/* =========================================================
   诺亚体育主站 · 共享样式表  /assets/site.css
   深夜战术板被探照灯打亮：墨绿深处 + 荧光青描线 + 回合暖橙脉冲
   ========================================================= */

/* ---------- 1. RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 150px;
}
body, h1, h2, h3, h4, h5, p, ol, ul, li, figure, blockquote, dl, dd {
  margin: 0; padding: 0;
}
ol, ul { list-style: none; }
img, svg, picture { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; height: 1px; background: var(--line); }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #06201C;
  --ink-800: #0B2E28;
  --ink-700: #15443C;
  --cyan: #2FF3D6;
  --cyan-deep: #0FB9A6;
  --orange: #FF8A3D;
  --orange-soft: #FFC08A;
  --paper: #E9F1EE;
  --mist: #A9BFB8;
  --glass: rgba(47, 243, 214, .08);
  --chalk: #F2F7F5;
  --line: rgba(21, 68, 60, .92);

  --shell: 1320px;
  --gutter: clamp(18px, 4vw, 56px);

  --font-display: "Barlow Condensed", "Oswald", "DIN Alternate", "Roboto Condensed", "Arial Narrow", system-ui, sans-serif;
  --font-head: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-meta: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: clip;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(900px 520px at 78% -8%, rgba(47, 243, 214, .10), transparent 62%),
    radial-gradient(680px 460px at 6% 14%, rgba(255, 138, 61, .07), transparent 60%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(16px, 1.05vw, 18px);
  line-height: 1.8;
  letter-spacing: .01em;
}

/* 战术板网格纹理：极低强度的球场线 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(21, 68, 60, .22) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(21, 68, 60, .16) 0 1px, transparent 1px 96px);
  opacity: .5;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--paper);
}

p { font-family: var(--font-body); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

#main-content { scroll-margin-top: 160px; position: relative; z-index: 1; }

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

/* ---------- 4. 跳至正文 ---------- */
.skip-link {
  position: fixed;
  left: 50%;
  top: -120px;
  transform: translateX(-50%);
  z-index: 120;
  padding: 12px 24px;
  background: var(--cyan);
  color: #04211C;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .04em;
  border-radius: 0 0 4px 4px;
  transition: top .22s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 5. 页头 · 居中刊头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  isolation: isolate;
  background: linear-gradient(180deg, #08251F 0%, #06201C 100%);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s var(--ease);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(760px 260px at 50% -45%, rgba(47, 243, 214, .20), transparent 70%);
}
.site-header.is-condensed {
  box-shadow: 0 14px 34px -18px rgba(0, 0, 0, .85);
}

.masthead {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(22px, 4vw, 46px) var(--gutter) clamp(16px, 2.4vw, 26px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(6px, 1vw, 12px);
  text-align: center;
  transition: padding .34s var(--ease);
}

.masthead__eyebrow {
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .34em;
  text-indent: .34em;
  color: var(--cyan-deep);
}

.brand {
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(6px, 1vw, 16px);
}
.brand__mark {
  position: relative;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(40px, 6.8vw, 84px);
  line-height: .94;
  letter-spacing: -.02em;
  color: var(--paper);
  transition: font-size .34s var(--ease);
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: .06em;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--cyan) 22%, var(--cyan) 78%, transparent);
  opacity: .55;
}
.brand__name {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 40px);
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--mist);
  transition: font-size .34s var(--ease);
}

.masthead__tagline {
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}
.masthead__cta { margin-top: 4px; }

/* 收缩态 */
.site-header.is-condensed .masthead {
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding-top: 10px;
  padding-bottom: 8px;
}
.site-header.is-condensed .brand__mark { font-size: clamp(22px, 3vw, 32px); }
.site-header.is-condensed .brand__mark::after { opacity: .3; }
.site-header.is-condensed .brand__name { font-size: 16px; letter-spacing: .12em; }
.site-header.is-condensed .masthead__eyebrow,
.site-header.is-condensed .masthead__tagline,
.site-header.is-condensed .masthead__cta { display: none; }

