:root{--qa-guard:start}

:where(main :is([class*="grid"], [style*="grid"], [class*="layout"], .row, [class*="cols"], [class*="split"], [class*="columns"],
               [data-component], ol, ul, dl) > *) { min-width: 0; }
:where(main img, main video, main iframe) { max-width: 100%; }
:where(main img) { height: auto; }
:where(main pre) { overflow-x: auto; }
:where(main table) { max-width: 100%; }
:where(h1, h2, h3, h4, h5, h6) { line-height: 1.3; }
:where(footer a:not([class*="btn"]), .breadcrumb a, nav li a) { display: inline-block; padding-block: 4px; }
img[data-role="hero"] { object-position: 75% 30% !important; } 
.navbar-brand:has(> img.site-logo) { background: none !important; padding: 0 !important; box-shadow: none !important; border: 0 !important; }
.navbar-brand > img.site-logo { height: 40px; width: auto; display: block; }

.navbar:has(> div:empty):has(> :is([class*="container"], [class*="inner"])) { flex-direction: column; align-items: stretch; }
.navbar .navbar-brand { flex-shrink: 0; }
@media (min-width: 576px) {  
  .navbar :is(a, button)[class*="btn"] { flex-shrink: 0; }
  .navbar :is(.nav-link, a[class*="btn"], button[class*="btn"]) { white-space: nowrap; }
}

:is(.navbar, .navbar > *, .navbar :has(> .navbar-collapse)):has(.navbar-collapse:is(.show, .collapsing)) { height: auto !important; max-height: none !important; }

@media (min-width: 992px) {
  main .row > [class*="col"]:has(> img[data-role="section"]:only-child) { align-self: stretch; }
  main .row > [class*="col"] > img[data-role="section"]:only-child { height: 100% !important; object-fit: cover; }
}

main > :is(section, div):not(:first-child):not(:empty, [class*="divider"], [class*="separator"], [aria-hidden="true"]) { padding-block: clamp(28px, 3.5vw, 44px) !important; margin-block: 0 !important; }
main > :first-child, main > :first-child > :is(section, div) { min-height: 0 !important; }
main > :first-child { padding-block: clamp(24px, 4vw, 56px) !important; }
main :is(h1, h2, h3) { line-height: 1.35 !important; }
main :is(p, li, td, dd) { line-height: 1.55 !important; }
main > :is(section, div) :is(h2):first-of-type { margin-bottom: 12px; }
@media (max-width: 575.98px) {
  main [style*="grid-template-columns"]:not([style*="auto-fit"]):not([style*="auto-fill"]) { grid-template-columns: 1fr !important; }
  
  :is([data-component="game-grid"], [data-component="game-grid"] *):has(> .game-card) {
    display: grid !important; grid-template-columns: repeat(2, minmax(0, 1fr)) !important; gap: 12px !important; }
  .game-card .game-tag { position: static !important; display: inline-block; margin-top: 6px; }
  
  main :is(div, p, nav):has(> :is(a, button)[class*="btn"]):not([class*="scroll"], [class*="strip"], [class*="tab"], [class*="chip"]) {
    flex-wrap: wrap !important; flex-shrink: 1 !important; max-width: 100%; }
  main div:has(> :is(div, p) > :is(a, button)[class*="btn"]):not([class*="scroll"], [class*="strip"], [class*="tab"], [class*="chip"]) {
    flex-wrap: wrap !important; }  
  
  main :is(ol, ul, [data-component="steps"], [data-component="steps"] div):not([class*="scroll"], [class*="strip"], [class*="tab"], [class*="chip"]) {
    flex-wrap: wrap !important; }
  main :is(a, button)[class*="btn"] { white-space: normal !important; }
  
  main table:not(:is([class*="responsive"], [class*="scroll"], [style*="overflow"]) table) {
    display: block; max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .game-card :is(.game-card-body, div:has(> h3)) { padding: 10px 12px 12px !important; }
}
.toc-auto { margin: 0 auto 24px; max-width: 1100px; padding: 12px 16px; border: 1px solid var(--border, rgba(255,255,255,.15)); border-radius: 12px; }
.toc-auto summary { cursor: pointer; font-weight: 700; min-height: 44px; display: flex; align-items: center; }
.toc-auto ol { margin: 8px 0 0; padding-left: 1.4em; }
[data-component="toc"] a { display: inline-block; padding-block: 4px; }
html { scroll-padding-top: 88px; }

