/* ==========================================================================
   盈佳国际 · 共享样式表  /assets/site.css
   设计基调：会发光的参数年鉴 —— 深墨蓝长卷 + 纸白资料块 + 琥珀金读数
   ========================================================================== */

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

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

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

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

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

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

/* ---------- 2. 设计令牌 ---------- */
:root {
  --yj-ink-900: #0B1B2B;
  --yj-ink-800: #12263A;
  --yj-ink-700: #1B3550;
  --yj-paper: #F4F1E9;
  --yj-amber: #D99A2B;
  --yj-amber-soft: #F2D9A0;
  --yj-orange: #FF6A2B;
  --yj-teal: #7FB7A6;
  --yj-mist: #8FA3B5;
  --yj-line: #3D5468;

  --yj-text-strong: #F4F1E9;
  --yj-text: rgba(244, 241, 233, 0.86);
  --yj-text-dim: rgba(143, 163, 181, 0.92);
  --yj-line-soft: rgba(61, 84, 104, 0.55);
  --yj-amber-veil: rgba(217, 154, 43, 0.12);

  --yj-font-display: "Archivo Narrow", "Arial Narrow", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --yj-font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --yj-font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --yj-container: 1280px;
  --yj-gutter: clamp(18px, 4vw, 56px);
  --yj-pill: 999px;
  --yj-ease: cubic-bezier(0.22, 0.72, 0.18, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--yj-ink-900);
  color: var(--yj-text);
  font-family: var(--yj-font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.9;
  letter-spacing: 0.01em;
  min-height: 100vh;
  overflow-x: clip;
}

.yj-main { display: block; position: relative; }

#main-content { display: block; scroll-margin-top: 112px; }

::selection { background: var(--yj-amber); color: var(--yj-ink-900); }

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

.yj-sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---------- 4. 跳转链接 ---------- */
.yj-skip {
  position: fixed;
  top: 12px;
  left: 50%;
  z-index: 90;
  transform: translate(-50%, -180%);
  padding: 10px 20px;
  background: var(--yj-amber);
  color: var(--yj-ink-900);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: var(--yj-pill);
  transition: transform 0.24s var(--yj-ease);
}

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

/* ---------- 5. 布局骨架 ---------- */
.yj-container {
  width: 100%;
  max-width: var(--yj-container);
  margin-inline: auto;
  padding-inline: var(--yj-gutter);
}

.yj-section {
  position: relative;
  padding-block: clamp(56px, 8vw, 112px);
}

.yj-section--tight { padding-block: clamp(32px, 5vw, 64px); }

.yj-band { position: relative; }

.yj-band--ink { background: var(--yj-ink-800); }

.yj-band--paper {
  background: var(--yj-paper);
  --yj-text-strong: #0B1B2B;
  --yj-text: rgba(11, 27, 43, 0.84);
  --yj-text-dim: rgba(27, 53, 80, 0.72);
  --yj-line-soft: rgba(61, 84, 104, 0.32);
  --yj-amber-veil: rgba(160, 110, 18, 0.14);
  box-shadow: inset 0 0 0 1px rgba(11, 27, 43, 0.08);
}

.yj-band--paper .yj-num,
.yj-band--paper .yj-stat__value,
.yj-band--paper .yj-price-card__value,
.yj-band--paper .yj-timeline__year { color: #9C6A12; }

.yj-band--paper .yj-tag {
  color: #2F6B5B;
  border-color: rgba(47, 107, 91, 0.4);
  background: rgba(127, 183, 166, 0.2);
}

.yj-band--paper .yj-note { color: rgba(27, 53, 80, 0.78); }

.yj-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.yj-col-3 { grid-column: span 3; }
.yj-col-4 { grid-column: span 4; }
.yj-col-5 { grid-column: span 5; }
.yj-col-6 { grid-column: span 6; }
.yj-col-7 { grid-column: span 7; }
.yj-col-8 { grid-column: span 8; }
.yj-col-9 { grid-column: span 9; }
.yj-col-12 { grid-column: span 12; }

.yj-stack { display: grid; gap: clamp(14px, 1.8vw, 24px); }

.yj-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.yj-rule {
  height: 1px;
  border: 0;
  background: var(--yj-line-soft);
}

/* ---------- 6. 文字层级 ---------- */
.yj-display,
.yj-h1,
.yj-h2,
.yj-h3,
.yj-h4 {
  font-family: var(--yj-font-display);
  color: var(--yj-text-strong);
}

.yj-display {
  font-weight: 300;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 0.98;
  letter-spacing: 0.015em;
  text-transform: uppercase;
}

