/*
* Prefixed by https://autoprefixer.github.io
* PostCSS: v8.4.14,
* Autoprefixer: v10.4.7
* Browsers: last 4 version
*/

/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
}

:root {
    /* 清新现代配色 */
    --primary-color: #6366f1;
    --primary-hover: #5b21b6;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --success-color: #06d6a0;
    --warning-color: #fbbf24;
    --error-color: #f87171;
    --background-gradient: linear-gradient(135deg, #f0f9ff 0%, #e0e7ff 50%, #f3e8ff 100%);
    --surface-gradient: linear-gradient(135deg, #ffffff 0%, #fafbff 100%);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --shadow-soft: 0 4px 20px rgba(99, 102, 241, 0.1);
    --shadow-hover: 0 8px 30px rgba(99, 102, 241, 0.15);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.2);
    --border-radius: 1rem;
    --border-radius-sm: 0.75rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background-gradient);
    min-height: 100vh;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        -o-radial-gradient(20% 80%, circle, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        -o-radial-gradient(80% 20%, circle, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        -o-radial-gradient(40% 40%, circle, rgba(236, 72, 153, 0.05) 0%, transparent 50%);
    background: 
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(236, 72, 153, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}
a{
    text-decoration: none;
    color: var(--text-primary);
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
    font-weight: 500;
}
a:hover{
    color: var(--primary-color);
}
a::after{
    content: '↗';
}
.app-subtitle a{
    color: #fff;
}
/* 头部样式 */
.app-header {
    background: -o-linear-gradient(315deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    color: white;
    padding: 3rem 1rem;
    text-align: center;
    -webkit-box-shadow: var(--shadow-soft);
            box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.app-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: -o-linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    -webkit-animation: shimmer 3s infinite;
            animation: shimmer 3s infinite;
}

@-webkit-keyframes shimmer {
    0% { -webkit-transform: translateX(-100%) translateY(-100%) rotate(45deg); transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { -webkit-transform: translateX(100%) translateY(100%) rotate(45deg); transform: translateX(100%) translateY(100%) rotate(45deg); }
}

@keyframes shimmer {
    0% { -webkit-transform: translateX(-100%) translateY(-100%) rotate(45deg); transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { -webkit-transform: translateX(100%) translateY(100%) rotate(45deg); transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.app-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: -o-linear-gradient(315deg, #ffffff, #f0f9ff);
    background: linear-gradient(135deg, #ffffff, #f0f9ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

.emoji {
    margin-right: 0.5rem;
    display: inline-block;
    -webkit-animation: bounce 2s infinite;
            animation: bounce 2s infinite;
}

@-webkit-keyframes bounce {
    0%, 20%, 50%, 80%, 100% { -webkit-transform: translateY(0); transform: translateY(0); }
    40% { -webkit-transform: translateY(-10px); transform: translateY(-10px); }
    60% { -webkit-transform: translateY(-5px); transform: translateY(-5px); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { -webkit-transform: translateY(0); transform: translateY(0); }
    40% { -webkit-transform: translateY(-10px); transform: translateY(-10px); }
    60% { -webkit-transform: translateY(-5px); transform: translateY(-5px); }
}

.app-subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
    -webkit-animation: fadeInUp 0.8s ease-out;
            animation: fadeInUp 0.8s ease-out;
}

@-webkit-keyframes fadeInUp {
    from {
        opacity: 0;
        -webkit-transform: translateY(20px);
                transform: translateY(20px);
    }
    to {
        opacity: 0.95;
        -webkit-transform: translateY(0);
                transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        -webkit-transform: translateY(20px);
                transform: translateY(20px);
    }
    to {
        opacity: 0.95;
        -webkit-transform: translateY(0);
                transform: translateY(0);
    }
}

/* 主容器 */
.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
    -webkit-box-flex: 1;
        -ms-flex: 1;
            flex: 1;
    position: relative;
}

