/* =========================================================
   63棋牌电玩 · 共享外壳样式 /assets/site.css
   夜墨绿底 · 牌桌深绿分区 · 琥珀金行动 · 电光青与霓虹紫状态
   ========================================================= */

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

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

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

ul, ol { list-style: none; }

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

a { color: inherit; }

/* ---------- 2. Design tokens ---------- */
:root {
  /* 色板 */
  --ink: #061A14;
  --ink-deep: #04120E;
  --table: #0C2B22;
  --felt: #174A3A;
  --felt-soft: #1E5A47;
  --gold: #F4B84A;
  --gold-soft: #FFE3A3;
  --gold-deep: #D99A2B;
  --cyan: #27D3E0;
  --violet: #8A63FF;
  --mist: #E9F4EE;
  --sage: #8FA79D;
  --coral: #FF7C6B;

  /* 线条与层次 */
  --line: rgba(233, 244, 238, 0.14);
  --line-soft: rgba(233, 244, 238, 0.08);
  --line-gold: rgba(244, 184, 74, 0.34);
  --line-gold-strong: rgba(244, 184, 74, 0.62);

  /* 字体 */
  --font-display: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC",
    "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, monospace;

  /* 节奏 */
  --shell: 1240px;
  --gutter: 3rem;
  --cut: 18px;
  --dur: 200ms;
  --dur-fast: 160ms;
  --ease: cubic-bezier(0.22, 0.8, 0.28, 1);
}

/* ---------- 3. 中文排版基座 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(78rem 36rem at 10% -12%, rgba(39, 211, 224, 0.10), transparent 62%),
    radial-gradient(64rem 32rem at 94% 2%, rgba(138, 99, 255, 0.11), transparent 64%),
    repeating-linear-gradient(135deg, rgba(233, 244, 238, 0.022) 0 1px, transparent 1px 9px);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

p { text-wrap: pretty; }

::selection {
  background: rgba(244, 184, 74, 0.85);
  color: #161003;
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 1px;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

/* ---------- 4. 通用容器与版面 ---------- */
.container {
  width: min(var(--shell), calc(100% - var(--gutter)));
  margin-inline: auto;
}

.section {
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.section-head {
  display: grid;
  gap: 0.85rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
  max-width: 62ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 1.7rem;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(39, 211, 224, 0));
}

.display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 5.4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  color: var(--mist);
}

.display em {
  font-style: normal;
  color: var(--gold);
}

.lede {
  font-size: clamp(1rem, 1.25vw, 1.15rem);
  line-height: 1.78;
  color: #C8DCD2;
  max-width: 62ch;
}

.rule-line {
  height: 2px;
  border: 0;
  background: linear-gradient(90deg, var(--gold), rgba(244, 184, 74, 0.1) 55%, transparent);
  transform: skewX(-24deg);
  transform-origin: left;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1.4rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-decoration: none;
  border: 1px solid transparent;
  background: var(--gold);
  color: #1A1204;
  box-shadow: 5px 5px 0 0 rgba(244, 184, 74, 0.24);
  transition:
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.btn:hover,
.btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 0 rgba(244, 184, 74, 0.3);
  background: var(--gold-soft);
}

.btn--gold {
  background: linear-gradient(150deg, var(--gold-soft), var(--gold) 58%, var(--gold-deep));
  color: #1A1204;
}

.btn--ghost {
  background: transparent;
  color: var(--gold-soft);
  border-color: var(--line-gold-strong);
  box-shadow: 5px 5px 0 0 rgba(23, 74, 58, 0.55);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(244, 184, 74, 0.12);
  color: var(--gold-soft);
  box-shadow: 8px 8px 0 0 rgba(23, 74, 58, 0.75);
}

/* ---------- 6. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -6rem;
  z-index: 300;
  padding: 0.7rem 1.15rem;
  background: var(--gold);
  color: #161003;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.9rem;
  text-decoration: none;
  transition: top var(--dur-fast) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 0.55rem;
}

/* =========================================================
   7. 页头
   ========================================================= */
.site-header {
  position: relative;
  z-index: 60;
  background:
    radial-gradient(120% 150% at 50% -30%, rgba(39, 211, 224, 0.16), transparent 62%),
    linear-gradient(180deg, #08241C 0%, #061A14 100%);
  border-bottom: 1px solid var(--line-gold);
}

/* 7.1 顶部状态条 */
.header-strip {
  background: linear-gradient(
    90deg,
    rgba(138, 99, 255, 0.18),
    rgba(6, 26, 20, 0.35) 46%,
    rgba(39, 211, 224, 0.16)
  );
  border-bottom: 1px solid var(--line-soft);
}

.header-strip__inner {
  width: min(var(--shell), calc(100% - var(--gutter)));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.4rem;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sage);
}

