/* ============================================================
   NG赛场 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 基础组件
   ============================================================ */

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

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

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

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

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

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

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

table { border-collapse: collapse; width: 100%; }

/* ---------- 设计变量 ---------- */
:root {
  /* 色彩 */
  --pitch-900: #08261C;   /* 夜场深绿 */
  --pitch-800: #0B3D2E;   /* 草皮墨绿 */
  --pitch-750: #0C3327;   /* 刻度带底 */
  --pitch-600: #1F5C46;   /* 中墨绿 */
  --red: #E63946;
  --red-deep: #C92C39;
  --yellow: #FFC300;
  --teal: #2BE8B0;
  --teal-ink: #0E8A69;    /* 浅底上的青绿可读版 */
  --violet: #7C5CFF;
  --paper: #F4F6F3;
  --ink: #14181A;
  --moss: #A8B3AD;
  --moss-ink: #5E7A6E;    /* 浅底次级文字 */
  --line: #C9D6CF;
  --white: #FFFFFF;

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

  /* 尺度 */
  --wrap: 1320px;
  --gutter: 24px;
  --header-h: 56px;
  --header-strip: 10px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --radius-organic: 18px 4px 18px 4px;
}

/* ---------- 中文基础排版 ---------- */
body {
  padding-top: calc(var(--header-h) + var(--header-strip));
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

[id] { scroll-margin-top: calc(var(--header-h) + 16px); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 88%;
  letter-spacing: -0.012em;
  line-height: 1.05;
  text-wrap: balance;
}

h1 { font-size: clamp(44px, 7vw, 96px); line-height: 0.98; font-weight: 900; }
h2 { font-size: clamp(32px, 4.4vw, 64px); }
h3 { font-size: clamp(24px, 2.6vw, 32px); line-height: 1.12; }
h4 { font-size: 18px; font-weight: 700; line-height: 1.35; letter-spacing: 0; }

strong { font-weight: 700; }

::selection { background: var(--teal); color: var(--pitch-900); }

/* ---------- 文字工具 ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  line-height: 0.98;
  letter-spacing: -0.015em;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--moss-ink);
}

.lede {
  font-size: 18px;
  line-height: 1.72;
  color: var(--pitch-600);
  max-width: 60ch;
}

.prose { max-width: 68ch; font-size: 17px; line-height: 1.78; }
.prose p + p { margin-top: 1.1em; }

.rule {
  height: 1px;
  border: 0;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 4px, transparent 4px 9px);
}

.on-dark {
  background: var(--pitch-800);
  color: var(--paper);
}
.on-dark .eyebrow,
.on-dark .lede { color: var(--moss); }
.on-dark .rule {
  background-image: repeating-linear-gradient(90deg, rgba(201, 214, 207, 0.35) 0 4px, transparent 4px 9px);
}

/* ---------- 容器与栅格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid { display: grid; gap: var(--gap, 24px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.span-1 { grid-column: span 1; }
.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-10 { grid-column: span 10; }
.span-11 { grid-column: span 11; }
.span-12 { grid-column: span 12; }

@media (max-width: 760px) {
  .grid--12 > * { grid-column: 1 / -1; }
}

/* ---------- 焦点与可见性 ---------- */
:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(11, 61, 46, 0.22);
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 10px;
  z-index: 300;
  padding: 10px 16px;
  background: var(--teal);
  color: var(--pitch-900);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: 2px;
  transform: translateY(-260%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

html.is-nav-open { overflow: hidden; }

/* ---------- 按钮 ---------- */
.ng-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.ng-btn--primary {
  background: var(--red);
  border-color: var(--red);
  color: var(--white);
}
.ng-btn--primary:hover { background: var(--red-deep); border-color: var(--red-deep); }
.ng-btn--ghost {
  background: rgba(43, 232, 176, 0.07);
  border-color: var(--pitch-600);
  color: var(--paper);
}
.ng-btn--ghost:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--pitch-900);
}
.ng-btn--light {
  background: transparent;
  border-color: var(--line);
  color: var(--pitch-800);
}
.ng-btn--light:hover {
  background: var(--pitch-800);
  border-color: var(--pitch-800);
  color: var(--white);
}

/* ============================================================
   页头：56px 命令栏 + 10px 刻度带
   ============================================================ */
.ng-header {
  --header-h: 56px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--pitch-900);
  color: var(--paper);
  border-bottom: 1px solid var(--pitch-600);
}
.ng-header[data-compact] { --header-h: 40px; }

.ng-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--header-h);
  transition: height 0.25s var(--ease);
}

/* 品牌 */
.ng-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 6px 0;
}
.ng-brand__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.18);
}
.ng-brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 90%;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--white);
  line-height: 1;
}
.ng-brand__tag {
  padding-left: 10px;
  border-left: 1px solid var(--pitch-600);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--moss);
  line-height: 1.2;
}

/* 导航 */
.ng-nav {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}
.ng-nav__head { display: none; }
.ng-nav__list { display: flex; align-items: center; gap: 2px; }
.ng-nav__desc { display: none; }
.ng-nav__tail { display: none; }

