:root { --font-display: var(--font-en), var(--font-cn); --font-body: var(--font-cn), var(--font-en); }
body { overflow-x: hidden; animation: page-in .45s ease both; }
.site-header { height: 74px; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(12px); position: sticky; top: 0; z-index: 10; }
.header-inner { height: 100%; max-width: var(--max-width); margin: auto; padding: 0 var(--gutter); display: flex; align-items: center; gap: 42px; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 70px; }
.brand-logo { width: 36px; height: 36px; object-fit: contain; display: block; flex: 0 0 auto; content: url('HG_logo_dark_v001.svg'); }
.brand-name { font-family: var(--font-display); font-weight: 600; letter-spacing: .06em; font-size: 17px; }
.brand-name small { display: block; font-family: var(--font-body); font-size: 8px; letter-spacing: .14em; color: var(--muted); margin-top: 2px; }
.primary-nav { display: flex; align-items: center; }
.primary-nav a { position: relative; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { color: var(--ink); }
.primary-nav a::after { content: ''; position: absolute; left: 0; width: 0; background: var(--brand-cyan); transition: width .22s ease; }
.primary-nav a:hover::after, .primary-nav a[aria-current="page"]::after { width: 100%; }
.header-tools { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.icon-button { width: 36px; height: 36px; border: 1px solid var(--ink); display: grid; place-items: center; font-size: 15px; }
.icon-button:hover { background: var(--cyan); transform: translateY(-2px); }
.language-toggle { border: 1px solid var(--ink); min-height: 36px; padding: 0 10px; font-size: 10px; letter-spacing: .08em; }
.language-toggle:hover, .language-toggle.is-zh { background: var(--cyan); color: var(--ink); transform: translateY(-2px); }
.lang-divider { color: var(--muted); padding: 0 4px; }

.page-shell { max-width: var(--max-width); margin: auto; padding: 0 var(--gutter) var(--space-7); }
.feed-intro { padding: clamp(40px, 5vw, 72px) 0 clamp(42px, 5vw, 70px); display: grid; grid-template-columns: 1fr 2fr; gap: 24px; border-bottom: 1px solid var(--ink); }
.intro-date { margin-top: 18px; }
.eyebrow, .card-kicker, .meta, .filter-label { font-size: var(--caption-size); line-height: var(--caption-leading); letter-spacing: .08em; text-transform: uppercase; }
.eyebrow { color: var(--blue); font-weight: 500; }
.intro-title { font-family: var(--font-display); font-size: clamp(48px, 7vw, 88px); line-height: .94; letter-spacing: -.02em; text-transform: uppercase; max-width: 850px; margin: 0; }
.intro-note { max-width: 320px; align-self: end; justify-self: end; font-size: var(--body-size); line-height: var(--body-leading); color: #555; }
.feed-status { display: flex; justify-content: flex-start; }
.feed-meta-line { display: flex; align-items: baseline; justify-content: flex-start; gap: 12px; width: 100%; }
.pixel-clock { display: inline-flex; align-items: center; gap: 6px; color: var(--foreground); }
.clock-digit { position: relative; display: inline-block; width: 34px; height: 58px; }
.clock-digit i { position: absolute; display: block; background: currentColor; opacity: .16; transition: opacity .15s ease; }
.clock-digit .segment-a, .clock-digit .segment-g, .clock-digit .segment-d { left: 6px; width: 22px; height: 7px; clip-path: polygon(18% 0, 82% 0, 100% 50%, 82% 100%, 18% 100%, 0 50%); }
.clock-digit .segment-a { top: 0; }
.clock-digit .segment-g { top: 25px; }
.clock-digit .segment-d { bottom: 0; }
.clock-digit .segment-b, .clock-digit .segment-c, .clock-digit .segment-e, .clock-digit .segment-f { width: 7px; height: 22px; clip-path: polygon(50% 0, 100% 18%, 100% 82%, 50% 100%, 0 82%, 0 18%); }
.clock-digit .segment-f { top: 5px; left: 0; }
.clock-digit .segment-b { top: 5px; right: 0; }