:is(header, footer, main > :not(:first-child)) :is(.container, .container-fluid, .container-sm, .container-md, .container-lg, .container-xl, .container-xxl) {
  max-width: 1320px !important; margin-inline: auto !important; }
main > :not(:has([class*="container"])) { padding-inline: max(16px, calc((100% - 1320px) / 2)) !important; }  

:where(main > :first-child > :not([class*="container"], :has([class*="container"]), img, picture, video, [style*="absolute"])) {
  padding-inline: max(16px, calc((100% - 1320px) / 2)); }
main > :first-child :is(.container, .container-fluid, .container-sm, .container-md, .container-lg, .container-xl, .container-xxl):not(:has(> img[data-role="hero"])) {
  max-width: 1320px !important; margin-inline: auto !important; }
:where(main [style*="overflow-x"][style*="flex"]:not([style*="wrap"])) > * { min-width: auto; }

:where(main > :not(:first-child), body > footer) { content-visibility: auto; contain-intrinsic-size: auto 600px; }
@media (max-width: 767.98px) { :where(main > :not(:first-child), body > footer) { contain-intrinsic-size: auto 900px; } }  
:root{--qa-guard:end}

:root {
      --color-bg: #fff5f5;
      --color-surface: #fffcfc;
      --color-surface-alt: #f5ebeb;
      --color-primary: #ed4706;
      --color-primary-text: #1a1a1a;
      --color-primary-dark: #7d0e3a;
      --color-primary-darker: #580a29;
      --color-accent: #c2591c;
      --color-text: #2d2d2d;
      --color-text-muted: #666666;
      --color-border: #b88c41;
      --radius-sm: 2px;
      --radius-md: 3px;
      --radius-lg: 4px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scrollbar-color: var(--color-border) var(--color-bg);
    }

    body {
      font-family: "Noto Serif Bengali", serif;
      font-size: 1rem;
      font-weight: 400;
      line-height: 1.6;
      color: var(--color-text);
      background-color: var(--color-bg);
    }

    ::selection {
      background-color: var(--color-primary-dark);
      color: #fff;
    }

    a {
      color: var(--color-primary-dark);
      text-decoration: none;
      text-underline-offset: 3px;
    }

    a:hover {
      color: var(--color-primary);
    }

    a:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
      border-radius: var(--radius-md);
    }

    h1, h2, h3, h4, h5, h6 {
      font-family: "Atma", sans-serif;
      font-weight: 700;
      line-height: 1.35;
      color: var(--color-primary-text);
      letter-spacing: -0.02em;
    }

    h1 {
      font-size: clamp(2rem, 5.5vw, 5.5rem);
    }

    h2 {
      font-size: clamp(1.75rem, 3vw, 2.75rem);
      margin-bottom: 1.5rem;
    }

    h3 {
      font-size: 1.5rem;
      font-weight: 600;
    }

    main {
      position: relative;
      z-index: 1;
    }

    main > section, main > div {
      padding: clamp(28px, 3.5vw, 44px) 0;
    }

    .container, .container-lg, .container-xl {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    header {
      background-color: var(--color-primary-dark);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    }

    .navbar {
      padding: 0.75rem 2rem;
      min-height: 64px;
      display: flex;
      align-items: center;
    }

    .navbar-brand {
      font-family: "Atma", sans-serif;
      font-size: 1.5rem;
      font-weight: 700;
      color: #fff !important;
      text-decoration: none;
      margin-right: 2rem;
    }

    .navbar-brand img {
      height: 40px;
      width: auto;
    }

    .nav-link {
      color: #fff !important;
      font-size: 0.95rem;
      font-weight: 400;
      padding: 0.5rem 1rem !important;
      position: relative;
      opacity: 1;
      transition: opacity 0.2s ease-out;
    }

