/* ============================================================
   BEPLAY · 共享站套件 /assets/site.css
   母题：深夜控制室 · 玻璃层压实色块 · 等宽索引 · Bento 网格
   ============================================================ */

:root {
  /* 色彩 */
  --ink-950: #0A1420;
  --ink-900: #0E1B2C;
  --ink-800: #16293D;
  --ink-700: #22405A;
  --signal: #FF6A2B;
  --signal-soft: #FF9A66;
  --teal: #2FD4C4;
  --teal-deep: #14867E;
  --sand: #D9A85C;
  --paper: #F5F2EA;
  --slate: #8FA3B8;
  --white: #FFFFFF;
  --text-dark: #E8EEF5;
  --text-muted: #A9BACB;
  --focus: #2FD4C4;

  /* 字体 */
  --font-sans: 'PingFang SC', 'Noto Sans SC', 'Source Han Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 排版尺度 */
  --fs-body: 16px;
  --lh-body: 1.75;
  --fs-small: 14px;
  --fs-label: 12px;
  --fs-h1: clamp(2rem, 4.6vw, 2.75rem);
  --fs-h2: clamp(1.5rem, 3.1vw, 1.875rem);
  --fs-h3: 1.25rem;

  /* 空间 */
  --max-w: 1280px;
  --gutter: clamp(20px, 4vw, 48px);
  --radius: 16px;
  --radius-sm: 10px;
  --header-h: 76px;
  --header-h-compact: 60px;

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .24s;
}

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

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

body {
  margin: 0;
  background: var(--ink-950);
  color: var(--text-dark);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
picture,
svg { display: block; max-width: 100%; height: auto; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .6em;
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.2;
  color: var(--white);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p {
  margin: 0 0 1em;
  max-width: 38em;
}

a {
  color: var(--teal);
  text-decoration: none;
  transition: color .18s var(--ease);
}
a:hover { color: var(--signal-soft); }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
}

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

::selection {
  background: var(--signal);
  color: var(--ink-950);
}

/* ---------- 排版工具 ---------- */
.mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  font-feature-settings: "tnum" 1;
}

.eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--teal);
}

.index-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(56px, 10vw, 132px);
  font-weight: 700;
  line-height: .8;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1px var(--ink-700);
  user-select: none;
  pointer-events: none;
}

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

.section { padding-block: clamp(40px, 7vw, 88px); }

.section--paper {
  background: var(--paper);
  color: var(--ink-900);
}
.section--paper h1,
.section--paper h2,
.section--paper h3 { color: var(--ink-900); }
.section--paper p,
.section--paper .prose { color: #22303F; }
.section--paper a { color: var(--teal-deep); }
.section--paper a:hover { color: var(--signal); }

.prose { max-width: 720px; }
.prose p { max-width: 38em; }

.stack > * + * { margin-top: 1rem; }

.grid {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .01em;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background .18s var(--ease),
              color .18s var(--ease),
              border-color .18s var(--ease);
}

.btn--sm {
  padding: 9px 15px;
  font-size: 12.5px;
}

.btn--ghost {
  color: var(--teal);
  border-color: var(--teal-deep);
  background: rgba(47, 212, 196, .07);
}
.btn--ghost:hover {
  color: var(--ink-950);
  background: var(--teal);
  border-color: var(--teal);
}

.btn--primary {
  color: var(--ink-950);
  background: var(--signal);
  border-color: var(--signal);
  font-weight: 700;
}
.btn--primary:hover {
  color: var(--ink-950);
  background: var(--signal-soft);
  border-color: var(--signal-soft);
}

.btn--sand {
  color: var(--ink-950);
  background: var(--sand);
  border-color: var(--sand);
}
.btn--sand:hover {
  color: var(--ink-950);
  background: #E7BD7A;
  border-color: #E7BD7A;
}

.btn--quiet {
  color: var(--text-dark);
  border-color: var(--ink-700);
  background: transparent;
}
.btn--quiet:hover {
  color: var(--white);
  border-color: var(--slate);
  background: rgba(255, 255, 255, .05);
}

