/* ==========================================================================
   乐动在线官网 · Shared Site Kit
   /assets/site.css — reset / tokens / typography / header / footer / components
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; 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; padding: 0; cursor: pointer; }
input { font: inherit; color: inherit; }
[hidden] { display: none !important; }
::selection { background: var(--cyan-400); color: var(--ink-900); }

:root {
  --ink-900: #071426;
  --ink-800: #0C2136;
  --ink-700: #14324E;
  --path-500: #2A5578;
  --mist-300: #7A9AB8;
  --cyan-400: #46E3E6;
  --cyan-deep: #0E8189;
  --orange-500: #FF8A3D;
  --lime-400: #9BE86B;
  --white-050: #F2F7FA;
  --line-200: #C9D8E4;
  --ink-text: #28486a;

  --rail-w: 216px;
  --topbar-h: 52px;
  --content-max: 1120px;
  --gutter: 18px;
  --r-lg: 28px;
  --r-md: 20px;
  --r-sm: 14px;
  --r-pill: 999px;

  --font-display: "Oswald", "Barlow Condensed", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --shadow-panel: 0 26px 60px rgba(3, 10, 20, .55);
}

@media (min-width: 640px) { :root { --gutter: 26px; } }
@media (min-width: 1024px) { :root { --gutter: 40px; --topbar-h: 44px; } }

/* --------------------------------------------------------------------------
   基础排版与页面骨架
   -------------------------------------------------------------------------- */
body {
  min-height: 100vh;
  padding-top: var(--topbar-h);
  background: var(--ink-900);
  color: var(--white-050);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); font-size: 17px; }
}

body::before {
  content: "";
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .42;
  background-image: linear-gradient(90deg, rgba(42, 85, 120, .55) 1px, transparent 1px);
  background-size: 88px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), rgba(0, 0, 0, .1));
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), rgba(0, 0, 0, .1));
}
@media (min-width: 1024px) { body::before { left: var(--rail-w); } }

body[data-nav-locked="true"] { overflow: hidden; }

h1, h2, h3, h4 { line-height: 1.15; font-weight: 600; letter-spacing: -.01em; }
p { max-width: 46em; }

#main-content { position: relative; z-index: 1; display: block; }
.ld-header { display: block; }

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   跳转链接
   -------------------------------------------------------------------------- */
.ld-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 220;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--cyan-400);
  color: var(--ink-900);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  transform: translateY(-220%);
  transition: transform .18s var(--ease);
}
.ld-skip:focus { transform: translateY(0); }

/* --------------------------------------------------------------------------
   顶部联系横条
   -------------------------------------------------------------------------- */
.ld-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: linear-gradient(100deg, #050f1d 0%, #0C2136 52%, #050f1d 100%);
  border-bottom: 1px solid rgba(42, 85, 120, .85);
}
.ld-topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: var(--topbar-h);
  padding: 6px clamp(14px, 3vw, 26px);
}
.ld-topbar__call {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  max-width: none;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--white-050);
  white-space: nowrap;
}
.ld-topbar__brand {
  font-weight: 600;
  letter-spacing: .04em;
}
.ld-topbar__slogan {
  color: var(--mist-300);
  font-size: 11px;
  letter-spacing: .12em;
}
@media (max-width: 767px) { .ld-topbar__slogan { display: none; } }

.ld-topbar__actions { display: flex; align-items: center; gap: 10px; }

.ld-contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(70, 227, 230, .4);
  color: var(--white-050);
  font-size: 12px;
  letter-spacing: .06em;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.ld-contact-btn:hover { background: rgba(70, 227, 230, .14); border-color: var(--cyan-400); }
.ld-contact-btn[aria-expanded="true"] { background: rgba(70, 227, 230, .18); border-color: var(--cyan-400); }
.ld-contact-btn__k { color: var(--cyan-400); }
.ld-contact-btn__v { color: var(--mist-300); font-variant-numeric: tabular-nums; }
@media (max-width: 639px) { .ld-contact-btn__v { display: none; } }

