/* =========================================================
   英亚平台官方中文站 · /assets/site.css
   共享外壳：技术蓝图网格 + 深海蓝分区 + 霓虹青 / 暖金状态色
   ========================================================= */

/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
table { border-collapse: collapse; width: 100%; }
summary { display: block; }

/* ---------- 2. tokens ---------- */
:root {
  --abyss: #061A2B;
  --abyss-deep: #04121F;
  --archive: #0A2540;
  --glass: #0B3A45;
  --indigo: #243B6B;
  --wine: #6E1F3A;
  --cyan: #2DE2E6;
  --cyan-dim: rgba(45, 226, 230, .35);
  --gold: #F2B84B;
  --paper: #F3F7F9;
  --mist: #A8BFC9;
  --ok: #3DDC97;
  --warn: #FFB86B;
  --err: #FF6B6B;

  --line: rgba(168, 191, 201, .16);
  --line-soft: rgba(168, 191, 201, .10);
  --line-strong: rgba(45, 226, 230, .34);
  --grid-line: rgba(36, 59, 107, .55);

  --font-head: "Barlow Condensed", "Oswald", "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --wrap: 1280px;
  --pad: clamp(16px, 4vw, 40px);
  --gap: 8px;
  --r-sm: 4px;
  --r-md: 10px;
  --r-lg: 18px;
}

/* ---------- 3. 基础排版与蓝图底 ---------- */
body {
  background-color: var(--abyss);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px;
  background-position: -1px -1px, -1px -1px;
  color: #DCE7EC;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: .01em;
  color: var(--paper);
}
h1 { font-size: clamp(34px, 5vw, 56px); }
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 26px); }
h4 { font-size: 18px; }
p { line-height: 1.8; }
strong { color: var(--paper); font-weight: 600; }
::selection { background: var(--cyan); color: #04222A; }

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* ---------- 4. 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}
.grid { display: grid; gap: clamp(14px, 1.8vw, 26px); }
.grid--12 {
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 1.8vw, 26px);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.section { padding-block: clamp(36px, 6vw, 76px); }
.section--tight { padding-block: clamp(22px, 3.4vw, 44px); }
.stack > * + * { margin-top: 14px; }

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--cyan-dim), rgba(168, 191, 201, .08) 60%, transparent);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}
.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

/* ---------- 5. 面板与状态 ---------- */
.panel {
  position: relative;
  background: linear-gradient(180deg, rgba(10, 37, 64, .92), rgba(6, 26, 43, .94));
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: clamp(18px, 2.4vw, 28px);
}
.panel--glass {
  background: rgba(11, 58, 69, .42);
  border-color: var(--line-strong);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.panel--solid {
  background: var(--paper);
  border-color: transparent;
  color: #12303F;
}
.panel--solid h1, .panel--solid h2, .panel--solid h3, .panel--solid h4 { color: var(--abyss); }
.panel--wine {
  background: linear-gradient(135deg, var(--wine), #40122A 72%);
  border-color: rgba(242, 184, 75, .3);
}

.dot {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--mist);
  flex: none;
}
.dot--live {
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(61, 220, 151, .55);
  animation: dot-pulse 2.6s ease-out infinite;
}
@keyframes dot-pulse {
  0% { box-shadow: 0 0 0 0 rgba(61, 220, 151, .55); }
  70% { box-shadow: 0 0 0 8px rgba(61, 220, 151, 0); }
  100% { box-shadow: 0 0 0 0 rgba(61, 220, 151, 0); }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(11, 58, 69, .5);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mist);
}
.badge--ok { color: var(--ok); border-color: rgba(61, 220, 151, .42); }
.badge--warn { color: var(--warn); border-color: rgba(255, 184, 107, .42); }
.badge--gold { color: var(--gold); border-color: rgba(242, 184, 75, .45); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .02em;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}
.btn--cyan { background: var(--cyan); color: #04222A; border-color: var(--cyan); }
.btn--cyan:hover { background: #7BF3F5; }
.btn--gold { background: var(--gold); color: #2A1B00; border-color: var(--gold); }
.btn--gold:hover { background: #FFCF74; }
.btn--ghost {
  background: rgba(45, 226, 230, .06);
  border-color: var(--line-strong);
  color: var(--paper);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn--outline { background: transparent; border-color: var(--line); color: var(--mist); }
.btn--outline:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- 7. skip link ---------- */
.skip-link {
  position: fixed;
  left: 12px;
  top: -120px;
  z-index: 140;
  padding: 11px 18px;
  border-radius: var(--r-sm);
  background: var(--cyan);
  color: #04222A;
  font-weight: 700;
  font-size: 15px;
  transition: top .18s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- 8. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(6, 26, 43, .98), rgba(6, 26, 43, .88));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow .25s ease, border-color .25s ease;
}
.site-header[data-scrolled="true"] {
  border-bottom-color: var(--line-strong);
  box-shadow: 0 18px 44px rgba(2, 10, 18, .6);
}

