/* FaviconSEOPro 样式表 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background: #f5f7fa;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    width: 100%;
    margin-bottom: 20px;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
}

.header h1 {
    font-size: 3em;
    margin-bottom: 30px;
}

.header .subtitle {
    font-size: 1.4em;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
    margin-bottom: 15px;
    font-style: italic;
    letter-spacing: 1px;
}

.header p {
    opacity: 0.9;
    font-size: 1.1em;
}

.main {
    padding: 40px;
}

.upload-area {
    border: 3px dashed #667eea;
    border-radius: 10px;
    padding: 40px;
    text-align: center;
    margin-bottom: 30px;
    background: #f8f9ff;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: #764ba2;
    background: #f0f2ff;
}

.upload-area.dragover {
    border-color: #764ba2;
    background: #e8f0ff;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3em;
    color: #667eea;
    margin-bottom: 20px;
}

.upload-text {
    font-size: 1.2em;
    color: #555;
    margin-bottom: 15px;
}

.upload-hint {
    color: #888;
    font-size: 0.9em;
}

#imageInput {
    display: none;
}

.preview-section {
    display: none;
    margin-bottom: 30px;
}

.preview-image {
    max-width: 200px;
    max-height: 200px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.size-section {
    margin-bottom: 40px;
}

.size-section h2 {
    color: #667eea;
    font-size: 1.5em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e0e6ff;
}

.size-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.size-card {
    background: #f8f9ff;
    border: 2px solid #e0e6ff;
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.size-card:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.size-card h3 {
    color: #667eea;
    margin-bottom: 5px;
    font-size: 1em;
}

.size-card p {
    color: #666;
    font-size: 0.8em;
    margin-bottom: 10px;
    min-height: 2.4em;
}

.size-preview {
    width: 100%;
    height: 80px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.size-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.download-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9em;
    transition: transform 0.2s ease;
}

.download-btn:hover {
    transform: scale(1.05);
}

.download-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.download-all {
    text-align: center;
    margin-top: 30px;
}

.download-all-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 30px;
    font-size: 1.1em;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.download-all-btn:hover {
    transform: scale(1.05);
}

.download-all-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

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

/* SEO内容样式 */
.seo-content {
    margin-top: 60px;
    padding: 40px 0;
}

.seo-content section {
    margin-bottom: 50px;
}

.seo-content h2 {
    color: #667eea;
    font-size: 2em;
    margin-bottom: 30px;
    text-align: center;
    border-bottom: 3px solid #e0e6ff;
    padding-bottom: 15px;
}

.seo-content h3 {
    color: #764ba2;
    font-size: 1.3em;
    margin-bottom: 15px;
}

.seo-content p {
    color: #555;
    line-height: 1.8;
    margin-bottom: 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.feature-item {
    background: #f8f9ff;
    padding: 25px 20px;
    border-radius: 15px;
    border: 2px solid #e0e6ff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.1);
}

.size-categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.size-category {
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
    padding: 25px;
    border-radius: 12px;
    border-left: 5px solid #667eea;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.step {
    text-align: center;
    padding: 25px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-top: 4px solid #667eea;
}

.faq-items {
    max-width: 800px;
    margin: 30px auto 0;
}

.faq-item {
    background: white;
    padding: 25px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    border-left: 4px solid #764ba2;
}

.faq-item h3 {
    color: #667eea;
    font-size: 1.1em;
    margin-bottom: 10px;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-logo {
    color: white;
    font-size: 1.5em;
    font-weight: bold;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 30px;
}

.nav-menu li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.nav-menu li a:hover {
    opacity: 0.8;
}

.mobile-menu-btn {
    display: none;
    color: white;
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
}

/* 语言选择器样式 */
.language-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 8px 12px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9em;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.lang-btn .flag {
    font-size: 1.1em;
}

.lang-btn .arrow {
    font-size: 0.8em;
    transition: transform 0.3s ease;
}

.lang-btn.active .arrow {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid #e0e6ff;
    border-radius: 8px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    min-width: 180px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    max-height: 300px;
    overflow-y: auto;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: #333;
    cursor: pointer;
    transition: background-color 0.2s ease;
    font-size: 0.9em;
}

.lang-option:hover {
    background: #f8f9ff;
}

.lang-option:first-child {
    border-radius: 7px 7px 0 0;
}

.lang-option:last-child {
    border-radius: 0 0 7px 7px;
}

.lang-option .flag {
    font-size: 1.1em;
}

.lang-option.active {
    background: #667eea;
    color: white;
}

/* 面包屑导航 */
.breadcrumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 15px 0;
    margin-bottom: -10px;
}

.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    align-items: center;
    margin: 0;
    padding: 0;
    font-size: 0.85em;
    font-weight: 500;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.breadcrumb a:hover {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    text-decoration: none;
    transform: translateY(-1px);
}

