/* =========================================================
   奥门皇8站 · 共享样式表 /assets/site.css
   深海控制台色系 · 细线框 · 等宽索引 · 居中刊头
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, dl, dd, figure, blockquote, fieldset { margin: 0; }

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

img, svg, picture, 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; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #071428;
  --ink-850: #081a30;
  --ink-800: #0B1F3A;
  --ink-750: #0d2545;
  --line: #1D3B5C;
  --line-soft: rgba(29, 59, 92, 0.62);

  --cyan: #2DE2E6;
  --mint: #9AF5E8;
  --amber: #F5B84B;
  --gold-light: #FFD98A;
  --coral: #FF6B6B;

  --mist: #EAF2FF;
  --body-ink: #CFDDEF;
  --slate: #7993B8;

  --shell: 1280px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 2px;

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

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-card: 0 1px 0 rgba(45, 226, 230, 0.06), 0 18px 40px -28px rgba(0, 0, 0, 0.9);
}

/* ---------- 3. 基础与中文排版 ---------- */
body {
  background-color: var(--ink-900);
  color: var(--body-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  min-height: 100vh;
  overflow-x: hidden;
  isolation: isolate;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(820px 520px at 84% -8%, rgba(45, 226, 230, 0.13), transparent 62%),
    radial-gradient(660px 460px at 2% 2%, rgba(245, 184, 75, 0.08), transparent 65%),
    linear-gradient(rgba(29, 59, 92, 0.28) 1px, transparent 1px) 0 0 / 132px 132px,
    linear-gradient(90deg, rgba(29, 59, 92, 0.28) 1px, transparent 1px) 0 0 / 132px 132px;
  -webkit-mask-image: radial-gradient(1200px 800px at 50% 0%, #000 18%, transparent 88%);
  mask-image: radial-gradient(1200px 800px at 50% 0%, #000 18%, transparent 88%);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--mist);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(34px, 4.6vw, 56px); font-weight: 800; line-height: 1.08; }
h2 { font-size: clamp(24px, 2.8vw, 36px); }
h3 { font-size: clamp(18px, 2vw, 24px); font-weight: 600; line-height: 1.3; }

p { text-wrap: pretty; }

strong { color: var(--mist); font-weight: 700; }

::selection { background: var(--cyan); color: #04121f; }

main { display: block; }

/* ---------- 4. 工具类 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.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;
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 50%;
  z-index: 200;
  padding: 10px 20px;
  background: var(--cyan);
  color: #04121f;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px -12px rgba(45, 226, 230, 0.8);
  transform: translate(-50%, -180%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- 6. 阅读进度条 ---------- */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 150;
  pointer-events: none;
  background: rgba(29, 59, 92, 0.5);
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--amber) 100%);
  box-shadow: 0 0 12px rgba(45, 226, 230, 0.55);
}

/* ---------- 7. 页头 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  background: linear-gradient(180deg, #061223 0%, #081a30 68%, #081a30 100%);
  border-bottom: 1px solid var(--line);
}

/* 顶部状态条 */
.header-strip {
  border-bottom: 1px solid var(--line-soft);
  background: rgba(7, 20, 40, 0.6);
}

.header-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 34px;
  padding-block: 4px;
}

.header-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate);
  white-space: nowrap;
}

.header-strip__item--mono { color: var(--slate); }

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex: none;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(45, 226, 230, 0.16), 0 0 10px rgba(45, 226, 230, 0.7);
}

/* 居中刊头 */
.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 20px;
  padding-block: 22px 18px;
}

.masthead__aside {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--slate);
}

.masthead__brand { justify-self: center; }

.masthead__actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  row-gap: 6px;
}

.brand__mark {
  width: 20px;
  height: 20px;
  flex: none;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--amber) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
}

.brand__name {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.brand__rule {
  width: 1px;
  height: 20px;
  background: var(--line);
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--slate);
  white-space: nowrap;
}

.brand--footer .brand__name { font-size: 26px; }
.brand--footer .brand__sub { letter-spacing: 0.12em; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.03em;
  white-space: nowrap;
  transition: background-color 0.18s var(--ease),
              color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}

.btn--solid {
  background: var(--cyan);
  color: #04121f;
}
.btn--solid:hover { background: var(--mint); }

.btn--ghost {
  background: rgba(11, 31, 58, 0.65);
  border-color: var(--line);
  color: var(--mist);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.btn--amber {
  background: var(--amber);
  color: #1a1000;
}
.btn--amber:hover { background: var(--gold-light); }

.btn--sm { padding: 8px 14px; font-size: 13px; }

/* 移动开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 31, 58, 0.85);
  color: var(--mist);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

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

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--cyan);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.site-header[data-open] .nav-toggle__bars span:first-child {
  transform: translateY(2.75px) rotate(45deg);
}
.site-header[data-open] .nav-toggle__bars span:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

/* 栏目带 */
.nav-band {
  display: block;
  border-top: 1px solid var(--line-soft);
  background: rgba(11, 31, 58, 0.5);
}

.nav-band__inner {
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 2px;
  counter-reset: nav;
  width: 100%;
}

.nav-list > li { counter-increment: nav; }

.nav-link {
  position: relative;
  display: block;
  padding: 15px 18px 16px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--slate);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav-link::before {
  content: counter(nav, decimal-leading-zero);
  display: inline-block;
  margin-right: 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--amber);
  opacity: 0.62;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 50% 100%;
  transition: transform 0.22s var(--ease), background-color 0.18s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--mist); }

.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--mist);
  font-weight: 700;
  background: linear-gradient(180deg, rgba(45, 226, 230, 0.14), rgba(45, 226, 230, 0));
}

