color:#a9b0a9;text-decoration:line-through;font-size:14px}.redeem-row{display:flex;gap:8px}.outline{display:flex;flex-direction:column}.outline-item{display:flex;align-items:center;gap:12px;padding:12px 8px;border:none;background:none;border-bottom:1px solid #eef0ea;cursor:pointer;text-align:left;font-size:14px;font-family:var(--sans);color:var(--ink);width:100%}.outline-item:hover{background:#fafbf7}.outline-item.locked{cursor:not-allowed;color:#98a1ab}.outline-idx{font-family:var(--serif);color:var(--gold-deep);width:28px}.outline-title{flex:1}.outline-dur{width:60px;text-align:right}.desc :deep(p){margin:8px 0}.learn-wrap{display:grid;grid-template-columns:320px 1fr;gap:0;min-height:calc(100vh - 62px)}@media (max-width: 900px){.learn-wrap{grid-template-columns:1fr}}.learn-side{background:#fff;border-right:1px solid var(--line);padding:18px 0}.learn-course{padding:6px 20px 16px;border-bottom:1px solid var(--line);cursor:pointer}.learn-course-title{font-family:var(--serif);font-weight:700;font-size:16px}.learn-list{max-height:calc(100vh - 220px);overflow:auto}.learn-item{display:flex;align-items:center;gap:10px;width:100%;text-align:left;padding:11px 20px;border:none;background:none;cursor:pointer;font-size:13.5px;color:var(--ink);border-left:3px solid transparent;font-family:var(--sans)}.learn-item:hover{background:#fafbf7}.learn-item.active{background:#fdf9ef;border-left-color:var(--gold);font-weight:600}.learn-idx{color:var(--muted);font-size:12px}.learn-title{flex:1}.learn-main{padding:26px 30px}.learn-heading{font-size:20px}.player-box{background:#0c1424;border-radius:14px;overflow:hidden;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center}.player-box video{width:100%;height:100%;background:#000}.player-empty{color:#8d99a8;display:flex;align-items:center;gap:10px}.learn-content{white-space:pre-wrap;font-size:14.5px}.learn-footer{display:flex;align-items:center;justify-content:space-between}.auth-page{display:flex;justify-content:center;padding:60px 20px}.auth-card{width:100%;max-width:400px;padding:30px 28px}.gold-link{color:var(--gold-deep);font-weight:600}.stat{padding:18px 20px}.stat-num{font-size:26px;font-weight:800;font-family:var(--serif);color:var(--ink)}:root{--ink: #16233b;--ink-2: #24344f;--bg: #f6f7f3;--card: #ffffff;--line: #e5e7e0;--muted: #6f7a86;--gold: #c9a45c;--gold-deep: #a9853f;--gold-soft: #f5ead3;--navy: #0f1b2d;--navy-2: #16304f;--teal: #2f7d5c;--teal-soft: #e2f0e8;--red: #c0453e;--red-soft: #f7e3e1;--serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;--sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--shadow: 0 1px 2px rgba(22, 35, 59, .05), 0 8px 24px rgba(22, 35, 59, .06);--shadow-lift: 0 2px 4px rgba(22, 35, 59, .08), 0 14px 34px rgba(22, 35, 59, .12);--radius: 14px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--sans);background:var(--bg);color:var(--ink);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{font-family:var(--serif);line-height:1.3;margin:0 0 .5em}a{color:inherit;text-decoration:none}img{max-width:100%}p{margin:.4em 0}.container{max-width:1120px;margin:0 auto;padding:0 20px}.nav{position:sticky;top:0;z-index:50;background:#0f1b2df5;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#f3efe6;border-bottom:1px solid rgba(255,255,255,.08)}.nav-inner{display:flex;align-items:center;gap:28px;height:62px}.brand{display:flex;align-items:baseline;gap:10px;font-family:var(--serif)}.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,#e8c37e,#a9853f);color:#0f1b2d;font-weight:700;font-size:20px;display:inline-flex;align-items:center;justify-content:center;transform:translateY(6px)}.brand .name{font-size:20px;font-weight:700;letter-spacing:2px}.brand .tag{font-size:11px;color:#c8b98f;letter-spacing:3px}.nav-links{display:flex;gap:22px;margin-left:12px}.nav-links a{color:#cfd6df;font-size:14px;padding:4px 2px;border-bottom:2px solid transparent}.nav-links a.router-link-active{color:#fff;border-bottom-color:var(--gold)}.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}.nav-user{color:#cfd6df;font-size:13px}.nav-user a{color:#e8c37e}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid transparent;border-radius:9px;cursor:pointer;font-size:14px;padding:9px 18px;font-family:var(--sans);line-height:1.4;transition:all .15s ease;-webkit-user-select:none;user-select:none;text-decoration:none}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,#d9b26c,#c9a45c);color:#16233b;font-weight:600}.btn-primary:hover:not(:disabled){filter:brightness(1.06);transform:translateY(-1px)}.btn-navy{background:var(--navy);color:#f3efe6}.btn-navy:hover:not(:disabled){background:var(--navy-2)}.btn-outline{background:transparent;border-color:#fff6;color:inherit}.btn-outline-dark{background:transparent;border-color:#cfd4c9;color:var(--ink)}.btn-outline-dark:hover{border-color:var(--gold);color:var(--gold-deep)}.btn-ghost{background:transparent;color:inherit}.btn-danger{background:var(--red-soft);color:var(--red)}.btn-sm{padding:5px 12px;font-size:13px;border-radius:7px}.btn-lg{padding:12px 