/* 警告横幅 */
.warning-banner {
    background: -o-linear-gradient(315deg, rgba(251, 191, 36, 0.1), rgba(245, 158, 11, 0.1));
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(245, 158, 11, 0.1));
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    color: #92400e;
    -webkit-box-shadow: var(--shadow-soft);
            box-shadow: var(--shadow-soft);
    -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
    -webkit-animation: slideIn 0.6s ease-out;
            animation: slideIn 0.6s ease-out;
    position: relative;
    overflow: hidden;
}


.warning-banner strong {
    color: #b45309;
    font-weight: 600;
}

@-webkit-keyframes slideIn {
    from {
        opacity: 0;
        -webkit-transform: translateX(-20px);
                transform: translateX(-20px);
    }
    to {
        opacity: 1;
        -webkit-transform: translateX(0);
                transform: translateX(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        -webkit-transform: translateX(-20px);
                transform: translateX(-20px);
    }
    to {
        opacity: 1;
        -webkit-transform: translateX(0);
                transform: translateX(0);
    }
}

/* 区块样式 */
section {
    background: var(--surface-gradient);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    -webkit-box-shadow: var(--shadow-soft);
            box-shadow: var(--shadow-soft);
    -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
    position: relative;
}

section:hover {
    -webkit-transform: translateY(-2px);
        -ms-transform: translateY(-2px);
            transform: translateY(-2px);
    -webkit-box-shadow: var(--shadow-hover);
            box-shadow: var(--shadow-hover);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    background: -o-linear-gradient(315deg, var(--primary-color), var(--secondary-color));
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}



@-webkit-keyframes expandWidth {
    from { width: 0; }
    to { width: 50px; }
}



@keyframes expandWidth {
    from { width: 0; }
    to { width: 50px; }
}

/* 上传区域 */
.upload-section {
    text-align: center;
}

.upload-label {
    display: inline-block;
    cursor: pointer;
    padding: 3rem 2rem;
    border: 2px dashed rgba(99, 102, 241, 0.3);
    border-radius: var(--border-radius);
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
    background: var(--glass-bg);
    width: 100%;
    max-width: 400px;
    -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.upload-label::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: -o-linear-gradient(315deg, transparent, rgba(99, 102, 241, 0.05), transparent);
    background: linear-gradient(135deg, transparent, rgba(99, 102, 241, 0.05), transparent);
    opacity: 0;
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
}

.upload-label:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    -webkit-transform: translateY(-2px);
        -ms-transform: translateY(-2px);
            transform: translateY(-2px);
    -webkit-box-shadow: var(--shadow-glow);
            box-shadow: var(--shadow-glow);
}

.upload-label:hover::before {
    opacity: 1;
}

.upload-label:active {
    -webkit-transform: translateY(0);
        -ms-transform: translateY(0);
            transform: translateY(0);
}

.upload-icon {
    display: block;
    font-size: 3.5rem;
    margin-bottom: 1rem;
    -webkit-animation: float 3s ease-in-out infinite;
            animation: float 3s ease-in-out infinite;
}

@-webkit-keyframes float {
    0%, 100% { -webkit-transform: translateY(0px); transform: translateY(0px); }
    50% { -webkit-transform: translateY(-10px); transform: translateY(-10px); }
}

@keyframes float {
    0%, 100% { -webkit-transform: translateY(0px); transform: translateY(0px); }
    50% { -webkit-transform: translateY(-10px); transform: translateY(-10px); }
}

.file-input {
    display: none;
}

.help-text {
    display: block;
    margin-top: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* 密码区域 */
.password-section {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    gap: 1rem;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
}

.password-label {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    font-weight: 600;
    white-space: nowrap;
    color: var(--text-primary);
}

.password-icon {
    margin-right: 0.5rem;
    -webkit-animation: pulse 2s infinite;
            animation: pulse 2s infinite;
}

.password-input {
    -webkit-box-flex: 1;
        -ms-flex: 1;
            flex: 1;
    min-width: 200px;
    padding: 1rem;
    border: 2px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--border-radius);
    font-size: 1rem;
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
}

