/* ========== 星空竞技 Site Kit ========== */

/* ---------- 变量 ---------- */
:root {
  --space-blue: #0B1A3A;
  --space-blue-dark: #081126;
  --space-blue-light: #1B2A4A;
  --star-gold: #F5B82E;
  --aurora: #00FF87;
  --cream: #F7F1E0;
  --ink: #2B1E0E;
  --signal: #E74C3C;
  --nebula: #A0AAB5;
  --star-white: #FFFFFF;
  --font-display: 'Orbitron', 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --header-h: 72px;
  --radius-card: 20px;
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.3);
  --shadow-gold: 0 6px 20px rgba(245, 184, 46, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--star-white);
  background:
    radial-gradient(ellipse at 80% 15%, rgba(245, 184, 46, 0.1), transparent 55%),
    radial-gradient(ellipse at 18% 85%, rgba(0, 255, 135, 0.07), transparent 50%),
    var(--space-blue);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 22% 28%, rgba(255, 255, 255, 0.7), transparent 100%),
    radial-gradient(1px 1px at 42% 66%, rgba(255, 255, 255, 0.5), transparent 100%),
    radial-gradient(1.5px 1.5px at 62% 22%, rgba(245, 184, 46, 0.65), transparent 100%),
    radial-gradient(1px 1px at 78% 52%, rgba(255, 255, 255, 0.55), transparent 100%),
    radial-gradient(1px 1px at 88% 78%, rgba(0, 255, 135, 0.5), transparent 100%),
    radial-gradient(1.5px 1.5px at 12% 76%, rgba(255, 255, 255, 0.5), transparent 100%),
    radial-gradient(1px 1px at 70% 92%, rgba(255, 255, 255, 0.35), transparent 100%);
  background-size: 380px 380px;
  background-repeat: repeat;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.3;
  text-wrap: balance;
}

p {
  margin-top: 0;
}

a {
  color: var(--star-gold);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  padding-left: 1.4rem;
}

main {
  flex: 1;
  position: relative;
  z-index: 1;
}

main[id="main-content"] {
  scroll-margin-top: var(--header-h);
}

.site-header,
.site-footer {
  position: relative;
  z-index: 2;
}

/* ---------- 布局工具 ---------- */
.container {
  width: min(1200px, 100% - 3rem);
  margin-inline: auto;
}

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

.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  z-index: 300;
  transform: translateY(-120%);
  background: var(--star-gold);
  color: var(--ink);
  font-weight: 700;
  padding: 0.7rem 1.2rem;
  border-radius: 0 0 10px 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: transform 0.25s ease;
}

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

.page-body {
  padding: calc(var(--header-h) + 3.5rem) 0 4rem;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

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

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: linear-gradient(135deg, var(--star-gold), #FAD761);
  color: var(--ink);
}

.btn--primary:hover {
  box-shadow: var(--shadow-gold);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.07);
  color: var(--star-white);
  border-color: rgba(255, 255, 255, 0.35);
}

.btn--ghost:hover {
  background: rgba(245, 184, 46, 0.12);
  border-color: var(--star-gold);
  color: var(--star-gold);
}

.btn--signal {
  background: var(--signal);
  color: #fff;
}

.btn--signal:hover {
  background: #C0392B;
  box-shadow: 0 6px 18px rgba(231, 76, 60, 0.35);
}

/* ---------- 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(11, 26, 58, 0.55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition:
    background-color 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}

.site-header.is-scrolled {
  background: var(--space-blue);
  border-bottom-color: rgba(245, 184, 46, 0.35);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: var(--header-h);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* 品牌标志 */
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--star-white);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo:hover {
  text-decoration: none;
}

.site-logo__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.35), transparent 55%),
    var(--space-blue-light);
  border: 1px solid rgba(245, 184, 46, 0.55);
}

.site-logo__mark::before {
  content: "";
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--star-gold);
  border-right-color: var(--aurora);
  animation: orbit-spin 9s linear infinite;
  opacity: 0.85;
}