.clock-digit .segment-e { bottom: 5px; left: 0; }
.clock-digit .segment-c { right: 0; bottom: 5px; }
.clock-digit[data-digit="0"] .segment-a, .clock-digit[data-digit="0"] .segment-b, .clock-digit[data-digit="0"] .segment-c, .clock-digit[data-digit="0"] .segment-d, .clock-digit[data-digit="0"] .segment-e, .clock-digit[data-digit="0"] .segment-f,
.clock-digit[data-digit="1"] .segment-b, .clock-digit[data-digit="1"] .segment-c,
.clock-digit[data-digit="2"] .segment-a, .clock-digit[data-digit="2"] .segment-b, .clock-digit[data-digit="2"] .segment-d, .clock-digit[data-digit="2"] .segment-e, .clock-digit[data-digit="2"] .segment-g,
.clock-digit[data-digit="3"] .segment-a, .clock-digit[data-digit="3"] .segment-b, .clock-digit[data-digit="3"] .segment-c, .clock-digit[data-digit="3"] .segment-d, .clock-digit[data-digit="3"] .segment-g,
.clock-digit[data-digit="4"] .segment-b, .clock-digit[data-digit="4"] .segment-c, .clock-digit[data-digit="4"] .segment-f, .clock-digit[data-digit="4"] .segment-g,
.clock-digit[data-digit="5"] .segment-a, .clock-digit[data-digit="5"] .segment-c, .clock-digit[data-digit="5"] .segment-d, .clock-digit[data-digit="5"] .segment-f, .clock-digit[data-digit="5"] .segment-g,
.clock-digit[data-digit="6"] .segment-a, .clock-digit[data-digit="6"] .segment-c, .clock-digit[data-digit="6"] .segment-d, .clock-digit[data-digit="6"] .segment-e, .clock-digit[data-digit="6"] .segment-f, .clock-digit[data-digit="6"] .segment-g,
.clock-digit[data-digit="7"] .segment-a, .clock-digit[data-digit="7"] .segment-b, .clock-digit[data-digit="7"] .segment-c,
.clock-digit[data-digit="8"] i,
.clock-digit[data-digit="9"] .segment-a, .clock-digit[data-digit="9"] .segment-b, .clock-digit[data-digit="9"] .segment-c, .clock-digit[data-digit="9"] .segment-d, .clock-digit[data-digit="9"] .segment-f, .clock-digit[data-digit="9"] .segment-g { opacity: 1; }
.clock-colon { position: relative; display: inline-block; width: 8px; height: 58px; animation: clock-blink 1s steps(1, end) infinite; }
.clock-colon::before, .clock-colon::after { content: ''; position: absolute; left: 1px; width: 6px; height: 6px; background: currentColor; }
.clock-colon::before { top: 18px; }
.clock-colon::after { bottom: 18px; }
@keyframes clock-blink { 50% { opacity: 0; } }
.intro-copy { display: flex; flex-direction: column; align-items: flex-end; text-align: right; }
.intro-title { width: 100%; text-align: right; }
.intro-note { text-align: right; }
.filter-bar { display: flex; align-items: center; gap: 22px; min-height: 68px; border-bottom: 1px solid var(--line); overflow-x: auto; }
.filter-label { color: var(--muted); white-space: nowrap; }
.filters { display: flex; gap: 6px; }
.filter { padding: 7px 10px 6px; white-space: nowrap; font-size: 11px; letter-spacing: .06em; transition: background .18s ease, color .18s ease; }
.filter:hover, .filter.is-active { background: var(--ink); color: var(--white); }
.feed-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 26px 18px; padding-top: 30px; align-items: stretch; }
.feed-grid.is-filtered { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.feed-grid.is-filtered .content-card,
.feed-grid.is-filtered .content-card.featured,
.feed-grid.is-filtered .content-card.tall { grid-column: span 1; }
.content-card { grid-column: span 4; min-width: 0; }
.content-card.featured { grid-column: span 7; }
.content-card.tall { grid-column: span 5; }
.content-card.is-hidden { display: none; }
.content-card { transition: transform .3s ease; }
.content-card:hover { transform: translateY(-4px); }
.content-card > a { height: 100%; display: flex; flex-direction: column; }
.card-media, .featured .card-media, .tall .card-media { position: relative; aspect-ratio: 1.25; overflow: hidden; background: #ddd; }
