/* ==========================================================================
   gpt0424.com 博客 / 教程 内页样式
   --------------------------------------------------------------------------
   ★ 规范：内页同时引入 /styles.css（共用设计变量 + 极光背景 + 按钮）和本文件。
     本文件只放内页专属组件，不再重复定义设计变量和背景，保证与主页完全一致。
   ========================================================================== */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
/* body 背景、字体、颜色等均由 /styles.css 提供（含极光网格背景 .bg-deco/.bg-mesh）。
   内页正文行距略大，单独覆盖一下即可。 */
body { line-height: 1.8; }
/* 仅文章正文里的链接用蓝色（避免影响导航/卡片/页脚链接的样式） */
.article-body a { color: var(--blue-600); }
.article-body a:hover { text-decoration: underline; }

.shell { width: 100%; max-width: 760px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }
.shell-wide { max-width: 1200px; }

/* 顶栏 */
.blog-topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: background 320ms ease, border-color 320ms ease, box-shadow 320ms ease;
}
.blog-topbar.is-scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: rgba(15, 23, 42, 0.06);
  box-shadow:
    0 8px 28px -10px rgba(15, 23, 42, 0.10),
    0 1px 0 rgba(255, 255, 255, 0.5) inset,
    0 0 0 1px rgba(255, 255, 255, 0.4) inset;
}
.blog-topbar-inner {
  width: min(var(--shell), calc(100% - 48px)); margin: 0 auto; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  transition: height 320ms cubic-bezier(0.22, 1, 0.36, 1);
}
.blog-topbar.is-scrolled .blog-topbar-inner { height: 60px; }
.blog-brand { display: inline-flex; align-items: center; gap: 10px; margin-right: auto; }
.blog-brand-mark { width: 30px; height: 30px; }
.blog-brand-name { font-weight: 800; font-size: 1.15rem; color: var(--ink-1); letter-spacing: -0.015em; }
.blog-brand-name em {
  font-style: normal; font-weight: 900;
  background: linear-gradient(90deg, #3B82F6, #8B5CF6);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.blog-nav-cta {
  margin-left: 10px;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: 999px;
  background: linear-gradient(135deg, var(--ink-1) 0%, #1E293B 100%);
  color: #fff !important; font-size: 0.86rem; font-weight: 700;
  text-decoration: none !important;
  box-shadow:
    0 6px 16px -3px rgba(15, 23, 42, 0.30),
    0 0 0 1.5px rgba(255, 255, 255, 0.7),
    inset 0 1px 0 rgba(255, 255, 255, 0.10);
  transition: background .18s, transform .18s, box-shadow .18s;
}
.blog-nav-cta:hover {
  transform: translateY(-1px);
  background: linear-gradient(135deg, #1E293B 0%, #334155 100%);
  box-shadow:
    0 10px 22px -4px rgba(15, 23, 42, 0.40),
    0 0 0 1.5px rgba(255, 255, 255, 0.85),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
}
.blog-nav-cta svg { width: 14px; height: 14px; flex-shrink: 0; }

/* 内页导航链接（首页 / 套餐 / 博客）— 与首页 .nav 完全一致(含滑动指示器) */
.blog-nav { display: flex; align-items: center; gap: 2px; position: relative; }
.blog-nav-indicator {
  position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 0; height: 32px; border-radius: 999px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.10), rgba(139, 92, 246, 0.10));
  border: 1px solid rgba(59, 130, 246, 0.18);
  opacity: 0; pointer-events: none;
  transition:
    transform 380ms cubic-bezier(0.22, 1, 0.36, 1),
    width 380ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 240ms ease;
  z-index: 0;
}
.blog-nav-indicator.is-visible { opacity: 1; }
.blog-nav a {
  position: relative; z-index: 1;
  padding: 8px 14px; border-radius: 999px;
  font-size: 0.92rem; font-weight: 500;
  color: var(--ink-3) !important; text-decoration: none !important;
  transition: color 220ms ease, transform 220ms ease;
}
.blog-nav a:hover { color: var(--ink-1) !important; transform: translateY(-1px); }
.blog-nav a.is-active { color: var(--blue-700) !important; font-weight: 600; }
.blog-nav-right { display: flex; align-items: center; gap: 10px; }
.blog-menu-toggle { display: none; }
@media (max-width: 768px) {
  /* 手机端:只保留带 nav-key 的入口(博客),隐藏首页(logo 可回首页)和套餐锚点 */
  .blog-nav a:not(.nav-key) { display: none; }
  .blog-nav { gap: 2px; }
  .blog-nav a { padding: 7px 12px; font-size: 0.9rem; }
}

