:root {
    --snav-bg: #15171b;
    --snav-surface: #20242a;
    --snav-surface-raised: #292e35;
    --snav-text: #f5f7f8;
    --snav-muted: #aeb7c0;
    --snav-line: rgba(255, 255, 255, .14);
    --snav-accent: #45bfab;
    --snav-accent-strong: #2fa18e;
    --snav-shadow: 0 18px 48px rgba(0, 0, 0, .24);
    --snav-radius: 8px;
    --snav-font: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

:root[data-theme="light"] {
    --snav-bg: #f3f5f4;
    --snav-surface: #ffffff;
    --snav-surface-raised: #eef2f0;
    --snav-text: #1c2523;
    --snav-muted: #65706c;
    --snav-line: rgba(24, 41, 35, .13);
    --snav-accent: #178b77;
    --snav-accent-strong: #0d6c5b;
    --snav-shadow: 0 18px 48px rgba(25, 50, 42, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.snav-body { margin: 0; min-width: 320px; background: var(--snav-bg); color: var(--snav-text); font-family: var(--snav-font); font-size: 15px; line-height: 1.55; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }

.snav-topbar { position: fixed; inset: 0 0 auto; z-index: 30; height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 32px; color: #fff; background: rgba(12, 15, 17, .50); border-bottom: 1px solid rgba(255, 255, 255, .10); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); transition: background .2s ease, transform .2s ease; }
.snav-topbar.is-solid { background: rgba(19, 23, 27, .92); }
.snav-brand, .snav-controls, .snav-main-nav { display: flex; align-items: center; }
.snav-brand { gap: 10px; min-width: 170px; font-size: 16px; font-weight: 700; }
.snav-brand img, .snav-brand-mark { width: 32px; height: 32px; border-radius: 8px; object-fit: contain; }
.snav-brand-mark { display: grid; place-items: center; background: var(--snav-accent); color: #062b25; font-size: 17px; }
.snav-main-nav { gap: 28px; font-size: 14px; color: rgba(255, 255, 255, .76); }
.snav-main-nav a:hover, .snav-main-nav a:focus { color: #fff; }
.snav-controls { justify-content: flex-end; gap: 10px; min-width: 170px; }
.snav-icon-button, .snav-login { border: 0; color: #fff; background: transparent; }
.snav-icon-button { display: grid; place-items: center; width: 34px; height: 34px; padding: 0; border-radius: 7px; font-size: 18px; }
.snav-icon-button:hover, .snav-login:hover { background: rgba(255, 255, 255, .12); }
.snav-login { padding: 6px 10px; border-radius: 7px; font-size: 13px; }
.snav-menu-toggle { display: none; }
.snav-menu-toggle span { display: block; width: 16px; height: 1px; margin: 2px; background: #fff; }

.snav-stage { position: relative; display: grid; min-height: 650px; overflow: hidden; place-items: center; padding: 106px 24px 50px; color: #fff; background: #1a2020; }
.snav-stage-cover, .snav-stage-shade { position: absolute; inset: 0; }
.snav-stage-cover { background-image: var(--snav-cover); background-position: center; background-size: cover; transform: scale(1.02); animation: snav-cover-in 900ms ease-out both; }
.snav-stage-shade { background: rgba(5, 12, 13, .52); }
.snav-stage-content { position: relative; z-index: 1; width: min(760px, 100%); text-align: center; text-shadow: 0 2px 18px rgba(0, 0, 0, .36); }
.snav-eyebrow { margin: 0 0 12px; color: rgba(255, 255, 255, .72); font-size: 12px; letter-spacing: 2px; }
.snav-stage h1 { margin: 0; font-size: 44px; line-height: 1.2; letter-spacing: 0; }
.snav-subtitle { max-width: 580px; margin: 14px auto 22px; color: rgba(255, 255, 255, .86); }
.snav-clock { display: flex; flex-direction: column; align-items: center; margin-bottom: 24px; }
.snav-clock strong { font-size: 48px; font-weight: 400; line-height: 1; letter-spacing: 2px; }
.snav-clock span { margin-top: 8px; font-size: 13px; color: rgba(255, 255, 255, .78); }
.snav-search { display: grid; grid-template-columns: auto 1fr auto; align-items: center; width: 100%; min-height: 52px; overflow: hidden; border: 1px solid rgba(255, 255, 255, .24); border-radius: var(--snav-radius); background: rgba(255, 255, 255, .92); box-shadow: 0 12px 36px rgba(0, 0, 0, .18); text-shadow: none; }
.snav-search select { max-width: 88px; height: 52px; padding: 0 8px 0 14px; color: #46504d; border: 0; border-right: 1px solid #dce3df; background: transparent; outline: 0; font-size: 13px; }
.snav-search input { min-width: 0; height: 52px; padding: 0 16px; color: #18211f; border: 0; background: transparent; outline: 0; }
.snav-search input::placeholder { color: #75827d; }
.snav-search button { height: 36px; margin-right: 8px; padding: 0 18px; color: #fff; border: 0; border-radius: 6px; background: #1c2825; font-size: 13px; }
.snav-search button:hover { background: var(--snav-accent-strong); }
.snav-quick-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 24px auto 0; }
.snav-quick-links a { display: flex; align-items: center; gap: 7px; padding: 5px 9px 5px 5px; color: #fff; border: 1px solid rgba(255, 255, 255, .16); border-radius: 7px; background: rgba(8, 14, 14, .28); font-size: 13px; transition: transform .18s ease, background .18s ease; }
.snav-quick-links a:hover { background: rgba(8, 14, 14, .55); transform: translateY(-2px); }
.snav-quick-links span { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 5px; background: rgba(255, 255, 255, .18); }

