/* ==========================================================================
   zoty Site Kit —— 共享样式
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--zt-font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--zt-text);
  background-color: var(--zt-bg-deep);
  min-height: 100vh;
  overflow-x: clip;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

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

:focus-visible {
  outline: 3px solid var(--zt-acid);
  outline-offset: 3px;
}

:root {
  --zt-bg-deep: #0A1428;
  --zt-bg-card: #111E3A;
  --zt-jewel-teal: #0B3B3C;
  --zt-jewel-wine: #5E0E2D;
  --zt-jewel-indigo: #2A1E5C;
  --zt-acid: #C6FF00;
  --zt-orange: #FF6B00;
  --zt-text: #F2F6F8;
  --zt-muted: #A8B4C4;
  --zt-border: rgba(242, 246, 248, 0.16);
  --zt-border-strong: rgba(242, 246, 248, 0.28);
  --zt-shadow: 8px 8px 0 rgba(0, 0, 0, 0.4);
  --zt-shadow-acid: 6px 6px 0 rgba(198, 255, 0, 0.25);
  --zt-glow-acid: 0 0 8px rgba(198, 255, 0, 0.8);
  --zt-header-h: 76px;
  --zt-font-head: "Noto Sans SC", system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  --zt-font-body: "Noto Sans SC", system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  --zt-font-data: "JetBrains Mono", "IBM Plex Mono", ui-monospace, "SF Mono", monospace;
  --zt-fs-display: clamp(48px, 7vw, 96px);
  --zt-fs-h1: clamp(36px, 5vw, 72px);
  --zt-fs-h2: clamp(26px, 3.5vw, 48px);
  --zt-fs-h3: clamp(20px, 2vw, 28px);
  --zt-fs-body: 16px;
  --zt-fs-data: clamp(24px, 3vw, 48px);
  --zt-radius: 0;
  --zt-border-w: 2px;
}

/* ---------------- 基础排版 ---------------- */

h1,
h2,
h3,
h4 {
  font-family: var(--zt-font-head);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.01em;
}

h1 {
  font-size: var(--zt-fs-h1);
}

h2 {
  font-size: var(--zt-fs-h2);
}

h3 {
  font-size: var(--zt-fs-h3);
}

p {
  max-width: 62ch;
}

/* ---------------- 容器 ---------------- */

.zt-container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.zt-main {
  min-height: 70vh;
  padding-top: var(--zt-header-h);
}

.zt-main--flush {
  padding-top: 0;
}

.zt-stack {
  display: grid;
  gap: 16px;
}

.zt-stack--lg {
  gap: 32px;
}

.zt-prose {
  max-width: 72ch;
  display: grid;
  gap: 1.2em;
}

.zt-prose h2,
.zt-prose h3 {
  margin-top: 0.8em;
}

.zt-prose p {
  max-width: 62ch;
}

/* ---------------- 跳过链接 ---------------- */

.zt-skip {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  background: var(--zt-acid);
  color: var(--zt-bg-deep);
  font-weight: 800;
  font-size: 14px;
  padding: 12px 20px;
  transform: translateY(-180%);
  transition: transform 0.3s ease;
}

.zt-skip:focus {
  transform: translateY(0);
  outline: 4px solid var(--zt-orange);
}

/* ---------------- 头部导航 ---------------- */

.zt-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--zt-header-h);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 2px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.zt-header.is-solid {
  background: rgba(10, 20, 40, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: rgba(198, 255, 0, 0.35);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.zt-header[data-open] {
  background: rgba(10, 20, 40, 0.98);
  border-bottom-color: rgba(198, 255, 0, 0.35);
}

.zt-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(198, 255, 0, 0.7) 50%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.zt-header.is-solid::after,
.zt-header[data-open]::after {
  opacity: 1;
}

.zt-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}

.zt-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.zt-brand__glyph {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--zt-acid);
  color: var(--zt-bg-deep);
  font-family: var(--zt-font-data);
  font-weight: 900;
  font-size: 24px;
  border: 2px solid var(--zt-acid);
  transition: background 0.2s, color 0.2s, transform 0.2s;
}

.zt-brand:hover .zt-brand__glyph {
  background: var(--zt-bg-deep);
  color: var(--zt-acid);
  transform: rotate(-4deg);
}