/* 面包屑 */
.breadcrumb { font-size: 0.84rem; color: var(--ink-4); margin: 28px 0 0; }
.breadcrumb a { color: var(--ink-3); }
.breadcrumb span { margin: 0 6px; }

/* 文章 */
.article { padding: 24px 0 60px; }
.article-header { margin: 16px 0 32px; }
.article-tag {
  display: inline-block; padding: 4px 12px; margin-bottom: 14px;
  background: var(--blue-50); color: var(--blue-700);
  border-radius: 999px; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.04em;
}
.article h1 {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 800; line-height: 1.3; letter-spacing: -0.02em;
  color: var(--ink-1); margin: 0 0 14px;
}
.article-meta { font-size: 0.86rem; color: var(--ink-4); }
.article-meta span { margin-right: 14px; }

.article-brief {
  display: grid;
  gap: 14px;
  margin: -8px 0 28px;
  padding: 20px 22px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line-1);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
}
.article-brief-main p {
  margin: 6px 0 0;
  color: var(--ink-2);
  font-size: 0.98rem;
  line-height: 1.75;
}
.article-brief-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--blue-700);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.article-brief-block ul {
  display: grid;
  gap: 7px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}
.article-brief-block li {
  position: relative;
  margin: 0;
  padding-left: 18px;
  color: var(--ink-2);
  font-size: 0.92rem;
  line-height: 1.65;
}
.article-brief-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
}

.article-body { font-size: 1.02rem; }
.article-body h2 {
  font-size: 1.4rem; font-weight: 800; color: var(--ink-1);
  margin: 40px 0 14px; padding-top: 8px; letter-spacing: -0.01em;
  scroll-margin-top: 80px;
}
.article-body h3 {
  font-size: 1.12rem; font-weight: 700; color: var(--ink-1);
  margin: 28px 0 10px;
}
.article-body p { margin: 0 0 18px; }
.article-body ul, .article-body ol { margin: 0 0 18px; padding-left: 24px; }
.article-body li { margin-bottom: 8px; }
.article-body strong { color: var(--ink-1); font-weight: 700; }
.article-body a { font-weight: 600; }

/* 提示框 */
.callout {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 18px 20px; margin: 24px 0;
  background: linear-gradient(135deg, rgba(59,130,246,0.06), rgba(139,92,246,0.06));
  border: 1px solid rgba(99,102,241,0.15); border-radius: 14px;
  font-size: 0.95rem;
}
.callout-icon { flex-shrink: 0; font-size: 1.3rem; line-height: 1.5; }

/* 表格 */
.article-body table {
  width: 100%; border-collapse: collapse; margin: 24px 0;
  font-size: 0.92rem; background: var(--bg-card);
  border-radius: 14px; overflow: hidden; box-shadow: var(--shadow-sm);
}
.article-body th, .article-body td {
  padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--line-1);
}
.article-body th { background: var(--blue-50); font-weight: 700; color: var(--ink-1); }
.article-body tr:last-child td { border-bottom: 0; }

/* 文末 CTA */
.article-cta {
  margin: 40px 0 0; padding: 32px;
  background: linear-gradient(135deg, rgba(201,184,255,0.18), rgba(168,200,255,0.18));
  border: 1px solid rgba(99,102,241,0.15); border-radius: var(--radius-lg);
  text-align: center;
}
.article-cta h3 { font-size: 1.25rem; font-weight: 800; color: var(--ink-1); margin: 0 0 8px; }
.article-cta p { font-size: 0.95rem; color: var(--ink-2); margin: 0 0 20px; }
.article-cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px;
  background: linear-gradient(180deg, #3D8AF7, var(--blue-600));
  background-clip: padding-box; -webkit-background-clip: padding-box;
  color: #fff !important; font-weight: 700; font-size: 1rem;
  text-decoration: none !important;
  box-shadow: 0 6px 16px -2px rgba(59, 130, 246, 0.4);
  transition: transform 160ms ease;
}
.article-cta-btn:hover { transform: translateY(-2px); }