.password-input:focus {
    outline: none;
    border-color: var(--primary-color);
    -webkit-box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
    -webkit-transform: translateY(-1px);
        -ms-transform: translateY(-1px);
            transform: translateY(-1px);
}

.password-input::-webkit-input-placeholder {
    color: var(--text-muted);
    -webkit-transition: var(--transition);
    transition: var(--transition);
}

.password-input::-moz-placeholder {
    color: var(--text-muted);
    -moz-transition: var(--transition);
    transition: var(--transition);
}

.password-input:-ms-input-placeholder {
    color: var(--text-muted);
    -ms-transition: var(--transition);
    transition: var(--transition);
}

.password-input::-ms-input-placeholder {
    color: var(--text-muted);
    -ms-transition: var(--transition);
    transition: var(--transition);
}

.password-input::placeholder {
    color: var(--text-muted);
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
}

.password-input:focus::-webkit-input-placeholder {
    opacity: 0.5;
}

.password-input:focus::-moz-placeholder {
    opacity: 0.5;
}

.password-input:focus:-ms-input-placeholder {
    opacity: 0.5;
}

.password-input:focus::-ms-input-placeholder {
    opacity: 0.5;
}

.password-input:focus::placeholder {
    opacity: 0.5;
}

/* 预览区域 */
.preview-section {
    text-align: center;
}

.canvas-container {
    position: relative;
    display: inline-block;
    max-width: 100%;
    border-radius: var(--border-radius);
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-soft);
            box-shadow: var(--shadow-soft);
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
}

.canvas-container:hover {
    -webkit-transform: scale(1.02);
        -ms-transform: scale(1.02);
            transform: scale(1.02);
    -webkit-box-shadow: var(--shadow-hover);
            box-shadow: var(--shadow-hover);
}

.preview-canvas {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    background: var(--surface-gradient);
    display: block;
    margin: 0 auto;
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
    -webkit-filter: drop-shadow(0 4px 10px rgba(0,0,0,0.1));
            filter: drop-shadow(0 4px 10px rgba(0,0,0,0.1));
}

.preview-canvas:hover {
    -webkit-filter: drop-shadow(0 8px 20px rgba(0,0,0,0.15));
            filter: drop-shadow(0 8px 20px rgba(0,0,0,0.15));
}

.placeholder-message {
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
        -ms-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-secondary);
    pointer-events: none;
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
}

.canvas-container:hover .placeholder-message {
    opacity: 0.8;
}

.placeholder-icon {
    font-size: 4.5rem;
    display: block;
    margin-bottom: 1rem;
    opacity: 0.7;
    -webkit-animation: pulse 2s infinite;
            animation: pulse 2s infinite;
}

/* 按钮区域 */
.actions-section {
    text-align: center;
}

.button-group {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 1.5rem;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
}

.action-btn {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    -webkit-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
    min-width: 160px;
    position: relative;
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-soft);
            box-shadow: var(--shadow-soft);
    -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: -webkit-gradient(linear, left top, right top, from(transparent), color-stop(rgba(255,255,255,0.2)), to(transparent));
    background: -o-linear-gradient(left, transparent, rgba(255,255,255,0.2), transparent);
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    -webkit-transition: left 0.5s ease;
    -o-transition: left 0.5s ease;
    transition: left 0.5s ease;
}

.action-btn:hover::before {
    left: 100%;
}

.encrypt-btn {
    background: -o-linear-gradient(315deg, var(--primary-color), var(--secondary-color));
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.encrypt-btn:hover:not(:disabled) {
    background: -o-linear-gradient(315deg, var(--primary-hover), var(--secondary-color));
    background: linear-gradient(135deg, var(--primary-hover), var(--secondary-color));
    -webkit-transform: translateY(-3px);
        -ms-transform: translateY(-3px);
            transform: translateY(-3px);
    -webkit-box-shadow: var(--shadow-hover);
            box-shadow: var(--shadow-hover);
}

.decrypt-btn {
    background: -o-linear-gradient(315deg, var(--success-color), #06d6a0);
    background: linear-gradient(135deg, var(--success-color), #06d6a0);
    color: white;
}