.snav-directory, .snav-content-page { width: min(1220px, calc(100% - 48px)); margin: 0 auto; }
.snav-directory { padding: 64px 0 80px; }
.snav-content-page { min-height: calc(100vh - 66px); padding: 106px 0 72px; }
.snav-section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.snav-section-heading p { margin: 0 0 3px; color: var(--snav-accent); font-size: 12px; font-weight: 700; letter-spacing: 1.5px; }
.snav-section-heading h1, .snav-section-heading h2 { margin: 0; color: var(--snav-text); font-size: 28px; line-height: 1.2; }
.snav-section-heading > span, .snav-section-heading > a { color: var(--snav-muted); font-size: 13px; }
.snav-section-heading > a:hover { color: var(--snav-accent); }
.snav-category-bar { display: flex; gap: 8px; overflow-x: auto; margin-bottom: 30px; padding-bottom: 4px; scrollbar-width: thin; }
.snav-category-bar a { flex: 0 0 auto; padding: 6px 11px; color: var(--snav-muted); border: 1px solid var(--snav-line); border-radius: 6px; background: var(--snav-surface); font-size: 13px; transition: background .16s ease, color .16s ease; }
.snav-category-bar a:hover { color: #fff; border-color: var(--snav-accent); background: var(--snav-accent); }
.snav-site-groups { display: grid; gap: 38px; }
.snav-site-group { scroll-margin-top: 86px; }
.snav-site-group > header { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.snav-site-group h3 { margin: 0; font-size: 18px; }
.snav-site-group header span { color: var(--snav-muted); font-size: 12px; }
.snav-site-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.snav-site-card { display: flex; align-items: center; gap: 12px; min-width: 0; min-height: 84px; padding: 14px; border: 1px solid var(--snav-line); border-radius: var(--snav-radius); background: var(--snav-surface); box-shadow: 0 1px 0 rgba(255, 255, 255, .02); transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease; }
.snav-site-card:hover { border-color: rgba(69, 191, 171, .72); box-shadow: var(--snav-shadow); transform: translateY(-3px); }
.snav-site-icon { display: grid; flex: 0 0 auto; place-items: center; width: 38px; height: 38px; overflow: hidden; border-radius: 8px; background: var(--snav-surface-raised); color: var(--snav-accent); }
.snav-site-icon img { width: 100%; height: 100%; object-fit: contain; }
.snav-site-icon b { font-size: 17px; font-weight: 600; }
.snav-site-copy { display: grid; min-width: 0; gap: 2px; }
.snav-site-copy strong, .snav-site-copy small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.snav-site-copy strong { font-size: 14px; }
.snav-site-copy small { color: var(--snav-muted); font-size: 12px; }
.snav-site-arrow { margin-left: auto; color: var(--snav-muted); font-size: 16px; }
.snav-site-card:hover .snav-site-arrow { color: var(--snav-accent); }
.snav-empty { padding: 40px; color: var(--snav-muted); border: 1px dashed var(--snav-line); border-radius: var(--snav-radius); text-align: center; }
.snav-empty strong { display: block; margin-bottom: 5px; color: var(--snav-text); }
.snav-empty p { margin: 0; }

.snav-archive { max-width: 900px; margin: 0 auto; }
.snav-post-list { display: grid; gap: 10px; }
.snav-post-card { display: grid; grid-template-columns: 58px 1fr auto; gap: 18px; align-items: center; padding: 18px; border: 1px solid var(--snav-line); border-radius: var(--snav-radius); background: var(--snav-surface); }
.snav-post-date { color: var(--snav-accent); font-size: 13px; font-weight: 700; }
.snav-post-card h3 { margin: 0; font-size: 16px; }
.snav-post-card h3 a:hover { color: var(--snav-accent); }
.snav-post-card p { display: -webkit-box; margin: 5px 0 0; overflow: hidden; color: var(--snav-muted); font-size: 13px; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.snav-text-link, .snav-primary-link { color: var(--snav-accent); font-size: 13px; font-weight: 700; }
.snav-pagination { margin-top: 28px; color: var(--snav-muted); text-align: center; }
.snav-pagination a, .snav-pagination span { display: inline-block; margin: 0 3px; padding: 5px 9px; border: 1px solid var(--snav-line); border-radius: 5px; }