/* ============================================================
   头部命令栏
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(14, 27, 44, .90);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--ink-700);
  transition: background var(--dur) ease, border-color var(--dur) ease;
}

.site-header[data-compact] {
  background: rgba(14, 27, 44, .97);
  border-bottom-color: var(--ink-700);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  height: var(--header-h);
  transition: height var(--dur) var(--ease);
}
.site-header[data-compact] .header-inner { height: var(--header-h-compact); }

/* 跳转链接 */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -72px;
  z-index: 8;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--signal);
  color: var(--ink-950);
  font-size: 14px;
  font-weight: 700;
  transition: top .18s var(--ease);
}
.skip-link:focus-visible {
  top: 0;
  color: var(--ink-950);
  outline-offset: -4px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--white);
}
.brand:hover { color: var(--white); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--signal), #FF8A4D);
  color: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .02em;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .26);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--white);
}

.brand-sub {
  margin-top: 4px;
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--slate);
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 8px 12px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  color: var(--text-dark);
  cursor: pointer;
  transition: border-color .18s var(--ease), background .18s var(--ease);
}
.nav-toggle:hover { border-color: var(--slate); background: rgba(255, 255, 255, .04); }

.nav-toggle-icon {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle-bar {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.nav-toggle-label {
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: .1em;
}

.site-header[data-open] .nav-toggle-bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 主导航 */
.primary-nav { flex: 1 1 auto; min-width: 0; }

.nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(4px, 1.2vw, 16px);
  flex-wrap: nowrap;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 2px;
  font-size: 13.5px;
  font-weight: 500;
  color: #BFCFDF;
  white-space: nowrap;
  transition: color .18s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 2px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .2s var(--ease);
}

.nav-link:hover { color: var(--white); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-index {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: .04em;
  color: var(--teal-deep);
  transition: color .18s var(--ease);
}
.nav-link:hover .nav-index { color: var(--teal); }

.nav-link[aria-current="page"] { color: var(--white); font-weight: 700; }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] .nav-index { color: var(--signal); }

/* 头部行动区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}
.scroll-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--signal) 70%, var(--sand));
  transition: width .12s linear;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink-950);
  border-top: 1px solid var(--ink-700);
}

.footer-inner { padding-block: clamp(40px, 6vw, 72px) 26px; }

.footer-brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 28px;
  padding-bottom: clamp(22px, 4vw, 34px);
  border-bottom: 1px solid var(--ink-700);
}

.footer-brand-mark {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--white);
}
.footer-brand-mark:hover { color: var(--teal); }

.footer-tagline {
  margin: 0;
  max-width: 34em;
  font-size: 14px;
  color: var(--slate);
}

.footer-body {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  padding-block: clamp(26px, 4vw, 40px);
  border-bottom: 1px solid var(--ink-700);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
}

.footer-col-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--sand);
}

.footer-link {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: #BFCFDF;
  transition: color .16s var(--ease);
}
.footer-link:hover { color: var(--teal); }

.footer-contact {
  padding-left: clamp(16px, 3vw, 32px);
  border-left: 1px solid var(--ink-700);
}

.footer-eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--sand);
}

.contact-list { margin: 0; }

.contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 10px;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(34, 64, 90, .8);
  font-size: 13.5px;
}
.contact-item:last-child { border-bottom: 0; }

.contact-label {
  flex: 0 0 auto;
  min-width: 2.4em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--slate);
}

.contact-value {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--text-dark);
  word-break: break-all;
}

.copy-btn {
  flex: 0 0 auto;
  margin-left: auto;
  padding: 4px 10px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  background: transparent;
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}
.copy-btn:hover {
  color: var(--teal);
  border-color: var(--teal-deep);
  background: rgba(47, 212, 196, .08);
}
.copy-btn[data-copied] {
  color: var(--ink-950);
  background: var(--teal);
  border-color: var(--teal);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px 24px;
  padding-top: 20px;
  font-size: 12.5px;
  color: var(--slate);
}