.ld-nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(122, 154, 184, .5);
  color: var(--white-050);
  font-size: 12px;
  letter-spacing: .08em;
  transition: border-color .18s var(--ease), background .18s var(--ease), color .18s var(--ease);
}
.ld-nav-toggle::after {
  content: "";
  width: 14px;
  height: 8px;
  border-top: 2px solid var(--cyan-400);
  border-bottom: 2px solid var(--cyan-400);
  border-radius: 2px;
}
.ld-nav-toggle:hover { border-color: var(--cyan-400); }
.ld-nav-toggle[aria-expanded="true"] {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-900);
}
.ld-nav-toggle[aria-expanded="true"]::after { border-color: var(--ink-900); }
@media (min-width: 1024px) { .ld-nav-toggle { display: none; } }

/* 联系下拉面板 */
.ld-contact-panel {
  position: absolute;
  top: 100%;
  right: clamp(14px, 3vw, 26px);
  width: min(440px, calc(100vw - 28px));
  padding: 18px;
  background: var(--ink-800);
  border: 1px solid rgba(42, 85, 120, .9);
  border-radius: 0 0 var(--r-md) var(--r-md);
  box-shadow: var(--shadow-panel);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s linear;
}
.ld-contact-panel[data-open="true"] { opacity: 1; visibility: visible; transform: translateY(0); }
.ld-contact-panel__title {
  margin: 0 0 12px;
  max-width: none;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}
.ld-contact-panel__list { display: grid; margin: 0; }
.ld-contact-panel__row {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(42, 85, 120, .8);
}
.ld-contact-panel__row:last-child { border-bottom: 0; }
.ld-contact-panel__row dt { font-size: 11px; letter-spacing: .08em; color: var(--mist-300); }
.ld-contact-panel__row dd { margin: 0; font-size: 13px; color: var(--white-050); word-break: break-all; }
.ld-contact-panel .ld-btn { margin-top: 14px; }

/* --------------------------------------------------------------------------
   左侧轨道导航
   -------------------------------------------------------------------------- */
.ld-rail { display: none; }
@media (min-width: 1024px) {
  .ld-rail {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    bottom: 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: var(--rail-w);
    padding: 26px 16px 20px;
    background: linear-gradient(180deg, var(--ink-800), #08192b);
    border-right: 1px solid rgba(42, 85, 120, .85);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
}
.ld-rail__brand {
  display: grid;
  gap: 2px;
  padding: 0 8px 16px;
  border-bottom: 1px solid rgba(42, 85, 120, .7);
}
.ld-rail__mark {
  position: relative;
  width: 30px;
  height: 30px;
  margin-bottom: 10px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--cyan-400), #0e6d7d 78%);
  box-shadow: 0 0 22px rgba(70, 227, 230, .28);
}
.ld-rail__mark::after {
  content: "";
  position: absolute;
  left: 7px;
  right: 7px;
  top: 50%;
  height: 2px;
  border-radius: 2px;
  background: var(--ink-900);
  transform: translateY(-50%) rotate(-28deg);
}
.ld-rail__name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: .01em;
}
.ld-rail__sub {
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist-300);
}
.ld-rail__track {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 2px;
  background: rgba(42, 85, 120, .45);
  pointer-events: none;
}
.ld-rail__fill {
  display: block;
  width: 100%;
  height: 0;
  background: var(--cyan-400);
  box-shadow: 0 0 12px rgba(70, 227, 230, .8);
}
.ld-rail__foot {
  margin-top: auto;
  display: grid;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid rgba(42, 85, 120, .7);
}
.ld-rail__note { margin: 0; max-width: none; font-size: 11px; letter-spacing: .08em; color: var(--mist-300); }

/* --------------------------------------------------------------------------
   导航列表（轨道 + 抽屉共用）
   -------------------------------------------------------------------------- */
.ld-nav { display: flex; flex-direction: column; gap: 2px; }
.ld-nav__link {
  position: relative;
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 10px 8px 14px;
  border-radius: var(--r-sm);
  color: var(--mist-300);
  font-size: 14px;
  transition: background .18s var(--ease), color .18s var(--ease);
}
.ld-nav__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 2px;
  height: 0;
  border-radius: 2px;
  background: var(--cyan-400);
  transform: translateY(-50%);
  transition: height .18s var(--ease), box-shadow .18s var(--ease);
}
.ld-nav__link:hover,
.ld-nav__link:focus-visible { color: var(--white-050); background: var(--ink-700); }
.ld-nav__link:hover::before { height: 56%; }
.ld-nav__link[aria-current="page"] { color: var(--cyan-400); background: rgba(70, 227, 230, .09); }
.ld-nav__link[aria-current="page"]::before { height: 100%; box-shadow: 0 0 14px rgba(70, 227, 230, .65); }
.ld-nav__num {
  font-size: 11px;
  letter-spacing: .08em;
  font-variant-numeric: tabular-nums;
  color: rgba(122, 154, 184, .85);
}
.ld-nav__link[aria-current="page"] .ld-nav__num { color: var(--cyan-400); }
.ld-nav__label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.ld-nav--drawer { gap: 4px; }
.ld-nav--drawer .ld-nav__link {
  grid-template-columns: 34px 1fr;
  min-height: 52px;
  font-size: 16px;
  background: rgba(12, 33, 54, .7);
  border: 1px solid rgba(42, 85, 120, .55);
}
.ld-nav--drawer .ld-nav__link[aria-current="page"] { border-color: var(--cyan-400); }
.ld-nav--drawer .ld-nav__num { font-size: 12px; }