.site-logo__core {
  width: 18px;
  height: 18px;
  background: linear-gradient(135deg, var(--star-gold), #FFD966);
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

@keyframes orbit-spin {
  to { transform: rotate(360deg); }
}

.site-logo__text {
  display: grid;
  gap: 0.05rem;
}

.site-logo__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.site-logo__tag {
  font-family: var(--font-display);
  font-size: 0.58rem;
  letter-spacing: 0.32em;
  color: var(--star-gold);
  text-transform: uppercase;
}

.site-logo--footer {
  margin-bottom: 1rem;
}

/* 主导航 */
.nav__list {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__item {
  list-style: none;
  margin: 0;
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease, background-color 0.2s ease;
  text-decoration: none;
}

.nav__link:hover {
  color: var(--star-gold);
  background: rgba(245, 184, 46, 0.1);
  text-decoration: none;
}

.nav__link[aria-current="page"] {
  color: var(--star-gold);
  font-weight: 700;
}

.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 999px;
  background: var(--star-gold);
  box-shadow: 0 0 10px rgba(245, 184, 46, 0.8);
}

.nav-cta {
  margin-left: 0.25rem;
}

/* 移动导航开关 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--star-white);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle:hover {
  border-color: var(--star-gold);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--star-gold);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--space-blue-dark);
  border-top: 1px solid rgba(245, 184, 46, 0.25);
  padding: 4rem 0 0;
  margin-top: 4rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.9fr 1fr 1fr 1.4fr;
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer__brand {
  max-width: 320px;
}

.footer__intro {
  margin: 0 0 1.25rem;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
}

.footer__trust {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  background: rgba(245, 184, 46, 0.08);
  border: 1px solid rgba(245, 184, 46, 0.25);
  font-size: 0.88rem;
  color: var(--star-white);
}

.footer__hotlink {
  color: var(--star-gold);
  font-weight: 700;
  margin: 0 0.15rem;
}

.footer__block {
  min-width: 0;
}

.footer__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--star-gold);
  text-transform: uppercase;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--star-gold), transparent);
}

.footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.footer__list a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.92rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer__list a:hover {
  color: var(--star-gold);
  padding-left: 0.25rem;
  text-decoration: none;
}

.footer__contact {
  display: grid;
  align-content: start;
  gap: 0.1rem;
}

.footer__contact-item {
  margin: 0 0 0.65rem;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
}

.footer__contact-item a {
  color: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(245, 184, 46, 0.35);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer__contact-item a:hover {
  color: var(--star-gold);
  border-color: var(--star-gold);
  text-decoration: none;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.3rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.82rem;
  color: var(--nebula);
}

.footer__copyright,
.footer__icp {
  margin: 0;
}

/* ---------- 内页框景首屏 ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 5rem) 0 4rem;
  overflow: hidden;
  text-align: center;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 760px;
  height: 760px;
  border-radius: 50%;
  border: 1px solid rgba(245, 184, 46, 0.16);
  box-shadow:
    0 0 0 60px rgba(245, 184, 46, 0.03),
    0 0 0 120px rgba(245, 184, 46, 0.02);
  pointer-events: none;
}

.page-hero__content {
  position: relative;
  z-index: 1;
}

.page-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--star-gold);
}

.page-hero__kicker::before,
.page-hero__kicker::after {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--star-gold));
}

.page-hero__kicker::after {
  background: linear-gradient(90deg, var(--star-gold), transparent);
}

.page-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  margin: 1rem 0 0.25rem;
  color: var(--star-white);
  letter-spacing: 0.02em;
}

.page-hero__lead {
  max-width: 640px;
  margin: 1.25rem auto 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.05rem;
}

/* ---------- 展览框景 ---------- */
.star-frame {
  position: relative;
  border: 1px solid rgba(245, 184, 46, 0.3);
  border-radius: 4px;
  padding: 2rem;
}

