* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.98);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.1);
    padding: 40px 50px;
    position: relative;
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.6s ease-out;
}

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

.site-header {
    max-width: 1100px;
    margin: 0 auto 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    animation: fadeInDown 0.6s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 10px rgba(255, 255, 255, 0.3);
    letter-spacing: 2px;
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, rgba(255,255,255,0.8), transparent);
    border-radius: 2px;
}

.language-switcher {
    display: flex;
    gap: 10px;
    background: rgba(255, 255, 255, 0.15);
    padding: 5px;
    border-radius: 25px;
    backdrop-filter: blur(10px);
}

.lang-btn {
    padding: 8px 20px;
    background: transparent;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.lang-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transition: width 0.4s, height 0.4s, top 0.4s, left 0.4s;
    transform: translate(-50%, -50%);
    z-index: 0;
}

.lang-btn:hover::before {
    width: 150px;
    height: 150px;
}

.lang-btn span {
    position: relative;
    z-index: 1;
}

.lang-btn.active {
    background: rgba(255, 255, 255, 0.95);
    color: #667eea;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.lang-btn:hover:not(.active) {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

h1 {
    text-align: center;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 2.5em;
    font-weight: 800;
    letter-spacing: -0.5px;
}

h2 {
    text-align: center;
    margin-bottom: 35px;
    color: #6b7280;
    font-size: 1.2em;
    font-weight: 400;
}

.alert {
    padding: 20px 25px;
    margin-bottom: 30px;
    border-radius: 12px;
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border: 2px solid #fbbf24;
    color: #92400e;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(251, 191, 36, 0.2);
}

.alert::before {
    content: '⚠️';
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 24px;
    opacity: 0.3;
}

.alert strong {
    display: block;
    margin-bottom: 10px;
    font-size: 1.1em;
    color: #78350f;
}

.alert a {
    font-weight: 600;
    color: #b45309;
    text-decoration: none;
    border-bottom: 2px solid #fbbf24;
    transition: all 0.3s;
}

.alert a:hover {
    color: #92400e;
    border-bottom-color: #92400e;
}

.tabs {
    display: flex;
    margin-bottom: 30px;
    background: #f8fafc;
    border-radius: 12px;
    padding: 5px;
    gap: 5px;
}

.tab-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: #64748b;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.tab-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
}

.tab-btn:hover:not(.active) {
    background: #e2e8f0;
    color: #475569;
}

.tab-content {
    display: none;
    margin-bottom: 20px;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #374151;
    font-size: 15px;
}

textarea, input[type="file"] {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #f9fafb;
}

textarea {
    resize: vertical;
    min-height: 200px;
}

textarea:focus, input[type="file"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    background: white;
    transform: translateY(-1px);
}

/* 自定义滑块样式 */
input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: linear-gradient(to right, #e5e7eb 0%, #e5e7eb 100%);
    outline: none;
    -webkit-appearance: none;
    margin: 10px 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.4);
    transition: all 0.3s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.4);
    transition: all 0.3s;
}

input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transition: width 0.6s, height 0.6s, top 0.6s, left 0.6s;
    transform: translate(-50%, -50%);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 14px;
}

.result {
    margin-top: 35px;
    padding: 25px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 12px;
    border: 2px solid #cbd5e1;
    animation: slideIn 0.5s ease-out;
}

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

.result h2 {
    color: #1e293b;
    margin-bottom: 20px;
    text-align: left;
}

.actions {
    margin-bottom: 20px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 20px;
    border-radius: 10px;
    overflow-x: auto;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    line-height: 1.6;
    max-height: 450px;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3);
    border: 1px solid #334155;
}

#loading, #loading-en {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(102, 126, 234, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

#loading p, #loading-en p {
    color: white;
    font-size: 18px;
    font-weight: 600;
    margin-top: 10px;
}

.spinner {
    width: 70px;
    height: 70px;
    border: 6px solid rgba(255, 255, 255, 0.3);
    border-top: 6px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 错误提示窗口样式 */
.error-notification {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1001;
    animation: fadeIn 0.3s ease-in;
}

.error-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 550px;
    width: 90%;
    text-align: center;
    animation: scaleIn 0.3s ease-out;
}

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

.error-content h3 {
    color: #dc2626;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 24px;
    font-weight: 700;
}

.error-content p {
    margin-bottom: 20px;
    color: #4b5563;
    font-size: 15px;
}

#close-error {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.3);
}

#close-error:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
}

.error-code {
    margin: 20px 0;
    text-align: left;
}

.error-code h4 {
    margin-bottom: 10px;
    color: #dc2626;
    font-size: 16px;
}

.error-code pre {
    background-color: #f9fafb;
    color: #374151;
    padding: 15px;
    border-left: 4px solid #dc2626;
    border-radius: 6px;
    max-height: 200px;
    overflow-y: auto;
    font-size: 12px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px 0;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}

.footer a {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    text-decoration: none;
    transition: all 0.3s;
    margin: 0 10px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.footer a:hover {
    color: white;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* 响应式设计 */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        padding: 25px 20px;
        border-radius: 15px;
    }
    
    .site-header {
        flex-direction: column;
        gap: 15px;
        margin-bottom: 20px;
    }
    
    .logo {
        font-size: 24px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    h2 {
        font-size: 1em;
    }
    
    .tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
    }
    
    .actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .error-content {
        padding: 20px;
    }
}

/* 添加平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    transition: all 0.3s;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}