.sr-read-progress{position:fixed;top:0;right:0;height:3px;width:0;background:linear-gradient(90deg,#06b6d4,#2563eb);z-index:1100;transition:width .1s linear}.sr-article__hero{padding:56px 0 24px;background:linear-gradient(180deg,#f3f7ff,#fff)}.sr-article__title{margin:12px 0 16px;font-size:clamp(1.75rem,3vw,2.6rem);line-height:1.25;letter-spacing:-.03em;font-weight:800}.sr-article__meta{display:flex;flex-wrap:wrap;gap:12px 18px;color:#64748b;font-size:13.5px;font-weight:600}.sr-article__kw{background:#eff6ff;color:#2563eb;padding:4px 10px;border-radius:999px;font-size:12px}.sr-article__cats a{margin-left:8px;color:#2563eb;font-weight:700;text-decoration:none;font-size:13px}.sr-article__thumb{margin:28px 0 0;border-radius:16px;overflow:hidden}.sr-article__thumb img{width:100%;height:auto;display:block}.sr-breadcrumb{padding:16px 0;font-size:13px;color:#64748b}.sr-breadcrumb a{color:#475569;text-decoration:none;font-weight:600}.sr-article__layout{padding:24px 0 64px}.sr-article__content{font-size:1.05rem;line-height:1.95;color:#334155}.sr-article__content h2{margin:2em 0 .6em;font-size:1.45rem;color:#0b1220}.sr-article__content h3{margin:1.6em 0 .5em;font-size:1.15rem}.sr-article__content p{margin:0 0 1.15em}.sr-article__content img{border-radius:12px;max-width:100%;height:auto}.sr-article__content a{color:#2563eb}.sr-aside-card{background:#fff;border:1px solid #e6eef8;border-radius:14px;padding:18px;margin-bottom:14px;position:sticky;top:88px}.sr-aside-links{list-style:none;margin:10px 0 0;padding:0}.sr-aside-links a{display:block;padding:8px 0;color:#334155;text-decoration:none;font-weight:600;font-size:13.5px;border-bottom:1px solid #f1f5f9}.sr-toc{background:#f8fafc;border:1px solid #e6eef8;border-radius:14px;padding:16px 18px;margin:24px 0}.sr-toc__head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.sr-toc__toggle{border:0;background:#e2e8f0;width:28px;height:28px;border-radius:8px;cursor:pointer}.sr-toc__list{margin:0;padding:0 18px 0 0}.sr-toc__item--h3{margin-right:14px;font-size:.92em}.sr-toc a{color:#1e40af;text-decoration:none;font-weight:600}.sr-share{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:32px 0;padding:16px;border:1px solid #e6eef8;border-radius:12px}.sr-share a{padding:8px 12px;border-radius:8px;background:#f1f5f9;color:#0f172a;text-decoration:none;font-size:13px;font-weight:700}.sr-author{display:flex;gap:16px;padding:20px;border-radius:14px;border:1px solid #e6eef8;margin:28px 0;align-items:flex-start}.sr-author img{border-radius:50%}.sr-related{margin:40px 0}.sr-related__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.sr-related__card{display:flex;flex-direction:column;gap:8px;text-decoration:none;color:inherit;border:1px solid #e6eef8;border-radius:14px;overflow:hidden;background:#fff}.sr-related__card img{width:100%;aspect-ratio:16/10;object-fit:cover}.sr-related__card strong{padding:0 12px;font-size:14px}.sr-related__card span{padding:0 12px 12px;font-size:12px;color:#64748b}.sr-post-nav{display:flex;justify-content:space-between;gap:16px;padding:24px 0 48px;border-top:1px solid #e6eef8}.sr-post-nav a{color:#2563eb;font-weight:700;text-decoration:none}.sr-blog-header{padding:56px 0 32px;background:linear-gradient(180deg,#f3f7ff,#fff);text-align:center}.sr-blog-header h1{margin:8px 0;font-size:clamp(1.6rem,3vw,2.2rem)}.sr-blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:24px 0 48px}.sr-blog-card{background:#fff;border:1px solid #e6eef8;border-radius:16px;overflow:hidden;transition:transform .2s,box-shadow .2s}.sr-blog-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(15,23,42,.08)}.sr-blog-card__thumb img,.sr-blog-card__ph{width:100%;aspect-ratio:16/10;object-fit:cover;display:block;background:#e2e8f0}.sr-blog-card__body{padding:16px 18px 20px}.sr-blog-card__title{margin:8px 0;font-size:1.05rem}.sr-blog-card__title a{color:#0b1220;text-decoration:none}.sr-blog-card__meta{display:flex;gap:12px;font-size:12.5px;color:#64748b;margin-top:10px}.sr-ilink{border-bottom:1px dashed #93c5fd;text-decoration:none;color:#1d4ed8}@media(max-width:960px){.sr-article__layout,.sr-related__grid,.sr-blog-grid{grid-template-columns:1fr}.sr-article__aside{display:none}}.sr-lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:8px 0 32px}.sr-lesson-card{background:#fff;border:1px solid #e6eef8;border-radius:16px;overflow:hidden;transition:transform .25s,box-shadow .25s}.sr-lesson-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(15,23,42,.08)}.sr-lesson-card__thumb{display:block;position:relative;aspect-ratio:16/10;background:#e2e8f0;overflow:hidden}.sr-lesson-card__thumb