.star-frame::before,
.star-frame::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  border: 3px solid var(--star-gold);
  pointer-events: none;
}

.star-frame::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
  border-radius: 6px 0 0 0;
}

.star-frame::after {
  bottom: -2px;
  right: -2px;
  border-left: 0;
  border-top: 0;
  border-radius: 0 0 6px 0;
}

/* ---------- 分区与标题 ---------- */
.section {
  position: relative;
  padding: 4rem 0;
}

.section--cream {
  background: var(--cream);
  color: var(--ink);
  border-radius: 48px 48px 0 0;
}

.section__head {
  max-width: 700px;
  margin-bottom: 2.5rem;
}

.section__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--star-gold);
}

.section__kicker::before {
  content: "";
  width: 20px;
  height: 2px;
  background: var(--star-gold);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0.6rem 0 0.8rem;
  color: inherit;
}

.section__title::after {
  content: "";
  display: block;
  width: 64px;
  height: 2px;
  margin-top: 0.7rem;
  background: linear-gradient(90deg, var(--star-gold), transparent);
}

.section__lead {
  font-size: 1rem;
  color: var(--nebula);
  margin-bottom: 0;
}

.section--cream .section__lead {
  color: #5A5245;
}

/* ---------- 网格与卡片 ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

.grid__item {
  min-width: 0;
}

.card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(27, 42, 74, 0.9), rgba(11, 26, 58, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-card);
  padding: 1.8rem;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--star-gold), rgba(245, 184, 46, 0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 184, 46, 0.45);
  box-shadow: var(--shadow-card);
}

.card:hover::before {
  opacity: 1;
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--star-white);
  margin: 0 0 0.6rem;
}

.card__text {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.75);
  margin: 0 0 1rem;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--star-gold);
  font-weight: 600;
  font-size: 0.9rem;
}

.card__link:hover {
  text-decoration: none;
}

.card__link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.card__link:hover::after {
  transform: translateX(3px);
}

.card--cream {
  background: var(--cream);
  color: var(--ink);
  border-color: rgba(43, 30, 14, 0.12);
}

.card--cream .card__title {
  color: var(--ink);
}

.card--cream .card__text {
  color: #4A4237;
}

.card--cream::before {
  background: linear-gradient(90deg, var(--signal), rgba(231, 76, 60, 0.1));
}

/* ---------- 星球数据组件 ---------- */
.orb {
  display: grid;
  place-items: center;
  text-align: center;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.22), transparent 52%),
    var(--space-blue-light);
  border: 2px solid rgba(245, 184, 46, 0.5);
  box-shadow:
    0 0 30px rgba(245, 184, 46, 0.12),
    inset -10px -14px 24px rgba(0, 0, 0, 0.35);
}

.orb__inner {
  display: grid;
  gap: 0.2rem;
}

.orb__figure {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--star-gold);
  line-height: 1.1;
}

.orb__label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 标签与状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--star-white);
  white-space: nowrap;
}

.tag--gold {
  background: rgba(245, 184, 46, 0.12);
  border-color: rgba(245, 184, 46, 0.4);
  color: var(--star-gold);
}

.tag--green {
  background: rgba(0, 255, 135, 0.1);
  border-color: rgba(0, 255, 135, 0.35);
  color: var(--aurora);
}

.tag--signal {
  background: rgba(231, 76, 60, 0.12);
  border-color: rgba(231, 76, 60, 0.4);
  color: #FF8D80;
}

.status-dot {
  display: inline-block;
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--aurora);
  box-shadow: 0 0 10px rgba(0, 255, 135, 0.8);
  animation: status-pulse 2s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(0.78);
    opacity: 0.65;
  }
}

/* ---------- 图片占位 ---------- */
.img-holder {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 16px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at center, rgba(245, 184, 46, 0.08), transparent 65%),
    var(--space-blue-light);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--nebula);
  font-size: 0.85rem;
}

