/* 八点半技术站 - 优化合并版 CSS */
:root{--primary-blue:#3B82F6;--secondary-blue:#2563EB;--animation-duration:0.6s;--transition-fast:0.2s ease;--transition-normal:0.3s ease;--transition-slow:0.5s ease;--loader-bg-color:rgba(255,255,255,0.8);--loader-spinner-color:#3b82f6;--loader-spinner-bg:#dbeafe;--loader-text-color:#374151}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Roboto','Oxygen','Ubuntu',sans-serif;line-height:1.6;color:#333;background-color:#f8f9fa}a{text-decoration:none;color:inherit}img{max-width:100%;height:auto;display:block}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:var(--primary-blue);border-radius:4px;transition:background var(--transition-fast)}::-webkit-scrollbar-thumb:hover{background:var(--secondary-blue)}.container{width:100%;max-width:1280px;margin:0 auto;padding:0 1rem}header{background-color:#1a1a1a;padding:1rem 0}footer{background-color:#1a1a1a;color:#fff;padding:2rem 0}.page-transition{opacity:0;transition:opacity var(--transition-normal)}.page-transition.loaded{opacity:1;will-change:opacity}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.tool-card{background:white;border-radius:0.5rem;box-shadow:0 4px 6px rgba(0,0,0,0.1);padding:1.5rem;min-height:180px;transition:transform var(--transition-normal),box-shadow var(--transition-normal)}.tool-card:hover{box-shadow:0 10px 15px rgba(0,0,0,0.1);transform:translateY(-2px);will-change:transform}.hover-scale{transition:transform 0.2s}.hover-scale:hover{transform:scale(1.02)}.nav-link{position:relative;padding:0.5rem 1rem}.nav-link::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:#3b82f6;transition:all 0.3s;transform:translateX(-50%)}.nav-link:hover::after{width:100%}.btn{display:inline-flex;align-items:center;justify-content:center;padding:0.5rem 1rem;border-radius:0.375rem;transition:all 0.2s}.btn-primary{background:#3b82f6;color:white;border:none}.btn-primary:hover{background:#2563eb}.btn-outline{border:2px solid #3b82f6;color:#3b82f6;background:transparent}.btn-outline:hover{background:#3b82f6;color:white}.card{background:white;border-radius:0.5rem;box-shadow:0 2px 4px rgba(0,0,0,0.1);transition:transform 0.2s}.card:hover{transform:translateY(-2px)}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,0.5);display:flex;align-items:center;justify-content:center;z-index:1000;backdrop-filter:blur(4px)}.modal-content{background:white;padding:1.5rem;border-radius:0.5rem;position:relative;box-shadow:0 4px 6px rgba(0,0,0,0.1)}.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:var(--loader-bg-color);display:flex;align-items:center;justify-content:center;z-index:9999;opacity:0;transition:opacity var(--transition-normal);backdrop-filter:blur(2px)}.loading-content{background-color:white;border-radius:8px;box-shadow:0 10px 25px rgba(0,0,0,0.1);padding:2rem;text-align:center;transform:translateY(0);transition:transform var(--transition-fast);max-width:90%}.loading-spinner{width:48px;height:48px;border:4px solid var(--loader-spinner-bg);border-top-color:var(--loader-spinner-color);border-radius:50%;margin:0 auto 1rem;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-message{color:var(--loader-text-color);font-size:1rem;font-weight:500}.skeleton-loading{background:linear-gradient(90deg,#f0f0f0 25%,#f8f8f8 50%,#f0f0f0 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}.hidden,.d-none{display:none!important}.d-block{display:block!important}.d-flex{display:flex!important}.d-inline{display:inline!important}.d-inline-block{display:inline-block!important}.flex-row{flex-direction:row!important}.flex-column{flex-direction:column!important}.justify-center{justify-content:center!important}.align-center{align-items:center!important}.flex-wrap{flex-wrap:wrap!important}.flex-nowrap{flex-wrap:nowrap!important}.text-center{text-align:center!important}.text-left{text-align:left!important}.text-right{text-align:right!important}.position-relative{position:relative!important}.position-absolute{position:absolute!important}.position-fixed{position:fixed!important}.transition-all{transition:all 0.3s ease-in-out}.animate-fade{animation:fadeIn 0.3s ease-in-out}.mt-auto{margin-top:auto}.mb-auto{margin-bottom:auto}.ml-auto{margin-left:auto}.mr-auto{margin-right:auto}.no-select{user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.hardware-accelerate,.optimized-animate{transform:translateZ(0);backface-visibility:hidden}.link-area{padding:0.5rem;margin:-0.5rem;-webkit-tap-highlight-color:transparent}.tool-content{opacity:0;transition:opacity var(--transition-normal)}.tool-content.visible{opacity:1}@keyframes progress{0%{width:0}100%{width:100%}}@keyframes flash{0%,100%{opacity:1}50%{opacity:0.5}}.flash-success{animation:flash 0.5s ease-in-out;background-color:#dcfce7!important}@media (max-width:768px){.container{padding:0 0.5rem}.hide-mobile{display:none!important}.hover-scale{-webkit-tap-highlight-color:transparent}.hover-scale:active{transform:scale(0.98);transition:transform var(--transition-fast)}*{box-shadow:none!important;text-shadow:none!important}.tool-card{transition:transform var(--transition-fast)}.loading-content{padding:1.5rem}.loading-spinner{width:40px;height:40px}.loading-message{font-size:0.9rem}}@media (min-width:769px){.hide-desktop{display:none!important}}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important;scroll-behavior:auto!important}.loading-spinner{animation-duration:2s}.skeleton-loading{animation:none;background:#f0f0f0}}@media (prefers-contrast:high){.loading-overlay{background-color:rgba(255,255,255,0.9)}.loading-content{border:2px solid #000}.loading-spinner{border-width:3px}}@media (prefers-color-scheme:dark){:root{--loader-bg-color:rgba(17,24,39,0.8);--loader-text-color:#f3f4f6;--loader-spinner-bg:#374151}.loading-content{background-color:#1f2937;color:#f3f4f6;box-shadow:0 10px 25px rgba(0,0,0,0.3)}.skeleton-loading{background:linear-gradient(90deg,#2d3748 25%,#374151 50%,#2d3748 75%)}}.click-indicator{position:relative;display:inline-flex;align-items:center;justify-content:center;animation:bounce 2s infinite}.click-indicator i{font-size:1.5rem;color:rgba(255,255,255,0.9);filter:drop-shadow(0 2px 4px rgba(0,0,0,0.2))}.click-indicator::before{content:'';position:absolute;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,0.3);animation:pulse 2s infinite;z-index:-1}@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%{transform:scale(0.8);opacity:1}50%{transform:scale(1.2);opacity:0.5}100%{transform:scale(0.8);opacity:1}}