/* =========================================================
   电玩游艺会馆 · 共享样式  /assets/site.css
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 152px;
}

body, h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption, blockquote,
dl, dt, dd, fieldset, legend { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

a { color: inherit; text-decoration: none; }

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

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

:focus-visible {
  outline: 2px solid #B8FF3C;
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 2. 设计令牌 ---------- */
:root {
  --ink-900: #0B0A24;
  --ink-800: #161438;
  --ink-750: #1D1A45;
  --ink-600: #120C36;
  --card-back-a: #2A1758;
  --card-back-b: #120C36;

  --text: #F2EFFF;
  --text-dim: #A9A2D6;
  --line: #3A2E7A;
  --line-soft: rgba(169, 162, 214, .2);

  --magenta: #FF3E8F;
  --lime: #B8FF3C;
  --amber: #FFB627;
  --cyan: #35E6E0;

  --glass: rgba(244, 241, 255, .08);
  --glass-strong: rgba(244, 241, 255, .15);

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 14px;
  --radius-lg: 22px;
  --ease: cubic-bezier(.2, .7, .3, 1);

  --font-display: "Bungee", "Alibaba PuHuiTi 3.0 Heavy", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-12: 12px;
  --fs-14: 14px;
  --fs-17: 17px;
  --fs-22: 22px;
  --fs-28: 28px;
  --fs-36: 36px;
  --fs-52: 52px;
  --fs-72: 72px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(780px 520px at 6% -8%, rgba(255, 62, 143, .18), transparent 62%),
    radial-gradient(700px 500px at 96% -2%, rgba(53, 230, 224, .13), transparent 60%),
    radial-gradient(960px 640px at 50% 114%, rgba(184, 255, 60, .08), transparent 66%);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-17);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-body);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: .01em;
}

p { max-width: 68ch; }

::selection {
  background: var(--magenta);
  color: #0B0A24;
}

/* ---------- 4. 通用工具 ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 10px;
  z-index: 300;
  transform: translate(-50%, -190%);
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--lime);
  color: var(--ink-900);
  font-size: var(--fs-14);
  font-weight: 800;
  letter-spacing: .04em;
  transition: transform .2s var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(32px, 4vw, 56px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--amber);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: linear-gradient(90deg, var(--magenta), var(--amber));
}

.lede {
  font-size: var(--fs-22);
  line-height: 1.6;
  color: var(--text);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

/* ---------- 5. 网格与面板 ---------- */
.grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--split-rev { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }

.panel {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 32px);
}

.panel--glass {
  background: var(--glass);
  border-color: var(--glass-strong);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: var(--fs-14);
  font-weight: 800;
  letter-spacing: .04em;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color .2s var(--ease),
              color .2s var(--ease),
              border-color .2s var(--ease),
              box-shadow .2s var(--ease);
}

.btn--primary {
  background: var(--magenta);
  border-color: var(--magenta);
  color: #0B0A24;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: #FF63A4;
  border-color: #FF63A4;
  box-shadow: 0 0 0 4px rgba(255, 62, 143, .22), 0 10px 26px rgba(255, 62, 143, .3);
}

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  box-shadow: 0 0 0 4px rgba(184, 255, 60, .14);
}

.btn--lime {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
}

.btn--lime:hover,
.btn--lime:focus-visible {
  box-shadow: 0 0 0 4px rgba(184, 255, 60, .24), 0 10px 26px rgba(184, 255, 60, .26);
}

.btn--sm {
  padding: 8px 15px;
  font-size: var(--fs-12);
}

/* ---------- 7. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--text-dim);
  background: rgba(244, 241, 255, .05);
}

.tag--magenta { color: var(--magenta); }
.tag--lime { color: var(--lime); }
.tag--amber { color: var(--amber); }
.tag--cyan { color: var(--cyan); }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb {
  padding-top: clamp(20px, 3vw, 34px);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

.breadcrumb__link {
  color: var(--text-dim);
  transition: color .18s var(--ease);
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--lime);
}

/* ---------- 9. 翻面卡 ---------- */
.flip-card {
  position: relative;
  perspective: 1200px;
}

.flip-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform .5s var(--ease);
}

