.pc-nav{position:-webkit-sticky;position:sticky;top:0;z-index:100;background:rgba(0,0,0,.95);-webkit-backdrop-filter:blur(30px);backdrop-filter:blur(30px);border-bottom:2px solid rgba(255,255,255,.12)}.pc-nav-container{max-width:1180px;margin:0 auto;justify-content:space-between;padding:16px 0}.pc-hero,.pc-nav-container{display:flex;align-items:center}.pc-hero{min-height:90vh;justify-content:center;background:linear-gradient(180deg,#000000,#1a1a1a);color:white;padding:60px 20px}.pc-card{background:white;border-radius:16px;padding:24px;box-shadow:0 4px 16px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}.pc-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}.pc-button{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:12px;font-weight:600;cursor:pointer;transition:all .3s;border:none;text-decoration:none}.pc-button-primary{background:white;color:#000}.pc-button-secondary{background:rgba(255,255,255,.1);color:white;border:1px solid rgba(255,255,255,.3)}.pc-form{max-width:500px;margin:0 auto}.pc-form-group{margin-bottom:20px}.pc-form-label{display:block;margin-bottom:8px;font-weight:500;color:#333}.pc-form-input{width:100%;padding:12px 16px;border:1px solid #ddd;border-radius:8px;font-size:16px}.pc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:24px;gap:24px}@media (max-width:768px){.pc-only{display:none!important}}.mobile-homepage{min-height:100vh;background:#f4f5f3;padding-bottom:78px}.mobile-hero{background:linear-gradient(135deg,#000000,#1a1a1a);color:white;padding:18px 16px 20px}.hero-title{font-size:26px;font-weight:700;margin-bottom:6px;line-height:1.3;text-align:center}.hero-subtitle{font-size:13px;color:rgba(255,255,255,.8);margin-bottom:12px;text-align:center}.hero-auth-actions{display:flex;justify-content:center;gap:10px;margin-bottom:14px}.auth-action{display:inline-flex;align-items:center;justify-content:center;min-width:86px;min-height:34px;border-radius:999px;font-size:13px;font-weight:700;text-decoration:none}.auth-action.register{background:#ffffff;color:#111111}.auth-action.login{color:#ffffff;border:1px solid rgba(255,255,255,.34);background:rgba(255,255,255,.1)}.hero-actions{display:flex;gap:10px}.action-btn{flex:1 1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px;border-radius:12px;text-decoration:none;font-size:14px}.action-btn.primary{background:white;color:#000}.action-btn.secondary{background:rgba(255,255,255,.1);color:white;border:1px solid rgba(255,255,255,.2)}.btn-icon{font-size:22px}.section{background:white;margin-top:8px;padding:12px 14px}.section-title{font-size:17px;font-weight:600;margin:0;color:#333}.section-title-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.section-more{color:#17465b;font-size:12px;font-weight:700;text-decoration:none}.teacher-list{display:flex;flex-direction:column;gap:8px}.teacher-item{gap:10px;padding:10px;background:#f8f8f8;border-radius:12px;text-decoration:none;color:inherit}.teacher-avatar,.teacher-item{display:flex;align-items:center}.teacher-avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#000000,#1a1a1a);color:white;justify-content:center;font-size:18px;font-weight:600}.teacher-info{flex:1 1}.teacher-name{font-size:15px;font-weight:600;color:#333}.teacher-school{font-size:12px;color:#999;margin-top:2px}.teacher-stats{display:flex;gap:8px;margin-top:4px}.teacher-stats .rating{font-size:12px;color:#f59e0b}.teacher-stats .count{font-size:12px;color:#999}.review-list{display:flex;flex-direction:column;gap:8px}.review-item{display:block;padding:10px;background:#f8f8f8;border-radius:12px;color:inherit;text-decoration:none}.review-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:5px}.review-author{font-size:14px;font-weight:500;color:#333}.review-rating{font-size:12px;color:#f59e0b}.review-context{color:#777;font-size:12px;line-height:1.5;margin:-2px 0 8px}.review-content{display:-webkit-box;overflow:hidden;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:13px;color:#666;line-height:1.45}.review-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.tag{padding:3px 8px;background:#e5e5e5;border-radius:12px;font-size:11px;color:#666}.mobile-bottom-nav{position:fixed;bottom:0;left:0;right:0;background:white;border-top:1px solid #eee;padding:8px 0 calc(8px + env(safe-area-inset-bottom));z-index:100}.mobile-nav-items{display:flex;justify-content:space-around}.mobile-nav-item{display:flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;color:#999;font-size:10px}.mobile-nav-item.active{color:#000}.mobile-nav-icon{font-size:24px}@media (min-width:769px){.mobile-only{display:none!important}}@media (max-width:768px){.container{max-width:100%;padding:0 16px}.nav-bar{padding:12px 16px}.nav-menu{display:none}.mobile-menu-btn{display:flex!important}.desktop-only{display:none!important}}@media (hover:none) and (pointer:coarse){.btn,.like-button,.tag-pill{min-height:44px;min-width:44px}.btn:hover{transform:none}}