/* =========================================================
   星空体育 · 全站共享样式 /assets/site.css
   深空黑 + 电光青 · 蓝图网格 · 展签式组件
   ========================================================= */

/* ---------- 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, blockquote, dl, dd { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

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

a { color: inherit; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink-950: #05070C;
  --ink-900: #0B1119;
  --grid-line: #16222E;
  --grid-soft: rgba(22, 34, 46, 0.62);

  --cyan: #35E6D6;
  --cyan-dim: #159C93;
  --cyan-mist: #7FE9E0;
  --orange: #FF7A2F;
  --violet: #8A6BFF;
  --violet-dim: #5B44C7;
  --green: #3BD08A;

  --text: #E8EFF4;
  --text-dim: #9BA9B6;
  --text-faint: #6C7B89;

  --header-h: 64px;
  --wrap: 1320px;
  --gut: clamp(16px, 4vw, 40px);
  --t: 150ms;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Menlo, Consolas, "DejaVu Sans Mono",
    "Liberation Mono", "Courier New", monospace;
}

/* ---------- 3. Base ---------- */
body {
  padding-top: var(--header-h);
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  background-color: var(--ink-950);
  background-image:
    radial-gradient(120% 70% at 8% -12%, rgba(53, 230, 214, 0.09), transparent 58%),
    radial-gradient(90% 55% at 100% 0%, rgba(138, 107, 255, 0.09), transparent 62%),
    repeating-linear-gradient(90deg, var(--grid-soft) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, var(--grid-soft) 0 1px, transparent 1px 72px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: rgba(53, 230, 214, 0.28); color: #ffffff; }

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

#main-content { scroll-margin-top: calc(var(--header-h) + 16px); }

/* ---------- 4. 排版 ---------- */
.display {
  font-weight: 800;
  font-stretch: 87.5%;
  font-size: clamp(2.1rem, 5.6vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: 0.06em;
}

.display--tight { line-height: 0.98; letter-spacing: 0.04em; }

.h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.06em;
}

.h3 {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.05em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--cyan-dim);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan-dim);
}

.lede {
  max-width: 42ch;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.8;
  color: var(--text-dim);
}

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

.text-dim { color: var(--text-dim); }

.flow > * + * { margin-top: var(--flow-gap, 16px); }

/* ---------- 5. 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.wrap--wide { max-width: 1520px; }
.wrap--narrow { max-width: 880px; }

.section { padding-block: clamp(48px, 7vw, 104px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px); }

.blueprint {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 28px);
}

.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-12 { grid-column: span 12; }

.start-6 { grid-column-start: 6; }
.start-7 { grid-column-start: 7; }

/* ---------- 6. 按钮 / 标签 / 小件 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid var(--grid-line);
  background: rgba(255, 255, 255, 0.015);
  color: var(--text);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-decoration: none;
  cursor: pointer;
  transition: border-color var(--t) linear, background-color var(--t) linear,
    color var(--t) linear;
}

.btn::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--cyan);
  transition: width var(--t) linear;
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--cyan-dim);
  background: rgba(53, 230, 214, 0.07);
  color: #ffffff;
}

.btn:hover::after,
.btn:focus-visible::after { width: 100%; }

.btn--signal {
  border-color: rgba(255, 122, 47, 0.5);
  color: #FFD9C2;
}

.btn--signal:hover,
.btn--signal:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 122, 47, 0.12);
  color: #ffffff;
}

.btn--signal::after { background: var(--orange); }

.btn--solid {
  border-color: var(--orange);
  background: var(--orange);
  color: #12060A;
  font-weight: 600;
}

.btn--solid:hover,
.btn--solid:focus-visible {
  border-color: #FF9257;
  background: #FF9257;
  color: #12060A;
}

.btn--solid::after { background: transparent; }

.btn--ghost {
  border-color: transparent;
  background: none;
  padding-inline: 0;
  color: var(--cyan-mist);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: none;
  color: #ffffff;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--grid-line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.tag--cyan { border-color: rgba(53, 230, 214, 0.4); color: var(--cyan-mist); }
.tag--violet { border-color: rgba(138, 107, 255, 0.45); color: #C3B4FF; }
.tag--orange { border-color: rgba(255, 122, 47, 0.5); color: #FFB98C; }
.tag--green { border-color: rgba(59, 208, 138, 0.45); color: #8CE9BE; }

.rule {
  width: 100%;
  height: 1px;
  border: 0;
  background: var(--grid-line);
}

.rule--tick {
  height: 9px;
  background-color: transparent;
  background-image: repeating-linear-gradient(
    90deg,
    var(--grid-line) 0 1px,
    transparent 1px 12px
  );
}

.plate {
  position: relative;
  padding: 16px 18px;
  border: 1px solid var(--grid-line);
  background: var(--ink-900);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.plate__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan-dim);
}

.plate__value {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  line-height: 1.1;
  color: var(--text);
}

.panel {
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--grid-line);
  background: linear-gradient(180deg, rgba(11, 17, 25, 0.92), rgba(5, 7, 12, 0.92));
}

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--grid-line);
}

.panel__title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.index-list { border-top: 1px solid var(--grid-line); }

