/* =========================================================
   爱游戏赛场 — 共享样式表 /assets/site.css
   夜场指挥台：深墨绿底 · 荧光青信息层 · 信号橙行动点
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root {
  --ink-950: #061A16;
  --ink-800: #0B2A23;
  --ink-700: #123F34;
  --cyan: #2BF5C8;
  --cyan-soft: #9FF7E2;
  --signal: #FF6A1F;
  --signal-deep: #C64A0F;
  --text: #E6F2EE;
  --muted: #7E9A92;
  --paper: #F3F0E6;
  --on-signal: #081A15;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --line: rgba(43, 245, 200, 0.2);
  --line-soft: rgba(159, 247, 226, 0.12);
  --line-strong: rgba(43, 245, 200, 0.5);

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur: 200ms;
  --shell: 1280px;
  --gutter: clamp(16px, 4vw, 44px);
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 132px;
  background-color: var(--ink-950);
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink-950);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, pre { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
  border-radius: 1px;
}

/* ---------- 3. 骨架与排版 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(48px, 8vw, 104px);
}

.section--band {
  background-color: var(--ink-800);
}

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.rule {
  display: block;
  height: 1px;
  background-color: var(--line);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 16px;
  height: 2px;
  background-color: var(--signal);
}

.index-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(56px, 11vw, 160px);
  font-weight: 200;
  line-height: 0.8;
  letter-spacing: -0.05em;
  color: var(--ink-700);
  -webkit-text-stroke: 1px rgba(43, 245, 200, 0.42);
  user-select: none;
}

.h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.2vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.025em;
}

.h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.6vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 23px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.lede {
  max-width: 42ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

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

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  background-color: rgba(43, 245, 200, 0.06);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.tag--signal {
  border-color: rgba(255, 106, 31, 0.42);
  background-color: rgba(255, 106, 31, 0.1);
  color: var(--signal);
}

/* ---------- 4. 通用网格 / 卡片 / 图例 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(175px, 1fr)); }

.card {
  position: relative;
  background-color: var(--ink-700);
  border: 1px solid var(--line);
  padding: clamp(18px, 2.4vw, 26px);
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 11px 14px;
  border: 1px dashed var(--line);
  background-color: rgba(11, 42, 35, 0.7);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.legend__swatch {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  background-color: var(--cyan);
}

.legend__swatch--signal { background-color: var(--signal); }
.legend__swatch--muted { background-color: var(--muted); }

/* ---------- 5. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  padding-block: 16px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.breadcrumbs a { color: var(--muted); transition: color var(--dur) var(--ease); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs__sep { color: rgba(43, 245, 200, 0.45); }
.breadcrumbs [aria-current="page"] { color: var(--text); }

/* ---------- 6. 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  background-color: var(--ink-700);
  background-image:
    linear-gradient(135deg, rgba(43, 245, 200, 0.16) 0%, rgba(6, 26, 22, 0.92) 62%),
    repeating-linear-gradient(90deg, rgba(43, 245, 200, 0.07) 0 1px, transparent 1px 22px);
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.06) brightness(0.86);
  transition: transform 320ms var(--ease), filter 320ms var(--ease);
}

.media:hover > img {
  transform: scale(1.03);
  filter: saturate(1) contrast(1.1) brightness(1);
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--portrait { aspect-ratio: 3 / 4; }

.media__tag {
  position: absolute;
  inset: 0 auto auto 0;
  padding: 6px 10px;
  background-color: var(--signal);
  color: var(--on-signal);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- 7. 页头 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  background-color: var(--signal);
  color: var(--on-signal);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--cyan-soft);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: rgba(6, 26, 22, 0.96);
  border-bottom: 1px solid var(--line);
  transition: box-shadow var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-header[data-scrolled] {
  background-color: rgba(6, 26, 22, 0.99);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.5);
}

.scroll-meter {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-image: linear-gradient(90deg, var(--cyan) 0%, var(--signal) 100%);
  will-change: transform;
}

