/* =========================================================
   乐投官网 · 全站共享样式 /assets/site.css
   结构：重置 → 变量 → 基础排版 → 工具类 → 页头 → 导航
        → 悬浮面板 → 进度条 → 遮罩 → 页脚 → 通用组件
        → 响应式 → 减弱动效
   ========================================================= */

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

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

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

ul, ol { padding: 0; }

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

a { color: inherit; }

/* ---------- 变量 ---------- */
:root {
  --lt-red: #D7263D;
  --lt-red-deep: #8F1D2C;
  --lt-cream: #F3E9D2;
  --lt-ink: #1A1416;
  --lt-ink-2: #2E2424;
  --lt-gold: #D9A441;
  --lt-slate: #2C3E50;
  --lt-teal: #2A9D8F;
  --lt-mist: #6B7A8F;
  --lt-paper: #FFF8E7;

  --lt-line: rgba(243, 233, 210, 0.16);
  --lt-line-strong: rgba(243, 233, 210, 0.34);
  --lt-text-soft: rgba(243, 233, 210, 0.78);

  --lt-font-cn: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --lt-font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --lt-max: 1200px;
  --lt-gutter: clamp(1rem, 4vw, 3rem);
  --lt-radius: 2px;
  --lt-shadow: 0 24px 52px -30px rgba(0, 0, 0, 0.92);
  --lt-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 基础排版 ---------- */
body {
  background-color: var(--lt-ink);
  background-image:
    radial-gradient(1200px 520px at 82% -8%, rgba(44, 62, 80, 0.42), transparent 68%),
    radial-gradient(760px 420px at 4% 6%, rgba(143, 29, 44, 0.24), transparent 70%);
  background-attachment: fixed;
  color: var(--lt-cream);
  font-family: var(--lt-font-cn);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.015em;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--lt-font-cn);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.005em;
  color: var(--lt-paper);
}

h1 { font-size: clamp(2.1rem, 5.4vw, 4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.3rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.45rem); }

p { color: var(--lt-text-soft); }

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

code, kbd, samp {
  font-family: var(--lt-font-mono);
  font-size: 0.86em;
  color: var(--lt-gold);
  background: rgba(217, 164, 65, 0.1);
  padding: 0.1em 0.35em;
  border-radius: 1px;
}

::selection {
  background: var(--lt-red);
  color: var(--lt-paper);
}

/* ---------- 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--lt-gold);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(215, 38, 61, 0.42);
}

.lt-btn:focus-visible,
.lt-nav-toggle:focus-visible,
.lt-copy:focus-visible,
.lt-top:focus-visible {
  outline: 2px solid var(--lt-gold);
  outline-offset: 2px;
  box-shadow: inset 0 0 0 2px var(--lt-red);
}

.lt-skip {
  position: fixed;
  left: 1rem;
  top: -4.5rem;
  z-index: 200;
  background: var(--lt-gold);
  color: var(--lt-ink);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  padding: 0.65rem 1.1rem;
  border-radius: var(--lt-radius);
  text-decoration: none;
  transition: top 0.2s var(--lt-ease);
}

.lt-skip:focus {
  top: 0.9rem;
}

/* ---------- 工具类 ---------- */
.lt-shell {
  width: 100%;
  max-width: var(--lt-max);
  margin-inline: auto;
  padding-inline: var(--lt-gutter);
}

.lt-main {
  display: block;
  flex: 1 0 auto;
  scroll-margin-top: 9.5rem;
}

.lt-section {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.lt-grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

.lt-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.lt-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.lt-grid--auto { grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }

.lt-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
  font-family: var(--lt-font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lt-gold);
}

.lt-eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--lt-red);
  flex: 0 0 auto;
}

.lt-lede {
  max-width: 46rem;
  font-size: clamp(1rem, 1.35vw, 1.12rem);
  line-height: 1.85;
  color: var(--lt-text-soft);
}

.lt-prose {
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--lt-text-soft);
}

.lt-prose p { margin-bottom: 1.1em; }
.lt-prose p:last-child { margin-bottom: 0; }

.lt-prose h2,
.lt-prose h3 {
  margin: 1.9em 0 0.7em;
  color: var(--lt-paper);
}

