:root {
    --primary-color: #d4424d;
    --secondary-color: #f3d6af;
    --border-color: #8b4513;
    --text-color: #2c1810;
    --bg-color: #faf4e8;
    --card-bg: #fffef9;
    --gold-color: #d4af37;
    --red-color: #c8161d;
    --jade-color: #8fbc8f;
    --font-family: "KaiTi", "楷体", "STKaiti", serif;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #faf4e8 0%, #f5e6d3 100%);
    background-attachment: fixed;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    user-select: none;
    position: relative;
    overflow-x: hidden;
}

/* 传统纹样背景 */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(212, 175, 55, 0.03) 35px, rgba(212, 175, 55, 0.03) 70px),
        repeating-linear-gradient(-45deg, transparent, transparent 35px, rgba(200, 22, 29, 0.02) 35px, rgba(200, 22, 29, 0.02) 70px);
    pointer-events: none;
    z-index: 1;
}

#app {
    position: relative;
    z-index: 2;
}

/* 祥云装饰 */
.cloud {
    position: fixed;
    background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0.2) 40%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0.6;
    z-index: 1;
}

.cloud-1 {
    width: 200px;
    height: 100px;
    top: 10%;
    left: 5%;
    animation: float 20s ease-in-out infinite;
}

.cloud-2 {
    width: 150px;
    height: 80px;
    top: 60%;
    right: 8%;
    animation: float 25s ease-in-out infinite reverse;
}

.cloud-3 {
    width: 180px;
    height: 90px;
    bottom: 15%;
    left: 10%;
    animation: float 22s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) translateX(0px);
    }
    50% {
        transform: translateY(-20px) translateX(10px);
    }
}

/* 印章装饰 */
.seal-decoration {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 70px;
    height: 70px;
    background: transparent;
    border: 3px solid var(--red-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        2px 2px 8px rgba(0, 0, 0, 0.2),
        inset 0 0 0 2px var(--red-color);
    transform: rotate(-8deg);
    z-index: 100;
}

.seal-content {
    color: var(--red-color);
    font-size: 14px;
    font-weight: bold;
    text-align: center;
    line-height: 1.3;
    font-family: "SimSun", "宋体", "KaiTi", serif;
    letter-spacing: 2px;
}

/* 标题容器装饰 */
.title-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    position: relative;
}

.title-decoration {
    width: 50px;
    height: 3px;
    background: linear-gradient(to right, transparent, var(--red-color), transparent);
    position: relative;
}

.title-decoration.left::before,
.title-decoration.right::before {
    content: "";
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--red-color);
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
}

.title-decoration.left::before {
    right: -4px;
}

.title-decoration.right::before {
    left: -4px;
}

.title-decoration.left::after,
.title-decoration.right::after {
    content: "";
    position: absolute;
    width: 5px;
    height: 5px;
    border: 2px solid var(--red-color);
    transform: translateY(-50%) rotate(45deg);
    top: 50%;
    background: transparent;
}

.title-decoration.left::after {
    left: 0;
}

.title-decoration.right::after {
    right: 0;
}

h1 {
    color: var(--text-color);
    margin: 0;
    text-shadow: 2px 2px 0px var(--secondary-color);
    font-size: 2.5rem;
    letter-spacing: 8px;
    position: relative;
    padding: 0 10px;
}

/* 移除之前的『』装饰 */

.controls {
    margin-bottom: 30px;
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

select {
    padding: 10px 20px;
    font-size: 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: linear-gradient(to bottom, #fffef9 0%, #f5ebe0 100%);
    font-family: inherit;
    cursor: pointer;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

select:hover {
    border-color: var(--red-color);
    box-shadow: 0 0 10px rgba(200, 22, 29, 0.3);
}

button {
    padding: 10px 20px;
    font-size: 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: linear-gradient(135deg, var(--red-color) 0%, #a61419 100%);
    color: white;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
    font-weight: bold;
}

button:active {
    transform: scale(0.95);
}

button:hover {
    box-shadow: 0 0 15px rgba(200, 22, 29, 0.5);
    transform: translateY(-2px);
}

