/* ============================================================
   8博体育站 · 全站共享样式 /assets/site.css
   深海蓝指挥台 + 青柠状态 + 炽热橙行动
   ============================================================ */

:root {
  --deep: #061A2E;
  --panel: #0B2748;
  --edge: #123A5E;
  --glow: #173B57;
  --lime: #C8FF3D;
  --orange: #FF7A1A;
  --gray: #8FA3B8;
  --mist: #F4F8FC;
  --silent: #A9B8C7;

  --rail-w: 248px;
  --pad: clamp(20px, 4vw, 64px);
  --radius: 14px;
  --ease: cubic-bezier(.22, .72, .28, 1);

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

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--mist);
  background-color: var(--deep);
  background-image:
    radial-gradient(1100px 620px at 104% -12%, rgba(23, 59, 87, .62), transparent 66%),
    radial-gradient(880px 520px at -8% 104%, rgba(255, 122, 26, .08), transparent 62%),
    repeating-linear-gradient(180deg, rgba(143, 163, 184, .045) 0 1px, transparent 1px 88px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

ul, ol { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: .01em;
}

h1 { font-size: clamp(2rem, 4.4vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.2rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.42rem); }

p { margin: 0; }

::selection { background: var(--lime); color: var(--deep); }

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 通用布局 ---------- */
.rail-offset { margin-left: var(--rail-w); }

.container {
  width: min(1180px, 100%);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.prose {
  max-width: 70ch;
  color: #D8E3EF;
  line-height: 1.85;
}

.prose p + p { margin-top: .9em; }

.prose a {
  color: var(--lime);
  border-bottom: 1px solid rgba(200, 255, 61, .45);
}

.prose strong { color: var(--mist); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--lime);
}

.kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--orange);
  border-radius: 2px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.28;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  grid-template-columns: repeat(var(--cols, 2), minmax(0, 1fr));
}

.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--wide { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }

.card {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(23, 59, 87, .88), rgba(11, 39, 72, .92));
}

.card:hover { border-color: rgba(200, 255, 61, .42); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid rgba(200, 255, 61, .32);
  border-radius: 999px;
  background: rgba(200, 255, 61, .1);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
}

.tag--warm {
  border-color: rgba(255, 122, 26, .38);
  background: rgba(255, 122, 26, .14);
  color: #FFB480;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .01em;
  transition: transform .2s var(--ease), background-color .2s var(--ease),
              border-color .2s var(--ease), color .2s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--lime); color: #07202F; }
.btn--primary:hover { background: #D8FF6B; }

.btn--warm { background: var(--orange); color: #0A1B2C; }
.btn--warm:hover { background: #FF9145; }

.btn--ghost {
  border-color: var(--edge);
  background: rgba(18, 58, 94, .35);
  color: var(--mist);
}

.btn--ghost:hover { border-color: var(--lime); color: var(--lime); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--silent);
}

.breadcrumb a { border-bottom: 1px solid transparent; }
.breadcrumb a:hover { color: var(--lime); border-bottom-color: rgba(200, 255, 61, .5); }

.breadcrumb__sep { color: var(--edge); }
.breadcrumb__current { color: var(--mist); }

/* ---------- 图片占位容器（页面阶段复用） ---------- */
.media-frame {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(200, 255, 61, .14), transparent 58%),
    radial-gradient(110% 100% at 8% 96%, rgba(255, 122, 26, .16), transparent 60%),
    linear-gradient(150deg, var(--glow), var(--panel) 60%, var(--deep));
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

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

/* ============================================================
   头部 / 左侧品牌轨道
   ============================================================ */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 999;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--lime);
  color: #07202F;
  font-size: .85rem;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

.site-header {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 80;
  width: var(--rail-w);
}

.rail {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 26px;
  height: 100%;
  padding: 26px 18px 24px;
  overflow-y: auto;
  border-right: 1px solid var(--edge);
  background: linear-gradient(176deg, #0B2748 0%, #082039 58%, #061A2E 100%);
}

.rail::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 2px;
  height: 42%;
  background: linear-gradient(180deg, var(--lime), rgba(200, 255, 61, 0));
  opacity: .8;
  pointer-events: none;
}

.rail-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  transition: opacity .2s var(--ease);
}

.rail-brand:hover { opacity: .86; }

.rail-brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border: 1px solid var(--lime);
  border-radius: 12px 4px 12px 4px;
  background: rgba(200, 255, 61, .09);
  box-shadow: inset 0 0 18px rgba(200, 255, 61, .16);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 1.34rem;
  font-weight: 700;
  line-height: 1;
}

.rail-brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.rail-brand__line {
  display: block;
  font-size: .92rem;
  font-weight: 700;
  color: var(--mist);
  letter-spacing: .02em;
  line-height: 1.3;
}

.rail-brand__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .02em;
  line-height: 1.5;
  color: var(--silent);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--edge);
  border-radius: 10px;
  background: rgba(18, 58, 94, .55);
  color: var(--mist);
  font-size: .82rem;
  font-weight: 700;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.nav-toggle:hover { border-color: var(--lime); color: var(--lime); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.nav-toggle__bars span:nth-child(3) { width: 62%; }

.nav-toggle__label { line-height: 1; }

.rail-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 6px;
}

.rail-nav__caption {
  padding-left: 13px;
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .26em;
  color: var(--gray);
  text-transform: uppercase;
}

.rail-nav__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail-nav__item { display: block; }

.rail-nav__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 10px 10px 0;
  color: var(--gray);
  font-size: .88rem;
  transition: color .18s var(--ease), background-color .18s var(--ease),
              border-left-color .18s var(--ease);
}

