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button:hover{background:var(--brand-50);transform:translateY(-1px)}.sticker-ico{display:inline-block;vertical-align:middle}.msg-body{display:inline}.bubble .sticker-ico{display:block}.msg-text{white-space:pre-wrap}.quote-chip{display:inline-flex;align-items:center;gap:6px;max-width:100%;padding:4px 10px;border-radius:8px;background:var(--brand-50);border:1px solid #b2f2d5;color:var(--brand-700);font-size:12.5px;cursor:pointer;margin-bottom:6px}.msg-row.mine .quote-chip{background:#ffffff2e;border-color:#ffffff59;color:#fff}.quote-chip .qt{opacity:.75}.quote-bar{display:flex;align-items:center;gap:8px;padding:8px 12px;margin:0 16px 8px;background:var(--brand-50);border:1px solid #b2f2d5;border-radius:10px;font-size:13px;color:var(--brand-700)}.group-note{font-size:12.5px;color:var(--text-3);background:#fff;border:1px solid var(--line);padding:14px 16px;border-radius:10px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}.stat-card .stat-label{font-size:13px;color:var(--text-3)}.stat-card .stat-value{font-size:28px;font-weight:700;margin-top:6px;letter-spacing:-.02em}.stat-card .stat-value small{font-size:13px;font-weight:400;color:var(--text-3);margin-left:4px}.manage-list{display:flex;flex-direction:column;gap:12px}.manage-item{display:flex;gap:16px;padding:14px;border:1px solid var(--line);border-radius:12px;background:#fff;align-items:center}.manage-cover{width:132px;height:78px;border-radius:10px;overflow:hidden;flex-shrink:0;background:#e6fcf5}.manage-cover img{width:100%;height:100%;object-fit:cover}.manage-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}.table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}table.table{width:100%;border-collapse:collapse;font-size:14px}table.table th,table.table td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line-2);vertical-align:middle}table.table th{background:#fafbfc;color:var(--text-2);font-weight:600;font-size:13px}table.table tr:last-child td{border-bottom:none}table.table tr:hover td{background:#fcfdfd}.pill{display:inline-flex;align-items:center;gap:4px;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:500}.pill.green{background:var(--brand-50);color:var(--brand-700)}.pill.gray{background:#f1f3f5;color:var(--text-2)}.pill.orange{background:var(--accent-50);color:#d9480f}.pill.red{background:var(--danger-50);color:var(--danger)}.pill.blue{background:#e7f5ff;color:#1971c2}.divider{height:1px;background:var(--line);margin:18px 0}.alert{padding:10px 14px;border-radius:10px;font-size:13.5px;background:#fff9db;border:1px solid #ffe066;color:#8a6d00}.alert.info{background:#e7f5ff;border-color:#a5d8ff;color:#1864ab}.alert.error{background:var(--danger-50);border-color:#ffc9c9;color:#c92a2a}.upload-zone{border:2px dashed var(--line);border-radius:12px;padding:26px;text-align:center;color:var(--text-3);cursor:pointer;transition:all .15s;background:#fcfdfd}.upload-zone:hover,.upload-zone.drag{border-color:var(--brand);background:var(--brand-50);color:var(--brand-700)}.progress{height:8px;border-radius:4px;background:var(--line);overflow:hidden}.progress>i{display:block;height:100%;background:var(--brand);transition:width .2s}.seg{display:inline-flex;padding:3px;background:var(--line-2);border-radius:10px;gap:2px}.seg button{border:none;background:none;padding:7px 16px;border-radius:8px;cursor:pointer;font-size:13.5px;color:var(--text-2)}.seg button.active{background:#fff;color:var(--text);box-shadow:0 1px 3px #0000001a;font-weight:500}.editor-toolbar{display:flex;gap:2px;flex-wrap:wrap;padding:6px;border:1px solid var(--line);border-bottom:none;border-radius:10px 10px 0 0;background:#fafbfc}.editor-toolbar button{border:none;background:none;min-width:32px;height:30px;border-radius:6px;cursor:pointer;color:var(--text-2);font-size:14px;padding:0 8px}.editor-toolbar button:hover{background:#fff;color:var(--text)}.editor-toolbar .sep{width:1px;background:var(--line);margin:4px}.editor-area{min-height:240px;max-height:52vh;overflow-y:auto;border:1px solid var(--line);border-radius:0 0 10px 10px;padding:16px;outline:none;background:#fff;line-height:1.8;font-size:15px}.editor-area:focus{border-color:var(--brand)}.editor-area:empty:before{content:"在这里输入图文内容…";color:#b3bdc7}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f171f80;z-index:100;display:flex;align-items:center;justify-content:center;padding:20px;animation:fade .15s}.modal-card{background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);width:100%;max-width:560px;max-height:88vh;display:flex;flex-direction:column;animation:pop .18s ease-out}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--line)}.modal-head h3{font-size:17px}.modal-body{padding:20px 22px;overflow-y:auto}.modal-foot{padding:14px 22px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:10px}.modal-card.wide{max-width:820px}.close-x{border:none;background:none;font-size:20px;color:var(--text-3);cursor:pointer;line-height:1;padding:4px;border-radius:6px}.close-x:hover{background:var(--line-2);color:var(--text)}.toast-wrap{position:fixed;top:20px;left:50%;transform:translate(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}.toast{background:#18212beb;color:#fff;padding:10px 18px;border-radius:10px;font-size:14px;box-shadow:var(--shadow);animation:pop .16s ease-out;max-width:86vw}.toast.success{background:#0ca678f5}.toast.error{background:#f03e3ef5}.call-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0f14d1;z-index:150;display:flex;align-items:center;justify-content:center}.call-card{background:#fff;border-radius:20px;padding:30px 40px;text-align:center;display:flex;flex-direction:column;gap:10px;align-items:center;min-width:300px}.call-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0b0e11;z-index:150;display:flex;align-items:center;justify-content:center}.call-overlay video.remote{width:100%;height:100%;object-fit:contain}.call-overlay video.local{position:absolute;right:20px;top:20px;width:200px;max-height:26vh;border-radius:12px;border:2px solid rgba(255,255,255,.25);background:#000}.call-status{position:absolute;top:20px;left:20px;color:#fff;background:#00000073;padding:6px 14px;border-radius:999px;font-size:14px}.call-controls{position:absolute;bottom:32px;left:50%;transform:translate(-50%);display:flex;gap:16px}.ctrl{width:54px;height:54px;border-radius:50%;border:none;font-size:22px;background:#ffffff29;color:#fff;cursor:pointer;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.ctrl.off{background:#fff6}.ctrl.hangup{background:var(--danger)}.audio-call{display:flex;flex-direction:column;align-items:center;gap:12px;color:#fff}.audio-call h3{font-size:22px}.call-hint{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);color:#fff;background:#0000008c;border:1px solid rgba(255,255,255,.18);padding:12px 22px;border-radius:14px;font-size:15px;letter-spacing:.02em;display:flex;align-items:center;gap:8px}.call-hint.local-hint{left:auto;right:20px;top:20px;transform:none;width:200px;max-height:26vh;padding:8px 12px;font-size:13px;justify-content:center;border-radius:12px}.cover-colors{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.cover-color{width:32px;height:32px;border-radius:9px;border:2px solid transparent;cursor:pointer;transition:transform .12s,box-shadow .12s;padding:0}.cover-color:hover{transform:translateY(-1px)}.cover-color.active{border-color:var(--brand);box-shadow:0 0 0 3px #09926829}.cover-color.auto{width:auto;padding:0 10px;font-size:12.5px;color:var(--text-2);background:#f1f3f5;border-color:var(--line)}.cover-color.auto.active{color:var(--brand-700);border-color:var(--brand);background:#e6fcf5}.cover-preview{margin-top:12px;width:240px;aspect-ratio:16 / 9;border-radius:12px;overflow:hidden;border:1px solid var(--line)}.lightbox{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;background:#080c10e6;display:flex;align-items:center;justify-content:center;padding:4vh 