.zt-brand__copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.zt-brand__name {
  font-weight: 900;
  font-size: 17px;
  color: var(--zt-text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.zt-brand__sub {
  font-family: var(--zt-font-data);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--zt-acid);
  text-transform: uppercase;
  white-space: nowrap;
}

.zt-nav-toggle {
  display: none;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 12px;
  border: 2px solid var(--zt-border-strong);
  background: rgba(10, 20, 40, 0.8);
  transition: border-color 0.3s;
}

.zt-nav-toggle:hover {
  border-color: var(--zt-acid);
}

.zt-nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.zt-nav-toggle__bar {
  width: 24px;
  height: 3px;
  background: var(--zt-text);
  transition: transform 0.35s ease, background 0.35s ease, opacity 0.2s ease;
}

.zt-nav-toggle[aria-expanded="true"] .zt-nav-toggle__bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
  background: var(--zt-acid);
}

.zt-nav-toggle[aria-expanded="true"] .zt-nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.zt-nav-toggle[aria-expanded="true"] .zt-nav-toggle__bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
  background: var(--zt-acid);
}

.zt-nav-toggle__label {
  font-size: 13px;
  font-weight: 700;
  color: var(--zt-text);
}

.zt-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.zt-nav__ordinal {
  font-size: 11px;
  font-family: var(--zt-font-data);
  letter-spacing: 0.2em;
  color: var(--zt-muted);
  border-left: 3px solid var(--zt-acid);
  padding-left: 10px;
  white-space: nowrap;
}

.zt-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.zt-nav__item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.zt-nav__item::before {
  content: attr(data-index);
  font-family: var(--zt-font-data);
  font-size: 10px;
  font-weight: 700;
  color: var(--zt-acid);
  opacity: 0.75;
  transform: translateY(1px);
}

.zt-nav__link {
  display: inline-block;
  position: relative;
  padding: 8px 12px;
  font-weight: 700;
  font-size: 15px;
  color: rgba(242, 246, 248, 0.88);
  white-space: nowrap;
  transition: color 0.2s;
}

.zt-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 3px;
  background: var(--zt-acid);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.zt-nav__link:hover {
  color: #fff;
}

.zt-nav__link:hover::after,
.zt-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.zt-nav__link[aria-current="page"] {
  color: var(--zt-acid);
}

.zt-nav__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--zt-font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--zt-acid);
  border: 2px solid rgba(198, 255, 0, 0.5);
  padding: 6px 12px;
  background: rgba(198, 255, 0, 0.08);
  white-space: nowrap;
}

.zt-nav__badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--zt-acid);
  box-shadow: var(--zt-glow-acid);
  animation: zt-pulse 2s ease-in-out infinite;
}

/* ---------------- 页脚 ---------------- */

.zt-footer {
  position: relative;
  background: var(--zt-jewel-wine);
  border-top: 4px solid var(--zt-acid);
  margin-top: 120px;
}

.zt-footer::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--zt-acid) 0%, var(--zt-jewel-teal) 50%, var(--zt-orange) 100%);
}

.zt-footer__primary {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1fr 1.6fr;
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 48px;
}

.zt-footer__glyph {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--zt-orange);
  color: var(--zt-bg-deep);
  font-family: var(--zt-font-data);
  font-weight: 900;
  font-size: 22px;
  margin-bottom: 16px;
}

.zt-footer__slogan {
  display: block;
  font-size: 26px;
  font-weight: 900;
  line-height: 1.2;
  color: var(--zt-text);
}

.zt-footer__tagline {
  margin-top: 8px;
  font-size: 14px;
  color: var(--zt-muted);
}

.zt-footer__trust {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 246, 248, 0.65);
  border-left: 4px solid var(--zt-orange);
  padding-left: 12px;
  max-width: 34ch;
}

.zt-footer__label {
  display: block;
  font-family: var(--zt-font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--zt-orange);
  margin-bottom: 16px;
}

.zt-footer__nav ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.zt-footer__nav a {
  font-size: 15px;
  color: rgba(242, 246, 248, 0.85);
  display: inline-block;
  position: relative;
  transition: color 0.2s, padding-left 0.2s;
}

