/* 全部使用英文注释和类名，避免编码问题 */

/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --success: #4cc9f0;
    --success-dark: #2fb6e3;
    --danger: #f72585;
    --warning: #f8961e;
    --info: #4895ef;
    --dark: #212529;
    --light: #f8f9fa;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --border-radius: 12px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--dark);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Card styles */
.card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    margin-bottom: 30px;
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.logo i {
    font-size: 3rem;
    animation: float 3s ease-in-out infinite;
}

.logo h1 {
    font-size: 2.8rem;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
}

/* URL Input */
.url-input-group {
    display: flex;
    gap: 15px;
    margin: 25px 0;
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.input-wrapper input {
    width: 100%;
    padding: 18px 20px 18px 50px;
    font-size: 16px;
    border: 2px solid var(--gray-light);
    border-radius: var(--border-radius);
    outline: none;
    transition: var(--transition);
    background: var(--light);
}

.input-wrapper input:focus {
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.input-icons {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.button-group {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 18px 30px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: var(--success-dark);
}

.shortcut-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.btn-small {
    padding: 10px 20px;
    background: var(--gray-light);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.btn-small:hover {
    background: var(--gray);
    color: white;
}

/* Examples */
.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.example-card {
    background: var(--light);
    border-radius: 10px;
    padding: 20px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.example-card:hover {
    background: white;
    border-color: var(--primary);
    transform: translateX(5px);
}

.example-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.example-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
}

.example-icon.image { background: var(--primary); }
.example-icon.json { background: var(--success); }
.example-icon.pdf { background: var(--danger); }
.example-icon.xml { background: var(--warning); }

.example-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.example-url {
    font-size: 13px;
    color: var(--gray);
    word-break: break-all;
    margin-top: 8px;
    font-family: 'Courier New', monospace;
}

/* API Info */
.code-block {
    position: relative;
    background: #1a1a2e;
    border-radius: 8px;
    padding: 20px;
    margin: 15px 0;
    overflow-x: auto;
}

.code-block code {
    color: #e2e8f0;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
}

.copy-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 8px 15px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-icon.success { background: linear-gradient(135deg, #4cc9f0, #4361ee); }
.stat-icon.info { background: linear-gradient(135deg, #f8961e, #f72585); }
.stat-icon.warning { background: linear-gradient(135deg, #7209b7, #3a0ca3); }

.stat-content h3 {
    font-size: 1rem;
    color: var(--gray);
    margin-bottom: 5px;
}

.stat-content p {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px 0;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 40px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-links a:hover {
    color: white;
    transform: translateY(-2px);
}

/* Loading Animation */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-content {
    text-align: center;
    color: white;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 20px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--dark);
    color: white;
    padding: 15px 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .logo {
        flex-direction: column;
        gap: 10px;
    }
    
    .logo h1 {
        font-size: 2rem;
    }
    
    .url-input-group {
        flex-direction: column;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
    }
    
    .examples-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
    
    .code-block {
        padding: 15px 10px 15px 15px;
        font-size: 12px;
    }
    
    .header {
        padding: 20px 0;
    }
    
    .card {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .logo h1 {
        font-size: 1.8rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .input-wrapper input {
        padding: 15px 15px 15px 45px;
        font-size: 14px;
    }
    
    .btn {
        padding: 15px 20px;
        font-size: 14px;
    }
}

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

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Utility */
.section-description {
    color: var(--gray);
    margin-bottom: 20px;
}

h2 {
    color: var(--dark);
    margin-bottom: 20px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

h2 i {
    color: var(--primary);
    }