/* ==========================================================================
   尊龙凯寸通用 · 版本9官方内容站
   共享样式 /assets/site.css
   语言：展览画册 × 海洋数据流 × 粗野主义硬边
   ========================================================================== */

:root {
  /* 品牌色 */
  --zk-abyss: #062B3F;
  --zk-paper: #F7F3E8;
  --zk-green: #0B4F4A;
  --zk-coral: #FF6A3D;
  --zk-indigo: #2E2A5C;
  --zk-mist: #DCE9EE;
  --zk-gold: #C9A227;
  --zk-wine: #6B2233;
  --zk-salt: #5B6B73;
  --zk-ink: #111C22;

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

  /* 度量 */
  --zk-line: 3px;
  --zk-border: 2px;
  --zk-radius: 2px;
  --zk-shadow: 8px 8px 0 rgba(6, 43, 63, 0.16);
  --zk-shadow-hard: 6px 6px 0 rgba(17, 28, 34, 0.85);
  --zk-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --zk-wrap: 1240px;
  --zk-gutter: clamp(18px, 4vw, 48px);
  --zk-header-h: 112px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--zk-header-h) + 14px);
}

body {
  margin: 0;
  background: var(--zk-paper);
  color: var(--zk-ink);
  font-family: var(--zk-font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--zk-coral);
  color: var(--zk-ink);
}

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

/* ---------- 中文排版基线 ---------- */
h1, h2, h3, h4 {
  font-family: var(--zk-font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(28px, 3.6vw, 44px);
}

h3 {
  font-size: clamp(21px, 2.2vw, 27px);
  line-height: 1.3;
}

p {
  text-wrap: pretty;
}

/* ---------- 布局容器 ---------- */
.zk-container {
  width: 100%;
  max-width: var(--zk-wrap);
  margin-inline: auto;
  padding-inline: var(--zk-gutter);
}

.zk-main {
  display: block;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.zk-section {
  padding-block: clamp(40px, 6vw, 86px);
}

.zk-prose {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.9;
}

.zk-prose p + p {
  margin-top: 1.1em;
}

.zk-lead {
  max-width: 64ch;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.8;
  color: var(--zk-abyss);
}

.zk-mono {
  font-family: var(--zk-font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.zk-muted {
  color: var(--zk-salt);
  font-size: 14px;
}

.zk-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 标题组件 ---------- */
.zk-display {
  font-family: var(--zk-font-display);
  font-weight: 900;
  font-size: clamp(38px, 6.4vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.zk-h2 {
  font-family: var(--zk-font-display);
  font-weight: 800;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.16;
}

.zk-h3 {
  font-family: var(--zk-font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.2vw, 27px);
  line-height: 1.3;
}

.zk-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--zk-green);
}

.zk-eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  background: var(--zk-coral);
}

.zk-rule {
  height: 3px;
  border: 0;
  background: var(--zk-ink);
  margin-block: clamp(28px, 4vw, 52px);
}

.zk-rule--gold {
  background: var(--zk-gold);
}

/* ---------- 按钮 ---------- */
.zk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: var(--zk-border) solid var(--zk-ink);
  border-radius: var(--zk-radius);
  background: var(--zk-paper);
  color: var(--zk-ink);
  font-family: var(--zk-font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.4;
  text-decoration: none;
  box-shadow: var(--zk-shadow-hard);
  cursor: pointer;
  transition: transform 0.18s var(--zk-ease), box-shadow 0.18s var(--zk-ease),
    background 0.18s var(--zk-ease), color 0.18s var(--zk-ease), border-color 0.18s var(--zk-ease);
}

.zk-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(17, 28, 34, 0.85);
}

.zk-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(17, 28, 34, 0.85);
}

.zk-btn--coral {
  background: var(--zk-coral);
  border-color: var(--zk-ink);
  color: var(--zk-ink);
}

.zk-btn--abyss {
  background: var(--zk-abyss);
  border-color: var(--zk-abyss);
  color: var(--zk-paper);
  box-shadow: 6px 6px 0 var(--zk-gold);
}

.zk-btn--abyss:hover {
  box-shadow: 9px 9px 0 var(--zk-gold);
}

.zk-btn--ghost {
  background: transparent;
  border-color: currentColor;
  box-shadow: none;
}