.ng-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 11px;
  border-radius: 3px;
  font-size: 13px;
  line-height: 1;
  color: var(--moss);
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}
.ng-nav__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: #5E8F79;
  transition: color 0.18s var(--ease);
}
.ng-nav__text {
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.ng-nav__link:hover,
.ng-nav__link:focus-visible {
  color: var(--white);
  background: rgba(43, 232, 176, 0.1);
}
.ng-nav__link:hover .ng-nav__num { color: var(--teal); }

.ng-nav__link[aria-current="page"] {
  color: var(--white);
  background: rgba(230, 57, 70, 0.14);
}
.ng-nav__link[aria-current="page"] .ng-nav__num { color: var(--red); }
.ng-nav__link[aria-current="page"] .ng-nav__text::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--red);
  vertical-align: 2px;
}

/* 页头动作区 */
.ng-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.ng-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--pitch-600);
  border-radius: 50%;
  color: var(--moss);
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.ng-icon-link svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
}
.ng-icon-link:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--pitch-900);
}

/* 移动端展开按钮 */
.ng-nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 8px 10px;
  border: 1px solid var(--pitch-600);
  border-radius: 2px;
  color: var(--paper);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.ng-nav-toggle:hover { border-color: var(--teal); background: rgba(43, 232, 176, 0.08); }
.ng-nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}
.ng-nav-toggle__bars span {
  display: block;
  height: 2px;
  background: var(--teal);
  transition: transform 0.2s var(--ease);
}
.ng-nav-toggle[aria-expanded="true"] .ng-nav-toggle__bars span:first-child {
  transform: translateY(3px) rotate(45deg);
}
.ng-nav-toggle[aria-expanded="true"] .ng-nav-toggle__bars span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}
.ng-nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* 刻度带 */
.ng-header__progress {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--header-strip);
  padding: 0 var(--gutter);
  background: var(--pitch-750);
  border-top: 1px solid rgba(201, 214, 207, 0.1);
  overflow: hidden;
}
.ng-progress__bar {
  position: absolute;
  left: 0;
  top: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--teal), var(--violet));
  transition: width 0.12s linear;
}
.ng-progress__dots {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 2px;
}
.ng-progress__dot {
  display: block;
  width: 12px;
  height: 2px;
  background: var(--pitch-600);
  transition: background 0.2s var(--ease), height 0.2s var(--ease);
}
.ng-progress__dot.is-past { background: var(--teal); }
.ng-progress__dot.is-current { height: 4px; background: var(--yellow); }
.ng-progress__num {
  margin-left: auto;
  font-size: 10px;
  line-height: 1;
  color: var(--moss);
}

/* 移动端断点：全屏索引 */
@media (max-width: 980px) {
  .ng-header__actions { display: none; }
  .ng-nav-toggle { display: inline-flex; }
  .ng-brand__tag { display: none; }

  .ng-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: calc(var(--header-h) + var(--header-strip));
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 22px var(--gutter) 48px;
    background: var(--pitch-900);
    border-top: 1px solid var(--pitch-600);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s var(--ease);
  }
  .ng-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .ng-nav__head {
    display: block;
    margin-bottom: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--moss);
  }
  .ng-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .ng-nav__item { border-bottom: 1px dashed rgba(201, 214, 207, 0.18); }
  .ng-nav__link {
    display: grid;
    grid-template-columns: 32px minmax(0, 1fr);
    grid-template-areas:
      "num text"
      "num desc";
    gap: 2px 12px;
    padding: 15px 2px;
    border-radius: 0;
    font-size: 22px;
    color: var(--paper);
  }
  .ng-nav__num {
    grid-area: num;
    padding-top: 6px;
    font-size: 12px;
    color: var(--teal);
  }
  .ng-nav__text {
    grid-area: text;
    font-family: var(--font-display);
    font-weight: 800;
    font-stretch: 90%;
    font-size: 22px;
    letter-spacing: 0.01em;
    color: var(--white);
  }
  .ng-nav__desc {
    grid-area: desc;
    display: block;
    font-size: 13px;
    color: var(--moss);
    letter-spacing: 0.02em;
  }
  .ng-nav__link:hover,
  .ng-nav__link:focus-visible { background: rgba(43, 232, 176, 0.08); }
  .ng-nav__link[aria-current="page"] { background: transparent; }
  .ng-nav__link[aria-current="page"] .ng-nav__num { color: var(--red); }
  .ng-nav__link[aria-current="page"] .ng-nav__text::before {
    width: 6px;
    height: 6px;
    margin-right: 8px;
    vertical-align: 4px;
  }

  .ng-nav__tail {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-top: 26px;
  }
  .ng-nav__mail {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--moss);
  }
  .ng-progress__dots { display: none; }
}

@media (max-width: 380px) {
  .ng-brand__name { font-size: 17px; }
  .ng-nav-toggle__label { display: none; }
}

