/* =========================================================
   PG游艺中心 · 共享样式 /assets/site.css
   北境控制台：左侧轨道导航 + 堆叠面板 + 等宽读数
   ========================================================= */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd, address { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
table { border-collapse: collapse; }

/* ---------- tokens ---------- */
:root {
  --ink-950: #04131F;
  --ink-900: #071E30;
  --ink-800: #0B2A42;
  --ink-700: #123B57;
  --cyan-500: #38E0D0;
  --cyan-300: #8CF5EA;
  --amber-500: #FFB24A;
  --amber-300: #FFD08A;
  --fog-400: #93A7B8;
  --ice-200: #C7D7E3;
  --snow-50: #F2F7FA;

  --rail-w: 280px;
  --bar-h: 64px;
  --pad-x: clamp(18px, 4vw, 56px);
  --radius-lg: 22px;
  --radius-md: 14px;
  --shadow-panel: 0 26px 60px -34px rgba(0, 0, 0, .95);
  --dur: 200ms;

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

/* ---------- base ---------- */
body {
  font-family: var(--font-sans);
  font-size: clamp(16px, 1.02vw, 17.5px);
  line-height: 1.75;
  color: var(--ice-200);
  background-color: var(--ink-950);
  background-image:
    repeating-linear-gradient(90deg, rgba(199, 215, 227, .045) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(199, 215, 227, .032) 0 1px, transparent 1px 96px),
    radial-gradient(1100px 560px at 88% -12%, rgba(56, 224, 208, .10), transparent 62%),
    radial-gradient(880px 520px at 8% 108%, rgba(255, 178, 74, .07), transparent 66%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.16;
  color: var(--snow-50);
}
h1 { font-size: clamp(2.2rem, 4.5vw, 4rem); }
h2 { font-size: clamp(1.6rem, 2.8vw, 2.5rem); }
h3 { font-size: clamp(1.18rem, 1.8vw, 1.5rem); line-height: 1.3; }
h4 { font-size: 1.02rem; letter-spacing: -.01em; }
p { max-width: 72ch; }
strong { color: var(--snow-50); font-weight: 700; }
small { font-size: .84rem; color: var(--fog-400); }

a { color: var(--cyan-300); text-decoration-thickness: 1px; text-underline-offset: .22em; }
a:hover { color: var(--cyan-500); }

::selection { background: rgba(56, 224, 208, .3); color: var(--snow-50); }

:focus-visible {
  outline: 2px solid var(--cyan-300);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.skip-link {
  position: fixed;
  top: 10px; left: 10px;
  z-index: 200;
  padding: 11px 18px;
  border-radius: 10px;
  background: var(--snow-50);
  color: var(--ink-950);
  font-weight: 700;
  font-size: .9rem;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform var(--dur) ease;
}
.skip-link:focus { transform: translateY(0); color: var(--ink-950); }

/* ---------- header: 侧边轨道 ---------- */
.site-rail {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--rail-w);
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 3vh, 32px);
  padding: 26px 20px 22px;
  background: linear-gradient(175deg, #071E30 0%, #04131F 62%, #05161F 100%);
  border-right: 1px solid var(--ink-700);
  overflow: hidden;
}
.site-rail::after {
  content: "";
  position: absolute;
  right: -1px; bottom: 0;
  width: 130px; height: 190px;
  background:
    linear-gradient(158deg, transparent 44%, rgba(56, 224, 208, .14) 44%, rgba(56, 224, 208, .14) 51%, transparent 51%),
    linear-gradient(158deg, transparent 62%, rgba(255, 178, 74, .10) 62%, rgba(255, 178, 74, .10) 66%, transparent 66%);
  pointer-events: none;
}

