/* ========== 1. RESET ========== */
*,
*::before,
*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, p, ul, ol, dl, 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; padding: 0; cursor: pointer; }
img, svg, video { display: block; max-width: 100%; height: auto; }
table { border-collapse: collapse; width: 100%; }
input, textarea { font: inherit; }

/* ========== 2. 变量 ========== */
:root {
  --ink: #07131F;
  --ink-deep: #0B1B2B;
  --paper: #F6F1E7;
  --paper-warm: #E9E1D3;
  --amber: #C9974A;
  --amber-soft: #E7C98B;
  --cinnabar: #B43A32;
  --celadon: #4F7C6A;
  --mist: #8696A8;
  --wire: #2C455C;
  --glass: rgba(18, 42, 64, 0.62);
  --wrap: 1240px;
  --pad: clamp(16px, 3.4vw, 40px);
  --t: 160ms;
  --font-display: "Songti SC", "STSong", "SimSun", "Noto Serif SC", Georgia, serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  --font-mono: "DIN Alternate", "Roboto Condensed", "Helvetica Neue", Arial, sans-serif;
}

/* ========== 3. 中文排版 ========== */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.015em;
}
h1 { font-size: clamp(2.6rem, 7vw, 5.5rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 1.9vw, 1.4rem); line-height: 1.4; }
h4 { font-size: 1.05rem; line-height: 1.5; }
p { line-height: 1.8; }
strong { font-weight: 600; }
:focus-visible {
  outline: 2px solid var(--amber-soft);
  outline-offset: 3px;
}

/* ========== 4. 跳转链接 ========== */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  padding: 12px 20px;
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  transform: translateY(-130%);
  transition: transform var(--t) ease;
}
.skip-link:focus { transform: translateY(0); }

/* ========== 5. 头部 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(7, 19, 31, 0.97), rgba(11, 27, 43, 0.93));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(201, 151, 74, 0.32);
}
.header-rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 7px var(--pad);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  border-bottom: 1px solid rgba(44, 69, 92, 0.55);
}
.utility-note { color: var(--mist); white-space: nowrap; }
.rail-coord { color: var(--wire); letter-spacing: 0.2em; white-space: nowrap; }
.rail-link {
  color: var(--amber-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color var(--t) ease, border-color var(--t) ease;
}
.rail-link:hover { color: var(--amber); border-bottom-color: var(--amber); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 13px var(--pad);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 0 1 auto;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border: 1px solid var(--amber);
  color: var(--amber);
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1;
  background: radial-gradient(circle at 30% 20%, rgba(201, 151, 74, 0.2), transparent 72%);
  transition: background var(--t) ease, color var(--t) ease;
}
.brand:hover .brand-mark { background: var(--amber); color: var(--ink); }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.brand-line {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.06em;
  color: var(--paper);
  white-space: nowrap;
}
.brand-tagline {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--mist);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid var(--wire);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  transition: border-color var(--t) ease, color var(--t) ease;
}
.nav-toggle:hover { border-color: var(--amber); color: var(--amber-soft); }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: var(--amber);
  transition: background var(--t) ease;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: var(--amber);
  transition: transform var(--t) ease;
}
.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle-label { line-height: 1; }

.cmd-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-width: 0;
}
.cmd-list {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.5vw, 20px);
}
.cmd-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 6px 2px 9px;
  color: var(--paper);
  opacity: 0.8;
  transition: color var(--t) ease, opacity var(--t) ease;
}
.cmd-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--amber);
  opacity: 0.72;
  transition: opacity var(--t) ease;
}
.cmd-label { font-size: 13px; letter-spacing: 0.06em; white-space: nowrap; }
.cmd-item::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t) ease;
}
.cmd-item:hover { opacity: 1; color: var(--amber-soft); }
.cmd-item:hover::after { transform: scaleX(1); }
.cmd-item[aria-current="page"] { opacity: 1; color: var(--amber-soft); }
.cmd-item[aria-current="page"]::after { transform: scaleX(1); }
.cmd-item[aria-current="page"] .cmd-index { opacity: 1; color: var(--amber-soft); }