/* --------------------------------------------------------------------------
   移动抽屉
   -------------------------------------------------------------------------- */
.ld-drawer {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 130;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px var(--gutter) 32px;
  background: rgba(6, 17, 32, .97);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(42, 85, 120, .85);
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s linear;
}
.ld-drawer[data-open="true"] { opacity: 1; visibility: visible; transform: translateY(0); }
@media (min-width: 1024px) { .ld-drawer { display: none; } }

.ld-drawer__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.ld-drawer__title {
  margin: 0;
  max-width: none;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-400);
}
.ld-drawer__close {
  min-height: 40px;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(122, 154, 184, .5);
  font-size: 12px;
  letter-spacing: .08em;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.ld-drawer__close:hover { border-color: var(--cyan-400); color: var(--cyan-400); }
.ld-drawer__search { display: block; }
.ld-drawer__input {
  width: 100%;
  min-height: 46px;
  padding: 10px 16px;
  border-radius: var(--r-pill);
  background: var(--ink-800);
  border: 1px solid rgba(42, 85, 120, .85);
  color: var(--white-050);
  font-size: 14px;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.ld-drawer__input::placeholder { color: var(--mist-300); }
.ld-drawer__input:focus { border-color: var(--cyan-400); box-shadow: 0 0 0 3px rgba(70, 227, 230, .18); }
.ld-drawer__empty { margin: 0; max-width: none; font-size: 13px; color: var(--mist-300); }
.ld-drawer__foot {
  margin-top: auto;
  display: grid;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid rgba(42, 85, 120, .7);
}
.ld-drawer__note { margin: 0; max-width: none; font-size: 12px; color: var(--mist-300); word-break: break-all; }

/* --------------------------------------------------------------------------
   页内索引条 + 滚动进度
   -------------------------------------------------------------------------- */
.ld-pageindex {
  position: sticky;
  top: var(--topbar-h);
  z-index: 88;
  padding: 0 var(--gutter);
  background: rgba(7, 20, 38, .94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(42, 85, 120, .7);
}
.ld-pageindex:empty { display: none; }
.ld-pageindex__inner {
  display: flex;
  align-items: center;
  gap: 6px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 8px 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.ld-pageindex__inner::-webkit-scrollbar { display: none; }
.ld-pageindex__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  color: var(--mist-300);
  font-size: 11px;
  letter-spacing: .08em;
  white-space: nowrap;
  transition: color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}
.ld-pageindex__link:hover { color: var(--white-050); border-color: rgba(42, 85, 120, .9); }
.ld-pageindex__link[aria-current="true"] {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-900);
}
.ld-pageindex__num { font-variant-numeric: tabular-nums; opacity: .65; }

.ld-progressbar {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  z-index: 95;
  height: 2px;
  background: rgba(42, 85, 120, .45);
  pointer-events: none;
}
.ld-progressbar__fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--cyan-400);
  box-shadow: 0 0 10px rgba(70, 227, 230, .75);
}
@media (min-width: 1024px) { .ld-progressbar { display: none; } }

/* --------------------------------------------------------------------------
   布局容器与网格
   -------------------------------------------------------------------------- */
.ld-container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.ld-section { position: relative; padding: clamp(34px, 5.2vw, 76px) 0; }
.ld-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 24px);
}
.ld-grid > * { min-width: 0; }
[data-section] { scroll-margin-top: calc(var(--topbar-h) + 56px); }