    .nav-link:hover {
      opacity: 0.8;
    }

    .nav-link.active {
      color: #fff !important;
      border-bottom: 2px solid var(--color-border);
      padding-bottom: calc(0.5rem - 2px) !important;
    }

    .navbar-toggler {
      border-color: #fff;
    }

    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23fff' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    .btn-navbar-auth {
      display: flex;
      gap: 0.5rem;
      margin-left: auto;
    }

    .btn-login {
      background-color: transparent;
      border: 1px solid #fff;
      color: #fff;
      padding: 0.5rem 1rem;
      font-size: 0.95rem;
      font-weight: 400;
      border-radius: var(--radius-md);
      text-decoration: none;
      transition: background-color 0.2s ease-out;
    }

    .btn-login:hover {
      background-color: rgba(255, 255, 255, 0.1);
      color: #fff;
    }

    .btn-register {
      background-color: var(--color-primary);
      color: #fff;
      border: none;
      padding: 0.5rem 1.5rem;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-lg);
      text-decoration: none;
      transition: background-color 0.2s ease-out;
    }

    .btn-register:hover {
      background-color: #d63f05;
      color: #fff;
    }

    .btn-primary {
      background-color: var(--color-primary);
      border: 1px solid var(--color-primary);
      color: #fff;
      padding: 12px 32px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: background-color 0.2s ease-out;
      text-decoration: none;
      display: inline-block;
      cursor: pointer;
    }

    .btn-primary:hover {
      background-color: #d63f05;
      border-color: #d63f05;
      color: #fff;
    }

    .btn-primary:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
    }

    .btn-secondary {
      background-color: #fff;
      border: 2px solid var(--color-primary-dark);
      color: var(--color-primary-text);
      padding: 11px 31px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: background-color 0.2s ease-out;
      text-decoration: none;
      display: inline-block;
      cursor: pointer;
    }

    .btn-secondary:hover {
      background-color: var(--color-surface-alt);
      color: var(--color-primary-text);
    }

    .btn-secondary:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
    }

    .btn-tertiary {
      background-color: var(--color-primary);
      border: none;
      color: #fff;
      padding: 10px 28px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: background-color 0.2s ease-out;
      text-decoration: none;
      display: inline-block;
      cursor: pointer;
    }

    .btn-tertiary:hover {
      background-color: #d63f05;
      color: #fff;
    }

    .card {
      background-color: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: border-color 0.2s ease-out, box-shadow 0.2s ease-out;
    }

    .card:hover {
      border-color: var(--color-primary);
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    }

    footer {
      background-color: var(--color-primary-dark);
      background-image: repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.02) 0px, rgba(0, 0, 0, 0.02) 1px, transparent 1px, transparent 2px);
      color: #fff;
      padding: 3rem 2rem;
      margin-top: 3rem;
    }

    footer a {
      color: #fff;
      text-decoration: none;
      transition: opacity 0.2s ease-out;
    }

    footer a:hover {
      opacity: 0.8;
    }

    footer a:focus-visible {
      outline: 2px solid var(--color-border);
      outline-offset: 2px;
    }

    .footer-container {
      max-width: 1200px;
      margin: 0 auto;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1fr;
      gap: 2rem;
      margin-bottom: 2rem;
    }

    .footer-logo {
      font-family: "Atma", sans-serif;
      font-size: 1.5rem;
      font-weight: 700;
      color: #fff;
    }

    .footer-logo img {
      height: 36px;
      width: auto;
      margin-bottom: 0.5rem;
    }

    .footer-responsibility {
      font-size: 0.85rem;
      opacity: 0.9;
      margin-top: 1rem;
      display: flex;
      gap: 0.5rem;
      align-items: center;
    }

    .footer-cols {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 2rem;
      margin: 2rem 0;
    }

    .footer-col h4 {
      font-family: "Atma", sans-serif;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: #fff;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col li {
      margin-bottom: 0.5rem;
    }

