/* ========== 基础与变量 ========== */
:root {
  color-scheme: dark;
  --color-space: #0B1C3E;
  --color-space-deep: #081226;
  --color-gold: #D4AF37;
  --color-neon: #9B59B6;
  --color-lake: #1ABC9C;
  --color-stone: #4A4A4A;
  --color-cream: #F5F5DC;
  --color-olive: #6B8E23;
  --color-terra: #C4734F;
  --color-white: #FFFFFF;
  --color-deep: #2C3E50;
  --font-display: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", Consolas, "Liberation Mono", "Noto Sans Mono CJK SC", monospace;
  --header-top: 1rem;
  --header-h: 3.75rem;
  --content-max: 1180px;
  --radius-card: 20px;
  --radius-pill: 60px;
  --border-line: rgba(245,245,220,0.09);
  --shadow-1: 0 8px 30px rgba(3,7,18,0.4);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  overflow-x: hidden;
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: rgba(245,245,220,0.88);
  background-color: var(--color-space);
  background-image:
    radial-gradient(circle at 75% 10%, rgba(155,89,182,0.22), transparent 28rem),
    radial-gradient(circle at 15% 85%, rgba(212,175,55,0.10), transparent 24rem),
    linear-gradient(rgba(245,245,220,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,245,220,0.025) 1px, transparent 1px);
  background-size: auto, auto, 32px 32px, 32px 32px;
  background-attachment: fixed;
}

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

a:hover {
  color: var(--color-neon);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  color: var(--color-cream);
  line-height: 1.2;
  text-wrap: balance;
}

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

::selection {
  background: rgba(212,175,55,0.85);
  color: var(--color-space);
}

:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

#main-content {
  scroll-margin-top: 6rem;
}

main {
  display: block;
  min-height: 60vh;
  padding-top: calc(var(--header-top) + var(--header-h) + 1.5rem);
}

.container {
  width: min(var(--content-max), calc(100% - 2rem));
  margin-inline: auto;
}

/* ========== 无障碍跳转 ========== */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 300;
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 0.75rem 0.75rem;
  background: var(--color-gold);
  color: var(--color-space);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* ========== 通用工具 ========== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ========== 悬浮胶囊头部 ========== */
.site-header {
  position: fixed;
  top: var(--header-top);
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding-inline: 1rem;
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  width: min(var(--content-max), 100%);
  padding: 0.45rem 0.6rem 0.45rem 1rem;
  border: 1px solid rgba(212,175,55,0.42);
  border-radius: 60px;
  background: rgba(8,18,38,0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-1);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
  white-space: nowrap;
  color: var(--color-cream);
}

.site-brand:hover {
  color: var(--color-gold);
}

.site-brand__mark {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  border: 1px solid rgba(212,175,55,0.75);
  background: linear-gradient(135deg, rgba(212,175,55,0.25), rgba(155,89,182,0.18));
  color: var(--color-gold);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-brand__text strong {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.site-brand__text small {
  margin-top: 0.15rem;
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(245,245,220,0.58);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 auto;
  gap: 0.1rem;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.82rem;
  border: 1px solid transparent;
  border-radius: 60px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(245,245,220,0.86);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.site-nav__link:hover {
  background: rgba(212,175,55,0.12);
  border-color: rgba(212,175,55,0.45);
  color: var(--color-gold);
  transform: translateY(-1px);
}

.site-nav__link[aria-current="page"] {
  background: linear-gradient(135deg, rgba(212,175,55,0.2), rgba(155,89,182,0.16));
  border-color: rgba(212,175,55,0.72);
  color: var(--color-gold);
  text-shadow: 0 0 12px rgba(212,175,55,0.35);
}

.site-header__search {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid rgba(245,245,220,0.12);
  background: rgba(155,89,182,0.12);
  color: var(--color-cream);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.site-header__search:hover {
  background: rgba(155,89,182,0.26);
  border-color: rgba(212,175,55,0.6);
  color: var(--color-gold);
}