/* ---------- 6. 页头 · 赛程轴导航 ---------- */
.axis-wrap {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(8px, 1.6vw, 24px);
  border-top: 1px solid var(--line);
}

.axis {
  position: relative;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: grab;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 24px, #000 calc(100% - 24px), transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 24px, #000 calc(100% - 24px), transparent 100%);
}
.axis::-webkit-scrollbar { display: none; }
.axis.is-dragging { cursor: grabbing; }

.axis__track {
  display: flex;
  align-items: stretch;
  min-width: max-content;
}
.axis__node {
  display: flex;
  align-items: stretch;
  position: relative;
}
.axis__node + .axis__node::before {
  content: "";
  align-self: center;
  width: 1px;
  height: 16px;
  background: var(--ink-700);
  margin: 0 2px;
}

.axis__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: .55em;
  padding: 16px clamp(10px, 1.5vw, 20px);
  color: var(--mist);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  white-space: nowrap;
  transition: color .28s var(--ease);
}
.axis__tick {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--mist);
  opacity: .45;
  transition: opacity .28s var(--ease), color .28s var(--ease);
}
.axis__link::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 50% 100%;
  opacity: 0;
  transition: transform .32s var(--ease), opacity .32s var(--ease);
}
.axis__link:hover,
.axis__link:focus-visible { color: var(--paper); }
.axis__link:hover .axis__tick { opacity: .9; }
.axis__link:hover::after { transform: scaleX(1); opacity: .4; }

.axis__link[aria-current="page"] { color: var(--cyan); }
.axis__link[aria-current="page"]::after {
  transform: scaleX(1);
  opacity: 1;
  box-shadow: 0 0 14px rgba(47, 243, 214, .6);
}
.axis__link[aria-current="page"] .axis__tick {
  color: var(--orange);
  opacity: 1;
}

/* 当前轮次锚点 */
.round-pin {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  padding: 10px 0 10px 18px;
  border-left: 1px solid var(--line);
  transition: color .25s var(--ease);
}
.round-pin__label {
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .18em;
  color: var(--mist);
}
.round-pin__value {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--cyan);
  transition: color .25s var(--ease), text-shadow .25s var(--ease);
}
.round-pin:hover .round-pin__value,
.round-pin:focus-visible .round-pin__value {
  color: var(--orange);
  text-shadow: 0 0 16px rgba(255, 138, 61, .55);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .1em;
  color: var(--paper);
}
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 22px;
  height: 12px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--cyan);
  transition: transform .3s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle__text { color: var(--mist); }

.site-header[data-open] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }
.site-header[data-open] .nav-toggle__text { color: var(--cyan); }

/* 滚动进度 */
.scroll-meter {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan) 55%, var(--orange));
  box-shadow: 0 0 12px rgba(47, 243, 214, .45);
  pointer-events: none;
  z-index: 3;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(48px, 9vw, 120px);
  background: linear-gradient(180deg, var(--ink-800), #041714 84%);
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(620px 240px at 12% 0%, rgba(47, 243, 214, .10), transparent 66%);
}

.footer__grid {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(34px, 6vw, 72px) var(--gutter) clamp(20px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(24px, 4vw, 60px);
}

.footer__sign {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: -.01em;
  color: var(--paper);
}
.footer__line {
  margin-top: 10px;
  font-size: 16px;
  color: var(--paper);
}
.footer__meta {
  margin-top: 8px;
  font-family: var(--font-meta);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.footer__nav-title {
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .26em;
  color: var(--cyan-deep);
  margin-bottom: 14px;
}
.footer__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__list a {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}
.footer__list a:hover,
.footer__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.footer__value {
  font-family: var(--font-meta);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  word-break: break-word;
}

.footer__base {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(18px, 3vw, 30px);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid rgba(21, 68, 60, .6);
  padding-top: clamp(16px, 2vw, 22px);
}
.footer__copy {
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--mist);
}
.footer__icp {
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .14em;
  color: var(--paper);
  opacity: .1;
}