.yj-h1 {
  font-weight: 300;
  font-size: clamp(2rem, 4.4vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
}

.yj-h2 {
  font-weight: 400;
  font-size: clamp(1.5rem, 2.6vw, 2.5rem);
  line-height: 1.14;
  letter-spacing: 0.01em;
}

.yj-h3 {
  font-weight: 500;
  font-size: 1.25rem;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.yj-h4 {
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.5;
  letter-spacing: 0.03em;
}

.yj-lede {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  line-height: 1.85;
  color: var(--yj-text);
}

.yj-body { max-width: 40em; }

.yj-body p + p { margin-top: 1em; }

.yj-eyebrow,
.yj-meta {
  font-family: var(--yj-font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--yj-mist);
}

.yj-index-num {
  display: block;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--yj-mist);
}

.yj-num {
  font-family: var(--yj-font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--yj-amber);
}

.yj-num--xl { font-size: clamp(2.25rem, 4.4vw, 2.75rem); line-height: 1; }
.yj-num--lg { font-size: 2rem; line-height: 1.05; }
.yj-num--md { font-size: 1.25rem; line-height: 1.2; }

.yj-sec-head { margin-bottom: clamp(24px, 3.4vw, 44px); }

.yj-sec-head__index {
  display: block;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--yj-mist);
  margin-bottom: 12px;
}

.yj-sec-head__title { max-width: 22em; }

.yj-sec-head__sub {
  margin-top: 14px;
  max-width: 38em;
  color: var(--yj-text);
}

/* ---------- 7. 按钮 / 标签 / 徽标 ---------- */
.yj-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72em 1.4em;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--yj-text-strong);
  background: transparent;
  border: 1px solid var(--yj-line);
  border-radius: var(--yj-pill);
  cursor: pointer;
  transition: border-color 0.28s var(--yj-ease),
              background-color 0.28s var(--yj-ease),
              color 0.28s var(--yj-ease),
              transform 0.18s var(--yj-ease);
}

.yj-btn:hover { border-color: var(--yj-amber); color: var(--yj-amber); }
.yj-btn:active { transform: translateY(2px); }

.yj-btn--cta {
  background: var(--yj-amber);
  border-color: var(--yj-amber);
  color: var(--yj-ink-900);
  font-weight: 600;
}

.yj-btn--cta:hover {
  background: var(--yj-amber-soft);
  border-color: var(--yj-amber-soft);
  color: var(--yj-ink-900);
}

.yj-btn--signal {
  background: var(--yj-orange);
  border-color: var(--yj-orange);
  color: #1A0C04;
  font-weight: 600;
}

.yj-btn--signal:hover {
  background: #FF824E;
  border-color: #FF824E;
  color: #1A0C04;
}

.yj-btn--ghost { border-color: var(--yj-line-soft); }

.yj-btn--sm { padding: 0.5em 1em; font-size: 0.8125rem; }

.yj-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--yj-text);
  background: transparent;
  border: 1px solid var(--yj-line-soft);
  border-radius: var(--yj-pill);
  cursor: pointer;
  transition: border-color 0.24s var(--yj-ease),
              color 0.24s var(--yj-ease),
              background-color 0.24s var(--yj-ease),
              transform 0.16s var(--yj-ease);
}

.yj-chip:hover { border-color: var(--yj-amber); color: var(--yj-amber); }

.yj-chip[aria-selected="true"],
.yj-chip.is-active {
  background: var(--yj-amber-veil);
  border-color: var(--yj-amber);
  color: var(--yj-amber);
  transform: translateY(2px);
}

.yj-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--yj-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yj-teal);
  background: rgba(127, 183, 166, 0.1);
  border: 1px solid rgba(127, 183, 166, 0.42);
  border-radius: 2px;
}

.yj-plate {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--yj-mist);
  background: rgba(11, 27, 43, 0.5);
  border: 1px solid var(--yj-line);
}

.yj-plate strong { color: var(--yj-amber); font-weight: 700; }

/* ---------- 8. 容器与旁注 ---------- */
.yj-card,
.yj-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 2.2vw, 28px);
  background: var(--yj-ink-800);
  border: 1px solid var(--yj-line-soft);
  transition: border-color 0.26s var(--yj-ease);
}

.yj-card:hover { border-color: var(--yj-amber); }

.yj-panel { gap: clamp(14px, 1.8vw, 22px); padding: clamp(20px, 2.6vw, 34px); }

.yj-paper-card {
  position: relative;
  padding: clamp(20px, 2.4vw, 32px);
  background: var(--yj-paper);
  color: #0B1B2B;
  border: 1px solid rgba(11, 27, 43, 0.14);
  box-shadow: 8px 8px 0 0 rgba(61, 84, 104, 0.38);
}

