/* ==========================================================================
   乐天棋牌 · 共享样式表 /assets/site.css
   深海墨蓝底 · 霓虹青与暖金高光 · 切角堆叠面板 · 展签式标签
   ========================================================================== */

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

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

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

ul, ol { 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%; }

[hidden] { display: none !important; }

/* ---------- 2. 变量 ---------- */
:root {
  --bg: #071019;
  --bg-soft: #0A1521;
  --panel: #0E1B2A;
  --panel-2: #122234;
  --paper: #E9E2D4;
  --cyan: #35E6D2;
  --cyan-dim: #1B7F79;
  --gold: #E8B457;
  --gold-dim: #8A6A2F;
  --purple: #6E6A85;
  --lilac: #A9A3BE;
  --ivory: #F2EFE6;
  --fog: #9FB0BE;

  --line: rgba(233, 226, 212, 0.12);
  --line-soft: rgba(233, 226, 212, 0.08);
  --line-cyan: rgba(53, 230, 210, 0.36);
  --line-gold: rgba(138, 106, 47, 0.48);

  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 44px);
  --cut: 22px;
  --header-h: 80px;
}

@media (max-width: 1040px) {
  :root { --header-h: 64px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100%;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--ivory);
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 560px at 84% -12%, rgba(53, 230, 210, 0.10), transparent 62%),
    radial-gradient(880px 520px at 6% 10%, rgba(232, 180, 87, 0.07), transparent 64%),
    linear-gradient(180deg, #08131F 0%, #071019 46%, #061019 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.005em;
  color: var(--ivory);
}

.lt-display {
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.012em;
  text-shadow: 0 0 28px rgba(53, 230, 210, 0.20);
}

.lt-h2 {
  font-size: clamp(1.62rem, 3.2vw, 2.75rem);
  font-weight: 900;
  line-height: 1.14;
  text-shadow: 0 0 22px rgba(53, 230, 210, 0.14);
}

.lt-h3 {
  font-size: clamp(1.24rem, 2.1vw, 1.6rem);
  font-weight: 800;
}

.lt-h4 {
  font-size: 1.06rem;
  font-weight: 800;
}

.lt-lead {
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  line-height: 1.8;
  color: var(--fog);
  max-width: 40em;
}

.lt-prose {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--fog);
}

.lt-prose p { max-width: 40em; }
.lt-prose p + p { margin-top: 0.9em; }

.lt-prose a {
  color: var(--cyan);
  border-bottom: 1px solid var(--line-cyan);
}

.lt-prose a:hover { color: var(--gold); border-bottom-color: var(--gold-dim); }

.lt-num {
  font-family: var(--mono);
  font-size: 1.12em;
  letter-spacing: 0.08em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.lt-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.26em;
  color: var(--cyan);
}

.lt-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.lt-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--gold-dim), var(--line-cyan) 42%, transparent);
}

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

/* ---------- 4. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

.lt-skip {
  position: fixed;
  top: -70px;
  left: 16px;
  z-index: 200;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #04161A;
  background: var(--cyan);
  border-radius: 2px;
  transition: top 0.18s ease-out;
}

.lt-skip:focus { top: 14px; }

/* ---------- 5. 头部：左右分置导航 ---------- */
.lt-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(9, 19, 31, 0.97), rgba(7, 16, 25, 0.90));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.lt-header__inner {
  width: 100%;
  max-width: var(--shell);
  min-height: var(--header-h);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 3vw, 52px);
}

.lt-header__rule {
  height: 1px;
  background: linear-gradient(90deg,
    rgba(138, 106, 47, 0) 0%,
    rgba(138, 106, 47, 0.80) 18%,
    rgba(138, 106, 47, 0.34) 58%,
    rgba(53, 230, 210, 0.48) 100%);
}

.lt-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.lt-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* 品牌 */
.lt-brand { flex: none; }

.lt-brand__link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lt-brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-cyan);
  background: radial-gradient(circle at 30% 22%, rgba(53, 230, 210, 0.18), transparent 72%);
  clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 11px, 100% 100%, 11px 100%, 0 calc(100% - 11px));
}

.lt-brand__text { display: block; }

.lt-brand__name {
  display: block;
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.3;
  color: var(--ivory);
  text-shadow: 0 0 18px rgba(53, 230, 210, 0.18);
}

.lt-brand__tag {
  display: block;
  font-size: 0.7rem;
  line-height: 1.4;
  letter-spacing: 0.16em;
  color: var(--fog);
}

/* 导航 */
.lt-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 34px);
}

.lt-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 24px);
}

.lt-nav__item { position: relative; }

.lt-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-size: 0.93rem;
  color: var(--fog);
  white-space: nowrap;
  transition: color 0.18s ease-out;
}

