body{font-family:Arial,Helvetica,sans-serif;margin:0;background:#f7f7f7;color:#333;}
.container{width:100%;max-width:1140px;margin:auto;padding:0 15px;}
.header{background:#fff;border-bottom:1px solid #ddd;}
.header-flex{display:flex;justify-content:space-between;align-items:center;padding:15px 0;}
.logo a{font-size:20px;font-weight:700;text-decoration:none;color:#222;}
.nav a{margin-left:18px;text-decoration:none;color:#444;font-size:14px;}
.nav a:hover{color:#e53935;}
.hero{text-align:center;padding:50px 0 30px;}
.hero-title{font-size:36px;margin-bottom:10px;font-weight:600;}
.hero-desc{max-width:700px;margin:auto;font-size:16px;line-height:1.7;color:#555;}
.tool-box{background:#fff;padding:40px;border-radius:8px;border:1px solid #ddd;text-align:center;max-width:1200px;margin:auto;box-shadow:0 4px 40px rgba(0,0,0,0.08);}
.upload-box{border:2px dashed #cfd6e4;padding:20px;border-radius:8px;background:#fafafa;cursor:pointer;margin:15px 0;}
.upload-box:hover{background:#f3f6fb;border-color:#e53935;}
.upload-type-img{width:80px;margin-bottom:8px;}
.upload-text{font-size:15px;color:#555;margin-bottom:10px;}
.select-btn{padding:8px 20px;font-size:14px;}
.convert-btn{margin-top:25px;}
#toastBox{position:fixed;top:20px;right:20px;z-index:9999;}
.toast{background:#28a745;color:#fff;padding:12px 18px;margin-bottom:10px;border-radius:6px;font-size:14px;box-shadow:0 4px 12px rgba(0,0,0,0.2);animation:slideIn 0.3s ease;}
@keyframes slideIn{from{transform:translateX(100%);opacity:0;}to{transform:translateX(0);opacity:1;}}
.features{background:#f9f9f9;padding:40px 0;}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;}
.feature-box{background:#fff;padding:20px;border-radius:6px;border:1px solid #ddd;text-align:center;transition:.25s;}
.feature-box:hover{transform:translateY(-6px);box-shadow:0 8px 18px rgba(0,0,0,0.12);}
.info-section,.how-section,.faq-section{padding:40px 0;text-align:center;}
.info-section p{line-height:1.7;color:#555;}
.btn{display:inline-block;padding:10px 22px;border-radius:5px;border:none;cursor:pointer;font-size:14px;background:#e53935;color:#fff;text-decoration:none;transition:.2s;}
.btn:hover{background:#c62828;}
.btn-success{background:#28a745;color:#fff;}
.btn-success:hover{background:#218838;}
.btn-danger{background:#dc3545;color:#fff;}
.btn-danger:hover{background:#c82333;}
.tool-image-box{text-align:center;margin-top:30px;}
.tool-image{max-width:500px;width:100%;height:auto;border-radius:6px;}
.footer{background:#fff;margin-top:50px;border-top:1px solid #ddd;padding:30px 0;text-align:center;}
.menu-btn{display:none;background:none;border:none;font-size:24px;}
.hero-desc a{color:#e53935;font-weight:600;text-decoration:none;}
.hero-desc a:hover{text-decoration:underline;}
.preview-area{display:flex;gap:10px;padding-left:30px;overflow-x:auto;}
.tool-options{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;margin-top:20px;}
.select-group{display:flex;flex-direction:column;min-width:160px;}
.select-group label{font-size:14px;font-weight:600;margin-bottom:6px;color:#333;}
.tool-select{padding:10px 12px;border:1px solid #ddd;border-radius:6px;background:#fff;font-size:14px;cursor:pointer;transition:all 0.2s ease;}
.tool-select:hover{border-color:#e53935;}
.tool-select:focus{outline:none;border-color:#e53935;box-shadow:0 0 4px rgba(229,57,53,0.3);}
.thumb-box{position:relative;margin:10px;overflow:visible;}
