:root {
  --surface-0: #ffffff; --surface-1: #ffffff; --surface-2: #f7f7f5;
  --ink-0: #202020; --ink-1: #60605e; --accent: #2383e2; --accent-soft: #edf6ff;
  --line: #e9e9e7; --line-strong: #d9d9d7; --radius: 10px; --content-width: 1120px;
}
html[data-theme="light"] { --surface-0: #ffffff; --surface-1: #ffffff; --surface-2: #f7f7f5; --ink-0: #202020; --ink-1: #60605e; --accent: #2383e2; --accent-soft: #edf6ff; --line: #e9e9e7; --line-strong: #d9d9d7; color-scheme: light; }
html[data-theme="dark"] { --surface-0: #191919; --surface-1: #202020; --surface-2: #2b2b2b; --ink-0: #f1f1ef; --ink-1: #b6b6b3; --accent: #78b9f5; --accent-soft: #1f3349; --line: #383838; --line-strong: #4a4a4a; color-scheme: dark; }
* { box-sizing: border-box; } html { background: var(--surface-0); } body { min-width: 320px; margin: 0; color: var(--ink-0); background: var(--surface-0); font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif; line-height: 1.7; -webkit-font-smoothing: antialiased; } a { color: inherit; text-decoration: none; } button, input { font: inherit; } button { color: inherit; cursor: pointer; }

.site-header { position: sticky; top: 0; z-index: 10; display: grid; grid-template-columns: auto 1fr auto; gap: 2rem; align-items: center; min-height: 68px; padding: 0 max(4vw, 24px); border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--surface-0) 92%, transparent); backdrop-filter: blur(14px); }
.site-brand { font-size: 1rem; font-weight: 760; letter-spacing: -.03em; }.site-header nav { display: flex; justify-content: center; gap: .2rem; }.nav-link, .search-trigger, .theme-trigger, .mobile-trigger { border: 0; border-radius: 6px; padding: .45rem .65rem; color: var(--ink-1); background: transparent; font-size: .88rem; transition: background .18s, color .18s; }.nav-link:hover, .nav-link.is-active, .search-trigger:hover, .theme-trigger:hover, .mobile-trigger:hover { color: var(--ink-0); background: var(--surface-2); }.header-actions { display: flex; gap: .15rem; }.mobile-trigger { display: none; }

.site-main { width: min(var(--content-width), 90vw); margin: 0 auto; }.home-hero { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(290px, .65fr); align-items: center; gap: clamp(2.5rem, 8vw, 8rem); min-height: min(700px, calc(100vh - 68px)); padding: clamp(5rem, 10vw, 9rem) 0; }.hero-content { max-width: 700px; }.eyebrow { margin: 0; color: var(--ink-1); font-size: .78rem; font-weight: 700; letter-spacing: .08em; }.home-hero h1, .explore-hero h1, .library-hero h1 { margin: .65rem 0 1.25rem; color: var(--ink-0); font-size: clamp(3.4rem, 7vw, 6.9rem); font-weight: 760; line-height: .98; letter-spacing: -.085em; }.home-hero h1 span { color: var(--accent); }.explore-hero h1, .library-hero h1 { font-size: clamp(2.5rem, 5vw, 5.1rem); }.home-hero p:not(.eyebrow), .explore-hero > p:last-child, .library-hero > p:last-child { max-width: 610px; margin: 0; color: var(--ink-1); font-size: 1.08rem; }.hero-actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 2rem; }.hero-primary, .hero-secondary { display: inline-flex; align-items: center; border-radius: 7px; padding: .78rem 1rem; font-size: .9rem; font-weight: 700; transition: transform .18s, opacity .18s; }.hero-primary { color: white; background: var(--ink-0); }.hero-secondary { border: 1px solid var(--line-strong); color: var(--ink-0); }.hero-primary:hover, .hero-secondary:hover { transform: translateY(-2px); opacity: .84; }.hero-note { position: relative; display: grid; gap: 1rem; padding: 1.65rem; border: 1px solid var(--line-strong); border-radius: 12px; background: #fff5d6; color: #2e2514; box-shadow: 8px 8px 0 #202020; transform: rotate(2deg); }.hero-note::before { position: absolute; top: -12px; left: 50%; width: 70px; height: 24px; background: rgba(221, 186, 112, .55); content: ""; transform: translateX(-50%) rotate(-3deg); }.hero-note p { margin: 0; font-size: .78rem; font-weight: 700; }.hero-note strong { font-size: 1.4rem; line-height: 1.35; letter-spacing: -.04em; }.hero-note span { font-size: .82rem; opacity: .75; }.hero-note a { width: fit-content; border-bottom: 1px solid #2e2514; font-size: .85rem; font-weight: 700; }.hero-note b { padding-left: .2rem; }