    .footer-col a {
      font-size: 0.9rem;
      opacity: 0.9;
    }

    .footer-bottom {
      border-top: 1px solid var(--color-border);
      padding-top: 1.5rem;
      text-align: center;
      font-size: 0.85rem;
      opacity: 0.85;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1rem;
    }

    .footer-badge {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      justify-content: center;
      font-size: 0.85rem;
    }

    .footer-badge-dot {
      display: inline-block;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background-color: var(--color-border);
    }

    @media (max-width: 992px) {
      .navbar {
        padding: 0.75rem 1.5rem;
      }

      .navbar-brand {
        margin-right: 1rem;
      }

      .btn-navbar-auth {
        position: absolute;
        right: 1.5rem;
        top: 50%;
        transform: translateY(-50%);
        gap: 0.25rem;
      }

      .btn-login, .btn-register {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
      }

      .footer-cols {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
      }
    }

    @media (max-width: 576px) {
      h1 {
        font-size: 1.75rem;
      }

      h2 {
        font-size: 1.25rem;
      }

      .btn-navbar-auth {
        flex-direction: column;
        gap: 0.25rem;
      }

      .btn-login, .btn-register {
        padding: 0.35rem 0.6rem;
        font-size: 0.8rem;
      }

      .footer-cols {
        grid-template-columns: 1fr;
        gap: 1.5rem;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }
    }

/* site-fix 2026-11-05：手机/平板上登录注册按钮原来绝对定位、竖排，压在汉堡菜单上 → 和菜单按钮排成一行 */
@media (max-width: 1399.98px) {
  .navbar .btn-navbar-auth { position: static !important; transform: none !important; flex-direction: row !important;
    margin-left: auto !important; margin-right: .5rem; order: 1; gap: .4rem !important; }
  .navbar .navbar-toggler { order: 2; }
  .navbar .navbar-collapse { order: 3; }
}
@media (max-width: 400px) { .navbar .btn-navbar-auth .btn-login { display: none; } }


/* site-fix 2026-11-05：只有一个子元素（container）的版块不分栏（AI 把 hero 写成两栏 grid，内容只占左半边） */
main > section:has(> [class*="container"]:only-child) { grid-template-columns: 1fr !important; }

/* unify-site:start */
/* 组件统一（参考页：{"details": "index.html", "summary": "index.html", "answer": "index.html", "th": "index.html", "td": "index.html", "h2": "index.html", "container": "index.html"}） */
main details:not(.toc-card):not([class*=toc]) { border-top: 1px solid rgb(184, 140, 65) !important; border-right: 1px solid rgb(184, 140, 65) !important; border-bottom: 1px solid rgb(184, 140, 65) !important; border-left: 1px solid rgb(184, 140, 65) !important; background-color: rgb(255, 252, 252) !important; border-radius: 4px !important; padding: 0px !important; margin-bottom: 16px !important; box-shadow: none !important; }
main details:not(.toc-card):not([class*=toc]) > summary { font-size: 16px !important; font-weight: 600 !important; padding: 20px !important; color: rgb(45, 45, 45) !important; line-height: 25.6px !important; }
main details:not(.toc-card):not([class*=toc]) > summary ~ * { font-size: 16px !important; color: rgb(45, 45, 45) !important; padding: 0px !important; line-height: 25.6px !important; }
main table { width: 100%; border-collapse: collapse !important; }
main table th { background-color: rgba(0, 0, 0, 0) !important; color: rgb(102, 102, 102) !important; padding: 12px !important; font-size: 14.4px !important; font-weight: 600 !important; text-align: left !important; border-bottom: 1px solid rgb(184, 140, 65) !important; }
main table td { padding: 12px !important; font-size: 14.4px !important; border-bottom: 1px solid rgb(184, 140, 65) !important; color: rgb(45, 45, 45) !important; }
main section > h2, main section > [class*=container] > h2, main section > [class*=container] > [class*=head] > h2, main section > [class*=container] > [class*=title] > h2, main section > div > h2 { font-size: 43.2px !important; line-height: 58.32px !important; }
/* unify-site:end */