.img-holder img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-holder--wide {
  aspect-ratio: 16 / 9;
}

.img-holder--portrait {
  aspect-ratio: 3 / 4;
}

.img-holder--round {
  border-radius: 50%;
  border: 2px solid rgba(245, 184, 46, 0.4);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  font-size: 0.85rem;
  color: var(--nebula);
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "›";
  color: var(--star-gold);
}

.breadcrumbs a {
  color: rgba(255, 255, 255, 0.8);
}

.breadcrumbs a:hover {
  color: var(--star-gold);
}

.breadcrumbs__item[aria-current="page"] {
  color: var(--star-gold);
}

/* ---------- 正文容器 ---------- */
.content {
  max-width: 760px;
  margin-inline: auto;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
}

.content h2 {
  margin-top: 2.5rem;
}

.content p {
  margin-bottom: 1.5rem;
}

.content a {
  color: var(--star-gold);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.content a:hover {
  color: var(--aurora);
}

/* ---------- 轨道装饰 ---------- */
.orbit-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 3rem 0;
  color: var(--nebula);
}

.orbit-divider::before,
.orbit-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 184, 46, 0.35), transparent);
}

.orbit-divider__dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--star-gold);
  box-shadow: 0 0 12px rgba(245, 184, 46, 0.7);
}

.orbit-ring {
  position: relative;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 1px solid rgba(245, 184, 46, 0.25);
  pointer-events: none;
}

.orbit-ring::before {
  content: "";
  position: absolute;
  top: 18%;
  left: -4%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--star-gold);
  box-shadow: 0 0 12px rgba(245, 184, 46, 0.7);
}

.orbit-ring::after {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  border: 1px dashed rgba(0, 255, 135, 0.3);
}

/* ---------- 滚动进度与返回顶部 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 150;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--star-gold), var(--aurora));
  box-shadow: 0 0 10px rgba(245, 184, 46, 0.5);
  pointer-events: none;
}

.back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(245, 184, 46, 0.55);
  background: rgba(11, 26, 58, 0.9);
  color: var(--star-gold);
  font-size: 1.15rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s, background-color 0.2s ease;
}

.back-top:hover {
  background: var(--space-blue-light);
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer__contact {
    grid-column: span 3;
  }
}

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

  .nav-cta {
    display: none;
  }

  .site-header__inner {
    min-height: 62px;
  }

  .nav {
    position: fixed;
    top: calc(var(--header-h) + 0.5rem);
    left: 1rem;
    right: 1rem;
    z-index: 90;
    margin: 0 auto;
    max-width: 540px;
    padding: 1rem;
    background: rgba(11, 26, 58, 0.98);
    border: 1px solid rgba(245, 184, 46, 0.3);
    border-radius: 18px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  }

  .nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
  }

  .nav__link {
    display: block;
    padding: 0.7rem 1rem;
    border-radius: 10px;
  }

  .nav__link[aria-current="page"]::after {
    left: 1.1rem;
    bottom: 0.45rem;
    width: 12px;
    height: 3px;
    transform: none;
  }
}

@media (max-width: 720px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: 2.2rem;
  }

  .footer__contact {
    grid-column: auto;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .container {
    width: calc(100% - 2rem);
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .page-hero {
    padding-top: calc(var(--header-h) + 3.5rem);
    padding-bottom: 2.5rem;
  }

  .page-hero__title {
    font-size: clamp(1.8rem, 9vw, 2.4rem);
  }

  .page-body {
    padding-top: calc(var(--header-h) + 2.5rem);
  }

  .star-frame {
    padding: 1.25rem;
  }
}

/* ---------- 焦点与动效偏好 ---------- */
:focus-visible {
  outline: 2px solid var(--star-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

@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;
    transition-delay: 0s !important;
  }

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

  .status-dot,
  .site-logo__mark::before {
    animation: none;
  }
}