/* ==========================================================================
   BOB体官网 · Site Kit (fingerprint bccf2c1e088b0913)
   夜间赛场数据指挥台：深靛蓝夜色 / 荧光青边线 / 橙红版本锚点
   ========================================================================== */

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

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

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

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

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

button,
input,
select,
textarea { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

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

[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩：夜色 → 面板 → 边线 → 锚点 */
  --ink:        #050B1A;  /* 深夜靛蓝 */
  --cabin:      #0A1730;  /* 数据舱蓝 */
  --panel:      #12294D;  /* 面板蓝 */
  --line:       #24466F;  /* 网格线蓝 */
  --cyan:       #35F2E2;  /* 荧光青 */
  --cyan-soft:  #B8FFF7;  /* 浅青高光 */
  --flame:      #FF5A36;  /* 活力橙红 */
  --white:      #F4F7FF;  /* 赛场白 */
  --mist:       #A9BDD9;  /* 雾蓝次级 */
  --green:      #3BE38F;  /* 数据绿 */

  /* 字体：系统无衬线 + 等宽数字 */
  --font: "Noto Sans SC", "Source Han Sans SC", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system,
          "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular,
          Menlo, Consolas, "Liberation Mono", monospace;

  /* 尺度 */
  --wrap: 1280px;
  --wrap-narrow: 820px;
  --wrap-wide: 1480px;
  --gutter: clamp(1rem, 4vw, 3.25rem);

  /* 动效 */
  --speed: .22s;
  --ease: cubic-bezier(.2, .7, .3, 1);
  --border: 1px solid var(--line);
}

/* ---------- 3. 中文排版与页面底色 ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 640px at 50% -14%, rgba(53, 242, 226, .10), transparent 62%),
    radial-gradient(900px 520px at 88% 6%, rgba(255, 90, 54, .08), transparent 60%),
    var(--ink);
  color: var(--white);
  font-family: var(--font);
  font-size: clamp(15px, .35vw + 14px, 17px);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 赛场网格：仅在页面上缘显影 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(36, 70, 111, .30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 70, 111, .30) 1px, transparent 1px);
  background-size: 104px 104px;
  -webkit-mask-image: radial-gradient(125% 80% at 50% 0%, #000 0%, transparent 72%);
          mask-image: radial-gradient(125% 80% at 50% 0%, #000 0%, transparent 72%);
  opacity: .55;
}

main {
  position: relative;
  z-index: 1;
  display: block;
}

#main-content { scroll-margin-top: 140px; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--white);
  text-wrap: balance;
}

h1 { font-size: clamp(2.05rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.5rem, 2.9vw, 2.3rem); }
h3 { font-size: clamp(1.12rem, 1.6vw, 1.4rem); }
h4 { font-size: clamp(1rem, 1.2vw, 1.12rem); }

p { max-width: 74ch; }

strong, b { font-weight: 700; color: var(--cyan-soft); }

small { font-size: .82em; color: var(--mist); }

a {
  color: var(--cyan);
  text-decoration: none;
  text-underline-offset: .28em;
  transition: color var(--speed) var(--ease);
}

a:hover {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

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

hr {
  border: 0;
  border-top: var(--border);
  margin-block: clamp(1.6rem, 3vw, 2.6rem);
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  top: .5rem;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -180%);
  padding: .66rem 1.15rem;
  background: var(--cyan);
  color: var(--ink);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .04em;
  border: 2px solid var(--ink);
  transition: transform var(--speed) var(--ease);
}

.skip-link:hover { color: var(--ink); text-decoration: none; }

.skip-link:focus {
  transform: translate(-50%, 0);
  color: var(--ink);
  outline: 2px solid var(--white);
  outline-offset: 2px;
}

/* ---------- 5. 刊头 Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(5, 11, 26, .985) 0%, rgba(10, 23, 48, .97) 100%);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px) saturate(1.1);
          backdrop-filter: blur(10px) saturate(1.1);
}

/* 顶部三色扫描条：橙红 / 边线 / 荧光青 */
.header-scanline {
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--flame) 0 16%,
    var(--line) 16% 34%,
    var(--cyan) 34% 64%,
    var(--line) 64% 100%
  );
  opacity: .9;
}

/* 刊头三栏：左 kicker / 中报头 / 右版本牌 */
.masthead {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(.8rem, 1.6vw, 1.15rem) var(--gutter) clamp(.7rem, 1.3vw, .95rem);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: .6rem 1rem;
}

