/**
 * ============================================
 * 首页优化样式 - 基于01_index_首页优化.txt
 * 古典文本数字化教学平台 - 国风高级感设计
 * ============================================
 */

/* ===== 全局平滑滚动 ===== */
html {
    scroll-behavior: smooth;
}

/* ===== Hero区优化 - 首屏核心区 ===== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Hero背景：全屏水墨山水 + 渐变遮罩 */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(to top, rgba(139, 69, 19, 0.6) 0%, rgba(139, 69, 19, 0) 50%),
        url('../images/hero-shanshui.jpg') center/cover no-repeat;
    z-index: -2;
    /* 页面加载时从模糊到清晰 */
    animation: heroBlurClear 1.2s ease-out forwards;
    filter: blur(0px);
}

@keyframes heroBlurClear {
    0% {
        filter: blur(10px);
        opacity: 0.8;
    }
    100% {
        filter: blur(0px);
        opacity: 1;
    }
}

/* Hero文字容器 */
.hero-content {
    text-align: center;
    max-width: 900px;
    padding: 0 20px;
    /* 文字从下往上水墨淡入 */
    animation: heroTextFadeIn 0.8s ease-out 0.3s both;
}

@keyframes heroTextFadeIn {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 主标题样式 */
.hero-title {
    font-size: 36px;
    font-family: 'Noto Serif SC', 'Source Han Serif SC', serif;
    font-weight: 700;
    color: #8B4513;
    line-height: 1.4;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 20px;
}

/* 主标题下方金线分隔 */
.hero-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 1px;
    background: linear-gradient(to right, transparent, #D4AF37, transparent);
}

/* 副标题样式 */
.hero-subtitle {
    font-size: 16px;
    font-family: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', serif;
    color: #363636;
    line-height: 1.8;
    margin-top: 20px;
}

/* ===== 核心创新点模块 - 书卷造型卡片 ===== */
.feature-section {
    padding: 80px 0;
    background-color: #FAF0E6;
}

/* 书卷造型卡片 */
.feature-card {
    background-color: #FFFAF0;
    border: 1px solid #8B4513;
    border-radius: 4px;
    padding: 30px 24px;
    height: 100%;
    position: relative;
    /* 书卷两侧装饰 */
    box-shadow: 
        -3px 0 0 rgba(139, 69, 19, 0.1),
        3px 0 0 rgba(139, 69, 19, 0.1);
    transition: transform 0.5s ease, box-shadow 0.5s ease;
    opacity: 0;
    transform: translateY(30px);
}

/* 滚动进入可视区域时显示 */
.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 卡片延迟动画 */
.feature-card.delay-1 { transition-delay: 0.1s; }
.feature-card.delay-2 { transition-delay: 0.2s; }
.feature-card.delay-3 { transition-delay: 0.3s; }

/* 卡片hover效果 */
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 
        -3px 0 0 rgba(139, 69, 19, 0.1),
        3px 0 0 rgba(139, 69, 19, 0.1),
        0 8px 20px rgba(54, 54, 54, 0.1);
}

/* 书卷顶部装饰 */
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(to right, transparent, #8B4513, transparent);
}

/* 核心关键词高亮 */
.feature-keyword {
    font-weight: 700;
    color: #DC143C;
    background: linear-gradient(to bottom, transparent 60%, rgba(220, 20, 60, 0.1) 60%);
    padding: 0 4px;
}

/* 栅格布局间距 */
.feature-row {
    --bs-gutter-x: 24px;
}

@media (max-width: 768px) {
    .feature-row {
        --bs-gutter-x: 16px;
    }
}

/* ===== 团队展示模块 - 竹简造型卡片 ===== */
.team-section {
    padding: 80px 0;
    background-color: #F5F5DC;
}

/* 竹简造型卡片 */
.team-card {
    background: linear-gradient(to right, #E8D4C4 0%, #FFFAF0 5%, #FFFAF0 95%, #E8D4C4 100%);
    border: 1px solid #8B4513;
    border-radius: 4px;
    padding: 25px 20px;
    text-align: center;
    position: relative;
    /* 竹简纹理效果 */
    box-shadow: 
        inset 2px 0 4px rgba(139, 69, 19, 0.1),
        inset -2px 0 4px rgba(139, 69, 19, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 
        inset 2px 0 4px rgba(139, 69, 19, 0.1),
        inset -2px 0 4px rgba(139, 69, 19, 0.1),
        0 8px 20px rgba(54, 54, 54, 0.1);
}

/* 竹简横向纹理 */
.team-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        to bottom,
        transparent,
        transparent 28px,
        rgba(139, 69, 19, 0.03) 28px,
        rgba(139, 69, 19, 0.03) 29px
    );
    pointer-events: none;
}

/* 圆形头像 */
.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 2px solid #8B4513;
    margin: 0 auto 15px;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.team-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 核心贡献朱砂红标注 */
.team-contribution {
    color: #DC143C;
    font-weight: 600;
    font-size: 0.9rem;
}

