:root{--primary: #B01F24;--primary-dark: #8A171C;--primary-600: #9E1B21;--primary-tint: #FBEDEC;--primary-tint-2: #F6D9D6;--orange: #E8791E;--orange-tint: #FCEEDD;--gold: #E6A817;--gold-soft: #F3D999;--gold-tint: #FCF3DA;--petal-grad: linear-gradient(135deg, #E8791E 0%, #E6A817 100%);--navy: #B01F24;--navy-tint: #FBEDEC;--purple: #E8791E;--purple-tint: #FCEEDD;--ink-900: rgba(0, 0, 0, .92);--ink-800: rgba(0, 0, 0, .78);--text: rgba(0, 0, 0, .88);--text-secondary: rgba(0, 0, 0, .6);--text-tertiary: rgba(0, 0, 0, .45);--border: rgba(0, 0, 0, .08);--border-strong: rgba(0, 0, 0, .16);--bg: #F5F4F2;--card: #ffffff;--light-red: #FBEDEC;--success: #2E7D32;--success-tint: #E7F1E7;--warning: #C56A12;--warning-tint: #FCEEDD;--danger: #B01F24;--danger-tint: #FBEDEC;--shadow-xs: 0 0 0 1px rgba(0, 0, 0, .06);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .08);--shadow-md: 0 2px 8px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .14);--shadow-brand: 0 1px 2px rgba(0, 0, 0, .1);--r-xs: 4px;--r-sm: 8px;--r-md: 8px;--r-lg: 12px;--r-xl: 16px;--radius: 8px;--nav-h: 52px;--tab-h: 58px;--safe-t: env(safe-area-inset-top, 0px);--safe-b: env(safe-area-inset-bottom, 0px)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Roboto,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans CJK SC,Source Han Sans SC,sans-serif;color:var(--text);background:var(--bg);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;font-synthesis:none}a{color:inherit;text-decoration:none}h1,h2,h3,h4{color:var(--ink-900);font-weight:600;letter-spacing:-.01em}.page{min-height:100vh;padding-bottom:calc(var(--tab-h) + var(--safe-b) + 12px);animation:page-in .28s cubic-bezier(.22,1,.36,1)}.pad{padding:16px}@keyframes page-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.navbar{height:calc(var(--nav-h) + var(--safe-t));padding-top:var(--safe-t);display:flex;align-items:center;justify-content:center;position:fixed;top:0;left:0;right:0;background:#fff;color:var(--ink-900);font-size:16px;font-weight:600;letter-spacing:-.01em;z-index:20;border-bottom:1px solid var(--border)}.navbar .back{position:absolute;left:4px;top:0;bottom:0;display:flex;align-items:center;padding:0 12px;font-size:15px;font-weight:500;color:var(--primary)}.navbar .back:active{opacity:.6}.navbar .nav-action{position:absolute;right:14px;font-size:14px;font-weight:600;color:var(--primary)}app-navbar+*,.navbar+*{padding-top:calc(var(--nav-h) + var(--safe-t))}.card{background:var(--card);border-radius:var(--r-md);margin:12px;overflow:hidden;border:1px solid var(--border)}.cell{display:flex;align-items:center;gap:12px;padding:14px 16px;background:#fff;position:relative;transition:background .15s}.cell+.cell:before{content:"";position:absolute;left:16px;right:0;top:0;height:1px;background:var(--border)}.cell:active{background:#f3f6f8}.cell .label{flex:1;min-width:0;color:var(--ink-900);font-weight:500}.cell .value{color:var(--text-secondary)}.cell .arrow:after{content:"\203a";color:var(--text-tertiary);margin-left:8px;font-size:20px;font-weight:400}.cell-icon{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;background:var(--primary-tint);color:var(--primary);flex-shrink:0}.cell-icon app-icon{width:20px;height:20px}.btn{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:12px 20px;border:1.5px solid transparent;border-radius:999px;background:var(--primary);color:#fff;font-size:16px;font-weight:600;cursor:pointer;text-align:center;transition:background .15s ease,transform .1s ease,opacity .2s}.btn:active{background:var(--primary-dark);transform:scale(.99)}.btn:disabled{opacity:.5}.btn-plain{background:#fff;color:var(--primary);border-color:var(--primary)}.btn-plain:active{background:var(--primary-tint)}.btn-sm{width:auto;padding:7px 16px;font-size:14px;border-radius:999px;display:inline-flex}.btn-gray{background:#eef3f8;color:var(--ink-800);border-color:transparent}.btn-gray:active{background:#e2e9f0}.btn-block{width:100%}.form-item{padding:14px 16px;background:#fff;position:relative;transition:background .15s}.form-item+.form-item:before{content:"";position:absolute;left:16px;right:0;top:0;height:1px;background:var(--border)}.form-item label{display:block;color:var(--text-secondary);font-size:12.5px;font-weight:600;margin-bottom:7px;letter-spacing:0}.form-item input,.form-item textarea,.form-item select{width:100%;border:none;outline:none;font-size:15px;background:transparent;font-family:inherit;color:var(--ink-900)}.form-item input::placeholder,.form-item textarea::placeholder{color:var(--text-tertiary)}.field{width:100%;border:1px solid var(--border-strong);border-radius:var(--r-sm);padding:12px 14px;font-size:15px;background:#fff;outline:none;font-family:inherit;color:var(--ink-900);transition:border-color .18s,box-shadow .18s}.field:focus{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary)}.tabbar{position:fixed;bottom:0;left:0;right:0;height:calc(var(--tab-h) + var(--safe-b));padding-bottom:var(--safe-b);background:#ffffffd1;backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-top:1px solid rgba(0,0,0,.05);box-shadow:0 -6px 20px #0000000f;display:flex;z-index:100}.