.index-list__item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--grid-line);
  transition: background-color var(--t) linear;
}

.index-list__item:hover { background: rgba(53, 230, 214, 0.05); }

.index-list__idx {
  min-width: 38px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-dim);
}

.index-list__body { flex: 1 1 auto; min-width: 0; }

.stat { display: flex; flex-direction: column; gap: 8px; }

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1;
  color: var(--cyan);
}

.stat__label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
}

.crumbs__item a { color: var(--text-dim); text-decoration: none; }
.crumbs__item a:hover { color: var(--cyan); }
.crumbs__sep { color: var(--text-faint); }

/* ---------- 7. 图片容器 ---------- */
.figure {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--grid-line);
  background: var(--ink-900);
  aspect-ratio: 16 / 9;
}

.figure img,
.figure video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure--wide { aspect-ratio: 21 / 9; }
.figure--band { aspect-ratio: 32 / 9; }
.figure--square { aspect-ratio: 1 / 1; }
.figure--tall { aspect-ratio: 3 / 4; }

.figure__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(53, 230, 214, 0.1), transparent 45%),
    radial-gradient(60% 40% at 100% 0%, rgba(138, 107, 255, 0.18), transparent 70%);
}

.figure__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(22, 34, 46, 0.7) 0 1px,
    transparent 1px 40px
  );
  opacity: 0.55;
}

.figure__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  border-top: 1px solid var(--grid-line);
  background: linear-gradient(180deg, transparent, rgba(5, 7, 12, 0.9));
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

/* ---------- 8. 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 420ms linear, transform 420ms linear;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* =========================================================
   9. 页头 · 命令栏
   ========================================================= */
.skip-link {
  position: absolute;
  left: 12px;
  top: 8px;
  z-index: 80;
  padding: 10px 18px;
  background: var(--cyan);
  color: #04120F;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--t) linear;
}

.skip-link:focus { transform: translateY(0); }

.sky-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  height: var(--header-h);
  background: rgba(5, 7, 12, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--grid-line);
  transition: height var(--t) linear, background-color var(--t) linear;
}

.sky-header[data-compact] {
  height: 52px;
  background: rgba(5, 7, 12, 0.96);
}

.sky-header__shell {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  height: 100%;
  max-width: 1520px;
  margin-inline: auto;
  padding-inline: clamp(14px, 3vw, 32px);
}

.sky-header__meter {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 62%, var(--orange));
  opacity: 0.9;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--text);
}

.brand__mark {
  width: 11px;
  height: 11px;
  background: var(--cyan);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  filter: drop-shadow(0 0 7px rgba(53, 230, 214, 0.7));
}

.brand__text {
  display: flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
}

.brand__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.brand__rule {
  width: 1px;
  height: 13px;
  background: var(--grid-line);
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.3em;
  color: var(--cyan-mist);
}

/* 导航 */
.sky-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}

.sky-nav__list {
  display: flex;
  align-items: stretch;
  height: 100%;
}

.sky-nav__item { display: flex; }

.sky-nav__item + .sky-nav__item { border-left: 1px solid var(--grid-line); }

.sky-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  height: 100%;
  padding-inline: clamp(8px, 1.1vw, 16px);
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t) linear, background-color var(--t) linear;
}

.sky-nav__link:hover,
.sky-nav__link:focus-visible {
  color: var(--text);
  background: rgba(53, 230, 214, 0.05);
}

.sky-nav__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0;
  color: var(--cyan-dim);
}

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

.sky-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
}

/* 状态灯 */
.sky-status { position: relative; flex: 0 0 auto; }

.sky-status__btn {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--grid-line);
  color: var(--text-dim);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color var(--t) linear, color var(--t) linear;
}

.sky-status__btn:hover,
.sky-status__btn[aria-expanded="true"] {
  border-color: var(--cyan-dim);
  color: var(--text);
}

.sky-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  flex: 0 0 auto;
  animation: sky-pulse 2.6s linear infinite;
}

@keyframes sky-pulse {
  0% { box-shadow: 0 0 0 0 rgba(59, 208, 138, 0.45); }
  70% { box-shadow: 0 0 0 6px rgba(59, 208, 138, 0); }
  100% { box-shadow: 0 0 0 0 rgba(59, 208, 138, 0); }
}

.sky-status__text { white-space: nowrap; }

.sky-status__panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(320px, 86vw);
  padding: 16px 18px;
  border: 1px solid var(--grid-line);
  background: var(--ink-900);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.55);
}

.sky-status__panel[hidden] { display: none; }

.sky-status__title {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan-dim);
}

.sky-status__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

.sky-status__list .mono {
  margin-right: 8px;
  font-size: 11px;
  color: var(--cyan-mist);
}

/* 移动索引按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid var(--grid-line);
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color var(--t) linear, color var(--t) linear;
}

.nav-toggle:hover,
.nav-toggle[aria-expanded="true"] {
  border-color: var(--cyan-dim);
  color: var(--text);
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 18px;
}

.nav-toggle__bars i {
  display: block;
  width: 100%;
  height: 1.5px;
  background: currentColor;
}