.zk-btn--ghost:hover {
  transform: none;
  box-shadow: none;
  background: rgba(255, 106, 61, 0.14);
}

/* ---------- 标签 ---------- */
.zk-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1.5px solid var(--zk-gold);
  background: rgba(201, 162, 39, 0.14);
  color: var(--zk-abyss);
  font-family: var(--zk-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.5;
  white-space: nowrap;
}

.zk-tag--coral {
  background: var(--zk-coral);
  border-color: var(--zk-coral);
  color: var(--zk-ink);
}

.zk-tag--wine {
  background: var(--zk-wine);
  border-color: var(--zk-wine);
  color: var(--zk-paper);
}

.zk-tag--mist {
  background: var(--zk-mist);
  border-color: transparent;
  color: var(--zk-abyss);
}

/* ---------- 卡片 ---------- */
.zk-card {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  border: var(--zk-border) solid var(--zk-ink);
  background: var(--zk-paper);
  box-shadow: var(--zk-shadow);
  transition: box-shadow 0.2s var(--zk-ease), border-color 0.2s var(--zk-ease),
    transform 0.2s var(--zk-ease);
}

.zk-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--zk-coral);
  box-shadow: 12px 12px 0 rgba(255, 106, 61, 0.28);
}

.zk-card--mist {
  background: var(--zk-mist);
}

.zk-card--abyss {
  background: var(--zk-abyss);
  border-color: var(--zk-abyss);
  color: var(--zk-paper);
  box-shadow: 8px 8px 0 var(--zk-gold);
}

.zk-card--wine {
  background: var(--zk-wine);
  border-color: var(--zk-wine);
  color: var(--zk-paper);
}

/* ---------- 面包屑 ---------- */
.zk-breadcrumb {
  padding-block: 14px;
  border-bottom: 1px solid rgba(17, 28, 34, 0.14);
}

.zk-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--zk-salt);
}

.zk-breadcrumb__link {
  color: var(--zk-abyss);
  text-decoration: none;
  border-bottom: 1px solid var(--zk-gold);
  transition: color 0.18s var(--zk-ease), border-color 0.18s var(--zk-ease);
}

.zk-breadcrumb__link:hover {
  color: var(--zk-wine);
  border-bottom-color: var(--zk-coral);
}

.zk-breadcrumb__sep {
  color: var(--zk-gold);
}

.zk-breadcrumb__current {
  color: var(--zk-ink);
  font-weight: 600;
}

/* ---------- 网格 ---------- */
.zk-grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}

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

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

.zk-grid--12 {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

/* ---------- 粘性旁注索引 ---------- */
.zk-index {
  position: sticky;
  top: calc(var(--zk-header-h) + 14px);
  align-self: start;
  padding-left: 16px;
  border-left: var(--zk-line) solid var(--zk-gold);
}

.zk-index__title {
  margin-bottom: 10px;
  font-family: var(--zk-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--zk-salt);
}

.zk-index__list {
  display: grid;
  gap: 2px;
}

.zk-index__link {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--zk-abyss);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--zk-ease), border-color 0.18s var(--zk-ease);
}

.zk-index__link:hover {
  color: var(--zk-wine);
  border-bottom-color: var(--zk-gold);
}

.zk-index__link[aria-current="true"] {
  color: var(--zk-ink);
  font-weight: 700;
  border-bottom-color: var(--zk-coral);
}

/* ---------- 主题筛选 ---------- */
.zk-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.zk-filter__btn {
  padding: 8px 16px;
  border: var(--zk-border) solid var(--zk-ink);
  border-radius: var(--zk-radius);
  background: var(--zk-paper);
  color: var(--zk-abyss);
  font-family: var(--zk-font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.5;
  cursor: pointer;
  transition: background 0.16s var(--zk-ease), color 0.16s var(--zk-ease),
    box-shadow 0.16s var(--zk-ease), transform 0.16s var(--zk-ease);
}

.zk-filter__btn:hover {
  background: var(--zk-mist);
}

.zk-filter__btn[aria-pressed="true"] {
  background: var(--zk-coral);
  color: var(--zk-ink);
  box-shadow: 4px 4px 0 rgba(17, 28, 34, 0.85);
}

