/* ==========================================================================
   博亚娱乐 · 共享站点样式 /assets/site.css
   夜航仪表盘视觉：深墨蓝底、光速青航道、暖金抵达指令
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --ink: #061826;
  --ink-2: #0B2740;
  --panel: #03202E;
  --rail: #1E4A66;
  --cyan: #39E6FF;
  --cyan-soft: #8CF4FF;
  --gold: #F4B860;
  --gold-soft: #FFC978;
  --violet: #6E4F82;
  --paper: #E8F4FA;
  --steel: #9DB4C6;
  --steel-dim: #6B8AA1;

  --font-display: "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --max: 1360px;
  --gutter: clamp(1rem, 4vw, 3.25rem);
  --ease: cubic-bezier(.22, .8, .3, 1);
  --header-h: 76px;
}

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

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

body {
  margin: 0;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background:
    radial-gradient(90% 55% at 100% 0%, rgba(30, 74, 102, .38), transparent 62%),
    radial-gradient(70% 50% at 0% 100%, rgba(110, 79, 130, .20), transparent 66%),
    var(--ink);
  background-attachment: fixed;
}

img, svg, video { display: block; max-width: 100%; }
figure { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
hr { border: 0; }

/* ---------- 3. 中文排版 ---------- */
h1, h2, h3, h4, h5 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.16;
  color: var(--paper);
}
h1 { font-size: clamp(2rem, 5.2vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.25rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.45rem); }
h4 { font-size: 1.06rem; }

.lede {
  font-size: clamp(1.02rem, 1.4vw, 1.16rem);
  line-height: 1.85;
  color: #C3D7E4;
  max-width: 68ch;
}

strong, b { font-weight: 800; color: var(--paper); }

/* ---------- 4. 无障碍与焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -5rem;
  z-index: 400;
  padding: .6rem 1.1rem;
  background: var(--gold);
  color: var(--ink);
  font-weight: 800;
  font-size: .9rem;
  text-decoration: none;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: .75rem; color: var(--ink); }

#main-content { scroll-margin-top: calc(var(--header-h) + 16px); }

/* ---------- 5. 链接 ---------- */
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--cyan-soft); }

/* ---------- 6. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }

.grid { display: grid; gap: clamp(1rem, 2.5vw, 2rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym {
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.75rem);
}

.rule {
  height: 1px;
  background: linear-gradient(90deg, var(--rail), rgba(30, 74, 102, .1) 70%, transparent);
}

/* ---------- 7. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(6, 24, 38, .98), rgba(6, 24, 38, .90));
  border-bottom: 1px solid var(--rail);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg,
    var(--cyan) 0%,
    rgba(57, 230, 255, .30) 26%,
    rgba(57, 230, 255, 0) 58%,
    rgba(244, 184, 96, .70) 100%);
  pointer-events: none;
}

.site-header__bar {
  position: relative;
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(.75rem, 2vw, 2rem);
  min-height: var(--header-h);
  padding: .7rem var(--gutter);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  flex: 0 0 auto;
  min-width: 0;
}

.brand-beacon {
  position: relative;
  flex: 0 0 auto;
  width: 3px;
  height: 36px;
  background: linear-gradient(180deg, rgba(57, 230, 255, 0) 0%, var(--cyan) 45%, rgba(57, 230, 255, 0) 100%);
}
.brand-beacon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 7px;
  height: 7px;
  margin: -3.5px 0 0 -3.5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(57, 230, 255, .9);
  animation: beacon-pulse 2.8s var(--ease) infinite;
}
@keyframes beacon-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(57, 230, 255, .55), 0 0 10px rgba(57, 230, 255, .9); }
  70%  { box-shadow: 0 0 0 11px rgba(57, 230, 255, 0), 0 0 10px rgba(57, 230, 255, .9); }
  100% { box-shadow: 0 0 0 0 rgba(57, 230, 255, 0), 0 0 10px rgba(57, 230, 255, .9); }
}