/* 游戏主区域 */
.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

/* 抽抽乐视窗外框 */
.viewport-frame {
    position: relative;
    border: 8px solid var(--border-color);
    border-radius: 15px;
    background: linear-gradient(135deg, #fffef9 0%, #f5ebe0 100%);
    box-shadow: 
        10px 10px 20px rgba(0, 0, 0, 0.2),
        inset 0 0 30px rgba(212, 175, 55, 0.1);
    overflow: hidden;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 传统四角装饰 */
.corner-decoration {
    position: absolute;
    width: 30px;
    height: 30px;
    border-style: solid;
    border-color: var(--gold-color);
    z-index: 25;
}

.corner-tl {
    top: 10px;
    left: 10px;
    border-width: 3px 0 0 3px;
    border-top-left-radius: 5px;
}

.corner-tr {
    top: 10px;
    right: 10px;
    border-width: 3px 3px 0 0;
    border-top-right-radius: 5px;
}

.corner-bl {
    bottom: 10px;
    left: 10px;
    border-width: 0 0 3px 3px;
    border-bottom-left-radius: 5px;
}

.corner-br {
    bottom: 10px;
    right: 10px;
    border-width: 0 3px 3px 0;
    border-bottom-right-radius: 5px;
}

/* 装饰点缀 */
.corner-decoration::after {
    content: "✦";
    position: absolute;
    color: var(--red-color);
    font-size: 10px;
    opacity: 0.7;
}

.corner-tl::after {
    top: -8px;
    left: -8px;
}

.corner-tr::after {
    top: -8px;
    right: -8px;
}

.corner-bl::after {
    bottom: -8px;
    left: -8px;
}

.corner-br::after {
    bottom: -8px;
    right: -8px;
}

/* 蒙版装饰 - 模拟卡纸的质感 */
.mask-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.05);
    z-index: 20;
    border-radius: 5px;
}

/* 布局容器 */
.layout-lr {
    display: flex;
    flex-direction: row;
    align-items: center;
    /* 左右结构：左边固定，右边滑动 */
}

.layout-ud {
    display: flex;
    flex-direction: column;
    align-items: center;
    /* 上下结构：上边固定，下边滑动 */
}

/* 偏旁盒子 (固定的部分) */
.radical-box {
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    background: linear-gradient(135deg, #fffef9 0%, #faf4e8 100%);
    border: 2px solid var(--gold-color);
    border-radius: 8px;
    margin: 2px;
    box-shadow: 0 2px 8px rgba(212, 175, 55, 0.3);
}

/* 滑动区域视窗 (开窗部分) */
.slider-viewport {
    position: relative;
    overflow: hidden;
    border: 2px solid var(--gold-color);
    border-radius: 8px;
    background: linear-gradient(to bottom, #fdfbf7 0%, #f9f3ea 100%);
    margin: 2px;
    box-shadow: inset 0 2px 8px rgba(139, 69, 19, 0.1);
    z-index: 1;
}

/* 蒙版遮罩层 - 通过伪元素实现半透明遮挡 */
.slider-viewport::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* 允许穿透点击 */
    z-index: 2;
}

/* 左右结构：竖向遮罩 (上下半透明，中间透明) */
.layout-lr .slider-viewport::after {
    background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.8) 0%,
        rgba(255, 255, 255, 0.8) 33.33%,
        rgba(255, 255, 255, 0) 33.33%,
        rgba(255, 255, 255, 0) 66.66%,
        rgba(255, 255, 255, 0.8) 66.66%,
        rgba(255, 255, 255, 0.8) 100%
    );
    /* 增加内阴影增强洞口立体感 */
    box-shadow: inset 0 0 10px rgba(0,0,0,0.1);
}