.lt-prose h2:first-child,
.lt-prose h3:first-child { margin-top: 0; }

.lt-prose ul,
.lt-prose ol {
  margin: 0 0 1.1em;
  padding-left: 1.3rem;
}

.lt-prose li { margin-bottom: 0.45em; }

.lt-rule {
  height: 1px;
  border: 0;
  margin-inline: 0;
  background: linear-gradient(90deg, var(--lt-red) 0%, rgba(217, 164, 65, 0.55) 32%, transparent 100%);
}

.lt-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  font-family: var(--lt-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  line-height: 1.5;
  color: var(--lt-ink);
  background: var(--lt-cream);
  border: 1px solid rgba(26, 20, 22, 0.28);
  border-radius: 1px;
}

.lt-tag--red {
  color: var(--lt-paper);
  background: var(--lt-red);
  border-color: var(--lt-red-deep);
}

.lt-tag--ghost {
  color: var(--lt-gold);
  background: transparent;
  border-color: rgba(217, 164, 65, 0.5);
}

.lt-card {
  position: relative;
  background: var(--lt-ink-2);
  border: 1px solid var(--lt-line);
  border-radius: var(--lt-radius);
  padding: clamp(1.1rem, 2vw, 1.6rem);
  transition: transform 0.18s var(--lt-ease), border-color 0.18s var(--lt-ease), background-color 0.18s var(--lt-ease), box-shadow 0.18s var(--lt-ease);
}

.lt-card:hover {
  transform: translateY(-3px);
  border-color: var(--lt-red);
  background: #342829;
  box-shadow: var(--lt-shadow);
}

.lt-card--paper {
  background: var(--lt-paper);
  color: var(--lt-ink-2);
  border-color: rgba(26, 20, 22, 0.2);
}

.lt-card--paper:hover {
  background: var(--lt-cream);
  border-color: var(--lt-red);
}

.lt-breadcrumb {
  font-family: var(--lt-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--lt-mist);
}

.lt-breadcrumb ol,
.lt-breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.lt-breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.lt-breadcrumb li + li::before {
  content: "·";
  color: var(--lt-red);
}

.lt-breadcrumb a {
  color: var(--lt-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--lt-ease), border-color 0.16s var(--lt-ease);
}

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

/* ---------- 按钮 ---------- */
.lt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.2rem;
  font-family: var(--lt-font-cn);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--lt-cream);
  background: transparent;
  border: 1px solid var(--lt-line-strong);
  border-radius: var(--lt-radius);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s var(--lt-ease), background-color 0.16s var(--lt-ease), border-color 0.16s var(--lt-ease), color 0.16s var(--lt-ease), box-shadow 0.16s var(--lt-ease);
}

.lt-btn:hover {
  transform: translateY(-2px);
  border-color: var(--lt-red);
  color: var(--lt-paper);
}

.lt-btn--primary {
  color: var(--lt-paper);
  background: var(--lt-red);
  border-color: var(--lt-red-deep);
  box-shadow: 4px 4px 0 rgba(143, 29, 44, 0.9);
}

.lt-btn--primary:hover {
  background: var(--lt-red-deep);
  color: var(--lt-paper);
  box-shadow: 6px 6px 0 rgba(143, 29, 44, 0.72);
}

.lt-btn--ghost {
  color: var(--lt-gold);
  border-color: rgba(217, 164, 65, 0.55);
}

.lt-btn--ghost:hover {
  color: var(--lt-ink);
  background: var(--lt-gold);
  border-color: var(--lt-gold);
}

.lt-btn--sm {
  padding: 0.5rem 0.9rem;
  font-size: 0.8rem;
}

/* ---------- 图片容器 ---------- */
.lt-figure {
  position: relative;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--lt-line);
  border-radius: var(--lt-radius);
  background: linear-gradient(140deg, var(--lt-slate) 0%, var(--lt-ink-2) 58%, #3A1C22 100%);
}

.lt-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(243, 233, 210, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(243, 233, 210, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

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

.lt-figure--wide { aspect-ratio: 16 / 9; }
.lt-figure--tall { aspect-ratio: 3 / 4; }
.lt-figure--square { aspect-ratio: 1 / 1; }
.lt-figure--banner { aspect-ratio: 21 / 9; }