.masthead::after {
  content: "";
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(53, 242, 226, .55) 20%,
    rgba(53, 242, 226, .55) 80%,
    transparent 100%);
}

.masthead__kicker {
  margin: 0;
  max-width: none;
  font-family: var(--mono);
  font-size: .68rem;
  line-height: 1.5;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.masthead__brand {
  justify-self: center;
  display: inline-flex;
  align-items: baseline;
  gap: .1em;
  padding: .12rem .1rem .3rem;
  font-family: var(--font);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  letter-spacing: -.04em;
  line-height: 1;
  color: var(--white);
  transform: skewX(-4deg);
  transition: color var(--speed) var(--ease), text-shadow var(--speed) var(--ease);
}

.masthead__brand span { color: var(--cyan); }

.masthead__brand:hover {
  color: var(--white);
  text-decoration: none;
  text-shadow: 0 0 24px rgba(53, 242, 226, .5);
}

.masthead__brand:hover span { color: var(--cyan-soft); }

.masthead__meta {
  justify-self: end;
  margin: 0;
  max-width: none;
  padding: .22rem .58rem;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .16em;
  line-height: 1.5;
  color: var(--cyan);
  background: rgba(53, 242, 226, .08);
  border: 1px solid rgba(53, 242, 226, .42);
  white-space: nowrap;
}

/* 导航条 */
.site-nav {
  position: relative;
  background: rgba(10, 23, 48, .62);
}

.site-nav__inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  min-height: 54px;
  padding: .15rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: .1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  display: block;
  padding: .62rem .88rem;
  font-size: .94rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: rgba(244, 247, 255, .86);
  border-bottom: 2px solid transparent;
  transition: color var(--speed) var(--ease),
              background var(--speed) var(--ease),
              border-color var(--speed) var(--ease);
}

.nav-list a:hover {
  color: var(--cyan);
  background: rgba(53, 242, 226, .07);
  text-decoration: none;
}

.nav-list a[aria-current="page"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  background: rgba(53, 242, 226, .06);
}

/* 右侧资料下载快捷入口 */
.nav-quick {
  position: absolute;
  right: var(--gutter);
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .46rem .95rem;
  font-family: var(--mono);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1.4;
  color: #1A0600;
  background: var(--flame);
  border: 1px solid rgba(255, 119, 88, .8);
  box-shadow: 0 0 0 1px rgba(5, 11, 26, .95), 0 10px 22px -12px rgba(255, 90, 54, .95);
  transition: background var(--speed) var(--ease),
              transform var(--speed) var(--ease),
              box-shadow var(--speed) var(--ease);
}

.nav-quick::before {
  content: "";
  width: 6px;
  height: 6px;
  background: #1A0600;
  border-radius: 50%;
  flex: none;
}

.nav-quick:hover {
  color: #1A0600;
  background: #FF7758;
  text-decoration: none;
  transform: translateY(calc(-50% - 2px));
  box-shadow: 0 0 0 1px rgba(5, 11, 26, .95), 0 16px 28px -14px rgba(255, 90, 54, 1);
}

/* 移动目录按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  padding: .5rem .85rem;
  color: var(--white);
  background: rgba(18, 41, 77, .7);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .14em;
  transition: border-color var(--speed) var(--ease), color var(--speed) var(--ease);
}

.nav-toggle:hover { color: var(--cyan); border-color: rgba(53, 242, 226, .6); }

.nav-toggle__text { line-height: 1.2; }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--cyan);
  flex: none;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--cyan);
  transition: transform var(--speed) var(--ease),
              top var(--speed) var(--ease),
              opacity var(--speed) var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after  { top: 6px; }

.site-nav[data-open="true"] .nav-toggle { color: var(--cyan); border-color: rgba(53, 242, 226, .7); }
.site-nav[data-open="true"] .nav-toggle__bars { background: transparent; }
.site-nav[data-open="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.site-nav[data-open="true"] .nav-toggle__bars::after  { top: 0; transform: rotate(-45deg); }

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft));
  box-shadow: 0 0 12px rgba(53, 242, 226, .75);
  transition: width .12s linear;
}

/* ---------- 6. 页脚 Footer ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(3rem, 7vw, 5.5rem);
  overflow: hidden;
  color: var(--mist);
  background: linear-gradient(180deg,
    rgba(10, 23, 48, .55) 0%,
    var(--cabin) 42%,
    #060D1E 100%);
  border-top: 1px solid var(--line);
}

.footer-aura {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 300px;
  pointer-events: none;
  background:
    radial-gradient(540px 230px at 10% 100%, rgba(53, 242, 226, .17), transparent 70%),
    radial-gradient(540px 250px at 90% 100%, rgba(255, 90, 54, .15), transparent 70%);
}

