/* 文章详情页共享样式（SSG 静态页 article_page.html 与降级页 article.html 共用） */
:root{--color-brand:#0052d9;--color-brand-dark:#003da6;--color-accent:#00a4ff;--color-cyan:#7dd3fc;--color-ai:#6366f1;--bg-deep:#020617;--bg-mid:#0a1628;--bg-page:linear-gradient(160deg,#020617 0%,#0a1628 35%,#0c2347 70%,#051a38 100%);--glass-bg:rgba(15,23,42,0.55);--glass-bg-light:rgba(15,23,42,0.38);--glass-border:rgba(255,255,255,0.1);--glass-border-hover:rgba(125,211,252,0.28);--glass-blur:blur(16px);--text-primary:#f1f5f9;--text-secondary:rgba(255,255,255,0.68);--text-dim:rgba(255,255,255,0.45);--text-light:#ffffff;--border:rgba(255,255,255,0.08);--border-light:rgba(255,255,255,0.14);--shadow-lg:0 16px 48px rgba(0,0,0,0.35);--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:20px;--font-sans:'Inter','Noto Sans SC',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;--nav-height:64px;--topbar-height:36px;--container-max:1200px;--section-pad:clamp(48px,6vw,64px);--transition:0.35s cubic-bezier(0.4,0,0.2,1)}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-height) + 12px)}
body{font-family:var(--font-sans);background:var(--bg-deep);color:var(--text-primary);line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.container{width:min(var(--container-max),100% - 2.5rem);margin-inline:auto}
.section{padding:var(--section-pad) 0;position:relative}
.bg-aurora{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.page-bg-mesh{position:absolute;inset:0;background:radial-gradient(ellipse 70% 55% at 15% 40%,rgba(0,82,217,0.35) 0%,transparent 55%),radial-gradient(ellipse 55% 50% at 85% 25%,rgba(0,164,255,0.2) 0%,transparent 50%),radial-gradient(ellipse 45% 40% at 60% 85%,rgba(99,102,241,0.15) 0%,transparent 50%),var(--bg-page)}
.page-bg-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(ellipse 95% 85% at 50% 35%,#000 25%,transparent 82%);mask-image:radial-gradient(ellipse 95% 85% at 50% 35%,#000 25%,transparent 82%)}
.page-bg-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:0.5;animation:orbFloat 12s ease-in-out infinite}
.page-bg-orb:nth-child(3){width:280px;height:280px;background:rgba(0,82,217,0.35);top:10%;left:5%}
.page-bg-orb:nth-child(4){width:260px;height:260px;background:rgba(99,102,241,0.3);top:50%;right:8%;animation-delay:-4s}
.page-bg-orb:nth-child(5){width:220px;height:220px;background:rgba(0,164,255,0.25);bottom:10%;left:40%;animation-delay:-8s}
@keyframes orbFloat{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(30px,-40px) scale(1.08)}66%{transform:translate(-20px,30px) scale(0.95)}}
#particleCanvas{position:fixed;inset:0;z-index:0;pointer-events:none}
.page-wrap{position:relative;z-index:1}
.topbar{background:rgba(2,6,23,0.9);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--border);font-size:0.8rem;color:var(--text-secondary)}
.topbar-inner{max-width:var(--container-max);margin-inline:auto;height:var(--topbar-height);display:flex;align-items:center;justify-content:space-between;padding:0 1.25rem}
.topbar-right{color:rgba(125,211,252,0.7)}
.navbar{position:sticky;top:0;z-index:100;background:rgba(2,6,23,0.85);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--glass-border);transition:box-shadow var(--transition)}
.navbar.scrolled{box-shadow:0 4px 24px rgba(0,0,0,0.3)}
.nav-inner{max-width:var(--container-max);margin-inline:auto;height:var(--nav-height);display:flex;align-items:center;justify-content:space-between;padding:0 1.25rem}