/* 控制台导轨 */
.hdr-rail {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 7px var(--pad);
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 11.5px;
  color: var(--mist);
}
.hdr-rail__coord {
  color: rgba(168, 191, 201, .5);
  white-space: nowrap;
}
.hdr-rail__status {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ok);
  white-space: nowrap;
}
.version-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border: 1px solid rgba(242, 184, 75, .42);
  border-radius: 999px;
  color: var(--gold);
  font-size: 11px;
  letter-spacing: .1em;
  white-space: nowrap;
  transition: background-color .18s ease;
}
.version-chip:hover { background: rgba(242, 184, 75, .14); }

.hdr-quick {
  display: flex;
  align-items: center;
  gap: 16px;
}
.hdr-quick__link {
  color: var(--mist);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  white-space: nowrap;
  transition: color .18s ease, border-color .18s ease;
}
.hdr-quick__link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.hdr-quick__link--gold { color: var(--gold); }
.hdr-quick__link--gold:hover { color: var(--gold); border-bottom-color: var(--gold); }

/* 品牌与栏目两分置 */
.hdr-main {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 10px var(--pad) 12px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  min-width: 0;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: linear-gradient(140deg, rgba(45, 226, 230, .16), rgba(11, 58, 69, .62));
  color: var(--cyan);
  font-size: 14px;
}
.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.15;
  color: var(--paper);
}
.brand__tagline {
  font-size: 12px;
  line-height: 1.4;
  color: var(--mist);
  letter-spacing: .04em;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: rgba(45, 226, 230, .06);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  cursor: pointer;
}
.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: var(--cyan);
  transition: transform .2s ease, opacity .2s ease;
}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* 主导航 */
.site-nav { display: flex; align-items: center; }
.site-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 20px;
}
.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--mist);
  white-space: nowrap;
  transition: color .18s ease;
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .22s ease;
}
.site-nav__link:hover { color: var(--paper); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--paper); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); background: var(--gold); }

/* ---------- 9. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(40px, 7vw, 96px);
  padding-top: clamp(32px, 5vw, 64px);
  background: linear-gradient(180deg, var(--archive), var(--abyss-deep));
  border-top: 1px solid var(--line);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.6fr;
  gap: clamp(22px, 3vw, 46px);
  padding-bottom: clamp(26px, 4vw, 48px);
}
.footer-brand__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 22px;
  color: var(--paper);
}
.footer-brand__tag { margin-top: 6px; font-size: 14px; color: var(--mist); }
.footer-brand__meta {
  margin-top: 14px;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: rgba(168, 191, 201, .6);
}
.footer-col__head {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--cyan);
}
.footer-col__list { display: grid; gap: 9px; }
.footer-col__link {
  font-size: 14.5px;
  color: var(--mist);
  transition: color .18s ease;
}
.footer-col__link:hover { color: var(--cyan); }

.footer-contact__list { display: grid; gap: 10px; }
.footer-contact__item {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
}
.footer-contact__k {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: rgba(168, 191, 201, .6);
}
.footer-contact__v { color: var(--paper); word-break: break-word; }
.footer-contact__note {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}
.footer-contact__cta { margin-top: 16px; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 22px;
  padding-block: 18px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: rgba(168, 191, 201, .7);
}
.footer-legal__links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.footer-legal__links a { color: var(--mist); transition: color .18s ease; }
.footer-legal__links a:hover { color: var(--cyan); }

/* 固定悬浮咨询锚点 */
.sticky-contact {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: linear-gradient(140deg, rgba(45, 226, 230, .18), rgba(11, 58, 69, .94));
  color: var(--paper);
  font-size: 14px;
  letter-spacing: .04em;
  box-shadow: 0 14px 34px rgba(2, 10, 18, .55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform .18s ease, border-color .18s ease, color .18s ease;
}
.sticky-contact:hover { transform: translateY(-2px); border-color: var(--cyan); color: var(--cyan); }
.sticky-contact__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 10px rgba(61, 220, 151, .8);
  flex: none;
}