.card-media img { width: 100%; height: 100%; display: block; object-fit: cover; filter: saturate(.9); transition: transform .6s cubic-bezier(.2,.7,.2,1), filter .5s ease; }
.content-card:hover .card-media img { transform: scale(1.035); filter: saturate(1.1); }
.media-index { position: absolute; left: 12px; top: 10px; color: var(--white); font-size: 10px; letter-spacing: .08em; mix-blend-mode: difference; }
.media-type { position: absolute; right: 10px; top: 10px; padding: 5px 7px; background: var(--cyan); font-size: 9px; letter-spacing: .1em; }
.card-copy { border-bottom: 1px solid var(--ink); padding: 14px 0 17px; display: flex; flex: 1; flex-direction: column; }
.card-kicker { color: var(--blue); margin-bottom: 9px; }
.card-title { font-family: var(--font-display); font-size: clamp(28px, 3vw, 40px); line-height: 1.16; letter-spacing: .01em; text-transform: uppercase; margin: 0 0 12px; max-width: 590px; white-space: nowrap; overflow: visible; }
.featured .card-title { font-size: clamp(30px, 3.5vw, 52px); }
.card-description { margin: 0; color: #5c5c5c; font-size: var(--body-size); line-height: var(--body-leading); max-width: 540px; }
.card-meta { display: flex; justify-content: space-between; gap: 10px; margin-top: auto; padding-top: 17px; color: var(--muted); }
.card-meta span:last-child { color: var(--ink); }

.site-footer { border-top: 1px solid var(--ink); margin-top: 80px; padding: 38px 0 50px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 10px; color: var(--muted); }
.content-page > .site-footer { width: calc(100% - (var(--gutter) * 2)); max-width: calc(var(--max-width) - (var(--gutter) * 2)); margin-left: auto; margin-right: auto; padding-left: 0; padding-right: 0; }
.footer-mark { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; width: 220px; height: 44px; color: var(--ink); font-family: var(--font-display); font-size: 0; line-height: 1.1; letter-spacing: .06em; }
.footer-mark::before { content: none; display: none; }
.footer-mark::after { content: ''; width: 220px; height: 44px; background: url('copyright.svg') left center / 180px auto no-repeat; }
.social-links { display: flex; gap: 10px; align-items: center; }
.social-links { gap: 8px; }
.social-links a { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid var(--ink); border-radius: 50%; }
.social-links a:hover { background: var(--cyan); color: var(--ink); }
.social-links svg { width: 15px; height: 15px; fill: currentColor; }
.content-page > .site-footer .social-links { display: flex; visibility: visible; opacity: 1; }
.content-page > .site-footer .social-links a { display: grid; visibility: visible; opacity: 1; color: var(--ink); font-size: 12px; }
.content-page > .site-footer { align-items: center; }
.content-page > .site-footer .footer-mark { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; width: 220px; height: 44px; color: var(--ink); line-height: 1.1; }
.content-page > .site-footer .footer-mark::before { content: none; display: none; }
.content-page > .site-footer .footer-mark::after { content: ''; width: 220px; height: 44px; background: url('copyright.svg') left center / 180px auto no-repeat; }
[data-theme="dark"] .brand-logo, .theme-dark .brand-logo { content: url('HG_logo_white_v001.svg'); }
[data-theme="dark"] .footer-mark::after, .theme-dark .footer-mark::after { filter: invert(1); }

@keyframes page-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } }

@media (max-width: 800px) {
  .site-header { height: 64px; }
  .header-inner { gap: 16px; }
  .brand { min-width: 0; }
  .brand-name { font-size: 14px; }
  .primary-nav { display: none; }
  .feed-intro { padding-top: 48px; display: block; }
  .feed-status { margin-bottom: 28px; }
  .intro-title { margin: 20px 0 30px; font-size: clamp(50px, 16vw, 98px); }
  .intro-note { margin-left: auto; }
