/* ==========================================================================
   牌乐门中国站 · /assets/site.css
   共享外壳：门框导航 / 门楣页脚 / 档案基础组件
   ========================================================================== */

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

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

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

ul, ol { list-style: none; }

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

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

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

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #1C1C1A;
  --paper: #F4EFE3;
  --paper-2: #E7DFCE;
  --deep: #123A2E;
  --deep-2: #0D2C22;
  --moss: #2F5D4A;
  --cinnabar: #B73A2E;
  --cinnabar-2: #8F2A20;
  --gold: #C9A227;
  --rock: #5A5F5B;
  --hl: #EFD9A0;
  --line: #9DB3A5;

  --line-soft: rgba(157, 179, 165, 0.38);
  --gold-soft: rgba(201, 162, 39, 0.36);
  --cream: rgba(244, 239, 227, 0.84);
  --cream-soft: rgba(244, 239, 227, 0.58);
  --hairline: rgba(244, 239, 227, 0.14);

  --font-head: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --radius-s: 6px;
  --radius-m: 10px;
  --radius-organic: 10px 14px 8px 12px;

  --shadow-1: 0 1px 0 rgba(28, 28, 26, 0.05), 0 10px 22px -16px rgba(18, 58, 46, 0.45);
  --shadow-2: 0 2px 0 rgba(28, 28, 26, 0.06), 0 20px 38px -22px rgba(18, 58, 46, 0.55);

  --wrap: 1240px;
  --gutter: 32px;
  --dock-h: 76px;
}

/* ---------- 3. 中文排版基础 ---------- */
body {
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(90, 95, 91, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 95, 91, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.25;
  color: var(--deep);
  letter-spacing: 0.01em;
}

h1 { font-size: 44px; font-weight: 900; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }
h4 { font-size: 19px; }

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

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

/* ---------- 4. 焦点与可访问性 ---------- */
:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(244, 239, 227, 0.9);
  border-radius: 3px;
}

.site-header :focus-visible,
.site-footer :focus-visible,
.mobile-dock :focus-visible {
  outline-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(13, 44, 34, 0.85);
}

.skip-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 10px 16px;
  background: var(--deep);
  color: var(--paper);
  border: 1px solid var(--gold);
  border-radius: var(--radius-s);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  transition: transform 0.2s ease;
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.wrap--narrow { max-width: 900px; }

.site-main { display: block; }

.section { padding: 96px 0; }
.section--tight { padding: 60px 0; }
.section--wide { padding: 128px 0; }
.section--narrow { max-width: 860px; margin: 0 auto; }

.section--deep { background: var(--deep); color: var(--cream); }
.section--deep h2, .section--deep h3, .section--deep h4 { color: var(--paper); }

.section--moss { background: var(--moss); color: var(--cream); }
.section--moss h2, .section--moss h3 { color: var(--paper); }

.section--archive { background: var(--paper-2); }

.section--inset {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: var(--paper-2);
  padding: 48px;
}

/* ---------- 6. 分栏 ---------- */
.split {
  display: grid;
  gap: clamp(30px, 6vw, 72px);
  align-items: start;
}

.split--7-5 { grid-template-columns: 7fr 5fr; }
.split--5-4 { grid-template-columns: 5fr 4fr; }
.split--4-5 { grid-template-columns: 4fr 5fr; }
.split--top { align-items: start; }
.split--center { align-items: center; }

.stagger { display: grid; gap: 22px; }

/* ---------- 7. 章节标记与文字 ---------- */
.section-marker {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.section-marker__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.section-marker__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--rock);
  text-transform: uppercase;
}

.section-marker__line {
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0));
}

.section--deep .section-marker__label,
.section--moss .section-marker__label { color: var(--cream-soft); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--rock);
  text-transform: uppercase;
}

.lead {
  font-size: 19px;
  line-height: 1.7;
  color: var(--rock);
  max-width: 46ch;
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-head { padding: 56px 0 8px; }
.page-head__title { font-size: 44px; font-weight: 900; }
.page-head__sub { margin-top: 14px; font-size: 17px; color: var(--rock); max-width: 52ch; }

