/* 砀山易学国学文化公益交流平台 - 主样式表 */
:root {
    --primary: #2C4A52;
    --primary-light: #3E5F68;
    --primary-dark: #1F3438;
    --accent: #C9A96A;
    --cinnabar: #9E2B2B;
    --bg: #F7F4EC;
    --bg-white: #FDFBF7;
    --text: #1A1A1A;
    --text-light: #555555;
    --text-muted: #888888;
    --border: #E0D9C8;
    --border-light: #EBE5D6;
    --success: #52c41a;
    --danger: #cf1322;
    --warning: #faad14;
    --shadow: 0 2px 12px rgba(0,0,0,.06);
    --shadow-hover: 0 4px 20px rgba(0,0,0,.1);
    --radius: 8px;
    --radius-sm: 4px;
    --max-width: 1200px;
    --header-height: 64px;
    --font-title: "STKaiti", "KaiTi", "华文楷体", "楷体", serif;
    --font-lishu: "STLiti", "LiSu", "华文隶书", "隶书", serif;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 15px;
}

.container { max-width: var(--max-width); margin:0 auto; padding:0 20px; }

/* Header */
.site-header {
    background: var(--primary);
    border-bottom: 2px solid var(--accent);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}
.logo { text-decoration: none; }
.logo h1 {
    font-size: 22px;
    color: var(--accent);
    font-weight: 700;
    letter-spacing: 2px;
    white-space: nowrap;
    font-family: var(--font-lishu);
}
.main-nav { display: flex; gap: 4px; }
.main-nav a {
    display: inline-block;
    padding: 8px 14px;
    color: #E9DBB8;
    text-decoration: none;
    font-size: 14px;
    border-radius: var(--radius-sm);
    transition: all .2s;
    white-space: nowrap;
}
.main-nav a:hover { background: var(--primary-light); color: var(--accent); }
.mobile-menu-btn {
    display: none;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
}

/* Main Content */
.main-content { min-height: calc(100vh - var(--header-height) - 300px); padding: 30px 0; }

/* Hero / Banner */
.hero-section {
    background: linear-gradient(135deg, #1F3438 0%, #2C4A52 45%, #3E5F68 100%);
    color: #F5EDDA;
    padding: 60px 0;
    margin-bottom: 30px;
}
.hero-section .container { position: relative; }
.hero-section h2 {
    font-size: 34px;
    margin-bottom: 10px;
    font-family: var(--font-title);
    letter-spacing: 3px;
    color: var(--accent);
}
.hero-section p { font-size: 16px; opacity: .88; max-width: 600px; }

/* Section */
.section { margin-bottom: 40px; }
.section-title {
    font-size: 22px;
    color: var(--primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-title);
    font-weight: 700;
    letter-spacing: 1px;
}
.section-title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 22px;
    background: var(--cinnabar);
    border-radius: 2px;
}

/* Cards */
.card {
    background: var(--bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 24px;
    transition: box-shadow .3s;
}
.card:hover { box-shadow: var(--shadow-hover); border-color: var(--accent); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.card-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

/* Article Card */
.article-card { display: block; text-decoration: none; color: var(--text); }
.article-card h3 { font-size: 17px; margin-bottom: 8px; color: var(--text); }
.article-card .meta { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.article-card .summary { font-size: 14px; color: var(--text-light); line-height: 1.6; }
.article-card .cover-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}

/* Member Card */
.member-card { text-align: center; }
.member-card .avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 12px;
    border: 3px solid var(--accent);
}
.member-card h3 { font-size: 16px; margin-bottom: 4px; }
.member-card .member-no { font-size: 12px; color: var(--text-muted); }

/* Organization Table */
.org-section { margin-bottom: 24px; }
.org-section h3 {
    font-size: 17px;
    color: var(--primary);
    margin-bottom: 12px;
    padding: 8px 14px;
    background: var(--border-light);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
}
.org-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.org-table th, .org-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}
.org-table th {
    background: var(--bg);
    color: var(--primary);
    font-weight: 600;
    font-size: 13px;
}
.org-table tr:hover { background: var(--border-light); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--text);
    font-weight: 500;
    font-size: 14px;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: border-color .2s;
    background: var(--bg-white);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(139,69,19,.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all .2s;
    font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .9; }
.btn-success { background: var(--success); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-group { display: flex; gap: 10px; flex-wrap: wrap; }

/* Tables (admin) */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.admin-table th, .admin-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}
.admin-table th {
    background: var(--border-light);
    color: var(--primary);
    font-weight: 600;
}
.admin-table tr:hover { background: #fafaf7; }

/* Pagination */
.pagination { display: flex; justify-content: center; gap: 6px; margin: 30px 0; }
.page-link {
    display: inline-block;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    transition: all .2s;
}
.page-link:hover, .page-link.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Alerts */
.alert {
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-success { background: #f6ffed; border: 1px solid #b7eb8f; color: #389e0d; }
.alert-danger { background: #fff2f0; border: 1px solid #ffccc7; color: var(--danger); }
.alert-info { background: #e6f7ff; border: 1px solid #91d5ff; color: #0958d9; }