.site-brand {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  line-height: 1;
  text-decoration: none;
}
.site-brand__mark {
  font-family: var(--font-display);
  font-size: 1.26rem;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--paper);
  transition: color .2s var(--ease);
}
.site-brand__tag {
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .40em;
  color: var(--gold);
}
.site-brand:hover .site-brand__mark { color: var(--cyan-soft); }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: .55rem;
  padding: .55rem .85rem;
  background: transparent;
  border: 1px solid var(--rail);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .16em;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform .26s var(--ease), opacity .2s var(--ease);
}
.site-header[data-open] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__text { white-space: nowrap; }

/* 导航主体 */
.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(.8rem, 2.2vw, 2.2rem);
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: .1rem;
}
.site-nav__link {
  position: relative;
  display: block;
  padding: .5rem .72rem;
  color: var(--steel);
  font-size: .92rem;
  font-weight: 600;
  letter-spacing: .02em;
  text-decoration: none;
  transition: color .18s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: .72rem;
  right: .72rem;
  bottom: .12rem;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .28s var(--ease), background .2s var(--ease);
}
.site-nav__link:hover { color: var(--paper); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--cyan); }
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold);
  box-shadow: 0 0 12px rgba(244, 184, 96, .7);
}

.site-nav__utility {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding-left: clamp(.5rem, 1.4vw, 1.25rem);
  border-left: 1px solid var(--rail);
}
.site-nav__cta {
  display: inline-block;
  padding: .55rem .95rem;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: .87rem;
  font-weight: 800;
  letter-spacing: .02em;
  text-decoration: none;
  box-shadow: 0 0 0 1px rgba(244, 184, 96, .35);
  transition: transform .2s var(--ease), box-shadow .25s var(--ease), background .2s var(--ease);
}
.site-nav__cta:hover {
  color: var(--ink);
  background: var(--gold-soft);
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(244, 184, 96, .7), 0 12px 26px -14px rgba(244, 184, 96, .95);
}
.site-nav__tool {
  color: var(--steel);
  font-size: .85rem;
  padding: .45rem .15rem;
  border-bottom: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.site-nav__tool:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .85rem 1.5rem;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 800;
  letter-spacing: .04em;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .25s var(--ease),
              background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.btn--gold {
  background: var(--gold);
  color: var(--ink);
  box-shadow: 0 0 0 1px rgba(244, 184, 96, .35);
}
.btn--gold:hover {
  color: var(--ink);
  background: var(--gold-soft);
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(244, 184, 96, .7), 0 16px 34px -18px rgba(244, 184, 96, .95);
}
.btn--ghost {
  background: transparent;
  color: var(--cyan);
  border-color: var(--rail);
}
.btn--ghost:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  box-shadow: 0 0 34px -10px rgba(57, 230, 255, .9);
}
.btn--quiet {
  background: transparent;
  border-color: transparent;
  color: var(--paper);
  padding-inline: .2rem;
}
.btn--quiet:hover { color: var(--cyan); }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb { padding-top: 1.5rem; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--steel-dim);
}
.breadcrumb__item { display: flex; align-items: center; gap: .45rem; }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--rail);
}
.breadcrumb__link { color: var(--steel); text-decoration: none; transition: color .2s var(--ease); }
.breadcrumb__link:hover { color: var(--cyan); }
.breadcrumb__current { color: var(--paper); font-weight: 600; }

/* ---------- 10. 内容组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .3em;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--cyan);
}

.index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--gold);
}

.tag {
  display: inline-block;
  padding: .22rem .58rem;
  border: 1px solid var(--rail);
  background: rgba(30, 74, 102, .18);
  color: var(--steel);
  font-size: .72rem;
  letter-spacing: .12em;
}

.panel {
  position: relative;
  padding: clamp(1.25rem, 2.5vw, 2rem);
  background: linear-gradient(160deg, var(--ink-2), var(--panel));
  border: 1px solid var(--rail);
}
.panel::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 2px;
  height: 38px;
  background: linear-gradient(180deg, var(--cyan), rgba(57, 230, 255, 0));
}

/* ---------- 11. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(150deg, var(--ink-2), var(--panel));
  border: 1px solid var(--rail);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(160deg, rgba(57, 230, 255, .16), rgba(57, 230, 255, 0) 46%, rgba(244, 184, 96, .10)),
    repeating-linear-gradient(90deg, rgba(30, 74, 102, .35) 0 1px, transparent 1px 96px);
  opacity: .8;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--band { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  margin-top: .7rem;
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--steel-dim);
}

