/* ==========================================
   刘家·传承 — 全局样式
   传统中国风 + 移动适配
   ========================================== */

:root {
    --bg-color: #e8e4d9;
    --text-main: #1a1a1a;
    --text-sub: #4a4a4a;
    --accent: #8b0000;
    --seal-color: #8b0000;
    --white: #fff;
    --border: #c0b8a8;
    --link: #8b0000;
    --success: #2d6a2d;
    --error: #8b0000;
    --warning: #8b6914;
    --radius: 4px;
}

*, *::before, *::after { box-sizing: border-box; }

body {
    margin: 0; padding: 0;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 30% 20%, rgba(0,0,0,0.03) 0%, transparent 40%),
        radial-gradient(circle at 70% 80%, rgba(0,0,0,0.03) 0%, transparent 40%),
        url('https://www.transparenttextures.com/patterns/paper-fibers.png');
    font-family: "STKaiti", "KaiTi", "楷体", "PingFang SC", "Microsoft YaHei", serif;
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.site-header {
    background: rgba(255,255,255,0.92);
    border-bottom: 2px solid var(--accent);
    padding: 0;
}
.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 8px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}
.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-main);
}
.seal-box {
    width: 40px; height: 40px;
    background: var(--seal-color);
    border: 2px double rgba(255,255,255,0.3);
    display: flex; align-items: center; justify-content: center;
}
.seal-text {
    color: rgba(255,255,255,0.9);
    font-size: 22px; font-weight: bold;
}
.site-title {
    font-size: 1.3rem; font-weight: 900;
    letter-spacing: 0.3rem;
}
.site-nav {
    display: flex; flex-wrap: wrap; gap: 15px; align-items: center;
    font-size: 0.95rem;
}
.site-nav a {
    color: var(--text-main); text-decoration: none;
    padding: 4px 8px; border-radius: var(--radius);
    transition: all 0.3s;
}
.site-nav a:hover {
    background: var(--accent); color: var(--white);
}
.nav-user {
    color: var(--accent); font-weight: bold;
}

/* ===== Main ===== */
.site-main {
    flex: 1;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 30px 20px;
}

/* ===== Footer ===== */
.site-footer {
    text-align: center;
    padding: 20px;
    font-size: 0.85rem;
    color: #888;
    border-top: 1px solid var(--border);
    background: rgba(255,255,255,0.5);
}
.site-footer a { color: #888; text-decoration: none; }
.site-domain { font-size: 0.8rem; margin-top: 4px; }

/* ===== Home Page ===== */
.main-container {
    display: flex; flex-direction: column;
    align-items: center; text-align: center;
    animation: fadeIn 2s ease-in;
    padding: 40px 0;
}
.logo-wrapper { margin-bottom: 40px; }
.logo-wrapper .seal-box {
    width: 80px; height: 80px;
    box-shadow: 0 6px 15px rgba(0,0,0,0.3);
}
.logo-wrapper .seal-text { font-size: 45px; }
.content-box { padding: 0 20px; }
.content-box h1 {
    font-size: 3.5rem; margin: 0;
    letter-spacing: 0.8rem; font-weight: 900;
}
.content-box h2 {
    font-size: 1.4rem; margin-top: 15px;
    letter-spacing: 0.4rem; color: var(--text-sub); font-weight: 700;
}
.divider {
    width: 100px; height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    margin: 35px auto;
}
.description {
    font-size: 1.1rem; line-height: 2.2;
    color: var(--text-sub); max-width: 450px;
    margin: 0 auto 50px auto; font-weight: 600;
}
.nav-links { display: flex; gap: 30px; justify-content: center; }
.btn {
    text-decoration: none;
    padding: 12px 35px;
    border: 2px solid var(--text-main);
    color: var(--text-main);
    font-size: 1rem; font-weight: 700;
    background: transparent;
    cursor: pointer;
    transition: all 0.4s ease;
    display: inline-block;
    font-family: inherit;
}
.btn:hover {
    background: var(--text-main);
    color: var(--bg-color);
    transform: translateY(-3px);
}
.btn-primary {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
}
.btn-primary:hover {
    background: #a00000;
    color: var(--white);
}
.btn-sm { padding: 6px 16px; font-size: 0.85rem; }
.btn-danger { border-color: var(--error); color: var(--error); }
.btn-danger:hover { background: var(--error); color: var(--white); }