.zt-footer__nav a:hover {
  color: var(--zt-acid);
  padding-left: 6px;
}

.zt-footer__subnav .zt-footer__label {
  color: var(--zt-acid);
}

.zt-footer__contact ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: rgba(242, 246, 248, 0.8);
}

.zt-footer__bottom {
  border-top: 2px solid rgba(242, 246, 248, 0.12);
  padding: 18px 0;
  background: rgba(10, 20, 40, 0.5);
}

.zt-footer__bottom .zt-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-size: 13px;
  color: var(--zt-muted);
  font-family: var(--zt-font-data);
}

.zt-footer__dot {
  color: var(--zt-acid);
  opacity: 0.6;
}

/* ---------------- 章节与标题体系 ---------------- */

.zt-section {
  position: relative;
  padding-block: clamp(56px, 8vw, 112px);
  border-bottom: 2px solid rgba(242, 246, 248, 0.08);
}

.zt-section:last-child {
  border-bottom: 0;
}

.zt-bg-jewel-teal {
  background: var(--zt-jewel-teal);
  border-top: 4px solid var(--zt-acid);
  border-bottom: 4px solid var(--zt-acid);
}

.zt-bg-jewel-wine {
  background: var(--zt-jewel-wine);
  border-top: 4px solid var(--zt-orange);
  border-bottom: 4px solid var(--zt-orange);
}

.zt-bg-jewel-indigo {
  background: var(--zt-jewel-indigo);
  border-top: 4px solid var(--zt-acid);
  border-bottom: 4px solid transparent;
}

.zt-section__head {
  display: flex;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 48px;
  border-bottom: 2px solid var(--zt-border);
  padding-bottom: 16px;
}

.zt-index {
  font-family: var(--zt-font-data);
  font-size: clamp(64px, 8vw, 120px);
  font-weight: 700;
  line-height: 0.9;
  color: var(--zt-acid);
  opacity: 0.22;
  -webkit-text-stroke: 2px rgba(198, 255, 0, 0.9);
  -webkit-text-fill-color: transparent;
  min-width: 0.8em;
}

.zt-index--solid {
  color: var(--zt-acid);
  opacity: 1;
  -webkit-text-fill-color: currentColor;
  -webkit-text-stroke: 0;
}

.zt-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--zt-font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--zt-orange);
  margin-bottom: 12px;
}

.zt-kicker::before {
  content: "";
  width: 32px;
  height: 4px;
  background: var(--zt-orange);
  display: inline-block;
}

.zt-divider {
  height: 4px;
  border: 0;
  background: linear-gradient(90deg, var(--zt-acid), var(--zt-orange), transparent);
  margin: 48px 0;
}

/* ---------------- 面包屑 ---------------- */

.zt-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--zt-muted);
  padding: 24px 0 0;
}

.zt-breadcrumb a {
  color: var(--zt-muted);
  transition: color 0.2s;
}

.zt-breadcrumb a:hover {
  color: var(--zt-acid);
}

.zt-breadcrumb [aria-current="page"] {
  color: var(--zt-text);
}

/* ---------------- 分屏首屏 ---------------- */

.zt-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
  min-height: 100vh;
  padding-block: var(--zt-header-h);
}

.zt-split__panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.zt-split__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border: 3px solid var(--zt-border-strong);
  background:
    linear-gradient(135deg, rgba(198, 255, 0, 0.06) 25%, transparent 25%),
    linear-gradient(225deg, rgba(198, 255, 0, 0.06) 25%, transparent 25%),
    var(--zt-bg-card);
  background-size: 40px 40px;
  box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.4);
}

/* ---------------- 网格 ---------------- */

.zt-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.zt-grid--offset > *:nth-child(even) {
  margin-top: 32px;
}

/* ---------------- 卡片 ---------------- */

.zt-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--zt-bg-card);
  border: var(--zt-border-w) solid var(--zt-border-strong);
  box-shadow: var(--zt-shadow);
  padding: 28px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.zt-card:hover,
.zt-card:focus-within {
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.5);
  border-color: rgba(198, 255, 0, 0.45);
}

.zt-card--data {
  background: var(--zt-bg-card);
  border-color: rgba(198, 255, 0, 0.28);
}