/* 相关文章 */
.related { margin: 48px 0 0; }
.related h2 { font-size: 1.2rem; font-weight: 800; color: var(--ink-1); margin: 0 0 16px; }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.related-card {
  display: block; padding: 18px 20px;
  background: var(--bg-card); border: 1px solid var(--line-1);
  border-radius: 14px; box-shadow: var(--shadow-sm);
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.related-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); text-decoration: none; }
.related-card-title { font-size: 0.98rem; font-weight: 700; color: var(--ink-1); margin-bottom: 4px; }
.related-card-desc { font-size: 0.84rem; color: var(--ink-3); }

/* ============================================================================
   博客列表页 · GPT Plus 充值知识库 (v6.0)
   --------------------------------------------------------------------------
   Hero 知识库头部 + 搜索/分类工具条 + 两列指南卡 + 加载更多。
   共用 tokens.css 的设计变量与全站极光背景,此处只放列表页专属组件。
   ========================================================================== */
.bloglist { padding: 32px 0 60px; }

/* ---------- Hero · GPT Plus 充值知识库 ---------- */
.bloglist-hero {
  position: relative; isolation: isolate; overflow: hidden;
  margin: 22px 0 30px; padding: 44px 28px 30px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: linear-gradient(180deg, rgba(255,255,255,0.62), rgba(255,255,255,0.40));
  box-shadow: 0 24px 60px -28px rgba(59, 130, 246, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.7);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.blh-deco { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.blh-orb { position: absolute; border-radius: 50%; filter: blur(46px); opacity: 0.55; }
.blh-orb-a { width: 300px; height: 300px; left: -70px; top: -120px;
  background: radial-gradient(circle, rgba(201,184,255,0.9), rgba(255,192,217,0.35) 60%, transparent 72%); }
.blh-orb-b { width: 320px; height: 320px; right: -90px; top: -100px;
  background: radial-gradient(circle, rgba(168,200,255,0.9), rgba(181,228,255,0.30) 60%, transparent 72%); }
.blh-glow { position: absolute; left: 50%; top: 6%; width: 60%; height: 120px; transform: translateX(-50%);
  background: radial-gradient(60% 100% at 50% 0%, rgba(6,182,212,0.18), transparent 70%); }
.blh-grid { position: absolute; inset: 0; opacity: 0.5;
  background-image:
    linear-gradient(to right, rgba(15,23,42,0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15,23,42,0.045) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 35%, transparent 78%);
          mask-image: radial-gradient(120% 90% at 50% 0%, #000 35%, transparent 78%);
}
.blh-inner { position: relative; text-align: center; max-width: 760px; margin: 0 auto; }
.blh-eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 14px; margin-bottom: 16px;
  font-size: 0.78rem; font-weight: 700; color: var(--ink-2);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid; border-image: linear-gradient(120deg, rgba(59,130,246,0.45), rgba(139,92,246,0.45)) 1;
  border-radius: 999px; box-shadow: 0 4px 14px -6px rgba(59, 130, 246, 0.3);
}
.blh-dot { width: 7px; height: 7px; border-radius: 50%;
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.14);
  animation: blhPulse 2.4s ease-in-out infinite; }
@keyframes blhPulse { 0%,100%{ box-shadow:0 0 0 3px rgba(59,130,246,0.16);} 50%{ box-shadow:0 0 0 6px rgba(59,130,246,0.05);} }
.blh-title { font-size: clamp(1.9rem, 5vw, 2.7rem); font-weight: 800; line-height: 1.18;
  letter-spacing: -0.02em; color: var(--ink-1); margin: 0 0 12px; }
.blh-title em { font-style: normal;
  background: linear-gradient(100deg, #3B82F6, #8B5CF6);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent; }
.blh-sub { color: var(--ink-3); font-size: clamp(0.94rem, 2.4vw, 1.04rem); line-height: 1.7; margin: 0 auto; max-width: 600px; }

