/* ============================================================
   博亚官网 · 共享站点样式 /assets/site.css
   reset · 变量 · 中文排版 · 页头 · 页脚 · 通用组件
   ============================================================ */

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

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

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

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

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

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

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

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

:root {
  /* ---- 色板 ---- */
  --ink: #0B0F0E;
  --deep: #10231C;
  --tier: #17362B;
  --lime: #C6F94A;
  --orange: #FF6A2B;
  --paper: #F4F6F2;
  --mist: #8FA39A;
  --scale: #2A3A34;
  --amber: #E8B33C;
  --teal: #1E7A6B;

  /* ---- 字体 ---- */
  --font-head: "Archivo Narrow", "Oswald", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Roboto Mono", Consolas, "Courier New", monospace;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  /* ---- 尺度 ---- */
  --maxw: 1280px;
  --rail-w: 218px;
  --gut: 22px;
  --gap: 24px;
  --radius: 2px;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------------- 基础排版 ---------------- */

html { scroll-behavior: smooth; }

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -.005em;
}

p { max-width: 72ch; }

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

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* ---------------- 跳转链接 ---------------- */

.skip-link {
  position: fixed;
  left: 16px;
  top: -90px;
  z-index: 200;
  padding: 11px 18px;
  background: var(--lime);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: .08em;
  border: 1px solid var(--lime);
  transition: top 140ms var(--ease);
}

.skip-link:focus { top: 16px; }

/* ---------------- 页头 ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink);
  color: var(--paper);
}

.header-frame {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  border: 1px solid var(--scale);
  border-top: 0;
}

.header-rail {
  background: var(--deep);
  border-right: 1px solid var(--scale);
  box-shadow: inset 3px 0 0 var(--lime);
  padding: 18px 18px 20px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
}

.rail-kicker {
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
  line-height: 1.6;
}

.rail-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  line-height: 1.5;
  color: var(--lime);
  margin-bottom: 12px;
  letter-spacing: .02em;
}

.rail-value--muted { color: var(--paper); }

.header-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.header-top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--scale);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-right: auto;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 23px;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.1;
  color: var(--paper);
}

.brand-subline {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mist);
  line-height: 1.4;
}

.header-quick {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.quick-link {
  display: inline-block;
  padding: 6px 12px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mist);
  border: 1px solid var(--scale);
  transition: color 120ms var(--ease), background-color 120ms var(--ease), border-color 120ms var(--ease);
}

.quick-link:hover,
.quick-link:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.quick-contact {
  display: inline-block;
  padding: 6px 12px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--orange);
  border: 1px solid var(--orange);
  transition: color 120ms var(--ease), background-color 120ms var(--ease);
}

.quick-contact:hover,
.quick-contact:focus-visible {
  background: var(--orange);
  color: var(--ink);
}

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--scale);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--paper);
  transition: border-color 120ms var(--ease), color 120ms var(--ease);
}

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

.nav-toggle-bars {
  position: relative;
  width: 16px;
  height: 10px;
  display: block;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: currentColor;
}

.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }

/* 导航 */
.primary-nav { padding: 0 22px; }

.nav-list { display: flex; flex-wrap: wrap; gap: 2px; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 14px 16px 16px;
  font-size: 14px;
  letter-spacing: .07em;
  color: var(--paper);
  transition: color 120ms var(--ease), background-color 120ms var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 10px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 120ms var(--ease);
}

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

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

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

/* 滚动进度 */
.scroll-progress {
  height: 2px;
  width: 100%;
  background: var(--scale);
  overflow: hidden;
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--lime) 0%, var(--orange) 100%);
  transition: width 90ms linear;
}

/* ---------------- 页脚 ---------------- */

.site-footer {
  margin-top: 0;
  background: var(--deep);
  color: var(--paper);
  border-top: 1px solid var(--scale);
}

.footer-frame {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 60px var(--gut) 44px;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 40px 24px;
  border-left: 1px solid var(--scale);
  border-right: 1px solid var(--scale);
}