.preview-thumb{width:200px;height:220px;object-fit:cover;border-radius:6px;border:1px solid #ddd;cursor:pointer;}
.thumb-remove{position:absolute;top:6px;right:6px;background:#e53935;color:#FCFF00;width:20px;height:20px;border-radius:50%;font-size:14px;display:flex;align-items:center;justify-content:center;cursor:pointer;}
.clear-btn{background:#dc3545;color:#FCFF00;border:none;padding:6px 12px;border-radius:6px;font-size:14px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:.2s;}
.clear-btn:hover{background:#000;}
.trash-icon::before{content:"🗑 ";font-size:15px;}
.img-modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.85);align-items:center;justify-content:center;z-index:999;}
.modal-content{position:relative;text-align:center;}
.image-wrapper{position:relative;display:inline-block;}
#modalImg{max-width:60%;max-height:60%;border-radius:6px;}
.modal-actions{position:absolute;top:8px;right:8px;display:flex;gap:6px;}
.close-modal{background:#e53935;color:#fff;width:26px;height:26px;border-radius:70%;font-size:16px;display:flex;align-items:center;justify-content:center;cursor:pointer;}
.remove-btn{background:#e53935;color:#fff;border:none;padding:5px 30px;border-radius:5px;cursor:pointer;font-size:12px;}
#fakeLoadingOverlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.85);display:flex;align-items:center;justify-content:center;z-index:9999;color:#fff;}
.loader-box{text-align:center;}
.spinner{width:50px;height:50px;border:5px solid #fff;border-top:5px solid transparent;border-radius:50%;animation:spin 1s linear infinite;margin:auto;margin-bottom:15px;}
@keyframes spin{0%{transform:rotate(0deg);}100%{transform:rotate(360deg);}}
#loadingMessage{font-size:18px;font-weight:600;margin-top:10px;transition:.3s;}
.thumb-rotate{position:absolute;bottom:5px;right:5px;color:red;font-size:18px;cursor:pointer;background:#FFFC00;border-radius:50%;padding:2px 6px;}
.thumb-left,.thumb-right{position:absolute;bottom:10px;background:#FFFC00;border-radius:50%;padding:2px 6px;font-size:14px;cursor:pointer;}
.thumb-left{left:20px;}
.thumb-right{left:calc(20px + 30px);}
.progress-bar-box{width:260px;height:8px;background:#444;border-radius:6px;margin:10px auto;overflow:hidden;}
#progressBar{width:0%;height:100%;background:#4CAF50;transition:width 0.3s ease;}
#progressText{font-size:14px;margin-top:5px;}
.msg-upload{color:#4CAF50;}
.msg-optimize{color:#FF9800;}
.msg-dpi{color:#03A9F4;}
.msg-merge{color:#9C27B0;}
.msg-ready{color:#E91E63;}
#countdown{font-size:20px;font-weight:bold;color:#FFD600;}
.how-section{padding:50px 0;text-align:center;}
.how-section h2{font-size:28px;margin-bottom:30px;}
.how-steps{list-style:none;padding:0;max-width:700px;margin:auto;}
.how-steps li{display:flex;align-items:flex-start;gap:15px;background:#fff;border:1px solid #ddd;border-radius:8px;padding:15px;margin-bottom:12px;text-align:left;transition:.25s;}
.how-steps li:hover{box-shadow:0 5px 15px rgba(0,0,0,0.08);transform:translateY(-2px);}
.how-steps span{background:#e53935;color:#fff;font-weight:bold;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:14px;flex-shrink:0;}
@media(max-width:768px){.menu-btn{display:block;}.nav{display:none;position:absolute;background:#fff;width:100%;left:0;top:60px;border-top:1px solid #ddd;}.nav a{display:block;padding:12px;border-bottom:1px solid #eee;margin:0;}.nav.show{display:block;}.hero-title{font-size:28px;}}