.logo{display:flex;align-items:center;gap:0.5rem;font-weight:700;font-size:1.1rem;color:var(--text-light);position:relative;overflow:hidden}
.logo-mark{width:36px;height:36px;border-radius:8px;background:linear-gradient(135deg,var(--color-brand) 0%,var(--color-accent) 100%);display:flex;align-items:center;justify-content:center;color:white;font-weight:800;font-size:1rem;position:relative;overflow:hidden}
.logo-mark::after{content:'';position:absolute;top:0;left:-100%;width:60%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.5),transparent);animation:logoShine 4.5s ease-in-out infinite}
@keyframes logoShine{0%,100%{left:-100%}50%,55%{left:200%}}
.logo .logo-sub{font-size:11px;font-weight:400;color:var(--text-dim);letter-spacing:0.05em}
.nav-menu{display:flex;gap:32px;align-items:center;list-style:none}
.nav-menu a{font-size:14px;color:var(--text-secondary);transition:color 0.2s;position:relative;padding:6px 0;text-decoration:none}
.nav-menu a:hover{color:var(--text-light)}
.nav-menu a.active{color:var(--color-cyan)}
.nav-cta{background:linear-gradient(135deg,var(--color-brand),var(--color-accent));color:#fff;padding:10px 22px;border-radius:8px;font-size:13px;font-weight:600;transition:transform 0.2s,box-shadow 0.2s;white-space:nowrap;text-decoration:none}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(0,82,217,0.4)}
.nav-mobile-toggle{display:none;background:none;border:none;color:#f1f5f9;font-size:24px;cursor:pointer}
/* ── 文章头部 ── */
.article-hero{position:relative;padding:clamp(40px,5vw,64px) 0 clamp(24px,3vw,36px)}
.article-hero-inner{max-width:860px;margin-inline:auto;padding:0 1.25rem}
.back-link{display:inline-flex;align-items:center;gap:0.4rem;font-size:0.85rem;color:var(--text-dim);margin-bottom:1.5rem;transition:color 0.2s}
.back-link:hover{color:var(--color-cyan)}
.article-cat{display:inline-block;font-size:0.72rem;font-weight:600;color:var(--color-cyan);letter-spacing:0.14em;margin-bottom:1rem;padding:0.3rem 0.9rem;border:1px solid rgba(125,211,252,0.28);border-radius:999px;background:rgba(125,211,252,0.07)}
.article-hero h1{font-size:clamp(1.7rem,4vw,2.5rem);font-weight:800;line-height:1.3;color:var(--text-light);margin-bottom:1.25rem}
.article-meta{display:flex;align-items:center;gap:1.4rem;flex-wrap:wrap;font-size:0.85rem;color:var(--text-dim)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:0.4rem}
/* ── 正文卡片 ── */
.article-card-wrap{max-width:860px;margin:0 auto;padding:0 1.25rem}
.article-content-card{background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius-xl);padding:clamp(28px,5vw,56px);box-shadow:var(--shadow-lg)}
.article-cover{width:100%;max-height:420px;object-fit:cover;border-radius:var(--radius-lg);margin-bottom:2rem;border:1px solid var(--glass-border)}
/* ── Markdown 排版（深色主题） ── */
.md-body{font-size:1rem;color:var(--text-primary);line-height:1.9}
.md-body h1,.md-body h2,.md-body h3,.md-body h4{color:var(--text-light);font-weight:700;line-height:1.4;margin:2rem 0 1rem}
.md-body h1{font-size:1.7rem}
.md-body h2{font-size:1.4rem;padding-bottom:0.5rem;border-bottom:1px solid var(--border);position:relative}
.md-body h2::after{content:'';position:absolute;left:0;bottom:-1px;width:64px;height:2px;background:linear-gradient(90deg,var(--color-accent),var(--color-cyan));border-radius:2px}
