/* ==========================================================================
   宝威赛场 · site.css
   共享外壳（刊头导航 / 页脚）、设计令牌、通用组件与响应式基础
   ========================================================================== */

:root {
  /* 色彩令牌 */
  --ink-950: #04121F;
  --ink-900: #0A2740;
  --ink-700: #123B5C;
  --ink-800: #14181D;
  --cyan-400: #2DF5D4;
  --cyan-200: #9CF7E7;
  --coral-500: #FF6B4A;
  --paper-100: #F2EEE7;
  --paper-300: #D8D2C8;
  --paper-050: #FFFDF8;
  --slate-500: #5E7C93;

  /* 字体令牌 */
  --font-display: 'Barlow Condensed', 'Oswald', 'Noto Sans SC', sans-serif;
  --font-heading: 'Barlow Condensed', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', sans-serif;
  --font-mono: 'Roboto Mono', 'IBM Plex Mono', 'JetBrains Mono', monospace;

  /* 尺寸与节奏 */
  --radius: 14px;
  --shadow-hard: 6px 6px 0 var(--ink-800);
  --shadow-cyan: 6px 6px 0 var(--cyan-400);
  --edge: clamp(1rem, 3.2vw, 2.5rem);
  --maxw: 1320px;
  --t-fast: .18s;
  --t-base: .24s;
}

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

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

body {
  margin: 0;
  background: var(--paper-100);
  color: var(--ink-800);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  line-break: strict;
  word-break: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
img, svg, video, picture { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
table { border-collapse: collapse; width: 100%; }
h1, h2, h3, .display, .section-title { text-wrap: balance; }
p { text-wrap: pretty; }

:focus-visible {
  outline: 2px solid var(--ink-950);
  outline-offset: 3px;
  border-radius: 4px;
}
.site-header :focus-visible,
.site-footer :focus-visible,
.section--dark :focus-visible,
.section--ink :focus-visible,
.card--dark :focus-visible {
  outline-color: var(--cyan-400);
}

/* --------------------------------------------------------------------------
   布局容器与分区节奏
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--edge);
}
.wrap--narrow { max-width: 860px; }

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }
.section--dark { background: var(--ink-950); color: var(--paper-100); }
.section--ink { background: var(--ink-900); color: var(--paper-050); }
.section--paper { background: var(--paper-100); color: var(--ink-800); }
.section--card { background: var(--paper-050); color: var(--ink-800); }

.stack > * + * { margin-top: clamp(1rem, 2.2vw, 1.6rem); }
.stack--tight > * + * { margin-top: .6rem; }

.rule {
  height: 2px;
  border: 0;
  margin-block: clamp(1.5rem, 3vw, 2.5rem);
  background: var(--paper-300);
}
.section--dark .rule,
.section--ink .rule { background: var(--ink-700); }

/* --------------------------------------------------------------------------
   中文排版与文本层级
   -------------------------------------------------------------------------- */
.display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 7vw, 6rem);
  line-height: .95;
  letter-spacing: -.02em;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: .01em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-700);
}
.eyebrow::before {
  content: "";
  width: 16px;
  height: 2px;
  background: currentColor;
  flex: none;
}
.section--dark .eyebrow,
.section--ink .eyebrow { color: var(--cyan-400); }

.lede {
  font-size: clamp(1rem, 1.2vw, 1.0625rem);
  line-height: 1.8;
  color: var(--ink-700);
  max-width: 62ch;
}
.section--dark .lede,
.section--ink .lede,
.card--dark .lede { color: var(--paper-300); }

.note {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--slate-500);
}

/* 长文阅读区 */
.prose { max-width: 70ch; }
.prose h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  line-height: 1.2;
  letter-spacing: .01em;
  margin-top: clamp(2rem, 4vw, 3rem);
  margin-bottom: .7rem;
}
.prose h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
  line-height: 1.3;
  margin-top: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: .5rem;
}
.prose h2:first-child,
.prose h3:first-child { margin-top: 0; }
.prose p + p { margin-top: 1.25rem; }
.prose ul,
.prose ol { margin-top: 1rem; display: grid; gap: .6rem; }
.prose li { position: relative; padding-left: 1.5rem; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: .55rem;
  height: .55rem;
  background: var(--cyan-400);
  border: 1px solid var(--ink-800);
}
.prose a {
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 2px solid var(--cyan-400);
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}
.prose a:hover,
.prose a:focus-visible { color: var(--coral-500); border-bottom-color: var(--coral-500); }
.section--dark .prose a,
.section--ink .prose a { color: var(--cyan-200); }
.section--dark .prose a:hover,
.section--ink .prose a:hover { color: var(--coral-500); }