.flip-card:hover .flip-card__inner,
.flip-card:focus-within .flip-card__inner,
.flip-card:has(:checked) .flip-card__inner {
  transform: rotateY(180deg);
}

.flip-card__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 26px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
}

.flip-card__face--front {
  background: linear-gradient(155deg, rgba(255, 62, 143, .92), rgba(255, 182, 39, .78));
  color: #0B0A24;
  border-color: transparent;
}

.flip-card__face--back {
  background: linear-gradient(155deg, var(--card-back-a), var(--card-back-b));
  border-color: var(--line);
  transform: rotateY(180deg);
}

/* ---------- 10. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(150deg, var(--ink-800), var(--ink-600));
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(169, 162, 214, .12) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(0deg, rgba(169, 162, 214, .1) 0 1px, transparent 1px 44px);
}

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

.media-frame__tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(11, 10, 36, .78);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--lime);
}

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

/* ---------- 11. 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .26s var(--ease), transform .26s var(--ease);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* =========================================================
   12. 页头
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  isolation: isolate;
  background: linear-gradient(180deg, rgba(11, 10, 36, .96), rgba(11, 10, 36, .88));
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid var(--line);
}

.site-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--magenta), var(--amber) 42%, var(--lime) 76%, var(--cyan));
  pointer-events: none;
}

/* 刊头 */
.masthead {
  position: relative;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 20px var(--gutter) 14px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(12px, 2.4vw, 36px);
  transition: padding .26s var(--ease);
}

.site-header[data-scrolled] .masthead {
  padding-block: 10px 8px;
}

.site-header[data-scrolled] .masthead__brand-mark {
  font-size: clamp(17px, 2.2vw, 23px);
  text-shadow: 0 0 16px rgba(255, 62, 143, .4);
}

.masthead__tick {
  position: relative;
  height: 14px;
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1.5px, transparent 1.5px 13px);
  background-size: auto 8px;
  background-repeat: repeat-x;
}

.masthead__tick::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px 0;
  height: 2px;
  opacity: .9;
}

.masthead__tick--start::after {
  background: linear-gradient(90deg, rgba(255, 62, 143, 0), var(--magenta));
}

.masthead__tick--end::after {
  background: linear-gradient(90deg, var(--cyan), rgba(53, 230, 224, 0));
}

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding-inline: 8px;
  text-align: center;
}

.masthead__brand-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3.4vw, 34px);
  line-height: 1;
  letter-spacing: .06em;
  color: var(--text);
  text-shadow:
    0 0 20px rgba(255, 62, 143, .48),
    0 0 46px rgba(53, 230, 224, .24);
  transition: font-size .26s var(--ease), text-shadow .26s var(--ease);
}

.masthead__brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .38em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(244, 241, 255, .06);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--lime);
  background: rgba(184, 255, 60, .1);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 22px;
  height: 16px;
}

.nav-toggle__bars > span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform .24s var(--ease), opacity .18s var(--ease), background-color .2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span { background: var(--lime); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 目录带 */
.catalog-band {
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(
    90deg,
    rgba(255, 62, 143, .08),
    rgba(53, 230, 224, .05) 48%,
    rgba(184, 255, 60, .08)
  );
}

.site-nav {
  max-width: var(--shell);
  margin-inline: auto;
  padding: 6px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 56px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1.7vw, 24px);
  flex-wrap: wrap;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 4px;
  font-size: var(--fs-17);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text-dim);
  transition: color .2s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: 50% 50%;
  transition: transform .22s var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--text); }

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] { color: var(--text); }

.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.site-nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* =========================================================
   13. 页脚
   ========================================================= */
.site-footer {
  margin-top: clamp(72px, 9vw, 140px);
  border-top: 1px solid var(--line);
  background-color: var(--ink-600);
  background-image:
    radial-gradient(720px 320px at 10% 0%, rgba(255, 62, 143, .14), transparent 62%),
    radial-gradient(620px 300px at 92% 8%, rgba(53, 230, 224, .1), transparent 64%);
  background-repeat: no-repeat;
  color: var(--text);
}

