@charset "utf-8";
/* ==========================================================================
   鼎上娱乐 · layout.css
   结构：固定左侧索引栏 + 轻量工具条 + 编辑式正文栏 + 深色页脚
   与历史模板的「顶部导航 + 卡片流」结构不同：本模板以左侧目录栏为主骨架
   ========================================================================== */

/* ---------- 左侧索引栏 ---------- */
.ds-rail {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  z-index: 70;
  display: flex;
  flex-direction: column;
  gap: 26px;
  padding: 30px 26px 24px;
  background: var(--ink);
  color: #e9ede2;
  border-right: 1px solid var(--line-ink);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.ds-rail::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 220px;
  background: radial-gradient(120% 80% at 0% 100%, rgba(27, 70, 240, 0.38), transparent 68%);
  pointer-events: none;
}

.ds-rail > * {
  position: relative;
  z-index: 1;
}

.ds-rail__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.ds-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
}

.ds-brand__mark {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border: 1px solid rgba(217, 243, 107, 0.55);
  color: var(--lime);
  display: grid;
  place-items: center;
}

.ds-brand__mark svg {
  width: 24px;
  height: 24px;
}

.ds-brand__txt strong {
  display: block;
  font-size: 1rem;
  font-weight: 620;
  letter-spacing: 0.04em;
  line-height: 1.3;
}

.ds-brand__txt em {
  display: block;
  margin-top: 3px;
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  color: rgba(233, 237, 226, 0.5);
}

.ds-rail__close {
  display: none;
  width: 34px;
  height: 34px;
  color: #e9ede2;
  border: 1px solid var(--line-ink);
  font-size: 1.1rem;
  line-height: 1;
}

.ds-rail__label {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(233, 237, 226, 0.42);
  padding-bottom: 10px;
}

.ds-nav {
  display: flex;
  flex-direction: column;
}

.ds-nav a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  font-size: 0.9rem;
  color: rgba(233, 237, 226, 0.74);
  border-top: 1px solid var(--line-ink);
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.ds-nav a:last-child {
  border-bottom: 1px solid var(--line-ink);
}

.ds-nav a span {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: rgba(233, 237, 226, 0.36);
  transition: color 0.25s var(--ease);
}

.ds-nav a:hover,
.ds-nav a[aria-current="page"] {
  color: var(--lime);
  padding-left: 6px;
}

.ds-nav a:hover span,
.ds-nav a[aria-current="page"] span {
  color: var(--lime);
}

.ds-nav a[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 50%;
  width: 3px;
  height: 13px;
  margin-top: -6.5px;
  background: var(--lime);
}

.ds-rail__foot {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line-ink);
  font-size: 0.8rem;
  line-height: 1.8;
  color: rgba(233, 237, 226, 0.62);
}

.ds-rail__foot a {
  color: #e9ede2;
  border-bottom: 1px solid rgba(233, 237, 226, 0.28);
}

.ds-rail__foot a:hover {
  color: var(--lime);
  border-color: var(--lime);
}

.ds-rail__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 9px 14px;
  background: var(--lime);
  color: var(--ink) !important;
  border: 0 !important;
  font-weight: 600;
  font-size: 0.8rem;
}

.ds-rail__cta:hover {
  background: #e6fb8b;
}

/* ---------- 主区域骨架 ---------- */
.ds-shell {
  margin-left: var(--rail-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.ds-wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.ds-main {
  flex: 1 0 auto;
}

/* ---------- 工具条 ---------- */
.ds-utilbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 54px;
  padding: 0 var(--pad);
  background: rgba(244, 244, 239, 0.86);
  border-bottom: 1px solid var(--line);
}

@supports ((backdrop-filter: blur(8px)) or (-webkit-backdrop-filter: blur(8px))) {
  .ds-utilbar {
    -webkit-backdrop-filter: saturate(150%) blur(10px);
    backdrop-filter: saturate(150%) blur(10px);
  }
}

.ds-utilbar__menu {
  display: none;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
}

.ds-utilbar__menu i {
  display: block;
  width: 15px;
  height: 1px;
  background: var(--ink);
  box-shadow: 0 5px 0 var(--ink), 0 -5px 0 var(--ink);
}

.ds-crumb {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ds-crumb b {
  font-weight: 500;
  color: var(--ink-2);
}