.header-strip__tags {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.header-strip__tag {
  color: #A9C4B9;
}

.header-strip__sep {
  color: rgba(233, 244, 238, 0.24);
}

.header-strip__note {
  color: rgba(244, 184, 74, 0.82);
  white-space: nowrap;
}

/* 7.2 刊头 */
.masthead__inner {
  position: relative;
  width: min(var(--shell), calc(100% - var(--gutter)));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.25rem;
  padding-block: 1.15rem 1rem;
}

.masthead__aside {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sage);
}

.masthead__aside--right {
  justify-content: flex-end;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.masthead__kicker {
  color: rgba(39, 211, 224, 0.85);
  white-space: nowrap;
}

.masthead__rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-gold), transparent);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  justify-self: center;
  text-decoration: none;
  color: var(--mist);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #1A1204;
  background: linear-gradient(150deg, var(--gold-soft), var(--gold) 56%, var(--gold-deep));
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  box-shadow: 0 10px 28px rgba(244, 184, 74, 0.22);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.brand:hover .brand__mark {
  transform: translateY(-1px);
  box-shadow: 0 14px 34px rgba(244, 184, 74, 0.34);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.38rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  transition: color var(--dur) var(--ease);
}

.brand:hover .brand__name,
.brand:focus-visible .brand__name {
  color: var(--gold-soft);
}

.brand__line {
  margin-top: 0.24rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sage);
}

/* 快入口 */
.chip-link {
  display: inline-flex;
  align-items: center;
  padding: 0.36rem 0.72rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--gold-soft);
  border: 1px solid var(--line-gold);
  background: linear-gradient(180deg, rgba(244, 184, 74, 0.14), rgba(244, 184, 74, 0.04));
  transition:
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.chip-link:hover,
.chip-link:focus-visible {
  background: var(--gold);
  border-color: var(--gold-soft);
  color: #1A1204;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(244, 184, 74, 0.28);
}

/* 7.3 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.48rem 0.8rem;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold-soft);
  border: 1px solid var(--line-gold);
  background: rgba(12, 43, 34, 0.7);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: rgba(244, 184, 74, 0.16);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 16px;
  height: 12px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transform-origin: center;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease);
}

[data-open="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

[data-open="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

[data-open="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* 7.4 目录式导航 */
.site-nav {
  position: relative;
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(12, 43, 34, 0.92), rgba(6, 26, 20, 0.72));
}

.site-nav::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-gold-strong) 30%, rgba(39, 211, 224, 0.5) 70%, transparent);
  pointer-events: none;
}

.site-nav__list {
  width: min(var(--shell), calc(100% - var(--gutter)));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 0.15rem;
  padding-block: 0.15rem;
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.82rem 1.05rem 0.95rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: 0.5rem;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--gold) 55%, var(--violet));
  transform: scaleX(0) skewX(-14deg);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.site-nav__num {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--sage);
  transition: color var(--dur) var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--gold-soft);
  background: linear-gradient(180deg, rgba(23, 74, 58, 0.72), rgba(23, 74, 58, 0));
}

.site-nav__link:hover .site-nav__num,
.site-nav__link:focus-visible .site-nav__num {
  color: var(--cyan);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1) skewX(-14deg);
}

.site-nav__link[aria-current="page"] {
  color: var(--gold-soft);
  background: linear-gradient(180deg, rgba(244, 184, 74, 0.12), rgba(244, 184, 74, 0));
}

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

/* 7.5 滚动进度光带 */
.scroll-meter {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 2px;
  background: rgba(233, 244, 238, 0.07);
  pointer-events: none;
}

.scroll-meter__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--gold) 68%, var(--violet));
  box-shadow: 0 0 12px rgba(39, 211, 224, 0.5);
}

/* =========================================================
   8. 共用基础组件
   ========================================================= */

/* 8.1 栅格 */
.grid {
  display: grid;
  gap: 1.25rem;
}

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

/* 8.2 切角面板 */
.cut-panel {
  position: relative;
  padding: clamp(1.1rem, 2.2vw, 1.6rem);
  background: linear-gradient(158deg, rgba(23, 74, 58, 0.92), rgba(12, 43, 34, 0.94));
  border: 1px solid var(--line);
  clip-path: polygon(
    var(--cut) 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%,
    0 var(--cut)
  );
  overflow: hidden;
}

.cut-panel::after {
  content: "";
  position: absolute;
  inset: -20% -40%;
  pointer-events: none;
  background: linear-gradient(112deg, transparent 44%, rgba(39, 211, 224, 0.18) 50%, transparent 56%);
  transform: translateX(-45%);
  opacity: 0;
  transition: transform 420ms var(--ease), opacity var(--dur) var(--ease);
}