.lt-figure__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  max-width: 100%;
  padding: 0.45rem 0.75rem;
  font-family: var(--lt-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--lt-cream);
  background: rgba(19, 14, 15, 0.86);
  border-top: 2px solid var(--lt-red);
}

/* ---------- 页头 ---------- */
.lt-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(180deg, #221A1C 0%, #1A1416 100%);
  border-bottom: 1px solid var(--lt-line);
  box-shadow: 0 18px 40px -34px rgba(0, 0, 0, 1);
}

.lt-header__bar {
  background: linear-gradient(180deg, rgba(44, 62, 80, 0.22), rgba(26, 20, 22, 0));
}

.lt-header__inner {
  width: 100%;
  max-width: var(--lt-max);
  margin-inline: auto;
  padding-inline: var(--lt-gutter);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lt-header__bar .lt-header__inner {
  min-height: 4.25rem;
  padding-block: 0.7rem;
}

.lt-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--lt-cream);
}

.lt-brand__mark {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  flex: 0 0 auto;
  font-family: var(--lt-font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lt-paper);
  background: var(--lt-red);
  border: 1px solid var(--lt-red-deep);
  box-shadow: 3px 3px 0 var(--lt-red-deep);
  transition: transform 0.16s var(--lt-ease), box-shadow 0.16s var(--lt-ease);
}

.lt-brand:hover .lt-brand__mark {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--lt-red-deep);
}

.lt-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.lt-brand__name {
  font-size: 1.06rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--lt-paper);
}

.lt-brand__meta {
  font-family: var(--lt-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--lt-mist);
  white-space: nowrap;
}

.lt-header__coord {
  margin-left: 1.35rem;
  font-family: var(--lt-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: var(--lt-mist);
  white-space: nowrap;
}

.lt-header__act {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.lt-nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.52rem 0.72rem;
  color: var(--lt-cream);
  background: transparent;
  border: 1px solid var(--lt-line-strong);
  border-radius: var(--lt-radius);
  font-family: var(--lt-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.16s var(--lt-ease), color 0.16s var(--lt-ease), background-color 0.16s var(--lt-ease);
}

.lt-nav-toggle:hover {
  color: var(--lt-paper);
  border-color: var(--lt-red);
  background: rgba(215, 38, 61, 0.14);
}

.lt-nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.lt-nav-toggle__bars i {
  display: block;
  height: 2px;
  background: var(--lt-red);
  transition: transform 0.2s var(--lt-ease), opacity 0.2s var(--lt-ease);
}

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

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

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

/* ---------- 主导航 ---------- */
.lt-navwrap {
  background: rgba(44, 62, 80, 0.24);
  border-top: 1px solid var(--lt-line);
}

.lt-nav {
  width: 100%;
}

.lt-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.lt-nav__item {
  position: relative;
}

.lt-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.85rem 0.98rem;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--lt-mist);
  text-decoration: none;
  transition: color 0.16s var(--lt-ease), background-color 0.16s var(--lt-ease);
}

.lt-nav__link::after {
  content: "";
  position: absolute;
  left: 0.98rem;
  right: 0.98rem;
  bottom: 0.42rem;
  height: 2px;
  background: var(--lt-red);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.2s var(--lt-ease);
}

.lt-nav__link:hover {
  color: var(--lt-cream);
  background: rgba(243, 233, 210, 0.05);
}

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

.lt-nav__link[aria-current="page"] {
  color: var(--lt-paper);
  background: rgba(215, 38, 61, 0.16);
}

.lt-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  bottom: 0.55rem;
  width: 3px;
  background: var(--lt-red);
}

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

/* ---------- 悬浮面板 ---------- */
.lt-panel {
  position: absolute;
  top: calc(100% + 0.55rem);
  left: 0;
  z-index: 30;
  min-width: 17.5rem;
  padding: 1rem 1.1rem 1.1rem;
  background: #20191B;
  border: 1px solid var(--lt-line-strong);
  border-top: 3px solid var(--lt-red);
  border-radius: var(--lt-radius);
  box-shadow: var(--lt-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.18s var(--lt-ease), transform 0.18s var(--lt-ease), visibility 0.18s;
}

.lt-nav__item--panel:hover .lt-panel,
.lt-nav__item--panel:focus-within .lt-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lt-panel__label {
  margin: 0 0 0.7rem;
  font-family: var(--lt-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--lt-gold);
  text-transform: uppercase;
}