/* ===== 导航栏优化 - 水墨透明渐变 ===== */
.navbar {
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.95), rgba(250, 240, 230, 0.9)) !important;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(190, 137, 84, 0.98) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 导航项下划线动画 */
.nav-link {
    position: relative;
    color: #8B4513 !important;
    font-weight: 500;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, transparent, #DC143C, transparent);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ===== 按钮交互优化 - 国风圆角 ===== */
.btn-guofeng {
    background-color: rgba(139, 69, 19, 0.8);
    color: #FFFAF0;
    border: none;
    border-radius: 8px;
    padding: 12px 30px;
    font-family: 'Noto Serif SC', serif;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-guofeng:hover {
    background-color: #8B4513;
    transform: scale(1.02);
    border: 1px solid #DC143C;
}

.btn-guofeng:active {
    transform: scale(0.98);
    box-shadow: 0 4px 8px rgba(54, 54, 54, 0.2);
}

/* ===== 回到顶部按钮 - 书卷造型 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 60px;
    background: linear-gradient(to right, #E8D4C4, #FFFAF0, #E8D4C4);
    border: 1px solid #8B4513;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.back-to-top i {
    color: #8B4513;
    font-size: 1.5rem;
}

/* ===== 价值罗盘 - 国风罗盘造型 ===== */
.value-compass {
    position: relative;
    width: 320px;
    height: 320px;
    margin: 50px auto;
}

.compass-outer {
    width: 100%;
    height: 100%;
    border: 4px solid #8B4513;
    border-radius: 50%;
    background: #FFFAF0;
    position: relative;
    box-shadow: 
        0 8px 30px rgba(0, 0, 0, 0.1),
        inset 0 0 30px rgba(139, 69, 19, 0.05);
    overflow: hidden;
}

/* 罗盘刻度装饰 */
.compass-outer::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 94%;
    height: 94%;
    border: 1px dashed rgba(139, 69, 19, 0.3);
    border-radius: 50%;
    pointer-events: none;
}

.compass-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #8B4513 0%, #A0522D 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFAF0;
    font-family: 'Noto Serif SC', serif;
    font-weight: 700;
    font-size: 1.2rem;
    z-index: 20;
    box-shadow: 0 4px 15px rgba(139, 69, 19, 0.3);
    border: 2px solid rgba(255, 250, 240, 0.3);
}

/* ===== 罗盘扇区 - 简化布局确保文字完整 ===== */
.compass-sector {
    position: absolute;
    width: 100px;
    height: 100px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    text-align: center;
    color: #5D3A1A;
    font-family: 'Noto Serif SC', serif;
    font-weight: 600;
    z-index: 5;
    background: rgba(139, 69, 19, 0.08);
    border: 2px solid rgba(139, 69, 19, 0.4);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(139, 69, 19, 0.1);
}

.compass-sector:hover {
    background: rgba(220, 20, 60, 0.12);
    border-color: #DC143C;
    color: #8B4513;
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(220, 20, 60, 0.2);
}

.compass-sector i {
    font-size: 1.8rem;
    color: #8B4513;
    margin-bottom: 6px;
    display: block;
}

.compass-sector span {
    display: block;
    line-height: 1.2;
}

/* 三个扇区位置 - 等边三角形分布 */
.sector-academic {
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
}
.sector-academic:hover {
    transform: translateX(-50%) scale(1.1);
}

.sector-teaching {
    bottom: 30px;
    left: 35px;
}

.sector-social {
    bottom: 30px;
    right: 35px;
}

/* ===== 中式列表符号 ===== */
.chinese-list {
    list-style: none;
    padding-left: 0;
}

.chinese-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    line-height: 1.6;
}

.chinese-list li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: #8B4513;
    font-size: 0.8rem;
}

/* ===== 响应式适配 ===== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .value-compass {
        width: 260px;
        height: 260px;
    }
    
    .compass-inner {
        width: 70px;
        height: 70px;
        font-size: 1rem;
    }
    
    .compass-sector {
        width: 85px;
        height: 85px;
        font-size: 0.75rem;
    }
    
    .compass-sector i {
        font-size: 1.4rem;
        margin-bottom: 4px;
    }
    
    .sector-academic {
        top: 10px;
    }
    
    .sector-teaching {
        bottom: 20px;
        left: 20px;
    }
    
    .sector-social {
        bottom: 20px;
        right: 20px;
    }
}

/* ===== 图片素材提示 ===== */
/*
 * 【Hero背景图素材说明】
 * 路径：assets/images/hero-shanshui.jpg
 * 建议：千里江山图风格水墨山水长卷
 * 尺寸：1920x1080px 或更大
 * 色调：青绿山水或水墨淡雅风格
 * 
 * 素材来源建议：
 * - 故宫博物院官网（千里江山图高清资源）
 * - 站酷海洛、摄图网（搜索"水墨山水"、"千里江山"）
 * - 自制：使用AI生成工具生成16:9水墨山水图
 */