/* --------------------------------------------------------------------------
   网格系统
   -------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}
.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)); }
.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--4-8 { grid-template-columns: 4fr 8fr; }
.grid--3-6-3 { grid-template-columns: 3fr 6fr 3fr; }

/* --------------------------------------------------------------------------
   按钮 / 标签 / 卡片
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 1.35rem;
  border-radius: var(--radius);
  border: 2px solid var(--ink-800);
  background: var(--paper-050);
  color: var(--ink-800);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .03em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--t-base) ease, box-shadow var(--t-base) ease,
              background var(--t-base) ease, color var(--t-base) ease,
              border-color var(--t-base) ease;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--ink-800); }
.btn:active { transform: translate(0, 0); box-shadow: none; }

.btn--coral {
  background: var(--coral-500);
  border-color: var(--ink-800);
  color: var(--ink-800);
  box-shadow: 4px 4px 0 var(--ink-800);
}
.btn--coral:hover { box-shadow: 7px 7px 0 var(--ink-800); }

.btn--cyan {
  background: var(--cyan-400);
  border-color: var(--ink-950);
  color: var(--ink-950);
  box-shadow: 4px 4px 0 var(--ink-950);
}
.btn--cyan:hover { box-shadow: 7px 7px 0 var(--ink-950); }

.btn--ghost {
  background: transparent;
  border-color: var(--cyan-400);
  color: var(--cyan-400);
  box-shadow: none;
}
.btn--ghost:hover {
  background: var(--cyan-400);
  color: var(--ink-950);
  box-shadow: 6px 6px 0 rgba(45, 245, 212, .22);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .32rem .7rem;
  border-radius: 999px;
  border: 1px solid var(--paper-300);
  background: transparent;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  line-height: 1.4;
  color: var(--ink-700);
  text-decoration: none;
  transition: border-color var(--t-fast) ease, color var(--t-fast) ease,
              background var(--t-fast) ease;
}
.chip:hover,
.chip:focus-visible { border-color: var(--coral-500); color: var(--ink-950); }
.chip--coral {
  background: var(--coral-500);
  border-color: var(--coral-500);
  color: var(--ink-800);
  font-weight: 700;
}
.chip--cyan {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-950);
  font-weight: 700;
}
.section--dark .chip,
.section--ink .chip { border-color: var(--ink-700); color: var(--paper-300); }

.card {
  position: relative;
  padding: clamp(1.1rem, 2vw, 1.6rem);
  border-radius: var(--radius);
  border: 2px solid var(--ink-800);
  background: var(--paper-050);
  color: var(--ink-800);
  box-shadow: var(--shadow-hard);
  transition: transform var(--t-base) ease, box-shadow var(--t-base) ease,
              border-color var(--t-base) ease;
}
.card:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--ink-800); }

.card--dark {
  background: var(--ink-900);
  color: var(--paper-100);
  border: 1px solid var(--cyan-200);
  box-shadow: none;
}
.card--dark:hover {
  transform: translateY(-2px);
  border-color: var(--cyan-400);
  box-shadow: 0 0 0 1px var(--cyan-400);
}

.card__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  line-height: 1.25;
  letter-spacing: .01em;
}
.card__meta {
  display: block;
  margin-bottom: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate-500);
}
.card--dark .card__meta { color: var(--cyan-200); }

/* --------------------------------------------------------------------------
   面包屑
   -------------------------------------------------------------------------- */
.breadcrumb { margin-block: 1.25rem .5rem; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--slate-500);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: .5rem; }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--paper-300);
}
.breadcrumb__link {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}
.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}
.section--dark .breadcrumb__list,
.section--ink .breadcrumb__list { color: var(--paper-300); }

/* --------------------------------------------------------------------------
   图片容器基础规则（页面阶段直接放入 img）
   -------------------------------------------------------------------------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  border: 2px solid var(--ink-800);
  background: var(--ink-700);
  box-shadow: var(--shadow-hard);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.media-frame--dark {
  border: 1px solid var(--cyan-200);
  box-shadow: none;
  background: var(--ink-900);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--tight { border-radius: 10px; }

.media-caption {
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--slate-500);
}
.section--dark .media-caption,
.section--ink .media-caption { color: var(--paper-300); }

/* --------------------------------------------------------------------------
   共享页头
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: var(--edge);
  top: -120px;
  z-index: 200;
  padding: .7rem 1.1rem;
  border-radius: 8px;
  background: var(--cyan-400);
  color: var(--ink-950);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .04em;
  text-decoration: none;
  transition: top var(--t-base) ease;
}
.skip-link:focus,
.skip-link:focus-visible {
  top: .6rem;
  outline-color: var(--ink-950);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink-900);
  color: var(--paper-050);
  border-bottom: 1px solid var(--ink-700);
  transition: background var(--t-base) ease, border-color var(--t-base) ease;
}
.site-header.is-stuck {
  background: var(--ink-950);
  border-bottom-color: var(--cyan-400);
}

/* 顶部微信息条 */
.topline {
  background: var(--ink-950);
  border-bottom: 1px solid rgba(45, 245, 212, .16);
}
.topline__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: .42rem var(--edge);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--paper-300);
}
.topline__note {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  white-space: nowrap;
}
.topline__dot {
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--cyan-400);
}

.quicklinks {
  display: flex;
  align-items: center;
  gap: clamp(.9rem, 2vw, 1.6rem);
}
.quicklinks__link {
  position: relative;
  padding-block: 2px;
  color: var(--paper-300);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast) ease;
}
.quicklinks__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) ease;
}
.quicklinks__link:hover,
.quicklinks__link:focus-visible { color: var(--cyan-400); }
.quicklinks__link:hover::after,
.quicklinks__link:focus-visible::after { transform: scaleX(1); }

/* 刊头 */
.masthead { border-bottom: 1px solid var(--ink-700); }
.masthead__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: .85rem var(--edge) .8rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}
.masthead__kicker {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--paper-300);
}
.masthead__meta {
  text-align: right;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .2em;
  color: var(--paper-300);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  justify-self: center;
  padding: .15rem .2rem;
  text-decoration: none;
  color: var(--paper-050);
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  flex: none;
  border: 2px solid var(--cyan-400);
  border-radius: 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .95rem;
  letter-spacing: .02em;
  color: var(--cyan-400);
  transition: background var(--t-base) ease, color var(--t-base) ease;
}
.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  background: var(--cyan-400);
  color: var(--ink-950);
}
.brand__text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  letter-spacing: .12em;
  line-height: 1;
}

/* 栏目导航 */
.navrail__inner {
  position: relative;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--edge);
  display: flex;
  align-items: center;
  justify-content: center;
}

.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(.2rem, 1.2vw, .8rem);
}
.primary-nav__link {
  position: relative;
  display: block;
  padding: .72rem clamp(.5rem, 1.2vw, .95rem);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .06em;
  color: var(--paper-100);
  text-decoration: none;
  transition: color var(--t-fast) ease, background var(--t-base) ease;
}
.primary-nav__link::after {
  content: "";
  position: absolute;
  left: clamp(.5rem, 1.2vw, .95rem);
  right: clamp(.5rem, 1.2vw, .95rem);
  bottom: .42rem;
  height: 2px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) ease;
}
.primary-nav__link:hover,
.primary-nav__link:focus-visible { color: var(--cyan-400); }
.primary-nav__link:hover::after,
.primary-nav__link:focus-visible::after { transform: scaleX(1); }
.primary-nav__link[aria-current="page"] { color: var(--cyan-400); }
.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* 移动端开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .6rem;
  padding: .7rem 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--cyan-400);
  cursor: pointer;
}
.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 20px;
  flex: none;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--t-base) ease, opacity var(--t-base) ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
  background: transparent;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .1s linear;
}

/* --------------------------------------------------------------------------
   共享页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--ink-950);
  color: var(--paper-100);
}