.lt-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}

.lt-panel__item { display: block; }

.lt-panel__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.48rem 0.6rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--lt-cream);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.16s var(--lt-ease), background-color 0.16s var(--lt-ease), border-color 0.16s var(--lt-ease);
}

.lt-panel__link:hover {
  color: var(--lt-paper);
  background: rgba(215, 38, 61, 0.16);
  border-left-color: var(--lt-red);
}

.lt-panel__hint {
  font-family: var(--lt-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--lt-mist);
  white-space: nowrap;
}

.lt-panel__link:hover .lt-panel__hint {
  color: var(--lt-gold);
}

.lt-panel__foot {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0.85rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--lt-line-strong);
  font-family: var(--lt-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--lt-mist);
}

.lt-panel__foot::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--lt-teal);
  box-shadow: 0 0 0 3px rgba(42, 157, 143, 0.18);
}

/* ---------- 滚动进度 ---------- */
.lt-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(243, 233, 210, 0.08);
  pointer-events: none;
}

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

/* ---------- 遮罩 ---------- */
.lt-scrim {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(10, 7, 8, 0.72);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s var(--lt-ease), visibility 0.22s;
}

.lt-scrim[data-open] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ---------- 页脚 ---------- */
.lt-footer {
  position: relative;
  flex: 0 0 auto;
  background: #130E0F;
  border-top: 1px solid var(--lt-line);
  color: var(--lt-cream);
}

.lt-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--lt-red) 0%, var(--lt-red) 18%,
    var(--lt-gold) 18%, var(--lt-gold) 21%,
    transparent 21%, transparent 100%);
}

.lt-footer__grid {
  width: 100%;
  max-width: var(--lt-max);
  margin-inline: auto;
  padding: clamp(2.5rem, 5vw, 4rem) var(--lt-gutter) clamp(1.75rem, 3vw, 2.75rem);
  display: grid;
  grid-template-columns: 1.5fr 0.95fr 1fr 0.95fr 1.6fr;
  gap: clamp(1.5rem, 3vw, 2.75rem);
}

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

.lt-footer__mark {
  display: inline-block;
  padding-bottom: 0.35rem;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--lt-paper);
  border-bottom: 2px solid var(--lt-red);
}

.lt-footer__tagline {
  margin: 0.9rem 0 0.7rem;
  font-family: var(--lt-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--lt-mist);
}

.lt-footer__icp {
  margin: 0;
  font-family: var(--lt-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--lt-gold);
}

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

.lt-footer__title {
  margin: 0 0 1rem;
  font-family: var(--lt-font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--lt-paper);
}

.lt-footer__title::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  margin-right: 0.55rem;
  vertical-align: middle;
  background: var(--lt-gold);
}

.lt-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.lt-footer__link {
  display: inline-block;
  font-size: 0.88rem;
  color: var(--lt-mist);
  text-decoration: none;
  transition: color 0.16s var(--lt-ease), padding-left 0.16s var(--lt-ease);
}

.lt-footer__link:hover {
  color: var(--lt-gold);
  padding-left: 0.35rem;
}

.lt-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
}

.lt-contact__label {
  flex: 0 0 auto;
  min-width: 2.4rem;
  font-family: var(--lt-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--lt-gold);
}

.lt-contact__val {
  font-family: var(--lt-font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--lt-cream);
  word-break: break-word;
}

.lt-copy {
  flex: 0 0 auto;
  padding: 0.14rem 0.45rem;
  font-family: var(--lt-font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  color: var(--lt-mist);
  background: transparent;
  border: 1px solid var(--lt-line-strong);
  border-radius: var(--lt-radius);
  cursor: pointer;
  transition: color 0.16s var(--lt-ease), background-color 0.16s var(--lt-ease), border-color 0.16s var(--lt-ease);
}

.lt-copy:hover {
  color: var(--lt-ink);
  background: var(--lt-gold);
  border-color: var(--lt-gold);
}

.lt-copy[data-copied] {
  color: var(--lt-ink);
  background: var(--lt-teal);
  border-color: var(--lt-teal);
}

.lt-footer__note {
  margin: 1rem 0 0;
  padding-left: 0.75rem;
  border-left: 2px solid var(--lt-red);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--lt-mist);
}

