/* =========================================================
   MG游戏中心 · 共享样式 /assets/site.css
   深空蓝网格基底 + 霓虹青/电光紫/品红撞色 · 切角档案面板
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body { margin: 0; }

h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

img, svg, video, canvas { display: block; max-width: 100%; height: auto; }

button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }

table { width: 100%; border-collapse: collapse; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --void: #0B1026;
  --midnight: #131A3A;
  --cyan: #2BE8D5;
  --violet: #8A5CFF;
  --magenta: #FF3D8B;
  --orange: #FFA23A;
  --lime: #7CFF6B;
  --ice: #EAF2FF;
  --mist: #9AA8CC;
  --mint: #CFF7F2;

  --line: rgba(154, 168, 204, 0.18);
  --line-soft: rgba(154, 168, 204, 0.12);
  --line-cyan: rgba(43, 232, 213, 0.32);
  --panel: rgba(19, 26, 58, 0.86);
  --panel-deep: rgba(11, 16, 38, 0.94);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: var(--font-display);
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --shell-w: 1220px;
  --gutter: clamp(16px, 4vw, 32px);
  --cut: 22px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--ice);
  background-color: var(--void);
  background-image:
    linear-gradient(rgba(43, 232, 213, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 232, 213, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--ice);
}

h1 { font-size: clamp(34px, 5.4vw, 62px); line-height: 1.02; }
h2 { font-size: clamp(24px, 3.4vw, 36px); }
h3 { font-size: clamp(18px, 2.2vw, 24px); line-height: 1.15; }

p { max-width: 760px; }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: #ffffff; }

strong { color: #ffffff; font-weight: 700; }

::selection { background: var(--magenta); color: #ffffff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

#main-content { scroll-margin-top: 96px; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 4. 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(46px, 7vw, 92px); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: clamp(22px, 3vw, 38px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(43, 232, 213, 0));
}

.lede {
  font-size: clamp(16px, 1.7vw, 18.5px);
  line-height: 1.82;
  color: var(--mist);
  max-width: 680px;
}

.divider-slant {
  height: 1px;
  border: 0;
  margin-block: clamp(28px, 5vw, 56px);
  background: linear-gradient(90deg, rgba(43, 232, 213, 0), var(--line-cyan), rgba(138, 92, 255, 0));
  transform: skewY(-1.2deg);
}

/* ---------- 5. 正文阅读区 ---------- */
.prose {
  font-size: 16.5px;
  line-height: 1.88;
  color: #D6E0FA;
}

.prose > p { margin-bottom: 1.15em; max-width: 680px; }
.prose h2 { margin: 1.7em 0 0.6em; font-size: clamp(22px, 2.7vw, 28px); }
.prose h3 { margin: 1.5em 0 0.5em; font-size: clamp(18px, 2vw, 20px); }

.prose ul { margin: 0 0 1.2em; }

.prose li {
  position: relative;
  padding-left: 1.1em;
  margin-bottom: 0.5em;
  max-width: 680px;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.prose a {
  border-bottom: 1px solid rgba(43, 232, 213, 0.45);
}

.prose blockquote {
  margin: 1.4em 0;
  padding: 16px 22px;
  border-left: 3px solid var(--violet);
  background: rgba(138, 92, 255, 0.1);
  color: var(--ice);
  max-width: 680px;
}

/* ---------- 6. 面包屑 ---------- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
  padding-block: 16px;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(154, 168, 204, 0.5);
}

.breadcrumbs a { color: var(--mist); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--ice); }

/* ---------- 7. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: transform 0.18s var(--ease), background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.btn-cta {
  background-image: linear-gradient(120deg, var(--magenta), var(--violet));
  color: #ffffff;
}

.btn-cta:hover {
  color: #ffffff;
  transform: translateY(-2px);
}

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

.btn-ghost:hover {
  background-color: rgba(43, 232, 213, 0.12);
  color: #ffffff;
}

/* ---------- 8. 标签 / 卡片 / 数据 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--cyan);
  background-color: rgba(43, 232, 213, 0.08);
  border: 1px solid var(--line-cyan);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
}