/* --------------------------------------------------------------------------
   排版组件
   -------------------------------------------------------------------------- */
.ld-display {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 5.4vw, 72px);
  line-height: 1.02;
  letter-spacing: -.02em;
}
.ld-display--sm { font-size: clamp(26px, 3.2vw, 44px); }
.ld-eyebrow {
  margin: 0;
  max-width: none;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-400);
}
.ld-lead {
  margin: 0;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.7;
  color: var(--mist-300);
  max-width: 46em;
}
.ld-num {
  font-family: var(--font-display);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

/* --------------------------------------------------------------------------
   按钮 / 标签 / 状态点
   -------------------------------------------------------------------------- */
.ld-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  text-align: center;
  cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.ld-btn--primary { background: var(--cyan-400); color: var(--ink-900); }
.ld-btn--primary:hover { background: #6deef0; transform: translateY(-2px); }
.ld-btn--ghost { border-color: rgba(122, 154, 184, .5); color: var(--white-050); }
.ld-btn--ghost:hover { border-color: var(--cyan-400); color: var(--cyan-400); }
.ld-btn--sm { min-height: 36px; padding: 7px 15px; font-size: 12px; }
.ld-btn--block { width: 100%; }

.ld-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(122, 154, 184, .45);
  color: var(--mist-300);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.ld-tag--cyan { border-color: rgba(70, 227, 230, .5); color: var(--cyan-400); }
.ld-tag--lime { border-color: rgba(155, 232, 107, .5); color: var(--lime-400); }
.ld-tag--orange { border-color: rgba(255, 138, 61, .5); color: var(--orange-500); }
.ld-tag--solid { background: var(--cyan-400); border-color: transparent; color: var(--ink-900); }

.ld-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.ld-dot--cyan { background: var(--cyan-400); box-shadow: 0 0 0 3px rgba(70, 227, 230, .18); }
.ld-dot--lime { background: var(--lime-400); box-shadow: 0 0 0 3px rgba(155, 232, 107, .18); }
.ld-dot--orange { background: var(--orange-500); box-shadow: 0 0 0 3px rgba(255, 138, 61, .18); }

/* --------------------------------------------------------------------------
   档案卡
   -------------------------------------------------------------------------- */
.ld-index-card {
  position: relative;
  display: block;
  padding: 22px 22px 20px;
  background: var(--ink-800);
  border: 1px solid rgba(42, 85, 120, .75);
  border-radius: var(--r-md);
  opacity: .94;
  transition: transform .18s var(--ease), opacity .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}
.ld-index-card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 22px;
  bottom: 22px;
  width: 2px;
  border-radius: 2px;
  background: var(--path-500);
  transition: background .18s var(--ease), box-shadow .18s var(--ease);
}
.ld-index-card:hover,
.ld-index-card:focus-within {
  transform: translateY(-4px);
  opacity: 1;
  background: var(--ink-700);
  border-color: rgba(70, 227, 230, .55);
}
.ld-index-card:hover::before,
.ld-index-card:focus-within::before { background: var(--cyan-400); box-shadow: 0 0 14px rgba(70, 227, 230, .6); }
.ld-index-card__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.ld-index-card__num {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan-400);
}
.ld-index-card__title { margin: 12px 0 0; font-size: 19px; font-weight: 600; letter-spacing: -.01em; }
.ld-index-card__meta { margin: 8px 0 0; max-width: 36em; font-size: 14px; color: var(--mist-300); }
.ld-index-card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed rgba(42, 85, 120, .8);
}
.ld-index-card--light {
  background: #fff;
  border-color: var(--line-200);
  color: var(--ink-900);
  opacity: 1;
}
.ld-index-card--light::before { background: var(--line-200); }
.ld-index-card--light .ld-index-card__meta { color: #41607a; }
.ld-index-card--light .ld-index-card__foot { border-top-color: var(--line-200); }
.ld-index-card--light:hover { background: #fff; border-color: var(--cyan-deep); }
.ld-index-card--light:hover::before { background: var(--cyan-deep); box-shadow: none; }

/* --------------------------------------------------------------------------
   图片容器基础规则（页面阶段放置图片 / 占位）
   -------------------------------------------------------------------------- */
.ld-media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid rgba(42, 85, 120, .7);
  background: linear-gradient(140deg, var(--ink-700), var(--ink-900) 72%);
}
.ld-media img,
.ld-media video { width: 100%; height: 100%; object-fit: cover; }
.ld-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 55%, rgba(7, 20, 38, .55));
}
.ld-media--wide { aspect-ratio: 21 / 9; }
.ld-media--tall { aspect-ratio: 3 / 4; }
.ld-media--square { aspect-ratio: 1 / 1; }
.ld-media--light { border-color: var(--line-200); background: linear-gradient(140deg, #dce7ef, #f7fbfd); }
.ld-media__caption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 2;
  margin: 0;
  max-width: none;
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--white-050);
}

