/* ============================================================
   风场计算结果展示站 · 样式
   纯静态零依赖；配色与风场花粉工具站同族（蓝青主色）
   ============================================================ */

:root {
  --c-primary: #1663c7;
  --c-primary-dark: #0e4a99;
  --c-accent: #14b8a6;
  --c-bg: #f5f8fc;
  --c-card: #ffffff;
  --c-text: #1f2937;
  --c-muted: #6b7280;
  --c-border: #e5e9f0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(15, 40, 80, .08), 0 4px 14px rgba(15, 40, 80, .06);
  --shadow-hover: 0 4px 10px rgba(15, 40, 80, .12), 0 10px 28px rgba(15, 40, 80, .12);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.65;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 头部 ---------- */

.site-header {
  background: linear-gradient(135deg, var(--c-primary-dark) 0%, var(--c-primary) 55%, var(--c-accent) 130%);
  color: #fff;
  padding: 34px 0 30px;
}

.header-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: 1px;
}

.subtitle {
  margin: 6px 0 0;
  font-size: 14px;
  opacity: .85;
}

.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 14px;
  text-decoration: none;
  transition: all .2s ease;
}

.btn-outline {
  border: 1px solid rgba(255, 255, 255, .65);
  color: #fff;
  background: rgba(255, 255, 255, .08);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, .2);
}

/* ---------- 筛选栏 ---------- */

.toolbar {
  margin: 26px 0 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.tag-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag-btn {
  border: 1px solid var(--c-border);
  background: var(--c-card);
  color: var(--c-muted);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: all .18s ease;
}

.tag-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }

.tag-btn.active {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}

.stat-line {
  font-size: 13px;
  color: var(--c-muted);
}

/* ---------- 分组与卡片 ---------- */

.group-section { margin: 26px 0 10px; }

.group-title {
  font-size: 19px;
  margin: 0 0 4px;
  padding-left: 12px;
  border-left: 4px solid var(--c-primary);
}

.group-sub {
  margin: 0 0 14px 16px;
  font-size: 13px;
  color: var(--c-muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.card {
  background: var(--c-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  cursor: zoom-in;
  transition: transform .18s ease, box-shadow .18s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.card-img {
  width: 100%;
  aspect-ratio: 1344 / 768;
  object-fit: cover;
  display: block;
  background: #eef2f7;
}

.card-body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.card-title {
  margin: 0;
  font-size: 16px;
}

.card-desc {
  margin: 0;
  font-size: 13.5px;
  color: var(--c-muted);
  flex: 1;
}

.card-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.badge {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  background: #e8f0fe;
  color: var(--c-primary);
}

.badge-date {
  background: #e6faf7;
  color: #0f8f82;
}

/* ---------- 说明区 ---------- */

.notice {
  margin: 34px 0 10px;
  padding: 14px 18px;
  background: #fff8e6;
  border: 1px solid #f2e3b3;
  border-radius: var(--radius);
  font-size: 13.5px;
  color: #7a5d12;
}

.notice p { margin: 0; }

/* ---------- 页脚 ---------- */

.site-footer {
  margin-top: 36px;
  padding: 22px 0 30px;
  border-top: 1px solid var(--c-border);
  background: #fff;
}

.footer-inner p { margin: 4px 0; font-size: 13.5px; }

.muted { color: var(--c-muted); font-size: 12.5px; }

.site-footer a { color: var(--c-primary); }

/* ---------- 大图预览 ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

/* hidden 属性优先级必须高于上面的 display:flex（否则弹窗初始即显示） */
.lightbox[hidden] { display: none; }

.lightbox-mask {
  position: absolute;
  inset: 0;
  background: rgba(12, 22, 38, .78);
}

.lightbox-body {
  position: relative;
  margin: 0;
  max-width: 960px;
  width: 100%;
  max-height: 92vh;
  overflow: auto;
  background: var(--c-card);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .4);
}

.lightbox-body img {
  width: 100%;
  border-radius: 8px;
  display: block;
}

.lightbox-body figcaption h3 { margin: 12px 0 6px; font-size: 17px; }
.lightbox-body figcaption p { margin: 4px 0; font-size: 14px; }

.lightbox-close {
  position: absolute;
  top: 10px;
  right: 12px;
  border: none;
  background: rgba(15, 40, 80, .55);
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
}

.lightbox-close:hover { background: rgba(15, 40, 80, .8); }

/* ---------- 响应式 ---------- */

@media (max-width: 640px) {
  .brand h1 { font-size: 21px; }
  .header-inner { align-items: flex-start; flex-direction: column; }
  .card-grid { grid-template-columns: 1fr; }
}