.tag--violet { color: #CDBAFF; background-color: rgba(138, 92, 255, 0.16); border-color: rgba(138, 92, 255, 0.48); }
.tag--magenta { color: #FFA7C9; background-color: rgba(255, 61, 139, 0.16); border-color: rgba(255, 61, 139, 0.5); }
.tag--orange { color: #FFCE93; background-color: rgba(255, 162, 58, 0.14); border-color: rgba(255, 162, 58, 0.5); }
.tag--lime { color: #B6FFAB; background-color: rgba(124, 255, 107, 0.12); border-color: rgba(124, 255, 107, 0.45); }
.tag--muted { color: var(--mist); background-color: rgba(154, 168, 204, 0.08); border-color: var(--line); }

.cut-card {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background-color: var(--panel);
  background-image: linear-gradient(160deg, rgba(19, 26, 58, 0.95), rgba(11, 16, 38, 0.98));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.cut-card--mint {
  background-image: none;
  background-color: var(--mint);
  color: #0B1026;
  border-color: rgba(11, 16, 38, 0.16);
}

.cut-card--mint h2,
.cut-card--mint h3 { color: #0B1026; }

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 15px 18px;
  background-color: rgba(19, 26, 58, 0.72);
  border-left: 3px solid var(--cyan);
}

.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.stat-label {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 9. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background-image: linear-gradient(140deg, rgba(138, 92, 255, 0.22), rgba(43, 232, 213, 0.12));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

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

.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }

/* ---------- 10. 头部 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  font-weight: 700;
  font-size: 14px;
  color: var(--void);
  background-color: var(--cyan);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  color: var(--ice);
  background-image: linear-gradient(180deg, rgba(11, 16, 38, 0.97), rgba(11, 16, 38, 0.9));
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(43, 232, 213, 0.22);
  transition: box-shadow 0.25s var(--ease);
}

.site-header[data-stuck] {
  box-shadow: 0 20px 44px -28px rgba(43, 232, 213, 0.55);
}

.scroll-meter {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background-color: rgba(43, 232, 213, 0.12);
  overflow: hidden;
}

.scroll-meter > span {
  display: block;
  width: 0;
  height: 100%;
  background-image: linear-gradient(90deg, var(--cyan), var(--violet) 55%, var(--magenta));
}

.hud-top {
  background-color: rgba(19, 26, 58, 0.55);
  border-bottom: 1px solid var(--line-soft);
}

.hud-top-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  padding-block: 11px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--ice);
}

.brand:hover { color: var(--ice); }

.brand-mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--void);
  background-image: linear-gradient(150deg, var(--cyan), var(--violet));
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-name {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.01em;
  line-height: 1.2;
}

.brand-desc {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.hud-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 20px;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--mist);
}

.hud-item { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }

.hud-key {
  padding: 2px 7px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border: 1px solid var(--line-cyan);
}

.hud-nav-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-block: 5px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 15px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  background-color: rgba(43, 232, 213, 0.08);
  border: 1px solid var(--line-cyan);
  cursor: pointer;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bars > span {
  display: block;
  height: 2px;
  background-color: currentColor;
}

.nav-toggle-bars > span:nth-child(2) { width: 68%; }

.nav-toggle[aria-expanded="true"] {
  background-color: rgba(43, 232, 213, 0.2);
  color: #ffffff;
}

.site-nav { flex: 1 1 auto; min-width: 0; }

.nav-list { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; }

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background-color: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.nav-list a:hover { color: var(--ice); }
.nav-list a:hover::after { transform: scaleX(1); }

.nav-list a[aria-current="page"] { color: var(--cyan); }
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

.nav-index {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  white-space: nowrap;
}

