/* AILIMIT 公共品牌层。视觉依据：SenseGames 2026-09 生产品牌层；不影响后台。 */
:root {
  --ab-bg: #070707;
  --ab-panel: #111;
  --ab-text: #f5f5f3;
  --ab-muted: #a7a7a5;
  --ab-line: #2a2a2a;
  --ab-accent: #f0c53a;
  --ab-red: #f33434;
  --ab-side: clamp(1.25rem, 4vw, 5rem);
  --ab-nav-height: clamp(4.5rem, 4rem + 1vw, 5.625rem);
  --ab-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --sg-nav-height: var(--ab-nav-height);
  --sg-nav-side: var(--ab-side);
  --sg-brand-text: var(--ab-text);
  --sg-font-ui: var(--ab-font);
}
html { font-size: 100%; scroll-padding-top: var(--ab-nav-height); }
.ab-site { --al-dark: var(--ab-bg); --al-surface: var(--ab-panel); --al-border: var(--ab-line); --al-red: var(--ab-red); --al-gold: var(--ab-accent); --al-gold-dark: var(--ab-accent); --al-text: var(--ab-text); --al-text-dim: var(--ab-muted); --al-white: var(--ab-text); background: var(--ab-bg); color: var(--ab-text); font-family: var(--ab-font); }
.ab-site * { box-sizing: border-box; }
.ab-site a { color: inherit; }
.ab-site a:hover { color: var(--ab-accent); }
.ab-site :focus-visible { outline: 2px solid var(--ab-accent); outline-offset: 5px; }
.ab-site h1, .ab-site h2, .ab-site h3, .ab-site h4 { font-family: var(--ab-font); font-weight: 780; letter-spacing: -0.045em; line-height: 1.08; }
.ab-site main { min-height: 60vh; }
.ab-site:not(.ab-home) main { padding-top: var(--ab-nav-height); }
.ab-site .container { width: min(calc(100% - var(--ab-side) * 2), 92rem); max-width: none; padding-inline: 0; }
.ab-site .al-section { padding-block: clamp(3.5rem, 6vw, 7rem); }
.ab-site .al-section-title { margin: 0 0 2.5rem; font-size: clamp(2.5rem, 5.5vw, 5.5rem); font-weight: 800; letter-spacing: -0.055em; text-transform: none; text-align: left; }
.ab-site .al-divider { width: 100%; height: 1px; background: var(--ab-line); margin: 0 0 2.5rem; }
.ab-site .al-btn, .ab-button { display: inline-flex; align-items: center; justify-content: center; gap: 1.5rem; min-height: 3.25rem; padding: 1rem 1.35rem; border: 1px solid #626260; border-radius: 0; background: transparent; color: var(--ab-text); font: 720 0.75rem/1.3 var(--ab-font); letter-spacing: 0.055em; text-transform: uppercase; text-decoration: none; box-shadow: none; touch-action: manipulation; transition: color 160ms, background 160ms; }
.ab-site .al-btn:hover, .ab-site .ab-button:hover { color: var(--ab-bg); background: var(--ab-text); border-color: var(--ab-text); transform: none; box-shadow: none; }
.ab-site .al-btn-gold, .ab-site .ab-button--solid { color: var(--ab-bg); background: var(--ab-text); border-color: var(--ab-text); }
.ab-site .al-btn-gold:hover, .ab-button--solid:hover { background: var(--ab-accent); border-color: var(--ab-accent); }
.ab-site .al-btn-sm { padding: 0.7rem 1rem; min-height: 2.75rem; }
.ab-skip { position: fixed; top: -10rem; left: 1rem; z-index: 3000; padding: 1rem; background: var(--ab-bg); }
.ab-skip:focus { top: 1rem; }
.ab-header { position: fixed; top: 0; inset-inline: 0; height: var(--ab-nav-height); z-index: 1050; display: flex; align-items: center; gap: clamp(1rem, 3vw, 3.5rem); padding-inline: var(--ab-side); background: var(--ab-bg); color: var(--ab-text); transition: background 200ms, color 200ms; }
.ab-header--hero.is-enhanced:not(.is-scrolled) { background: transparent; color: #080808; }
.ab-wordmark { display: flex; align-items: center; flex: 0 0 auto; }
.ab-wordmark img { width: 7rem; height: 3rem; object-fit: contain; }