  .feed-grid { grid-template-columns: 1fr; gap: 24px 12px; }
  .feed-grid.is-filtered { grid-template-columns: 1fr; }
  .content-card, .content-card.featured, .content-card.tall { grid-column: span 1; grid-row: auto; }
  .featured .card-media, .tall .card-media, .card-media { aspect-ratio: 1.05; }
  .featured .card-title { font-size: 34px; }
  .card-title { font-size: 22px; }
  .site-footer { margin-top: 55px; padding: 30px 0 40px; flex-wrap: wrap; }
  .content-page > .site-footer { margin-top: 55px; }
}


/* Design system refinement: quiet contrast, 4px rhythm and Chinese text comfort. */
body { background: var(--background); color: var(--foreground); }
.site-header { border-bottom-color: var(--border); background: color-mix(in srgb, var(--background) 88%, transparent); }
.header-inner { gap: var(--space-8); }
.primary-nav { gap: var(--space-6); font-family: "DIN Alternate", "Arial Narrow", var(--font-en), sans-serif; font-size: 14px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.primary-nav a { padding: var(--space-7) 0; }
.primary-nav a::after { bottom: var(--space-5); height: 1px; }
.header-tools { gap: var(--space-2); align-items: center; height: 100%; }
.icon-button, .language-toggle { box-sizing: border-box; height: 36px; min-height: 36px; padding-top: 0; padding-bottom: 0; line-height: 1; }
.language-toggle { display: inline-flex; align-items: center; justify-content: center; min-width: 76px; }
.icon-button[aria-label="Open menu"] { font-size: 15px; }
.icon-button[aria-label="Open menu"]::before { content: none; display: none; }
.language-toggle.is-zh { background: transparent; color: var(--foreground); border-color: var(--foreground); transform: none; }
.icon-button, .language-toggle { border-color: var(--foreground); border-radius: var(--radius); transition: background-color .2s ease, color .2s ease, transform .2s ease, border-color .2s ease; }
.icon-button:hover, .language-toggle:hover { background: var(--secondary); color: var(--secondary-foreground); border-color: var(--secondary); }
.feed-intro { gap: var(--space-6); border-bottom-color: var(--foreground); }
.intro-title, .content-title { font-family: var(--font-hero); font-weight: 600; letter-spacing: 0; }
.intro-title { line-height: 1; }
.intro-note, .card-description { color: var(--muted-foreground); }
.filter-bar { gap: var(--space-6); border-bottom-color: var(--border); }
.filters { gap: var(--space-1); }
.filter { padding: var(--space-2) var(--space-3); border-radius: var(--radius); transition: background-color .2s ease, color .2s ease, transform .2s ease; }
.filter:hover { transform: translateY(-1px); }
.filter:hover, .filter.is-active { background: var(--primary); color: var(--primary-foreground); }
.feed-grid { gap: var(--space-7) var(--space-4); padding-top: var(--space-6); }
.content-card { transition: transform .28s ease; }
.content-card:hover { transform: translateY(-3px); }
.card-media { background: var(--surface); }
.card-media img { transition: transform .5s ease, filter .35s ease; }
.card-copy { border-bottom-color: var(--foreground); padding: var(--space-4) 0 var(--space-5); }
.card-kicker { margin-bottom: var(--space-2); color: var(--accent-foreground, var(--blue)); letter-spacing: .06em; }
.card-title { font-family: var(--font-display); font-weight: 600; letter-spacing: .01em; font-size: clamp(24px, 2.5vw, 34px); }
.featured .card-title { font-size: clamp(28px, 2.8vw, 38px); }
.media-type { border-radius: var(--radius); background: var(--secondary); color: var(--secondary-foreground); }
.site-footer { border-top-color: var(--foreground); color: var(--muted-foreground); }
.social-links a { border-color: var(--foreground); transition: background-color .2s ease, color .2s ease, transform .2s ease; }