.snav-article { max-width: 820px; margin: 0 auto; padding: 38px; border: 1px solid var(--snav-line); border-radius: var(--snav-radius); background: var(--snav-surface); }
.snav-breadcrumb { display: inline-block; margin-bottom: 24px; color: var(--snav-accent); font-size: 13px; }
.snav-article header p { margin: 0 0 8px; color: var(--snav-muted); font-size: 13px; }
.snav-article h1 { margin: 0; font-size: 32px; line-height: 1.3; }
.snav-article-cover { width: 100%; max-height: 420px; margin-top: 28px; border-radius: 7px; object-fit: cover; }
.snav-markdown { margin-top: 30px; overflow-wrap: break-word; }
.snav-markdown img { max-width: 100%; height: auto; }
.snav-markdown pre { overflow: auto; padding: 16px; border-radius: 6px; background: var(--snav-bg); }
.snav-markdown code { padding: 2px 5px; border-radius: 4px; background: var(--snav-surface-raised); }
.snav-markdown pre code { padding: 0; background: transparent; }
.snav-markdown a { color: var(--snav-accent); text-decoration: underline; }
.snav-article-meta { margin-top: 34px; padding-top: 16px; border-top: 1px solid var(--snav-line); color: var(--snav-muted); }
.snav-password-box { max-width: 560px; margin: 80px auto; padding: 36px; border: 1px solid var(--snav-line); border-radius: var(--snav-radius); background: var(--snav-surface); text-align: center; }
.snav-password-box h1 { margin-top: 0; }
.snav-error-page { display: grid; min-height: 100vh; place-content: center; padding: 24px; color: #fff; background: #17201f; text-align: center; }
.snav-error-page p { margin: 0; color: var(--snav-accent); font-size: 90px; font-weight: 700; line-height: 1; }
.snav-error-page h1 { font-size: 26px; }
.snav-error-page a { margin-top: 8px; color: var(--snav-accent); }
.snav-footer { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; padding: 25px; color: var(--snav-muted); border-top: 1px solid var(--snav-line); font-size: 12px; text-align: center; }
.snav-footer p { margin: 0; }
.snav-footer a:hover { color: var(--snav-accent); }
.snav-backtop { position: fixed; right: 22px; bottom: 22px; z-index: 20; width: 38px; height: 38px; color: #fff; border: 1px solid rgba(255, 255, 255, .15); border-radius: 6px; background: rgba(25, 30, 34, .84); opacity: 0; pointer-events: none; transition: opacity .18s ease, transform .18s ease; }
.snav-backtop.is-visible { opacity: 1; pointer-events: auto; }
.snav-backtop:hover { transform: translateY(-3px); background: var(--snav-accent); }

@keyframes snav-cover-in { from { opacity: .55; transform: scale(1.08); } to { opacity: 1; transform: scale(1.02); } }
@media (max-width: 860px) { .snav-topbar { height: 58px; padding: 0 18px; } .snav-brand { min-width: 0; } .snav-main-nav { position: absolute; top: 58px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 18px 14px; background: rgba(16, 20, 23, .97); } .snav-main-nav.is-open { display: flex; } .snav-main-nav a { padding: 10px 0; } .snav-menu-toggle { display: grid; } .snav-login { display: none; } .snav-controls { min-width: 0; } .snav-stage { min-height: 590px; padding-top: 92px; } .snav-stage h1 { font-size: 34px; } .snav-clock strong { font-size: 42px; } .snav-site-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .snav-directory, .snav-content-page { width: min(100% - 32px, 1220px); } .snav-article { padding: 26px 20px; } }
@media (max-width: 560px) { .snav-brand > span:last-child { max-width: 155px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; } .snav-stage { min-height: 560px; padding: 86px 16px 32px; } .snav-stage h1 { font-size: 30px; } .snav-subtitle { font-size: 14px; } .snav-search { grid-template-columns: 74px 1fr 54px; } .snav-search select { max-width: none; padding: 0 6px; } .snav-search input { padding: 0 9px; font-size: 14px; } .snav-search button { margin-right: 6px; padding: 0 10px; } .snav-quick-links { gap: 7px; } .snav-quick-links a { font-size: 12px; } .snav-directory { padding: 42px 0 55px; } .snav-section-heading h1, .snav-section-heading h2 { font-size: 24px; } .snav-site-grid { grid-template-columns: 1fr; } .snav-site-card { min-height: 72px; } .snav-post-card { grid-template-columns: 1fr auto; gap: 9px; } .snav-post-date { grid-column: 1 / -1; } .snav-article h1 { font-size: 27px; } }