/* =========================================
   全局变量与基础设定
   ========================================= */
:root {
    --bg-parchment: #e8dfd5; /* 核心：复古牛皮纸底色 */
    --text-ink: #2b1c11;     /* 深墨褐色 */
    --accent-fade: #8a7360;  /* 褪色墨水 */
    --border-sketch: 2px solid #2b1c11; /* 手绘风格边框 */
    
    --font-heading: 'Rye', cursive; /* 西部风格标题 */
    --font-body: 'Lora', serif;     /* 优雅易读的衬线正文 */
    --font-handwriting: 'Caveat', cursive; /* 手写体 */
}

/* 恢复纯净的牛皮纸底色，不再需要加载图片 */
body {
    font-family: var(--font-body);
    background-color: var(--bg-parchment); 
    color: var(--text-ink);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* SVG 噪点滤镜：为纯色增加“粗糙的纸张物理质感” */
body::before {
    content: '';
    position: fixed;
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%;
    background-image: url('data:image/svg+xml;utf8,%3Csvg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"%3E%3Cfilter id="noiseFilter"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.65" numOctaves="3" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%25" height="100%25" filter="url(%23noiseFilter)" opacity="0.05"/%3E%3C/svg%3E');
    pointer-events: none; 
    z-index: -1; 
}

h1, h2, h3, .logo {
    font-family: var(--font-heading);
    font-weight: normal;
    margin-top: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 手写体特殊样式 */
.handwritten {
    font-family: var(--font-handwriting);
    font-size: 1.8rem;
    color: var(--accent-fade);
    text-transform: none;
    letter-spacing: normal;
    transform: rotate(-2deg);
    display: inline-block;
}

/* 交互按钮（墨水风格） */
.btn {
    display: inline-block;
    background: transparent;
    color: var(--text-ink);
    font-family: var(--font-heading);
    font-size: 1.2rem;
    padding: 12px 30px;
    text-decoration: none;
    border: var(--border-sketch);
    border-radius: 4px;
    transition: all 0.3s ease;
    box-shadow: 4px 4px 0px var(--text-ink);
    cursor: pointer;
    margin-top: 20px;
}

.btn:hover {
    background: var(--text-ink);
    color: var(--bg-parchment);
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--text-ink);
}

/* =========================================
   模块布局与细节样式
   ========================================= */

header {
    padding: 20px 0;
    border-bottom: var(--border-sketch);
}
header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo { 
    font-size: 2rem; 
    margin: 0; 
}
nav a {
    color: var(--text-ink);
    text-decoration: none;
    margin-left: 20px;
    font-weight: bold;
    transition: color 0.2s;
}
nav a:hover {
    color: var(--accent-fade);
}

section { 
    padding: 80px 0; 
    border-bottom: 1px dashed var(--accent-fade); 
}
section:last-of-type { 
    border-bottom: none; 
}
.section-title { 
    font-size: 2.5rem; 
    text-align: center; 
    margin-bottom: 50px; 
}

.hero {
    text-align: center;
    padding: 100px 20px;
    position: relative;
}
.hero h1 { 
    font-size: 4.5rem; 
    margin-bottom: 10px; 
    line-height: 1.2; 
    text-shadow: 2px 2px 0px rgba(255,255,255,0.4); 
}
.hero p.subtitle { 
    font-size: 1.3rem; 
    margin-bottom: 30px; 
}
.hero .handwritten-note { 
    position: absolute; 
    top: 15%; 
    right: 15%; 
    opacity: 0.8; 
}

.grid-3 { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 40px; 
}
.grid-2 { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr)); 
    gap: 50px; 
    align-items: center; 
}

/* 手绘卡片：配合纯色牛皮纸背景，采用提亮泛白效果 */
.sketch-card {
    border: var(--border-sketch);
    padding: 30px;
    background: rgba(255, 255, 255, 0.3); /* 轻微的白色提亮，区分层级 */
    box-shadow: 6px 6px 0px rgba(43, 28, 17, 0.1); /* 墨水投影 */
    transition: transform 0.2s ease;
}
.sketch-card:hover {
    transform: translateY(-5px);
}
.sketch-card h3 { 
    font-size: 1.5rem; 
    border-bottom: 1px solid var(--text-ink); 
    padding-bottom: 10px; 
    margin-bottom: 15px; 
}

.control-list {
    list-style-type: none;
    padding-left: 0;
    margin: 0;
}
.control-list li {
    margin-bottom: 12px;
    font-size: 1.1rem;
    border-bottom: 1px dashed rgba(43, 28, 17, 0.2);
    padding-bottom: 8px;
}
.control-list li:last-child {
    border-bottom: none;
}

.faq-item { 
    margin-bottom: 30px; 
}
.faq-item h4 { 
    font-family: var(--font-body); 
    font-weight: bold; 
    font-size: 1.2rem; 
    margin-bottom: 10px; 
}
.faq-item p { 
    margin-top: 0; 
    color: var(--text-ink); 
    opacity: 0.9; 
}

footer {
    background: var(--text-ink);
    color: var(--bg-parchment);
    text-align: center;
    padding: 40px 0;
    border-top: var(--border-sketch);
}
footer p { 
    margin: 5px 0; 
    font-size: 0.9rem; 
    opacity: 0.8; 
}

@media (max-width: 768px) {
    .hero h1 { 
        font-size: 2.8rem; 
    }
    .hero .handwritten-note { 
        display: none; 
    }
    header .container { 
        flex-direction: column; 
        gap: 15px; 
    }
    nav a { 
        margin: 0 10px; 
    }
    .section-title { 
        font-size: 2rem; 
    }
}