.zk-filter__btn:active {
  transform: translate(1px, 1px);
}

.zk-filter__count {
  margin-left: 4px;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--zk-salt);
}

/* ---------- 图片容器基础 ---------- */
.zk-figure {
  margin: 0;
  border: var(--zk-border) solid var(--zk-ink);
  background: var(--zk-paper);
  box-shadow: var(--zk-shadow);
  overflow: hidden;
}

.zk-figure__frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, var(--zk-abyss) 0%, var(--zk-green) 58%, var(--zk-coral) 100%);
}

.zk-figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(247, 243, 232, 0.14) 0 2px,
    transparent 2px 16px
  );
  pointer-events: none;
}

.zk-figure__img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.zk-figure__caption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-top: var(--zk-border) solid var(--zk-ink);
  background: var(--zk-paper);
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--zk-abyss);
}

.zk-figure--wide .zk-figure__frame {
  aspect-ratio: 21 / 9;
}

.zk-figure--tall .zk-figure__frame {
  aspect-ratio: 4 / 5;
}

/* ---------- 跳过链接 ---------- */
.zk-skip {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 999;
  padding: 12px 20px;
  border: var(--zk-border) solid var(--zk-ink);
  background: var(--zk-coral);
  color: var(--zk-ink);
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--zk-shadow-hard);
  transition: top 0.18s var(--zk-ease);
}

.zk-skip:focus {
  top: 16px;
}

/* ==========================================================================
   报头
   ========================================================================== */
.zk-header {
  position: sticky;
  top: 0;
  z-index: 90;
  isolation: isolate;
  background: var(--zk-paper);
  border-bottom: var(--zk-line) solid var(--zk-ink);
}

/* 上层：品牌说明层 */
.zk-header__top {
  background-color: var(--zk-abyss);
  background-image: repeating-linear-gradient(
    115deg,
    rgba(220, 233, 238, 0.07) 0 2px,
    transparent 2px 14px
  );
  color: var(--zk-paper);
}

.zk-header__top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 2vw, 28px);
  padding-block: 14px;
  transition: padding-block 0.22s var(--zk-ease);
}

.zk-header[data-scrolled] .zk-header__top-inner {
  padding-block: 8px;
}

/* 品牌锁 */
.zk-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.zk-brand__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--zk-gold);
  background: rgba(201, 162, 39, 0.12);
  color: var(--zk-gold);
  font-family: var(--zk-font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: transform 0.22s var(--zk-ease), background 0.22s var(--zk-ease);
}

.zk-brand:hover .zk-brand__mark {
  transform: rotate(-6deg);
  background: rgba(201, 162, 39, 0.26);
}

.zk-brand__text {
  display: block;
  min-width: 0;
}

.zk-brand__name {
  display: block;
  font-family: var(--zk-font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--zk-paper);
}

.zk-brand__sub {
  display: block;
  margin-top: 3px;
  font-family: var(--zk-font-mono);
  font-size: 11px;
  line-height: 1.3;
  letter-spacing: 0.1em;
  color: var(--zk-mist);
  opacity: 0.78;
}

/* 快捷入口 */
.zk-utility {
  display: flex;
  align-items: center;
}

.zk-utility__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}

.zk-utility__item {
  display: block;
}

.zk-utility__link {
  display: inline-block;
  padding: 9px 13px;
  border: 1px solid rgba(220, 233, 238, 0.28);
  color: var(--zk-mist);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.07em;
  line-height: 1.4;
  text-decoration: none;
  transition: color 0.18s var(--zk-ease), border-color 0.18s var(--zk-ease),
    background 0.18s var(--zk-ease);
}

.zk-utility__link:hover {
  color: var(--zk-paper);
  border-color: var(--zk-mist);
  background: rgba(220, 233, 238, 0.1);
}

.zk-utility__link--cta {
  background: var(--zk-coral);
  border-color: var(--zk-coral);
  color: var(--zk-ink);
  font-weight: 700;
}

.zk-utility__link--cta:hover {
  background: var(--zk-gold);
  border-color: var(--zk-gold);
  color: var(--zk-ink);
}