.yj-paper-card::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(11, 27, 43, 0.14);
  pointer-events: none;
}

.yj-paper-card .yj-num,
.yj-paper-card .yj-stat__value { color: #9C6A12; }

.yj-note {
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--yj-amber);
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--yj-text-dim);
}

.yj-empty {
  padding: 28px;
  border: 1px dashed var(--yj-line-soft);
  color: var(--yj-text-dim);
  font-size: 0.9375rem;
  text-align: center;
}

.yj-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-block: 14px;
  border-top: 1px solid var(--yj-line-soft);
}

.yj-stat__value {
  font-family: var(--yj-font-mono);
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--yj-amber);
}

.yj-stat__label {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--yj-text-dim);
}

/* ---------- 9. 数据组件 ---------- */
.yj-table { font-size: 0.9375rem; }

.yj-table caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yj-mist);
}

.yj-table th,
.yj-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--yj-line-soft);
}

.yj-table thead th {
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yj-mist);
  border-bottom-color: var(--yj-line);
}

.yj-table tbody tr { transition: background-color 0.2s var(--yj-ease); }

.yj-table tbody tr:hover { background: var(--yj-amber-veil); }

.yj-timeline {
  padding-left: clamp(18px, 2.4vw, 32px);
  border-left: 1px solid var(--yj-line-soft);
}

.yj-timeline__item {
  position: relative;
  padding-block: clamp(16px, 2vw, 26px);
  border-bottom: 1px solid var(--yj-line-soft);
}

.yj-timeline__item::before {
  content: "";
  position: absolute;
  top: 30px;
  left: calc(-1 * clamp(18px, 2.4vw, 32px) - 4px);
  width: 7px;
  height: 7px;
  background: var(--yj-amber);
  border-radius: 50%;
}

.yj-timeline__year {
  font-family: var(--yj-font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--yj-amber);
}

.yj-scroller {
  display: flex;
  gap: clamp(12px, 1.6vw, 20px);
  padding-bottom: 16px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--yj-amber) var(--yj-line-soft);
}

.yj-scroller > * {
  flex: 0 0 clamp(228px, 26vw, 300px);
  scroll-snap-align: start;
}

.yj-scroller--wide > * { flex-basis: clamp(260px, 32vw, 380px); }

.yj-scroller::-webkit-scrollbar { height: 4px; }
.yj-scroller::-webkit-scrollbar-track { background: var(--yj-line-soft); }
.yj-scroller::-webkit-scrollbar-thumb { background: var(--yj-amber); }

@media (hover: hover) {
  .yj-scroller { cursor: grab; }
}

.yj-scroller.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
}

.yj-scroller.is-dragging * { user-select: none; }

.yj-price-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 210px;
  padding: 22px 20px;
  background: var(--yj-ink-700);
  border: 1px solid var(--yj-line-soft);
  transition: border-color 0.26s var(--yj-ease),
              background-color 0.26s var(--yj-ease),
              transform 0.18s var(--yj-ease);
}

.yj-price-card:hover { border-color: var(--yj-amber); }

.yj-price-card.is-active {
  background: var(--yj-ink-800);
  border-color: var(--yj-orange);
  transform: translateY(2px);
}

.yj-price-card__tier {
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yj-mist);
}

.yj-price-card__value {
  font-family: var(--yj-font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--yj-amber);
}

/* ---------- 10. 影像容器 ---------- */
.yj-figure { margin: 0; }

.yj-figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--yj-line-soft);
  border-radius: 2px;
  background: linear-gradient(142deg, var(--yj-ink-700) 0%, var(--yj-ink-800) 56%, rgba(217, 154, 43, 0.18) 100%);
}

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

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

.yj-figure__plate {
  position: absolute;
  top: 0;
  left: 0;
  padding: 5px 10px;
  font-family: var(--yj-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--yj-amber);
  background: rgba(11, 27, 43, 0.92);
}

.yj-figure__caption {
  display: flex;
  gap: 10px;
  margin-top: 10px;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--yj-mist);
}

/* ---------- 11. 导航辅助组件 ---------- */
.yj-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 18px;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--yj-mist);
}

.yj-breadcrumb__sep { color: var(--yj-line); }

.yj-breadcrumb a {
  color: var(--yj-text-dim);
  transition: color 0.24s var(--yj-ease);
}

.yj-breadcrumb a:hover { color: var(--yj-amber); }

.yj-breadcrumb [aria-current="page"] { color: var(--yj-amber); }

.yj-index {
  position: sticky;
  top: 108px;
  align-self: start;
  display: grid;
  gap: 4px;
}

