/* ========================================
   首页专用样式文件
   所有样式添加 .index-page 作用域前缀
   ======================================== */

/* ===== 1. 欢迎区域 ===== */
.index-page .hero-section {
    text-align: center;
    padding: 1.5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    /* 性能优化：固定高度防止 CLS */
    min-height: 180px;
    contain: layout;
}

.index-page .hero-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--primary-color);
}

.index-page .hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.index-page .hero-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.index-page .feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.index-page .feature-icon {
    font-size: 1.25rem;
}

/* ===== 2. 工具网格布局 ===== */
.index-page .section-title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.index-page .tools-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

/* ===== 3. 工具卡片样式 ===== */
.index-page .tool-card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    height: 98px;
    min-height: 98px;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    contain: layout style;
}

.index-page .tool-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px -4px rgba(66, 133, 244, 0.2),
                0 4px 8px -2px rgba(66, 133, 244, 0.1);
    border-color: var(--primary-color);
    text-decoration: none;
    color: inherit;
}

.index-page .tool-card:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 卡片背景渐变效果 */
.index-page .tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
                rgba(66, 133, 244, 0.03) 0%,
                rgba(139, 92, 246, 0.03) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.index-page .tool-card:hover::before {
    opacity: 1;
}

/* "点击进入"提示 */
.index-page .tool-card::after {
    content: '点击进入';
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background-color: var(--primary-color);
    color: white;
    padding: 0.375rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.index-page .tool-card:hover::after {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 4. 工具卡片内容 ===== */
.index-page .tool-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.575rem;
}

.index-page .tool-icon {
    font-size: 1.25rem;
    margin-bottom: 0;
    margin-right: 0;
    text-align: left;
    transition: all 0.3s ease;
    color: var(--tool-icon-default);
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
}

.index-page .tool-card:hover .tool-icon {
    transform: scale(1.1);
    color: var(--tool-icon-hover);
}

.index-page .tool-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0;
    color: var(--tool-title-default);
    transition: all 0.3s ease;
    line-height: 1.3;
    display: inline-block;
}

.index-page .tool-card:hover .tool-title {
    background: linear-gradient(135deg, var(--tool-title-gradient-start) 0%, var(--tool-title-gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.index-page .tool-description {
    color: var(--tool-desc-default);
    margin-bottom: 0;
    font-size: 0.8rem;
    line-height: 1.4;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color 0.3s ease;
}

.index-page .tool-card:hover .tool-description {
    color: var(--tool-desc-hover);
}

/* 移除原来的按钮样式 */
.index-page .tool-link {
    display: none;
}

/* ===== 5. 关于我们 ===== */
.index-page .about-section {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.index-page .about-text p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.index-page .about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.index-page .about-feature h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.index-page .about-feature p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.875rem;
}

/* ===== 6. 工具分组样式 ===== */
.index-page .tool-category {
    margin-bottom: 4rem;
}

.index-page .category-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 2rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
    position: relative;
}

.index-page .category-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

/* ===== 7. 搜索框样式 ===== */
.index-page .search-container {
    margin-bottom: 1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.index-page .search-box {
    position: relative;
    display: flex;
    align-items: center;
    background-color: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    overflow: hidden;
}

.index-page .search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.1), var(--shadow-md);
    transform: translateY(-1px);
}

.index-page .search-input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.index-page .search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: none;
    outline: none;
    font-size: 1rem;
    background: transparent;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.index-page .search-input::placeholder {
    color: var(--text-secondary);
    transition: color 0.3s ease;
    font-size: 0.9em;
}

.index-page .search-input:focus::placeholder {
    color: var(--text-tertiary);
    transform: translateY(-1px);
}

.index-page .search-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.index-page .search-box:focus-within + .search-hint {
    opacity: 1;
}

.index-page .search-hint-item {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 6px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: monospace;
}

.index-page .search-hint-key {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 1px 4px;
    font-size: 0.7rem;
    font-weight: 500;
}

.index-page .search-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
    pointer-events: none;
    z-index: 1;
    transition: all 0.3s ease;
}

.index-page .search-box:focus-within .search-icon {
    color: var(--primary-color);
}

.index-page .search-box.searching .search-icon {
    color: var(--primary-color);
    animation: searchSpin 1.5s linear infinite;
}

.index-page .search-box.searching {
    position: relative;
    overflow: hidden;
}

.index-page .search-box.searching::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(66, 133, 244, 0.2), transparent);
    animation: searchLoading 1.5s infinite;
    z-index: 1;
}

.index-page .search-box.clearing {
    animation: clearPulse 0.4s ease-out;
}

.index-page .search-box.clearing .search-input {
    animation: clearShake 0.4s ease-out;
}

.index-page .search-clear {
    position: absolute;
    right: 0.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    opacity: 0.7;
}