.footer__inner {
  padding-block: clamp(44px, 6vw, 78px) 30px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, minmax(0, 1fr));
  gap: clamp(26px, 4vw, 52px);
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line-soft);
}

.footer__brand-mark {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 900;
  letter-spacing: .06em;
  line-height: 1.1;
  color: var(--text);
  text-shadow: 0 0 18px rgba(255, 62, 143, .4);
}

.footer__brand-note {
  margin-top: 12px;
  max-width: 34ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-dim);
}

.footer__col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 400;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--amber);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer__link {
  display: inline-block;
  font-size: var(--fs-14);
  color: var(--text-dim);
  transition: color .18s var(--ease), transform .18s var(--ease);
}

.footer__link:hover,
.footer__link:focus-visible {
  color: var(--lime);
  transform: translateX(3px);
}

.footer__contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 26px;
  border-bottom: 1px solid var(--line-soft);
}

.footer__contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  max-width: none;
}

.footer__kv {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-variant-numeric: tabular-nums;
}

.footer__k {
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--cyan);
}

.footer__v { color: var(--text); }

.footer__copy[data-copied] {
  border-color: var(--lime);
  color: var(--lime);
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 22px;
}

.footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--text-dim);
  max-width: none;
}

.footer__meta--links .footer__link { font-size: var(--fs-12); }

/* =========================================================
   14. 响应式
   ========================================================= */
@media (max-width: 1080px) {
  .footer__grid { grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); }
  .site-nav__link { font-size: var(--fs-14); }
}

@media (max-width: 960px) {
  html { scroll-padding-top: 116px; }

  .masthead {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    padding: 12px var(--gutter);
  }

  .masthead__tick { display: none; }

  .masthead__brand {
    align-items: flex-start;
    text-align: left;
    padding-inline: 0;
  }

  .masthead__brand-mark { font-size: clamp(18px, 5.4vw, 24px); }

  .site-header[data-scrolled] .masthead__brand-mark { font-size: clamp(16px, 4.6vw, 20px); }

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

  .catalog-band {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    border-top: 1px solid var(--line);
    background: none;
  }

  .site-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    min-height: 0;
    padding: 0 var(--gutter);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    background: var(--ink-800);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 28px 56px rgba(0, 0, 0, .55);
    transition: max-height .3s var(--ease), opacity .2s linear, visibility .3s;
  }

  .site-nav[data-open] {
    max-height: min(78vh, 560px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    padding-bottom: 20px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    flex-wrap: nowrap;
  }

  .site-nav__item { border-bottom: 1px solid var(--line-soft); }

  .site-nav__link {
    display: block;
    padding: 15px 2px;
    font-size: var(--fs-22);
  }

  .site-nav__link::after {
    bottom: 9px;
    height: 3px;
    transform-origin: 0 50%;
  }

  .site-nav__link[aria-current="page"] { color: var(--lime); }

  .site-nav__actions {
    flex-direction: column;
    align-items: stretch;
    margin-top: 18px;
  }

  .site-nav__actions .btn {
    width: 100%;
    padding-block: 13px;
    font-size: var(--fs-14);
  }

  .grid--split,
  .grid--split-rev,
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

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

  .footer__brand { grid-column: 1 / -1; }

  .footer__contact { flex-direction: column; align-items: flex-start; }

  .footer__contact-line { flex-direction: column; gap: 8px; }
}

@media (max-width: 560px) {
  .footer__grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .footer__legal { flex-direction: column; align-items: flex-start; }
  .lede { font-size: var(--fs-17); }
}

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

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .flip-card__inner { transform-style: flat; }

  .flip-card:hover .flip-card__inner,
  .flip-card:focus-within .flip-card__inner,
  .flip-card:has(:checked) .flip-card__inner { transform: none; }

  .flip-card:hover .flip-card__face--front,
  .flip-card:focus-within .flip-card__face--front,
  .flip-card:has(:checked) .flip-card__face--front { opacity: 0; }

  .flip-card:hover .flip-card__face--back,
  .flip-card:focus-within .flip-card__face--back,
  .flip-card:has(:checked) .flip-card__face--back {
    transform: none;
    opacity: 1;
  }
}