/* ===================================
   CSS变量定义
   =================================== */
:root {
    /* 颜色系统 */
    --color-background: #FFFFFF;
    --color-background-alt: #F8F9FA;
    --color-banner: #FFD700;
    --color-text-primary: #000000;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-link: #0066CC;
    --color-link-hover: #0056B3;
    --color-tag-bg: #E9ECEF;
    --color-tag-text: #495057;
    --color-button: #007BFF;
    --color-button-hover: #0056B3;
    --color-overlay: rgba(0, 0, 0, 0.8);
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-shadow-hover: rgba(0, 0, 0, 0.15);
    
    /* 字体系统 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 
                   'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB',
                   'Helvetica Neue', Arial, sans-serif;
    
    /* 字体大小 */
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 2rem;        /* 32px */
    --font-size-4xl: 2.5rem;      /* 40px */
    
    /* 字重 */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* 间距 */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    --spacing-3xl: 4rem;      /* 64px */
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px var(--color-shadow);
    --shadow-md: 0 4px 8px var(--color-shadow);
    --shadow-lg: 0 10px 20px var(--color-shadow-hover);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-cubic: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 断点 */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
}

/* ===================================
   全局重置
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-link-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    list-style: none;
}

/* ===================================
   顶部横幅 Banner
   =================================== */
.banner {
    background: linear-gradient(135deg, #FFD700 0%, #FFC700 100%);
    padding: var(--spacing-2xl) var(--spacing-md);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.banner-container {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.logo-link {
    display: block;
}

.logo {
    width: 120px;
    height: auto;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
}

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

.banner-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.banner-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
}

.search-container {
    position: relative;
    width: 100%;
    max-width: 600px;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-2xl) var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    border: 2px solid transparent;
    border-radius: var(--radius-xl);
    background-color: var(--color-background);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-button);
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

/* 试一试按钮 - Banana 风格 */
.banner-actions {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.try-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 10px 10px;
    padding: var(--spacing-md) var(--spacing-2xl);
    background: linear-gradient(135deg, #1a1a2e 0%, #2d2d44 100%);
    color: #FFD700;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    text-decoration: none;
    border-radius: 50px;
    box-shadow: 0 8px 25px rgba(26, 26, 46, 0.5), 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: 3px solid #FFD700;
}

.try-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.try-btn > * {
    position: relative;
    z-index: 1;
}

.try-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 40px rgba(255, 215, 0, 0.4), 0 8px 20px rgba(26, 26, 46, 0.3);
    color: #ffffff;
    border-color: #FFD700;
}

.try-btn:hover::before {
    opacity: 1;
}

.try-btn:active {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.3);
}

.try-btn svg {
    transition: transform 0.3s ease;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.try-btn:hover svg {
    transform: rotate(-15deg) scale(1.2);
    filter: drop-shadow(0 2px 4px rgba(26, 26, 46, 0.3));
}

.search-icon {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

/* ===================================
   主内容区 Main Content
   =================================== */
.main-content {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-md);
    min-height: 70vh;
}

.prompts-grid {
    column-count: 5;
    column-gap: var(--spacing-xl);
    animation: fadeIn 0.6s ease;
}

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

/* 提示词卡片 */
.prompt-card {
    background: var(--color-background);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-cubic);
    cursor: pointer;
    position: relative;
    break-inside: avoid;
    margin-bottom: var(--spacing-xl);
    display: inline-block;
    width: 100%;
}

.prompt-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-image-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
    background-color: var(--color-background-alt);
}

.card-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.prompt-card:hover .card-image {
    transform: scale(1.1);
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.prompt-card:hover .card-overlay {
    opacity: 1;
}

.view-details {
    color: var(--color-background);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    transform: scale(0.9);
    transition: all var(--transition-fast);
}

.prompt-card:hover .view-details {
    transform: scale(1);
}

.card-info {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    line-height: 1.4;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--color-button);
    color: var(--color-background);
    transform: translateY(-2px);
}

/* ===================================
   弹窗详情 Modal
   =================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    padding: var(--spacing-md);
    overflow-y: auto;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    background: var(--color-background);
    border-radius: var(--radius-xl);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.95);
    transition: transform var(--transition-base);
    animation: modalSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active .modal-container {
    transform: scale(1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(30px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    color: var(--color-background);
    font-size: var(--font-size-3xl);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: rotate(90deg);
}

.modal-content {
    display: flex;
    flex-direction: column;
}

.modal-image {
    width: 100%;
    max-height: 500px;
    object-fit: contain;
    background-color: var(--color-background-alt);
}

.modal-info {
    padding: var(--spacing-2xl);
}

.modal-title-link {
    display: block;
    margin-bottom: var(--spacing-md);
}

.modal-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.modal-source {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.modal-source a {
    color: var(--color-link);
    text-decoration: underline;
}

.prompt-section {
    background: var(--color-background-alt);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.prompt-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.prompt-label {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}
.prompt-actions {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.copy-button,
.share-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 999px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.copy-button {
    background: var(--color-button);
    color: var(--color-background);
}