/* ---------- 8. 通用按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .6em;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  overflow: hidden;
  transition: background .26s var(--ease), color .26s var(--ease),
              border-color .26s var(--ease), box-shadow .26s var(--ease);
}
.btn--solid { background: var(--cyan); color: #04211C; }
.btn--solid:hover,
.btn--solid:focus-visible { background: #63F8E2; box-shadow: 0 0 22px rgba(47, 243, 214, .35); }

.btn--ghost { border-color: var(--ink-700); color: var(--paper); }
.btn--ghost:hover,
.btn--ghost:focus-visible { border-color: var(--cyan); color: var(--cyan); }

.btn--accent { background: var(--orange); color: #2A1004; }
.btn--accent:hover,
.btn--accent:focus-visible { background: var(--orange-soft); }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--mist);
}
.breadcrumb a {
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}
.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--cyan); border-bottom-color: var(--cyan); }
.breadcrumb__sep { color: var(--ink-700); }

/* ---------- 10. 结构容器 ---------- */
.wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}
.col-main { grid-column: 1 / span 7; min-width: 0; }
.col-side { grid-column: 9 / span 4; min-width: 0; }

.section {
  position: relative;
  padding: clamp(40px, 7vw, 96px) 0;
}
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: clamp(12px, 2.4vw, 28px);
  margin-bottom: clamp(20px, 3vw, 40px);
}
.section__index {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(56px, 9vw, 132px);
  line-height: .8;
  letter-spacing: -.03em;
  color: rgba(47, 243, 214, .22);
}
@supports (-webkit-text-stroke: 1px #000) {
  .section__index {
    color: transparent;
    -webkit-text-stroke: 1px rgba(47, 243, 214, .42);
  }
}
.section__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 44px);
  letter-spacing: -.01em;
  color: var(--paper);
}
.section__note {
  flex: 1 1 240px;
  font-family: var(--font-meta);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.prose { max-width: 38em; }
.prose > * + * { margin-top: 1.1em; }
.prose p { font-family: var(--font-body); color: var(--paper); }
.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(47, 243, 214, .45);
  transition: border-color .24s var(--ease);
}
.prose a:hover { border-bottom-color: var(--cyan); }
.prose strong { color: var(--cyan); font-weight: 700; }
.prose ul { display: flex; flex-direction: column; gap: .6em; }
.prose li { padding-left: 1.4em; position: relative; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0; top: .72em;
  width: 8px; height: 2px;
  background: var(--orange);
}

/* ---------- 11. 面板与数据 ---------- */
.panel {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: 2px;
  padding: clamp(18px, 2.6vw, 34px);
}
.panel--glass {
  background: var(--glass);
  border-color: rgba(47, 243, 214, .22);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.panel--chalk {
  background: var(--chalk);
  border-color: transparent;
  color: #0A211D;
}
.panel--chalk .panel__cap { color: var(--cyan-deep); }
.panel--slice {
  -webkit-clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
}
.panel__cap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .2em;
  color: var(--cyan-deep);
}
.panel__body { margin-top: 14px; }

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(48px, 7vw, 104px);
  line-height: .86;
  letter-spacing: -.02em;
  color: var(--cyan);
}
.stat__unit {
  font-family: var(--font-display);
  font-size: .32em;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--mist);
  margin-left: .3em;
}
.stat__label {
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .22em;
  color: var(--mist);
}

/* ---------- 12. 标签筛选 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: 8px 16px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--mist);
  transition: border-color .24s var(--ease), color .24s var(--ease),
              background .24s var(--ease);
}
.chip:hover,
.chip:focus-visible { border-color: var(--cyan); color: var(--paper); }
.chip[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04211C;
}

/* ---------- 13. 分段切换 ---------- */
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--line);
}
.tabs__btn {
  position: relative;
  padding: 14px 20px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--mist);
  transition: color .26s var(--ease);
}
.tabs__btn::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: -1px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transition: transform .3s var(--ease);
}
.tabs__btn:hover { color: var(--paper); }
.tabs__btn[aria-selected="true"] { color: var(--cyan); }
.tabs__btn[aria-selected="true"]::after { transform: scaleX(1); }
.tabs__panel { padding-top: clamp(18px, 3vw, 32px); }
.tabs__panel[hidden] { display: none; }