.lt-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 1px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease-out, background-color 0.18s ease-out;
}

.lt-nav__link:hover,
.lt-nav__link:focus-visible { color: var(--ivory); }

.lt-nav__link:hover::after,
.lt-nav__link:focus-visible::after { transform: scaleX(1); }

.lt-nav__link[aria-current="page"] { color: var(--gold); }

.lt-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold);
}

.lt-nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 移动导航按钮 */
.lt-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  color: var(--paper);
  border: 1px solid rgba(233, 226, 212, 0.26);
  border-radius: 2px;
  transition: border-color 0.18s ease-out, color 0.18s ease-out;
}

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

.lt-nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 17px;
}

.lt-nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.2s ease-out, opacity 0.2s ease-out;
}

.lt-nav-toggle[aria-expanded="true"] .lt-nav-toggle__bars span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

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

.lt-nav-toggle[aria-expanded="true"] .lt-nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

.lt-nav-toggle__label { line-height: 1; }

/* ---------- 6. 按钮 ---------- */
.lt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.3;
  text-align: center;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background-color 0.18s ease-out, color 0.18s ease-out,
    border-color 0.18s ease-out, transform 0.18s ease-out;
}

.lt-btn--primary {
  background: var(--gold);
  color: #1A1206;
  border-color: var(--gold);
}

.lt-btn--primary:hover,
.lt-btn--primary:focus-visible {
  background: #F0C674;
  border-color: #F0C674;
  transform: translateY(-1px);
}

.lt-btn--ghost {
  background: rgba(233, 226, 212, 0.03);
  color: var(--paper);
  border-color: rgba(233, 226, 212, 0.26);
}

.lt-btn--ghost:hover,
.lt-btn--ghost:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.lt-btn--quiet {
  background: rgba(53, 230, 210, 0.10);
  color: var(--cyan);
  border-color: var(--line-cyan);
}

.lt-btn--quiet:hover,
.lt-btn--quiet:focus-visible {
  background: rgba(53, 230, 210, 0.18);
  color: var(--ivory);
}

/* ---------- 7. 容器与栅格 ---------- */
.lt-main { display: block; }

.lt-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.lt-shell--narrow { max-width: 940px; }

.lt-section {
  position: relative;
  padding: clamp(42px, 7vw, 92px) 0;
}

.lt-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: clamp(22px, 3vw, 38px);
}

.lt-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

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

@media (max-width: 900px) {
  .lt-grid { gap: 18px; }
  .lt-col-4,
  .lt-col-5,
  .lt-col-6,
  .lt-col-7,
  .lt-col-8 { grid-column: span 12; }
}

/* ---------- 8. 面包屑 ---------- */
.lt-breadcrumb { padding: 20px 0 0; }

.lt-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  font-size: 0.82rem;
  color: var(--fog);
}

.lt-breadcrumb__item { display: inline-flex; align-items: center; gap: 9px; }

.lt-breadcrumb__link {
  color: var(--fog);
  transition: color 0.18s ease-out;
}

.lt-breadcrumb__link:hover { color: var(--cyan); }

.lt-breadcrumb__sep {
  color: var(--gold-dim);
  font-family: var(--mono);
}

.lt-breadcrumb__item[aria-current="page"] { color: var(--lilac); }

/* ---------- 9. 展签与画板 ---------- */
.lt-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  font-size: 0.71rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.6;
  color: #0B1622;
  background: var(--paper);
  border-radius: 1px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.lt-tag--gold { background: var(--gold); color: #1A1206; }

.lt-tag--ghost {
  background: rgba(53, 230, 210, 0.08);
  color: var(--cyan);
  border: 1px solid var(--line-cyan);
}

.lt-panel {
  position: relative;
  padding: clamp(20px, 2.6vw, 32px);
  background: linear-gradient(180deg, rgba(18, 34, 52, 0.94), rgba(14, 27, 42, 0.94));
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color 0.2s ease-out, box-shadow 0.2s ease-out, transform 0.2s ease-out;
}

.lt-panel--cut {
  clip-path: polygon(0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut)));
}

.lt-panel--rail {
  padding-left: clamp(24px, 3vw, 38px);
  box-shadow: inset 3px 0 0 0 var(--cyan-dim);
}

.lt-panel:hover {
  border-color: rgba(232, 180, 87, 0.45);
  box-shadow: 0 18px 40px -26px rgba(0, 0, 0, 0.9), inset 0 0 0 1px rgba(232, 180, 87, 0.18);
}

.lt-panel__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.lt-panel__title {
  font-size: 1.14rem;
  font-weight: 800;
  color: var(--ivory);
}

.lt-panel__note {
  font-size: 0.8rem;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  color: var(--lilac);
  white-space: nowrap;
}