.site-header__search svg {
  width: 1.05rem;
  height: 1.05rem;
  fill: currentColor;
}

.site-nav-toggle {
  display: none;
  flex-shrink: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(212,175,55,0.45);
  border-radius: 50%;
  background: rgba(212,175,55,0.08);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.site-nav-toggle:hover {
  border-color: var(--color-gold);
  background: rgba(212,175,55,0.18);
}

.site-nav-toggle__bar {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin: 2.5px 0;
  border-radius: 2px;
  background: var(--color-gold);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

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

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(2) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========== 移动端导航 ========== */
@media (max-width: 900px) {
  .site-header {
    top: 0.75rem;
  }

  .site-header__inner {
    padding-left: 1rem;
  }

  .site-nav-toggle {
    display: inline-flex;
    margin-left: 0.35rem;
  }

  .site-header__search {
    margin-left: auto;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    margin: 0;
    padding: 0.75rem;
    border: 1px solid rgba(212,175,55,0.45);
    border-radius: 24px;
    background: rgba(6,13,28,0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.55);
  }

  .site-nav[data-open] {
    display: grid;
    gap: 0.25rem;
  }

  .site-nav__link {
    justify-content: flex-start;
    padding: 0.8rem 1rem;
    border-radius: 16px;
  }
}

/* ========== 页脚 ========== */
.site-footer {
  position: relative;
  margin-top: 4rem;
  overflow: hidden;
  border-top: 1px solid rgba(212,175,55,0.28);
  background: rgba(5,12,25,0.94);
}

.site-footer__signal {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 0%, rgba(155,89,182,0.14), transparent 30rem),
    linear-gradient(90deg, rgba(212,175,55,0.05) 1px, transparent 1px);
  background-size: auto, 48px 48px;
}

.site-footer__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2.5rem;
  padding: 3.5rem 0 2.5rem;
}

.site-footer__col--brand {
  padding-right: 1rem;
}

.site-footer__heading {
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.site-footer__desc {
  max-width: 34rem;
  font-size: 0.82rem;
  line-height: 1.9;
  color: rgba(245,245,220,0.7);
}

.site-footer__sync {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1rem;
  font-size: 0.76rem;
  color: var(--color-lake);
  letter-spacing: 0.06em;
}

.status-dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-gold);
}

.status-dot--live {
  background: var(--color-lake);
  box-shadow: 0 0 0 0 rgba(26,188,156,0.6);
  animation: sync-pulse 2s infinite;
}

.status-dot--wait {
  background: var(--color-gold);
  animation: none;
}

.status-dot--halt {
  background: var(--color-neon);
  animation: none;
}

@keyframes sync-pulse {
  70% {
    box-shadow: 0 0 0 8px rgba(26,188,156,0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(26,188,156,0);
  }
}

.site-footer__links {
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.site-footer__links a {
  display: inline-block;
  padding: 0.15rem 0;
  border-bottom: 1px solid transparent;
  font-size: 0.82rem;
  color: rgba(245,245,220,0.75);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-footer__links a:hover {
  border-bottom-color: rgba(212,175,55,0.5);
  color: var(--color-gold);
}

.site-footer__contact {
  margin-top: 1.2rem;
  font-size: 0.76rem;
  line-height: 1.9;
  color: rgba(245,245,220,0.6);
}

.site-footer__bottom {
  position: relative;
  border-top: 1px solid rgba(245,245,220,0.06);
  padding: 1rem 0;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(245,245,220,0.5);
}

/* ========== 通用区块 ========== */
.section {
  padding-block: clamp(3rem, 8vw, 5rem);
}

.section--tight {
  padding-block: 2rem;
}

.section-heading {
  margin-bottom: 0.8rem;
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--color-cream);
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-lake);
}

.section-kicker::before {
  content: "";
  display: block;
  width: 2rem;
  height: 1px;
  background: currentColor;
}

