/* =========================================================
   万博登录 · MANBET登录入口 / Shared Site CSS
   设计指纹：546fc4f32292b552
   ========================================================= */

:root {
  --color-black: #111111;
  --color-white: #FAFAFA;
  --color-gray-light: #F2F2F2;
  --color-gray-mid: #CCCCCC;
  --color-gray-dark: #666666;
  --color-blue: #0A2540;
  --color-gold: #F5B700;
  --color-red: #E63946;

  --font-heading: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'Helvetica Neue', 'PingFang SC', sans-serif;
  --font-mono: 'Courier New', monospace;

  --content-max: 1200px;
  --header-height: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-black);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-black);
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 2.5vw + 0.5rem, 2.5rem);
}

h3 {
  font-size: 1.25rem;
}

h4 {
  font-size: 1.1rem;
}

p {
  margin: 0 0 1.25rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--color-gold);
}

ul,
ol {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-gray-mid);
  margin: 64px 0;
}

/* ---------- 布局基元 ---------- */
.container {
  width: min(100% - 48px, var(--content-max));
  margin-inline: auto;
}

.section {
  padding-block: 64px;
}

.section--tight {
  padding-block: 32px;
}

/* ---------- 共享组件 ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gray-dark);
}

.section-label::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--color-gold);
}

.exhibition-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-mid);
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--color-blue);
}

.exhibition-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-red);
  flex-shrink: 0;
}

.print-border {
  border: 1px dashed var(--color-gray-mid);
  padding: 24px;
  position: relative;
  background: var(--color-white);
  box-shadow: 8px 8px 0 -4px var(--color-gray-light), 8px 8px 0 -2px var(--color-gray-mid);
}

.paper-stack {
  background: var(--color-white);
  border: 1px solid var(--color-gray-mid);
  box-shadow: 6px 6px 0 -2px var(--color-white), 6px 6px 0 -1px var(--color-gray-mid);
}

.image-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-gray-light);
  border: 1px solid var(--color-gray-mid);
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- Bento 网格与分屏 ---------- */
.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.bento-grid > * {
  grid-column: span 1;
}

@media (min-width: 700px) {
  .bento-grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .bento-grid > * {
    grid-column: span 6;
  }
}

.split-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

@media (min-width: 960px) {
  .split-hero {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 2px solid transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  background: var(--color-blue);
  color: var(--color-white);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover,
.btn:focus {
  background: var(--color-black);
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-blue) 0%, #1A4066 100%);
  border: 1px solid var(--color-gold);
  color: var(--color-white);
}

.btn--primary:hover,
.btn--primary:focus {
  background: linear-gradient(135deg, var(--color-gold) 0%, #F7CA18 100%);
  color: var(--color-black);
  border-color: var(--color-black);
  box-shadow: 0 4px 0 var(--color-red);
}

.btn--ghost {
  background: transparent;
  color: var(--color-blue);
  border-color: var(--color-blue);
}

.btn--ghost:hover,
.btn--ghost:focus {
  background: var(--color-blue);
  color: var(--color-white);
  border-color: var(--color-blue);
}

/* ---------- 页头 ---------- */
.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 8px 16px;
  background: var(--color-white);
  color: var(--color-black);
  border: 2px solid var(--color-gold);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-250%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: var(--color-black);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-red) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 1;
}

.site-header__bar {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--header-height);
  position: relative;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  line-height: 1.2;
}

.site-header__brand:hover,
.site-header__brand:focus {
  color: var(--color-white);
}

.site-header__brand-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-white);
}

.site-header__brand-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-gold);
}

.site-header__version {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--color-gold);
  border: 1px solid var(--color-gold);
  padding: 2px 8px;
  white-space: nowrap;
}

.site-header__version::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-red);
  margin-right: 6px;
}

.site-header__nav {
  margin-left: auto;
  position: relative;
}

.site-header__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__list a {
  display: block;
  padding: 8px 14px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  transition: color 0.2s ease;
}

.site-header__list a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

.site-header__list a:hover,
.site-header__list a:focus,
.site-header__list a[aria-current="page"] {
  color: var(--color-white);
}

.site-header__list a:hover::after,
.site-header__list a:focus::after,
.site-header__list a[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-header__aside {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-header__cta {
  background: var(--color-gold);
  color: var(--color-black);
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.site-header__cta:hover,
.site-header__cta:focus {
  background: var(--color-white);
  color: var(--color-black);
  transform: translateY(-1px);
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border: 1px solid var(--color-gray-dark);
  background: none;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.site-header__toggle:hover,
.site-header__toggle:focus {
  border-color: var(--color-gold);
}

.site-header__toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-white);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(4) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--color-black);
  color: rgba(255, 255, 255, 0.72);
  margin-top: 64px;
  border-top: 4px solid var(--color-gold);
}

.site-footer::before {
  content: "";
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-red);
  opacity: 0.35;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-block: 48px 32px;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-white);
  margin: 0;
  line-height: 1.2;
}

.site-footer__tagline {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 4px 0 20px;
}

.site-footer__statement {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  max-width: 42em;
  margin: 0;
}

.site-footer__col h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 16px;
}

.index-number {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gold);
}

.site-footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__col ul a {
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__col ul a:hover,
.site-footer__col ul a:focus {
  color: var(--color-gold);
  padding-left: 4px;
}

.site-footer__contact {
  font-size: 14px;
  line-height: 1.7;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-block: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.site-footer__bottom p {
  margin: 0;
}

/* ---------- 通用工具 ---------- */
.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;
}

/* ---------- 滚动显现 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.js-ready [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 焦点可见 ---------- */
:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .js-ready [data-reveal],
  .js-ready [data-reveal].is-revealed {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .site-header__toggle-bar,
  .site-header__progress,
  .btn,
  .site-header__list a::after,
  .site-footer__col ul a {
    transition: none !important;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  :root {
    --header-height: 64px;
  }

  .site-header__version {
    display: none;
  }

  .site-header__nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    margin-left: 0;
    background: var(--color-black);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 16px 24px;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.6);
  }

  .site-header__nav[data-open="true"] {
    display: block;
  }

  .site-header__list {
    flex-direction: column;
    align-items: stretch;
  }

  .site-header__list a {
    padding: 14px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 16px;
  }

  .site-header__list a::after {
    left: 8px;
    right: auto;
    width: 24px;
    bottom: 4px;
    transform: scaleX(0);
  }

  .site-header__cta {
    display: none;
  }

  .site-header__toggle {
    display: flex;
  }
}

@media (min-width: 640px) and (max-width: 959px) {
  .site-footer__top {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .site-footer__top {
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 48px;
  }
}