.lt-panel__body {
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--fog);
  max-width: 42em;
}

/* ---------- 10. 图片容器（供页面阶段放置视觉） ---------- */
.lt-media {
  position: relative;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
  background-color: var(--panel);
  background-image:
    linear-gradient(135deg, rgba(53, 230, 210, 0.12) 0%, rgba(110, 106, 133, 0.20) 46%, rgba(232, 180, 87, 0.12) 100%),
    radial-gradient(120% 90% at 80% 10%, rgba(53, 230, 210, 0.10), transparent 60%);
}

.lt-media > img,
.lt-media > svg,
.lt-media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lt-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 52%, rgba(7, 16, 25, 0.62));
  pointer-events: none;
}

.lt-media--wide { aspect-ratio: 16 / 9; }
.lt-media--square { aspect-ratio: 1 / 1; }
.lt-media--tall { aspect-ratio: 4 / 5; }
.lt-media--band { aspect-ratio: 21 / 9; }

.lt-media__frame {
  position: absolute;
  inset: 10px;
  z-index: 2;
  border: 1px dashed rgba(233, 226, 212, 0.20);
  pointer-events: none;
}

.lt-media__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 3;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--paper);
}

/* ---------- 11. 数据行 ---------- */
.lt-kv { display: grid; gap: 2px; }

.lt-kv__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 11px 0;
  font-size: 0.94rem;
  border-bottom: 1px dashed var(--line);
}

.lt-kv__key { color: var(--fog); }

.lt-kv__val {
  font-family: var(--mono);
  letter-spacing: 0.06em;
  color: var(--paper);
}

/* ---------- 12. 可展开内容组 ---------- */
.lt-disclosure { display: grid; gap: 10px; }

.lt-disclosure__item {
  background: rgba(14, 27, 42, 0.72);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color 0.2s ease-out, background-color 0.2s ease-out;
}

.lt-disclosure__item[data-open="true"] {
  border-color: var(--line-cyan);
  background: rgba(18, 34, 52, 0.9);
}

.lt-disclosure__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 16px 20px;
  font-size: 1rem;
  font-weight: 700;
  text-align: left;
  color: var(--ivory);
  transition: color 0.18s ease-out;
}

.lt-disclosure__btn:hover { color: var(--cyan); }

.lt-disclosure__sign {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  color: var(--fog);
  transition: transform 0.24s ease-out, color 0.24s ease-out;
}

.lt-disclosure__sign::before,
.lt-disclosure__sign::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.lt-disclosure__sign::before {
  left: 0; right: 0; top: 8px; height: 2px;
}

.lt-disclosure__sign::after {
  top: 0; bottom: 0; left: 8px; width: 2px;
  transition: opacity 0.24s ease-out;
}

.lt-disclosure__item[data-open="true"] .lt-disclosure__sign {
  transform: rotate(90deg);
  color: var(--cyan);
}

.lt-disclosure__item[data-open="true"] .lt-disclosure__sign::after { opacity: 0; }

.lt-disclosure__panel {
  padding: 0 20px 20px;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--fog);
}

.lt-disclosure__body { max-width: 42em; }

/* ---------- 13. 标签页 ---------- */
.lt-tabs { display: grid; gap: 20px; }

.lt-tabs__list {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  width: max-content;
  max-width: 100%;
  padding: 5px;
  background: rgba(7, 16, 25, 0.65);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.lt-tabs__tab {
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--fog);
  border-radius: 1px;
  transition: background-color 0.18s ease-out, color 0.18s ease-out;
}

.lt-tabs__tab:hover { color: var(--ivory); }

.lt-tabs__tab[aria-selected="true"] {
  background: var(--cyan);
  color: #04161A;
}

.lt-tabs__panel { animation: ltFade 0.28s ease-out; }

@keyframes ltFade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 14. 标签筛选 ---------- */
.lt-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}

.lt-filter__btn {
  padding: 7px 15px;
  font-size: 0.83rem;
  letter-spacing: 0.04em;
  color: var(--fog);
  border: 1px solid rgba(233, 226, 212, 0.20);
  border-radius: 99px;
  transition: color 0.18s ease-out, border-color 0.18s ease-out, background-color 0.18s ease-out;
}

.lt-filter__btn:hover { color: var(--ivory); border-color: var(--line-cyan); }

.lt-filter__btn[aria-pressed="true"] {
  color: var(--gold);
  border-color: var(--gold);
  background: rgba(232, 180, 87, 0.12);
}

.lt-filter__count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--lilac);
}