.rail-nav__link:hover {
  color: var(--mist);
  background: rgba(23, 59, 87, .72);
  border-left-color: var(--orange);
}

.rail-nav__link[aria-current="page"] {
  color: #07202F;
  background: var(--lime);
  border-left-color: var(--lime);
  font-weight: 700;
}

.rail-nav__idx {
  flex: 0 0 auto;
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: inherit;
  opacity: .72;
}

.rail-nav__link[aria-current="page"] .rail-nav__idx { opacity: .95; }

.rail-nav__label { line-height: 1.35; }

.rail-foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed rgba(143, 163, 184, .22);
}

.rail-foot__note {
  font-family: var(--font-mono);
  font-size: .68rem;
  line-height: 1.65;
  color: var(--gray);
}

.rail-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 14px;
  border-radius: 10px;
  background: var(--orange);
  color: #0A1B2C;
  font-size: .84rem;
  font-weight: 700;
  transition: background-color .2s var(--ease), transform .2s var(--ease);
}

.rail-cta:hover { background: #FF9145; transform: translateY(-1px); }

.rail-meter {
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: 6;
  width: 100%;
  height: 3px;
  background: rgba(143, 163, 184, .14);
}

.rail-meter__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--lime), var(--orange));
  transition: transform .12s linear;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-left: var(--rail-w);
  padding: clamp(40px, 6vw, 72px) var(--pad) 26px;
  border-top: 1px solid var(--edge);
  background: linear-gradient(180deg, #0B2748 0%, #082039 62%, #061A2E 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(520px, 70%);
  height: 2px;
  background: linear-gradient(90deg, var(--lime), var(--orange) 62%, transparent);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 48px);
  width: min(1180px, 100%);
  margin-inline: auto;
}

.footer-brand__mark {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-serif);
  font-size: 1.24rem;
  font-weight: 700;
  color: var(--mist);
}

.footer-brand__mark span {
  padding: 2px 9px;
  border: 1px solid var(--lime);
  border-radius: 8px 3px 8px 3px;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.4;
}

.footer-brand__tag {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--gray);
}

.footer-brand__statement {
  max-width: 34ch;
  margin-top: 12px;
  font-size: .93rem;
  line-height: 1.8;
  color: #CFDCEA;
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--gray);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  display: inline-block;
  font-size: .9rem;
  color: #C9D7E5;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.footer-link:hover {
  color: var(--lime);
  border-bottom-color: rgba(200, 255, 61, .55);
}

.footer-link--legal {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--silent);
}

.footer-contact__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 10px;
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .18em;
  color: var(--silent);
}

.footer-contact__val {
  font-size: .88rem;
  line-height: 1.6;
  color: #DCE7F3;
  overflow-wrap: anywhere;
}

.footer-contact__note {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--edge);
  font-size: .76rem;
  line-height: 1.75;
  color: var(--gray);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  width: min(1180px, 100%);
  margin: clamp(30px, 5vw, 52px) auto 0;
  padding-top: 18px;
  border-top: 1px solid rgba(143, 163, 184, .18);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-legal__meta,
.footer-legal__copy {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .03em;
  color: var(--silent);
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 15px;
  border: 1px solid var(--edge);
  border-radius: 999px;
  background: rgba(18, 58, 94, .55);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s var(--ease), border-color .2s var(--ease),
              color .2s var(--ease), transform .2s var(--ease);
}

.to-top[data-visible] {
  opacity: 1;
  pointer-events: auto;
}

.to-top:hover {
  border-color: var(--lime);
  color: var(--lime);
  transform: translateY(-2px);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
  :root { --rail-w: 220px; }
  .rail { padding: 22px 14px 20px; gap: 22px; }
  .rail-brand__mark { width: 40px; height: 40px; font-size: 1.2rem; }
  .rail-nav__link { font-size: .84rem; padding: 8px 10px; }
}

@media (max-width: 900px) {
  :root { --rail-w: 0px; --pad: clamp(16px, 5vw, 34px); }

  .site-header {
    position: sticky;
    top: 0;
    left: auto;
    right: auto;
    bottom: auto;
    width: 100%;
  }

  .rail {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    height: auto;
    padding: 13px 16px;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--edge);
    background: rgba(9, 32, 56, .95);
    backdrop-filter: blur(12px);
  }

  .rail::before { display: none; }

  .rail-brand { margin-right: auto; }
  .rail-brand__mark { width: 36px; height: 36px; font-size: 1.08rem; border-radius: 10px 3px 10px 3px; }
  .rail-brand__line { font-size: .84rem; }
  .rail-brand__sub { display: none; }

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

  .rail-nav {
    display: none;
    flex-basis: 100%;
    gap: 8px;
    margin-top: 4px;
    padding-top: 10px;
    border-top: 1px dashed rgba(143, 163, 184, .22);
  }

  .rail-nav[data-open] { display: flex; }

  .rail-nav__caption { padding-left: 2px; }

  .rail-nav__list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }

  .rail-nav__item { flex: 1 1 45%; min-width: 128px; }

  .rail-nav__link {
    padding: 10px 12px;
    border-left: 0;
    border-radius: 10px;
    background: rgba(23, 59, 87, .55);
  }

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

  .rail-foot { display: none; }

  .rail-meter { position: absolute; bottom: 0; }

  .rail-offset { margin-left: 0; }

  .site-footer { margin-left: 0; }

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

  .footer-brand { grid-column: 1 / -1; }

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

@media (max-width: 560px) {
  .footer-main { grid-template-columns: minmax(0, 1fr); }
  .footer-legal { flex-direction: column; align-items: flex-start; }
  .rail-nav__item { flex: 1 1 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .btn:hover,
  .rail-cta:hover,
  .to-top:hover { transform: none; }
}