/* ==========================================================================
   HASH GAME · wire/grid.css
   Section 1 —— 站点骨架：顶栏 / 导航 / 页头 / 分节 / 页脚 / 回顶
   ========================================================================== */

/* ===== SECTION: shell ===== */

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ---------- 顶部状态条 ---------- */
.hx-top {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(236, 238, 239, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hx-line);
}

.hx-top::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--hx-signal) 0 22%, var(--hx-ink) 22% 74%, var(--hx-teal) 74% 100%);
}

.hx-top__bar {
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: var(--hx-wrap);
  margin-inline: auto;
  padding: 7px var(--hx-gut);
  border-bottom: 1px solid var(--hx-line-soft);
  font-family: var(--hx-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--hx-mute);
}

.hx-top__mark {
  color: var(--hx-ink);
}

.hx-top__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hx-top__status i {
  width: 6px;
  height: 6px;
  background: var(--hx-teal);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(12, 107, 100, 0.15);
  animation: hx-pulse 2.4s ease-in-out infinite;
}

.hx-top__meta {
  margin-left: auto;
  color: var(--hx-ink);
}

@keyframes hx-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ---------- 主导航 ---------- */
.hx-top__main {
  display: flex;
  align-items: center;
  gap: 28px;
  max-width: var(--hx-wrap);
  margin-inline: auto;
  padding: 0 var(--hx-gut);
  height: 76px;
}

.hx-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.hx-logo__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--hx-ink);
  color: var(--hx-sheet);
  font-family: var(--hx-mono);
  font-size: 1.32rem;
  font-weight: 700;
  line-height: 1;
}

.hx-logo__txt {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.15;
}

.hx-logo__txt b {
  font-size: 1.02rem;
  letter-spacing: 0.02em;
}

.hx-logo__txt em {
  font-family: var(--hx-mono);
  font-style: normal;
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  color: var(--hx-faint);
  text-transform: uppercase;
}

.hx-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.hx-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 9px 11px;
  font-size: 0.875rem;
  color: var(--hx-ink-2);
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.hx-nav a i {
  font-family: var(--hx-mono);
  font-style: normal;
  font-size: 0.5625rem;
  letter-spacing: 0.08em;
  color: var(--hx-faint);
}

.hx-nav a:hover {
  color: var(--hx-ink);
  background: rgba(16, 21, 25, 0.04);
}

.hx-nav a.is-active {
  color: var(--hx-ink);
  border-bottom-color: var(--hx-signal);
}

.hx-nav a.is-active i {
  color: var(--hx-signal);
}

.hx-nav__cta {
  margin-left: 10px;
  padding: 10px 16px !important;
  background: var(--hx-signal);
  color: #fff !important;
  border-bottom: 0 !important;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

.hx-nav__cta:hover {
  background: #b92f14 !important;
}

.hx-burger {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border: 1px solid var(--hx-line);
  background: var(--hx-sheet);
  position: relative;
}

.hx-burger span {
  position: absolute;
  left: 11px;
  width: 18px;
  height: 2px;
  background: var(--hx-ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hx-burger span:first-child { top: 15px; }
.hx-burger span:last-child { top: 23px; }

.hx-burger[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.hx-burger[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* ---------- 页面主体 ---------- */
.hx-page {
  padding-bottom: var(--hx-pad-sec);
}

/* 子页页头 */
.hx-head {
  position: relative;
  border-bottom: 1px solid var(--hx-line);
  background:
    linear-gradient(180deg, rgba(250, 250, 248, 0.9), rgba(250, 250, 248, 0.35));
}

.hx-head__inner {
  max-width: var(--hx-wrap);
  margin-inline: auto;
  padding: 42px var(--hx-gut) 46px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: end;
}

.hx-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-family: var(--hx-mono);
  font-size: var(--hx-fs-xs);
  letter-spacing: 0.1em;
  color: var(--hx-faint);
}

.hx-crumb a:hover {
  color: var(--hx-signal);
}

.hx-crumb span[aria-current] {
  color: var(--hx-ink);
}

.hx-head h1 {
  font-size: clamp(2.1rem, 3.8vw, 3.25rem);
  margin-bottom: 16px;
}

.hx-head__lede {
  max-width: 62ch;
  color: var(--hx-ink-2);
}

.hx-head__spec {
  border-left: 2px solid var(--hx-signal);
  padding-left: 20px;
}

.hx-head__spec li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dotted var(--hx-line);
  font-size: var(--hx-fs-sm);
}

.hx-head__spec li:last-child {
  border-bottom: 0;
}

.hx-head__spec span:first-child {
  font-family: var(--hx-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--hx-mute);
}

.hx-head__spec span:last-child {
  color: var(--hx-ink);
  font-weight: 600;
  text-align: right;
}

/* ---------- 分节 ---------- */
.hx-sec {
  max-width: var(--hx-wrap);
  margin-inline: auto;
  padding: var(--hx-pad-sec) var(--hx-gut) 0;
}

.hx-sec--flush {
  padding-top: clamp(36px, 5vw, 64px);
}

.hx-sec__head {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr) 300px;
  gap: 28px;
  align-items: start;
  padding-bottom: 28px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--hx-line);
}

.hx-sec__idx {
  font-family: var(--hx-mono);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--hx-ink);
  letter-spacing: -0.04em;
}

.hx-sec__idx::after {
  content: "";
  display: block;
  width: 34px;
  height: 3px;
  margin-top: 12px;
  background: var(--hx-signal);
}