.decrypt-btn:hover:not(:disabled) {
    background: -o-linear-gradient(315deg, #059669, #06d6a0);
    background: linear-gradient(135deg, #059669, #06d6a0);
    -webkit-transform: translateY(-3px);
        -ms-transform: translateY(-3px);
            transform: translateY(-3px);
    -webkit-box-shadow: var(--shadow-hover);
            box-shadow: var(--shadow-hover);
}

.download-btn {
    background: -o-linear-gradient(315deg, var(--warning-color), #fbbf24);
    background: linear-gradient(135deg, var(--warning-color), #fbbf24);
    color: white;
}

.download-btn:hover:not(:disabled) {
    background: -o-linear-gradient(315deg, #d97706, #fbbf24);
    background: linear-gradient(135deg, #d97706, #fbbf24);
    -webkit-transform: translateY(-3px);
        -ms-transform: translateY(-3px);
            transform: translateY(-3px);
    -webkit-box-shadow: var(--shadow-hover);
            box-shadow: var(--shadow-hover);
}

.action-btn:active:not(:disabled) {
    -webkit-transform: translateY(-1px);
        -ms-transform: translateY(-1px);
            transform: translateY(-1px);
}

.action-btn:disabled {
    background: -o-linear-gradient(315deg, #e2e8f0, #cbd5e1);
    background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
    cursor: not-allowed;
    opacity: 0.6;
    -webkit-transform: none;
        -ms-transform: none;
            transform: none;
}

.btn-icon {
    font-size: 1.3rem;
    -webkit-animation: pulse 2s infinite;
            animation: pulse 2s infinite;
}

.action-btn:hover .btn-icon {
    -webkit-animation: shake 0.5s ease-in-out;
            animation: shake 0.5s ease-in-out;
}

@-webkit-keyframes shake {
    0%, 100% { -webkit-transform: translateX(0); transform: translateX(0); }
    25% { -webkit-transform: translateX(-3px); transform: translateX(-3px); }
    75% { -webkit-transform: translateX(3px); transform: translateX(3px); }
}

@keyframes shake {
    0%, 100% { -webkit-transform: translateX(0); transform: translateX(0); }
    25% { -webkit-transform: translateX(-3px); transform: translateX(-3px); }
    75% { -webkit-transform: translateX(3px); transform: translateX(3px); }
}

/* 进度条 */
.progress-container {
    text-align: center;
    margin: 2rem 0;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 1rem;
    position: relative;
    -webkit-box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
            box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

.progress-fill {
    height: 100%;
    background: -webkit-gradient(linear, 
        left top, right top, 
        from(var(--primary-color)), 
        color-stop(var(--accent-color)), 
        to(var(--success-color)));
    background: -o-linear-gradient(left, 
        var(--primary-color), 
        var(--accent-color), 
        var(--success-color));
    background: linear-gradient(90deg, 
        var(--primary-color), 
        var(--accent-color), 
        var(--success-color));
    width: 0%;
    -webkit-transition: width 0.3s ease;
    -o-transition: width 0.3s ease;
    transition: width 0.3s ease;
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.progress-fill::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: -webkit-gradient(linear, 
        left top, right top, 
        from(transparent), 
        color-stop(rgba(255,255,255,0.3)), 
        to(transparent));
    background: -o-linear-gradient(left, 
        transparent, 
        rgba(255,255,255,0.3), 
        transparent);
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255,255,255,0.3), 
        transparent);
    -webkit-animation: progress-shine 1.5s infinite;
            animation: progress-shine 1.5s infinite;
}

@-webkit-keyframes progress-shine {
    0% { -webkit-transform: translateX(-100%); transform: translateX(-100%); }
    100% { -webkit-transform: translateX(100%); transform: translateX(100%); }
}

@keyframes progress-shine {
    0% { -webkit-transform: translateX(-100%); transform: translateX(-100%); }
    100% { -webkit-transform: translateX(100%); transform: translateX(100%); }
}

