/* 教程头部 */
.tutorial-header {
    padding: 160px 0 50px;
    background: radial-gradient(ellipse at 50% 100%, #1a1a2e 0%, #0a0a12 70%);
    border-bottom: 1px solid var(--border-color, #2a2a44);
    text-align: center;
}
.tutorial-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}
.tutorial-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary, #b0b0c8);
    max-width: 600px;
    margin: 0 auto 20px;
}
.tutorial-meta {
    display: flex;
    justify-content: center;
    gap: 30px;
    color: var(--text-muted, #70708a);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

/* 教程目录 */
.tutorial-toc {
    background: var(--bg-secondary, #12121e);
    border-bottom: 1px solid var(--border-color, #2a2a44);
    padding: 16px 0;
    position: sticky;
    top: 72px;
    z-index: 100;
    backdrop-filter: blur(8px);
}
.toc-wrapper {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}
.toc-label {
    font-weight: 700;
    color: var(--primary, #00e5ff);
    white-space: nowrap;
}
.toc-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
}
.toc-links a {
    color: var(--text-secondary, #b0b0c8);
    font-size: 0.9rem;
    transition: color 0.3s;
}
.toc-links a:hover {
    color: var(--primary, #00e5ff);
}

/* 教程正文 */
.tutorial-body {
    background: var(--bg-primary, #0a0a12);
    padding: 40px 0 60px;
}
.tutorial-content {
    max-width: 900px;
    margin: 0 auto;
}

/* 教程章节 */
.tutorial-section {
    margin-bottom: 60px;
    position: relative;
    padding-top: 20px;
}
.tutorial-section h2 {
    font-size: 2rem;
    color: #ffffff;
    margin-bottom: 4px;
}
.tutorial-section .step-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary, #00e5ff), #a855f7);
    color: #000;
    font-weight: 700;
    font-size: 0.8rem;
    padding: 4px 16px;
    border-radius: 30px;
    margin-bottom: 16px;
}
.tutorial-section > p {
    color: var(--text-secondary, #b0b0c8);
    font-size: 1.1rem;
    margin-bottom: 24px;
}

/* 教程卡片网格 */
.tutorial-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin: 20px 0;
}
.tutorial-card {
    background: var(--bg-card, #1a1a2e);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--border-color, #2a2a44);
    transition: all 0.3s;
}
.tutorial-card:hover {
    border-color: var(--primary, #00e5ff);
}
.tutorial-card .card-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}
.tutorial-card h4 {
    font-size: 1.1rem;
    color: #ffffff;
    margin-bottom: 12px;
}
.tutorial-card ol,
.tutorial-card ul {
    padding-left: 20px;
    color: var(--text-secondary, #b0b0c8);
    font-size: 0.95rem;
    line-height: 1.8;
}
.tutorial-card ol li,
.tutorial-card ul li {
    margin-bottom: 4px;
}

/* 步骤列表 */
.tutorial-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 16px 0;
}
.step-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: var(--bg-card, #1a1a2e);
    border-radius: 12px;
    padding: 16px 20px;
    border: 1px solid var(--border-color, #2a2a44);
}
.step-num {
    background: linear-gradient(135deg, var(--primary, #00e5ff), #a855f7);
    color: #000;
    font-weight: 800;
    font-size: 1.2rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.step-content h4 {
    font-size: 1.05rem;
    color: #ffffff;
    margin-bottom: 2px;
}
.step-content p {
    color: var(--text-secondary, #b0b0c8);
    font-size: 0.95rem;
    margin: 0;
}

/* 功能设置网格 */
.tutorial-feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 16px 0;
}
.feature-setting {
    background: var(--bg-card, #1a1a2e);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color, #2a2a44);
}
.feature-setting h4 {
    font-size: 1.05rem;
    color: #ffffff;
    margin-bottom: 10px;
}
.feature-setting ul {
    padding-left: 18px;
    color: var(--text-secondary, #b0b0c8);
    font-size: 0.9rem;
    line-height: 1.8;
}
.feature-setting ul li {
    margin-bottom: 2px;
}

/* 提示框 */
.tutorial-tip {
    display: flex;
    gap: 12px;
    background: rgba(0, 229, 255, 0.06);
    border-left: 4px solid var(--primary, #00e5ff);
    border-radius: 8px;
    padding: 16px 20px;
    margin: 20px 0;
}
.tip-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}
.tutorial-tip div {
    color: var(--text-secondary, #b0b0c8);
    font-size: 0.95rem;
}
.tutorial-tip strong {
    color: #ffffff;
}

/* 全宽卡片 */
.tutorial-card.full-width {
    grid-column: 1 / -1;
}

/* 键盘按键 */
kbd {
    background: var(--bg-secondary, #12121e);
    padding: 2px 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color, #2a2a44);
    font-size: 0.85rem;
    color: #ffffff;
}

/* 底部导航 */
.tutorial-bottom-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color, #2a2a44);
    margin-top: 30px;
}
.nav-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.nav-item .nav-label {
    font-size: 0.8rem;
    color: var(--text-muted, #70708a);
}
.nav-item a {
    font-weight: 600;
    color: var(--text-secondary, #b0b0c8);
}
.nav-item a:hover {
    color: var(--primary, #00e5ff);
}
.nav-item .btn-sm {
    padding: 6px 20px;
    font-size: 0.85rem;
}

/* 教程页FAQ（复用已有样式，微调） */
.tutorial-faq .faq-item {
    background: var(--bg-card, #1a1a2e);
    border-radius: 12px;
    border: 1px solid var(--border-color, #2a2a44);
    margin-bottom: 10px;
}
.tutorial-faq .faq-question {
    padding: 14px 20px;
    font-size: 1rem;
}
.tutorial-faq .faq-answer {
    padding: 0 20px 16px;
    font-size: 0.95rem;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .tutorial-header {
        padding: 140px 0 30px;
    }
    .tutorial-title {
        font-size: 2.2rem;
    }
    .tutorial-toc {
        top: 64px;
    }
    .toc-wrapper {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .toc-links {
        gap: 8px 14px;
    }
    .toc-links a {
        font-size: 0.8rem;
    }
    .tutorial-feature-grid {
        grid-template-columns: 1fr;
    }
    .tutorial-cards-grid {
        grid-template-columns: 1fr;
    }
    .tutorial-bottom-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .nav-item {
        align-items: center;
    }
    .tutorial-meta {
        gap: 16px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .tutorial-title {
        font-size: 1.8rem;
    }
    .tutorial-section h2 {
        font-size: 1.5rem;
    }
    .step-item {
        flex-direction: column;
        align-items: stretch;
    }
    .step-num {
        align-self: flex-start;
    }
}