/* =========================================
   Wiki 导航扩展样式
   ========================================= */

/* Logo 改为链接 */
a.logo {
    text-decoration: none;
    color: var(--text-ink);
    font-size: 1.6rem;
}

/* 主导航 */
.main-nav {
    display: flex;
    gap: 0;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 8px 16px;
    color: var(--text-ink);
    text-decoration: none;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    letter-spacing: 1px;
    transition: color 0.2s;
    white-space: nowrap;
}

.nav-link:hover { color: var(--accent-fade); }

/* Dropdown */
.nav-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-parchment);
    border: var(--border-sketch);
    box-shadow: 4px 4px 0 rgba(43,28,17,0.15);
    min-width: 200px;
    z-index: 100;
}

.nav-dropdown a {
    display: block;
    padding: 10px 16px;
    color: var(--text-ink);
    text-decoration: none;
    font-size: 0.9rem;
    border-bottom: 1px dashed var(--accent-fade);
    transition: background 0.2s;
}

.nav-dropdown a:last-child { border-bottom: none; }
.nav-dropdown a:hover { background: rgba(43,28,17,0.06); }

.nav-item:hover .nav-dropdown { display: block; }

.nav-toggle {
    display: none;
    background: none;
    border: var(--border-sketch);
    font-size: 1.4rem;
    padding: 4px 10px;
    cursor: pointer;
    font-family: var(--font-body);
}

/* =========================================
   Hero 扩展
   ========================================= */

.hero-label {
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-fade);
    margin-bottom: 12px;
    font-family: var(--font-body);
}

.hero-sub {
    font-size: 2.5rem;
    display: block;
    color: var(--accent-fade);
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 24px;
}

.btn-outline {
    background: transparent;
    box-shadow: 4px 4px 0px var(--accent-fade);
    border-color: var(--accent-fade);
    color: var(--accent-fade);
}

.btn-outline:hover {
    background: var(--accent-fade);
    color: var(--bg-parchment);
}

/* =========================================
   分类卡片 (5列)
   ========================================= */

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.category-card {
    display: block;
    text-decoration: none;
    color: var(--text-ink);
    border: var(--border-sketch);
    padding: 24px 20px;
    background: rgba(255,255,255,0.3);
    box-shadow: 4px 4px 0 rgba(43,28,17,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
    text-align: center;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 6px 6px 0 rgba(43,28,17,0.15);
}

.category-icon { font-size: 2rem; margin-bottom: 10px; }

.category-card h3 {
    font-size: 1.1rem;
    margin: 0 0 8px;
    border-bottom: 1px dashed var(--accent-fade);
    padding-bottom: 8px;
}

.category-card p {
    font-size: 0.85rem;
    color: var(--accent-fade);
    margin: 0 0 10px;
    line-height: 1.5;
}

.category-count {
    font-size: 0.75rem;
    font-family: var(--font-heading);
    letter-spacing: 1px;
    color: var(--accent-fade);
    opacity: 0.7;
}

/* =========================================
   文章卡片
   ========================================= */

.article-card {
    display: block;
    text-decoration: none;
    color: var(--text-ink);
}

.article-tag {
    display: inline-block;
    font-size: 0.72rem;
    font-family: var(--font-heading);
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent-fade);
    border: 1px solid var(--accent-fade);
    padding: 2px 8px;
    margin-bottom: 10px;
}

.article-card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.article-card p {
    font-size: 0.9rem;
    color: var(--accent-fade);
    margin-bottom: 12px;
}

.read-more {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: var(--text-ink);
}

.inline-link {
    display: inline-block;
    margin-top: 10px;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: var(--text-ink);
    text-decoration: none;
    border-bottom: 1px solid var(--text-ink);
}

.inline-link:hover { color: var(--accent-fade); border-color: var(--accent-fade); }

/* =========================================
   SEO Block
   ========================================= */

#about-game {
    background: rgba(43,28,17,0.04);
}

.seo-block {
    max-width: 800px;
}

.seo-block h2 {
    font-size: 1.4rem;
    text-align: left;
    margin-bottom: 20px;
}

.seo-block p {
    font-size: 0.92rem;
    line-height: 1.85;
    color: var(--accent-fade);
    margin-bottom: 14px;
}

/* =========================================
   Footer 多列
   ========================================= */

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
    text-align: left;
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    letter-spacing: 1px;
    margin-bottom: 12px;
    color: var(--bg-parchment);
    border-bottom: 1px dashed rgba(232,223,213,0.3);
    padding-bottom: 8px;
}

.footer-col a {
    display: block;
    color: rgba(232,223,213,0.7);
    text-decoration: none;
    font-size: 0.88rem;
    margin-bottom: 6px;
    transition: color 0.2s;
}

.footer-col a:hover { color: var(--bg-parchment); }

.footer-bottom {
    border-top: 1px dashed rgba(232,223,213,0.2);
    padding-top: 20px;
    text-align: center;
}

/* =========================================
   Mobile
   ========================================= */

@media (max-width: 768px) {
    .nav-toggle { display: block; }

    .main-nav {
        display: none;
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        border-top: var(--border-sketch);
        margin-top: 12px;
        padding-top: 8px;
    }

    .main-nav.open { display: flex; }

    .nav-item { width: 100%; }

    .nav-dropdown {
        position: static;
        display: none;
        box-shadow: none;
        border: none;
        border-left: 3px solid var(--accent-fade);
        margin-left: 16px;
    }

    .nav-item.active .nav-dropdown { display: block; }

    .hero-sub { font-size: 1.8rem; }

    .grid-4 { grid-template-columns: repeat(2, 1fr); }

    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}