.lt-footer__base {
  width: 100%;
  max-width: var(--lt-max);
  margin-inline: auto;
  padding: 1.1rem var(--lt-gutter) 1.5rem;
  border-top: 1px solid var(--lt-line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  font-family: var(--lt-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--lt-mist);
}

.lt-footer__base p { margin: 0; font-size: inherit; color: inherit; }

.lt-footer__base-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

.lt-footer__base-links a {
  color: var(--lt-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--lt-ease), border-color 0.16s var(--lt-ease);
}

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

/* ---------- 返回顶部 ---------- */
.lt-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 45;
  padding: 0.6rem 0.9rem;
  font-family: var(--lt-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--lt-cream);
  background: var(--lt-ink-2);
  border: 1px solid var(--lt-line-strong);
  border-radius: var(--lt-radius);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s var(--lt-ease), transform 0.2s var(--lt-ease), visibility 0.2s, background-color 0.2s var(--lt-ease), border-color 0.2s var(--lt-ease), color 0.2s var(--lt-ease);
}

.lt-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lt-top:hover {
  color: var(--lt-paper);
  background: var(--lt-red);
  border-color: var(--lt-red-deep);
}

/* ---------- 响应式：平板 ---------- */
@media (max-width: 1024px) {
  .lt-nav-toggle { display: inline-flex; }

  .lt-header__coord { display: none; }

  .lt-brand__meta { display: none; }

  html[data-nav-open],
  html[data-nav-open] body {
    overflow: hidden;
  }

  .lt-navwrap {
    border-top: 0;
    background: transparent;
  }

  .lt-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 60;
    width: min(22rem, 88vw);
    padding: 5.6rem 1.3rem 2.5rem;
    background: linear-gradient(180deg, #241B1D 0%, #150F10 100%);
    border-left: 1px solid var(--lt-red);
    box-shadow: -30px 0 60px -32px rgba(0, 0, 0, 0.96);
    overflow-y: auto;
    overscroll-behavior: contain;
    transform: translateX(105%);
    transition: transform 0.28s var(--lt-ease);
  }

  .lt-nav[data-open] {
    transform: translateX(0);
  }

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

  .lt-nav__item {
    position: static;
    width: 100%;
  }

  .lt-nav__link {
    display: block;
    padding: 0.85rem 0.25rem;
    font-size: 1rem;
    letter-spacing: 0.12em;
    border-bottom: 1px solid var(--lt-line);
  }

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

  .lt-nav__link[aria-current="page"] {
    background: transparent;
    padding-left: 0.9rem;
  }

  .lt-nav__link[aria-current="page"]::before {
    top: 0.95rem;
    bottom: 0.95rem;
  }

  .lt-panel {
    position: static;
    min-width: 0;
    margin: 0.35rem 0 0.9rem;
    padding: 0.75rem 1rem 1rem;
    background: rgba(217, 164, 65, 0.06);
    border: 0;
    border-left: 2px solid rgba(217, 164, 65, 0.5);
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

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

  .lt-footer__brand {
    grid-column: 1 / -1;
  }
}

/* ---------- 响应式：手机 ---------- */
@media (max-width: 760px) {
  .lt-header__bar .lt-header__inner {
    min-height: 3.75rem;
    gap: 0.6rem;
  }

  .lt-header__act { gap: 0.5rem; }

  .lt-header__act .lt-btn--sm {
    padding: 0.45rem 0.7rem;
    font-size: 0.74rem;
    letter-spacing: 0.04em;
  }

  .lt-grid--2,
  .lt-grid--3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .lt-footer__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  .lt-footer__brand { grid-column: auto; }

  .lt-footer__base {
    flex-direction: column;
    align-items: flex-start;
  }

  .lt-top {
    right: 0.85rem;
    bottom: 0.85rem;
    padding: 0.55rem 0.75rem;
  }
}

@media (max-width: 420px) {
  .lt-brand__mark {
    width: 2rem;
    height: 2rem;
    font-size: 0.76rem;
  }

  .lt-brand__name { font-size: 0.98rem; }
}

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

  .lt-card:hover,
  .lt-btn:hover,
  .lt-brand:hover .lt-brand__mark {
    transform: none;
  }
}