.ab-header--hero.is-enhanced:not(.is-scrolled) .ab-wordmark img { filter: brightness(0); }
.ab-desktop-nav { display: flex; align-self: stretch; gap: 0.2rem; margin-inline: auto; }
.ab-desktop-nav > a { display: flex; align-items: center; padding-inline: 1rem; font-size: 0.8rem; font-weight: 750; letter-spacing: 0.025em; position: relative; }
.ab-desktop-nav > a[aria-current]::after { content: ''; height: 2px; background: currentColor; position: absolute; bottom: 1.2rem; left: 1rem; right: 1rem; }
.ab-utilities { display: flex; align-items: center; gap: 1.35rem; font-size: 0.75rem; font-weight: 650; }
.ab-utilities a, .ab-utilities summary { min-height: 2.75rem; display: flex; align-items: center; }
.ab-dropdown { position: relative; }
.ab-dropdown summary { cursor: pointer; list-style: none; gap: 0.5rem; max-width: 10rem; overflow-wrap: anywhere; }
.ab-dropdown summary::after { content: '+'; font-weight: 400; font-size: 1rem; }
.ab-dropdown[open] summary::after { content: '−'; }
.ab-dropdown summary::-webkit-details-marker, .ab-mobile-menu summary::-webkit-details-marker { display: none; }
.ab-dropdown-panel { position: absolute; top: calc(100% + 1rem); right: 0; padding: 0.75rem; min-width: 11rem; background: var(--ab-panel); border: 1px solid var(--ab-line); color: var(--ab-text); }
.ab-dropdown-panel > a { padding: 0.75rem; }
.ab-dropdown-panel > a:hover { background: #222; }
.ab-nav-buy { border: 1px solid currentColor; padding: 0.75rem 1rem; gap: 1.2rem; text-transform: uppercase; }
.ab-mobile-menu { display: none; }
.ab-hero { position: relative; isolation: isolate; min-height: 100vh; min-height: 100svh; overflow: hidden; display: flex; align-items: flex-end; background: #d1dfe1; }
.sg-home-kv__media, .sg-home-kv__image { position: absolute; inset: 0; width: 100%; height: 100%; }
.sg-home-kv__media { z-index: -3; pointer-events: none; overflow: hidden; }
.sg-home-kv__image { object-fit: cover; object-position: center top; }
.sg-home-kv__layer { --sg-kv-shift-x: 0px; --sg-kv-shift-y: 0px; transform: translate3d(var(--sg-kv-shift-x), var(--sg-kv-shift-y), 0) scale(1.014); transform-origin: center; backface-visibility: hidden; }
.ab-hero::after { content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none; background: linear-gradient(0deg, rgba(3,4,5,.88), rgba(3,4,5,.12) 35%, transparent 55%); }
.ab-site .sg-home-kv__title { position: absolute; top: 18.5%; left: 9.2%; width: 35.3%; height: 29.1%; margin: 0; padding: 0; line-height: 1; }
.sg-home-kv__title img { display: block; width: 100%; height: 100%; object-fit: contain; }
.ab-hero-bottom { padding: calc(var(--ab-nav-height) + 2rem) var(--ab-side) clamp(2rem, 4vw, 4rem); width: 100%; display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem; }
.ab-hero-bottom p { font-size: 0.6875rem; font-weight: 720; letter-spacing: 0.16em; text-transform: uppercase; margin: 0 0 1rem; }
.ab-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.ab-hero .ab-button { background: rgba(7,7,7,.4); }
.ab-hero .ab-button:hover { background: var(--ab-text); }
.ab-hero-scroll { width: 3rem; height: 3rem; display: grid; place-items: center; font-size: 1.6rem; }
.ab-section { padding: clamp(4rem, 8vw, 8rem) var(--ab-side); }
.ab-section-inner { max-width: 92rem; margin-inline: auto; }
.ab-eyebrow { font-size: 0.7rem; font-weight: 720; letter-spacing: 0.12em; text-transform: uppercase; line-height: 1.5; color: var(--ab-muted); }
.ab-intro-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(2rem, 8vw, 8rem); align-items: start; }
