:root{--primary:#0f62fe;--primary-hover:#0353e9;--secondary:#0043ce;--background:#f4f7fb;--surface:#fff;--text-main:#161616;--text-muted:#525252;--border:#e0e0e0;--online-bg:#defbe6;--online-text:#0e6027;--physical-bg:#ffe5e5;--physical-text:#a2191f;--credit-bg:#e8f2ff;--credit-text:#0f62fe;--font-family:"Inter", system-ui, -apple-system, sans-serif;--shadow-sm:0 2px 8px #0000000a;--shadow-md:0 8px 24px #00000014;--shadow-lg:0 16px 48px #0000001f;--radius-sm:8px;--radius-md:12px;--radius-lg:20px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--background);color:var(--text-main);-webkit-font-smoothing:antialiased;line-height:1.5}.app-container{max-width:1200px;margin:0 auto;padding:0 20px 60px}.hero-header{text-align:center;margin-bottom:20px;padding:60px 0 40px}.hero-title{letter-spacing:-.02em;color:var(--text-main);background:linear-gradient(135deg, var(--primary) 0%, #001d6c 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:12px;font-size:2.5rem;font-weight:800}.hero-subtitle{color:var(--text-muted);max-width:600px;margin:0 auto;font-size:1.125rem}.filter-card{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid #fffc;flex-direction:column;gap:20px;margin-bottom:40px;padding:24px;display:flex}.search-input-group{width:100%;position:relative}.search-icon{color:var(--text-muted);position:absolute;top:50%;left:16px;transform:translateY(-50%)}.search-input{border:1px solid var(--border);border-radius:var(--radius-md);background-color:#fafafa;outline:none;width:100%;padding:16px 20px 16px 48px;font-size:1.125rem;transition:all .2s}.search-input:focus{border-color:var(--primary);background-color:#fff;box-shadow:0 0 0 3px #0f62fe1a}.filter-controls{flex-wrap:wrap;gap:16px;display:flex}.select-wrapper{flex:1;min-width:200px;position:relative}.custom-select{appearance:none;width:100%;color:var(--text-main);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;background-color:#fafafa;padding:12px 40px 12px 16px;font-size:.95rem;font-weight:500;transition:all .2s}.custom-select:focus{border-color:var(--primary);background-color:#fff;outline:none}.select-icon{pointer-events:none;color:var(--text-muted);position:absolute;top:50%;right:16px;transform:translateY(-50%)}.results-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.results-count{color:var(--text-main);font-size:1.125rem;font-weight:600}.courses-grid{grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:24px;display:grid}.course-card{background:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);color:inherit;border:1px solid #0000;flex-direction:column;padding:24px;text-decoration:none;transition:transform .3s cubic-bezier(.175,.885,.32,1.275),box-shadow .3s;display:flex;position:relative;overflow:hidden}.course-card:hover{box-shadow:var(--shadow-lg);border-color:var(--border);transform:translateY(-4px)}.course-card:before{content:"";background:linear-gradient(90deg, var(--primary), #001d6c);opacity:0;width:100%;height:4px;transition:opacity .3s;position:absolute;top:0;left:0}.course-card:hover:before{opacity:1}.card-tags{gap:8px;margin-bottom:16px;display:flex}.tag{letter-spacing:.02em;border-radius:20px;padding:4px 10px;font-size:.75rem;font-weight:700}.tag-online{background:var(--online-bg);color:var(--online-text)}.tag-physical{background:var(--physical-bg);color:var(--physical-text)}.tag-credit{background:var(--credit-bg);color:var(--credit-text)}.course-title{-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-bottom:12px;font-size:1.125rem;font-weight:700;line-height:1.4;display:-webkit-box;overflow:hidden}.course-meta{color:var(--text-muted);flex-direction:column;gap:8px;margin-top:auto;font-size:.875rem;display:flex}.meta-item{align-items:center;gap:6px;display:flex}.hero-banner-ad{color:#fff;border-radius:var(--radius-lg);width:100%;box-shadow:var(--shadow-md);background:linear-gradient(45deg,#111,#333);justify-content:space-between;align-items:center;margin-bottom:40px;padding:30px 40px;display:flex;position:relative;overflow:hidden}.hero-banner-ad:after{content:"ADVERTISEMENT";letter-spacing:.05em;color:#fff6;font-size:.6rem;position:absolute;top:8px;right:12px}.ad-badge{background:#fff3;border-radius:4px;margin-bottom:8px;padding:4px 8px;font-size:.7rem;font-weight:700;display:inline-block}.in-list-ad{text-align:center;background:#fafafa;border:1px dashed #ccc;flex-direction:column;justify-content:center;align-items:center;padding:30px;display:flex;position:relative}.in-list-ad:before{content:none}.in-list-ad:hover{box-shadow:none;transform:none}.in-list-ad:after{content:"贊助廣告";color:var(--text-muted);font-size:.65rem;position:absolute;top:8px;right:12px}.loading-state,.empty-state{text-align:center;color:var(--text-muted);padding:60px 0}.loading-spinner{color:var(--primary);margin-bottom:16px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (width<=768px){.hero-title{font-size:2rem}.filter-controls{flex-direction:column}}