/* 上下结构：横向遮罩 (左右半透明，中间透明) */
.layout-ud .slider-viewport::after {
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0.8) 0%,
        rgba(255, 255, 255, 0.8) 33.33%,
        rgba(255, 255, 255, 0) 33.33%,
        rgba(255, 255, 255, 0) 66.66%,
        rgba(255, 255, 255, 0.8) 66.66%,
        rgba(255, 255, 255, 0.8) 100%
    );
    box-shadow: inset 0 0 10px rgba(0,0,0,0.1);
}

/* 滑动条 */
.slider {
    position: absolute;
    display: flex;
    transition: transform 0.1s ease-out;
    cursor: grab;
    z-index: 1;
}
.slider:active {
    cursor: grabbing;
}

/* 左右结构时，Slider是竖向排列的部件 */
.layout-lr .slider {
    flex-direction: column;
    left: 0;
    width: 100%;
}

/* 上下结构时，Slider是横向排列的部件 */
.layout-ud .slider {
    flex-direction: row;
    top: 0;
    height: 100%;
}

/* 单个字符单元 */
.char-unit {
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
}

/* 拼音和字的组合容器 */
.py-char-group {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 左右结构：拼音在字上方 -> column */
.layout-lr .py-char-group {
    flex-direction: column;
}

/* 上下结构：拼音在字左方 -> row */
.layout-ud .py-char-group {
    flex-direction: row;
}

/* 拼音样式 */
.pinyin {
    font-size: 1.5rem;
    color: #666;
    text-align: center;
    font-family: Arial, sans-serif; /* 拼音用无衬线字体更清晰 */
}

/* 针对 UD 结构（拼音在左）的特殊处理 */
.layout-ud .pinyin {
    width: 60px;
    text-align: right;
    padding-right: 10px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

/* 针对 LR 结构（拼音在上）的特殊处理 */
.layout-lr .pinyin {
    height: 30px;
    line-height: 30px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    width: 100%;
}

/* 汉字样式 */
.character {
    font-size: 4rem;
    font-weight: bold;
    line-height: 1;
    color: var(--text-color);
    text-shadow: 1px 1px 2px rgba(212, 175, 55, 0.3);
}

/* 结果展示区 */
.result-area {
    margin-top: 20px;
    padding: 20px;
    border: 3px solid var(--gold-color);
    border-radius: 10px;
    background: linear-gradient(135deg, #fffef9 0%, #fef8f0 100%);
    min-width: 300px;
    text-align: center;
    box-shadow: 
        5px 5px 15px rgba(0, 0, 0, 0.1),
        inset 0 0 20px rgba(212, 175, 55, 0.1);
    position: relative;
}

.result-area::before,
.result-area::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--red-color);
}

.result-area::before {
    top: 5px;
    left: 5px;
    border-width: 2px 0 0 2px;
}

.result-area::after {
    bottom: 5px;
    right: 5px;
    border-width: 0 2px 2px 0;
}

.result-title {
    font-size: 1.1rem;
    color: var(--border-color);
    margin-bottom: 15px;
    letter-spacing: 3px;
    position: relative;
    display: inline-block;
}

.result-title::before,
.result-title::after {
    content: "~";
    color: var(--gold-color);
    margin: 0 8px;
}

.result-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
}

/* 结果区组合字 */
.result-combined {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 等号和加号 */
.result-equals,
.result-plus {
    font-size: 1.8rem;
    color: var(--gold-color);
    font-weight: bold;
}

/* 分解部件 */
.result-part {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.part-pinyin {
    font-size: 1.1rem;
    color: #888;
    font-family: Arial, sans-serif;
}

.part-char {
    font-size: 2.2rem;
    color: var(--text-color);
    font-family: var(--font-family);
    font-weight: bold;
}

.big-char {
    font-size: 4.5rem;
    color: var(--text-color);
    font-family: var(--font-family);
    text-shadow: 2px 2px 4px rgba(212, 175, 55, 0.3);
    background: linear-gradient(180deg, var(--text-color) 0%, var(--red-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: bold;
}

.big-pinyin {
    font-size: 1.6rem;
    color: var(--red-color);
    font-family: Arial, sans-serif;
    margin-bottom: 5px;
}