/* 移动目录按钮 */
.zk-navtoggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 2px solid var(--zk-gold);
  background: rgba(247, 243, 232, 0.06);
  color: var(--zk-paper);
  font-family: var(--zk-font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: background 0.18s var(--zk-ease), border-color 0.18s var(--zk-ease);
}

.zk-navtoggle:hover {
  background: rgba(201, 162, 39, 0.2);
  border-color: var(--zk-coral);
}

.zk-navtoggle__label {
  white-space: nowrap;
}

.zk-navtoggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background 0.18s var(--zk-ease);
}

.zk-navtoggle__bars::before,
.zk-navtoggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s var(--zk-ease);
}

.zk-navtoggle__bars::before {
  top: -5px;
}

.zk-navtoggle__bars::after {
  top: 5px;
}

.zk-header[data-open] .zk-navtoggle__bars {
  background: transparent;
}

.zk-header[data-open] .zk-navtoggle__bars::before {
  transform: translateY(5px) rotate(45deg);
}

.zk-header[data-open] .zk-navtoggle__bars::after {
  transform: translateY(-5px) rotate(-45deg);
}

/* 下层：栏目导航层 */
.zk-header__main {
  position: relative;
  background: var(--zk-paper);
}

.zk-header__main-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-block: 2px;
}

.zk-nav {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.5vw, 20px);
  width: 100%;
}

.zk-nav__eyebrow {
  display: none;
  font-family: var(--zk-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--zk-salt);
}

.zk-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
}

.zk-nav__item {
  display: block;
}

.zk-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 14px 10px;
  border-bottom: var(--zk-line) solid transparent;
  color: var(--zk-abyss);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.4;
  text-decoration: none;
  transition: color 0.18s var(--zk-ease), border-color 0.18s var(--zk-ease),
    background 0.18s var(--zk-ease);
}

.zk-nav__link:hover {
  color: var(--zk-ink);
  border-bottom-color: var(--zk-gold);
  background: var(--zk-mist);
}

.zk-nav__link[aria-current="page"] {
  color: var(--zk-abyss);
  font-weight: 700;
  border-bottom-color: var(--zk-coral);
}

.zk-nav__index {
  font-family: var(--zk-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--zk-salt);
  transition: color 0.18s var(--zk-ease);
}

.zk-nav__link:hover .zk-nav__index {
  color: var(--zk-wine);
}

.zk-nav__link[aria-current="page"] .zk-nav__index {
  color: var(--zk-coral);
}

/* 抽屉第二段：快捷入口（仅移动端显示） */
.zk-nav__extra {
  display: none;
}

.zk-nav__extra-title {
  font-family: var(--zk-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--zk-salt);
}

.zk-nav__extra-list {
  display: grid;
  gap: 2px;
  margin-top: 8px;
}

.zk-nav__extra-link {
  display: block;
  padding: 12px 4px;
  border-bottom: 1px solid rgba(17, 28, 34, 0.12);
  color: var(--zk-abyss);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.18s var(--zk-ease), color 0.18s var(--zk-ease);
}

.zk-nav__extra-link:hover {
  background: var(--zk-mist);
  color: var(--zk-wine);
}

/* 阅读进度线 */
.zk-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(var(--zk-line) * -1);
  height: 3px;
  background: var(--zk-coral);
  transform: scaleX(var(--zk-progress, 0));
  transform-origin: 0 50%;
  transition: transform 0.12s linear;
  pointer-events: none;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.zk-footer {
  position: relative;
  overflow: hidden;
  background: var(--zk-indigo);
  color: var(--zk-paper);
  border-top: var(--zk-line) solid var(--zk-ink);
}

.zk-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(247, 243, 232, 0.05) 0 2px,
    transparent 2px 18px
  );
  pointer-events: none;
}

.zk-footer__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(38px, 5.5vw, 68px) 26px;
}

.zk-footer__masthead {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.95fr);
  gap: clamp(26px, 4vw, 64px);
}

.zk-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  max-width: 34ch;
}

.zk-footer__mark {
  font-family: var(--zk-font-mono);
  font-size: clamp(34px, 4.4vw, 52px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--zk-gold);
}

.zk-footer__name {
  font-family: var(--zk-font-display);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--zk-paper);
}

.zk-footer__note {
  font-size: 15px;
  line-height: 1.8;
  color: var(--zk-mist);
  opacity: 0.88;
}