.footer-top {
  background: var(--ink-900);
  border-top: 1px solid var(--ink-700);
  border-bottom: 1px solid var(--ink-700);
}
.footer-top__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(1.6rem, 4vw, 2.6rem) var(--edge);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}
.footer-top__lead { max-width: 34ch; }
.footer-top__eyebrow {
  margin-bottom: .45rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan-400);
}
.footer-top__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--paper-050);
}

.footer-grid {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(1.75rem, 4vw, 2.75rem) var(--edge);
  display: grid;
  grid-template-columns: 1.4fr .8fr .8fr 1.1fr;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

.footer-brand__link {
  display: inline-block;
  padding-bottom: .15rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: .1em;
  color: var(--paper-050);
  text-decoration: none;
  border-bottom: 2px solid var(--cyan-400);
  transition: color var(--t-fast) ease;
}
.footer-brand__link:hover,
.footer-brand__link:focus-visible { color: var(--cyan-400); }
.footer-brand__desc {
  margin-top: .9rem;
  max-width: 26ch;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--paper-300);
}
.footer-brand__meta {
  margin-top: .9rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--cyan-200);
}

.footer-col__title {
  margin-bottom: .9rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan-400);
}
.footer-col__list {
  display: grid;
  gap: .45rem;
}
.footer-col__link {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  font-size: .95rem;
  color: var(--paper-100);
  text-decoration: none;
  transition: color var(--t-fast) ease;
}
.footer-col__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--coral-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) ease;
}
.footer-col__link:hover,
.footer-col__link:focus-visible { color: var(--coral-500); }
.footer-col__link:hover::after,
.footer-col__link:focus-visible::after { transform: scaleX(1); }

.footer-col__item {
  font-size: .9rem;
  line-height: 1.6;
  color: var(--paper-300);
  word-break: break-word;
}
.footer-col__label {
  display: block;
  margin-bottom: .1rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .16em;
  color: var(--cyan-200);
}

.footer-base { border-top: 1px solid var(--ink-700); }
.footer-base__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 1rem var(--edge) 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .4rem 1.5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--paper-300);
}
.footer-base__copy,
.footer-base__note,
.footer-base__icp { margin: 0; }
.footer-base__icp { color: var(--cyan-200); }

/* --------------------------------------------------------------------------
   滚动显现（仅在 JS 就绪时生效）
   -------------------------------------------------------------------------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--t-base) ease, transform var(--t-base) ease;
}
.js-reveal [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   响应式：平板与手机
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--5-7,
  .grid--7-5,
  .grid--4-8,
  .grid--3-6-3 { grid-template-columns: minmax(0, 1fr); }

  .masthead__inner {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    gap: .4rem;
    padding-block: .7rem;
  }
  .masthead__kicker,
  .masthead__meta { display: none; }

  .navrail__inner {
    justify-content: space-between;
    padding-block: .15rem;
  }
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    width: 100%;
    padding: .4rem var(--edge) 1rem;
    background: var(--ink-950);
    border-top: 1px solid var(--cyan-400);
    border-bottom: 1px solid var(--cyan-400);
    box-shadow: 0 18px 30px rgba(4, 18, 31, .55);
  }
  .primary-nav[data-open] { display: block; }
  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
  }
  .primary-nav__item { border-bottom: 1px solid rgba(156, 247, 231, .14); }
  .primary-nav__item:last-child { border-bottom: 0; }
  .primary-nav__link {
    padding: .85rem .2rem;
    font-size: 1.05rem;
  }
  .primary-nav__link::after {
    left: .2rem;
    right: auto;
    width: 1.4rem;
    bottom: .7rem;
  }
  .primary-nav__link[aria-current="page"] { background: rgba(45, 245, 212, .08); }

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

@media (max-width: 600px) {
  .topline__inner { justify-content: center; }
  .topline__note { display: none; }
  .quicklinks { gap: 1rem; font-size: .66rem; letter-spacing: .08em; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-top__inner { flex-direction: column; align-items: flex-start; }
  .footer-base__inner { justify-content: flex-start; }
}

/* --------------------------------------------------------------------------
   动效偏好
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js-reveal [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .scroll-progress__bar { transition: none; }
}