/* ---------- 10. 面包屑 / 正文 / 折叠 / 图片容器 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--mist);
}
.breadcrumbs a { color: var(--mist); transition: color .18s ease; }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs__sep { color: var(--indigo); }
.breadcrumbs__current { color: var(--paper); }

.prose { max-width: 72ch; font-size: 17px; line-height: 1.85; color: #D6E3E9; }
.prose > * + * { margin-top: 1.05em; }
.prose h2, .prose h3 { margin-top: 1.6em; }
.prose ul, .prose ol { display: grid; gap: .5em; }
.prose li { position: relative; padding-left: 22px; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0; top: .78em;
  width: 10px; height: 1px;
  background: var(--cyan);
}
.prose a { color: var(--cyan); border-bottom: 1px solid var(--cyan-dim); }
.prose a:hover { border-bottom-color: var(--cyan); }
.prose code {
  font-family: var(--font-mono);
  font-size: .88em;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(11, 58, 69, .5);
  color: var(--cyan);
}

.accordion {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(10, 37, 64, .55);
  overflow: hidden;
}
.accordion + .accordion { margin-top: 10px; }
.accordion__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  font-weight: 600;
  color: var(--paper);
  transition: background-color .18s ease;
}
.accordion__summary::-webkit-details-marker { display: none; }
.accordion__summary:hover { background: rgba(45, 226, 230, .06); }
.accordion__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 18px;
  line-height: 1;
}
.accordion[open] > .accordion__summary::after { content: "–"; color: var(--gold); }
.accordion[open] > .accordion__summary { border-bottom: 1px solid var(--line); }
.accordion__body { padding: 16px 18px 18px; color: var(--mist); font-size: 15.5px; }

.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--archive), var(--glass));
  aspect-ratio: 16 / 9;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--portrait { aspect-ratio: 3 / 4; }
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 26, 43, 0) 42%, rgba(6, 26, 43, .62));
  pointer-events: none;
}
.media-frame__caption {
  position: absolute;
  z-index: 1;
  left: 14px; right: 14px; bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--paper);
}

/* ---------- 11. 滚动进度与显现 ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  width: 0;
  height: 2px;
  z-index: 90;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  pointer-events: none;
}
html.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity .55s cubic-bezier(.2, .7, .3, 1) var(--reveal-delay, 0ms),
    transform .55s cubic-bezier(.2, .7, .3, 1) var(--reveal-delay, 0ms);
}
html.has-js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1040px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    flex-basis: 100%;
    width: 100%;
    padding: 6px 0 4px;
    border-top: 1px solid var(--line);
  }
  .site-header[data-open="true"] .site-nav { display: block; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav__item { border-bottom: 1px dashed var(--line-soft); }
  .site-nav__item:last-child { border-bottom: 0; }
  .site-nav__link { display: block; padding: 13px 6px; font-size: 16px; }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] {
    color: var(--cyan);
    box-shadow: inset 2px 0 0 var(--gold);
    padding-left: 14px;
  }
}

@media (max-width: 1024px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  [class*="col-"] { grid-column: span 6; }
  .col-12 { grid-column: span 6; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .hdr-rail__coord { display: none; }
  .hdr-rail__status { margin-left: 0; }
}

@media (max-width: 860px) {
  .hdr-rail {
    gap: 12px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .hdr-rail::-webkit-scrollbar { display: none; }
  .hdr-quick { margin-left: auto; }
  .brand__name { font-size: 17px; }
  .brand__tagline { font-size: 11.5px; }
}

@media (max-width: 640px) {
  body {
    background-size: 64px 64px, 64px 64px;
    font-size: 16px;
  }
  .grid--12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  [class*="col-"] { grid-column: span 2; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-contact__item { grid-template-columns: 48px 1fr; }
  .footer-legal { justify-content: flex-start; }
  .sticky-contact {
    left: 14px;
    right: 14px;
    bottom: 12px;
    justify-content: center;
    padding: 13px 16px;
  }
  .brand__tagline { display: none; }
}

/* ---------- 13. 无障碍动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.has-js [data-reveal] { opacity: 1; transform: none; }
}