/* ========== 栅格与卡片 ========== */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1.25rem;
}

.card {
  position: relative;
  padding: 1.5rem;
  border: 1px solid rgba(245,245,220,0.08);
  border-radius: var(--radius-card);
  background: rgba(245,245,220,0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(212,175,55,0.5);
  box-shadow: 0 18px 40px rgba(0,0,0,0.35);
}

.card__title {
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  color: var(--color-gold);
}

.card__text {
  font-size: 0.84rem;
  color: rgba(245,245,220,0.72);
}

.card--accent {
  border-top: 2px solid var(--color-neon);
}

/* ========== 标签 ========== */
.tag {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: 0.25rem 0.7rem;
  border: 1px solid rgba(212,175,55,0.4);
  border-radius: 40px;
  background: rgba(212,175,55,0.08);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.tag--sync {
  border-color: rgba(26,188,156,0.45);
  background: rgba(26,188,156,0.08);
  color: var(--color-lake);
}

.tag--maintenance {
  border-color: rgba(196,115,79,0.45);
  background: rgba(196,115,79,0.08);
  color: var(--color-terra);
}

.tag--resolved {
  border-color: rgba(107,142,35,0.45);
  background: rgba(107,142,35,0.08);
  color: var(--color-olive);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border: 1px solid rgba(212,175,55,0.7);
  border-radius: 60px;
  background: transparent;
  color: var(--color-gold);
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: rgba(212,175,55,0.15);
  border-color: var(--color-gold);
  color: var(--color-cream);
  transform: translateY(-1px);
}

.btn--primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--color-gold), var(--color-neon));
  color: var(--color-space);
  box-shadow: 0 6px 20px rgba(155,89,182,0.25);
}

.btn--primary:hover {
  border-color: transparent;
  background: linear-gradient(135deg, #c9a02e, #8e44ad);
  color: var(--color-white);
}

.btn--ghost {
  border-color: rgba(26,188,156,0.6);
  color: var(--color-lake);
}

.btn--ghost:hover {
  background: rgba(26,188,156,0.12);
  border-color: var(--color-lake);
  color: var(--color-lake);
}

.btn--small {
  padding: 0.5rem 1rem;
  font-size: 0.74rem;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.5rem 0 1.25rem;
  list-style: none;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.35rem;
  color: rgba(212,175,55,0.55);
}

.breadcrumb a {
  color: var(--color-gold);
}

.breadcrumb a:hover {
  color: var(--color-neon);
}

.breadcrumb [aria-current="page"] {
  color: rgba(245,245,220,0.65);
}

/* ========== 图片容器基础 ========== */
.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(212,175,55,0.3);
  border-radius: var(--radius-card);
  background:
    linear-gradient(135deg, rgba(11,28,62,0.88), rgba(155,89,182,0.18)),
    repeating-linear-gradient(0deg, transparent 0, transparent 3px, rgba(245,245,220,0.03) 3px, rgba(245,245,220,0.03) 4px);
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-card);
  box-shadow: inset 0 0 0 1px rgba(212,175,55,0.2);
  pointer-events: none;
}

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

.image-frame--portrait {
  aspect-ratio: 3 / 4;
}

.image-frame--square {
  aspect-ratio: 1 / 1;
}

.image-frame--large {
  aspect-ratio: 4 / 3;
}

/* ========== 档案元信息 ========== */
.archive-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-top: 0.8rem;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(245,245,220,0.55);
}

.archive-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.archive-meta span::before {
  content: "▮";
  font-size: 0.58rem;
  color: var(--color-neon);
}

/* ========== 滚动显现 ========== */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .site-footer__col--brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }
}

@media (max-width: 540px) {
  body {
    background-attachment: scroll;
  }

  main {
    padding-top: calc(var(--header-top) + var(--header-h) + 1rem);
  }

  .site-brand__text small {
    display: none;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__legal {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ========== 减少动态偏好 ========== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}