/* --------------------------------------------------------------------------
   面包屑 / 路径线
   -------------------------------------------------------------------------- */
.ld-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--mist-300);
}
.ld-breadcrumb a { color: var(--mist-300); }
.ld-breadcrumb a:hover { color: var(--cyan-400); }
.ld-breadcrumb__sep { color: var(--path-500); }

.ld-trace {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-400), rgba(70, 227, 230, 0));
  transform-origin: left center;
}
.ld-trace.is-in { animation: ld-trace-grow .6s var(--ease) both; }
@keyframes ld-trace-grow {
  from { transform: scaleX(.08); opacity: .2; }
  to { transform: scaleX(1); opacity: 1; }
}

[data-reveal].is-in { animation: ld-rise .6s var(--ease) both; }
@keyframes ld-rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */
.ld-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(40px, 6vw, 88px);
  background: var(--white-050);
  color: var(--ink-900);
  border-top: 1px solid var(--line-200);
}
.ld-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(26px, 3.6vw, 46px) var(--gutter) 0;
}
.ld-footer__grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 768px) { .ld-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1180px) { .ld-footer__grid { grid-template-columns: 1.25fr 1fr 1fr; } }

.ld-footer__card {
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line-200);
  border-radius: var(--r-md);
}
.ld-footer__card--brand {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.ld-footer__brandblock { min-width: 160px; }
.ld-footer__brand {
  margin: 0;
  max-width: none;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink-900);
}
.ld-footer__tagline { margin: 8px 0 0; max-width: 22em; font-size: 13px; line-height: 1.65; color: #456883; }
.ld-footer__rhythm { display: grid; gap: 6px; justify-items: start; }
@media (min-width: 480px) { .ld-footer__rhythm { justify-items: end; text-align: right; } }
.ld-rhythm__label {
  margin: 0;
  max-width: none;
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #5a7288;
}
.ld-rhythm { display: flex; align-items: flex-end; gap: 4px; height: 20px; }
.ld-rhythm__bar { width: 5px; height: 9px; border-radius: 3px; background: var(--line-200); }
.ld-rhythm__bar.is-on { height: 16px; background: var(--ink-700); }
.ld-rhythm__bar.is-now { height: 20px; background: var(--cyan-deep); }
.ld-rhythm__note { margin: 0; max-width: none; font-size: 11px; letter-spacing: .04em; color: #5a7288; }

.ld-footer__title {
  margin: 0 0 8px;
  max-width: none;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #5a7288;
}
.ld-footer__list { display: flex; flex-direction: column; }
.ld-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 40px;
  font-size: 14px;
  color: var(--ink-text);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease), padding-left .18s var(--ease);
}
.ld-footer__link::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--line-200);
  transition: background .18s var(--ease);
}
.ld-footer__link:hover { color: var(--ink-900); border-bottom-color: var(--cyan-deep); padding-left: 4px; }
.ld-footer__link:hover::before { background: var(--cyan-deep); }

.ld-footer__rows { display: grid; margin: 0; }
.ld-footer__row {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line-200);
}
.ld-footer__row:last-child { border-bottom: 0; }
.ld-footer__row dt { font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: #5a7288; }
.ld-footer__row dd { margin: 0; font-size: 13px; color: var(--ink-text); word-break: break-all; }
.ld-footer__note { margin: 14px 0 0; max-width: 34em; font-size: 12px; line-height: 1.65; color: #5a7288; }

.ld-legal { margin-top: clamp(24px, 3.4vw, 40px); background: var(--ink-900); color: var(--mist-300); }
.ld-legal__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 14px var(--gutter);
  font-size: 12px;
  letter-spacing: .04em;
}
.ld-legal__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  margin: 0;
  max-width: none;
}
.ld-legal__sep { color: var(--path-500); }

/* --------------------------------------------------------------------------
   动效降级
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }
  html { scroll-behavior: auto; }
  .ld-index-card:hover,
  .ld-index-card:focus-within,
  .ld-btn--primary:hover { transform: none; }
}