/* ---------- 工具条:搜索 + 分类(渐进增强:无 JS 整体隐藏) ---------- */
.bloglist-tools { display: none; margin-top: 24px; }
html.js .bloglist-tools { display: block; }
.blh-search { position: relative; max-width: 540px; margin: 0 auto 16px; }
.blh-search-ic { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--ink-4); pointer-events: none; }
.blh-search-input {
  width: 100%; height: 50px; padding: 0 46px 0 44px;
  font-size: 0.96rem; color: var(--ink-1); font-family: inherit;
  background: rgba(255, 255, 255, 0.86); border: 1px solid var(--line-2); border-radius: 999px;
  box-shadow: 0 6px 18px -10px rgba(15, 23, 42, 0.18), inset 0 1px 0 rgba(255,255,255,0.6);
  outline: none; -webkit-appearance: none; appearance: none;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.blh-search-input::placeholder { color: var(--ink-4); }
.blh-search-input::-webkit-search-cancel-button { -webkit-appearance: none; appearance: none; }
.blh-search-input:focus { background: #fff; border-color: var(--blue-500);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.14), 0 10px 24px -12px rgba(59,130,246,0.30); }
.blh-search-clear {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center;
  border: 0; border-radius: 50%; cursor: pointer; color: var(--ink-3);
  background: var(--bg-tint); transition: background .18s, color .18s;
}
.blh-search-clear svg { width: 15px; height: 15px; }
.blh-search-clear:hover { background: var(--line-2); color: var(--ink-1); }
.blh-chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.blh-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 14px; min-height: 38px;
  font-family: inherit; font-size: 0.86rem; font-weight: 600; cursor: pointer; color: var(--ink-2);
  background: rgba(255, 255, 255, 0.72); border: 1px solid var(--line-2); border-radius: 999px;
  -webkit-tap-highlight-color: transparent;
  transition: color .18s, background .18s, border-color .18s, transform .18s, box-shadow .18s;
}
.blh-chip:hover { transform: translateY(-1px); border-color: rgba(59,130,246,0.4); color: var(--ink-1); }
.blh-chip-n { font-size: 0.72rem; font-weight: 700; line-height: 1; padding: 3px 6px; border-radius: 999px;
  color: var(--ink-4); background: var(--bg-tint); transition: color .18s, background .18s; }
.blh-chip.is-active { color: #fff; border-color: transparent;
  background: linear-gradient(135deg, #3B82F6, #6366F1); box-shadow: 0 8px 18px -8px rgba(59,130,246,0.55); }
.blh-chip.is-active .blh-chip-n { color: #fff; background: rgba(255,255,255,0.22); }
.blh-count { margin: 16px 0 0; font-size: 0.84rem; color: var(--ink-4); text-align: center; }
.blh-count b { color: var(--ink-2); font-weight: 700; }

/* ---------- 指南卡网格 ---------- */
.post-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
/* 渐进增强:JS 接管前先用 nth 隐藏首屏外卡片,杜绝闪烁;接管后改由 .is-hidden 控制 */
html.js .post-grid:not(.is-ready) .post-card:nth-of-type(n+13) { display: none; }
.post-card.is-hidden { display: none; }

.post-card {
  position: relative; display: flex; flex-direction: column; overflow: hidden;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.6); border-radius: var(--radius-lg);
  box-shadow: 0 2px 10px -6px rgba(15,23,42,0.12), 0 10px 30px -22px rgba(15,23,42,0.18);
  transition: transform .22s cubic-bezier(.22,1,.36,1), box-shadow .22s ease, border-color .22s ease;
  text-decoration: none !important;
}
.post-card:hover { transform: translateY(-4px); border-color: rgba(99,102,241,0.28);
  box-shadow: 0 18px 40px -18px rgba(59,130,246,0.30), 0 6px 16px -10px rgba(15,23,42,0.12); }
.post-card:hover h2 { color: var(--blue-700); }