.copy-button:hover {
    background: var(--color-button-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.copy-button:active {
    transform: translateY(0);
    box-shadow: none;
}

.copy-button.copied {
    background: #28a745;
}

.share-button {
    background: #ffffff;
    color: var(--color-button);
    border-color: rgba(0, 123, 255, 0.3);
}

.share-button:hover {
    background: rgba(0, 123, 255, 0.06);
    color: var(--color-button-hover);
    border-color: var(--color-button-hover);
}

.share-button:active {
    transform: translateY(0);
    box-shadow: none;
}

.prompt-text {
    line-height: 1.8;
    color: var(--color-text-secondary);
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* ===================================
   页脚 Footer - 参考 tree456.com
   =================================== */
.footer {
    background: #1a1a2e;
    color: #ffffff;
    margin-top: var(--spacing-3xl);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 60px 20px 40px;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1.5fr 1fr;
    gap: 40px;
}

/* 品牌区域 */
.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-title {
    font-size: 20px;
    font-weight: 600;
    color: #ffffff;
    margin: 0;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin: 0;
}

/* 各个区块 */
.footer-section {
    display: flex;
    flex-direction: column;
}

.footer-section-title {
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
    margin: 0 0 20px 0;
}

/* 快速链接 */
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links li a:hover {
    color: #ffffff;
}

/* 联系方式列表 */
.footer-contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.5;
}

.footer-contact-list li svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact-list li span {
    word-break: break-word;
}

/* 二维码区域 */
.footer-qr {
    display: flex;
    flex-direction: column;
}

.footer-qr-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-qr-img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    background: #ffffff;
    padding: 4px;
}

.footer-qr-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

/* 底部版权区域 */
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px;
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-icp {
    margin-top: 8px !important;
    font-size: 12px !important;
    color: rgba(255, 255, 255, 0.4) !important;
}

/* ===================================
   响应式设计
   =================================== */

/* 超大屏幕 */
@media (min-width: 1600px) {
    .prompts-grid {
        column-count: 6;
    }
}

@media (min-width: 1280px) and (max-width: 1599px) {
    .prompts-grid {
        column-count: 5;
    }
}

/* 平板 */
@media (max-width: 1024px) {
    .banner-title {
        font-size: var(--font-size-3xl);
    }
    
    .prompts-grid {
        column-count: 3;
        column-gap: var(--spacing-lg);
    }
    
    .prompt-card {
        margin-bottom: var(--spacing-lg);
    }
    
    .modal-title {
        font-size: var(--font-size-2xl);
    }
}

/* 手机 */
@media (max-width: 768px) {
    .banner {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .banner-title {
        font-size: var(--font-size-2xl);
    }
    
    .banner-subtitle {
        font-size: var(--font-size-base);
    }
    
    .logo {
        width: 80px;
    }
    
    .main-content {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .prompts-grid {
        column-count: 2;
        column-gap: var(--spacing-md);
    }
    
    .prompt-card {
        margin-bottom: var(--spacing-md);
    }
    
    .card-title {
        font-size: var(--font-size-lg);
    }
    
    .modal-info {
        padding: var(--spacing-lg);
    }
    
    .modal-title {
        font-size: var(--font-size-xl);
    }
    
    .footer-container {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    
    .footer-qr {
        grid-column: span 2;
        align-items: center;
    }
    
    .footer-qr-wrapper {
        flex-direction: row;
        gap: 16px;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .prompts-grid {
        column-count: 1;
    }
    
    .search-container {
        max-width: 100%;
    }
    
    .prompt-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .prompt-actions {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 40px 20px 30px;
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-section {
        text-align: center;
    }
    
    .footer-section-title {
        margin-bottom: 16px;
    }
    
    .footer-links {
        align-items: center;
    }
    
    .footer-contact-list {
        align-items: center;
    }
    
    .footer-contact-list li {
        justify-content: center;
        text-align: center;
    }
    
    .footer-qr {
        grid-column: span 1;
        align-items: center;
    }
    
    .footer-qr-wrapper {
        flex-direction: column;
    }
}

/* ===================================
   辅助工具类
   =================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.no-scroll {
    overflow: hidden;
}

/* 懒加载图片 */
.lazyload {
    opacity: 0;
    transition: opacity 0.5s ease;
    min-height: 150px;
    background: linear-gradient(
        90deg,
        var(--color-background-alt) 25%,
        #e8e8e8 50%,
        var(--color-background-alt) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.lazyload.loaded {
    opacity: 1;
    animation: none;
    background: none;
    min-height: auto;
}

.lazyload.error {
    background: var(--color-background-alt);
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lazyload.error::after {
    content: '图片加载失败';
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* 骨架屏闪烁动画 */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--color-button);
    animation: spin 1s linear infinite;
}

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

/* ===================================
   打印样式
   =================================== */
@media print {
    .banner,
    .search-container,
    .modal-overlay,
    .footer {
        display: none;
    }
    
    .prompt-card {
        break-inside: avoid;
    }
}