.nav-link[aria-current="page"]::before { opacity: 1; }

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--amber);
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  background: linear-gradient(180deg, rgba(7, 20, 40, 0.3) 0%, #061223 34%, #050f1e 100%);
  border-top: 1px solid var(--line);
  color: var(--slate);
}

.footer-rule {
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--amber) 40%, rgba(29, 59, 92, 0) 100%);
  opacity: 0.6;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3.6vw, 52px);
  padding-block: clamp(40px, 5.6vw, 68px) clamp(28px, 4vw, 46px);
}

.footer-intro { min-width: 0; }

.footer-tagline {
  margin-top: 18px;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-facts {
  margin-top: 22px;
  display: grid;
  gap: 10px;
  max-width: 40ch;
}

.footer-fact {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.footer-fact dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.footer-fact dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
  overflow-wrap: anywhere;
}

.footer-hours {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(121, 147, 184, 0.85);
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.footer-col__list { display: grid; gap: 1px; }

.footer-link {
  position: relative;
  display: inline-block;
  padding-block: 5px;
  font-size: 14px;
  color: var(--slate);
  transition: color 0.16s var(--ease);
}

.footer-link::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--cyan);
  opacity: 0;
  transition: opacity 0.16s var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible { color: var(--mist); }
.footer-link:hover::before,
.footer-link:focus-visible::before { opacity: 1; }

.footer-base {
  border-top: 1px solid var(--line-soft);
  background: rgba(5, 15, 30, 0.85);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 18px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--slate);
}

.footer-legal__mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

.footer-legal__sep { color: var(--line); }

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 18px;
}

.footer-legal__links .footer-link { font-size: 12px; }

/* ---------- 9. 通用页面组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  flex: none;
  background: var(--amber);
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 18px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: var(--line); }
.crumbs a { transition: color 0.16s var(--ease); }
.crumbs a:hover, .crumbs a:focus-visible { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--mist); }

.page-head {
  display: grid;
  gap: 12px;
  padding-block: clamp(24px, 3.6vw, 44px) clamp(20px, 3vw, 32px);
  border-bottom: 1px solid var(--line);
}

.prose {
  max-width: 72ch;
  color: var(--body-ink);
}

.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose p + p { margin-top: 1em; }
.prose ul,
.prose ol {
  margin-top: 1em;
  padding-left: 1.3em;
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.45em; }
.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--mint); }

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(11, 31, 58, 0.92), rgba(7, 20, 40, 0.86));
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s var(--ease);
}

.card:hover { border-color: rgba(45, 226, 230, 0.45); }

.card__meta {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.card__title {
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 600;
  line-height: 1.35;
  color: var(--mist);
}

.card__body {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: #aec2db;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(11, 31, 58, 0.7);
  color: var(--slate);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.18s var(--ease),
              border-color 0.18s var(--ease),
              background-color 0.18s var(--ease),
              box-shadow 0.18s var(--ease);
}

.chip:hover {
  color: var(--mist);
  border-color: rgba(45, 226, 230, 0.55);
}

.chip[aria-pressed="true"] {
  color: #04121f;
  font-weight: 700;
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(45, 226, 230, 0.14);
}

.chip[aria-pressed="true"]::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #04121f;
}

.tabs { display: block; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

.tabs__tab {
  position: relative;
  margin-bottom: -1px;
  padding: 12px 18px;
  border-bottom: 2px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--slate);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.tabs__tab:hover { color: var(--mist); }

.tabs__tab[aria-selected="true"] {
  color: var(--mist);
  border-bottom-color: var(--cyan);
}

.tabs__panel { animation: tabFade 0.22s var(--ease) both; }

.tabs__panel[hidden] { display: none; }

@keyframes tabFade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

/* 图片容器基础规则 */
.media {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--ink-800);
  background-image:
    linear-gradient(135deg, rgba(45, 226, 230, 0.1), rgba(245, 184, 75, 0.06) 55%, transparent 100%),
    repeating-linear-gradient(135deg, rgba(29, 59, 92, 0.55) 0 1px, transparent 1px 18px);
}

.media--wide { aspect-ratio: 16 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--portrait { aspect-ratio: 3 / 4; }
.media--banner { aspect-ratio: 21 / 9; }

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

.media__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 15, 30, 0.84);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mint);
}

/* ---------- 10. 焦点可见性 ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-intro { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .masthead {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand toggle"
      "actions actions";
    row-gap: 16px;
    padding-block: 18px 16px;
  }

  .masthead__aside { display: none; }
  .masthead__brand { grid-area: brand; justify-self: start; }
  .nav-toggle { grid-area: toggle; justify-self: end; }

  .masthead__actions {
    grid-area: actions;
    justify-self: stretch;
    display: flex;
    gap: 10px;
  }
  .masthead__actions .btn { flex: 1 1 0; }

  .nav-band {
    display: none;
    border-top: 1px solid var(--line);
    background: var(--ink-800);
  }

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

  .nav-band__inner { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: 6px;
  }

  .nav-list > li + li { border-top: 1px solid var(--line-soft); }

  .nav-link { padding: 14px 2px; }
  .nav-link::after { left: 2px; right: auto; width: 24px; }

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

@media (max-width: 860px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .header-strip__item--mono { display: none; }
  .brand__sub { display: none; }
  .brand__rule { display: none; }
  .brand__name { font-size: 24px; }

  .footer-fact {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }
}

@media (max-width: 640px) {
  .footer-main { grid-template-columns: minmax(0, 1fr); }
  .footer-base__inner { justify-content: flex-start; }
  .footer-legal__links { gap: 4px 14px; }
}

/* ---------- 12. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .tabs__panel { animation: none; }
}

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