#welcome-msg {
    text-align: center;
    color: var(--border-color);
    font-size: 1.2rem;
    margin-top: 50px;
    padding: 30px;
    background: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(250,244,232,0.8) 100%);
    border-radius: 10px;
    border: 2px dashed var(--gold-color);
}

/* GitHub 角标 */
.github-corner {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 9999;
    fill: var(--border-color);
    color: var(--bg-color);
    border: 0;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.github-corner:hover {
    opacity: 1;
}

.github-corner:hover .octo-arm {
    animation: octocat-wave 560ms ease-in-out;
}

@keyframes octocat-wave {
    0%, 100% { transform: rotate(0); }
    20%, 60% { transform: rotate(-25deg); }
    40%, 80% { transform: rotate(10deg); }
}

@media (max-width: 500px) {
    .github-corner:hover .octo-arm {
        animation: none;
    }
    .github-corner .octo-arm {
        animation: octocat-wave 560ms ease-in-out;
    }
}

/* 移动端响应式优化 */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .cloud {
        opacity: 0.3;
    }
    
    .seal-decoration {
        width: 55px;
        height: 55px;
        bottom: 20px;
        right: 20px;
    }
    
    .seal-content {
        font-size: 11px;
        letter-spacing: 1px;
    }
    
    .title-decoration {
        width: 40px;
    }
    
    h1 {
        font-size: 1.8rem;
        letter-spacing: 4px;
    }
    
    .title-container {
        gap: 10px;
        margin-bottom: 15px;
    }
    
    .controls {
        gap: 8px;
        margin-bottom: 20px;
    }
    
    select, button {
        font-size: 1rem;
        padding: 8px 15px;
    }
    
    /* 缩小字体大小 */
    .character {
        font-size: 2.5rem;
    }
    
    .pinyin {
        font-size: 1rem;
    }
    
    /* 上下结构的拼音宽度调整 */
    .layout-ud .pinyin {
        width: 40px;
        padding-right: 5px;
        font-size: 0.9rem;
    }
    
    /* 左右结构的拼音高度调整 */
    .layout-lr .pinyin {
        height: 20px;
        line-height: 20px;
        font-size: 0.9rem;
    }
    
    /* 视窗框架缩小边距和边框 */
    .viewport-frame {
        border: 4px solid var(--border-color);
        padding: 10px;
        box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.15);
    }
    
    .corner-decoration {
        width: 20px;
        height: 20px;
    }
    
    .corner-decoration::after {
        font-size: 8px;
    }
    
    /* 结果展示区 */
    .result-area {
        min-width: auto;
        width: calc(100vw - 40px);
        max-width: 400px;
        padding: 15px;
    }
    
    .result-content {
        gap: 8px;
        flex-wrap: nowrap;
    }
    
    .big-char {
        font-size: 3rem;
    }
    
    .big-pinyin {
        font-size: 1.3rem;
    }
    
    .part-char {
        font-size: 1.6rem;
    }
    
    .part-pinyin {
        font-size: 0.9rem;
    }
    
    .result-equals,
    .result-plus {
        font-size: 1.3rem;
    }
    
    /* GitHub 角标缩小 */
    .github-corner svg {
        width: 60px;
        height: 60px;
    }
}

/* 超小屏幕进一步优化 */
@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }
    
    .character {
        font-size: 2rem;
    }
    
    .pinyin {
        font-size: 0.8rem;
    }
    
    .layout-ud .pinyin {
        width: 35px;
        font-size: 0.75rem;
    }
    
    .layout-lr .pinyin {
        font-size: 0.75rem;
    }
    
    .big-char {
        font-size: 2.5rem;
    }
    
    .big-pinyin {
        font-size: 1.1rem;
    }
    
    .part-char {
        font-size: 1.4rem;
    }
    
    .part-pinyin {
        font-size: 0.8rem;
    }
    
    .result-equals,
    .result-plus {
        font-size: 1.1rem;
    }
    
    .result-content {
        gap: 6px;
    }
}