.breadcrumb li:not(:last-child)::after {
    content: "→";
    margin: 0 8px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.8em;
}

.breadcrumb li:last-child {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
    padding: 6px 12px;
}

/* Footer样式 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 50px 0 20px;
    margin-top: 60px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3,
.footer-section h4 {
    color: #3498db;
    margin-bottom: 20px;
    font-size: 1.2em;
}

.footer-section p,
.footer-section li {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #3498db;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 20px;
    text-align: center;
    color: #bdc3c7;
    font-size: 0.9em;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .seo-content {
        margin-top: 40px;
        padding: 20px 0;
    }
    
    .seo-content h2 {
        font-size: 1.5em;
    }
    
    .header h1 {
        font-size: 2em;
    }
    
    .header .subtitle {
        font-size: 1.1em;
        letter-spacing: 0.5px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .steps {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .size-categories {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .feature-item,
    .size-category,
    .step,
    .faq-item {
        padding: 20px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-actions {
        gap: 10px;
    }
    
    .lang-btn {
        padding: 6px 8px;
        font-size: 0.8em;
    }
    
    .lang-btn .lang-text {
        display: none;
    }
    
    .lang-dropdown {
        min-width: 150px;
        right: -10px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .size-categories {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

/* PWA 安装按钮样式 */
.install-app-btn {
    animation: pulse 2s infinite;
}

.install-app-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4) !important;
}

@keyframes pulse {
    0% {
        box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    }
    50% {
        box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
    }
    100% {
        box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    }
}

/* PWA 启动画面优化 */
@media (display-mode: standalone) {
    .navbar {
        padding-top: env(safe-area-inset-top);
    }
    
    body {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* PWA 全屏模式优化 */
@media (display-mode: fullscreen) {
    .header {
        margin-top: env(safe-area-inset-top);
    }
}

/* PWA 功能展示样式 */
.pwa-feature {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f0ff 100%);
    border: 2px solid #667eea;
    position: relative;
    overflow: hidden;
}

.pwa-feature::before {
    content: "✨ NEW";
    position: absolute;
    top: 10px;
    right: -30px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    padding: 5px 40px;
    font-size: 0.8em;
    font-weight: bold;
    transform: rotate(45deg);
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.pwa-actions {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.pwa-install-hint,
.pwa-install-main {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.pwa-install-hint:hover,
.pwa-install-main:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.pwa-status {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

/* PWA Banner 样式 */
.pwa-info {
    margin: 40px 0;
    padding: 0 20px;
}

.pwa-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 30px;
    color: white;
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.pwa-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.pwa-banner-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 30px;
    align-items: center;
}

.pwa-banner-text h3 {
    font-size: 1.8em;
    margin-bottom: 10px;
    font-weight: 600;
}

.pwa-banner-text p {
    font-size: 1.1em;
    opacity: 0.9;
    margin-bottom: 20px;
    line-height: 1.6;
}

.pwa-benefits {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.pwa-benefit {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.pwa-banner-actions {
    text-align: center;
}

.pwa-install-main {
    background: white;
    color: #667eea;
    font-size: 16px;
    padding: 15px 30px;
    margin-bottom: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.pwa-install-main:hover {
    background: #f8f9ff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.pwa-connection-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    opacity: 0.9;
}

.connection-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #4CAF50;
    box-shadow: 0 0 10px rgba(76, 175, 80, 0.6);
    animation: pulse-indicator 2s infinite;
}

.connection-indicator.offline {
    background: #f44336;
    box-shadow: 0 0 10px rgba(244, 67, 54, 0.6);
}

@keyframes pulse-indicator {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

/* Buy Me a Coffee 按钮样式 */
.coffee-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #FFDD44 0%, #FF6B35 100%);
    color: #8B4513;
    text-decoration: none;
    padding: 10px 16px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(255, 221, 68, 0.4);
    border: 2px solid transparent;
}

.coffee-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 221, 68, 0.6);
    border-color: rgba(255, 255, 255, 0.3);
    color: #8B4513;
    text-decoration: none;
}

.coffee-icon {
    font-size: 16px;
    animation: coffee-steam 2s ease-in-out infinite;
}

@keyframes coffee-steam {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

.coffee-text {
    font-weight: 600;
}

/* Footer Coffee Link 样式 */
.coffee-link {
    color: #FFDD44 !important;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.coffee-link:hover {
    color: #FF6B35 !important;
    transform: translateX(3px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .coffee-text {
        display: none;
    }
    
    .coffee-btn {
        padding: 8px 12px;
        font-size: 16px;
    }
    
    .pwa-banner-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .pwa-banner {
        padding: 20px;
        text-align: center;
    }
    
    .pwa-banner-text h3 {
        font-size: 1.5em;
    }
    
    .pwa-benefits {
        justify-content: center;
    }
    
    .pwa-actions {
        justify-content: center;
    }
}