.yj-index__title {
  margin-bottom: 10px;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--yj-mist);
}

.yj-index__link {
  display: block;
  padding: 7px 0 7px 14px;
  font-size: 0.875rem;
  color: var(--yj-text-dim);
  border-left: 1px solid var(--yj-line-soft);
  transition: color 0.24s var(--yj-ease), border-color 0.24s var(--yj-ease);
}

.yj-index__link:hover { color: var(--yj-text-strong); }

.yj-index__link.is-active {
  color: var(--yj-amber);
  border-left-color: var(--yj-orange);
}

.yj-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.yj-tab-panel[hidden] { display: none; }

/* ---------- 12. 页头：悬浮胶囊浮岛 ---------- */
.yj-header {
  position: sticky;
  top: 0;
  z-index: 60;
  padding-block: 10px 6px;
}

.yj-header::before {
  content: "";
  position: absolute;
  inset: 0 0 -24px;
  pointer-events: none;
  background: linear-gradient(180deg,
    rgba(11, 27, 43, 0.95) 0%,
    rgba(11, 27, 43, 0.66) 62%,
    rgba(11, 27, 43, 0) 100%);
}

.yj-header__shell {
  position: relative;
  width: 100%;
  max-width: var(--yj-container);
  margin-inline: auto;
  padding-inline: var(--yj-gutter);
}

.yj-header__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  min-height: 66px;
  padding: 8px 10px 8px 18px;
  background: rgba(18, 38, 58, 0.86);
  border: 1px solid var(--yj-line-soft);
  border-radius: var(--yj-pill);
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  transition: min-height 0.3s var(--yj-ease), background-color 0.3s var(--yj-ease);
}

.yj-header.is-condensed .yj-header__bar {
  min-height: 56px;
  background: rgba(11, 27, 43, 0.94);
}

.yj-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  min-width: 0;
}

.yj-brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--yj-ink-900);
  background: var(--yj-amber);
  border-radius: 10px;
  box-shadow: inset 0 0 0 1px rgba(242, 217, 160, 0.5);
  transition: background-color 0.28s var(--yj-ease), color 0.28s var(--yj-ease);
}

.yj-brand:hover .yj-brand__mark {
  background: var(--yj-orange);
  color: #150800;
}

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

.yj-brand__name {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.14em;
  color: var(--yj-text-strong);
}

.yj-brand__tagline {
  font-family: var(--yj-font-mono);
  font-size: 0.6875rem;
  line-height: 1.4;
  letter-spacing: 0.1em;
  color: var(--yj-mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.yj-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 20px);
  margin-left: auto;
  min-width: 0;
}

.yj-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.yj-nav__item { position: relative; }

.yj-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 11px;
  font-size: 0.9375rem;
  letter-spacing: 0.06em;
  color: var(--yj-text);
  transition: color 0.26s var(--yj-ease);
}

.yj-nav__link::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 4px;
  height: 1px;
  background: var(--yj-amber);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.34s var(--yj-ease);
}

.yj-nav__link:hover { color: var(--yj-text-strong); }
.yj-nav__link:hover::after { transform: scaleX(1); }

.yj-nav__link[aria-current="page"] { color: var(--yj-amber); }
.yj-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.yj-nav__cta { flex: 0 0 auto; }

.yj-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 15px;
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--yj-text-strong);
  border: 1px solid var(--yj-line-soft);
  border-radius: var(--yj-pill);
  cursor: pointer;
  transition: border-color 0.26s var(--yj-ease), color 0.26s var(--yj-ease);
}

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

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

.yj-nav-toggle__bars i {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform 0.28s var(--yj-ease), opacity 0.2s linear;
}

.yj-nav-toggle[aria-expanded="true"] .yj-nav-toggle__bars i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.yj-nav-toggle[aria-expanded="true"] .yj-nav-toggle__bars i:nth-child(2) { opacity: 0; }

.yj-nav-toggle[aria-expanded="true"] .yj-nav-toggle__bars i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.yj-progress {
  position: absolute;
  left: var(--yj-gutter);
  right: var(--yj-gutter);
  bottom: -3px;
  height: 1px;
  overflow: hidden;
  background: var(--yj-line-soft);
}

.yj-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--yj-orange);
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 13. 页脚：尺带边 + 档案层 ---------- */
.yj-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--yj-ink-800);
  border-top: 1px solid var(--yj-line);
  color: var(--yj-text);
}

.yj-footer__edge {
  height: 6px;
  opacity: 0.6;
  background: repeating-linear-gradient(90deg,
    var(--yj-amber) 0 28px,
    transparent 28px 56px,
    var(--yj-orange) 56px 64px,
    transparent 64px 92px);
}