/* ---------- 15. 返回顶部 ---------- */
.lt-to-top {
  position: fixed;
  right: clamp(14px, 3vw, 30px);
  bottom: clamp(14px, 3vw, 30px);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-size: 1rem;
  color: var(--cyan);
  background: rgba(14, 27, 42, 0.94);
  border: 1px solid var(--line-cyan);
  border-radius: 2px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.22s ease-out, transform 0.22s ease-out,
    visibility 0.22s linear, color 0.18s ease-out, border-color 0.18s ease-out;
}

.lt-to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.lt-to-top:hover { color: var(--gold); border-color: var(--gold); }

/* ---------- 16. 页脚 ---------- */
.lt-footer {
  margin-top: clamp(56px, 9vw, 128px);
  background: linear-gradient(180deg, #08121D 0%, #050C14 100%);
  border-top: 1px solid var(--line-gold);
}

.lt-footer__inner {
  display: grid;
  grid-template-columns: 1.1fr 1.7fr 1.1fr;
  gap: clamp(24px, 4vw, 56px);
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(38px, 5vw, 66px) var(--gutter) 30px;
}

.lt-footer__name {
  font-size: 1.22rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--ivory);
  text-shadow: 0 0 18px rgba(53, 230, 210, 0.16);
}

.lt-footer__slogan {
  margin-top: 10px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--fog);
  max-width: 24em;
}

.lt-footer__badge {
  display: inline-block;
  margin-top: 16px;
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--lilac);
  border: 1px dashed rgba(169, 163, 190, 0.36);
  border-radius: 1px;
}

.lt-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.lt-footer__col { min-width: 0; }

.lt-footer__title {
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.lt-footer__links { display: grid; gap: 10px; }

.lt-footer__link {
  font-size: 0.93rem;
  color: var(--fog);
  transition: color 0.18s ease-out, padding-left 0.18s ease-out;
}

.lt-footer__link:hover,
.lt-footer__link:focus-visible {
  color: var(--cyan);
  padding-left: 5px;
}

.lt-footer__contact { min-width: 0; }

.lt-contact-list {
  display: grid;
  gap: 10px;
  font-size: 0.9rem;
}

.lt-contact-list__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  align-items: baseline;
}

.lt-contact-list__key {
  flex: none;
  min-width: 58px;
  color: var(--lilac);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.lt-contact-list__val {
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  word-break: break-all;
}

.lt-contact-list__val--wrap {
  font-family: var(--sans);
  font-size: 0.9rem;
  line-height: 1.7;
  letter-spacing: 0.01em;
}

.lt-footer__note {
  margin-top: 14px;
  padding-top: 12px;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--lilac);
  border-top: 1px dashed rgba(169, 163, 190, 0.24);
}

.lt-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 36px;
  border-top: 1px solid var(--line-soft);
}

.lt-footer__legal {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--lilac);
}

.lt-footer__copy {
  font-size: 0.8rem;
  color: var(--fog);
}

/* ---------- 17. 显现动效 ---------- */
html.lt-js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.42s ease-out, transform 0.42s ease-out;
}

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

/* ---------- 18. 平板与移动 ---------- */
@media (max-width: 1040px) {
  .lt-nav-toggle { display: inline-flex; }

  .lt-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: calc(var(--header-h) + 1px);
    bottom: 0;
    z-index: 75;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 24px var(--gutter) 48px;
    overflow-y: auto;
    background: linear-gradient(180deg, #0A1521 0%, #071019 100%);
    border-top: 1px solid var(--line-cyan);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.22s ease-out, transform 0.22s ease-out, visibility 0.22s linear;
  }

  .lt-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

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

  .lt-nav__item { border-bottom: 1px solid var(--line-soft); }

  .lt-nav__link {
    display: block;
    padding: 16px 2px;
    font-size: 1.04rem;
  }

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

  .lt-nav__link[aria-current="page"] { padding-left: 12px; }

  .lt-nav__actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-top: 26px;
  }

  .lt-nav__actions .lt-btn { width: 100%; padding: 14px 18px; }
}

@media (max-width: 1024px) {
  .lt-footer__inner { grid-template-columns: 1fr 1fr; }
  .lt-footer__contact { grid-column: span 2; }
}

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

  .lt-section__head { align-items: flex-start; }

  .lt-tabs__list { width: 100%; }

  .lt-filter__count { margin-left: 0; width: 100%; }
}

@media (max-width: 720px) {
  .lt-brand__mark { width: 38px; height: 38px; }
  .lt-brand__name { font-size: 1.08rem; }
  .lt-brand__tag { font-size: 0.64rem; letter-spacing: 0.1em; }

  .lt-footer__inner { grid-template-columns: 1fr; }
  .lt-footer__contact { grid-column: span 1; }
  .lt-footer__cols { grid-template-columns: 1fr 1fr; }
  .lt-footer__meta { flex-direction: column; align-items: flex-start; }
}

/* ---------- 19. 减弱动效 ---------- */
@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;
  }

  html.lt-js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}