/* ===== Forms ===== */
.form-container {
    max-width: 480px;
    margin: 0 auto;
    padding: 30px;
    background: rgba(255,255,255,0.7);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.form-container h2 {
    text-align: center; margin-top: 0;
    letter-spacing: 0.3rem;
}
.auth-form label {
    display: block; margin-bottom: 15px;
    font-weight: 600;
}
.auth-form input[type="text"],
.auth-form input[type="password"],
.auth-form input[type="email"],
.auth-form select,
.auth-form textarea {
    display: block; width: 100%;
    margin-top: 4px; padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit; font-size: 1rem;
    background: var(--white);
}
.auth-form textarea { min-height: 120px; resize: vertical; }
.auth-form fieldset {
    border: 1px solid var(--border);
    padding: 12px 16px; margin-bottom: 15px;
    border-radius: var(--radius);
}
.radio-label { display: inline-block; margin-right: 20px; font-weight: normal; }
.auth-form button { margin-top: 10px; width: 100%; }
.form-footer { text-align: center; margin-top: 15px; font-size: 0.9rem; }

/* ===== Messages ===== */
.msg { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 15px; }
.msg-error { background: #fde8e8; color: var(--error); border: 1px solid #f5c6c6; }
.msg-success { background: #e8f5e8; color: var(--success); border: 1px solid #c6e6c6; }
.msg-info { background: #e8f0fe; color: #1a3a6a; border: 1px solid #c6daf5; }

/* ===== Tables ===== */
.data-table {
    width: 100%; border-collapse: collapse;
    margin: 20px 0;
    background: rgba(255,255,255,0.7);
}
.data-table th, .data-table td {
    padding: 10px 14px; border: 1px solid var(--border);
    text-align: left;
}
.data-table th { background: rgba(139,0,0,0.08); font-weight: 700; }
.data-table tr:hover { background: rgba(255,255,255,0.5); }

/* ===== Cards ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}
.card {
    background: rgba(255,255,255,0.7);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all 0.3s;
}
.card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.card h3 { margin-top: 0; color: var(--accent); }
.card .meta { font-size: 0.85rem; color: #888; margin-top: 10px; }

/* ===== Admin ===== */
.admin-layout { display: flex; gap: 20px; }
.admin-sidebar {
    width: 200px; flex-shrink: 0;
    background: rgba(255,255,255,0.7);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 15px;
}
.admin-sidebar a {
    display: block; padding: 8px 12px;
    color: var(--text-main); text-decoration: none;
    border-radius: var(--radius); margin-bottom: 4px;
}
.admin-sidebar a:hover, .admin-sidebar a.active {
    background: var(--accent); color: var(--white);
}
.admin-content { flex: 1; min-width: 0; }

/* ===== Pagination ===== */
.pagination {
    display: flex; gap: 8px; justify-content: center;
    margin: 20px 0;
}
.pagination a, .pagination span {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-main);
    background: rgba(255,255,255,0.5);
}
.pagination a:hover { background: var(--accent); color: var(--white); }
.pagination .current { background: var(--accent); color: var(--white); }

/* ===== Genealogy Tree ===== */
.tree-container {
    overflow-x: auto;
    padding: 20px 0;
}
.tree-node {
    display: inline-block;
    padding: 8px 14px; margin: 4px;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.8);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
}
.tree-node:hover { background: rgba(139,0,0,0.1); }
.tree-node.root { background: var(--accent); color: var(--white); font-weight: bold; }
.tree-level { margin: 20px 0; text-align: center; }
.tree-level-label {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(139,0,0,0.1);
    border-radius: var(--radius);
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 8px;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {
    .header-inner { flex-direction: column; text-align: center; }
    .site-nav { justify-content: center; font-size: 0.9rem; gap: 8px; }
    .content-box h1 { font-size: 2.2rem; letter-spacing: 0.4rem; }
    .content-box h2 { font-size: 1.1rem; }
    .nav-links { flex-direction: column; gap: 15px; align-items: center; }
    .form-container { max-width: 100%; padding: 20px; }
    .admin-layout { flex-direction: column; }
    .admin-sidebar { width: 100%; display: flex; flex-wrap: wrap; gap: 4px; }
    .admin-sidebar a { margin-bottom: 0; }
    .card-grid { grid-template-columns: 1fr; }
    .data-table { font-size: 0.85rem; }
    .data-table th, .data-table td { padding: 6px 8px; }
}

@media (max-width: 480px) {
    .seal-box { width: 30px; height: 30px; }
    .seal-text { font-size: 18px; }
    .site-title { font-size: 1rem; }
    .content-box h1 { font-size: 1.8rem; }
    .btn { padding: 10px 24px; font-size: 0.9rem; }
}