.progress-text {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    -webkit-animation: pulse 2s infinite;
            animation: pulse 2s infinite;
    background: -o-linear-gradient(315deg, var(--primary-color), var(--accent-color));
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@-webkit-keyframes pulse {
    0%, 100% { 
        opacity: 0.8;
        -webkit-transform: scale(1);
                transform: scale(1);
    }
    50% { 
        opacity: 1;
        -webkit-transform: scale(1.05);
                transform: scale(1.05);
    }
}

@keyframes pulse {
    0%, 100% { 
        opacity: 0.8;
        -webkit-transform: scale(1);
                transform: scale(1);
    }
    50% { 
        opacity: 1;
        -webkit-transform: scale(1.05);
                transform: scale(1.05);
    }
}

/* 页脚 */
.app-footer {
    background: var(--glass-bg);
    border-top: 1px solid rgba(99, 102, 241, 0.1);
    padding: 1.5rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: auto;
    -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .app-container {
        padding: 1rem;
    }
    
    .app-title {
        font-size: 2rem;
    }
    
    .password-section {
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-direction: column;
                flex-direction: column;
        -webkit-box-align: stretch;
            -ms-flex-align: stretch;
                align-items: stretch;
    }
    
    .password-input {
        min-width: auto;
    }
    
    .button-group {
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-direction: column;
                flex-direction: column;
        gap: 1rem;
    }
    
    .action-btn {
        width: 100%;
        -webkit-box-pack: center;
            -ms-flex-pack: center;
                justify-content: center;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: 2rem 1rem;
    }
    
    .app-title {
        font-size: 1.8rem;
    }
    
    section {
        padding: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .upload-label {
        padding: 2rem;
    }
}

/* 全局动画效果 */
@-webkit-keyframes fadeIn {
    from {
        opacity: 0;
        -webkit-transform: translateY(20px);
                transform: translateY(20px);
    }
    to {
        opacity: 1;
        -webkit-transform: translateY(0);
                transform: translateY(0);
    }
}
@keyframes fadeIn {
    from {
        opacity: 0;
        -webkit-transform: translateY(20px);
                transform: translateY(20px);
    }
    to {
        opacity: 1;
        -webkit-transform: translateY(0);
                transform: translateY(0);
    }
}

@-webkit-keyframes slideUp {
    from {
        opacity: 0;
        -webkit-transform: translateY(30px);
                transform: translateY(30px);
    }
    to {
        opacity: 1;
        -webkit-transform: translateY(0);
                transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        -webkit-transform: translateY(30px);
                transform: translateY(30px);
    }
    to {
        opacity: 1;
        -webkit-transform: translateY(0);
                transform: translateY(0);
    }
}

@-webkit-keyframes scaleIn {
    from {
        opacity: 0;
        -webkit-transform: scale(0.9);
                transform: scale(0.9);
    }
    to {
        opacity: 1;
        -webkit-transform: scale(1);
                transform: scale(1);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        -webkit-transform: scale(0.9);
                transform: scale(0.9);
    }
    to {
        opacity: 1;
        -webkit-transform: scale(1);
                transform: scale(1);
    }
}

/* 为所有元素添加延迟动画 */
section {
    -webkit-animation: slideUp 0.6s ease-out;
            animation: slideUp 0.6s ease-out;
}

section:nth-child(1) { -webkit-animation-delay: 0.1s; animation-delay: 0.1s; }
section:nth-child(2) { -webkit-animation-delay: 0.2s; animation-delay: 0.2s; }
section:nth-child(3) { -webkit-animation-delay: 0.3s; animation-delay: 0.3s; }
section:nth-child(4) { -webkit-animation-delay: 0.4s; animation-delay: 0.4s; }

/* 加载状态 */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: -webkit-gradient(linear, left top, right top, from(transparent), color-stop(rgba(255,255,255,0.4)), to(transparent));
    background: -o-linear-gradient(left, transparent, rgba(255,255,255,0.4), transparent);
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    -webkit-animation: loading 1.5s infinite;
            animation: loading 1.5s infinite;
}
.hidden {
    display: none;
}
@-webkit-keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}