/* ========== 论坛首页专用样式 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #5B8DEF;
    --bg: #FAFAFA;
    --white: #FFFFFF;
    --border: #E8E8E8;
    --text: #1F1F1F;
    --text-light: #666666;
}
body {
    font-family: -apple-system, 'PingFang SC', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}
.header {
    position: sticky; top: 0; z-index: 100;
    background: var(--white);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    max-width: 1100px; margin: 0 auto;
    padding: 0 24px; height: 60px;
    display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 600; color: var(--primary); text-decoration: none; }
.logo-icon {
    width: 32px; height: 32px;
    background: linear-gradient(135deg, #5B8DEF, #7AA2F7);
    border-radius: 8px; display: flex; align-items: center; justify-content: center; color: white; font-size: 16px;
}
.nav { display: flex; gap: 32px; }
.nav a { color: var(--text-light); text-decoration: none; font-size: 15px; font-weight: 500; transition: color 0.2s; }
.nav a:hover, .nav a.active { color: var(--primary); }
.btn {
    padding: 8px 20px; border-radius: 20px; font-size: 14px;
    font-weight: 500; cursor: pointer; border: none; transition: all 0.2s;
}
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-light); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: #4A7DE0; }
.btn-sm { padding: 4px 12px; font-size: 12px; }

/* 用户信息 */
.user-info { display: flex; align-items: center; gap: 12px; }
.user-avatar-link { display: flex; align-items: center; }
.user-avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; border: 2px solid var(--border); }
.user-name { color: var(--text); font-weight: 500; font-size: 14px; }
.user-coins { color: #F5A623; font-size: 12px; font-weight: 500; }
.search-box { position: relative; }
.search-box input {
    width: 200px; padding: 8px 12px 8px 36px;
    border: 1px solid var(--border); border-radius: 20px;
    font-size: 14px; background: var(--bg); transition: all 0.2s;
}
.search-box input:focus { outline: none; border-color: var(--primary); width: 260px; background: var(--white); }
.search-box::before { content: '\1F50D'; position: absolute; left: 12px; top: 50%; transform: translateY(-50%); font-size: 12px; }
.mobile-menu { display: none; }

/* Hero */
.hero {
    max-width: 1100px; margin: 0 auto; padding: 48px 24px;
    display: grid; grid-template-columns: 1fr 360px; gap: 48px; align-items: center;
}
.hero h1 { font-size: 32px; font-weight: 700; line-height: 1.3; margin-bottom: 16px; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: 16px; color: var(--text-light); margin-bottom: 24px; }
.hero-buttons { display: flex; gap: 12px; }

/* Featured Cards */
.hero-cards { display: flex; flex-direction: column; gap: 16px; }
.featured-card {
    background: var(--white); border-radius: 16px; padding: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s; cursor: pointer;
}
.featured-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(91,141,239,0.15); }
.featured-tag {
    display: inline-block; padding: 4px 10px; background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    color: white; font-size: 12px; font-weight: 500; border-radius: 12px; margin-bottom: 12px;
}
.featured-tag.elite { background: linear-gradient(135deg, #667EEA, #764BA2); }
.featured-title { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.featured-meta { font-size: 13px; color: var(--text-light); }
.featured-author { font-size: 12px; color: #999; margin-top: 8px; }

/* Categories */
.categories { max-width: 1100px; margin: 0 auto; padding: 0 24px 32px; display: flex; gap: 12px; flex-wrap: wrap; }
.category-btn {
    padding: 10px 20px; background: var(--white); border: 1px solid var(--border);
    border-radius: 24px; font-size: 14px; color: var(--text-light); cursor: pointer;
    transition: all 0.2s; display: flex; align-items: center; gap: 6px; text-decoration: none;
}
.category-btn:hover, .category-btn.active { background: var(--primary); border-color: var(--primary); color: white; }