.ds-crumb i {
  font-style: normal;
  padding: 0 8px;
  color: var(--line-2);
}

.ds-utilbar__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
}

.ds-utilbar__link:hover {
  color: var(--blue);
  border-color: var(--blue);
}

/* ---------- 章节与栅格 ---------- */
.ds-sec {
  padding: 74px 0;
  border-top: 1px solid var(--line);
}

.ds-sec--tight {
  padding: 52px 0;
}

.ds-sec--flush {
  border-top: 0;
  padding-top: 56px;
}

.ds-sec--dark {
  background: var(--ink);
  color: #e9ede2;
  border-top: 0;
}

.ds-sec--dark .ds-sec__lead,
.ds-sec--dark .ds-lead {
  color: rgba(233, 237, 226, 0.68);
}

.ds-sec--dark .ds-sec__num {
  color: rgba(217, 243, 107, 0.75);
}

.ds-sec--dark .ds-eyebrow {
  color: rgba(217, 243, 107, 0.7);
}

.ds-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding-bottom: 22px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.ds-sec--dark .ds-head {
  border-color: var(--line-ink);
}

.ds-head__num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--blue);
  flex: 0 0 auto;
  padding-top: 4px;
}

.ds-head__body {
  flex: 1 1 auto;
}

.ds-head__body h2 {
  margin-top: 6px;
}

.ds-head__aside {
  flex: 0 0 auto;
  font-size: 0.82rem;
  color: var(--muted);
  max-width: 260px;
  text-align: right;
}

.ds-sec--dark .ds-head__aside {
  color: rgba(233, 237, 226, 0.6);
}

.ds-cols {
  display: grid;
  gap: 22px;
}

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

.ds-cols--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ds-cols--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.ds-cols--aside {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 52px;
}

.ds-stack {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ---------- 页脚 ---------- */
.ds-foot {
  margin-top: auto;
  background: var(--ink);
  color: rgba(233, 237, 226, 0.66);
  padding: 56px 0 26px;
  border-top: 1px solid var(--line-ink);
}

.ds-foot a {
  color: rgba(233, 237, 226, 0.82);
}

.ds-foot a:hover {
  color: var(--lime);
}

.ds-foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 0.72fr));
  gap: 34px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line-ink);
}

.ds-foot__brand {
  color: #f0f3ea;
  font-size: 1.02rem;
  font-weight: 620;
  letter-spacing: 0.04em;
}

.ds-foot__desc {
  margin-top: 12px;
  max-width: 340px;
  font-size: 0.82rem;
  line-height: 1.85;
}

.ds-foot h4 {
  color: #f0f3ea;
  font-size: 0.76rem;
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.ds-foot li {
  font-size: 0.82rem;
  line-height: 2;
}

.ds-foot__base {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  font-size: 0.72rem;
  line-height: 1.8;
  color: rgba(233, 237, 226, 0.48);
}

.ds-foot__base p {
  max-width: 720px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  :root {
    --pad: 44px;
  }
  .ds-cols--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  :root {
    --rail-w: 0px;
    --pad: 32px;
  }

  .ds-rail {
    width: min(320px, 86vw);
    transform: translateX(-102%);
    transition: transform 0.36s var(--ease);
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.45);
  }

  .ds-rail.is-open {
    transform: none;
  }

  .ds-rail__close {
    display: grid;
    place-items: center;
  }

  .ds-shell {
    margin-left: 0;
  }

  .ds-utilbar__menu {
    display: inline-flex;
  }

  .ds-cols--aside {
    grid-template-columns: 1fr;
    gap: 34px;
  }

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

  .ds-head__aside {
    display: none;
  }

  .ds-foot__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

@media (max-width: 700px) {
  :root {
    --pad: 20px;
  }

  body {
    font-size: 15px;
    line-height: 1.76;
  }

  .ds-sec {
    padding: 52px 0;
  }

  .ds-head {
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 26px;
  }

  .ds-head__body h2 {
    margin-top: 4px;
  }

  .ds-cols--2,
  .ds-cols--3,
  .ds-cols--4 {
    grid-template-columns: 1fr;
  }

  .ds-foot__grid {
    grid-template-columns: 1fr;
  }

  .ds-utilbar {
    height: 50px;
    padding: 0 20px;
  }

  .ds-utilbar__link {
    font-size: 0.76rem;
  }
}