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-tertiary);font-size:11px;font-weight:500;gap:4px;position:relative;transition:color .2s}.tabbar a.active{color:var(--primary);font-weight:600}.tabbar .icon{display:flex;align-items:center;justify-content:center;width:42px;height:30px;border-radius:12px;transition:transform .28s cubic-bezier(.22,1,.36,1),background .25s ease,box-shadow .25s ease,color .2s}.tabbar .icon svg{width:22px;height:22px}.tabbar a.active .icon{color:#fff;background:linear-gradient(135deg,#c6242a,#8a171c);transform:translateY(-3px);box-shadow:0 8px 16px #b01f2461;animation:tab-pop .32s cubic-bezier(.22,1,.36,1)}@keyframes tab-pop{0%{transform:translateY(0) scale(.9)}60%{transform:translateY(-4px) scale(1.06)}to{transform:translateY(-3px) scale(1)}}.tag{display:inline-flex;align-items:center;padding:2px 9px;border-radius:999px;font-size:11px;font-weight:600;line-height:1.6}.tag-green{background:var(--success-tint);color:var(--success)}.tag-orange{background:var(--warning-tint);color:var(--warning)}.tag-gray{background:#eceff2;color:var(--text-secondary)}.tag-red{background:var(--danger-tint);color:var(--danger)}.tag-navy{background:var(--gold-tint);color:#a9781a}.tag-gold{background:var(--warning-tint);color:#b26a12}.course-card{display:flex;gap:13px;padding:12px;margin:0 12px 12px;background:#fff;border-radius:var(--r-md);border:1px solid var(--border);transition:background .14s}.course-card:active{background:#f7f9fb}.course-cover{width:120px;height:68px;border-radius:var(--r-xs);object-fit:cover;background:var(--primary-tint);flex-shrink:0}.course-title{font-weight:600;font-size:15px;color:var(--ink-900);margin-bottom:4px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.course-meta{color:var(--text-secondary);font-size:12.5px;display:flex;align-items:center;gap:6px;margin-top:2px}.stars{color:var(--gold);letter-spacing:1px;font-weight:600}.star-empty{color:#dfe1e4}.muted{color:var(--text-secondary)}.spread{display:flex;align-items:center;justify-content:space-between;gap:10px}.empty{text-align:center;color:var(--text-secondary);padding:60px 24px}.empty:before{content:"";display:block;width:56px;height:56px;margin:0 auto 14px;border-radius:50%;background:var(--primary-tint) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='28' height='28' fill='none' stroke='%23B01F24' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'><path d='M4 7h20M7 7v16a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V7M11 12v7M17 12v7'/></svg>") center / 28px no-repeat}.loading{text-align:center;color:var(--text-secondary);padding:60px}.loading:after{content:"";display:block;width:26px;height:26px;margin:0 auto 12px;border:2.5px solid var(--primary-tint);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.search-bar{padding:12px 14px 8px;background:transparent;position:sticky;top:calc(var(--nav-h) + var(--safe-t));z-index:9}.search-bar input{width:100%;padding:11px 16px 11px 40px;border-radius:var(--r-sm);border:1px solid var(--border-strong);background:#fff url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='none' stroke='%23666666' stroke-width='1.8' stroke-linecap='round'><circle cx='8' cy='8' r='6'/><path d='M17 17l-4-4'/></svg>") 14px center / 16px no-repeat;outline:none;font-size:14px;transition:box-shadow .2s,border-color .2s}.search-bar input:focus{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary)}.toast-wrap{position:fixed;top:42%;left:50%;transform:translate(-50%);z-index:3000}.toast{background:#000000d9;color:#fff;padding:11px 20px;border-radius:8px;font-size:14px;box-shadow:var(--shadow-lg);animation:toast-in .24s ease}@keyframes toast-in{0%{opacity:0;transform:translateY(6px) scale(.96)}to{opacity:1;transform:none}}.section-title{padding:20px 16px 10px;color:var(--ink-900);font-size:16px;font-weight:600;display:flex;align-items:center;justify-content:space-between;letter-spacing:-.01em}.divider-gold{height:1px;background:var(--border);margin:4px 16px}