.footer-update { margin: 0; max-width: 48em; font-size: 12.5px; color: var(--slate); }

.footer-copy { margin: 0; font-size: 12.5px; color: var(--slate); }
.footer-copy .mono { color: #7C90A6; }

/* ============================================================
   通用内容组件
   ============================================================ */
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 20px);
}

.bento-tile {
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 32px);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.glass {
  background: rgba(22, 41, 61, .55);
  border: 1px solid rgba(143, 163, 184, .22);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  backdrop-filter: blur(12px) saturate(130%);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}
.glass:hover {
  transform: translateY(-2px);
  border-color: rgba(143, 163, 184, .42);
}

/* 面包屑 */
.breadcrumb { padding-top: 18px; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--slate);
}

.breadcrumb-item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb-item + .breadcrumb-item::before { content: "/"; color: var(--ink-700); }

.breadcrumb-link { color: var(--slate); }
.breadcrumb-link:hover { color: var(--teal); }

.breadcrumb-item[aria-current="page"] { color: var(--text-dark); }

/* 图片容器 */
.media {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-900));
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(rgba(143, 163, 184, .32) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: .35;
}

.media > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3  { aspect-ratio: 4 / 3; }
.media--1x1  { aspect-ratio: 1 / 1; }
.media--4x5  { aspect-ratio: 4 / 5; }
.media--21x9 { aspect-ratio: 21 / 9; }

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--slate);
}

/* 可展开组 */
.disclosure {
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  background: var(--ink-800);
  overflow: hidden;
}

.disclosure + .disclosure { margin-top: 10px; }

.disclosure summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  list-style: none;
}
.disclosure summary::-webkit-details-marker { display: none; }

.disclosure summary::before {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--teal);
}

.disclosure[open] { border-color: var(--teal-deep); box-shadow: inset 3px 0 0 var(--teal); }
.disclosure[open] summary::before { content: "–"; color: var(--signal); }

.disclosure-body {
  padding: 0 20px 18px;
  font-size: 14.5px;
  color: var(--text-muted);
}
.disclosure-body p { max-width: 44em; }

/* ---------- 显现动效 ---------- */
html[data-reveal="on"] .reveal {
  opacity: 0;
  transform: translateY(16px);
}
html[data-reveal="on"] .reveal[data-revealed] {
  opacity: 1;
  transform: none;
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: 0;
    overflow: hidden;
    padding-inline: var(--gutter);
    background: var(--ink-900);
    border-bottom: 1px solid transparent;
    transition: max-height .28s var(--ease), padding .28s var(--ease), border-color .28s var(--ease);
  }

  .site-header[data-open] .primary-nav {
    max-height: 520px;
    padding-block: 12px 20px;
    border-bottom-color: var(--ink-700);
    box-shadow: 0 24px 48px rgba(4, 10, 18, .55);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
  }

  .nav-link {
    display: flex;
    align-items: baseline;
    justify-content: flex-start;
    gap: 10px;
    padding: 13px 0;
    font-size: 15px;
    color: #D3DFEB;
    border-bottom: 1px solid rgba(34, 64, 90, .7);
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] { color: var(--teal); }
  .nav-link[aria-current="page"] .nav-index { color: var(--signal); }

  .header-actions { margin-left: 0; }
  .header-actions .btn--ghost { display: none; }
}

@media (max-width: 900px) {
  .footer-body {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-contact {
    padding-left: 0;
    padding-top: 24px;
    border-left: 0;
    border-top: 1px solid var(--ink-700);
  }
}

@media (max-width: 720px) {
  :root { --header-h: 66px; --header-h-compact: 56px; }

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

  .footer-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .brand-sub { display: none; }
  .nav-toggle-label { display: none; }
  .header-actions .btn--primary { padding: 8px 12px; font-size: 12px; }
  .contact-label { min-width: 0; }
}

/* ---------- 可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  html[data-reveal="on"] .reveal {
    opacity: 1;
    transform: none;
  }
}