.rail__head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.rail__brand {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  text-decoration: none;
  color: inherit;
}
.rail__mark {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  display: grid;
  place-items: center;
  background: var(--ink-800);
  border: 1px solid var(--cyan-500);
  border-radius: 13px 4px 13px 4px;
  color: var(--cyan-300);
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .04em;
}
.rail__names { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.rail__name {
  font-size: 1.03rem;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--snow-50);
  white-space: nowrap;
}
.rail__badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .08em;
  color: var(--amber-300);
  background: rgba(255, 178, 74, .10);
  border: 1px solid rgba(255, 178, 74, .42);
  border-radius: 999px;
  padding: 2px 9px;
  white-space: nowrap;
}

.rail__toggle {
  display: none;
  margin-left: auto;
  width: 46px; height: 46px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: rgba(11, 42, 66, .9);
  border: 1px solid var(--ink-700);
  border-radius: 12px;
  cursor: pointer;
}
.rail__toggle span {
  display: block;
  width: 18px; height: 2px;
  border-radius: 2px;
  background: var(--ice-200);
  transition: transform var(--dur) ease, opacity var(--dur) ease;
}

.rail__nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding-right: 2px;
}
.rail__navlabel {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .16em;
  color: var(--fog-400);
  margin-bottom: 12px;
  max-width: none;
}
.rail__list { display: flex; flex-direction: column; gap: 2px; }
.rail__item { margin: 0; }
.rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px 11px 14px;
  border-left: 2px solid transparent;
  border-radius: 10px;
  text-decoration: none;
  font-size: .94rem;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ice-200);
  transition: background-color var(--dur) ease, color var(--dur) ease,
              border-color var(--dur) ease, transform var(--dur) ease;
}
.rail__index {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .06em;
  color: var(--fog-400);
  transition: color var(--dur) ease;
}
.rail__label { min-width: 0; }
.rail__link:hover {
  background: rgba(56, 224, 208, .08);
  color: var(--snow-50);
  transform: translateX(2px);
}
.rail__link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(56, 224, 208, .18), rgba(56, 224, 208, .015));
  border-left-color: var(--cyan-500);
  color: var(--snow-50);
}
.rail__link[aria-current="page"] .rail__index { color: var(--amber-300); }

.rail__foot {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--ink-700);
}
.rail__utility { display: flex; flex-wrap: wrap; gap: 8px; }
.utility {
  flex: 1 1 auto;
  text-align: center;
  padding: 9px 10px;
  border-radius: 9px;
  border: 1px solid var(--ink-700);
  color: var(--ice-200);
  font-size: .82rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color var(--dur) ease, color var(--dur) ease, background-color var(--dur) ease;
}
.utility:hover { border-color: var(--cyan-500); color: var(--cyan-300); background: rgba(56, 224, 208, .07); }
.utility--accent {
  color: var(--amber-300);
  border-color: rgba(255, 178, 74, .48);
  background: rgba(255, 178, 74, .09);
}
.utility--accent:hover { color: var(--amber-300); border-color: var(--amber-500); background: rgba(255, 178, 74, .16); }
.rail__meta {
  font-family: var(--font-mono);
  font-size: .67rem;
  line-height: 1.9;
  letter-spacing: .02em;
  color: var(--fog-400);
  max-width: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: var(--rail-w);
  right: 0;
  height: 3px;
  background: rgba(199, 215, 227, .08);
  z-index: 90;
  pointer-events: none;
}
.scroll-progress span {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan-500), var(--amber-500));
}

/* ---------- header: 移动端横条与抽屉 ---------- */
@media (max-width: 1023px) {
  body { padding-left: 0; }

  .site-rail {
    position: sticky;
    top: 0; left: 0; right: 0; bottom: auto;
    width: 100%;
    height: auto;
    min-height: var(--bar-h);
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    gap: 12px;
    padding: 9px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--ink-700);
    background: rgba(4, 19, 31, .94);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    overflow: visible;
  }
  .site-rail::after { display: none; }
  .rail__head { flex: 1 1 auto; min-width: 0; }
  .rail__mark { width: 36px; height: 36px; font-size: .68rem; }
  .rail__name { font-size: .96rem; }
  .rail__badge { font-size: .6rem; padding: 1px 8px; }
  .rail__toggle { display: inline-flex; }