.nav-index::before {
  content: "";
  width: 7px;
  height: 7px;
  background-color: var(--lime);
  box-shadow: 0 0 10px rgba(124, 255, 107, 0.9);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 110px);
  padding-top: clamp(44px, 6vw, 76px);
  padding-bottom: 26px;
  font-size: 14px;
  color: var(--mist);
  background-image: linear-gradient(180deg, rgba(19, 26, 58, 0.4), rgba(11, 16, 38, 0.99) 55%);
  border-top: 1px solid rgba(43, 232, 213, 0.24);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 170px;
  background-image:
    linear-gradient(105deg, rgba(138, 92, 255, 0.18), rgba(138, 92, 255, 0) 55%),
    linear-gradient(255deg, rgba(255, 61, 139, 0.14), rgba(255, 61, 139, 0) 50%);
  pointer-events: none;
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.6fr);
  gap: clamp(26px, 5vw, 64px);
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line-soft);
}

.brand--footer { margin-bottom: 16px; }

.footer-pitch {
  max-width: 320px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.footer-stamp {
  margin-top: 14px;
  font-size: 12.5px;
  color: rgba(154, 168, 204, 0.85);
}

.footer-stamp .mono { color: var(--cyan); }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px 18px;
}

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.footer-col-title::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  margin-top: 9px;
  background-color: var(--violet);
}

.footer-links li + li { margin-top: 9px; }

.footer-links a {
  display: inline-block;
  font-size: 14px;
  color: var(--mist);
  transition: color 0.16s var(--ease), transform 0.16s var(--ease);
}

.footer-links a:hover {
  color: var(--cyan);
  transform: translateX(4px);
}

.footer-contact {
  position: relative;
  display: grid;
  gap: 8px;
  padding-block: 24px;
  border-bottom: 1px solid var(--line-soft);
}

.contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  max-width: none;
  font-size: 14px;
  color: var(--ice);
}

.contact-key {
  padding: 2px 8px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border: 1px solid var(--line-cyan);
  background-color: rgba(43, 232, 213, 0.07);
}

.footer-note {
  max-width: 620px;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(154, 168, 204, 0.9);
}

.footer-legal {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  padding-top: 20px;
  font-size: 12.5px;
}

.footer-copy { max-width: none; }

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-legal-links a {
  color: var(--mist);
  border-bottom: 1px dashed rgba(154, 168, 204, 0.35);
}

.footer-legal-links a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.footer-icp { margin-left: auto; color: rgba(154, 168, 204, 0.9); }

/* ---------- 12. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 90;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  background-image: linear-gradient(140deg, var(--violet), var(--magenta));
  cursor: pointer;
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s linear;
}

.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 13. 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0.35;
  transform: translateY(20px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

html.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1080px) {
  .hud-meta { display: none; }
  .hud-top-inner { gap: 14px; }
  .site-header .btn-cta { margin-left: auto; }
}

@media (max-width: 900px) {
  .hud-nav-inner {
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding-block: 9px;
  }

  .nav-toggle { display: inline-flex; order: 1; }

  .nav-index {
    order: 2;
    margin-left: auto;
    font-size: 11.5px;
  }

  .site-nav {
    order: 3;
    display: none;
    flex: 0 0 100%;
    width: 100%;
    padding-top: 8px;
    border-top: 1px dashed rgba(154, 168, 204, 0.22);
  }

  .site-nav[data-open] { display: block; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }

  .nav-list a {
    display: block;
    padding: 13px 6px;
    font-size: 15px;
    border-bottom: 1px solid rgba(154, 168, 204, 0.12);
  }

  .nav-list a::after { display: none; }

  .nav-list a[aria-current="page"] {
    padding-left: 15px;
    color: var(--cyan);
    background-color: rgba(43, 232, 213, 0.07);
    box-shadow: inset 3px 0 0 var(--cyan);
  }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-icp { margin-left: 0; }
}

@media (max-width: 620px) {
  body { background-size: 48px 48px; }

  .brand-desc { display: none; }

  .hud-top-inner { padding-block: 10px; }

  .site-header .btn-cta {
    padding: 9px 13px;
    font-size: 13px;
  }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .contact-line { font-size: 13.5px; }
}

@media (max-width: 380px) {
  .site-header .btn-cta { padding: 8px 10px; font-size: 12px; }
}

/* ---------- 15. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .to-top { transition: none; }
  .skip-link { transition: none; }
}