/* 封面 */
.post-cover { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.post-cover img, .post-cover-ph { transition: transform .35s cubic-bezier(.22,1,.36,1); }
.post-card:hover .post-cover img, .post-card:hover .post-cover-ph { transform: scale(1.04); }
.post-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 程序化「情报封面」(无 cover 图时):渐变 + 网格 + 柔光 + 分类字形 + 阅读标签 */
.post-cover-ph { position: relative; width: 100%; height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--c1, #3B82F6), var(--c2, #6366F1)); }
.post-cover-ph::before { content: ""; position: absolute; inset: 0; opacity: 0.5;
  background-image:
    linear-gradient(rgba(255,255,255,0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.16) 1px, transparent 1px);
  background-size: 22px 22px; }
.post-cover-ph::after { content: ""; position: absolute; inset: 0;
  background: radial-gradient(70% 80% at 82% 12%, rgba(255,255,255,0.4), transparent 60%); }
.cover-glyph { position: absolute; left: 16px; top: 14px; width: 30px; height: 30px; color: rgba(255,255,255,0.78); z-index: 1; }
.cover-label { position: relative; z-index: 1; color: #fff; font-weight: 800; font-size: 1.18rem;
  letter-spacing: 0.06em; text-align: center; padding: 0 18px; text-shadow: 0 2px 12px rgba(0,0,0,0.22); }
.cover-read { position: relative; z-index: 1; margin-top: 10px;
  font-size: 0.74rem; font-weight: 600; color: #fff; letter-spacing: .02em;
  padding: 4px 11px; border-radius: 999px;
  background: rgba(255,255,255,0.18); border: 1px solid rgba(255,255,255,0.32);
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }

/* 重点指南角标 + 首篇渐变描边 */
.post-flag { position: absolute; right: 12px; top: 12px; z-index: 2;
  display: inline-flex; align-items: center; gap: 5px; padding: 5px 11px; border-radius: 999px;
  font-size: 0.74rem; font-weight: 800; letter-spacing: .02em; color: #fff;
  background: linear-gradient(135deg, #F472B6, #8B5CF6); box-shadow: 0 6px 16px -6px rgba(139,92,246,0.6); }
.post-flag::before { content: "★"; font-size: 0.72rem; }
.post-card.is-featured { border-color: transparent;
  background:
    linear-gradient(rgba(255,255,255,0.86), rgba(255,255,255,0.86)) padding-box,
    linear-gradient(135deg, #3B82F6, #8B5CF6 55%, #EC4899) border-box; }
.post-grid.is-filtered .post-flag { display: none; }
.post-grid.is-filtered .post-card.is-featured { border-color: rgba(255,255,255,0.6); background: rgba(255,255,255,0.72); }

/* 卡片正文 */
.post-card-body { padding: 16px 18px; display: flex; flex-direction: column; flex: 1; }
.pc-tag { display: inline-flex; align-items: center; gap: 6px; align-self: flex-start;
  margin-bottom: 10px; padding: 5px 11px; border-radius: 999px;
  font-size: 0.74rem; font-weight: 700; letter-spacing: .01em; }
.pc-tag svg { width: 14px; height: 14px; }
.pc-tag--news   { color: #4338CA; background: #EEF2FF; }
.pc-tag--safety { color: #BE123C; background: #FFF1F3; }
.pc-tag--tip    { color: #6D28D9; background: #F5F3FF; }
.pc-tag--guide  { color: var(--blue-700); background: var(--blue-50); }
.pc-tag--help   { color: #475569; background: #F1F5F9; }
.post-card h2 { font-size: 1.12rem; font-weight: 800; color: var(--ink-1);
  margin: 0 0 8px; line-height: 1.45; letter-spacing: -0.01em; transition: color .18s;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.pc-hook { font-size: 0.9rem; color: var(--ink-2); margin: 0 0 8px; line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pc-desc { font-size: 0.88rem; color: var(--ink-3); margin: 0 0 14px; line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pc-desc-key { display: inline-block; margin-right: 7px; padding: 1px 7px;
  font-size: 0.72rem; font-weight: 700; color: var(--blue-700);
  background: var(--blue-50); border-radius: 6px; vertical-align: 1px; }
.post-card-meta { margin-top: auto; padding-top: 12px;
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  border-top: 1px solid var(--line-1); font-size: 0.82rem; color: var(--ink-4); }
.pc-date { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pc-more { display: inline-flex; align-items: center; gap: 4px; flex-shrink: 0;
  font-size: 0.82rem; font-weight: 700; color: var(--ink-4); transition: color .2s; }
.pc-more svg { width: 15px; height: 15px; transition: transform .2s; }
.post-card:hover .pc-more { color: var(--blue-600); }
.post-card:hover .pc-more svg { transform: translateX(3px); }