.footer-inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(2rem, 4vw, 3.4rem) var(--gutter) 1.6rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1.2fr .9fr;
  gap: clamp(1.5rem, 3vw, 3rem);
  padding-bottom: clamp(1.6rem, 3vw, 2.6rem);
  border-bottom: 1px solid rgba(36, 70, 111, .8);
}

.footer-brand { min-width: 0; }

.footer-brand__mark {
  display: inline-block;
  margin-bottom: .9rem;
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -.035em;
  line-height: 1;
  color: var(--white);
  transform: skewX(-4deg);
}

.footer-brand__mark span { color: var(--cyan); }

.footer-brand__mark:hover { color: var(--white); text-decoration: none; }
.footer-brand__mark:hover span { color: var(--cyan-soft); }

.footer-brand__text {
  max-width: 32ch;
  margin-bottom: 1rem;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--mist);
}

.footer-brand__stamp {
  display: flex;
  align-items: center;
  gap: .6rem;
  max-width: none;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: rgba(169, 189, 217, .82);
}

.footer-brand__edition { line-height: 1.4; }

.stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.4rem;
  padding: .18rem .45rem;
  background: var(--cyan);
  color: #03130F;
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  border-radius: 1px;
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin-bottom: 1rem;
  padding-bottom: .6rem;
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  border-bottom: 1px solid rgba(36, 70, 111, .85);
}

.footer-list {
  display: grid;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-list li {
  font-size: .92rem;
  line-height: 1.6;
  color: rgba(244, 247, 255, .82);
}

.footer-list a { color: rgba(244, 247, 255, .82); font-weight: 500; }
.footer-list a:hover { color: var(--cyan); text-decoration: none; }

.footer-list--plain li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .5rem;
  align-items: baseline;
  word-break: break-word;
}

.footer-label {
  padding: .04rem .32rem;
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .1em;
  color: rgba(169, 189, 217, .78);
  border: 1px solid rgba(36, 70, 111, .95);
  white-space: nowrap;
}

.footer-baseline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1.5rem;
  padding-top: 1.2rem;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: rgba(169, 189, 217, .72);
}

.footer-copy,
.footer-icp,
.footer-note { margin: 0; max-width: none; }

.footer-icp { color: rgba(184, 255, 247, .78); }
.footer-note { margin-left: auto; }

/* ---------- 7. 通用版式 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow { max-width: var(--wrap-narrow); }
.container--wide { max-width: var(--wrap-wide); }

.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section--tight { padding-block: clamp(1.4rem, 3vw, 2.4rem); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin: 0 0 .9rem;
  padding: .2rem .58rem;
  max-width: none;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(53, 242, 226, .07);
  border: 1px solid rgba(53, 242, 226, .35);
}

.lede {
  max-width: 68ch;
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  line-height: 1.85;
  color: rgba(244, 247, 255, .88);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 2rem);
}

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

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .78rem 1.5rem;
  font-family: var(--font);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 1px;
  cursor: pointer;
  transition: transform var(--speed) var(--ease),
              background var(--speed) var(--ease),
              color var(--speed) var(--ease),
              border-color var(--speed) var(--ease),
              box-shadow var(--speed) var(--ease);
}

.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--flame {
  color: #1A0600;
  background: var(--flame);
  border-color: #FF7758;
  box-shadow: 0 12px 28px -16px rgba(255, 90, 54, .95);
}

.btn--flame:hover { color: #1A0600; background: #FF7758; }

.btn--cyan {
  color: #03130F;
  background: var(--cyan);
  border-color: var(--cyan-soft);
}

.btn--cyan:hover { color: #03130F; background: var(--cyan-soft); }

.btn--ghost {
  color: var(--white);
  background: transparent;
  border-color: var(--line);
}

.btn--ghost:hover {
  color: var(--cyan);
  background: rgba(53, 242, 226, .08);
  border-color: var(--cyan);
}

.btn--sm { padding: .5rem 1rem; font-size: .82rem; }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  margin-block: 1.5rem .5rem;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--mist);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb__list li { display: inline-flex; align-items: center; gap: .45rem; }

.breadcrumb__list li + li::before {
  content: "/";
  color: var(--line);
}

.breadcrumb a { color: var(--mist); }
.breadcrumb a:hover { color: var(--cyan); text-decoration: none; }