/* Tabs */
.tabs { display: flex; gap: 0; margin-bottom: 20px; border-bottom: 2px solid var(--border); }
.tab-link {
    padding: 10px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-light);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all .2s;
    font-family: inherit;
}
.tab-link:hover, .tab-link.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Activity List */
.activity-item {
    display: flex;
    gap: 20px;
    padding: 16px;
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 14px;
    transition: box-shadow .3s;
}
.activity-item:hover { box-shadow: var(--shadow-hover); }
.activity-item .date-badge {
    min-width: 64px;
    height: 64px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}
.activity-item .date-badge .day { font-size: 24px; font-weight: 700; }
.activity-info h4 { font-size: 16px; margin-bottom: 4px; }
.activity-info .detail { font-size: 13px; color: var(--text-light); }
.status-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}
.status-upcoming { background: #e6f7ff; color: #0958d9; }
.status-ongoing { background: #f6ffed; color: #389e0d; }
.status-ended { background: #f5f5f5; color: #999; }
.status-pending { background: #fffbe6; color: #d48806; }
.status-approved { background: #f6ffed; color: #389e0d; }
.status-rejected { background: #fff2f0; color: #cf1322; }

/* Footer */
.site-footer {
    background: #2C1810;
    color: #ccc;
    padding: 40px 0 20px;
    font-size: 14px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; }
.footer-col h3 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.footer-col p { margin-bottom: 6px; }
.footer-col a { display: block; color: #ccc; text-decoration: none; padding: 4px 0; transition: color .2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
    margin-top: 30px;
    padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,.1);
    text-align: center;
    font-size: 13px;
    color: #888;
}

/* Two column layout */
.two-col { display: grid; grid-template-columns: 1fr 350px; gap: 30px; }
.sidebar .card { margin-bottom: 16px; }

/* Breadcrumb */
.breadcrumb { font-size: 13px; color: var(--text-muted); margin-bottom: 20px; }
.breadcrumb a { color: var(--text-light); text-decoration: none; }
.breadcrumb a:hover { color: var(--primary); }

/* Admin Layout */
.admin-layout { display: grid; grid-template-columns: 220px 1fr; min-height: calc(100vh - var(--header-height)); }
.admin-sidebar {
    background: #2C1810;
    padding: 20px 0;
}
.admin-sidebar a {
    display: block;
    padding: 12px 24px;
    color: #ccc;
    text-decoration: none;
    font-size: 14px;
    transition: all .2s;
    border-left: 3px solid transparent;
}
.admin-sidebar a:hover, .admin-sidebar a.active {
    background: rgba(255,255,255,.05);
    color: #fff;
    border-left-color: var(--accent);
}
.admin-main { padding: 24px; }
.admin-main h2 { font-size: 20px; color: var(--primary); margin-bottom: 20px; }

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal-box {
    background: #fff;
    border-radius: var(--radius);
    padding: 30px;
    width: 500px;
    max-width: 95%;
    max-height: 80vh;
    overflow-y: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-btn { display: inline-block; }
    .main-nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 10px 0;
        border-bottom: 2px solid var(--border);
        box-shadow: var(--shadow);
    }
    .main-nav.show { display: flex; }
    .main-nav a { padding: 10px 20px; }

    .card-grid-3 { grid-template-columns: 1fr; }
    .two-col { grid-template-columns: 1fr; }
    .admin-layout { grid-template-columns: 1fr; }
    .admin-sidebar { display: flex; flex-wrap: wrap; padding: 10px; }
    .admin-sidebar a { padding: 8px 12px; font-size: 13px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .hero-section h2 { font-size: 24px; }
    .activity-item { flex-direction: column; }
    .logo h1 { font-size: 16px; }
}

/* 首页国风轮播 banner */
.hero-section.has-banner { padding: 0; }
.hero-banner { position: relative; width: 100%; height: 380px; overflow: hidden; }
.banner-slide {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    opacity: 0; transition: opacity 1.2s ease; z-index: 1;
}
.banner-slide.active { opacity: 1; z-index: 2; }
.banner-overlay {
    position: absolute; inset: 0; z-index: 3;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    background: linear-gradient(180deg, rgba(31,52,56,.35) 0%, rgba(31,52,56,.55) 100%);
    color: #F5EDDA; text-align: center; padding: 0 24px;
}
.banner-overlay h2 {
    font-size: 40px; margin: 0 0 14px;
    font-family: var(--font-title); letter-spacing: 6px; font-weight: 700;
    color: #F5EDDA; text-shadow: 0 2px 10px rgba(0,0,0,.5);
}
.banner-overlay p {
    font-size: 16px; margin: 0; letter-spacing: 3px;
    opacity: .9; max-width: 640px; text-shadow: 0 1px 6px rgba(0,0,0,.5);
}
@media (max-width: 768px) {
    .hero-banner { height: 280px; }
    .banner-overlay h2 { font-size: 26px; letter-spacing: 4px; }
}
/* 移动端响应式补充 */
@media (max-width: 768px) {
    .container { padding: 0 14px; }
    .card-grid { grid-template-columns: 1fr; }
    .hero-section p { font-size: 14px; }
    .banner-overlay p { font-size: 13px; letter-spacing: 2px; }
    .section-title { font-size: 19px; }
    .main-content { padding: 20px 0; }
    .footer-grid { grid-template-columns: 1fr; gap: 22px; }
    .footer-map iframe { height: 200px; }
}