.divider {
  height: 1px;
  margin: 32px 0;
  background: linear-gradient(90deg, var(--gold-soft), rgba(201, 162, 39, 0));
}

.note {
  border-left: 3px solid var(--gold);
  background: var(--paper-2);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  padding: 14px 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 8. 正文排版 ---------- */
.prose { max-width: 70ch; }
.prose h2 { margin: 2.2em 0 0.7em; font-size: 28px; }
.prose h3 { margin: 1.8em 0 0.6em; font-size: 22px; }
.prose p { margin-bottom: 1.2em; }
.prose ul, .prose ol { margin: 0 0 1.3em; }
.prose ul li { position: relative; padding-left: 20px; margin-bottom: 0.55em; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 7px;
  height: 7px;
  background: var(--gold);
  border-radius: 2px 4px 2px 3px;
}
.prose ol { padding-left: 1.4em; list-style: decimal; }
.prose ol li { margin-bottom: 0.55em; }
.prose ol li::marker { color: var(--cinnabar); font-family: var(--font-mono); }
.prose a {
  color: var(--cinnabar);
  border-bottom: 1px solid rgba(183, 58, 46, 0.42);
  transition: background-color 0.18s ease, border-color 0.18s ease;
}
.prose a:hover { background: rgba(183, 58, 46, 0.07); border-bottom-color: var(--cinnabar); }
.prose blockquote {
  border-left: 3px solid var(--gold);
  padding: 4px 0 4px 20px;
  margin: 0 0 1.3em;
  color: var(--rock);
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--paper-2);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: 1px 6px;
}

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease,
    border-color 0.18s ease, box-shadow 0.18s ease;
}

.btn--primary {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #FBF6EC;
}
.btn--primary:hover {
  background: var(--cinnabar-2);
  border-color: var(--cinnabar-2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(244, 239, 227, 0.34);
  color: var(--paper);
}
.btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
}

.btn--quiet {
  background: var(--paper-2);
  border-color: var(--line-soft);
  color: var(--deep);
}
.btn--quiet:hover {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
  transform: translateY(-2px);
}

.btn--block { width: 100%; }
.btn--sm { padding: 8px 14px; font-size: 13.5px; }

/* ---------- 10. 标签与铭牌 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 4px 8px 5px 7px;
  background: var(--paper-2);
  color: var(--deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.tag--gold {
  background: rgba(201, 162, 39, 0.15);
  border-color: var(--gold-soft);
  color: #7E6410;
}

.tag--red {
  background: rgba(183, 58, 46, 0.1);
  border-color: rgba(183, 58, 46, 0.38);
  color: var(--cinnabar);
}

.tag--deep {
  background: rgba(244, 239, 227, 0.08);
  border-color: rgba(244, 239, 227, 0.26);
  color: var(--cream);
}

.plaque {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--gold-soft);
  border-radius: var(--radius-s);
  background: rgba(201, 162, 39, 0.08);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: #7E6410;
  text-transform: uppercase;
}

/* ---------- 11. 卡片 ---------- */
.card {
  position: relative;
  padding: 26px 24px;
  background: var(--paper-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-organic);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translate(-2px, -4px);
  box-shadow: var(--shadow-2);
  border-color: var(--gold-soft);
}

.card--archive {
  background: var(--paper);
  border-left: 4px solid var(--gold);
}

.card--deep {
  background: var(--deep);
  border-color: rgba(244, 239, 227, 0.16);
  color: var(--cream);
}

.card__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--deep);
  margin-bottom: 10px;
}

.card--deep .card__title { color: var(--paper); }

.card__text { font-size: 15.5px; line-height: 1.7; color: var(--rock); }
.card--deep .card__text { color: var(--cream-soft); }