.ab-site .ab-intro-grid h2 { font-size: clamp(2.6rem, 5vw, 5.6rem); line-height: .98; max-width: 12ch; margin: 1.5rem 0 0; }
.ab-intro-copy p { font-size: clamp(1.1rem, 1.5vw, 1.4rem); color: #c5c5c3; line-height: 1.7; margin-bottom: 2rem; }
.ab-intro-copy .ab-eyebrow { margin-top: 2rem; font-size: .7rem; }
.ab-section-head { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; margin-bottom: 3rem; }
.ab-site .ab-section-head > h2, .ab-site .ab-page-title { font-size: clamp(3rem, 6.5vw, 6.5rem); font-weight: 800; letter-spacing: -.065em; line-height: .95; margin: 0; }
.ab-news-section { border-block: 1px solid var(--ab-line); }
.ab-news-layout { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: clamp(2rem, 4vw, 4rem); }
.ab-news-feature { display: block; background: var(--ab-panel); }
.ab-news-image { aspect-ratio: 16 / 9; overflow: hidden; }
.ab-news-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 600ms; }
.ab-news-feature:hover img { transform: scale(1.025); }
.ab-news-copy { padding: clamp(1.5rem, 3vw, 3rem); }
.ab-news-copy .ab-eyebrow { color: var(--ab-accent); }
.ab-news-copy h2 { font-size: clamp(1.8rem, 2.5vw, 2.8rem); margin: 1rem 0; }
.ab-news-copy p { color: var(--ab-muted); }
.ab-text-link { display: inline-flex; justify-content: space-between; gap: 2rem; font-size: .75rem; font-weight: 700; text-transform: uppercase; margin-top: 1rem; }
.ab-news-updates > .ab-eyebrow { margin: 0 0 1.5rem; }
.ab-update { display: block; border-top: 1px solid var(--ab-line); padding: 1.5rem 2rem 1.5rem 0; position: relative; }
.ab-update time { font-size: .7rem; color: var(--ab-muted); }
.ab-update h3 { font-size: clamp(1.2rem, 1.75vw, 1.85rem); margin: .75rem 0 0; }
.ab-update > span { position: absolute; right: 0; top: 2rem; }
.ab-known-issues { border-top: 1px solid var(--ab-line); margin-top: 1rem; }
.ab-known-issues summary { cursor: pointer; padding: 1.25rem 0; color: var(--ab-muted); font-size: .8rem; }
.ab-known-issues a { display: block; margin: 1rem 0; font-size: .95rem; }
.ab-muted { color: var(--ab-muted); }
.ab-player-banner { display: grid; grid-template-columns: 1.3fr 1fr; align-items: center; gap: clamp(2rem, 6vw, 6rem); }
.ab-player-banner img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.ab-player-banner h2 { font-size: clamp(3rem, 6vw, 6rem); margin: 1rem 0; }
.ab-player-banner p { color: var(--ab-muted); margin-bottom: 2rem; }
.ab-achievement-details { margin-top: 3rem; border-block: 1px solid var(--ab-line); }
.ab-achievement-details > summary { padding: 1.5rem 0; cursor: pointer; font-size: .9rem; font-weight: 650; }
.ab-home .al-ach-grid { max-height: 32rem; overflow-y: auto; padding: 1rem; }
.ab-home #petition { border-top: 1px solid var(--ab-line); }
.ab-petition-heading { text-align: center; margin-bottom: 3rem; }
.ab-petition-heading h2 { font-size: clamp(2.75rem, 5vw, 5rem); margin-bottom: 1rem; }
.ab-petition-heading p { color: var(--ab-muted); max-width: 35rem; margin-inline: auto; }
.ab-site .al-petition-wall { max-width: 80rem; margin-inline: auto; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1rem; }
.ab-site .al-petition-card { border: none; background: #141414; border-radius: 0; padding: 1.5rem; min-width: 0; box-shadow: none; }
.ab-site .al-petition-card-content { font-family: var(--ab-font); color: var(--ab-text); font-size: 1rem; overflow-wrap: anywhere; }
.ab-site .al-petition-card-meta { font-family: var(--ab-font); flex-wrap: wrap; }
