/* ==========================================================================
   娱乐神殿官方 · 共享外壳样式 /assets/site.css
   神殿青铜绿 + 深殿墨黑 + 鎏金高光 + 电光紫点缀
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.25rem);
}

body,
h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, picture, video { max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- tokens ---------- */
:root {
  /* 色彩 */
  --ink: #0A0F0D;
  --ink-deep: #070B0A;
  --bronze-dark: #14251F;
  --bronze: #2F6B57;
  --bronze-lift: #3A8168;
  --moss: #6E8E7F;
  --gold: #D8B45A;
  --mist: #F4F0E4;
  --cyan: #3FA7C4;
  --amber: #E08A34;
  --violet: #7A5AF8;

  --text: rgba(244, 240, 228, 0.88);
  --text-soft: rgba(244, 240, 228, 0.7);
  --text-dim: rgba(169, 188, 177, 0.86);

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, Georgia, "Times New Roman", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 结构 */
  --shell-max: 78rem;
  --gutter: clamp(1.15rem, 4vw, 3rem);
  --header-h: 4.35rem;
  --radius-lg: 1.6rem;
  --radius-md: 1rem;
  --radius-pill: 999px;
  --line: 1px solid rgba(110, 142, 127, 0.26);
  --hair-gold: 1px solid rgba(216, 180, 90, 0.22);
  --shadow-plate: 0 20px 46px -26px rgba(0, 0, 0, 0.92);
  --ease: cubic-bezier(0.22, 0.68, 0.32, 1);
}

/* ---------- 中文排版基底 ---------- */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(120% 80% at 50% -18%, rgba(47, 107, 87, 0.34), transparent 62%),
    radial-gradient(90% 60% at 100% 100%, rgba(122, 90, 248, 0.10), transparent 60%),
    var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: clamp(15px, 0.5vw + 13.6px, 17px);
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main { display: block; flex: 1 0 auto; }
#main-content { scroll-margin-top: calc(var(--header-h) + 1rem); }
#main-content:focus { outline: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--mist);
  line-height: 1.16;
  letter-spacing: 0.01em;
}

strong { color: var(--mist); font-weight: 700; }
small { font-size: 0.8em; }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.9em; }

::selection { background: rgba(216, 180, 90, 0.32); color: var(--mist); }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 跳至内容 ---------- */
.skip-link {
  position: fixed;
  top: 0.65rem;
  left: 0.65rem;
  z-index: 200;
  transform: translateY(-180%);
  padding: 0.7rem 1.15rem;
  border-radius: var(--radius-pill);
  background: var(--gold);
  color: #14100a;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  transition: transform 0.26s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: none; }

/* ==========================================================================
   头部 · 紧凑命令栏
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(10, 15, 13, 0.97), rgba(10, 15, 13, 0.86));
  border-bottom: var(--hair-gold);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--bronze) 0%, var(--gold) 34%, var(--violet) 68%, var(--cyan) 100%);
  opacity: 0.9;
}

.header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--violet) 55%, var(--cyan));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

.header__bar {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(0.7rem, 1.6vw, 1.6rem);
  position: relative;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: none;
  padding: 0.35rem 0;
}

.brand__sigil,
.footer__sigil {
  position: relative;
  display: block;
  flex: none;
  border-radius: 1.15rem 1.15rem 0.32rem 0.32rem;
  border: 1px solid rgba(216, 180, 90, 0.5);
  background:
    linear-gradient(180deg, rgba(47, 107, 87, 0.62), rgba(10, 15, 13, 0.22));
  box-shadow: inset 0 0 0 3px rgba(10, 15, 13, 0.5);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.brand__sigil { width: 1.95rem; height: 2.35rem; }
.footer__sigil { width: 2.55rem; height: 3.05rem; }

.brand__sigil::before,
.footer__sigil::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 26%;
  transform: translateX(-50%);
  width: 0.26rem;
  bottom: 20%;
  border-radius: 0.13rem;
  background: linear-gradient(180deg, var(--gold), rgba(216, 180, 90, 0));
}

.brand:hover .brand__sigil,
.brand:focus-visible .brand__sigil {
  border-color: var(--gold);
  box-shadow: inset 0 0 0 3px rgba(10, 15, 13, 0.5), 0 0 0 4px rgba(216, 180, 90, 0.12);
}

.brand__text { display: flex; flex-direction: column; line-height: 1.3; }

.brand__label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.brand__descriptor {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--moss);
  white-space: nowrap;
}

/* 版本胶囊 */
.header__note {
  margin: 0 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.36rem 0.8rem;
  border: var(--line);
  border-radius: var(--radius-pill);
  background: rgba(20, 37, 31, 0.6);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.header__note-dot {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(224, 138, 52, 0.18);
  animation: sigilPulse 3.6s var(--ease) infinite;
}