.card__meta {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--gold);
}

/* ---------- 12. 折叠面板 ---------- */
.fold {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: var(--paper-2);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.fold:hover { border-color: var(--gold-soft); }

.fold__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--deep);
}

.fold__head::-webkit-details-marker { display: none; }
.fold__head::marker { content: ""; }

.fold__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cinnabar);
}

.fold[open] .fold__head {
  border-bottom: 1px solid var(--line-soft);
  color: var(--cinnabar);
}
.fold[open] .fold__head::after { content: "\2013"; }

.fold__body {
  padding: 16px 20px 20px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--rock);
}
.fold__body p { margin-bottom: 0.9em; }
.fold__body p:last-child { margin-bottom: 0; }

/* ---------- 13. 时间轴 ---------- */
.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--line-soft));
}

.timeline__item {
  position: relative;
  padding-bottom: 30px;
}
.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px var(--paper), 0 0 0 4px var(--gold-soft);
}

.section--deep .timeline__item::before { box-shadow: 0 0 0 3px var(--deep), 0 0 0 4px var(--gold-soft); }

.timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.timeline__title {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  color: var(--deep);
  margin: 3px 0 6px;
}

.section--deep .timeline__title { color: var(--paper); }

.timeline__text { font-size: 15px; line-height: 1.7; color: var(--rock); }
.section--deep .timeline__text { color: var(--cream-soft); }

/* ---------- 14. 图片容器 ---------- */
.figure { margin: 0; }

.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--gold-soft);
  border-radius: var(--radius-organic);
  background-color: var(--deep);
  background-image: linear-gradient(135deg, rgba(18, 58, 46, 0.96), rgba(47, 93, 74, 0.82));
}

.figure__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(244, 239, 227, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 239, 227, 0.07) 1px, transparent 1px);
  background-size: 38px 38px;
}

.figure--portrait .figure__frame { aspect-ratio: 4 / 5; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }

.figure__box {
  position: absolute;
  left: 9%;
  right: 12%;
  top: 40%;
  height: 34%;
  pointer-events: none;
  border: 1px solid rgba(239, 217, 160, 0.8);
  border-radius: var(--radius-s);
  background: rgba(239, 217, 160, 0.1);
}

.figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--rock);
}

/* ---------- 15. 检索与高亮 ---------- */
.search-demo {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: var(--paper-2);
}

.search-demo__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--rock);
}

.search-demo__body { padding-top: 16px; font-size: 15.5px; color: var(--ink); }

.hl,
mark.hl {
  background: var(--hl);
  color: var(--ink);
  padding: 1px 3px;
  border-radius: 3px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

/* ---------- 16. 面包屑 ---------- */
.breadcrumb { margin-top: 20px; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--rock);
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item::after {
  content: "/";
  color: var(--line);
}

.breadcrumb__item:last-child::after { content: ""; }

.breadcrumb__link {
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.breadcrumb__link:hover { color: var(--cinnabar); border-bottom-color: var(--cinnabar); }

.breadcrumb__current { color: var(--deep); }

/* ---------- 17. 页头（门框导航） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--deep);
  color: var(--paper);
  border-bottom: 1px solid var(--gold-soft);
  box-shadow: 0 12px 28px -24px rgba(13, 44, 34, 0.9);
}

.site-header::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0.22) 45%, var(--gold));
}

.site-header__frame {
  max-width: var(--wrap);
  margin: 0 auto;
  min-height: 78px;
  padding: 12px var(--gutter);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  border-left: 1px solid var(--hairline);
  border-right: 1px solid var(--hairline);
}

/* 品牌门牌 */
.brand { min-width: 0; }

.brand__plate {
  display: flex;
  align-items: center;
  gap: 12px;
  transition: transform 0.18s ease;
}
.brand__plate:hover { transform: translateY(-2px); }

.brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border: 1px solid var(--gold);
  border-radius: 9px 12px 7px 11px;
  background: rgba(244, 239, 227, 0.05);
  color: var(--gold);
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  line-height: 1;
}