28px;font-size:16px;border-radius:11px}.btn-block{width:100%}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.grid{display:grid;gap:20px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}@media (max-width: 960px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}@media (max-width: 620px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}.page{padding:34px 0 60px}.page-title{font-size:26px;margin-bottom:4px}.page-sub{color:var(--muted);margin-bottom:24px;font-size:14px}.course-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:all .18s ease}.course-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift)}.course-cover{height:168px;background:linear-gradient(135deg,#1c2f4d,#0f1b2d);position:relative;display:flex;align-items:center;justify-content:center}.course-cover img{width:100%;height:100%;object-fit:cover}.course-cover .cover-word{color:#e8c37ed9;font-family:var(--serif);font-size:40px;font-weight:700}.course-body{padding:16px 18px 18px;flex:1;display:flex;flex-direction:column;gap:8px}.course-title{font-size:17px;font-weight:700;font-family:var(--serif)}.course-sub{color:var(--muted);font-size:13px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.6em}.course-meta{display:flex;align-items:center;gap:8px;margin-top:auto}.badge{font-size:12px;padding:2px 9px;border-radius:20px}.badge-free{background:var(--teal-soft);color:var(--teal)}.badge-paid{background:var(--gold-soft);color:var(--gold-deep)}.badge-level{background:#eef0ea;color:var(--ink-2)}.price{margin-left:auto;color:var(--gold-deep);font-weight:700;font-size:18px}.price .free-word{color:var(--teal);font-size:15px}.price .origin{color:#a9b0a9;font-size:12px;text-decoration:line-through;font-weight:400;margin-left:4px}.field{margin-bottom:16px}.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:6px;font-weight:600}.input,.select,.textarea{width:100%;border:1px solid #d5d9cf;border-radius:9px;padding:10px 12px;font-size:14px;font-family:var(--sans);background:#fff;color:var(--ink);outline:none;transition:border-color .15s}.input:focus,.select:focus,.textarea:focus{border-color:var(--gold);box-shadow:0 0 0 3px #c9a45c26}.textarea{min-height:90px;resize:vertical}.form-tip{font-size:12px;color:var(--muted);margin-top:4px}.form-error{background:var(--red-soft);color:var(--red);border-radius:9px;padding:9px 12px;font-size:13px;margin-bottom:14px}.form-ok{background:var(--teal-soft);color:var(--teal);border-radius:9px;padding:9px 12px;font-size:13px;margin-bottom:14px}.table{width:100%;border-collapse:collapse;font-size:13.5px}.table th{text-align:left;color:var(--muted);font-weight:600;padding:10px;border-bottom:1px solid var(--line);white-space:nowrap}.table td{padding:11px 10px;border-bottom:1px solid #eef0ea;vertical-align:middle}.table tr:hover td{background:#fafbf7}.chip{display:inline-flex;align-items:center;padding:6px 16px;border-radius:20px;border:1px solid #d5d9cf;background:#fff;cursor:pointer;font-size:13px;color:var(--ink-2)}.chip.active{background:var(--navy);color:#f3efe6;border-color:var(--navy)}.chips{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px;align-items:center}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f1b2d8c;z-index:100;display:flex;align-items:center;justify-content:center;padding:20px}.modal{background:#fff;border-radius:16px;width:100%;max-width:460px;max-height:88vh;overflow:auto;padding:24px;position:relative}.modal-lg{max-width:680px}.modal h3{font-size:18px;margin-bottom:14px}.modal-close{position:absolute;top:14px;right:16px;border:none;background:none;font-size:20px;color:var(--muted);cursor:pointer}.notice{background:var(--gold-soft);border:1px solid #ecd9ae;color:#7a5c1e;border-radius:10px;padding:10px 14px;font-size:13px;margin:12px 0}.spin{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}.spin-dark{border-color:#16233b33;border-top-color:var(--ink)}@keyframes spin{to{transform:rotate(360deg)}}.loading-block{text-align:center;color:var(--muted);padding:60px 0}.footer{background:var(--navy);color:#8d99a8;margin-top:60px;padding:34px 0 28px;font-size:13px}.footer .container{display:flex;flex-direction:column;gap:10px}.footer .brand-line{color:#d8cfae;font-family:var(--serif);font-size:16px;letter-spacing:2px}.footer .risk{border-top:1px solid rgba(255,255,255,.1);padding-top:12px;line-height:1.7}.muted{color:var(--muted)}.small{font-size:12.5px}.flex{display:flex;align-items:center;gap:10px}.flex-between{display:flex;align-items:center;justify-content:space-between;gap:10px}.wrap{flex-wrap:wrap}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.divider{height:1px;background:var(--line);margin:18px 0}.progress-bar{height:7px;border-radius:6px;background:#e9ece3;overflow:hidden}.progress-bar>div{height:100%;background:linear-gradient(90deg,#c9a45c,#2f7d5c);border-radius:6px}.kbd{background:#eef0ea;border-radius:5px;padding:1px 7px;font-size:12px;font-family:ui-monospace,monospace}.tag-locked{color:var(--muted);font-size:12px}.tag-preview{color:var(--teal);font-size:12px}