/* 无结果 / 加载更多 */
.bloglist-empty { text-align: center; color: var(--ink-3); padding: 40px 0; font-size: 0.96rem; }
.bloglist-more { display: flex; justify-content: center; margin: 30px 0 10px; }
.more-btn { display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; cursor: pointer;
  font-family: inherit; font-size: 0.92rem; font-weight: 700; color: var(--ink-1);
  background: rgba(255,255,255,0.82); border: 1px solid var(--line-2);
  box-shadow: 0 6px 18px -10px rgba(15,23,42,0.18); -webkit-tap-highlight-color: transparent;
  transition: transform .18s, box-shadow .18s, border-color .18s, color .18s; }
.more-btn svg { width: 16px; height: 16px; transition: transform .2s; }
.more-btn:hover { transform: translateY(-2px); border-color: rgba(59,130,246,0.4); color: var(--blue-700);
  box-shadow: 0 12px 26px -12px rgba(59,130,246,0.35); }
.more-btn:hover svg { transform: translateY(2px); }

/* 到底提示:全部加载完且有结果时显示「— 已展示全部 N 篇 —」分隔条 */
.bloglist-end { display: flex; align-items: center; gap: 14px;
  max-width: 380px; margin: 28px auto 6px;
  color: var(--ink-4); font-size: 0.85rem; font-weight: 600; letter-spacing: .03em; }
.bloglist-end::before, .bloglist-end::after { content: ""; flex: 1; height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-2), transparent); }

/* 文章目录 TOC（可复用） */
.toc {
  background: var(--bg-card); border: 1px solid var(--line-1);
  border-left: 3px solid var(--blue-500);
  border-radius: var(--radius-lg); padding: 18px 22px; margin: 26px 0;
  box-shadow: var(--shadow-sm);
}
.toc-title { font-weight: 800; color: var(--ink-1); font-size: 0.98rem; margin-bottom: 10px; }
.toc ol { margin: 0; padding-left: 20px; list-style: decimal; }
.toc li { margin: 5px 0; }
.toc a { color: var(--ink-2); font-size: 0.94rem; }
.toc a:hover { color: var(--blue-700); }

/* 文章内 FAQ 列表(卡片式) */
.article-body .faq-item {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line-1);
  border-radius: 14px;
  padding: 18px 22px 18px 56px;
  margin: 12px 0;
  box-shadow: 0 2px 10px -6px rgba(15, 23, 42, 0.08);
  transition: box-shadow .2s ease, border-color .2s ease, transform .2s ease;
}
.article-body .faq-item:hover {
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow: 0 10px 26px -12px rgba(59, 130, 246, 0.22);
  transform: translateY(-1px);
}
.article-body .faq-q {
  font-weight: 700;
  color: var(--ink-1);
  font-size: 1.04rem;
  line-height: 1.5;
  margin: 0 0 8px;
}
/* Q 徽章(圆形,渐变) */
.article-body .faq-q::before {
  content: "Q";
  position: absolute;
  left: 18px;
  top: 18px;
  width: 26px; height: 26px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #3B82F6 0%, #6366F1 100%);
  color: #fff;
  font-weight: 800;
  font-size: 0.84rem;
  border-radius: 8px;
  box-shadow: 0 3px 8px -2px rgba(59, 130, 246, 0.45);
}
.article-body .faq-a {
  position: relative;
  color: var(--ink-2);
  line-height: 1.75;
  padding-left: 26px;
}
/* A 标识 */
.article-body .faq-a::before {
  content: "A";
  position: absolute;
  left: 0; top: 1px;
  width: 20px; height: 20px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--blue-50, #EFF6FF);
  color: var(--blue-600);
  font-weight: 800;
  font-size: 0.74rem;
  border-radius: 6px;
}