.hx-sec__head h2 {
  margin-top: 6px;
}

.hx-sec__note {
  font-size: var(--hx-fs-sm);
  color: var(--hx-mute);
  border-left: 1px solid var(--hx-line);
  padding-left: 18px;
  align-self: end;
}

/* 网格 */
.hx-grid {
  display: grid;
  gap: 1px;
  background: var(--hx-line);
  border: 1px solid var(--hx-line);
}

.hx-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.hx-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.hx-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.hx-split {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

/* ---------- 深色带 ---------- */
.hx-band {
  position: relative;
  margin-top: var(--hx-pad-sec);
  background: var(--hx-deep);
  color: #c3cbd1;
  border-top: 1px solid var(--hx-deep);
  overflow: hidden;
}

.hx-band--flush {
  margin-top: 0;
}

.hx-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

.hx-band__inner {
  position: relative;
  max-width: var(--hx-wrap);
  margin-inline: auto;
  padding: clamp(48px, 6vw, 82px) var(--hx-gut);
}

.hx-band h2,
.hx-band h3 {
  color: #f4f6f7;
}

.hx-band .hx-sec__head {
  border-bottom-color: var(--hx-line-deep);
  margin-bottom: 30px;
}

.hx-band .hx-sec__idx {
  color: #f4f6f7;
}

.hx-band .hx-sec__note {
  border-left-color: var(--hx-line-deep);
  color: #94a0a9;
}

/* ---------- 页脚 ---------- */
.hx-foot {
  margin-top: auto;
  background: var(--hx-deep);
  color: #9aa6af;
  border-top: 4px solid var(--hx-signal);
}

.hx-foot__grid {
  max-width: var(--hx-wrap);
  margin-inline: auto;
  padding: 54px var(--hx-gut) 34px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
}

.hx-foot__brand .hx-logo__mark {
  background: #f4f6f7;
  color: var(--hx-deep);
}

.hx-foot__brand .hx-logo__txt b {
  color: #f4f6f7;
}

.hx-foot__brand p {
  margin-top: 18px;
  max-width: 34ch;
  font-size: var(--hx-fs-sm);
  line-height: 1.8;
  color: #8e9aa3;
}

.hx-foot__col h2 {
  font-family: var(--hx-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #f4f6f7;
  margin-bottom: 16px;
}

.hx-foot__col ul {
  display: grid;
  gap: 9px;
  font-size: var(--hx-fs-sm);
}

.hx-foot__col a {
  color: #9aa6af;
  transition: color 0.18s ease;
}

.hx-foot__col a:hover {
  color: #fff;
}

.hx-foot__legal {
  max-width: var(--hx-wrap);
  margin-inline: auto;
  padding: 20px var(--hx-gut) 40px;
  border-top: 1px solid var(--hx-line-deep);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  font-size: 0.75rem;
  line-height: 1.7;
  color: #7d8992;
}

.hx-foot__legal li {
  position: relative;
  padding-left: 12px;
}

.hx-foot__legal li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 4px;
  height: 4px;
  background: var(--hx-signal);
}

.hx-foot__legal li:first-child {
  padding-left: 0;
  color: #a8b3bb;
}

.hx-foot__legal li:first-child::before {
  display: none;
}

/* ---------- 回顶 ---------- */
.hx-backtop {
  position: fixed;
  right: 20px;
  bottom: 22px;
  z-index: 80;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--hx-ink);
  color: #fff;
  font-family: var(--hx-mono);
  font-size: 0.75rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}

.hx-backtop.is-on {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.hx-backtop:hover {
  background: var(--hx-signal);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hx-sec__head {
    grid-template-columns: 64px minmax(0, 1fr);
  }

  .hx-sec__note {
    grid-column: 2;
    border-left: 0;
    padding-left: 0;
    margin-top: 4px;
  }

  .hx-head__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

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

@media (max-width: 940px) {
  :root {
    --hx-gut: 20px;
  }

  .hx-top__bar {
    gap: 14px;
    font-size: 0.625rem;
    letter-spacing: 0.1em;
  }

  .hx-top__meta {
    display: none;
  }

  .hx-burger {
    display: block;
  }

  .hx-top__main {
    height: 66px;
    gap: 12px;
  }

  .hx-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 22px;
    background: var(--hx-paper);
    border-bottom: 1px solid var(--hx-line);
    box-shadow: 0 18px 30px rgba(16, 21, 25, 0.12);
  }

  .hx-nav.is-open {
    display: flex;
  }

  .hx-nav a {
    padding: 13px 4px;
    border-bottom: 1px solid var(--hx-line-soft);
  }

  .hx-nav a.is-active {
    border-bottom-color: var(--hx-line-soft);
    color: var(--hx-signal);
  }

  .hx-nav__cta {
    margin: 14px 0 0;
    justify-content: center;
    border-bottom: 0 !important;
  }

  .hx-head__inner {
    padding-top: 30px;
    padding-bottom: 34px;
  }

  .hx-grid--3,
  .hx-grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hx-split {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .hx-grid--2,
  .hx-grid--3,
  .hx-grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }

  .hx-sec__head {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .hx-sec__idx {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .hx-sec__idx::after {
    margin-top: 0;
    width: 26px;
  }

  .hx-sec__note {
    grid-column: 1;
  }

  .hx-foot__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 40px;
  }

  .hx-foot__legal {
    gap: 8px 18px;
  }

  .hx-foot__legal li {
    width: 100%;
  }

  .hx-backtop {
    right: 14px;
    bottom: 14px;
  }
}