.yj-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
  gap: clamp(24px, 4vw, 64px);
  padding-block: clamp(40px, 6vw, 72px);
}

.yj-footer__lead {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.yj-footer__brand {
  font-family: var(--yj-font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: 0.18em;
  color: var(--yj-text-strong);
}

.yj-footer__tagline {
  margin-top: 12px;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--yj-mist);
}

.yj-footer__cta { margin-top: 22px; }

.yj-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 36px);
}

.yj-footer__col-title {
  margin-bottom: 14px;
  font-family: var(--yj-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yj-amber);
}

.yj-footer__list { display: grid; gap: 9px; }

.yj-footer__link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 0.9375rem;
  color: var(--yj-text);
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0 1px;
  transition: background-size 0.3s var(--yj-ease), color 0.24s var(--yj-ease);
}

.yj-footer__link:hover {
  color: var(--yj-amber-soft);
  background-size: 100% 1px;
}

.yj-footer__link--meta {
  font-size: 0.8125rem;
  color: var(--yj-text-dim);
}

.yj-footer__contact {
  grid-column: 1 / -1;
  margin-top: clamp(8px, 1.6vw, 20px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--yj-line-soft);
}

.yj-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px 28px;
}

.yj-contact__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.yj-contact__key {
  font-family: var(--yj-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yj-mist);
}

.yj-contact__val {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--yj-text-strong);
  word-break: break-word;
}

.yj-contact__val.yj-num { font-size: 1.0625rem; }

.yj-footer__note {
  margin-top: 18px;
  max-width: 62em;
  font-size: 0.8125rem;
  line-height: 1.85;
  color: var(--yj-text-dim);
}

.yj-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-block: 20px 28px;
  border-top: 1px solid var(--yj-line-soft);
}

.yj-footer__copy {
  font-family: var(--yj-font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--yj-text-dim);
}

.yj-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.yj-totop {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--yj-text-dim);
  border: 1px solid var(--yj-line-soft);
  border-radius: var(--yj-pill);
  cursor: pointer;
  transition: border-color 0.26s var(--yj-ease), color 0.26s var(--yj-ease);
}

.yj-totop:hover { border-color: var(--yj-amber); color: var(--yj-amber); }

.yj-totop[hidden] { display: none; }

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1024px) {
  .yj-brand__tagline { display: none; }

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

  .yj-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    z-index: 5;
    display: block;
    margin: 0;
    padding: 10px;
    background: rgba(11, 27, 43, 0.97);
    border: 1px solid var(--yj-line);
    border-radius: 22px;
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.48);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.24s var(--yj-ease),
                transform 0.24s var(--yj-ease),
                visibility 0.24s linear;
  }

  .yj-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .yj-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .yj-nav__link {
    display: block;
    padding: 13px 14px;
    border-bottom: 1px solid var(--yj-line-soft);
  }

  .yj-nav__link::after { display: none; }

  .yj-nav__link[aria-current="page"] {
    color: var(--yj-amber);
    background: var(--yj-amber-veil);
  }

  .yj-nav__cta {
    width: 100%;
    margin-top: 12px;
  }

  .yj-col-3,
  .yj-col-4 { grid-column: span 6; }
  .yj-col-5,
  .yj-col-7,
  .yj-col-8,
  .yj-col-9 { grid-column: span 12; }

  .yj-index { position: static; top: auto; }
}

@media (max-width: 900px) {
  body { font-size: 16px; }

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

  .yj-figure--wide .yj-figure__frame { aspect-ratio: 16 / 9; }
}

@media (max-width: 760px) {
  .yj-col-3,
  .yj-col-4,
  .yj-col-5,
  .yj-col-6,
  .yj-col-7,
  .yj-col-8,
  .yj-col-9 { grid-column: span 12; }

  .yj-header__bar { min-height: 60px; padding: 7px 8px 7px 14px; }

  .yj-brand__mark { width: 34px; height: 34px; }

  .yj-scroller > * { flex-basis: 78%; }

  .yj-table { font-size: 0.875rem; }
  .yj-table th,
  .yj-table td { padding: 10px 10px; }
}

@media (max-width: 600px) {
  .yj-footer__cols { grid-template-columns: minmax(0, 1fr); }
  .yj-footer__bottom { flex-direction: column; align-items: flex-start; }
  .yj-contact { grid-template-columns: minmax(0, 1fr); }
  .yj-paper-card { box-shadow: 5px 5px 0 0 rgba(61, 84, 104, 0.38); }
}

/* ---------- 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-behavior: auto !important;
  }
}