/* =========================================================
   10. 页脚 · 星图三段
   ========================================================= */
.sky-footer {
  position: relative;
  margin-top: clamp(60px, 9vw, 140px);
  border-top: 1px solid var(--grid-line);
  background-color: var(--ink-900);
  background-image: linear-gradient(
    180deg,
    rgba(11, 17, 25, 0.2) 0%,
    rgba(11, 17, 25, 0.85) 45%,
    rgba(5, 7, 12, 0.6) 100%
  );
}

.sky-footer__top { padding-block: clamp(36px, 5vw, 64px) 0; }

.sky-footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 44px);
}

.fgroup__title {
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--grid-line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan-dim);
}

.fgroup__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fgroup__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--t) linear;
}

.fgroup__link::before {
  content: "";
  width: 10px;
  height: 1px;
  background: var(--grid-line);
  transition: width var(--t) linear, background-color var(--t) linear;
}

.fgroup__link:hover { color: var(--text); }

.fgroup__link:hover::before {
  width: 18px;
  background: var(--cyan);
}

.sky-footer__contact {
  margin-top: clamp(32px, 4vw, 56px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--grid-line);
}

.fcontact {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(16px, 3vw, 40px);
  align-items: start;
}

.fcontact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan-dim);
}

.fcontact__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fcontact__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
}

.fcontact__key {
  min-width: 72px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-faint);
}

.fcontact__val {
  font-size: 14px;
  color: var(--text);
  word-break: break-word;
}

.fcontact__aside { min-width: 0; }

.fcontact__note {
  margin-bottom: 18px;
  max-width: 44ch;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.fcontact__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sky-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 26px;
  margin-top: clamp(28px, 4vw, 48px);
  padding-top: 18px;
  border-top: 1px solid var(--grid-line);
}

.sky-footer__copy {
  font-size: 12.5px;
  color: var(--text-dim);
}

.sky-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
}

.sky-footer__legal a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t) linear, border-color var(--t) linear;
}

.sky-footer__legal a:hover {
  color: var(--cyan-mist);
  border-bottom-color: var(--cyan-dim);
}

.sky-footer__sep { color: var(--text-faint); }

.sky-footer__icp {
  font-size: 12px;
  color: var(--text-faint);
}

.sky-footer__trail {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: 1520px;
  height: 46px;
  margin-inline: auto;
  padding-inline: var(--gut);
}

.sky-footer__trail-line {
  position: relative;
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(53, 230, 214, 0.55) 22%,
    rgba(138, 107, 255, 0.5) 62%,
    rgba(53, 230, 214, 0.14)
  );
}

.sky-footer__trail-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(127, 233, 224, 0.9) 1px, transparent 1.6px);
  background-size: 36px 100%;
  background-repeat: repeat-x;
  opacity: 0.5;
}

.sky-footer__trail-word {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.34em;
  color: var(--cyan-dim);
}

/* =========================================================
   11. 响应式
   ========================================================= */
@media (max-width: 1180px) {
  .sky-status__text { display: none; }
  .sky-status__btn { padding: 8px 10px; }
}

@media (max-width: 1040px) {
  .nav-toggle { display: inline-flex; }

  .sky-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: block;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 6px 0 20px;
    background: rgba(5, 7, 12, 0.98);
    border-bottom: 1px solid var(--grid-line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity var(--t) linear, transform var(--t) linear,
      visibility var(--t) linear;
  }

  .sky-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .sky-nav__list {
    display: block;
    height: auto;
  }

  .sky-nav__item { display: block; }

  .sky-nav__item + .sky-nav__item {
    border-left: 0;
    border-top: 1px solid var(--grid-line);
  }

  .sky-nav__link {
    height: auto;
    padding: 15px clamp(16px, 5vw, 28px);
    gap: 16px;
    font-size: 15px;
  }

  .sky-nav__idx { font-size: 11px; letter-spacing: 0.1em; }

  .sky-nav__link[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 0;
    bottom: 0;
    width: 2px;
    height: auto;
  }

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

  .fcontact { grid-template-columns: minmax(0, 1fr); gap: 18px; }
}

@media (max-width: 900px) {
  .blueprint { grid-template-columns: repeat(6, minmax(0, 1fr)); }

  .span-3, .span-4, .span-5, .span-6,
  .span-7, .span-8, .span-9, .span-12 { grid-column: span 6; }

  .start-6, .start-7 { grid-column-start: auto; }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }

  .figure { aspect-ratio: 4 / 3; }
  .figure--wide { aspect-ratio: 16 / 9; }
  .figure--band { aspect-ratio: 16 / 9; }
  .figure--tall { aspect-ratio: 4 / 5; }

  .sky-footer__grid { grid-template-columns: minmax(0, 1fr); }

  .sky-footer__base { flex-direction: column; align-items: flex-start; }

  .brand__tag { display: none; }
}

@media (max-width: 460px) {
  .brand__name { font-size: 14px; letter-spacing: 0.08em; }
  .nav-toggle__label { display: none; }
}

/* ---------- 12. 减弱动效 ---------- */
@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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}