/* ========== 围棋工具栏目专用样式 ========== */
/* 版本: 1.0.0 | 栏目: 围棋工具 | 作者: 芦笛 */

/* ===== 页面头部微调 ===== */
.tools-page-header {
    min-height: 65vh;
}

/* ===== 工具概览统计区 ===== */
.tools-hero-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(180deg, var(--color-cream) 0%, white 100%);
}

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

.tools-hero-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.tools-hero-stat {
    text-align: center;
    padding: var(--space-lg) var(--space-md);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(30, 30, 36, 0.04);
    transition: var(--transition-normal);
}

.tools-hero-stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.stat-number {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700;
    color: var(--color-go-primary);
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    font-weight: 300;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .tools-hero-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .tools-hero-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 核心工具网格区 ===== */
.tools-grid-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

.tools-main-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

@media (max-width: 968px) {
    .tools-main-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 工具详情卡片 ===== */
.tool-detail-card {
    background: var(--color-cream);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid rgba(30, 30, 36, 0.04);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.tool-detail-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-go-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.tool-detail-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.tool-detail-card:hover::before {
    transform: scaleX(1);
}

.tool-detail-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.tool-detail-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-go-primary), var(--color-go-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: white;
    flex-shrink: 0;
}

.tool-detail-title-wrap {
    flex: 1;
    min-width: 0;
}

.tool-detail-name {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: 2px;
    margin-bottom: 2px;
}

.tool-detail-name-en {
    font-size: 0.7rem;
    color: var(--color-warm-gray);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.tool-status {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.tool-status.available {
    background: rgba(74, 124, 111, 0.12);
    color: var(--color-go-accent);
}

.tool-status.beta {
    background: rgba(196, 167, 125, 0.15);
    color: #B8860B;
}

.tool-status.dev {
    background: rgba(142, 127, 127, 0.12);
    color: var(--color-secondary);
}

/* ===== 工具预览区 ===== */
.tool-detail-preview {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, #E8D4A8, #DEB887);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-md);
    cursor: pointer;
}

.tool-detail-preview canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.tool-preview-overlay {
    position: absolute;
    inset: 0;
    background: rgba(30, 30, 36, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-fast);
}

.tool-detail-preview:hover .tool-preview-overlay {
    opacity: 1;
}

.preview-tag {
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.95);
    color: var(--color-dark);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    backdrop-filter: blur(8px);
    letter-spacing: 1px;
}

/* AI预览特殊样式 */
.ai-preview {
    background: linear-gradient(135deg, #2A2A3A, #3A3A4A);
}

.ai-chart-legend {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
}

.legend-item {
    font-size: 0.65rem;
    color: rgba(255,255,255,0.8);
    display: flex;
    align-items: center;
    gap: 4px;
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.legend-dot.black { background: #333; }
.legend-dot.white { background: #ddd; }
.legend-dot.key { background: #E74C3C; }

/* ===== 工具描述与标签 ===== */
.tool-detail-desc {
    font-size: 0.88rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
    font-weight: 300;
}

.tool-detail-features {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--space-sm);
}

.tool-detail-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(90, 109, 123, 0.08);
    color: var(--color-go-primary);
    font-size: 0.75rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.tool-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    padding: var(--space-xs) 0;
    border-top: 1px solid rgba(30, 30, 36, 0.04);
    border-bottom: 1px solid rgba(30, 30, 36, 0.04);
}

.meta-item {
    font-size: 0.78rem;
    color: var(--color-secondary);
    font-weight: 400;
}

.tool-detail-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.9rem;
    color: var(--color-accent);
    font-weight: 500;
    transition: var(--transition-fast);
}

.tool-detail-link:hover {
    gap: 8px;
    color: var(--color-go-primary);
}

/* ===== 辅助工具卡片 ===== */
.tools-aux-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

@media (max-width: 968px) {
    .tools-aux-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .tools-aux-grid {
        grid-template-columns: 1fr;
    }
}

.tool-aux-card {
    background: var(--color-cream);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid rgba(30, 30, 36, 0.04);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.tool-aux-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-go-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.tool-aux-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.tool-aux-card:hover::before {
    transform: scaleX(1);
}

.tool-aux-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-go-light), var(--color-go-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-sm);
    font-size: 1.6rem;
    color: white;
    transition: var(--transition-fast);
}

.tool-aux-card:hover .tool-aux-icon {
    transform: scale(1.1) rotate(-5deg);
}

.tool-aux-name {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 2px;
    letter-spacing: 2px;
}

.tool-aux-name-en {
    font-size: 0.7rem;
    color: var(--color-warm-gray);
    letter-spacing: 1px;
    text-transform: uppercase;
    display: block;
    margin-bottom: var(--space-sm);
}