img{width:100%;height:100%;object-fit:cover}.sr-lesson-card__ph{display:grid;place-items:center;height:100%;font-size:32px;color:#2563eb;background:linear-gradient(135deg,#eff6ff,#e0e7ff)}.sr-lesson-card__badge{position:absolute;top:10px;right:10px;background:#2563eb;color:#fff;font-size:11px;font-weight:800;padding:4px 10px;border-radius:999px}.sr-lesson-card__body{padding:14px 16px 18px}.sr-lesson-card__body h3{margin:0 0 8px;font-size:1rem}.sr-lesson-card__body h3 a{color:#0f172a;text-decoration:none}.sr-lesson-card__meta{display:flex;flex-wrap:wrap;gap:10px;font-size:12.5px;color:#64748b;font-weight:600}.sr-video{position:relative;border-radius:16px;overflow:hidden;background:#0f172a;aspect-ratio:16/9;box-shadow:0 16px 48px rgba(15,23,42,.12)}.sr-video iframe,.sr-video video{position:absolute;inset:0;width:100%;height:100%;border:0}.sr-blog-filters{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 20px}.sr-blog-filters a{text-decoration:none;padding:8px 14px;border-radius:999px;border:1px solid #e6eef8;color:#475569;font-size:13px;font-weight:700;background:#fff}.sr-blog-filters a.is-active,.sr-blog-filters a:hover{background:#eff6ff;color:#1d4ed8;border-color:#bfdbfe}@media(max-width:900px){.sr-lesson-grid{grid-template-columns:1fr}}.sr-comments{padding:24px 0 64px;max-width:720px}.sr-comment-stars{color:#f59e0b;letter-spacing:2px;margin-bottom:6px;font-size:14px}.sr-rating-field select{padding:10px 12px;border-radius:10px;border:1px solid #e6eef8;font:inherit;min-width:160px}.sr-comment-policy{font-size:12.5px;color:#64748b;margin-top:8px}.comment-list{list-style:none;margin:0;padding:0}.comment-body{border:1px solid #e6eef8;border-radius:14px;padding:16px 18px;margin-bottom:12px;background:#fff}.comment-author{font-weight:800}.comment-meta{font-size:12px;color:#94a3b8;margin-bottom:8px}.sr-lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;padding:24px 0 48px}.sr-playlist{list-style:none;margin:12px 0 0;padding:0;max-height:420px;overflow:auto}.sr-playlist li{display:flex;justify-content:space-between;gap:8px;padding:10px 8px;border-bottom:1px solid #f1f5f9;font-size:13px}.sr-playlist a{color:#334155;text-decoration:none;font-weight:600}.sr-playlist .is-current a{color:#2563eb}.sr-playlist span{color:#94a3b8;font-size:11px;flex-shrink:0}.sr-lesson-progress{height:6px;background:#e2e8f0;border-radius:99px;margin-top:14px;overflow:hidden}.sr-lesson-progress>div{height:100%;background:linear-gradient(90deg,#2563eb,#06b6d4);border-radius:99px}.sr-article__layout--wide{grid-template-columns:1fr !important}.sr-article__layout--wide .sr-article__aside{display:none}@media(max-width:960px){.sr-lesson-layout{grid-template-columns:1fr}}html[dir="rtl"] .sr-lesson-layout,body.rtl .sr-lesson-layout{grid-template-columns:300px minmax(0,1fr)}html[dir="rtl"] .sr-lesson-layout>.sr-lesson-main,body.rtl .sr-lesson-layout>*:first-child{order:2}html[dir="rtl"] .sr-lesson-layout>aside,body.rtl .sr-lesson-layout>*:last-child{order:1}

/* Focus reading mode v8.71 */
body.sr-focus-mode .sr-header,
body.sr-focus-mode .sr-footer,
body.sr-focus-mode .sr-related,
body.sr-focus-mode .sr-post-nav,
body.sr-focus-mode .sr-comments,
body.sr-focus-mode #comments,
body.sr-focus-mode .sr-share-bar,
body.sr-focus-mode .widget-area {
  display: none !important;
}
body.sr-focus-mode .sr-article,
body.sr-focus-mode #sr-article-body {
  max-width: 42rem !important;
  margin-left: auto !important;
  margin-right: auto !important;
}
html[data-reader-theme="sepia"] body.sr-focus-mode {
  background: #f4ecd8 !important;
}
html[data-reader-theme="dark"] body.sr-focus-mode {
  background: #0f172a !important;
  color: #e2e8f0 !important;
}
html[data-reader-font="sm"] #sr-article-body { font-size: 0.92rem; }
html[data-reader-font="lg"] #sr-article-body { font-size: 1.12rem; }
html[data-reader-font="xl"] #sr-article-body { font-size: 1.28rem; }
#sr-reader {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: #0f172a; color: #fff; padding: 10px 16px;
  display: flex; gap: 8px; align-items: center; justify-content: center; flex-wrap: wrap;
}
#sr-reader[hidden] { display: none !important; }
.sr-reader-tools .sr-tool-btn,
.sr-cite-btn, .sr-tts-btn, #sr-focus-toggle {
  min-width: 40px; height: 40px; border-radius: 12px; border: 1px solid #e2e8f0;
  background: #fff; cursor: pointer; font-weight: 700;
}
.sr-tool-btn.is-active, #sr-focus-toggle.is-active, .sr-tts-btn[aria-pressed="true"] {
  background: #2563eb; color: #fff; border-color: #2563eb;
}