.index-page .search-clear:hover {
    background-color: var(--background-color);
    color: var(--text-primary);
    opacity: 1;
    transform: scale(1.1);
}

.index-page .search-results-info {
    margin-top: 0.75rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: all 0.3s ease;
    min-height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.index-page .search-suggestion {
    background: none;
    border: none;
    color: var(--primary-color);
    text-decoration: underline;
    cursor: pointer;
    font-size: 0.875rem;
    margin-left: 0.5rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.index-page .search-suggestion:hover {
    background-color: var(--background-color);
    color: var(--primary-hover);
    text-decoration: none;
    transform: translateY(-1px);
}

.index-page .search-suggestions {
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.index-page .search-suggestions span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.index-page .search-suggestions .search-suggestion {
    margin-left: 0;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    text-decoration: none;
}

.index-page .search-suggestions .search-suggestion:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* 搜索高亮样式 */
.index-page .tool-card.highlight {
    animation: highlightPulse 0.6s ease-in-out;
}

.index-page .tool-card.no-match {
    opacity: 0;
    transform: scale(0.8) translateY(-10px);
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.index-page .tool-card.search-hidden {
    display: none;
}

.index-page .tool-card.highlight {
    border-color: var(--primary-color);
    box-shadow: 0 4px 20px rgba(66, 133, 244, 0.3);
    transform: scale(1.02);
    animation: searchHighlight 0.4s ease-out forwards;
}

.index-page .tool-card.search-match {
    opacity: 1;
    transform: scale(1) translateY(0);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.index-page .tool-card.search-appear {
    animation: searchAppear 0.4s ease-out forwards;
}

.index-page .tool-category.category-hidden {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.index-page .tool-category.category-visible {
    opacity: 1;
    max-height: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.index-page .tool-category.has-matches .category-title {
    color: var(--primary-color);
    position: relative;
}

.index-page .tool-category.has-matches .category-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary-color);
    animation: titleUnderline 0.3s ease-out;
}

.index-page .tool-card[style*="display: none"] {
    opacity: 0;
    transform: scale(0.8);
}

/* ===== 8. 回到顶部按钮 ===== */
.index-page .back-to-top {
    position: fixed;
    right: 30px;
    bottom: 80px;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    z-index: 1000;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
    transform: translateY(100px) scale(0);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.index-page .back-to-top.show {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.index-page .back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.5);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 50%, #f093fb 100%);
}

.index-page .back-to-top:active {
    transform: translateY(-2px) scale(1.05);
}

.index-page .back-to-top .rocket-icon {
    font-size: 28px;
    color: white;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    transition: all 0.3s ease;
}

.index-page .back-to-top:hover .rocket-icon {
    transform: translateY(-2px);
    animation: rocketBounce 0.6s ease-in-out infinite;
}

.index-page .back-to-top::before {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 20px;
    background: linear-gradient(to bottom, rgba(240, 147, 251, 0.8), transparent);
    border-radius: 50%;
    opacity: 0;
    transition: all 0.3s ease;
}

.index-page .back-to-top:hover::before {
    opacity: 1;
    animation: trailPulse 0.8s ease-in-out infinite;
}

.index-page .back-to-top::after {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border: 2px solid transparent;
    border-radius: 50%;
    background: linear-gradient(45deg, rgba(102, 126, 234, 0.5), rgba(240, 147, 251, 0.5));
    background-clip: padding-box;
    opacity: 0;
    transform: scale(1.2);
    transition: all 0.4s ease;
}

.index-page .back-to-top:hover::after {
    opacity: 1;
    transform: scale(1);
    animation: pulseRing 1.5s ease-in-out infinite;
}

.index-page .back-to-top.clicked {
    animation: clickRipple 0.6s ease-out;
}

/* ===== 9. 动画关键帧 ===== */
@keyframes searchLoading {
    0% { left: -100%; }
    100% { left: 100%; }
}

@keyframes highlightPulse {
    0% { transform: scale(1); box-shadow: var(--shadow-md); }
    50% { transform: scale(1.02); box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.1), var(--shadow-md); }
    100% { transform: scale(1); box-shadow: var(--shadow-md); }
}

@keyframes searchHighlight {
    0% { box-shadow: 0 0 0 0 rgba(66, 133, 244, 0.7); transform: scale(1); }
    50% { box-shadow: 0 0 0 8px rgba(66, 133, 244, 0.2); transform: scale(1.05); }
    100% { box-shadow: 0 4px 12px rgba(66, 133, 244, 0.2); transform: scale(1); }
}

@keyframes searchAppear {
    0% { opacity: 0; transform: scale(0.8) translateY(30px); }
    60% { opacity: 1; transform: scale(1.02) translateY(-5px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes slideIn {
    0% { opacity: 0; transform: translateY(-10px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes clearPulse {
    0% { border-color: var(--border-color); box-shadow: 0 0 0 0 rgba(66, 133, 244, 0.4); }
    50% { border-color: var(--primary-color); box-shadow: 0 0 0 8px rgba(66, 133, 244, 0.1); }
    100% { border-color: var(--border-color); box-shadow: 0 0 0 0 rgba(66, 133, 244, 0); }
}