.zt-card--data::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--zt-acid) 0%, var(--zt-acid) 60%, transparent 100%);
}

.zt-card--jewel {
  background: var(--zt-jewel-teal);
}

.zt-card--jewel-wine {
  background: var(--zt-jewel-wine);
}

.zt-card__title {
  font-size: 22px;
  font-weight: 900;
  line-height: 1.3;
}

.zt-card__meta {
  font-family: var(--zt-font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--zt-muted);
  text-transform: uppercase;
}

/* ---------------- 面板 ---------------- */

.zt-panel {
  position: relative;
  background: var(--zt-bg-card);
  border: var(--zt-border-w) solid var(--zt-border);
  box-shadow: var(--zt-shadow);
  padding: clamp(24px, 4vw, 56px);
}

.zt-panel--jewel {
  background: var(--zt-jewel-indigo);
  border-color: rgba(198, 255, 0, 0.3);
}

/* ---------------- 按钮 ---------------- */

.zt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 800;
  font-size: 15px;
  line-height: 1;
  padding: 14px 28px;
  border: 3px solid var(--zt-acid);
  background: transparent;
  color: var(--zt-acid);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s, border-color 0.2s;
}

.zt-btn:hover {
  background: var(--zt-acid);
  color: var(--zt-bg-deep);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(198, 255, 0, 0.25);
}

.zt-btn--primary {
  background: var(--zt-acid);
  color: var(--zt-bg-deep);
  box-shadow: 6px 6px 0 rgba(198, 255, 0, 0.3);
}

.zt-btn--primary:hover {
  background: var(--zt-text);
  border-color: var(--zt-text);
  box-shadow: 6px 6px 0 rgba(242, 246, 248, 0.25);
  color: var(--zt-bg-deep);
}

.zt-btn--ghost {
  border-color: var(--zt-border-strong);
  color: var(--zt-text);
}

.zt-btn--ghost:hover {
  background: var(--zt-border-strong);
  border-color: var(--zt-text);
  color: var(--zt-text);
  box-shadow: 6px 6px 0 rgba(242, 246, 248, 0.2);
}

.zt-btn--orange {
  background: var(--zt-orange);
  border-color: var(--zt-orange);
  color: var(--zt-bg-deep);
  box-shadow: 6px 6px 0 rgba(255, 107, 0, 0.35);
}

.zt-btn--orange:hover {
  background: var(--zt-text);
  border-color: var(--zt-text);
  box-shadow: 6px 6px 0 rgba(242, 246, 248, 0.3);
  color: var(--zt-bg-deep);
}

/* ---------------- 标签 ---------------- */

.zt-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  padding: 6px 14px;
  border: 2px solid var(--zt-border-strong);
  color: var(--zt-text);
  background: transparent;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.zt-chip:hover {
  border-color: var(--zt-acid);
  color: var(--zt-acid);
}

.zt-chip--active {
  background: var(--zt-acid);
  border-color: var(--zt-acid);
  color: var(--zt-bg-deep);
}

.zt-chip--warn {
  border-color: rgba(255, 107, 0, 0.6);
  color: var(--zt-orange);
}

/* ---------------- 数据统计 ---------------- */

.zt-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.zt-stat__num {
  font-family: var(--zt-font-data);
  font-size: var(--zt-fs-data);
  font-weight: 700;
  color: var(--zt-acid);
  line-height: 1;
}

.zt-stat__num--orange {
  color: var(--zt-orange);
}

.zt-stat__label {
  font-size: 13px;
  color: var(--zt-muted);
  letter-spacing: 0.06em;
}

/* ---------------- 图片占位框架 ---------------- */

.zt-img-frame {
  position: relative;
  overflow: hidden;
  border: var(--zt-border-w) solid var(--zt-border-strong);
  background: var(--zt-bg-card);
}

.zt-img-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.zt-img-frame::after {
  content: "IMG";
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--zt-font-data);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: rgba(242, 246, 248, 0.35);
  border: 2px dashed rgba(198, 255, 0, 0.15);
  margin: 16px;
  background-image:
    linear-gradient(rgba(198, 255, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 255, 0, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.zt-img-frame--tall::before {
  padding-top: 75%;
}