.zk-footer__cta {
  margin-top: 6px;
}

.zk-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 40px);
}

.zk-footer__group {
  min-width: 0;
}

.zk-footer__title {
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(201, 162, 39, 0.45);
  font-family: var(--zk-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--zk-gold);
}

.zk-footer__links {
  display: grid;
  gap: 2px;
}

.zk-footer__item {
  display: block;
}

.zk-footer__link {
  display: inline-block;
  padding-block: 4px;
  border-bottom: 1px solid transparent;
  color: var(--zk-mist);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  transition: color 0.18s var(--zk-ease), border-color 0.18s var(--zk-ease);
}

.zk-footer__link:hover {
  color: var(--zk-paper);
  border-bottom-color: var(--zk-coral);
}

.zk-footer__contact {
  display: grid;
  gap: 6px;
  margin-top: clamp(24px, 3.4vw, 40px);
  padding-top: 18px;
  border-top: 1px solid rgba(220, 233, 238, 0.2);
}

.zk-footer__contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  color: var(--zk-mist);
}

.zk-footer__label {
  min-width: 44px;
  font-family: var(--zk-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--zk-gold);
}

.zk-footer__value {
  font-family: var(--zk-font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--zk-paper);
  word-break: break-all;
}

.zk-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 22px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(220, 233, 238, 0.2);
}

.zk-footer__legal-line {
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--zk-mist);
  opacity: 0.85;
}

.zk-footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1100px) {
  .zk-nav__link {
    padding: 12px 10px 10px;
    font-size: 14px;
  }
}

@media (max-width: 960px) {
  .zk-utility {
    display: none;
  }

  .zk-navtoggle {
    display: inline-flex;
  }

  .zk-header__main {
    display: none;
  }

  .zk-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 6;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    padding: 16px var(--zk-gutter) 26px;
    background: var(--zk-paper);
    border-top: var(--zk-line) solid var(--zk-ink);
    border-bottom: var(--zk-line) solid var(--zk-ink);
    box-shadow: 0 18px 0 rgba(6, 43, 63, 0.14);
    max-height: calc(100vh - var(--zk-header-h));
    max-height: calc(100dvh - var(--zk-header-h));
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .zk-header[data-open] .zk-nav {
    display: flex;
  }

  .zk-nav__eyebrow {
    display: block;
  }

  .zk-nav__list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0;
  }

  .zk-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 14px 8px;
    border-bottom: 1px solid rgba(17, 28, 34, 0.12);
    border-left: var(--zk-line) solid transparent;
    border-bottom-width: 1px;
    font-size: 15px;
  }

  .zk-nav__link:hover {
    background: var(--zk-mist);
    border-bottom-color: rgba(17, 28, 34, 0.12);
    border-left-color: var(--zk-gold);
  }

  .zk-nav__link[aria-current="page"] {
    background: var(--zk-mist);
    border-bottom-color: rgba(17, 28, 34, 0.12);
    border-left-color: var(--zk-coral);
  }

  .zk-nav__extra {
    display: block;
    padding-top: 14px;
    border-top: var(--zk-border) solid var(--zk-ink);
  }

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

  .zk-grid--12 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .zk-index {
    position: static;
    border-left: 0;
    padding-left: 0;
  }

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

  .zk-footer__brand {
    max-width: none;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .zk-brand__mark {
    width: 38px;
    height: 38px;
    font-size: 12px;
  }

  .zk-brand__name {
    font-size: 17px;
  }

  .zk-brand__sub {
    display: none;
  }

  .zk-grid--2,
  .zk-grid--3,
  .zk-grid--12 {
    grid-template-columns: minmax(0, 1fr);
  }

  .zk-btn {
    width: 100%;
    padding: 13px 18px;
  }

  .zk-footer__cta {
    width: auto;
  }

  .zk-footer__nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .zk-footer__legal {
    flex-direction: column;
    align-items: flex-start;
  }

  .zk-figure__caption {
    flex-direction: column;
    gap: 4px;
  }
}

/* ---------- 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;
  }

  .zk-progress {
    transition: none;
  }

  .zk-btn:hover,
  .zk-card:hover {
    transform: none;
  }
}