.ab-site .al-petition-card:nth-child(3n+2) { transform: translateY(1rem); }
.ab-site .al-petition-input, .ab-site .al-input { border-radius: 0; background: var(--ab-panel); border-color: #444; color: var(--ab-text); }
.ab-site .al-petition-form { max-width: 42rem; margin: 0 auto 3rem; }
.ab-footer { padding: clamp(3rem, 6vw, 6rem) var(--ab-side) 2rem; background: #0b0b0b; border-top: 1px solid var(--ab-line); }
.ab-footer-top { display: grid; grid-template-columns: 1.1fr repeat(4,1fr); gap: 2rem; max-width: 92rem; margin-inline: auto; }
.ab-footer-logo img { width: 9rem; }
.ab-rating { display: flex; align-items: center; gap: 1.5rem; max-width: 92rem; margin: 0 auto 4rem; padding-bottom: 2rem; border-bottom: 1px solid var(--ab-line); font-size: .75rem; color: var(--ab-muted); }
.ab-rating img { width: 4rem; flex-shrink: 0; }
.ab-rating p { margin: .5rem 0; }
.ab-footer h2 { font-size: .7rem; font-weight: 750; letter-spacing: .09em; text-transform: uppercase; margin-bottom: 1.7rem; }
.ab-footer-top > div > a { display: block; width: fit-content; padding-block: .45rem; font-size: .8rem; color: var(--ab-muted); }
.ab-footer-bottom { max-width: 92rem; margin: 4rem auto 0; padding-top: 2rem; border-top: 1px solid var(--ab-line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; font-size: .7rem; color: var(--ab-muted); }
.ab-footer-bottom nav, .ab-footer-bottom > div { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.ab-footer-bottom [aria-current] { color: var(--ab-text); text-decoration: underline; text-underline-offset: .4rem; }
.ab-footer-bottom p { width: 100%; margin: 0; font-size: .625rem; }
.ab-footer-bottom p a { margin-left: 1rem; }
/* 现有业务组件消费新品牌，不更改 ID、权限、数据合同或 Bootstrap 行为。 */
.ab-site .al-news-view { max-width: 54rem; padding-inline: var(--ab-side); margin: 4rem auto 6rem; }
.ab-site .al-news-card { border: none; border-radius: 0; background: var(--ab-panel); }
.ab-site .al-news-card:hover { transform: none; box-shadow: none; }
.ab-site .al-content { font-size: 1.05rem; line-height: 1.9; }
.ab-site .al-content h1, .ab-site .al-content h2 { font-weight: 780; }
.ab-site .al-auth-box { border: 1px solid var(--ab-line); border-radius: 0; padding: clamp(1.5rem,4vw,3rem); background: var(--ab-panel); box-shadow: none; }
.ab-site .al-auth-container { padding-top: 3rem; min-height: 60vh; }
.ab-site .al-sv-wrap { max-width: 58rem; margin-top: 3rem; }
.ab-site .al-sv-term { background: transparent; border: none; box-shadow: none; }
.ab-site .al-sv-term-header { display: none; }
.ab-site .al-sv-title { font-size: clamp(2rem,4vw,4rem); font-weight: 780; letter-spacing: -.045em; }
.ab-site .al-sv-content, .ab-site .al-sv-meta { font-family: var(--ab-font); }
.ab-site .al-vg-panel, .ab-site .al-vg-card, .ab-site .al-radio-card { border-radius: 0; box-shadow: none; }
.ab-site .al-filter { border-radius: 0; }
.ab-site .al-vg-page { padding-top: 3rem; }
.ab-site .al-vg-title { font-family: var(--ab-font); font-size: clamp(3rem,6vw,6rem); font-weight: 800; letter-spacing: -.055em; }
.ab-site .al-vg-console, .ab-site .al-vg-tracker { background: var(--ab-panel); border-color: var(--ab-line); border-radius: 0; box-shadow: none; }
.ab-site .al-vg-tracker-head { background: transparent; border-color: var(--ab-line); }
.ab-site .al-vg-kicker, .ab-site .al-vg-console-label, .ab-site .al-vg-label, .ab-site .al-vg-tracker-head { font-family: var(--ab-font); }