.footer-brand { grid-column: 1 / span 4; }

.footer-brand-name {
  font-family: var(--font-head);
  font-size: 30px;
  font-weight: 600;
  letter-spacing: .03em;
  line-height: 1.1;
}

.footer-brand-sub {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--lime);
  text-transform: uppercase;
}

.footer-season-note {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 34ch;
}

.footer-cols {
  grid-column: 5 / span 4;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 20px;
}

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

.footer-col-title {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
  padding-bottom: 9px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--scale);
}

.footer-list li + li { margin-top: 10px; }

.footer-list a {
  font-size: 14px;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.footer-list a:hover,
.footer-list a:focus-visible { color: var(--lime); border-bottom-color: var(--lime); }

.footer-contact {
  grid-column: 9 / span 4;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.footer-contact-key {
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.footer-contact-value {
  font-size: 14px;
  color: var(--paper);
  line-height: 1.7;
}

.copy-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--scale);
  background: transparent;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  letter-spacing: .01em;
  color: var(--paper);
  text-align: left;
  transition: border-color 120ms var(--ease), background-color 120ms var(--ease), color 120ms var(--ease);
}

.copy-btn:hover,
.copy-btn:focus-visible { border-color: var(--lime); color: var(--lime); }

.copy-btn[data-copied] {
  border-color: var(--teal);
  color: var(--lime);
  background: rgba(30, 122, 107, .18);
}

.copy-btn-value {
  overflow-wrap: anywhere;
  min-width: 0;
}

.copy-btn-flag {
  flex: none;
  font-family: var(--font-body);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
  transition: color 120ms var(--ease);
}

.copy-btn[data-copied] .copy-btn-flag { color: var(--lime); }

.footer-contact-note {
  font-size: 12px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 34ch;
  padding-top: 12px;
  border-top: 1px solid var(--scale);
}

.footer-legal {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px var(--gut) 42px;
  border-top: 1px solid var(--scale);
  border-left: 1px solid var(--scale);
  border-right: 1px solid var(--scale);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  font-size: 12.5px;
  color: var(--mist);
}

.footer-legal-copy,
.footer-legal-icp { font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; }

.footer-legal-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-left: auto; }

.footer-legal-links a {
  border-bottom: 1px solid var(--scale);
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.footer-legal-links a:hover,
.footer-legal-links a:focus-visible { color: var(--lime); border-bottom-color: var(--lime); }

/* ---------------- 通用布局 ---------------- */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.grid { display: grid; gap: var(--gap); }

.grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* ---------------- 章节标题 ---------------- */

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 30px;
}

.section-kicker {
  font-size: 11.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0;
}

.section-title {
  font-size: clamp(28px, 3.6vw, 46px);
  font-weight: 600;
  letter-spacing: -.01em;
  line-height: 1.05;
  margin: 0;
  max-width: 22ch;
}

/* ---------------- 按钮 ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--paper);
  background: transparent;
  color: var(--paper);
  font-size: 13.5px;
  letter-spacing: .08em;
  line-height: 1.2;
  transition: background-color 120ms var(--ease), color 120ms var(--ease), border-color 120ms var(--ease);
}

.btn:hover,
.btn:focus-visible { background: var(--lime); border-color: var(--lime); color: var(--ink); }

.btn--solid { background: var(--lime); border-color: var(--lime); color: var(--ink); }

.btn--solid:hover,
.btn--solid:focus-visible { background: var(--paper); border-color: var(--paper); color: var(--ink); }

.btn--ghost { border-color: var(--scale); color: var(--mist); }

.btn--ghost:hover,
.btn--ghost:focus-visible { background: transparent; border-color: var(--orange); color: var(--orange); }

/* ---------------- 面包屑 ---------------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.breadcrumb li { display: flex; align-items: center; gap: 8px; }

.breadcrumb li + li::before { content: "/"; color: var(--scale); }

.breadcrumb a { transition: color 120ms var(--ease); }

.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--lime); }

/* ---------------- 印刷标签 ---------------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--scale);
  background: var(--paper);
  color: var(--ink);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  line-height: 1.5;
  white-space: nowrap;
}