/* ---------- 14. 手风琴 ---------- */
.accordion { border-top: 1px solid var(--line); }
.accordion__item { border-bottom: 1px solid var(--line); }
.accordion__btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  text-align: left;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
  transition: color .24s var(--ease);
}
.accordion__btn::after {
  content: "";
  flex: none;
  width: 10px; height: 10px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .3s var(--ease);
}
.accordion__btn:hover { color: var(--cyan); }
.accordion__btn[aria-expanded="true"]::after { transform: rotate(-135deg); }
.accordion__panel {
  padding: 0 0 22px;
  max-width: 38em;
  color: var(--mist);
}
.accordion__panel[hidden] { display: none; }

/* ---------- 15. 时间线 ---------- */
.timeline {
  position: relative;
  padding-left: 30px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(15, 185, 166, .12));
}
.timeline__item {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 36px);
}
.timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: .55em;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
}
.timeline__item:last-child { padding-bottom: 0; }
.timeline__mark {
  display: block;
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: .18em;
  color: var(--orange);
  margin-bottom: 4px;
}

/* ---------- 16. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: 2px;
  aspect-ratio: 16 / 9;
}
.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame__cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(6, 32, 28, 0), rgba(6, 32, 28, .88));
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--mist);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--slice {
  -webkit-clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
}

/* ---------- 17. 显现与回响 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.echo-ripple {
  position: fixed;
  width: 260px;
  height: 260px;
  margin: -130px 0 0 -130px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 200;
  background: radial-gradient(circle, rgba(255, 138, 61, .42), rgba(255, 138, 61, 0) 66%);
  animation: echoRipple 320ms ease-out forwards;
}
@keyframes echoRipple {
  0%   { opacity: .35; transform: scale(.1); }
  100% { opacity: 0;   transform: scale(1); }
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1024px) {
  .col-main,
  .col-side { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .site-header { position: sticky; }

  .axis-wrap {
    grid-template-columns: 1fr auto;
    gap: 0 16px;
    padding-top: 4px;
    padding-bottom: 4px;
  }

  .nav-toggle { display: inline-flex; }

  .round-pin {
    border-left: 0;
    padding-left: 0;
    flex-direction: row;
    align-items: baseline;
    gap: 8px;
  }
  .round-pin__value { font-size: 20px; }

  .axis {
    grid-column: 1 / -1;
    display: none;
    overflow: visible;
    cursor: auto;
    -webkit-mask-image: none;
    mask-image: none;
  }
  .site-header[data-open] .axis {
    display: block;
    padding-bottom: 14px;
  }

  .axis__track {
    flex-direction: column;
    min-width: 0;
    width: 100%;
  }
  .axis__node + .axis__node::before { display: none; }
  .axis__link {
    width: 100%;
    justify-content: space-between;
    padding: 14px 2px;
    border-bottom: 1px solid rgba(21, 68, 60, .55);
  }
  .axis__tick { order: 2; }
  .axis__link::after { left: 0; right: 0; }

  .site-header.is-condensed .masthead__eyebrow,
  .site-header.is-condensed .masthead__tagline,
  .site-header.is-condensed .masthead__cta { display: none; }
}

@media (max-width: 720px) {
  .footer__grid { grid-template-columns: 1fr; }
  .footer__base { flex-direction: column; align-items: flex-start; }
  .section__head { flex-direction: column; align-items: flex-start; gap: 10px; }
}

@media (max-width: 560px) {
  .masthead { padding-top: 20px; }
  .brand { flex-direction: column; align-items: center; gap: 2px; }
  .brand__name { letter-spacing: .18em; }
  .btn { padding: 12px 20px; }
}

/* ---------- 19. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .echo-ripple { display: none; }
  .axis { scroll-behavior: auto; }
}