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

.brand__name {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--paper);
  white-space: nowrap;
}

.brand__meta {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--cream-soft);
  white-space: nowrap;
}

.brand__plate--footer .brand__mark { border-color: var(--gold-soft); }

/* 栏目导航 */
.site-nav {
  display: flex;
  justify-content: center;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  counter-reset: nav;
}

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 11px;
  border-radius: var(--radius-s);
  font-size: 14.5px;
  line-height: 1.4;
  color: var(--cream);
  transition: color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.nav-link::before {
  content: counter(nav, decimal-leading-zero);
  counter-increment: nav;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--gold);
  opacity: 0.62;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 3px;
  height: 2px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}

.nav-link:hover {
  color: #FFFFFF;
  background: rgba(244, 239, 227, 0.07);
  transform: translateY(-2px);
}
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: #FFFFFF;
  background: rgba(244, 239, 227, 0.05);
}
.nav-link[aria-current="page"]::before { opacity: 1; }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

/* 右侧工具 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
}

.search-field {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 250px;
  padding: 9px 12px;
  border: 1px solid rgba(244, 239, 227, 0.22);
  border-radius: var(--radius-s);
  background: rgba(13, 44, 34, 0.55);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--cream-soft);
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.search-field::before {
  content: "/";
  color: var(--gold);
  font-weight: 600;
}

.search-field:hover {
  border-color: var(--cinnabar);
  background: rgba(13, 44, 34, 0.88);
  color: var(--paper);
  transform: translateY(-2px);
}

.search-field__hint { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-field__short { display: none; }

.header-tools__cta { white-space: nowrap; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 12px;
  border: 1px solid rgba(244, 239, 227, 0.28);
  border-radius: var(--radius-s);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.nav-toggle:hover { border-color: var(--gold); color: var(--gold); }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  width: 18px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--cinnabar);
  background: rgba(183, 58, 46, 0.16);
  color: #FFFFFF;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 移动端底部常驻栏 */
.mobile-dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px));
  background: rgba(13, 44, 34, 0.97);
  border-top: 1px solid var(--gold-soft);
}

.mobile-dock .btn--block { flex: 1 1 auto; width: auto; }

.mobile-dock__link {
  flex: 0 0 auto;
  padding: 10px 14px;
  border: 1px solid rgba(244, 239, 227, 0.28);
  border-radius: var(--radius-s);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cream);
  transition: border-color 0.18s ease, color 0.18s ease;
}
.mobile-dock__link:hover { border-color: var(--gold); color: var(--gold); }

/* ---------- 18. 页脚（门槛） ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  background-color: var(--deep);
  background-image:
    linear-gradient(rgba(244, 239, 227, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 239, 227, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--paper);
  border-top: 3px solid var(--gold);
}

.site-footer__frame {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px var(--gutter) 28px;
  border-left: 1px solid var(--hairline);
  border-right: 1px solid var(--hairline);
}

.site-footer__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 20px 48px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--hairline);
}

.site-footer__intro {
  font-size: 16.5px;
  line-height: 1.7;
  color: var(--cream);
  max-width: 52ch;
}

.site-footer__body {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1fr 1.4fr;
  gap: 34px;
  padding: 40px 0 34px;
}

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

.footer-col__title {
  position: relative;
  margin-bottom: 16px;
  padding-bottom: 9px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.footer-col__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 26px;
  height: 2px;
  background: var(--gold);
}

.footer-links { display: grid; gap: 9px; }

.footer-link {
  display: inline-block;
  font-size: 15px;
  color: var(--cream);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.footer-link:hover {
  color: var(--gold);
  border-bottom-color: var(--gold-soft);
  transform: translateX(3px);
}

.footer-links--contact { gap: 10px; }

.footer-mono {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.footer-text {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cream-soft);
}

.footer-col--contact .btn { margin-top: 16px; }

.site-footer__note {
  padding: 22px 0;
  border-top: 1px solid rgba(244, 239, 227, 0.1);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--cream-soft);
  max-width: 72ch;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(244, 239, 227, 0.1);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: rgba(244, 239, 227, 0.55);
}

