/* ============================================
   山水集 · 风景分享网站模板样式
   ============================================ */
:root {
    --primary: #2f6f5e;
    --primary-dark: #245446;
    --accent: #e8a33d;
    --bg: #f7f6f2;
    --card-bg: #ffffff;
    --text: #2c332f;
    --text-light: #6b7470;
    --radius: 14px;
    --shadow: 0 2px 12px rgba(44, 51, 47, .08);
    --shadow-hover: 0 8px 24px rgba(44, 51, 47, .16);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

a { color: var(--primary); text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- 页头 ---------- */
.site-header {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    position: sticky; top: 0; z-index: 100;
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 62px;
}
.logo {
    font-size: 20px; font-weight: 700; color: var(--primary-dark);
}
.main-nav { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.main-nav a { color: var(--text); font-size: 15px; }
.main-nav a:hover { color: var(--primary); }
.main-nav .nav-admin {
    background: var(--primary); color: #fff;
    padding: 5px 14px; border-radius: 999px; font-size: 13px;
}

/* ---------- Hero 横幅 ---------- */
.hero {
    position: relative;
    padding: 84px 20px;
    text-align: center;
    color: #fff;
    background:
        linear-gradient(rgba(20, 48, 40, .55), rgba(20, 48, 40, .65)),
        url('https://picsum.photos/seed/scenery-hero/1600/700') center/cover no-repeat;
}
.hero h1 { font-size: 40px; letter-spacing: 4px; margin-bottom: 12px; }
.hero p { font-size: 17px; opacity: .92; }

/* ---------- 分类筛选 ---------- */
.cat-bar {
    display: flex; gap: 10px; flex-wrap: wrap; justify-content: center;
    padding: 26px 0 6px;
}
.cat-bar a {
    padding: 6px 18px; border-radius: 999px;
    background: var(--card-bg); color: var(--text-light);
    border: 1px solid #e5e3dd; font-size: 14px;
    transition: all .2s;
}
.cat-bar a:hover, .cat-bar a.active {
    background: var(--primary); color: #fff; border-color: var(--primary);
}

/* ---------- 图片网格 ---------- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 22px;
    padding: 26px 0 50px;
}
.photo-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform .25s, box-shadow .25s;
    display: flex; flex-direction: column;
}
.photo-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.photo-card .thumb {
    aspect-ratio: 4 / 3; overflow: hidden;
}
.photo-card .thumb img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform .4s;
}
.photo-card:hover .thumb img { transform: scale(1.06); }
.photo-card .info { padding: 14px 16px 16px; }
.photo-card .cat-tag {
    display: inline-block; font-size: 12px; color: var(--primary);
    background: rgba(47, 111, 94, .1);
    padding: 2px 10px; border-radius: 999px; margin-bottom: 6px;
}
.photo-card h3 { font-size: 16px; margin-bottom: 4px; }
.photo-card h3 a { color: var(--text); }
.photo-card .meta {
    font-size: 12.5px; color: var(--text-light);
    display: flex; gap: 14px;
}

/* ---------- 详情页 ---------- */
.detail-wrap {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 30px auto 50px;
    overflow: hidden;
    max-width: 900px;
}
.detail-wrap .big-img { width: 100%; max-height: 620px; object-fit: contain; background: #111; }
.detail-body { padding: 26px 32px 30px; }
.detail-body h1 { font-size: 26px; margin-bottom: 8px; }
.detail-body .detail-meta {
    color: var(--text-light); font-size: 13.5px; margin-bottom: 18px;
    display: flex; gap: 18px; flex-wrap: wrap;
}
.detail-body .desc { color: #4a524e; white-space: pre-wrap; }
.detail-nav {
    display: flex; justify-content: space-between; gap: 12px;
    margin-top: 26px; padding-top: 18px; border-top: 1px solid #eee;
}
.detail-nav a {
    padding: 8px 18px; border-radius: 8px; background: var(--bg);
    font-size: 14px; max-width: 46%;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.detail-nav a:hover { background: var(--primary); color: #fff; }

/* ---------- 空状态 ---------- */
.empty {
    text-align: center; padding: 80px 0; color: var(--text-light);
}
.empty .icon { font-size: 52px; margin-bottom: 12px; }

/* ---------- 表单 / 后台 ---------- */
.panel {
    background: var(--card-bg); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 30px;
    max-width: 560px; margin: 40px auto 60px;
}
.panel h2 { margin-bottom: 18px; font-size: 20px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; margin-bottom: 6px; color: var(--text-light); }
.form-group input[type="text"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%; padding: 10px 12px;
    border: 1px solid #ddd; border-radius: 8px;
    font-size: 14px; font-family: inherit; background: #fbfaf8;
}
.form-group textarea { min-height: 90px; resize: vertical; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none; border-color: var(--primary);
}
.btn {
    display: inline-block; border: none; cursor: pointer;
    background: var(--primary); color: #fff;
    padding: 10px 26px; border-radius: 8px; font-size: 15px;
    transition: background .2s;
}
.btn:hover { background: var(--primary-dark); }
.btn-danger { background: #c0564a; }
.btn-danger:hover { background: #a33f34; }
.btn-sm { padding: 5px 14px; font-size: 13px; }
.msg { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.msg-ok { background: #e8f5ee; color: #21694a; }
.msg-err { background: #fdeeee; color: #a33f34; }

.admin-list { max-width: 900px; margin: 40px auto 60px; }
.admin-row {
    display: flex; align-items: center; gap: 16px;
    background: var(--card-bg); border-radius: 10px;
    box-shadow: var(--shadow); padding: 12px 16px; margin-bottom: 12px;
}
.admin-row img { width: 88px; height: 62px; object-fit: cover; border-radius: 6px; }
.admin-row .grow { flex: 1; }
.admin-row h4 { font-size: 15px; }
.admin-row .meta { font-size: 12.5px; color: var(--text-light); }
.admin-actions { display: flex; gap: 8px; }

/* ---------- 页脚 ---------- */
.site-footer {
    background: #22302b; color: #b9c4bf;
    text-align: center; padding: 26px 0; margin-top: 30px;
    font-size: 13.5px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
    .hero h1 { font-size: 28px; }
    .header-inner { flex-direction: column; height: auto; padding: 10px 0; gap: 8px; }
    .detail-body { padding: 20px 18px; }
}