/* ========================================
   幻灯片系统样式
   ======================================== */

:root {
    --slide-bg: #FFFFFF;
    --slide-text: #1F2937;
    --slide-accent: linear-gradient(135deg, #4A90E2 0%, #7B68EE 100%);
}

body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

/* ========================================
   幻灯片容器
   ======================================== */

.slides-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: var(--slide-bg);
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 6rem 4rem 8rem 4rem;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-sizing: border-box;
}

.slide.active {
    opacity: 1;
    transform: translateX(0);
    z-index: 2;
}

.slide.prev {
    transform: translateX(-100%);
}

/* ========================================
   幻灯片类型
   ======================================== */

/* 封面页 */
.slide.cover {
    background: linear-gradient(135deg, #E8F4FF 0%, #F3EFFF 100%);
    position: relative;
    overflow: hidden;
}

.slide.cover::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: var(--slide-accent);
    opacity: 0.1;
    border-radius: 50%;
    filter: blur(80px);
}

.slide.cover h1 {
    font-size: 3.5rem;
    font-weight: 700;
    background: var(--slide-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    text-align: center;
}

.slide.cover .subtitle {
    font-size: 1.5rem;
    color: #6B7280;
    margin-bottom: 2rem;
}

/* 内容页 */
.slide-content {
    max-width: 1100px;
    width: 100%;
    max-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    overflow-y: auto;
}

.slide h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--slide-text);
    border-bottom: 3px solid transparent;
    border-image: var(--slide-accent) 1;
    padding-bottom: 0.5rem;
    display: inline-block;
}

.slide h3 {
    font-size: 1.8rem;
    margin: 1.5rem 0 1rem;
    color: var(--slide-text);
}

.slide p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #4B5563;
    margin-bottom: 1rem;
}

.slide ul, .slide ol {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #4B5563;
    padding-left: 2rem;
}

.slide li {
    margin-bottom: 0.5rem;
}

/* ========================================
   特殊元素
   ======================================== */

/* 强调文本 */
.highlight {
    background: var(--slide-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--slide-accent);
    color: white;
    border-radius: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    margin: 0 0.25rem;
}

/* 卡片 */
.card {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 1rem 0;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

/* 表格 */
.table-container {
    overflow-x: auto;
    margin: 2rem 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 1rem;
    background: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

thead {
    background: var(--slide-accent);
    color: white;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #E5E7EB;
}

th {
    font-weight: 600;
}

tbody tr:hover {
    background: #F9FAFB;
}

/* 代码块 */
.code-block {
    background: #1F2937;
    color: #E5E7EB;
    padding: 1.5rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 1rem 0;
}

.code-block code {
    color: #10B981;
}

/* 流程图 */
.flow-chart {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem 0;
    flex-wrap: wrap;
}

.flow-item {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #E8F4FF 0%, #F3EFFF 100%);
    border-radius: 0.5rem;
    border: 2px solid #4A90E2;
    font-weight: 500;
}

.flow-arrow {
    font-size: 1.5rem;
    color: #7B68EE;
}

/* 图标列表 */
.icon-list {
    list-style: none;
    padding: 0;
}

.icon-list li {
    padding: 0.75rem 0;
    padding-left: 2.5rem;
    position: relative;
}

.icon-list li::before {
    content: attr(data-icon);
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.1rem;
    line-height: 1;
}

/* ========================================
   导航控制
   ======================================== */

.slide-nav {
    position: fixed;
    bottom: 1.5rem;
    right: 2rem;
    left: 2rem;
    display: flex;
    gap: 0.4rem;
    z-index: 1000;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.page-btn {
    background: rgba(255, 255, 255, 0.9);
    color: #4A90E2;
    border: 1px solid #E5E7EB;
    padding: 0.4rem 0.7rem;
    border-radius: 0.4rem;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
    min-width: 2rem;
    text-align: center;
}

.page-btn:hover {
    background: rgba(74, 144, 226, 0.1);
    border-color: #4A90E2;
    transform: translateY(-1px);
}

.page-btn.active {
    background: linear-gradient(135deg, #4A90E2 0%, #7B68EE 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.3);
}

/* 进度条 */
.slide-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: var(--slide-accent);
    transition: width 0.3s ease;
    z-index: 1001;
}

/* 侧边菜单 */
.slide-menu {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1000;
}

.menu-toggle {
    background: white;
    border: 2px solid #E5E7EB;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.menu-toggle:hover {
    border-color: #4A90E2;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.menu-panel {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    padding: 1rem;
    min-width: 200px;
    display: none;
}

.menu-panel.active {
    display: block;
}

.menu-panel button {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    border-radius: 0.25rem;
    transition: background 0.2s ease;
    font-size: 0.95rem;
}

.menu-panel button:hover {
    background: #F3F4F6;
}

/* 返回首页按钮 */
.home-btn {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 1000;
    background: white;
    color: #4A90E2;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid #E5E7EB;
}

.home-btn:hover {
    border-color: #4A90E2;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

/* ========================================
   响应式
   ======================================== */

@media (max-width: 1080px) {
    .slide {
        padding: 5rem 1.5rem 7rem 1.5rem;
    }

    .slide.cover h1 {
        font-size: 2.5rem;
    }

    .slide.cover .subtitle {
        font-size: 1.2rem;
    }

    .slide h2 {
        font-size: 2rem;
    }

    .slide h3 {
        font-size: 1.5rem;
    }

    .slide p, .slide ul, .slide ol {
        font-size: 1rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .flow-chart {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .slide-nav {
        bottom: 1rem;
        left: 1rem;
        right: 1rem;
        gap: 0.3rem;
    }

    .page-btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.75rem;
        min-width: 1.8rem;
    }

    .home-btn, .menu-toggle {
        top: 1rem;
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .home-btn {
        left: 1rem;
    }

    .menu-toggle {
        right: 1rem;
    }
}

/* ========================================
   动画效果
   ======================================== */

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

.animate-in {
    animation: fadeInUp 0.6s ease-out;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }