/* 中国风颜色变量 */
:root {
    --chinese-red: #C41E3A;
    --chinese-gold: #FFD700;
    --chinese-ink: #333333;
    --chinese-paper: #F5F5DC;
    --chinese-celadon: #7BA05B;
    --chinese-brown: #8B4513;
    --chinese-gray: #D3D3D3;
}

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: var(--chinese-ink);
    background-color: var(--chinese-paper);
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z" fill="%23d3c8b4" fill-opacity="0.2" fill-rule="evenodd"/%3E%3C/svg%3E');
}

/* 头部样式 */
header {
    background-color: var(--chinese-red);
    color: var(--chinese-gold);
    padding: 1.5rem 0;
    text-align: center;
    position: relative;
    background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23ffd700" fill-opacity="0.1"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    border-bottom: 3px solid var(--chinese-gold);
}

header::before,
header::after {
    content: '';
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M50 0L60 40H90L60 60L90 100L50 60L10 100L40 60L10 40H40L50 0Z" fill="%23FFD700" fill-opacity="0.2"/%3E%3C/svg%3E');
    background-repeat: no-repeat;
    background-size: contain;
}

header::before {
    left: 0;
    transform: rotateY(180deg);
}

header::after {
    right: 0;
}

header h1 {
    margin-bottom: 1rem;
    font-size: 2rem;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    letter-spacing: 2px;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    padding: 0 2rem;
}

nav a {
    color: var(--chinese-gold);
    text-decoration: none;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

nav a:hover {
    color: var(--chinese-red);
    background-color: var(--chinese-gold);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--chinese-gold);
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 80%;
}

/* 主内容样式 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* 英雄区样式 */
.hero {
    background-color: var(--chinese-red);
    color: var(--chinese-gold);
    padding: 3rem;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    border: 2px solid var(--chinese-gold);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23ffd700" fill-opacity="0.1"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: 4px;
    z-index: 0;
}

.hero h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    position: relative;
    z-index: 1;
    letter-spacing: 3px;
}

.hero p {
    font-size: 1.2rem;
    position: relative;
    z-index: 1;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

/* 模块卡片样式 */
.modules {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.module-card {
    background-color: var(--chinese-paper);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: all 0.4s ease;
    position: relative;
    border: 1px solid var(--chinese-brown);
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z" fill="%23d3c8b4" fill-opacity="0.1" fill-rule="evenodd"/%3E%3C/svg%3E');
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 10px;
    background: linear-gradient(90deg, var(--chinese-red), var(--chinese-gold), var(--chinese-red));
    border-radius: 8px 8px 0 0;
}

.module-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 10px;
    background: linear-gradient(90deg, var(--chinese-red), var(--chinese-gold), var(--chinese-red));
    border-radius: 0 0 8px 8px;
}

.module-card:hover {
    transform: translateY(-8px) rotate(1deg);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.module-card h3 {
    color: var(--chinese-red);
    margin-bottom: 1.2rem;
    font-size: 1.4rem;
    text-align: center;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--chinese-brown);
    position: relative;
}

.module-card h3::after {
    content: '✦';
    position: absolute;
    right: 0;
    color: var(--chinese-gold);
}

.module-card p {
    margin-bottom: 1.8rem;
    color: var(--chinese-ink);
    line-height: 1.8;
    text-align: justify;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    background-color: var(--chinese-red);
    color: var(--chinese-gold);
    padding: 0.8rem 1.8rem;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 2px solid var(--chinese-gold);
    font-weight: bold;
    letter-spacing: 1px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 215, 0, 0.3), transparent);
    transition: left 0.6s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    background-color: var(--chinese-gold);
    color: var(--chinese-red);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
    border-color: var(--chinese-red);
}

.btn:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0,0,0,0.2);
}

/* 提交按钮样式 */
.submit-btn {
    background-color: var(--chinese-red);
    color: var(--chinese-gold);
    border: 2px solid var(--chinese-gold);
    padding: 0.8rem 2rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.4s ease;
    font-weight: bold;
    letter-spacing: 1px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.submit-btn:hover {
    background-color: var(--chinese-gold);
    color: var(--chinese-red);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
    border-color: var(--chinese-red);
}

.submit-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0,0,0,0.2);
}

/* 子模块样式 */
.submodules {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.submodule-card {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.submodule-card:hover {
    transform: translateY(-3px);
}

.submodule-card h4 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* 练习区域样式 */
.practice-area {
    background-color: var(--chinese-paper);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    margin-top: 2.5rem;
    position: relative;
    border: 1px solid var(--chinese-brown);
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z" fill="%23d3c8b4" fill-opacity="0.1" fill-rule="evenodd"/%3E%3C/svg%3E');
}

.practice-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 15px;
    background: linear-gradient(90deg, var(--chinese-red), var(--chinese-gold), var(--chinese-red));
    border-radius: 8px 8px 0 0;
}

.practice-area::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 15px;
    background: linear-gradient(90deg, var(--chinese-red), var(--chinese-gold), var(--chinese-red));
    border-radius: 0 0 8px 8px;
}

.practice-area h3 {
    color: var(--chinese-red);
    margin-bottom: 1.8rem;
    text-align: center;
    font-size: 1.6rem;
    padding: 0.5rem 0;
    position: relative;
    border-bottom: 1px solid var(--chinese-brown);
}

.practice-area h3::before,
.practice-area h3::after {
    content: '❖';
    color: var(--chinese-gold);
    margin: 0 10px;
}

.practice-area h4 {
    color: var(--chinese-brown);
    margin: 1.5rem 0 1rem;
    font-size: 1.2rem;
    border-left: 4px solid var(--chinese-red);
    padding-left: 10px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 2rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: bold;
    color: var(--chinese-ink);
    font-size: 1.1rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--chinese-brown);
    border-radius: 4px;
    font-size: 1rem;
    background-color: rgba(245, 245, 220, 0.8);
    transition: all 0.3s ease;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--chinese-red);
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.2);
    background-color: var(--chinese-paper);
    transform: translateY(-2px);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--chinese-gold);
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
    background-color: var(--chinese-paper);
    border: 2px solid var(--chinese-brown);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

table th,
table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--chinese-brown);
}

table th {
    background-color: var(--chinese-red);
    color: var(--chinese-gold);
    font-weight: bold;
    text-align: center;
}

table tr:hover {
    background-color: rgba(255, 215, 0, 0.1);
}

table tr:last-child td {
    border-bottom: none;
}

/* 提交按钮样式 */
.submit-btn {
    background-color: var(--chinese-red);
    color: var(--chinese-gold);
    border: 2px solid var(--chinese-gold);
    padding: 0.8rem 2rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.4s ease;
    font-weight: bold;
    letter-spacing: 1px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.submit-btn:hover {
    background-color: var(--chinese-gold);
    color: var(--chinese-red);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
    border-color: var(--chinese-red);
}

/* 结果显示样式 */
.result {
    margin-top: 2rem;
    padding: 1.5rem;
    border-radius: 4px;
    border: 2px solid var(--chinese-brown);
    background-color: var(--chinese-paper);
}

.result.correct {
    background-color: rgba(118, 185, 129, 0.2);
    color: var(--chinese-brown);
    border: 2px solid #76b981;
}

.result.incorrect {
    background-color: rgba(248, 215, 218, 0.3);
    color: var(--chinese-brown);
    border: 2px solid #f5c6cb;
}

/* 页脚样式 */
footer {
    background-color: var(--chinese-red);
    color: var(--chinese-gold);
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 3rem;
    border-top: 3px solid var(--chinese-gold);
    background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23ffd700" fill-opacity="0.1"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
}

/* 响应式设计 */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.5rem;
    }
    
    nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .hero {
        padding: 2rem;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
    
    .modules {
        grid-template-columns: 1fr;
    }
    
    .submodules {
        grid-template-columns: 1fr;
    }
}

/* 子模块卡片样式 */
.submodule-card {
    background-color: var(--chinese-paper);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: all 0.4s ease;
    position: relative;
    border: 1px solid var(--chinese-brown);
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z" fill="%23d3c8b4" fill-opacity="0.1" fill-rule="evenodd"/%3E%3C/svg%3E');
}

.submodule-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 8px;
    background: linear-gradient(90deg, var(--chinese-red), var(--chinese-gold), var(--chinese-red));
    border-radius: 8px 8px 0 0;
}

.submodule-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.submodule-card h4 {
    color: var(--chinese-red);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    border-bottom: 2px solid var(--chinese-gold);
    padding-bottom: 0.5rem;
    text-align: center;
}

/* 标签样式 */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tag {
    background-color: var(--chinese-paper);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.9rem;
    color: var(--chinese-brown);
    border: 1px solid var(--chinese-gold);
    transition: all 0.3s ease;
}

.tag:hover {
    background-color: var(--chinese-gold);
    color: var(--chinese-red);
    transform: translateY(-2px);
}

/* 提示样式 */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    border: 2px solid var(--chinese-brown);
    background-color: var(--chinese-paper);
}

.alert-info {
    border-left: 4px solid var(--chinese-celadon);
    color: var(--chinese-brown);
}

.alert-warning {
    border-left: 4px solid var(--chinese-gold);
    color: var(--chinese-brown);
}

.alert-danger {
    border-left: 4px solid var(--chinese-red);
    color: var(--chinese-brown);
}

.alert-success {
    border-left: 4px solid var(--chinese-celadon);
    color: var(--chinese-brown);
}

/* 列表样式 */
ul, ol {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

ul li {
    list-style-type: disc;
}

ol li {
    list-style-type: decimal;
}

/* 强调文本样式 */
strong {
    color: var(--chinese-red);
    font-weight: bold;
}

/* 链接样式 */
a {
    color: var(--chinese-red);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--chinese-gold);
    text-decoration: underline;
}

/* 引用样式 */
blockquote {
    border-left: 4px solid var(--chinese-red);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--chinese-brown);
    background-color: rgba(245, 245, 220, 0.5);
    padding: 1rem;
    border-radius: 0 4px 4px 0;
}

/* 分隔线样式 */
hr {
    border: none;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--chinese-gold), transparent);
    margin: 2rem 0;
}