/* ---------- 12. 滚动进度（脚本注入） ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  z-index: 300;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

/* ---------- 13. 进入视口显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(4rem, 8vw, 8rem);
  overflow: hidden;
  color: var(--steel);
  border-top: 1px solid rgba(30, 74, 102, .55);
  background:
    radial-gradient(120% 150% at 88% 0%, rgba(110, 79, 130, .30), transparent 58%),
    linear-gradient(180deg, #04131F 0%, #02101A 58%, #010B12 100%);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    var(--cyan) 0%,
    rgba(57, 230, 255, .30) 32%,
    rgba(244, 184, 96, .80) 72%,
    rgba(244, 184, 96, 0) 100%);
}

.site-footer__inner {
  max-width: var(--max);
  margin-inline: auto;
  padding: clamp(2.5rem, 5vw, 4.5rem) var(--gutter) clamp(1.75rem, 3.5vw, 3rem);
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, .7fr) minmax(0, .7fr) minmax(0, 1.05fr);
  gap: clamp(1.5rem, 3vw, 3rem);
}

.site-footer__brandline {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-size: 1.16rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}
.site-footer__blurb {
  margin: 0 0 1.1rem;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--steel);
  max-width: 34ch;
}
.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.4rem;
}
.site-footer__legal-link {
  position: relative;
  color: var(--steel-dim);
  font-size: .8rem;
  letter-spacing: .06em;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(30, 74, 102, .7);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.site-footer__legal-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.site-footer__title {
  margin: 0 0 1.1rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .28em;
  color: var(--cyan);
}
.site-footer__links { display: flex; flex-direction: column; gap: .65rem; }
.site-footer__link {
  display: inline-block;
  color: var(--steel);
  font-size: .9rem;
  text-decoration: none;
  transition: color .2s var(--ease);
}
.site-footer__link::before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 0;
  height: 1px;
  margin-right: 0;
  background: var(--gold);
  transition: width .22s var(--ease), margin-right .22s var(--ease);
}
.site-footer__link:hover { color: var(--paper); }
.site-footer__link:hover::before { width: 14px; margin-right: .5rem; }

.site-footer__data {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .6rem .9rem;
  margin: 0;
  font-size: .84rem;
  line-height: 1.65;
}
.site-footer__data dt {
  color: var(--steel-dim);
  font-weight: 600;
  white-space: nowrap;
}
.site-footer__data dd {
  margin: 0;
  color: var(--steel);
  overflow-wrap: anywhere;
}

.site-footer__bottom {
  position: relative;
  max-width: var(--max);
  margin-inline: auto;
  padding: 1.2rem var(--gutter) 2.2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  border-top: 1px solid rgba(30, 74, 102, .6);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--steel-dim);
}
.site-footer__copy { margin: 0; }
.site-footer__icp { margin: 0; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1180px) {
  .site-nav { gap: 1rem; }
  .site-nav__link { padding-inline: .58rem; font-size: .88rem; }
}

@media (max-width: 1080px) {
  .site-header__bar {
    flex-wrap: wrap;
    row-gap: .5rem;
    min-height: 64px;
  }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: .5rem 0 1rem;
    border-top: 1px solid var(--rail);
  }
  .site-header[data-open] .site-nav { display: flex; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__link {
    padding: .85rem .2rem;
    font-size: 1rem;
    border-bottom: 1px solid rgba(30, 74, 102, .55);
  }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] { color: var(--gold); }

  .site-nav__utility {
    flex-direction: column;
    align-items: stretch;
    gap: .75rem;
    margin-top: 1rem;
    padding-left: 0;
    border-left: 0;
  }
  .site-nav__cta { text-align: center; padding: .85rem 1rem; }
  .site-nav__tool {
    text-align: center;
    padding: .7rem .2rem;
    border: 1px solid var(--rail);
  }
  .site-nav__tool:hover { border-bottom-color: var(--cyan); }
}

@media (max-width: 900px) {
  .site-footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
  }
  .site-footer__brand { grid-column: 1 / -1; }
  .grid--asym { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  body { background-attachment: scroll; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 560px) {
  .site-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }
  .site-brand__mark { font-size: 1.14rem; }
  .site-brand__tag { letter-spacing: .3em; }
  .grid--asym { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 16. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}