.explore-hero, .library-hero { max-width: 850px; padding: clamp(4.5rem, 10vw, 7rem) 0 3rem; }.exploration-section, .featured-section, .content-section { padding: 2rem 0 6rem; }.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.35rem; }.section-heading h2, .content-section h2 { margin: .25rem 0 0; font-size: clamp(1.65rem, 3vw, 2.45rem); letter-spacing: -.055em; }.explore-grid, .featured-rail, .content-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; }.exploration-entry, .content-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-1); transition: border-color .18s, background .18s, transform .18s; }.exploration-entry { display: flex; min-height: 250px; padding: 1.35rem; flex-direction: column; }.exploration-entry:hover, .content-card:hover { border-color: var(--line-strong); background: var(--surface-2); transform: translateY(-2px); }.exploration-entry h2 { margin: auto 0 .45rem; font-size: 1.45rem; letter-spacing: -.04em; }.exploration-entry p, .content-card p { margin: 0; color: var(--ink-1); }.exploration-entry span { margin-top: 1rem; color: var(--accent); font-size: .87rem; font-weight: 700; }.content-card a { display: block; min-height: 220px; padding: 1.25rem; }.content-card h2 { margin: .4rem 0; font-size: 1.18rem; line-height: 1.35; }.content-card-kind, .content-card-meta { color: var(--ink-1) !important; font-size: .75rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }.content-card-tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: 1rem; }.content-tag { padding: .12rem .45rem; border-radius: 4px; color: var(--ink-1); background: var(--surface-2); font-size: .74rem; }

.recent-learning { padding: 1rem 0 4rem; }.recent-learning[hidden] { display: none; }.recent-learning .section-heading { margin-bottom: .8rem; }.recent-learning button, .library-filters button { border: 1px solid var(--line-strong); border-radius: 6px; padding: .35rem .65rem; color: var(--ink-1); background: transparent; font-size: .8rem; }.recent-learning-card { display: grid; gap: .25rem; max-width: 620px; padding: 1.2rem 1.3rem; border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--radius); background: var(--surface-1); }.recent-learning-card:hover { background: var(--surface-2); }.recent-learning-card span { color: var(--accent); font-size: .75rem; font-weight: 700; }.recent-learning-card strong { font-size: 1.1rem; }.recent-learning-card p { margin: 0; color: var(--ink-1); font-size: .9rem; }.library-filters { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: .8rem; }.library-filters button[aria-pressed="true"] { border-color: var(--ink-0); color: var(--surface-0); background: var(--ink-0); }.library-filter-status { min-height: 1.7rem; margin: 0 0 1rem; color: var(--ink-1); font-size: .84rem; }

.learning-hero { max-width: 850px; padding: clamp(4.5rem, 10vw, 7rem) 0 2.5rem; }.learning-hero h1 { margin: .55rem 0 .8rem; font-size: clamp(2.3rem, 5vw, 4.8rem); line-height: 1.02; letter-spacing: -.07em; }.learning-hero > p:last-of-type { max-width: 660px; margin: 0; color: var(--ink-1); }.learning-progress { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 2rem; padding: .9rem 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-1); }.learning-progress strong, .learning-progress span { display: block; }.learning-progress span { color: var(--ink-1); font-size: .82rem; }.learning-progress button { margin-left: .4rem; border: 1px solid var(--line-strong); border-radius: 6px; padding: .42rem .7rem; color: var(--ink-0); background: var(--surface-0); font-size: .8rem; }.learning-progress button:first-child { color: white; background: var(--ink-0); }.learning-pagination { display: flex; justify-content: space-between; gap: 1rem; padding: 0 0 6rem; }.learning-pagination .nav-btn { max-width: 48%; padding: .75rem 0; color: var(--accent); font-size: .9rem; }.learning-pagination .nav-next { margin-left: auto; text-align: right; }