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--amber);
  color: var(--amber-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  white-space: nowrap;
  transition: background var(--t) ease, color var(--t) ease;
}
.header-cta:hover { background: var(--amber); color: var(--ink); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(44, 69, 92, 0.45);
  pointer-events: none;
}
.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--amber), var(--amber-soft));
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* ========== 6. 页脚 ========== */
.site-footer {
  position: relative;
  background: var(--ink-deep);
  color: var(--paper);
  border-top: 1px solid var(--wire);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(44, 69, 92, 0.4) 1px, transparent 1px),
    linear-gradient(180deg, rgba(44, 69, 92, 0.24) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 72%);
  opacity: 0.55;
}
.footer-coords {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px var(--pad);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--wire);
  border-bottom: 1px solid rgba(44, 69, 92, 0.5);
}
.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 1.2fr;
  gap: clamp(24px, 4vw, 56px);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 64px) var(--pad);
}
.footer-brand { min-width: 0; }
.footer-brandline {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  letter-spacing: 0.04em;
  color: var(--paper);
}
.footer-summary {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}
.footer-hours {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber-soft);
}
.dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(79, 124, 106, 0.18);
}
.footer-col { min-width: 0; }
.footer-heading {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  color: var(--amber);
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(44, 69, 92, 0.75);
}
.footer-list { margin-top: 14px; display: flex; flex-direction: column; gap: 9px; }
.footer-list a {
  display: inline-block;
  font-size: 14px;
  color: rgba(246, 241, 231, 0.82);
  border-bottom: 1px solid transparent;
  transition: color var(--t) ease, border-color var(--t) ease;
}
.footer-list a:hover { color: var(--amber-soft); border-bottom-color: var(--amber); }
.footer-list--contact { gap: 14px; }
.contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 10px;
  font-size: 14px;
}
.contact-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--wire);
  text-transform: uppercase;
}
.contact-val {
  flex: 1 1 auto;
  min-width: 0;
  color: rgba(246, 241, 231, 0.86);
  overflow-wrap: anywhere;
}
.copy-btn {
  flex: 0 0 auto;
  padding: 2px 7px;
  border: 1px solid rgba(201, 151, 74, 0.45);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  transition: background var(--t) ease, color var(--t) ease, border-color var(--t) ease;
}
.copy-btn:hover { background: var(--amber); color: var(--ink); border-color: var(--amber); }
.copy-btn[data-copied="true"] { border-color: var(--celadon); color: var(--celadon); background: transparent; }
.copy-btn[data-copied="false"] { border-color: var(--cinnabar); color: var(--cinnabar); background: transparent; }
.footer-bottom {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 16px var(--pad) 26px;
  border-top: 1px solid rgba(44, 69, 92, 0.55);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}
.footer-copy { color: var(--mist); }
.footer-legal { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-legal a {
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color var(--t) ease, border-color var(--t) ease;
}
.footer-legal a:hover { color: var(--amber-soft); border-bottom-color: var(--amber); }
.footer-record { color: var(--wire); letter-spacing: 0.1em; }

/* ========== 7. 布局工具 ========== */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: var(--pad);
}
.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(26px, 4vw, 48px); }
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }
.rule { height: 1px; background: var(--wire); border: 0; margin: 0; }
.surface-paper { background: var(--paper); color: var(--ink); }
.surface-paper h1, .surface-paper h2, .surface-paper h3, .surface-paper h4 { color: var(--ink); }

/* ========== 8. 文本组件 ========== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--amber);
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--amber); }
.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber-soft);
}
.lede {
  max-width: 56ch;
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.9;
  color: rgba(246, 241, 231, 0.78);
}
.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* ========== 9. 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--amber);
  background: transparent;
  color: var(--amber-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: background var(--t) ease, color var(--t) ease, border-color var(--t) ease;
}
.btn:hover { background: var(--amber); color: var(--ink); }
.btn--solid { background: var(--amber); color: var(--ink); }
.btn--solid:hover { background: var(--amber-soft); border-color: var(--amber-soft); color: var(--ink); }
.btn--ghost { border-color: var(--wire); color: var(--paper); }
.btn--ghost:hover { background: transparent; border-color: var(--amber); color: var(--amber-soft); }
.btn--quiet {
  padding: 0 0 4px;
  border: 0;
  border-bottom: 1px solid var(--amber);
  color: var(--amber);
}
.btn--quiet:hover { background: transparent; color: var(--amber-soft); border-bottom-color: var(--amber-soft); }