@keyframes clearShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-2px); }
    75% { transform: translateX(2px); }
}

@keyframes searchSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes titleUnderline {
    0% { width: 0; }
    100% { width: 30px; }
}

@keyframes rocketBounce {
    0%, 100% { transform: translateY(-2px); }
    50% { transform: translateY(-6px); }
}

@keyframes trailPulse {
    0%, 100% { height: 20px; opacity: 0.8; }
    50% { height: 30px; opacity: 0.4; }
}

@keyframes pulseRing {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

@keyframes clickRipple {
    0% { box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3), 0 0 0 0 rgba(102, 126, 234, 0.7); }
    70% { box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3), 0 0 0 20px rgba(102, 126, 234, 0); }
    100% { box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3), 0 0 0 0 rgba(102, 126, 234, 0); }
}

/* ===== 10. 响应式设计 ===== */
@media (max-width: 1200px) {
    .index-page .tools-container {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 1024px) {
    .index-page .tools-container {
        grid-template-columns: repeat(3, 1fr);
    }

    .index-page .tool-category {
        margin-bottom: 3rem;
    }

    .index-page .category-title {
        font-size: 1.25rem;
        margin-bottom: 1.5rem;
    }
}

@media (max-width: 768px) {
    .index-page .hero-title {
        font-size: 1.75rem;
    }

    .index-page .hero-subtitle {
        font-size: 1rem;
    }

    .index-page .hero-features {
        flex-direction: column;
        gap: 1rem;
    }

    .index-page .tools-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .index-page .tool-card {
        height: 200px;
    }

    .index-page .about-features {
        grid-template-columns: 1fr;
    }

    .index-page .search-container {
        margin-bottom: 1.5rem;
    }

    .index-page .search-input {
        padding: 0.875rem 0.875rem 0.875rem 2.5rem;
        font-size: 0.875rem;
    }

    .index-page .search-icon {
        left: 0.875rem;
    }

    .index-page .search-icon svg {
        width: 18px;
        height: 18px;
    }

    .index-page .search-clear {
        right: 0.25rem;
        width: 1.75rem;
        height: 1.75rem;
        font-size: 1.125rem;
    }

    .index-page .back-to-top {
        right: 20px;
        bottom: 60px;
        width: 56px;
        height: 56px;
    }

    .index-page .back-to-top .rocket-icon {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .index-page .hero-section {
        padding: 2rem 0;
    }

    .index-page .tool-card {
        padding: 1rem;
        height: 200px;
    }

    .index-page .about-section {
        padding: 1.5rem;
    }

    .index-page .tools-container {
        grid-template-columns: 1fr;
    }

    .index-page .search-input {
        padding: 0.75rem 0.75rem 0.75rem 2.25rem;
        font-size: 0.875rem;
    }

    .index-page .search-icon {
        left: 0.75rem;
    }

    .index-page .search-icon svg {
        width: 16px;
        height: 16px;
    }

    .index-page .search-clear {
        right: 0.25rem;
        width: 1.5rem;
        height: 1.5rem;
        font-size: 1rem;
    }

    .index-page .search-results-info {
        font-size: 0.75rem;
        flex-direction: column;
        gap: 0.25rem;
    }

    .index-page .back-to-top {
        right: 15px;
        bottom: 50px;
        width: 50px;
        height: 50px;
    }

    .index-page .back-to-top .rocket-icon {
        font-size: 20px;
    }
}

/* ===== 11. 最近使用区域样式 ===== */
.index-page .recent-tools-section {
    background: linear-gradient(135deg, #fff9f0 0%, #fff5e6 100%);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 2px dashed var(--border-color);
    animation: fadeInDown 0.5s ease-out;
}

.index-page .category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.index-page .recent-tools-section .category-title {
    margin-bottom: 0;
    border-bottom: none;
    padding-bottom: 0;
    color: #d97706;
}

.index-page .recent-tools-section .category-title::after {
    display: none;
}

.index-page .clear-recent-btn {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.index-page .clear-recent-btn:hover {
    background-color: var(--error-color);
    color: white;
    border-color: var(--error-color);
    transform: translateY(-1px);
}

.index-page .recent-tools-section .tools-container {
    margin-bottom: 0;
}

.index-page .recent-tools-section .tool-card {
    position: relative;
}

.index-page .recent-tools-section .tool-card::before {
    content: '⏱️';
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 1rem;
    opacity: 0.5;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .index-page .recent-tools-section {
        padding: 1rem;
    }

    .index-page .category-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .index-page .clear-recent-btn {
        width: 100%;
        text-align: center;
    }
}