.article-shell { max-width: 820px; margin: 0 auto; padding: 4rem 0 6rem; }.article-shell img { max-width: 100%; height: auto; border-radius: 6px; }.article-shell pre { overflow-x: auto; padding: 1rem; border-radius: 6px; color: var(--ink-0); background: var(--surface-2); }.article-shell a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }.article-shell table { width: 100%; border-collapse: collapse; border: 1px solid var(--line); }.article-shell td, .article-shell th { padding: .7rem; border: 1px solid var(--line); text-align: left; }
html[data-theme="dark"] .hero-primary { color: #202020; background: #f1f1ef; }
.hero-doodle-row { display: flex; align-items: center; height: 42px; margin-bottom: .2rem; }.hero-doodle-row img { width: 45px; height: 45px; object-fit: contain; }.hero-doodle-row img + img { margin-left: -10px; }.card-doodle { width: 48px; height: 48px; margin-bottom: .5rem; object-fit: contain; }
.site-footer { width: min(var(--content-width), 90vw); margin: 0 auto; padding: 2.5rem 0 3rem; border-top: 1px solid var(--line); color: var(--ink-1); font-size: .84rem; text-align:center; }.site-footer p { margin: .35rem 0; }.site-footer a { color: var(--ink-0); }.site-footer .site-records { display:flex; flex-wrap:wrap; gap:.55rem; align-items:center; justify-content:center; }.site-footer .site-records a { text-underline-offset:3px; }.feedback { max-width: 620px; margin: 1.4rem 0; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-1); }.feedback p { color: var(--ink-0); font-weight: 700; }.feedback button { margin-right: .45rem; border: 1px solid var(--line-strong); border-radius: 6px; padding: .35rem .7rem; background: transparent; }.feedback button:hover { color: white; background: var(--ink-0); }.feedback label { display: block; margin-top: .8rem; color: var(--ink-1); font-size: .82rem; }.feedback input { width: min(100%, 360px); margin-left: .4rem; border: 1px solid var(--line-strong); border-radius: 5px; padding: .35rem .5rem; color: var(--ink-0); background: var(--surface-0); }.feedback [data-feedback-status] { display: block; margin-top: .55rem; color: var(--accent); font-size: .84rem; }
.search-dialog { width: min(680px, calc(100vw - 2rem)); border: 1px solid var(--line-strong); border-radius: 10px; padding: 1.2rem; color: var(--ink-0); background: var(--surface-1); }.search-dialog::backdrop { background: rgba(0, 0, 0, .2); }.search-dialog-header { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; font-weight: 700; }.search-dialog-header button { border: 0; background: transparent; color: var(--ink-1); }.search-dialog input { width: 100%; border: 1px solid var(--line-strong); border-radius: 6px; padding: .85rem 1rem; color: var(--ink-0); background: var(--surface-0); outline: none; }.search-dialog input:focus { border-color: var(--accent); }.search-results { display: grid; gap: .5rem; margin-top: .8rem; }.search-result { display: block; border-radius: 6px; padding: .8rem; }.search-result:hover { background: var(--surface-2); }.search-result span { display: block; color: var(--ink-1); font-size: .85rem; }.search-status { color: var(--ink-1); padding: .8rem; }
.admin-shell { width: min(920px, 90vw); margin: 0 auto; padding: 12vh 0 6rem; }.admin-login { max-width: 460px; padding: 1.5rem; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--surface-1); }.admin-login h1, .admin-dashboard h1 { margin: .35rem 0; letter-spacing: -.04em; }.admin-login form { display: grid; gap: .8rem; margin-top: 1.2rem; }.admin-login input { width: 100%; margin-top: .3rem; border: 1px solid var(--line-strong); border-radius: 5px; padding: .65rem; color: var(--ink-0); background: var(--surface-0); }.admin-login button, .admin-dashboard button { width: fit-content; border: 0; border-radius: 6px; padding: .5rem .85rem; color: white; background: var(--ink-0); }.admin-dashboard header { display: flex; align-items: end; justify-content: space-between; gap: 1rem; }.admin-dashboard section { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--line); }.admin-dashboard li { margin: .45rem 0; color: var(--ink-1); }.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; margin-top: 2rem; }.metric-card { padding: 1rem; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-1); }.metric-card p { margin: 0; color: var(--ink-1); }.metric-card strong { display: block; margin-top: .35rem; font-size: 1.7rem; }
@media (max-width: 900px) { .site-header { grid-template-columns: 1fr auto auto; gap: .35rem; }.mobile-trigger { display: block; }.site-header nav { display: none; position: absolute; top: 68px; right: 4vw; left: 4vw; padding: .6rem; flex-direction: column; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-1); }.site-header nav[data-open="true"] { display: flex; }.home-hero { grid-template-columns: 1fr; min-height: auto; }.hero-note { width: min(340px, 100%); }.explore-grid, .featured-rail, .content-grid { grid-template-columns: repeat(2, 1fr); }.metric-grid { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .site-header { padding: 0 5vw; }.theme-trigger { display: none; }.home-hero { gap: 3.5rem; padding: 5rem 0; }.home-hero h1 { font-size: clamp(3.3rem, 16vw, 5rem); }.explore-hero, .library-hero { padding-top: 4.5rem; }.explore-grid, .featured-rail, .content-grid { grid-template-columns: 1fr; }.exploration-entry { min-height: 210px; }.feedback input { display: block; margin: .35rem 0 0; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; } }