.site-footer__legal-item--mono { margin-left: auto; color: var(--gold); }

/* ---------- 19. 滚动进度与显现 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  pointer-events: none;
  background: transparent;
}

.scroll-progress__bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cinnabar), var(--gold));
  transition: width 0.12s linear;
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1120px) {
  .search-field { min-width: 0; }
  .search-field__hint { display: none; }
  .search-field__short { display: inline; }
  .nav-link { padding: 10px 9px; font-size: 14px; }
}

@media (max-width: 900px) {
  :root { --gutter: 24px; }

  body { font-size: 16px; padding-bottom: var(--dock-h); }

  h1 { font-size: 32px; }
  h2 { font-size: 26px; }
  h3 { font-size: 21px; }
  h4 { font-size: 17px; }
  .page-head__title { font-size: 32px; }
  .lead { font-size: 17px; }

  .section { padding: 64px 0; }
  .section--tight { padding: 44px 0; }
  .section--wide { padding: 80px 0; }
  .section--inset { padding: 28px; }

  .split,
  .split--7-5,
  .split--5-4,
  .split--4-5 { grid-template-columns: 1fr; }

  .stagger { gap: 18px; }

  .site-header__frame {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 68px;
    padding: 10px var(--gutter);
  }

  .brand { order: 1; flex: 1 1 auto; min-width: 0; }
  .header-tools { order: 2; flex: 0 0 auto; gap: 8px; }
  .nav-toggle { order: 3; flex: 0 0 auto; display: inline-flex; }
  .header-tools__cta { display: none; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    background: var(--deep-2);
    border-top: 1px solid var(--gold-soft);
    border-bottom: 1px solid var(--gold-soft);
    transition: max-height 0.3s ease, visibility 0.3s ease;
  }

  .site-nav[data-open] {
    max-height: 78vh;
    overflow-y: auto;
    visibility: visible;
  }

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

  .nav-link {
    justify-content: flex-start;
    padding: 14px var(--gutter);
    border-bottom: 1px solid rgba(244, 239, 227, 0.08);
    border-radius: 0;
    font-size: 16px;
  }

  .nav-link::before { font-size: 11.5px; }

  .nav-link::after {
    top: 0;
    bottom: 0;
    left: 0;
    right: auto;
    width: 3px;
    height: 100%;
    transform: scaleY(0);
    transform-origin: top center;
  }

  .nav-link:hover,
  .nav-link[aria-current="page"] { background: rgba(244, 239, 227, 0.06); transform: none; }
  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after { transform: scaleY(1); }

  .mobile-dock { display: flex; }

  .site-footer { margin-top: 64px; }
  .site-footer__frame { padding: 44px var(--gutter) 24px; }
  .site-footer__head { grid-template-columns: 1fr; gap: 18px; }
  .site-footer__body { grid-template-columns: 1fr 1fr; gap: 28px; padding: 32px 0 26px; }
  .site-footer__legal-item--mono { margin-left: 0; }
}

@media (max-width: 560px) {
  :root { --gutter: 18px; }

  h1, .page-head__title { font-size: 28px; }

  .brand__mark { width: 36px; height: 36px; font-size: 17px; }
  .brand__meta { display: none; }
  .brand__name { font-size: 16px; }
  .nav-toggle__label { display: none; }

  .site-footer__body { grid-template-columns: 1fr; }
  .note { padding: 12px 14px; }
  .card { padding: 20px 18px; }
}

@media (max-width: 400px) {
  .search-field { display: none; }
}

/* ---------- 21. 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }

  html.js [data-reveal],
  html.js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .site-nav { transition: none !important; }
  .scroll-progress__bar { transition: none; }

  .card:hover,
  .nav-link:hover,
  .brand__plate:hover,
  .btn:hover,
  .search-field:hover,
  .footer-link:hover {
    transform: none;
  }
}