.tool-aux-desc {
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
    font-weight: 300;
    text-align: left;
}

.tool-aux-features {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    justify-content: center;
    margin-bottom: var(--space-sm);
}

.tool-aux-tag {
    display: inline-block;
    padding: 2px 8px;
    background: rgba(90, 109, 123, 0.08);
    color: var(--color-go-primary);
    font-size: 0.72rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.tool-status-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.tool-aux-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.85rem;
    color: var(--color-accent);
    font-weight: 500;
    transition: var(--transition-fast);
}

.tool-aux-link:hover {
    gap: 8px;
    color: var(--color-go-primary);
}

/* ===== 特色功能展示区 ===== */
.feature-showcase-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(180deg, var(--color-cream) 0%, white 50%, var(--color-cream) 100%);
}

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

.feature-showcase-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.feature-showcase-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.feature-showcase-item.reverse {
    direction: rtl;
}

.feature-showcase-item.reverse > * {
    direction: ltr;
}

@media (max-width: 968px) {
    .feature-showcase-item {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    .feature-showcase-item.reverse {
        direction: ltr;
    }
}

.feature-showcase-visual {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #E8D4A8, #DEB887);
    box-shadow: var(--shadow-md);
}

.feature-showcase-visual canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.feature-showcase-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-md);
    background: linear-gradient(transparent, rgba(30,30,36,0.7));
    color: white;
    font-size: 0.85rem;
    text-align: center;
    font-weight: 300;
}

.feature-showcase-content h4 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: 2px;
}

.feature-showcase-content p {
    font-size: 0.9rem;
    color: var(--color-warm-gray);
    line-height: 1.9;
    margin-bottom: var(--space-md);
    font-weight: 300;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: var(--space-xs);
    font-size: 0.88rem;
    color: var(--color-warm-gray);
    line-height: 1.7;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-go-accent);
    font-weight: 700;
}

/* ===== 使用指南区 ===== */
.guide-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

@media (max-width: 968px) {
    .guide-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .guide-grid {
        grid-template-columns: 1fr;
    }
}

.guide-card {
    background: var(--color-cream);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid rgba(30, 30, 36, 0.04);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.guide-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.guide-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(90, 109, 123, 0.12);
    line-height: 1;
    margin-bottom: var(--space-sm);
    letter-spacing: -1px;
}

.guide-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

.guide-desc {
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.9;
    font-weight: 300;
}

/* ===== 更新日志区 ===== */
.changelog-section {
    padding: var(--space-2xl) var(--space-md);
    background: var(--color-cream);
}

.changelog-container {
    max-width: 800px;
    margin: 0 auto;
}

.changelog-timeline {
    position: relative;
    margin-top: var(--space-lg);
    padding-left: 24px;
}

.changelog-timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent), var(--color-go-light), transparent);
}

.changelog-item {
    position: relative;
    margin-bottom: var(--space-lg);
    padding-left: var(--space-md);
}

.changelog-item::before {
    content: '';
    position: absolute;
    left: -21px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-cream);
    box-shadow: 0 0 0 2px var(--color-accent);
}

.changelog-date {
    font-size: 0.8rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: 1px;
}

.changelog-content h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

.changelog-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.changelog-content li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 4px;
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.7;
    font-weight: 300;
}

.changelog-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-go-accent);
    font-weight: 700;
}

/* ===== 工具提示弹窗 ===== */
.tool-notice-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.tool-notice-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(30, 30, 36, 0.85);
    backdrop-filter: blur(8px);
}

.tool-notice-content {
    position: relative;
    z-index: 1;
    background: var(--color-cream);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 420px;
    width: 90vw;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.tool-notice-modal.active .tool-notice-content {
    transform: translateY(0);
}

.tool-notice-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(30, 30, 36, 0.06);
    color: var(--color-warm-gray);
    font-size: 1.4rem;
    line-height: 1;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tool-notice-close:hover {
    background: rgba(30, 30, 36, 0.12);
    color: var(--color-dark);
}

.tool-notice-icon {
    font-size: 3rem;
    margin-bottom: var(--space-sm);
}

.tool-notice-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    letter-spacing: 2px;
}

.tool-notice-desc {
    font-size: 0.9rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
    font-weight: 300;
}

.tool-notice-actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== 响应式补充 ===== */
@media (max-width: 768px) {
    .tool-detail-header {
        flex-wrap: wrap;
    }

    .tool-detail-meta {
        flex-direction: column;
        gap: 4px;
    }

    .feature-showcase-item.reverse {
        direction: ltr;
    }

    .tool-notice-actions {
        flex-direction: column;
    }

    .tool-notice-actions .btn {
        width: 100%;
    }
}