/* anti-crawl-demo · 全站样式（无任何框架依赖） */
:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --brand: #2f6fed;
  --brand-2: #12b886;
  --line: #e5e7eb;
  --warn: #f59e0b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.75 -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 18px; }

.site-header {
  background: linear-gradient(120deg, #ffffff 0%, #eef3ff 60%, #e9fbf3 100%);
  border-bottom: 1px solid var(--line);
  /* 背景层引用了站内图片（相对路径），用于测试 CSS 资源发现 */
  background-image: url(../img/11.png);
  background-size: 64px 64px;
  background-repeat: repeat;
  background-blend-mode: soft-light;
}

.site-header .wrap { display: flex; align-items: center; gap: 20px; height: 68px; }

.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--text); }
.logo img { width: 34px; height: 34px; border-radius: 8px; }

.nav { display: flex; gap: 18px; flex: 1; flex-wrap: wrap; }
.nav a { color: #374151; font-weight: 500; }
.nav a:hover { color: var(--brand); }

.search { display: flex; gap: 6px; }
.search input { border: 1px solid var(--line); border-radius: 6px; padding: 6px 10px; width: 168px; }
.search button { border: 0; background: var(--brand); color: #fff; border-radius: 6px; padding: 6px 12px; cursor: pointer; }

main { padding: 22px 0 40px; }
.layout { display: flex; gap: 22px; align-items: flex-start; }
.col-main { flex: 1; min-width: 0; }
.col-side { width: 300px; flex: 0 0 300px; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin-bottom: 16px; }
.card h2 { margin: 0 0 12px; font-size: 17px; }
.card h3 { margin: 16px 0 8px; font-size: 16px; }

.hero { background: linear-gradient(135deg, #2f6fed, #12b886); color: #fff; border: 0; }
.hero h1 { margin: 0 0 6px; font-size: 26px; }
.hero p { margin: 0; opacity: .92; }

.post-list { display: grid; gap: 12px; }
.post-item { display: flex; gap: 14px; padding: 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.post-item .thumb { width: 132px; flex: 0 0 132px; }
.post-item .thumb img { width: 132px; height: 88px; object-fit: cover; border-radius: 8px; background: #eef1f5; }
.post-item .meta { color: var(--muted); font-size: 12.5px; margin-top: 6px; }
.post-item h3 { margin: 0 0 6px; font-size: 16.5px; }
.post-item p { margin: 0; color: #4b5563; font-size: 14px; }

.article-body p { margin: 0 0 14px; }
.article-body figure { margin: 18px 0; }
.article-body figcaption { color: var(--muted); font-size: 13px; text-align: center; margin-top: 6px; }
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.gallery img { width: 100%; border-radius: 8px; background: #eef1f5; }

.breadcrumb { color: var(--muted); font-size: 13px; margin-bottom: 10px; }
.breadcrumb a { color: var(--muted); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a { background: #eef2ff; color: #3b4a6b; border-radius: 999px; padding: 4px 12px; font-size: 13px; }

.pager { display: flex; gap: 10px; justify-content: center; margin: 18px 0 0; flex-wrap: wrap; }
.pager a, .pager span { border: 1px solid var(--line); background: #fff; border-radius: 6px; padding: 5px 11px; font-size: 14px; }
.pager .current { background: var(--brand); color: #fff; border-color: var(--brand); }

.comment { border-top: 1px dashed var(--line); padding: 10px 0; }
.comment .who { font-weight: 600; font-size: 14px; }
.comment .when { color: var(--muted); font-size: 12px; margin-left: 8px; }

.site-footer { border-top: 1px solid var(--line); background: #fff; padding: 18px 0; color: var(--muted); font-size: 13px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.attachment { border: 1px dashed var(--brand-2); border-radius: 8px; padding: 10px 12px; background: #f3fdf9; }

.hidden { display: none; }
.muted { color: var(--muted); }
.right { float: right; }

/* 挑战页 */
#challenge-box { max-width: 620px; margin: 60px auto; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 28px; }
#challenge-box h1 { font-size: 20px; margin: 0 0 10px; }
.spinner { width: 22px; height: 22px; border: 3px solid #dbe3f4; border-top-color: var(--brand); border-radius: 50%; display: inline-block; vertical-align: -4px; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 验证码组件 */
.cap-wrap { max-width: 560px; margin: 40px auto; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin: 14px 0; }
.cap-grid canvas { width: 100%; height: auto; border-radius: 8px; cursor: pointer; border: 2px solid transparent; background: #f1f3f7; }
.cap-grid canvas.sel { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(47, 111, 237, .18); }
.cap-tip { color: var(--muted); font-size: 13.5px; }
.cap-actions { display: flex; gap: 10px; align-items: center; margin-top: 10px; }
.cap-actions button { border: 0; background: var(--brand); color: #fff; border-radius: 8px; padding: 8px 16px; cursor: pointer; font-size: 14px; }
.cap-actions button[disabled] { background: #c7cede; cursor: not-allowed; }
.cap-msg { color: #c92a2a; font-size: 13.5px; min-height: 20px; }

@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .col-side { width: 100%; flex: 1 1 auto; }
  .post-item { flex-direction: column; }
  .post-item .thumb, .post-item .thumb img { width: 100%; }
}