  .rail__nav {
    position: fixed;
    top: var(--bar-h);
    left: 0; right: 0;
    max-height: calc(100dvh - var(--bar-h));
    overflow-y: auto;
    flex: 0 0 auto;
    padding: 16px 16px 24px;
    background: linear-gradient(180deg, #071E30, #04131F);
    border-bottom: 1px solid var(--ink-700);
    box-shadow: 0 34px 60px -30px #000;
    z-index: 85;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--dur) ease, transform var(--dur) ease, visibility var(--dur) ease;
  }
  .site-rail[data-open] .rail__nav {
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .site-rail[data-open] .rail__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-rail[data-open] .rail__toggle span:nth-child(2) { opacity: 0; }
  .site-rail[data-open] .rail__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .rail__list { gap: 4px; }
  .rail__link { min-height: 52px; padding: 13px 14px; font-size: 1rem; border-left-width: 3px; }
  .rail__index { font-size: .72rem; }

  .rail__foot { display: none; }
  .scroll-progress { left: 0; }
  body.nav-open { overflow: hidden; }
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(46px, 7vw, 96px);
  padding: clamp(34px, 5vw, 64px) var(--pad-x) 26px;
  background: linear-gradient(180deg, rgba(11, 42, 66, .35), #071E30 38%, #04131F 100%);
  border-top: 1px solid var(--ink-700);
  overflow: hidden;
  color: var(--ice-200);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: var(--pad-x);
  width: min(340px, 52%);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-500), transparent);
}
.site-footer::after {
  content: "";
  position: absolute;
  right: -120px; top: -90px;
  width: 360px; height: 360px;
  border-radius: 52% 48% 38% 62% / 46% 56% 44% 54%;
  background: radial-gradient(circle at 35% 35%, rgba(255, 178, 74, .16), rgba(255, 178, 74, 0) 68%);
  pointer-events: none;
}
.footer__grid {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin-inline: auto;
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  grid-template-columns: 1fr;
}
.footer__brand { display: flex; flex-direction: column; gap: 12px; }
.footer__wordmark {
  font-size: 1.28rem;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--snow-50);
}
.footer__tagline {
  font-family: var(--font-mono);
  font-size: .73rem;
  letter-spacing: .07em;
  line-height: 1.9;
  color: var(--cyan-300);
}
.footer__note {
  font-size: .85rem;
  line-height: 1.8;
  color: var(--fog-400);
  max-width: 36ch;
}
.footer__copy { display: flex; flex-wrap: wrap; gap: 8px; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 8px 15px;
  border-radius: 10px;
  border: 1px solid var(--ink-700);
  background: rgba(11, 42, 66, .7);
  color: var(--ice-200);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .01em;
  cursor: pointer;
  transition: border-color var(--dur) ease, color var(--dur) ease, background-color var(--dur) ease;
}
.copy-btn:hover { border-color: var(--cyan-500); color: var(--cyan-300); background: rgba(56, 224, 208, .08); }
.copy-btn.is-copied { border-color: var(--amber-500); color: var(--amber-300); background: rgba(255, 178, 74, .12); }

.footer__col { display: flex; flex-direction: column; gap: 12px; }
.footer__heading {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fog-400);
}
.footer__links { display: flex; flex-direction: column; gap: 9px; }
.footer__link {
  width: fit-content;
  font-size: .9rem;
  color: var(--ice-200);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}
.footer__link:hover { color: var(--cyan-300); border-bottom-color: var(--cyan-500); }

.footer__contact { display: flex; flex-direction: column; gap: 12px; }
.footer__address { display: flex; flex-direction: column; gap: 11px; font-style: normal; }
.footer__line { display: flex; flex-direction: column; gap: 2px; }
.footer__label {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--fog-400);
}
.footer__value { font-size: .88rem; color: var(--snow-50); word-break: break-word; }

