/* 玉米知 - 共享样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --bg: #0f172a;
    --bg-card: #1e293b;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
header {
    background: linear-gradient(135deg, var(--bg-card), var(--bg));
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.logo { font-size: 24px; font-weight: bold; color: var(--primary); text-decoration: none; }
.logo span { color: var(--text); }
.logo:hover { text-decoration: none; }
nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
nav a { color: var(--text-muted); text-decoration: none; padding: 8px 16px; border-radius: 8px; transition: all 0.2s; }
nav a:hover { color: var(--text); background: var(--bg-card); text-decoration: none; }
nav a.active { color: var(--primary); background: rgba(99, 102, 241, 0.1); }
.search-box { display: flex; align-items: center; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 0 12px; }
.search-box input { background: transparent; border: none; color: var(--text); padding: 8px; width: 200px; outline: none; }
.search-box button { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 8px; }

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.2s;
}
.card:hover { border-color: var(--primary); }

/* Skill Card */
.skill-card { display: flex; gap: 16px; }
.skill-card:hover { transform: translateY(-2px); }
.vote-box { display: flex; flex-direction: column; align-items: center; min-width: 60px; }
.vote-btn {
    width: 40px; height: 40px;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s;
}
.vote-btn:hover { border-color: var(--primary); color: var(--primary); }
.vote-btn.voted { background: var(--primary); border-color: var(--primary); color: white; }
.vote-count { font-size: 18px; font-weight: bold; margin: 8px 0; color: var(--text); }
.skill-content { flex: 1; min-width: 0; }
.skill-header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.skill-title { font-size: 18px; font-weight: 600; color: var(--text); text-decoration: none; }
.skill-title:hover { color: var(--primary); text-decoration: none; }
.skill-badge { padding: 2px 8px; border-radius: 4px; font-size: 12px; color: white; white-space: nowrap; }
.skill-desc { color: var(--text-muted); font-size: 14px; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.skill-meta { display: flex; gap: 16px; font-size: 13px; color: var(--text-muted); flex-wrap: wrap; }
.skill-meta span { display: flex; align-items: center; gap: 4px; }

/* Pagination */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 30px 0; flex-wrap: wrap; }
.pagination button, .pagination a {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s;
}
.pagination button:hover, .pagination a:hover { border-color: var(--primary); color: var(--text); text-decoration: none; }
.pagination button.active, .pagination a.active { background: var(--primary); border-color: var(--primary); color: white; }
.pagination button:disabled { opacity: 0.5; cursor: not-allowed; }
.pagination .page-info { color: var(--text-muted); font-size: 14px; padding: 0 16px; }

/* Tabs & Filters */
.tabs { display: flex; gap: 8px; padding: 20px 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.tab {
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
}
.tab:hover { border-color: var(--primary); color: var(--text); }
.tab.active { background: var(--primary); border-color: var(--primary); color: white; }
.filter-bar { display: flex; gap: 12px; margin: 20px 0; flex-wrap: wrap; align-items: center; }
.filter-btn {
    padding: 6px 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--primary); color: var(--text); }
.filter-btn.active { background: var(--primary); border-color: var(--primary); color: white; }

/* Sidebar */
.main-layout { display: grid; grid-template-columns: 1fr 300px; gap: 30px; padding: 20px 0; }
@media (max-width: 900px) { .main-layout { grid-template-columns: 1fr; } }
.sidebar-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.sidebar-title { font-size: 16px; font-weight: 600; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.trending-item { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.trending-item:last-child { border-bottom: none; }
.trending-rank { width: 24px; height: 24px; background: var(--primary); border-radius: 4px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: bold; color: white; }
.trending-rank.gold { background: #f59e0b; }
.trending-rank.silver { background: #94a3b8; }
.trending-rank.bronze { background: #cd7f32; }
.trending-name { flex: 1; font-size: 14px; color: var(--text); text-decoration: none; }
.trending-name:hover { color: var(--primary); }
.trending-score { font-size: 13px; color: var(--text-muted); }

/* Category Tags */
.category-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.category-tag {
    padding: 6px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}
.category-tag:hover, .category-tag.active { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.category-tag .count { margin-left: 4px; opacity: 0.7; }

/* Hero Section */
.hero { text-align: center; padding: 60px 20px; background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg) 100%); }
.hero h1 { font-size: 48px; margin-bottom: 16px; background: linear-gradient(135deg, var(--primary), #a855f7); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { color: var(--text-muted); font-size: 18px; max-width: 600px; margin: 0 auto 24px; }
.stats-bar { display: flex; justify-content: center; gap: 40px; margin-top: 30px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-num { font-size: 32px; font-weight: bold; color: var(--primary); }
.stat-label { color: var(--text-muted); font-size: 14px; }