.tag--lime { background: var(--lime); border-color: var(--lime); color: var(--ink); }
.tag--orange { background: var(--orange); border-color: var(--orange); color: var(--ink); }
.tag--amber { background: var(--amber); border-color: var(--amber); color: var(--ink); }
.tag--outline { background: transparent; border-color: var(--lime); color: var(--lime); }

/* ---------------- 等宽数字 ---------------- */

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
}

/* ---------------- 数据行与时间轴节点 ---------------- */

.data-row {
  position: relative;
  display: grid;
  align-items: center;
  padding: 13px 16px 13px 18px;
  border-bottom: 1px solid var(--scale);
  transition: background-color 120ms var(--ease);
}

.data-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background-color 120ms var(--ease);
}

.data-row:hover,
.data-row:focus-within { background: var(--deep); }

.data-row:hover::before,
.data-row:focus-within::before { background: var(--lime); }

.node {
  position: relative;
  padding-left: 22px;
}

.node::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 9px;
  height: 9px;
  border: 1px solid var(--lime);
  background: var(--ink);
}

.node[data-state="current"]::before { background: var(--orange); border-color: var(--orange); }

.node[data-state="pending"]::before { background: var(--amber); border-color: var(--amber); }

/* ---------------- 图片容器 ---------------- */

.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--tier);
  border: 1px solid var(--scale);
  aspect-ratio: 16 / 9;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.55) contrast(1.06);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 15, 14, 0) 42%, rgba(11, 15, 14, .62) 100%);
}

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

.media-caption {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--mist);
  line-height: 1.6;
}

/* ---------------- 无障碍工具类 ---------------- */

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

/* ---------------- 响应式：平板 ---------------- */

@media (max-width: 1100px) {
  .footer-brand { grid-column: 1 / span 6; }
  .footer-cols { grid-column: 7 / span 6; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-contact { grid-column: 1 / span 12; flex-direction: row; flex-wrap: wrap; gap: 18px 32px; }
  .footer-contact-item { flex: 1 1 220px; }
  .footer-contact-note { flex: 1 1 100%; max-width: 60ch; }
}

/* ---------------- 响应式：移动导航与页脚 ---------------- */

@media (max-width: 900px) {
  .header-frame { grid-template-columns: minmax(0, 1fr); }

  .header-rail { display: none; }

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

  .header-top { padding: 14px 18px; }

  .brand-name { font-size: 20px; }

  .header-quick {
    flex-basis: 100%;
    order: 3;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--scale);
  }

  .quick-link,
  .quick-contact { font-size: 12px; padding: 5px 10px; }

  .primary-nav {
    display: none;
    padding: 0;
    border-top: 1px solid var(--scale);
  }

  .primary-nav[data-open] { display: block; }

  .nav-list { flex-direction: column; gap: 0; }

  .nav-link {
    display: block;
    padding: 15px 18px;
    border-top: 1px solid var(--scale);
    font-size: 14.5px;
  }

  .nav-link:first-child { border-top: 0; }

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

  .nav-link[aria-current="page"] {
    border-left: 3px solid var(--lime);
    padding-left: 15px;
    background: var(--deep);
  }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

  .footer-frame { padding: 46px 18px 34px; }

  .footer-brand { grid-column: 1 / span 12; }

  .footer-cols { grid-column: 1 / span 12; grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-contact { grid-column: 1 / span 12; }

  .footer-legal { padding: 18px 18px 36px; }

  .footer-legal-links { margin-left: 0; }
}

@media (max-width: 600px) {
  body { font-size: 15.5px; }

  .section-title { max-width: none; }

  .grid-12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 16px; }

  .footer-contact-item { flex: 1 1 100%; }

  .btn { padding: 11px 18px; font-size: 13px; }
}

/* ---------------- 减少动效 ---------------- */

@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;
  }
}