/* ========== 10. 面包屑 ========== */
.breadcrumb {
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; margin-right: 8px; color: var(--wire); }
.breadcrumb a { color: var(--mist); transition: color var(--t) ease; }
.breadcrumb a:hover { color: var(--amber-soft); }
.breadcrumb [aria-current="page"] { color: var(--amber); }

/* ========== 11. 标签 ========== */
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--wire);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  transition: border-color var(--t) ease, color var(--t) ease;
}
.tag:hover { border-color: var(--amber); color: var(--amber-soft); }
.tag--amber { border-color: rgba(201, 151, 74, 0.6); color: var(--amber-soft); }
.tag--cinnabar { border-color: rgba(180, 58, 50, 0.65); color: #D97A72; }
.tag--celadon { border-color: rgba(79, 124, 106, 0.7); color: #8FBBA6; }

/* ========== 12. 资料卡 ========== */
.card {
  position: relative;
  padding: clamp(18px, 2vw, 24px);
  border: 1px solid var(--wire);
  background: rgba(11, 27, 43, 0.62);
  transition: border-color var(--t) ease, background var(--t) ease;
}
.card:hover { border-color: var(--amber); }
.card--glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-color: rgba(201, 151, 74, 0.35);
}
.card--paper {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper-warm);
}
.card--paper:hover { border-color: var(--amber); }
.card-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
}
.card-title {
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.4;
}
.card-body {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}
.card--paper .card-body { color: #4A5A68; }

/* ========== 13. 图片容器 ========== */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--wire);
  background:
    radial-gradient(circle at 70% 20%, rgba(201, 151, 74, 0.16), transparent 62%),
    linear-gradient(140deg, #0B1B2B, #07131F);
}
.media-frame img,
.media-frame picture,
.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame img {
  filter: saturate(0.9) brightness(0.9);
  transition: filter var(--t) ease;
}
.media-frame:hover img { filter: saturate(1.02) brightness(1.02); }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ========== 14. 响应式 ========== */
@media (max-width: 1100px) and (min-width: 961px) {
  .cmd-index { display: none; }
  .cmd-item { padding-bottom: 6px; }
  .brand-tagline { display: none; }
}

@media (max-width: 960px) {
  .header-inner { position: relative; flex-wrap: wrap; }
  .nav-toggle { display: inline-flex; }
  .cmd-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px var(--pad) 22px;
    background: rgba(7, 19, 31, 0.985);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--amber);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
  }
  .cmd-nav[data-open="true"] { display: flex; }
  .cmd-list { flex-direction: column; align-items: stretch; gap: 0; }
  .cmd-item {
    flex-direction: row;
    align-items: baseline;
    gap: 14px;
    padding: 14px 2px;
    border-bottom: 1px solid rgba(44, 69, 92, 0.5);
    opacity: 0.9;
  }
  .cmd-item::after { display: none; }
  .cmd-item[aria-current="page"] {
    border-bottom-color: var(--amber);
    color: var(--amber-soft);
  }
  .cmd-item[aria-current="page"] .cmd-index { color: var(--amber-soft); }
  .cmd-label { font-size: 15px; }
  .header-cta { margin-top: 18px; width: 100%; }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5 { grid-column: span 3; }
  .col-6, .col-7, .col-8 { grid-column: span 6; }
  .col-12 { grid-column: span 6; }

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

@media (max-width: 640px) {
  .header-rail { font-size: 10px; letter-spacing: 0.1em; gap: 10px; }
  .rail-coord { display: none; }
  .brand-mark { width: 36px; height: 36px; font-size: 17px; }
  .brand-line { font-size: 16px; }
  .brand-tagline { font-size: 9px; letter-spacing: 0.16em; }

  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: span 6; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-coords { font-size: 10px; letter-spacing: 0.1em; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
  .footer-legal { gap: 14px; }
  .contact-row { flex-wrap: wrap; }
}

/* ========== 15. 动效偏好 ========== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .scroll-progress-bar { transition: none !important; }
}

/* ========== 16. 打印 ========== */
@media print {
  .site-header, .site-footer, .skip-link, .scroll-progress { display: none !important; }
  body { background: #fff; color: #000; }
}