.problem-index-container[data-v-0ee95304]{min-height:calc(var(--vh, 1vh)*100 - 220);padding:40px 24px;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-direction:column;flex-direction:column}.page-header[data-v-0ee95304]{text-align:center;margin-bottom:48px;-webkit-animation:fadeInDown-data-v-0ee95304 .6s ease-out;animation:fadeInDown-data-v-0ee95304 .6s ease-out}.page-title[data-v-0ee95304]{font-size:32px;font-weight:600;color:#1a1a1a;margin:0 0 12px 0;letter-spacing:1px}.page-subtitle[data-v-0ee95304]{font-size:16px;color:#8c8c8c;margin:0}.problem-card[data-v-0ee95304]{background:#fff;border-radius:16px;padding:32px 24px;text-align:center;-webkit-transition:all .3s cubic-bezier(.4,0,.2,1);transition:all .3s cubic-bezier(.4,0,.2,1);border:1px solid #f0f0f0;height:100%;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-direction:column;flex-direction:column;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;min-height:320px;-webkit-animation:fadeInUp-data-v-0ee95304 .6s ease-out both;animation:fadeInUp-data-v-0ee95304 .6s ease-out both}.problem-card[data-v-0ee95304]:first-child{-webkit-animation-delay:.1s;animation-delay:.1s}.problem-card[data-v-0ee95304]:nth-child(2){-webkit-animation-delay:.2s;animation-delay:.2s}.problem-card[data-v-0ee95304]:nth-child(3){-webkit-animation-delay:.3s;animation-delay:.3s}.problem-card[data-v-0ee95304]:nth-child(4){-webkit-animation-delay:.4s;animation-delay:.4s}.problem-card[data-v-0ee95304]:hover{-webkit-transform:translateY(-8px);transform:translateY(-8px);-webkit-box-shadow:0 20px 40px rgba(0,0,0,.12);box-shadow:0 20px 40px rgba(0,0,0,.12);border-color:#409eff}.card-icon-wrapper[data-v-0ee95304]{position:relative;width:120px;height:120px;margin-bottom:24px}.icon-bg[data-v-0ee95304]{position:absolute;inset:-10px;border-radius:50%;opacity:.1;-webkit-transform:scale(1);transform:scale(1);-webkit-transition:-webkit-transform .3s ease;transition:-webkit-transform .3s ease;transition:transform .3s ease;transition:transform .3s ease,-webkit-transform .3s ease}.problem-card:hover .icon-bg[data-v-0ee95304]{-webkit-transform:scale(1.1);transform:scale(1.1)}.card-icon[data-v-0ee95304]{width:100px;height:100px;-o-object-fit:contain;object-fit:contain;position:relative;z-index:1}.card-title[data-v-0ee95304]{font-size:20px;font-weight:600;color:#262626;margin:0 0 12px 0;line-height:1.4}.card-button[data-v-0ee95304]{width:100%;max-width:200px;border-radius:8px;padding:12px 24px;font-size:15px;font-weight:500;border:none;-webkit-transition:all .3s ease;transition:all .3s ease;-webkit-box-shadow:0 4px 12px rgba(102,126,234,.3);box-shadow:0 4px 12px rgba(102,126,234,.3);-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center}.card-button>.anticon[data-v-0ee95304],.card-button[data-v-0ee95304]{display:-webkit-inline-box;display:-ms-inline-flexbox;display:inline-flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center}.card-button>.anticon[data-v-0ee95304]{vertical-align:middle}.card-button[data-v-0ee95304]:hover{-webkit-transform:translateY(-2px);transform:translateY(-2px);-webkit-box-shadow:0 6px 20px rgba(102,126,234,.4);box-shadow:0 6px 20px rgba(102,126,234,.4)}.card-button[data-v-0ee95304]:active{-webkit-transform:translateY(0);transform:translateY(0)}@media (max-width:768px){.problem-index-container[data-v-0ee95304]{padding:24px 16px}.page-title[data-v-0ee95304]{font-size:24px}.page-subtitle[data-v-0ee95304]{font-size:14px}.page-header[data-v-0ee95304]{margin-bottom:32px}.problem-card[data-v-0ee95304]{padding:24px 20px;min-height:280px}.card-icon-wrapper[data-v-0ee95304]{width:100px;height:100px}.card-icon[data-v-0ee95304]{width:80px;height:80px}.card-title[data-v-0ee95304]{font-size:18px}.card-description[data-v-0ee95304]{font-size:13px}}@-webkit-keyframes fadeInDown-data-v-0ee95304{0%{opacity:0;-webkit-transform:translateY(-20px);transform:translateY(-20px)}to{opacity:1;-webkit-transform:translateY(0);transform:translateY(0)}}@keyframes fadeInDown-data-v-0ee95304{0%{opacity:0;-webkit-transform:translateY(-20px);transform:translateY(-20px)}to{opacity:1;-webkit-transform:translateY(0);transform:translateY(0)}}@-webkit-keyframes fadeInUp-data-v-0ee95304{0%{opacity:0;-webkit-transform:translateY(20px);transform:translateY(20px)}to{opacity:1;-webkit-transform:translateY(0);transform:translateY(0)}}@keyframes fadeInUp-data-v-0ee95304{0%{opacity:0;-webkit-transform:translateY(20px);transform:translateY(20px)}to{opacity:1;-webkit-transform:translateY(0);transform:translateY(0)}}