.social-links a:hover { transform: translateY(-2px); background: var(--secondary); color: var(--secondary-foreground); }
@media (max-width: 800px) {
  .header-inner { gap: var(--space-4); }
  .intro-title { line-height: 1.05; }
  .card-title, .content-title { white-space: normal; overflow-wrap: anywhere; text-overflow: clip; }
  .feed-grid { gap: var(--space-6) var(--space-3); }
}

/* Keep the clock close to the date scale while preserving the seven-segment character. */
.pixel-clock { gap: 3px; font-family: var(--font-body); font-size: var(--caption-size); font-weight: 500; line-height: var(--caption-leading); letter-spacing: .08em; transform: none; margin: 0; }
.feed-status .intro-date, .feed-status .pixel-clock { white-space: nowrap; }
.clock-digit { width: 20px; height: 34px; }
.clock-digit .segment-a, .clock-digit .segment-g, .clock-digit .segment-d { left: 4px; width: 12px; height: 4px; }
.clock-digit .segment-g { top: 15px; }
.clock-digit .segment-b, .clock-digit .segment-c, .clock-digit .segment-e, .clock-digit .segment-f { width: 4px; height: 12px; }
.clock-digit .segment-f, .clock-digit .segment-b { top: 3px; }
.clock-digit .segment-e, .clock-digit .segment-c { bottom: 3px; }
.clock-colon { width: 5px; height: 34px; }
.clock-colon::before, .clock-colon::after { left: 1px; width: 4px; height: 4px; }
.clock-colon::before { top: 10px; }
.clock-colon::after { bottom: 10px; }
.pixel-clock { transform: none; margin-right: 0; }

/* Shared search surface and the compact mobile navigation. */
.site-search-panel { position: fixed; inset: 0; z-index: 40; display: grid; place-items: start center; padding: clamp(80px, 14vh, 148px) var(--gutter) var(--gutter); background: color-mix(in srgb, var(--background) 92%, transparent); }
.site-search-panel[hidden] { display: none; }
.site-search-dialog { width: min(720px, 100%); padding: var(--space-6); border: 1px solid var(--border); background: var(--background); box-shadow: 0 18px 48px color-mix(in srgb, var(--foreground) 12%, transparent); }
.site-search-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-5); }
.site-search-close { flex: none; width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 50%; background: transparent; color: var(--foreground); font: inherit; font-size: 22px; line-height: 1; cursor: pointer; }
.site-search-close:hover { background: var(--primary); color: var(--primary-foreground); border-color: var(--primary); }
.site-search-field input { width: 100%; box-sizing: border-box; padding: var(--space-3) 0; border: 0; border-bottom: 1px solid var(--foreground); border-radius: 0; background: transparent; color: var(--foreground); font: inherit; font-size: 18px; outline: none; }
.site-search-field input:focus { border-bottom-color: var(--primary); }
.site-search-results { display: grid; gap: var(--space-1); margin-top: var(--space-4); max-height: min(52vh, 420px); overflow-y: auto; }
.site-search-result { display: grid; gap: var(--space-1); padding: var(--space-3) 0; border-bottom: 1px solid var(--border); color: var(--foreground); text-decoration: none; }
.site-search-result:hover strong { color: var(--primary); }
.site-search-result span, .site-search-empty { color: var(--muted-foreground); font-size: 14px; line-height: 1.6; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@media (max-width: 800px) {
  .site-menu-open .primary-nav { position: absolute; top: 100%; left: 0; right: 0; display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: var(--space-2) var(--gutter) var(--space-4); border-bottom: 1px solid var(--border); background: var(--background); }
  .site-menu-open .primary-nav a { padding: var(--space-3) 0; }
  .site-menu-open .primary-nav a::after { bottom: var(--space-2); }
  .site-search-panel { padding: 76px var(--space-3) var(--space-3); }
  .site-search-dialog { padding: var(--space-4); }
}