.footer__bottom {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: clamp(26px, 4vw, 44px) auto 0;
  padding-top: 16px;
  border-top: 1px solid rgba(199, 215, 227, .12);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 20px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .02em;
  color: var(--fog-400);
}
.footer__copyright, .footer__icp { max-width: none; }
.footer__service { max-width: none; flex: 1 1 220px; color: var(--fog-400); }

@media (min-width: 720px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1120px) {
  .footer__grid { grid-template-columns: 1.5fr .8fr .7fr 1.1fr; }
}

/* ---------- 页面布局 ---------- */
.page-shell {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--pad-x);
  padding-block: clamp(26px, 4vw, 54px);
}
.section { margin-block: clamp(34px, 5vw, 72px); }
.section--narrow { max-width: 820px; }

.grid { display: grid; gap: clamp(14px, 2vw, 24px); grid-template-columns: 1fr; }
@media (min-width: 720px) {
  .grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: start; }
}
@media (min-width: 1100px) {
  .grid--split { grid-template-columns: minmax(0, 1fr) minmax(0, 2.05fr); }
}

.divider-slant {
  height: 1px;
  border: 0;
  margin-block: clamp(24px, 4vw, 48px);
  background: linear-gradient(90deg, transparent, rgba(199, 215, 227, .28), transparent);
  transform: skewX(-8deg);
}

/* ---------- 面板 / 卡片 ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 2.6vw, 34px);
  background: linear-gradient(160deg, rgba(11, 42, 66, .92), rgba(7, 30, 48, .92));
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
}
.panel + .panel { margin-top: clamp(16px, 2vw, 26px); }
.panel::before {
  content: "";
  position: absolute;
  left: 0; top: 24px;
  width: 3px; height: 40px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--cyan-500), transparent);
}
.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(199, 215, 227, .12);
}
.panel__title { font-size: clamp(1.15rem, 1.9vw, 1.5rem); }
.panel__body { max-width: 74ch; }

.card {
  background: rgba(11, 42, 66, .55);
  border: 1px solid var(--ink-700);
  border-radius: 16px;
  padding: clamp(16px, 2vw, 24px);
  transition: transform var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}
.card:hover { transform: translateY(-3px); border-color: rgba(56, 224, 208, .5); }
.card__title { font-size: 1.05rem; margin-bottom: 8px; }
.card__meta {
  font-family: var(--font-mono);
  font-size: .71rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--fog-400);
}

/* ---------- 文本 ---------- */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-300);
}
.kicker::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--cyan-500);
}
.lede {
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  line-height: 1.7;
  color: var(--ice-200);
}
.prose p + p { margin-top: 1.05em; }
.prose ul, .prose ol { margin-block: 1em; padding-left: 1.3em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .45em; }
.prose h3 { margin-block: 1.6em .6em; }

/* ---------- 标签 / 按钮 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid var(--ink-700);
  background: rgba(11, 42, 66, .6);
  color: var(--ice-200);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
}
.tag--cyan { border-color: rgba(56, 224, 208, .45); background: rgba(56, 224, 208, .1); color: var(--cyan-300); }
.tag--amber { border-color: rgba(255, 178, 74, .45); background: rgba(255, 178, 74, .1); color: var(--amber-300); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  min-height: 46px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 700;
  font-size: .94rem;
  letter-spacing: -.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--dur) ease, background-color var(--dur) ease,
              border-color var(--dur) ease, color var(--dur) ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: linear-gradient(115deg, var(--amber-500), var(--amber-300));
  color: #1B1103;
  box-shadow: 0 16px 32px -20px rgba(255, 178, 74, .95);
}
.btn--primary:hover { color: #1B1103; }
.btn--ghost {
  background: rgba(11, 42, 66, .6);
  border-color: var(--ink-700);
  color: var(--snow-50);
}
.btn--ghost:hover { border-color: var(--cyan-500); color: var(--cyan-300); }
.btn--quiet { background: transparent; color: var(--cyan-300); padding-inline: 6px; }
.btn--quiet:hover { color: var(--snow-50); }