.zt-img-frame--wide::before {
  padding-top: 42%;
}

.zt-img-frame img {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------------- 目录索引 ---------------- */

.zt-catalog {
  border: 3px solid var(--zt-border-strong);
  background: rgba(17, 30, 58, 0.7);
  box-shadow: var(--zt-shadow);
}

.zt-catalog__list {
  display: grid;
  grid-template-columns: 1fr;
}

.zt-catalog__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  border-bottom: 2px solid rgba(242, 246, 248, 0.1);
  transition: background 0.2s;
}

.zt-catalog__item:last-child {
  border-bottom: 0;
}

.zt-catalog__item:hover {
  background: rgba(198, 255, 0, 0.05);
}

.zt-catalog__index {
  font-family: var(--zt-font-data);
  font-weight: 700;
  font-size: 18px;
  color: var(--zt-acid);
}

.zt-catalog__arrow {
  font-family: var(--zt-font-data);
  color: var(--zt-muted);
  font-size: 14px;
}

/* ---------------- 数据信使条 ---------------- */

.zt-band {
  overflow: hidden;
  border-block: 2px solid rgba(198, 255, 0, 0.3);
  padding: 12px 0;
  background: rgba(198, 255, 0, 0.06);
  white-space: nowrap;
}

.zt-band__track {
  display: flex;
  width: max-content;
  font-family: var(--zt-font-data);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--zt-text);
  animation: zt-marquee 30s linear infinite;
}

.zt-band__track span {
  display: inline-block;
  padding-right: 3em;
}

/* ---------------- 滚动显现 ---------------- */

.zt-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease, visibility 0.6s ease;
}

.zt-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------------- 动画 ---------------- */

@keyframes zt-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.85);
  }
}

@keyframes zt-marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 1280px) {
  .zt-nav__badge {
    display: none;
  }

  .zt-nav__ordinal {
    display: none;
  }
}

@media (max-width: 1023px) {
  .zt-nav-toggle {
    display: inline-flex;
  }

  .zt-nav {
    position: fixed;
    top: var(--zt-header-h);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 210;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 32px 24px 48px;
    background: linear-gradient(160deg, var(--zt-bg-card), var(--zt-bg-deep));
    border-top: 2px solid rgba(198, 255, 0, 0.2);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-16px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0s linear 0.3s;
  }

  .zt-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .zt-nav__ordinal {
    display: block;
    margin-bottom: 8px;
  }

  .zt-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .zt-nav__item {
    border-bottom: 2px solid rgba(242, 246, 248, 0.08);
  }

  .zt-nav__item::before {
    display: none;
  }

  .zt-nav__link {
    display: block;
    font-size: 22px;
    font-weight: 800;
    padding: 16px 8px;
  }

  .zt-nav__link::after {
    display: none;
  }

  .zt-nav__link[aria-current="page"] {
    background: rgba(198, 255, 0, 0.06);
  }

  .zt-nav__badge {
    display: inline-flex;
    margin-top: auto;
    align-self: flex-start;
  }

  .zt-split {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: var(--zt-header-h);
  }

  .zt-split__visual {
    min-height: 320px;
  }

  .zt-grid--offset > *:nth-child(even) {
    margin-top: 0;
  }

  .zt-footer__primary {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding-top: 48px;
  }
}

@media (max-width: 640px) {
  :root {
    --zt-header-h: 64px;
  }

  .zt-header {
    height: var(--zt-header-h);
  }

  .zt-brand__name {
    font-size: 15px;
  }

  .zt-brand__sub {
    font-size: 9px;
    letter-spacing: 0.1em;
  }

  .zt-brand__glyph {
    width: 36px;
    height: 36px;
    font-size: 20px;
  }

  .zt-section__head {
    flex-direction: column;
    align-items: flex-start;
  }

  .zt-btn {
    width: 100%;
  }

  .zt-catalog__item {
    grid-template-columns: auto 1fr;
  }

  .zt-catalog__arrow {
    display: none;
  }

  .zt-grid {
    grid-template-columns: 1fr;
  }

  .zt-footer__primary {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .zt-footer__bottom .zt-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* ---------------- 无障碍与动效偏好 ---------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  .zt-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .zt-band__track {
    animation: none;
  }
}