:root {
    --paper-color: #f5e8c9;
    --paper-border: #d3b17d;
    --ink-color: #472d0c;
    --ink-light: #6e5530;
    --accent-color: #8c3a25;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --tree-line: #8b6b43;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'SimSun', 'STSong', serif;
    color: var(--ink-color);
    background: #2c1e0e url('https://i.imgur.com/tWrP6tW.jpg') repeat;
    line-height: 1.6;
}

.scroll-bg {
    min-height: 100vh;
    padding: 2rem;
    display: flex;
    justify-content: center;
}

.ancient-paper {
    background-color: var(--paper-color);
    border: 1px solid var(--paper-border);
    box-shadow: 0 4px 8px var(--shadow-color);
    padding: 2rem;
    max-width: 1000px;
    width: 100%;
    position: relative;
    margin: 0 auto;
    
    /* 纸张效果 */
    background-image: 
        linear-gradient(var(--paper-color) 2px, transparent 2px),
        linear-gradient(90deg, var(--paper-color) 2px, rgba(226, 207, 173, 0.2) 2px);
    background-size: 50px 50px, 50px 50px;
    background-position: -2px -2px, -2px -2px;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--paper-border);
    padding-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    color: var(--accent-color);
    text-shadow: 1px 1px 2px var(--shadow-color);
    font-weight: normal;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--ink-light);
}

.input-section {
    margin-bottom: 2rem;
    padding: 1rem;
    border: 1px dashed var(--paper-border);
    background-color: rgba(245, 232, 201, 0.5);
}

.input-group {
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: var(--ink-color);
}

input, textarea, select {
    padding: 0.8rem;
    border: 1px solid var(--paper-border);
    background-color: rgba(255, 255, 255, 0.7);
    font-family: inherit;
    font-size: 1rem;
    color: var(--ink-color);
    width: 100%;
    border-radius: 0;
}

textarea {
    min-height: 100px;
    resize: vertical;
}

.ancient-button {
    background-color: var(--paper-border);
    color: var(--ink-color);
    border: 1px solid var(--ink-light);
    padding: 0.8rem 1.2rem;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s;
    box-shadow: 2px 2px 5px var(--shadow-color);
}

.ancient-button:hover {
    background-color: var(--ink-light);
    color: var(--paper-color);
}

.ancient-button.secondary {
    background-color: rgba(245, 232, 201, 0.7);
}

.small-button {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
}

.family-tree-container {
    margin-top: 2rem;
}

.family-tree-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1.5rem;
}

/* 树形结构样式 */
.tree-view {
    display: flex;
    justify-content: center;
    padding: 2rem 0;
    overflow-x: auto;
}

.tree-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.ancestor-node {
    margin-bottom: 2rem;
}

.tree-children {
    display: flex;
    justify-content: center;
    margin-top: 2.5rem;
    position: relative;
}

.tree-branch {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 1rem;
    position: relative;
}

.tree-connector {
    width: 2px;
    height: 30px;
    background-color: var(--tree-line);
    margin-bottom: 0.5rem;
    position: relative;
}

.tree-branch .tree-connector:before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 100%;
    height: 2px;
    background-color: var(--tree-line);
    transform: translateX(-50%);
}

.tree-children:before {
    content: '';
    position: absolute;
    top: -15px;
    left: 50%;
    width: 2px;
    height: 15px;
    background-color: var(--tree-line);
    transform: translateX(-50%);
}

.member {
    background-color: rgba(255, 255, 255, 0.4);
    border: 1px solid var(--paper-border);
    padding: 1rem;
    min-width: 160px;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
    position: relative;
    z-index: 1;
}

.member:hover {
    background-color: rgba(211, 177, 125, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 3px 5px var(--shadow-color);
}

.member-name {
    font-size: 1.2rem;
    font-weight: bold;
}

.member-gender {
    font-size: 0.9rem;
    color: var(--ink-light);
    margin-bottom: 0.3rem;
}

.member-parent {
    font-size: 0.85rem;
    color: var(--ink-light);
    border-top: 1px dashed var(--paper-border);
    padding-top: 0.3rem;
}

/* 名字预览区域 */
.name-preview {
    background: rgba(255, 255, 255, 0.2);
    border: 1px dashed var(--paper-border);
    padding: 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.name-preview .input-group {
    margin-bottom: 0.5rem;
    width: 100%;
}

.preview-name {
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--accent-color);
    text-align: center;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--paper-border);
    margin-bottom: 0.8rem;
    width: 100%;
}

/* 模态框样式 */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.modal {
    max-width: 500px;
    width: 90%;
    padding: 2rem;
    position: relative;
}

.modal h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.modal-text {
    text-align: center;
    margin-bottom: 2rem;
}

.button-group {
    display: flex;
    justify-content: space-between;
    margin-top: 1.5rem;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.tree-node {
    animation: fadeIn 0.5s ease-in-out;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .scroll-bg {
        padding: 1rem;
    }
    
    .ancient-paper {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .member {
        min-width: 140px;
    }
    
    .tree-view {
        padding: 1rem 0;
    }
}