/* ---------- 数据表 ---------- */
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--ink-700);
  border-radius: 16px;
  background: rgba(7, 30, 48, .6);
  -webkit-overflow-scrolling: touch;
}
.data-table { width: 100%; min-width: 560px; font-size: .92rem; }
.data-table caption {
  padding: 14px 16px;
  text-align: left;
  font-size: .8rem;
  color: var(--fog-400);
}
.data-table th, .data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(199, 215, 227, .1);
}
.data-table thead th {
  position: sticky;
  top: 0;
  background: rgba(11, 42, 66, .95);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fog-400);
}
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: rgba(56, 224, 208, .06); }
.data-table .num {
  font-family: var(--font-mono);
  text-align: right;
  color: var(--amber-300);
}

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.1;
  color: var(--snow-50);
}
.stat__label { font-size: .78rem; letter-spacing: .06em; color: var(--fog-400); }

/* ---------- 面包屑 ---------- */
.breadcrumb { margin-bottom: 18px; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: var(--fog-400);
}
.breadcrumb__item { display: flex; align-items: center; gap: 8px; }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; color: var(--fog-400); opacity: .6; }
.breadcrumb__link {
  color: var(--ice-200);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}
.breadcrumb__link:hover { color: var(--cyan-300); border-bottom-color: var(--cyan-500); }
.breadcrumb__current { color: var(--snow-50); font-weight: 600; }

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-lg);
  background:
    repeating-linear-gradient(45deg, rgba(56, 224, 208, .07) 0 2px, transparent 2px 12px),
    linear-gradient(150deg, #0B2A42, #04131F);
}
.media-frame__img { width: 100%; height: 100%; object-fit: cover; }
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(160deg, rgba(56, 224, 208, .14), transparent 45%, rgba(255, 178, 74, .1));
  mix-blend-mode: screen;
}
.media-frame__caption {
  position: absolute;
  left: 14px; bottom: 12px;
  z-index: 2;
  padding: 4px 10px;
  border: 1px solid var(--ink-700);
  border-radius: 8px;
  background: rgba(4, 19, 31, .74);
  color: var(--ice-200);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 6px; bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-500), rgba(56, 224, 208, .08));
}
.timeline__item { position: relative; padding: 0 0 22px 4px; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -24px; top: 9px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--ink-950);
  border: 1px solid var(--cyan-500);
}
.timeline__item[data-state="active"]::before {
  background: var(--amber-500);
  border-color: var(--amber-300);
  box-shadow: 0 0 0 4px rgba(255, 178, 74, .16);
}
.timeline__marker {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: .71rem;
  letter-spacing: .1em;
  color: var(--amber-300);
}

/* ---------- 标签页 ---------- */
.tabs { --tab-accent: var(--cyan-500); }
.tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  width: fit-content;
  max-width: 100%;
  padding: 6px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  background: rgba(11, 42, 66, .7);
}
.tab {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ice-200);
  font-size: .88rem;
  font-weight: 600;
  padding: 9px 18px;
  min-height: 40px;
  cursor: pointer;
  transition: background-color var(--dur) ease, color var(--dur) ease;
}
.tab:hover { background: rgba(56, 224, 208, .1); color: var(--snow-50); }
.tab[aria-selected="true"] {
  background: linear-gradient(120deg, var(--cyan-500), var(--cyan-300));
  color: #04131F;
}
.tabpanel { padding-top: 18px; }
.tabpanel[hidden] { display: none; }

/* ---------- 显现动效 ---------- */
[data-reveal].reveal-armed {
  opacity: 0;
  transform: translateY(16px);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 460ms ease, transform 460ms ease;
}

/* ---------- 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;
  }
  [data-reveal].reveal-armed { opacity: 1 !important; transform: none !important; }
  .btn:hover, .card:hover, .rail__link:hover { transform: none !important; }
}