/* ============================================================
   页脚：深绿四栏档案卡
   ============================================================ */
.ng-footer {
  background: var(--pitch-900);
  color: var(--paper);
  border-top: 1px solid var(--pitch-600);
  padding-top: 52px;
}
.ng-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1fr;
  gap: 40px 32px;
  padding-bottom: 40px;
}
.ng-footer__col { min-width: 0; }

.ng-footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.ng-footer__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--red);
}
.ng-footer__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 90%;
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--white);
  line-height: 1;
}
.ng-footer__line {
  max-width: 32ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--moss);
  margin-bottom: 14px;
}

.ng-footer__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  line-height: 1.4;
}

.ng-footer__list { display: grid; gap: 9px; }

.ng-footer__link {
  font-size: 14px;
  color: var(--moss);
  transition: color 0.18s var(--ease);
}
.ng-footer__link:hover,
.ng-footer__link:focus-visible {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--teal);
}

.ng-footer__meta {
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
}
.ng-footer__meta .num { color: var(--paper); }

.ng-footer__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
  margin-bottom: 12px;
}

.ng-footer__top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 8px 12px;
  border: 1px solid var(--pitch-600);
  border-radius: 2px;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.ng-footer__top:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--pitch-900);
}

.ng-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px 26px;
  border-top: 1px solid rgba(201, 214, 207, 0.14);
}
.ng-footer__copyright,
.ng-footer__legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #7E9389;
}
.ng-footer__legal a { color: #7E9389; transition: color 0.18s var(--ease); }
.ng-footer__legal a:hover,
.ng-footer__legal a:focus-visible { color: var(--teal); }

@media (max-width: 980px) {
  .ng-footer__grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
}
@media (max-width: 620px) {
  .ng-footer { padding-top: 40px; }
  .ng-footer__grid { grid-template-columns: 1fr; gap: 28px; }
  .ng-footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ============================================================
   基础组件：状态条 / 面包屑 / chip / 卡片 / 媒体容器 / 反馈
   ============================================================ */

/* 章节状态条 */
.section-mark {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section-mark__index {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--teal-ink);
}
.section-mark__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.section-mark__state {
  margin-left: auto;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--moss-ink);
  white-space: nowrap;
}
.on-dark .section-mark { border-color: rgba(201, 214, 207, 0.22); }
.on-dark .section-mark__index { color: var(--teal); }
.on-dark .section-mark__name { color: var(--white); }
.on-dark .section-mark__state { border-color: rgba(201, 214, 207, 0.28); color: var(--moss); }

/* 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--moss-ink);
}
.breadcrumbs__item { color: inherit; transition: color 0.18s var(--ease); }
a.breadcrumbs__item:hover,
a.breadcrumbs__item:focus-visible { color: var(--teal-ink); }
.breadcrumbs__sep { color: var(--line); }
.breadcrumbs [aria-current="page"] { color: var(--ink); }
.on-dark .breadcrumbs { color: var(--moss); }
.on-dark .breadcrumbs [aria-current="page"] { color: var(--white); }

/* 筛选 chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--pitch-800);
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.chip:hover { border-color: var(--pitch-600); }
.chip__count {
  padding-left: 8px;
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--moss-ink);
}
.chip[aria-pressed="true"] {
  background: var(--pitch-800);
  border-color: var(--pitch-800);
  color: var(--white);
}
.chip[aria-pressed="true"] .chip__count {
  border-color: rgba(255, 255, 255, 0.28);
  color: var(--teal);
}

/* 卡片 */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  padding: 22px;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.card:hover { border-color: var(--pitch-600); }
.card__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-ink);
}
.card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 90%;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.card__meta {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss-ink);
}
.card--dark {
  background: var(--pitch-800);
  border-color: var(--pitch-600);
  color: var(--paper);
}
.card--dark:hover { border-color: var(--teal); }
.card--dark .card__label { color: var(--teal); }
.card--dark .card__title { color: var(--white); }
.card--dark .card__meta { color: var(--moss); }

/* 媒体容器（响应式图片占位） */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--pitch-600);
  border-radius: var(--radius-organic);
  background: linear-gradient(180deg, var(--pitch-800), var(--pitch-900));
}
.media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(43, 232, 176, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 232, 176, 0.13) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.6;
  pointer-events: none;
}
.media > img,
.media > picture,
.media > svg,
.media > video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--3x2 { aspect-ratio: 3 / 2; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: 22px 14px 10px;
  background: linear-gradient(180deg, transparent, rgba(8, 38, 28, 0.88));
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(244, 246, 243, 0.86);
}

/* 一行式操作反馈 */
.statusline {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-left: 3px solid var(--teal-ink);
  border-radius: 2px;
  background: rgba(43, 232, 176, 0.14);
  font-size: 13px;
  line-height: 1.6;
  color: var(--pitch-800);
}
.statusline.is-visible { display: flex; }
.statusline.is-error {
  border-left-color: var(--red);
  background: rgba(230, 57, 70, 0.12);
  color: #8C1F27;
}

/* 滚动显现 */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.has-js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 降低动效 ---------- */
@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;
  }
  .has-js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .ng-nav { transition: none; }
  .ng-header__inner { transition: none; }
  .ng-progress__bar { transition: none; }
}