.breadcrumb__current { color: var(--cyan); }

/* ---------- 10. 图片容器（页面阶段放占位图） ---------- */
.media { position: relative; margin: 0; }

.media__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(18, 41, 77, .95), rgba(5, 11, 26, .95));
  aspect-ratio: 16 / 9;
}

.media__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 52%, rgba(5, 11, 26, .86) 100%);
}

.media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.95) contrast(1.06);
}

.media__caption {
  margin-top: .65rem;
  max-width: none;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--mist);
}

.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--tall .media__frame { aspect-ratio: 4 / 5; }
.media--square .media__frame { aspect-ratio: 1 / 1; }

/* ---------- 11. 卡片 / 标签 / 长文 ---------- */
.card {
  position: relative;
  padding: clamp(1.1rem, 2vw, 1.6rem);
  background: linear-gradient(160deg, rgba(18, 41, 77, .74), rgba(10, 23, 48, .74));
  border: 1px solid var(--line);
  transition: transform var(--speed) var(--ease),
              border-color var(--speed) var(--ease),
              box-shadow var(--speed) var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(53, 242, 226, .55);
  box-shadow: 0 22px 44px -32px rgba(53, 242, 226, .9);
}

.card__label {
  margin: 0 0 .6rem;
  max-width: none;
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.card__title { margin: 0 0 .55rem; font-size: 1.12rem; }

.card__text {
  margin: 0;
  max-width: none;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--mist);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .22rem .6rem;
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--mist);
  background: rgba(18, 41, 77, .55);
  border: 1px solid var(--line);
}

.tag--cyan {
  color: var(--cyan);
  background: rgba(53, 242, 226, .08);
  border-color: rgba(53, 242, 226, .45);
}

.tag--flame {
  color: #FFB9A8;
  background: rgba(255, 90, 54, .1);
  border-color: rgba(255, 90, 54, .5);
}

.mono {
  font-family: var(--mono);
  letter-spacing: .04em;
}

.prose {
  max-width: 68ch;
  color: rgba(244, 247, 255, .88);
}

.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 1.7em; }
.prose h3 { margin-top: 1.35em; }
.prose ul,
.prose ol { padding-left: 1.25em; }
.prose li + li { margin-top: .35em; }
.prose p { max-width: none; }

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

/* ---------- 12. 显现 ---------- */
.reveal { will-change: opacity, transform; }

.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .32s var(--ease), transform .32s var(--ease);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1.25fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .site-nav__inner {
    justify-content: flex-start;
    min-height: 58px;
    padding-block: .4rem;
    gap: .6rem;
  }

  .nav-quick {
    position: static;
    transform: none;
    margin-left: auto;
    padding: .42rem .72rem;
    font-size: .7rem;
    letter-spacing: .08em;
  }

  .nav-quick:hover { transform: translateY(-1px); }

  .nav-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 5;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .4rem var(--gutter) 1rem;
    background: linear-gradient(180deg, rgba(10, 23, 48, .995), rgba(5, 11, 26, .995));
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 28px 52px -24px rgba(0, 0, 0, .95);
    max-height: min(70vh, 520px);
    overflow-y: auto;
  }

  .site-nav[data-open="true"] .nav-list { display: flex; }

  .nav-list a {
    padding: .85rem .25rem;
    font-size: 1rem;
    border-bottom: 1px solid rgba(36, 70, 111, .7);
  }

  .nav-list li:last-child a { border-bottom: 0; }
  .nav-list a[aria-current="page"] { border-bottom-color: var(--cyan); }
}

@media (max-width: 900px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .masthead {
    grid-template-columns: 1fr auto;
    row-gap: .5rem;
    padding-block: .8rem .7rem;
  }

  .masthead__kicker {
    grid-column: 1;
    grid-row: 1;
    font-size: .6rem;
    letter-spacing: .18em;
  }

  .masthead__meta {
    grid-column: 2;
    grid-row: 1;
    font-size: .6rem;
    padding: .16rem .45rem;
  }

  .masthead__brand {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: start;
    font-size: clamp(1.7rem, 7vw, 2.2rem);
  }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }

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

  .footer-note { margin-left: 0; }

  .breadcrumb { margin-block: 1.1rem .3rem; }
}

@media (max-width: 420px) {
  .masthead__kicker { display: none; }
  .masthead { grid-template-columns: 1fr auto; }
  .masthead__meta { grid-column: 2; }
  .nav-toggle { padding: .45rem .6rem; }
  .nav-toggle__text { font-size: .72rem; }
}

/* ---------- 14. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }

  .js .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .scroll-progress__bar { transition: none !important; }

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