/**
 * 汉易学平台统一主题样式
 * 基于pinyin.php的现代化配色方案
 * 确保整个平台设计风格一致
 */

/* ===== 全局变量定义 ===== */
:root {
    /* 主色调 - 紫色到蓝色渐变系列 */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-blue: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --primary-pink: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    --primary-warm: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --primary-soft: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    
    /* 背景色 */
    --bg-main: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-container: rgba(255, 255, 255, 0.98);
    --bg-section: rgba(255, 255, 255, 0.9);
    --bg-header: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --bg-nav: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --bg-sidebar: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* 文字颜色 */
    --text-primary: #2c3e50;
    --text-secondary: #5a6c7d;
    --text-light: white;
    --text-muted: #8e9aaf;
    --text-hint: #95a5a6;
    
    /* 主题颜色 */
    --primary-color: #4facfe;
    --primary-dark: #3b8bdb;
    --primary-light: rgba(79, 172, 254, 0.1);
    
    /* 背景和表面颜色 */
    --background-color: #f8f9fa;
    --surface-color: #ffffff;
    --border-color: #e9ecef;
    
    /* 阴影和边框 */
    --shadow-light: 0 4px 15px rgba(168, 237, 234, 0.4);
    --shadow-medium: 0 8px 25px rgba(79, 172, 254, 0.3);
    --shadow-heavy: 0 20px 40px rgba(0, 0, 0, 0.1);
    --border-light: 1px solid rgba(255, 255, 255, 0.3);
    --border-medium: 2px solid rgba(255, 255, 255, 0.3);
    
    /* 圆角 */
    --radius-small: 8px;
    --radius-medium: 15px;
    --radius-large: 20px;
    --radius-round: 50%;
    
    /* 过渡动画 */
    --transition-fast: all 0.3s ease;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 全局基础样式 ===== */
* {
    box-sizing: border-box;
}

html {
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-main);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    padding-bottom: 60px; /* 为底部导航栏留出空间 */
    color: var(--text-primary);
    line-height: 1.6;
    position: relative; /* 创建新的堆叠上下文 */
    z-index: 0; /* 设置基础层级 */
    overflow-x: hidden;
}

/* ===== 容器样式 ===== */
.unified-container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 2rem;
    background: var(--bg-container);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-heavy);
    border: var(--border-light);
}

.unified-section {
    background: var(--bg-section);
    padding: 25px;
    border-radius: var(--radius-medium);
    margin: 20px 0;
    box-shadow: var(--shadow-medium);
    border: var(--border-light);
}

.unified-header {
    background: var(--bg-header);
    padding: 20px;
    border-radius: var(--radius-medium);
    margin-bottom: 20px;
    box-shadow: var(--shadow-medium);
    border: var(--border-light);
}

/* ===== 按钮样式 (基于pinyin.php的chinesepinyin样式) ===== */

/* 基础按钮样式 */
.unified-btn, .btn, .button, button, input[type="submit"], input[type="button"] {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    margin-bottom: 0.5rem;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(79, 172, 254, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    padding: 12px 24px;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.unified-btn:hover, .btn:hover, .button:hover, button:hover,
input[type="submit"]:hover, input[type="button"]:hover,
.unified-btn:focus, .btn:focus, .button:focus, button:focus,
input[type="submit"]:focus, input[type="button"]:focus {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: #2c3e50;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(168, 237, 234, 0.5);
    text-decoration: none;
}

/* 主要按钮样式 (chinesepinyin) */
.unified-btn-primary, .btn-primary, .button.chinesepinyin {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    margin-bottom: 0.5rem;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(79, 172, 254, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.unified-btn-primary:hover, .btn-primary:hover, .button.chinesepinyin:hover,
.unified-btn-primary:focus, .btn-primary:focus, .button.chinesepinyin:focus {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: #2c3e50;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(168, 237, 234, 0.5);
}

/* 次要按钮样式 (chinesepinyin2) */
.unified-btn-secondary, .btn-secondary, .button.chinesepinyin2 {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    color: #2c3e50;
    margin-bottom: 0.5rem;
    border: none;
    border-radius: 25px;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(255, 154, 158, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.unified-btn-secondary:hover, .btn-secondary:hover, .button.chinesepinyin2:hover,
.unified-btn-secondary:focus, .btn-secondary:focus, .button.chinesepinyin2:focus {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    color: #2c3e50;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 236, 210, 0.5);
}

/* 柔和按钮样式 (chinesepinyin3) */
.unified-btn-soft, .btn-soft, .button.chinesepinyin3 {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1rem;
    padding: 0.85rem 1rem;
    border: none;
    border-radius: 15px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(168, 237, 234, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
}

.unified-btn-soft:hover, .btn-soft:hover, .button.chinesepinyin3:hover,
.unified-btn-soft:focus, .btn-soft:focus, .button.chinesepinyin3:focus {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    color: #2c3e50;
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 236, 210, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.6);
}

/* 大型按钮样式 */
.unified-btn-large, .btn-large {
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 30px;
}

/* 小型按钮样式 */
.unified-btn-small, .btn-small {
    padding: 8px 16px;
    font-size: 0.8rem;
    border-radius: 20px;
}