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

.header-top {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 66px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-strong);
  background-color: var(--ink-800);
  background-image: linear-gradient(135deg, rgba(43, 245, 200, 0.22) 0 50%, transparent 50%);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  border-color: var(--cyan);
  color: var(--cyan-soft);
}

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

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text);
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.45;
  letter-spacing: 0.06em;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 行动点 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn--signal {
  background-color: var(--signal);
  border-color: var(--signal);
  color: var(--on-signal);
}

.btn--signal:hover {
  background-color: var(--signal-deep);
  border-color: var(--signal-deep);
  color: var(--paper);
}

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

.btn--ghost:hover {
  background-color: rgba(43, 245, 200, 0.12);
  border-color: var(--cyan);
  color: var(--cyan-soft);
}

/* 移动导航按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  background-color: transparent;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--line-strong);
  color: var(--cyan);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background-color: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child {
  transform: translateY(2.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

/* 导航 */
.header-nav {
  display: none;
  border-top: 1px solid var(--line);
}

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

.nav-list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.nav-list::-webkit-scrollbar { display: none; }

.nav-item { flex: 0 0 auto; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 12px 15px;
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--muted);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 7px;
  height: 1px;
  background-color: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-link:hover { color: var(--cyan-soft); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--cyan);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after {
  height: 2px;
  background-color: var(--signal);
  transform: scaleX(1);
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  background-color: var(--ink-800);
  border-top: 1px solid var(--line);
  color: var(--text);
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background-image: linear-gradient(90deg,
      var(--signal) 0, var(--signal) 140px,
      var(--cyan) 140px, var(--cyan) 100%);
  opacity: 0.9;
}

.footer-frame {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(38px, 6vw, 72px) var(--gutter) 26px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.06;
  letter-spacing: -0.022em;
  color: var(--text);
}

.footer-brand__note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 44px);
}

.footer-col__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  display: inline-block;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--cyan);
  transform: translateX(3px);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 18px 32px;
  margin-top: clamp(28px, 4vw, 48px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.footer-contact__item {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-contact__value {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
  word-break: break-word;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
}

.footer-base__legal {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}

.footer-base__copy {
  font-size: 12px;
  letter-spacing: 0.02em;
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: var(--gutter);
  bottom: 24px;
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  background-color: var(--ink-800);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              visibility var(--dur) linear;
}

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

.to-top:hover {
  background-color: var(--signal);
  border-color: var(--signal);
  color: var(--on-signal);
}

/* ---------- 9. 滚动显现 ---------- */
.js [data-section] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}

.js [data-section][data-inview] {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 899px) {
  .header-nav[data-open] {
    display: block;
    max-height: min(64vh, 420px);
    overflow-y: auto;
    padding-bottom: 10px;
    animation: nav-drop 200ms var(--ease) both;
  }

  @keyframes nav-drop {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    overflow-x: visible;
  }

  .nav-item { flex: 1 1 auto; }

  .nav-link {
    display: block;
    padding: 14px 4px;
    border-bottom: 1px solid var(--line-soft);
    font-size: 15px;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    padding-left: 14px;
    background-color: rgba(43, 245, 200, 0.06);
    box-shadow: inset 3px 0 0 var(--signal);
  }

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

@media (min-width: 900px) {
  .site-header { position: sticky; }
  .header-nav { display: block; }
  .nav-toggle { display: none; }
  .header-top { min-height: 70px; }
}

@media (max-width: 640px) {
  .brand__tagline { display: none; }
  .brand__mark { width: 34px; height: 34px; font-size: 11px; }
  .brand__name { font-size: 17px; }
  .btn { padding: 9px 13px; font-size: 12px; letter-spacing: 0.04em; }
  .nav-toggle { padding: 8px 11px; }
  .to-top { bottom: 16px; right: 16px; padding: 9px 12px; }
}

@media (max-width: 560px) {
  .header-actions .btn--ghost { display: none; }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .footer-base { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 1400px) {
  :root { --shell: 1340px; }
}

/* ---------- 11. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-section] {
    opacity: 1;
    transform: none;
  }

  .card:hover,
  .media:hover > img,
  .footer-links a:hover { transform: none; }
}