/* 锚点跳转时给标题留出顶栏高度 */
.article-body h2[id] { scroll-margin-top: 80px; }

/* 页脚 */
.blog-footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--line-1); background: rgba(241, 245, 249, 0.6);
  padding: 28px 0; text-align: center; font-size: 0.84rem; color: var(--ink-4);
}
.blog-footer a { color: var(--ink-3); }
.blog-footer .disclaimer { max-width: 760px; margin: 12px auto 0; font-size: 0.76rem; line-height: 1.7; }

@media (max-width: 720px) {
  .post-grid { grid-template-columns: 1fr; gap: 16px; }
  .bloglist-hero { margin: 14px 0 24px; padding: 32px 18px 24px; border-radius: var(--radius-lg); }
  .blh-orb-a, .blh-orb-b { filter: blur(38px); opacity: 0.45; }
  .blh-search-input { height: 48px; font-size: 1rem; }   /* 1rem 防 iOS 聚焦缩放 */
  .blh-chips { gap: 7px; }
  .blh-chip { padding: 8px 12px; font-size: 0.84rem; }
  .post-card-body { padding: 14px 16px; }
  .post-card h2 { font-size: 1.06rem; }
}
@media (max-width: 600px) {
  .related-grid { grid-template-columns: 1fr; }
  .article-cta { padding: 24px 20px; }
}
@media (max-width: 380px) {
  /* 极窄屏:计数胶囊收起,只留分类名,避免胶囊换行拥挤 */
  .blh-chip-n { display: none; }
}

/* 减少动态效果偏好:关闭装饰动画与悬停位移 */
@media (prefers-reduced-motion: reduce) {
  .blh-dot { animation: none; }
  .post-card, .post-card:hover { transform: none; }
  .post-card:hover .post-cover img,
  .post-card:hover .post-cover-ph { transform: none; }
  .more-btn:hover, .blh-chip:hover { transform: none; }
}

/* ===================================================================
   文章两栏布局:正文 + 右侧粘性「购买/客服」侧栏(v5.19)
   解决宽屏下内页两侧留白过多;窄屏自动收起侧栏。
   =================================================================== */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: start;
}
.article-layout .article { min-width: 0; }

.article-aside { position: sticky; top: 84px; }
.aside-card {
  background: var(--bg-card);
  border: 1px solid var(--line-1);
  border-radius: 16px;
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  text-align: center;
}
.aside-card-title { margin: 0 0 6px; font-size: 1.05rem; font-weight: 800; color: var(--ink-1); }
.aside-card-sub { margin: 0 0 16px; font-size: 0.85rem; color: var(--ink-3); line-height: 1.6; }
.aside-redeem { display: inline-block; margin-top: 10px; font-size: 0.84rem; color: var(--ink-3); text-decoration: none; }
.aside-redeem:hover { color: var(--blue-600); text-decoration: underline; }
.aside-qr { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line-1); }
.aside-qr-frame {
  width: 148px; height: 148px; margin: 0 auto; padding: 8px;
  background: #fff; border: 1px solid var(--line-1); border-radius: 12px;
}
.aside-qr-frame img { width: 100%; height: 100%; object-fit: contain; display: block; border-radius: 6px; }
.aside-qr-cap { margin: 8px 0 0; font-size: 0.8rem; color: var(--ink-2); line-height: 1.5; }
.aside-qr-cap small { color: var(--ink-4); font-size: 0.74rem; }

@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; gap: 0; }
  .article-aside { display: none; }
}

/* ===================================================================
   品牌页(hub)标题:去掉「01 / PRICING」装饰,改用普通标题 (v5.22)
   =================================================================== */
.hub-head { margin-bottom: 40px; }
.hub-title {
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink-1);
  margin: 0 0 14px;
}
.hub-title-sm { font-size: clamp(1.4rem, 2.6vw, 1.8rem); margin-bottom: 0; }