/* Page Header */
.page-header { padding: 40px 0; border-bottom: 1px solid var(--border); }
.page-header h1 { font-size: 32px; margin-bottom: 8px; }
.page-header p { color: var(--text-muted); }

/* Footer */
footer { background: var(--bg-card); border-top: 1px solid var(--border); padding: 40px 0; margin-top: 60px; text-align: center; color: var(--text-muted); }
footer a { color: var(--primary); text-decoration: none; }
footer a:hover { text-decoration: underline; }
.footer-links { display: flex; justify-content: center; gap: 24px; margin-bottom: 16px; flex-wrap: wrap; }

/* Loading & Empty States */
.loading { text-align: center; padding: 40px; color: var(--text-muted); }
.spinner { width: 40px; height: 40px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto 16px; }
@keyframes spin { to { transform: rotate(360deg); } }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state h3 { font-size: 20px; margin-bottom: 8px; color: var(--text); }

/* Skills Grid */
.skills-grid { display: grid; gap: 16px; padding: 20px 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 8px; font-size: 14px; font-weight: 500; cursor: pointer; transition: all 0.2s; text-decoration: none; border: none; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn-secondary { background: var(--bg-card); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--primary); text-decoration: none; }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-label { display: block; margin-bottom: 8px; color: var(--text); font-weight: 500; }
.form-input { width: 100%; padding: 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 14px; }
.form-input:focus { outline: none; border-color: var(--primary); }
.form-textarea { min-height: 120px; resize: vertical; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 32px; }
    .stats-bar { gap: 20px; }
    .stat-num { font-size: 24px; }
    nav { width: 100%; justify-content: center; }
    .search-box { width: 100%; }
    .search-box input { width: 100%; }
}

/* ============ 导航栏布局 ============ */
.header-inner {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s;
    font-size: 14px;
}

.nav-links a:hover {
    color: var(--text);
    background: rgba(255,255,255,0.05);
}

.nav-links a.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

/* ============ 用户导航栏样式 ============ */
.nav-user-area {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
    position: relative;
}

.nav-user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 8px;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.nav-user-btn:hover {
    background: rgba(255,255,255,0.05);
    border-color: var(--border);
}

.nav-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border);
}

.nav-username {
    font-size: 14px;
    font-weight: 500;
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text);
}

.nav-arrow {
    font-size: 10px;
    color: var(--text-muted);
    transition: transform 0.2s;
}

.nav-user-btn:hover .nav-arrow {
    transform: translateY(2px);
}

.nav-user-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    min-width: 240px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all 0.2s ease;
    z-index: 1000;
    overflow: hidden;
}

.nav-user-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.nav-user-menu .menu-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(99, 102, 241, 0.05);
    border-bottom: 1px solid var(--border);
}

.nav-user-menu .menu-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
}

.nav-user-menu .menu-info {
    flex: 1;
    min-width: 0;
}

.nav-user-menu .menu-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-user-menu .menu-email {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-user-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.15s;
}

.nav-user-menu a:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.nav-user-menu .menu-icon {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.nav-user-menu .menu-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}

.nav-user-menu .menu-logout {
    color: var(--danger) !important;
}

.nav-user-menu .menu-logout:hover {
    background: rgba(239, 68, 68, 0.1) !important;
}

/* 登录/注册按钮 */
.nav-login-btn, .nav-register-btn {
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.nav-login-btn {
    color: var(--text);
    border: 1px solid var(--border);
    background: transparent;
}

.nav-login-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
    text-decoration: none;
}

.nav-register-btn {
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    color: white;
    border: none;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.nav-register-btn:hover {
    background: linear-gradient(135deg, #7c3aed, #6366f1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    text-decoration: none;
}

/* 移动端适配 */
@media (max-width: 900px) {
    .header-inner {
        flex-wrap: wrap;
    }

    .search-box {
        order: 3;
        width: 100%;
        margin-top: 12px;
    }

    .nav-links {
        order: 2;
    }

    .nav-user-area {
        order: 2;
    }
}

@media (max-width: 768px) {
    .nav-username, .nav-arrow {
        display: none;
    }

    .nav-user-menu {
        right: -10px;
        min-width: 200px;
    }

    .nav-links a {
        padding: 8px 12px;
        font-size: 13px;
    }

    .nav-login-btn, .nav-register-btn {
        padding: 6px 14px;
        font-size: 13px;
    }
}