.md-body h3{font-size:1.15rem}
.md-body h4{font-size:1rem}
.md-body p{margin:0 0 1.15rem}
.md-body a{color:var(--color-cyan);border-bottom:1px dashed rgba(125,211,252,0.4);transition:border-color 0.2s}
.md-body a:hover{border-bottom-style:solid}
.md-body strong{color:var(--text-light);font-weight:700}
.md-body em{color:var(--text-secondary)}
.md-body ul,.md-body ol{margin:0 0 1.15rem;padding-left:1.5rem}
.md-body li{margin-bottom:0.45rem}
.md-body li::marker{color:var(--color-cyan)}
.md-body blockquote{margin:1.5rem 0;padding:1rem 1.4rem;border-left:3px solid var(--color-accent);background:rgba(0,164,255,0.06);border-radius:0 var(--radius-md) var(--radius-md) 0;color:var(--text-secondary)}
.md-body blockquote p:last-child{margin-bottom:0}
.md-body code{font-family:'SF Mono',Menlo,Consolas,monospace;font-size:0.86em;background:rgba(125,211,252,0.1);color:var(--color-cyan);padding:0.15em 0.45em;border-radius:5px}
.md-body pre{margin:1.5rem 0;padding:1.2rem 1.4rem;background:rgba(2,6,23,0.75);border:1px solid var(--border-light);border-radius:var(--radius-md);overflow-x:auto}
.md-body pre code{background:none;padding:0;color:#c9d7e8;font-size:0.85rem;line-height:1.7}
.md-body img{border-radius:var(--radius-md);margin:1.5rem auto;border:1px solid var(--glass-border)}
.md-body table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:0.9rem}
.md-body th{background:rgba(2,6,23,0.6);color:var(--text-light);font-weight:600;text-align:left;padding:0.7rem 1rem;border:1px solid var(--border-light)}
.md-body td{padding:0.65rem 1rem;border:1px solid var(--border);color:var(--text-secondary)}
.md-body hr{border:none;height:1px;background:var(--border);margin:2.5rem 0}
/* ── 标签与底部 ── */
.article-tags{display:flex;gap:0.6rem;flex-wrap:wrap;margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--border)}
.article-tags .tag{font-size:0.75rem;color:var(--text-secondary);padding:0.3rem 0.85rem;border:1px solid var(--glass-border);border-radius:999px;background:var(--glass-bg-light)}
.article-loading,.article-error{text-align:center;padding:5rem 1rem;color:var(--text-dim);font-size:0.95rem}
.article-error .err-ico{font-size:3rem;margin-bottom:1rem}
.article-error a{color:var(--color-cyan)}
.site-footer{background:rgba(2,6,23,0.9);border-top:1px solid var(--border);padding:2.5rem 0 1.5rem;margin-top:var(--section-pad)}
.footer-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:2rem;margin-bottom:2rem}
.footer-brand h4{font-size:1rem;font-weight:700;color:var(--text-light);margin-bottom:0.5rem}
.footer-brand p{font-size:0.82rem;color:var(--text-dim)}
.footer-col h5{font-size:0.82rem;font-weight:600;color:var(--text-secondary);margin-bottom:0.75rem}
.footer-col a{display:block;font-size:0.82rem;color:var(--text-dim);padding:0.2rem 0;transition:color var(--transition)}
.footer-col a:hover{color:var(--color-cyan)}
.footer-bottom{border-top:1px solid var(--border);padding-top:1.25rem;text-align:center;font-size:0.78rem;color:var(--text-dim)}
@media (prefers-reduced-motion:reduce){.page-bg-orb,.logo-mark::after{animation:none!important}}
@media (max-width:768px){.topbar-inner{padding:0 20px;font-size:11px}.topbar-right{display:none}.nav-inner{padding:0 20px;height:60px}.nav-menu{display:none}.nav-mobile-toggle{display:block}.footer-grid{grid-template-columns:1fr}}