.cut-panel:hover::after,
.cut-panel:focus-within::after {
  opacity: 1;
  transform: translateX(45%);
}

.cut-panel--flat {
  background: linear-gradient(158deg, rgba(12, 43, 34, 0.96), rgba(6, 26, 20, 0.96));
}

/* 8.3 索引行 */
.index-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.index-row {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.4rem 1rem;
  padding: 0.85rem 0.6rem 0.85rem 1.05rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--mist);
  transition:
    background-color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.index-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16%;
  bottom: 16%;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--gold));
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--dur) var(--ease);
}

.index-row:hover,
.index-row:focus-visible {
  background: rgba(23, 74, 58, 0.55);
  transform: translateX(2px);
  color: var(--gold-soft);
}

.index-row:hover::before,
.index-row:focus-visible::before {
  transform: scaleY(1);
}

.index-row__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gold);
}

.index-row__label {
  font-weight: 700;
  letter-spacing: 0.01em;
}

.index-row__meta {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--sage);
  white-space: nowrap;
}

/* 8.4 状态灯与标签 */
.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(39, 211, 224, 0.16), 0 0 12px rgba(39, 211, 224, 0.7);
}

.status-dot--gold {
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(244, 184, 74, 0.16), 0 0 12px rgba(244, 184, 74, 0.7);
}

.status-dot--violet {
  background: var(--violet);
  box-shadow: 0 0 0 3px rgba(138, 99, 255, 0.18), 0 0 12px rgba(138, 99, 255, 0.7);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.16rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sage);
  border: 1px solid var(--line);
  background: rgba(12, 43, 34, 0.65);
}

.tag--gold {
  color: var(--gold-soft);
  border-color: var(--line-gold);
  background: rgba(244, 184, 74, 0.1);
}

.tag--violet {
  color: #C3B2FF;
  border-color: rgba(138, 99, 255, 0.45);
  background: rgba(138, 99, 255, 0.12);
}

/* 8.5 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--sage);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs li + li::before {
  content: "／";
  color: rgba(143, 167, 157, 0.5);
}

.breadcrumbs__link {
  color: var(--sage);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible {
  color: var(--gold-soft);
}

.breadcrumbs [aria-current="page"] {
  color: var(--mist);
}

/* 8.6 图片容器基础规则（页面阶段放图片） */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background:
    linear-gradient(150deg, rgba(23, 74, 58, 0.9), rgba(6, 26, 20, 0.96)),
    repeating-linear-gradient(45deg, rgba(39, 211, 224, 0.06) 0 1px, transparent 1px 12px);
}

.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > svg,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms var(--ease), filter 300ms var(--ease);
}

.media-frame:hover > img,
.media-frame:hover > picture > img,
.media-frame:hover > svg {
  transform: scale(1.03);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(160deg, rgba(39, 211, 224, 0.12), transparent 46%),
    linear-gradient(0deg, rgba(6, 26, 20, 0.55), transparent 42%),
    repeating-linear-gradient(0deg, rgba(6, 26, 20, 0.22) 0 1px, transparent 1px 3px);
  opacity: 0.6;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* =========================================================
   9. 页脚
   ========================================================= */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 6vw, 5.5rem);
  background:
    radial-gradient(60rem 26rem at 88% 0%, rgba(138, 99, 255, 0.12), transparent 62%),
    radial-gradient(52rem 24rem at 6% 10%, rgba(39, 211, 224, 0.09), transparent 60%),
    linear-gradient(180deg, var(--ink-deep), var(--ink) 42%, #0B2620 100%);
  border-top: 1px solid var(--line-gold);
  color: var(--sage);
  font-size: 0.95rem;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), rgba(244, 184, 74, 0.15) 40%, rgba(39, 211, 224, 0.55) 78%, transparent);
  transform: skewX(-24deg) translateX(-6px);
  transform-origin: left;
  pointer-events: none;
}

.footer__top,
.footer__contact,
.footer__legal {
  width: min(var(--shell), calc(100% - var(--gutter)));
  margin-inline: auto;
}

.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  padding-block: clamp(2.25rem, 4vw, 3.25rem) clamp(1.5rem, 3vw, 2.25rem);
}

.footer__brand {
  display: grid;
  align-content: start;
  gap: 0.55rem;
  padding-right: 1rem;
  border-right: 1px solid var(--line-soft);
}

.footer__mark {
  font-family: var(--font-mono);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--gold);
  text-shadow: 0 0 26px rgba(244, 184, 74, 0.4);
}

.footer__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.footer__tagline {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--sage);
}

.footer__stamp {
  margin-top: 0.35rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: rgba(143, 167, 157, 0.8);
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.footer__col-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-soft);
  padding-bottom: 0.55rem;
  margin-bottom: 0.7rem;
  border-bottom: 1px solid var(--line-gold);
}

