:root{--primary-color:#039ee3;--primary-hover:#0271a3;--text-dark:#2c3e50;--text-light:#7f8c8d;--bg-light:#f9fbfd;--bg-white:#ffffff}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'PingFang SC','Microsoft YaHei',sans-serif;line-height:1.6;color:var(--text-dark);overflow-x:hidden}.section-padding{padding:50px 0}h2.section-title{text-align:center;font-size:2.5rem;margin-bottom:50px;position:relative}h2.section-title::after{content:'';display:block;width:60px;height:6px;background-color:var(--primary-color);margin:15px auto 0;border-radius:3px}.btn{display:inline-block!important;padding:12px 35px!important;background-color:var(--primary-color);color:#fff;text-decoration:none;font-weight:700!important;border-radius:30px!important;transition:all .3s ease}.btn:hover{background-color:var(--primary-hover);color:#fff!important;transform:translateY(-2px)}.btn:focus{color:#fff!important}.download-btn .btn-large{font-size:1.2rem!important;display:flex!important;flex-direction:column;align-items:center;width:130px;height:90px;justify-content:space-around;border-radius:15px!important}.hero{background:#fff;display:flex;align-items:center;position:relative;border-radius:10px;padding:20px}.hero-content{display:flex;align-items:center;justify-content:space-between}.hero-text{flex:1;padding-right:20px}.hero-text h1{font-size:3.5rem;margin-bottom:20px;line-height:1.2}.brand-name{color:var(--primary-color);position:relative;display:inline-block;top:5px;right:5px}.brand-name::before{content:'';position:absolute;z-index:-1;top:-10%;left:-5%;width:110%;height:120%;background:rgba(255,193,7,.2);filter:blur(20px);border-radius:50%}.hero-text p{font-size:1.25rem;color:var(--text-light)}.hero-image{flex:1;text-align:center;width:500px}.mockup-placeholder{width:100%;max-width:600px;height:300px;background-repeat:no-repeat;background-position:center;background-size:cover;border-radius:15px;box-shadow:0 20px 40px rgba(0,0,0,.1);display:flex;justify-content:center;align-items:center;color:#99a;font-weight:700;border:8px solid #fff}#duckduck_preview img{width:100%;height:100%;object-fit:cover}.features{background-color:var(--bg-light);padding:15px}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:15px}.feature-card{background:var(--bg-white);padding:40px;border-radius:20px;text-align:center;box-shadow:0 10px 30px rgba(0,0,0,.05);transition:transform .3s ease}.feature-card:hover{transform:translateY(-10px)!important}.feature-icon{font-size:5rem;display:inline-block;border-radius:10px;color:var(--primary-hover)}.feature-card h3{font-size:1.5rem;margin-bottom:15px}.feature-card p{color:var(--text-light)}.scroll-hidden{opacity:0;transform:translateY(60px) scale(.95);transition:all .3s cubic-bezier(.25, .46, .45, .94)}.scroll-show{opacity:1;transform:translateY(0) scale(1)}.features-grid .feature-card:nth-child(2){transition-delay:0.1s}.features-grid .feature-card:nth-child(3){transition-delay:0.1s}.features-grid .feature-card:nth-child(4){transition-delay:0.1s}.features-grid .feature-card:nth-child(5){transition-delay:0.1s}.features-grid .feature-card:nth-child(6){transition-delay:0.1s}.preview{background-color:var(--bg-white);text-align:center;border-radius:10px}.preview-image-box{width:80%;height:500px;margin:50px auto 0;background-color:#eee;border-radius:12px;background-image:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 800 400"><rect fill="%23ddd" width="800" height="400"/><text fill="%23999" font-family="sans-serif" font-size="30" dy="10.5" font-weight="bold" x="50%" y="50%" text-anchor="middle">软件界面预览截图区域</text></svg>');background-size:cover;background-position:center;box-shadow:0 25px 50px -12px rgba(0,0,0,.25)}.copyright{margin-top:60px;font-size:.9rem;color:rgba(255,255,255,.6)}.download-btn{margin:20px 0;display:flex;justify-content:space-evenly;align-items:center;flex-direction:row}.layer-duckduck-download{backdrop-filter:blur(50px) saturate(120%);background-color:rgba(250,250,250,.8)!important}.download-page-title{margin-bottom:15px;color:#666;text-align:center}.update-log{max-height:150px;overflow-y:auto;background:rgba(255,255,255,.3);padding:10px;border-radius:4px;font-size:12px;color:#666;line-height:1.6;text-align:left;white-space:pre-wrap}.update-log-title{font-weight:700;color:#333;margin-bottom:5px;font-size:13px}.windows-download-btn{border-radius:20px!important;height:45px!important;padding:1px 5px!important;display:flex!important;align-items:center;justify-content:center}.mac-download-btn{border-radius:20px!important;flex:1;background-color:#333!important;height:45px!important;padding:0 5px!important;display:flex!important;flex-direction:row;align-items:center;justify-content:center}.duckduck-converter img{cursor:zoom-in}@media (max-width:1220px){.hero-image{width:200px}.mockup-placeholder{height:250px}.download-btn .btn-large{width:100px}.preview-image-box{width:80%!important;height:430px!important}}@media screen and (max-width:991px){.hero-content{width:100%!important}.mockup-placeholder{height:260px}.download-btn .btn-large{width:100px}.preview-image-box{width:90%!important;height:480px!important}}@media screen and (max-width:768px){.hero-image{width:85%!important}.hero-content{flex-direction:column-reverse;text-align:center;padding-top:40px;width:100%}.hero-text{width:100%;padding-right:0}.hero-text h1{font-size:2.5rem}.mockup-placeholder{height:400px}.download-btn .btn-large{width:200px}.preview{width:100%;padding:20px}.preview-image-box{width:100%!important}.feature-card{padding:20px!important}.feature-icon{padding:0 130px!important}.layer-duckduck-download{width:60%!important}.mac-download-btn{margin-left:0!important}}@media screen and (max-width:480px){.hero-image{width:100%!important}.hero-content{flex-direction:column-reverse;text-align:center;padding-top:40px;width:100%}.hero-text{width:100%}.hero-text h1{font-size:2.5rem}.mockup-placeholder{height:260px}.download-btn .btn-large{width:100px}.preview{width:100%;padding:20px}.preview-image-box{width:100%!important;height:250px!important}.feature-card{padding:20px!important}.feature-icon{padding:0 130px!important}.layer-duckduck-download{width:95%!important}.mac-download-btn{margin-left:0!important}}