4vw;animation:fade-in .12s ease-out}.lightbox img{max-width:92vw;max-height:88vh;object-fit:contain;border-radius:10px;box-shadow:0 24px 60px #00000073;background:#111}.lightbox-close{position:absolute;top:22px;right:24px;width:40px;height:40px;border-radius:50%;border:none;background:#ffffff24;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center}.lightbox-close:hover{background:#ffffff42}.lightbox-tip{position:absolute;bottom:22px;left:50%;transform:translate(-50%);color:#ffffff8c;font-size:12.5px}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.login-page{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr;background:#fff}.login-hero{position:relative;overflow:hidden;padding:64px 72px;color:#fff;background:linear-gradient(150deg,#099268,#12b886 55%,#38d9a9);display:flex;flex-direction:column;justify-content:center;gap:20px}.login-hero:after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:#ffffff1a;right:-140px;bottom:-180px}.login-hero:before{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:#ffffff14;left:-100px;top:-120px}.login-hero .brand{font-size:20px;position:relative;z-index:1}.login-hero h1{font-size:38px;line-height:1.35;position:relative;z-index:1}.login-hero p{font-size:16px;opacity:.9;max-width:460px;position:relative;z-index:1;margin:0}.login-points{display:flex;flex-direction:column;gap:12px;margin-top:16px;position:relative;z-index:1}.login-point{display:flex;align-items:center;gap:12px;font-size:15px}.login-point span.ico{width:34px;height:34px;border-radius:10px;background:#ffffff2e;display:flex;align-items:center;justify-content:center;font-size:17px}.login-form-wrap{display:flex;align-items:center;justify-content:center;padding:40px}.login-form{width:100%;max-width:360px}.login-form h2{font-size:26px;margin-bottom:6px}.login-form .sub{color:var(--text-3);margin-bottom:26px;font-size:14px}.login-tabs{display:flex;gap:4px;background:var(--line-2);padding:4px;border-radius:10px;margin-bottom:22px}.login-tabs button{flex:1;border:none;background:none;padding:9px;border-radius:8px;cursor:pointer;color:var(--text-2);font-size:14px}.login-tabs button.active{background:#fff;color:var(--text);font-weight:600;box-shadow:0 1px 3px #00000014}.login-tip{margin-top:18px;font-size:12.5px;color:var(--text-3);line-height:1.7}@keyframes fade{0%{opacity:0}to{opacity:1}}@keyframes pop{0%{opacity:0;transform:translateY(6px) scale(.99)}to{opacity:1;transform:none}}@keyframes spin{to{transform:rotate(360deg)}}.spinner{width:20px;height:20px;border:2.5px solid rgba(18,184,134,.25);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite;display:inline-block}.skeleton{background:linear-gradient(90deg,#f1f3f5 25%,#f8f9fa 37%,#f1f3f5 63%);background-size:400% 100%;animation:shimmer 1.3s infinite;border-radius:8px}@keyframes shimmer{0%{background-position:100% 0}to{background-position:-100% 0}}@media (max-width: 1024px){.detail-hero,.detail-layout{grid-template-columns:1fr}.side-card{position:static}.learn-layout{grid-template-columns:1fr;height:auto}.learn-side{border-left:none;border-top:1px solid var(--line)}.login-page{grid-template-columns:1fr}.login-hero{display:none}}@media (max-width: 760px){.container{padding:18px 14px 60px}.header-inner{padding:0 14px;gap:10px}.nav-links{gap:0;overflow-x:auto}.nav-link{padding:8px 10px;font-size:14px}.user-name,.role-tag{display:none}.hero{padding:30px 22px;border-radius:16px}.hero h1{font-size:24px}.course-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.im-layout{grid-template-columns:1fr}.im-list{display:none}.im-layout.mobile-list .im-list{display:flex}.im-layout.mobile-list .im-win{display:none}.form-grid{grid-template-columns:1fr}.manage-item{flex-wrap:wrap}.msg-stack{max-width:82%}.learn-content{padding:20px 16px 60px}}@media (max-width: 760px){.im-layout .im-list{display:flex}.im-layout .im-win,.im-layout.has-active .im-list{display:none}.im-layout.has-active .im-win{display:flex}}