.footer__list {
  display: grid;
  gap: 0.45rem;
}

.footer__link {
  display: inline-block;
  padding-block: 0.1rem;
  font-size: 0.92rem;
  color: #B9CEC4;
  text-decoration: none;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer__link:hover,
.footer__link:focus-visible {
  color: var(--gold-soft);
  transform: translateX(3px);
}

/* 联络条 */
.footer__contact {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem 1.5rem;
  padding-block: clamp(1.25rem, 2.5vw, 1.75rem);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(23, 74, 58, 0.35), rgba(6, 26, 20, 0));
}

.footer__contact-item {
  display: grid;
  gap: 0.25rem;
  padding-left: 0.85rem;
  border-left: 2px solid rgba(39, 211, 224, 0.4);
}

.footer__contact-key {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer__contact-val {
  font-size: 0.95rem;
  color: var(--mist);
  word-break: break-all;
}

.footer__note {
  grid-column: 1 / -1;
  font-size: 0.8rem;
  line-height: 1.7;
  color: rgba(143, 167, 157, 0.92);
  max-width: 78ch;
}

/* 法律行 */
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.35rem 1.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.footer__copy {
  color: rgba(143, 167, 157, 0.95);
}

.footer__icp {
  font-size: 0.78rem;
  color: rgba(143, 167, 157, 0.95);
}

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.footer__legal-links li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.footer__legal-links li + li::before {
  content: "／";
  color: rgba(143, 167, 157, 0.45);
}

.footer__legal-links a {
  color: #B9CEC4;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.footer__legal-links a:hover,
.footer__legal-links a:focus-visible {
  color: var(--gold-soft);
}

/* =========================================================
   10. 响应式
   ========================================================= */
@media (max-width: 1080px) {
  :root { --gutter: 2.25rem; }

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

  .footer__brand {
    padding-right: 0;
    padding-bottom: 1rem;
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }
}

@media (max-width: 900px) {
  :root { --gutter: 1.75rem; }

  /* 刊头：品牌 + 菜单按钮 + 快入口 */
  .masthead__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand toggle"
      "aside aside";
    gap: 0.55rem 1rem;
    padding-block: 0.95rem 0.85rem;
  }

  .brand { grid-area: brand; justify-self: start; }
  .nav-toggle { grid-area: toggle; display: inline-flex; align-self: center; }
  .masthead__aside--left { display: none; }

  .masthead__aside--right {
    grid-area: aside;
    justify-content: flex-start;
    padding-top: 0.15rem;
  }

  /* 导航折叠为下拉面板 */
  .site-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    background: #081F19;
    border-top: 1px solid var(--line-gold);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
    transition:
      max-height 260ms var(--ease),
      opacity 180ms var(--ease),
      visibility 0s linear 260ms;
  }

  [data-open="true"] .site-nav {
    max-height: 72vh;
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    transition:
      max-height 280ms var(--ease),
      opacity 200ms var(--ease),
      visibility 0s;
  }

  .site-nav__list {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0 0.9rem;
  }

  .site-nav__link {
    justify-content: flex-start;
    padding: 0.9rem 1.35rem 1rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--line-soft);
  }

  .site-nav__link::after {
    left: 1.35rem;
    right: auto;
    width: 2.4rem;
    bottom: 0.62rem;
  }

  .site-nav__link[aria-current="page"] {
    box-shadow: inset 3px 0 0 var(--gold);
    background: linear-gradient(90deg, rgba(244, 184, 74, 0.16), transparent 70%);
  }

  /* 组件降级 */
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

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

@media (max-width: 620px) {
  :root { --gutter: 1.35rem; --cut: 14px; }

  body { font-size: 16px; line-height: 1.72; }

  .header-strip__tags { display: none; }
  .header-strip__inner { justify-content: flex-start; }

  .brand__mark { width: 2.6rem; height: 2.6rem; font-size: 1rem; }
  .brand__name { font-size: 1.18rem; }
  .brand__line { font-size: 0.6rem; letter-spacing: 0.14em; }

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

  .footer__nav { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; }
  .footer__legal { justify-content: flex-start; }
  .index-row { grid-template-columns: auto minmax(0, 1fr); }
  .index-row__meta { grid-column: 2; }
}

@media (max-width: 400px) {
  .brand__line { display: none; }
  .btn { width: 100%; justify-content: center; }
}

/* ---------- 11. 动效降级 ---------- */
@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;
  }

  .btn:hover,
  .btn:focus-visible,
  .index-row:hover,
  .index-row:focus-visible,
  .footer__link:hover,
  .footer__link:focus-visible,
  .chip-link:hover,
  .chip-link:focus-visible,
  .brand:hover .brand__mark,
  .media-frame:hover > img { transform: none; }

  .cut-panel::after { display: none; }
}