/* 展开按钮样式 */
.unified-btn-expanded, .btn-expanded, .button.expanded {
    width: 100%;
    display: block;
}

/* 按钮组样式 */
.button-group .button, .btn-group .btn {
    margin-right: 10px;
    margin-bottom: 10px;
}

.button-group .button:last-child, .btn-group .btn:last-child {
    margin-right: 0;
}

/* ===== 导航样式 ===== */
.unified-nav {
    background: var(--bg-nav);
    padding: 15px;
    border-radius: var(--radius-medium);
    margin: 20px 0;
    box-shadow: var(--shadow-medium);
    border: var(--border-light);
}

.unified-nav-item {
    display: inline-block;
    margin: 0 10px;
}

.unified-nav-link {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 20px;
    transition: var(--transition-fast);
    font-weight: 600;
}

.unified-nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
}

.unified-nav-link.active {
    background: var(--primary-pink);
    color: var(--text-primary);
}

/* ===== 卡片样式 ===== */
.unified-card {
    background: var(--bg-section);
    border-radius: var(--radius-medium);
    padding: 20px;
    margin: 15px 0;
    box-shadow: var(--shadow-light);
    border: var(--border-light);
    transition: var(--transition-fast);
}

.unified-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.unified-card-header {
    background: var(--bg-header);
    margin: -20px -20px 20px -20px;
    padding: 15px 20px;
    border-radius: var(--radius-medium) var(--radius-medium) 0 0;
}

/* ===== 表单样式 ===== */
.unified-form-group {
    margin-bottom: 20px;
}

.unified-form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.unified-form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid rgba(168, 237, 234, 0.3);
    border-radius: var(--radius-small);
    font-size: 1rem;
    transition: var(--transition-fast);
    background: rgba(255, 255, 255, 0.9);
}

.unified-form-input:focus {
    outline: none;
    border-color: rgba(79, 172, 254, 0.6);
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}

/* ===== 标题样式 ===== */
.unified-title {
    color: var(--text-primary);
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
}

.unified-title-large {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.unified-title-medium {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.unified-title-small {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* ===== 文本样式 ===== */
.unified-text {
    color: var(--text-secondary);
    line-height: 1.6;
    font-weight: 500;
}

.unified-text-light {
    color: white;
    font-weight: 500;
}

.unified-text-muted {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== 侧边栏样式 ===== */
.unified-sidebar {
    background: var(--bg-sidebar);
    color: white;
    padding: 25px;
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-medium);
    border: var(--border-light);
    backdrop-filter: blur(10px);
}

.unified-sidebar-title {
    color: white;
    font-weight: 700;
    margin-bottom: 1rem;
}

.unified-sidebar-link {
    color: rgba(168, 237, 234, 0.9);
    text-decoration: none;
    transition: var(--transition-fast);
    display: block;
    padding: 8px 0;
    font-weight: 500;
}

.unified-sidebar-link:hover {
    color: rgba(255, 236, 210, 1);
    text-decoration: underline;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* ===== 返回按钮样式 ===== */
.unified-back-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: var(--primary-pink);
    color: var(--text-primary);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 24px;
    font-weight: 700;
    z-index: 1000;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-medium);
    border: var(--border-medium);
}

.unified-back-btn:hover {
    background: var(--primary-soft);
    transform: scale(1.15) rotate(-5deg);
    color: var(--text-primary);
    text-decoration: none;
    box-shadow: 0 12px 35px rgba(168, 237, 234, 0.5);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .unified-container {
        margin: 10px;
        padding: 1rem;
    }

    .unified-section {
        padding: 15px;
        margin: 10px 0;
    }

    .unified-btn, .btn, .button, button, input[type="submit"], input[type="button"] {
        padding: 10px 20px;
        font-size: 0.8rem;
    }

    .unified-btn-soft, .btn-soft, .button.chinesepinyin3 {
        font-size: 0.9rem;
        padding: 0.7rem 0.5rem;
    }

    .unified-title-large {
        font-size: 2rem;
    }

    .unified-title-medium {
        font-size: 1.5rem;
    }
}

/* ===== 工具类 ===== */
.unified-text-center { text-align: center; }
.unified-text-left { text-align: left; }
.unified-text-right { text-align: right; }

.unified-mb-1 { margin-bottom: 0.5rem; }
.unified-mb-2 { margin-bottom: 1rem; }
.unified-mb-3 { margin-bottom: 1.5rem; }
.unified-mb-4 { margin-bottom: 2rem; }

.unified-mt-1 { margin-top: 0.5rem; }
.unified-mt-2 { margin-top: 1rem; }
.unified-mt-3 { margin-top: 1.5rem; }
.unified-mt-4 { margin-top: 2rem; }

.unified-p-1 { padding: 0.5rem; }
.unified-p-2 { padding: 1rem; }
.unified-p-3 { padding: 1.5rem; }
.unified-p-4 { padding: 2rem; }

.unified-hidden { display: none; }
.unified-block { display: block; }
.unified-inline { display: inline; }
.unified-inline-block { display: inline-block; }
.unified-flex { display: flex; }

.unified-w-full { width: 100%; }
.unified-h-full { height: 100%; }