/* Main Content */
.main-content { max-width: 1100px; margin: 0 auto; padding: 0 24px 60px; display: grid; grid-template-columns: 1fr 300px; gap: 32px; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.section-title { font-size: 18px; font-weight: 600; }
.view-all { font-size: 14px; color: var(--primary); text-decoration: none; }
.posts-list { display: flex; flex-direction: column; gap: 16px; }
.post-card {
    background: var(--white); border-radius: 12px; padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06); transition: all 0.2s; cursor: pointer;
}
.post-card:hover { box-shadow: 0 4px 16px rgba(91,141,239,0.12); }
.post-top { display: flex; gap: 12px; margin-bottom: 12px; }
.post-avatar {
    width: 40px; height: 40px; border-radius: 50%;
    background: linear-gradient(135deg, #E8F4FF, #D4E8FF);
    display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0;
    overflow: hidden;
}
.post-avatar img { width: 100%; height: 100%; object-fit: cover; }
.post-content { flex: 1; min-width: 0; }
.post-author-row { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; flex-wrap: wrap; }
.post-author { font-weight: 600; font-size: 14px; }
.post-badge { padding: 2px 8px; background: #FFF7E6; color: #FAAD14; font-size: 11px; border-radius: 4px; }
.post-class { padding: 2px 8px; background: #E8F4FF; color: var(--primary); font-size: 11px; border-radius: 4px; }
.post-time { font-size: 12px; color: #999; }
.post-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; color: var(--text); text-decoration: none; }
.post-excerpt { font-size: 14px; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-footer { display: flex; gap: 20px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.post-action { font-size: 13px; color: #999; }
.post-action:hover { color: var(--primary); }

/* Sidebar */
.sidebar { display: flex; flex-direction: column; gap: 24px; }
.widget { background: var(--white); border-radius: 12px; padding: 20px; box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.widget-title { font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.game-list { display: flex; flex-direction: column; gap: 12px; }
.game-item {
    display: flex; align-items: center; gap: 12px; padding: 10px;
    background: var(--bg); border-radius: 10px; transition: all 0.2s; cursor: pointer; text-decoration: none; color: inherit;
}
.game-item:hover { background: #E8F4FF; }
.game-icon {
    width: 40px; height: 40px; border-radius: 10px;
    background: linear-gradient(135deg, #5B8DEF, #7AA2F7);
    display: flex; align-items: center; justify-content: center; font-size: 18px; flex-shrink: 0;
    overflow: hidden;
}
.game-icon img { width: 100%; height: 100%; object-fit: cover; }
.game-info { flex: 1; min-width: 0; }
.game-name { font-weight: 500; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.game-stat { font-size: 12px; color: #999; }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.stat-item { text-align: center; padding: 12px 8px; background: var(--bg); border-radius: 8px; }
.stat-value { font-size: 18px; font-weight: 600; color: var(--primary); }
.stat-label { font-size: 11px; color: #999; }

/* Mobile Nav */
.mobile-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0; background: var(--white); border-top: 1px solid var(--border); padding: 8px 0; z-index: 100; }
.mobile-nav-inner { display: flex; justify-content: space-around; }
.mobile-nav-item { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 6px 12px; color: #999; text-decoration: none; font-size: 10px; }
.mobile-nav-item.active { color: var(--primary); }
.mobile-nav-item span:first-child { font-size: 22px; }

/* 返回顶部 */
.back-to-top { position: fixed; right: 24px; bottom: 80px; width: 44px; height: 44px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 4px 12px rgba(91,141,239,0.4); transition: all 0.3s; opacity: 0; visibility: hidden; z-index: 99; }
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 6px 16px rgba(91,141,239,0.5); }
.back-to-top img { width: 24px; height: 24px; }

/* Empty state */
.empty-state { text-align: center; padding: 40px; color: var(--text-light); }
.empty-state-icon { font-size: 48px; margin-bottom: 16px; }

@media (max-width: 1024px) { .main-content { grid-template-columns: 1fr; } .sidebar { display: none; } }
@media (max-width: 768px) {
    .nav, .search-box { display: none; }
    .mobile-menu { display: block; background: none; border: none; font-size: 24px; cursor: pointer; }
    .hero { grid-template-columns: 1fr; gap: 24px; padding: 32px 16px; }
    .hero h1 { font-size: 24px; }
    .categories, .main-content { padding-left: 16px; padding-right: 16px; }
    .main-content { padding-bottom: 80px; }
    .mobile-nav { display: block; }
}