.ab-site .al-sv-sep-line { height: 1px; background: var(--ab-line); color: transparent; }
.ab-site .al-sv-term-body { padding: 0; }
.ab-site .al-auth-box > h1 { font-size: 2.75rem; margin-bottom: 2rem; }
.ab-site .ab-reading { max-width: 54rem; padding-block: 4rem 6rem; }
.ab-site .ab-reading > h1 { font-size: clamp(2.5rem,5vw,4rem); margin-bottom: 3rem; }
.ab-slogan { max-width: none !important; font-size: clamp(2.4rem,4.5vw,5rem) !important; }
.ab-site .al-fade-in { opacity: 1; transform: none; }
.ab-noscript { display: block; padding: 1rem; border: 1px solid var(--ab-line); color: var(--ab-muted); margin-block: 1rem; }
@media (min-width: 64rem) { .ab-site:not(.ab-home) main > .al-section:first-child { margin-top: 0 !important; } }
@media (max-width: 64rem) {
  .ab-desktop-nav, .ab-nav-buy { display: none !important; }
  .ab-utilities { margin-left: auto; gap: 1rem; }
  .ab-header { gap: 1.25rem; }
  .ab-mobile-menu { display: block; }
  .ab-mobile-menu > summary { list-style: none; cursor: pointer; width: 2.75rem; height: 2.75rem; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: .35rem; }
  .ab-mobile-menu > summary span { width: 1.2rem; height: 2px; background: currentColor; }
  .ab-mobile-menu[open] > summary span:first-child { transform: translateY(.23rem) rotate(45deg); }
  .ab-mobile-menu[open] > summary span:last-child { transform: translateY(-.23rem) rotate(-45deg); }
  .ab-mobile-menu > nav { position: absolute; top: var(--ab-nav-height); inset-inline: 0; padding: 1.5rem var(--ab-side) 2.5rem; background: var(--ab-bg); color: var(--ab-text); max-height: calc(100vh - var(--ab-nav-height)); max-height: calc(100dvh - var(--ab-nav-height)); overflow-y: auto; border-bottom: 1px solid var(--ab-line); }
  .ab-mobile-menu nav a { display: block; font-size: clamp(1.75rem,5vw,3rem); font-weight: 750; letter-spacing: -.04em; padding-block: .85rem; }
  .ab-mobile-menu nav a[aria-current] { color: var(--ab-accent); }
  .ab-footer-top { grid-template-columns: repeat(4,1fr); }
  .ab-footer-logo { grid-column: 1 / -1; margin-bottom: 1rem; }
}
@media (max-width: 48rem) {
  .ab-intro-grid, .ab-news-layout, .ab-player-banner { grid-template-columns: minmax(0,1fr); }
  .ab-intro-grid h2 { max-width: 15ch; }
  .ab-section-head { align-items: start; flex-direction: column; }
  .ab-section-head .ab-button { min-height: 2.75rem; }
  .ab-site .al-petition-wall { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .ab-site .al-petition-card:nth-child(3n+2) { transform: none; }
  .ab-footer-top { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 2.5rem 1rem; }
}
@media (max-width: 40rem) {
  .sg-home-kv__image { object-position: 64% top; }
  .ab-site .sg-home-kv__title { top: calc(var(--ab-nav-height) + 1.5rem); left: var(--ab-side); width: 55%; height: auto; }
  .sg-home-kv__title img { height: auto; }
  .ab-hero-bottom { padding-bottom: 2rem; }
  .ab-hero-scroll { display: none; }
  .ab-hero-bottom .ab-button { padding: .9rem 1rem; gap: 1rem; font-size: .7rem; }
  .ab-wordmark img { width: 5.7rem; }
  .ab-login { font-size: .7rem; }
  .ab-header { gap: .65rem; }
  .ab-site .al-petition-wall { grid-template-columns: minmax(0,1fr); }
  .ab-site .al-section-title { overflow-wrap: anywhere; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ab-site *, .ab-site *::before, .ab-site *::after { animation: none !important; transition: none !important; }
  .sg-home-kv__layer { --sg-kv-shift-x: 0px !important; --sg-kv-shift-y: 0px !important; }
}