@keyframes sigilPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(224, 138, 52, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(224, 138, 52, 0.06); }
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  padding: 0.5rem 0.85rem;
  border: var(--line);
  border-radius: var(--radius-pill);
  background: rgba(20, 37, 31, 0.72);
  color: var(--mist);
  cursor: pointer;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.nav-toggle:hover { border-color: rgba(216, 180, 90, 0.55); background: rgba(47, 107, 87, 0.4); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 1.05rem;
}
.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: var(--gold);
  transition: transform 0.3s var(--ease), opacity 0.2s linear;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.3rem, 0.9vw, 0.8rem);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.1rem;
}

.nav-item { display: block; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.5rem 0.62rem;
  border-radius: 0.65rem;
  color: var(--text-soft);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color 0.24s var(--ease), background 0.24s var(--ease);
}

.nav-link__index {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.02em;
  color: var(--gold);
  opacity: 0.5;
  transition: opacity 0.24s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--mist);
  background: rgba(47, 107, 87, 0.24);
}
.nav-link:hover .nav-link__index { opacity: 0.95; }

.nav-link[aria-current="page"] {
  color: var(--mist);
  background: rgba(47, 107, 87, 0.3);
}
.nav-link[aria-current="page"] .nav-link__index { opacity: 1; color: var(--gold); }
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.62rem;
  right: 0.62rem;
  bottom: 0.16rem;
  height: 1.5px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(216, 180, 90, 0.05));
}

.header__cta { margin-left: 0.35rem; }

/* ==========================================================================
   按钮
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.68rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(216, 180, 90, 0.32);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.4;
  text-align: center;
  cursor: pointer;
  transition: transform 0.26s var(--ease), background 0.26s var(--ease),
              border-color 0.26s var(--ease), box-shadow 0.26s var(--ease), color 0.26s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(140deg, var(--bronze), #1E4738);
  border-color: rgba(216, 180, 90, 0.55);
  box-shadow: 0 12px 26px -16px rgba(47, 107, 87, 0.95),
              inset 0 1px 0 rgba(244, 240, 228, 0.14);
}
.btn--primary:hover {
  background: linear-gradient(140deg, var(--bronze-lift), var(--bronze));
  border-color: var(--gold);
  box-shadow: 0 16px 32px -16px rgba(216, 180, 90, 0.42);
}

.btn--ghost {
  background: rgba(20, 37, 31, 0.62);
  border-color: rgba(110, 142, 127, 0.42);
}
.btn--ghost:hover {
  background: rgba(47, 107, 87, 0.34);
  border-color: var(--gold);
}

.btn--quiet {
  padding: 0.5rem 0.88rem;
  font-size: 0.82rem;
  background: rgba(47, 107, 87, 0.2);
  border-color: transparent;
}
.btn--quiet:hover { background: rgba(47, 107, 87, 0.36); border-color: rgba(216, 180, 90, 0.42); }

/* ==========================================================================
   页脚 · 神殿基座
   ========================================================================== */
.site-footer {
  position: relative;
  flex: none;
  margin-top: clamp(2.6rem, 6vw, 5.5rem);
  border-top: var(--hair-gold);
  background:
    radial-gradient(96% 130% at 50% 0%, rgba(47, 107, 87, 0.32), transparent 64%),
    linear-gradient(180deg, #0B1310 0%, var(--ink) 68%, var(--ink-deep) 100%);
  color: var(--text-soft);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -2px;
  transform: translateX(-50%);
  width: min(54rem, 92%);
  height: 15rem;
  background: radial-gradient(58% 100% at 50% 0%, rgba(216, 180, 90, 0.14), transparent 72%);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(216, 180, 90, 0.6) 30%, rgba(63, 167, 196, 0.45) 70%, transparent);
}

.footer__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(2.4rem, 5.5vw, 4.2rem) var(--gutter) clamp(1.6rem, 3.5vw, 2.4rem);
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr) minmax(0, 1.15fr);
  gap: clamp(1.6rem, 3.6vw, 3.4rem);
  align-items: start;
}

.footer__brand { display: flex; flex-direction: column; align-items: flex-start; gap: 0.55rem; }

.footer__name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--mist);
  line-height: 1.3;
}

.footer__descriptor {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 24rem;
}

.footer__meta {
  margin-top: 0.35rem;
  display: inline-flex;
  padding: 0.28rem 0.72rem;
  border: var(--hair-gold);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: rgba(216, 180, 90, 0.85);
  background: rgba(20, 37, 31, 0.6);
}

.footer__heading {
  display: flex;
  align-items: center;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.26em;
  color: var(--gold);
}
.footer__heading::before {
  content: "";
  width: 1.25rem;
  height: 1px;
  margin-right: 0.55rem;
  background: var(--gold);
  opacity: 0.7;
}

.footer__list { display: grid; gap: 0.1rem; }

.footer__link {
  display: inline-block;
  padding: 0.34rem 0;
  font-size: 0.92rem;
  color: var(--text-soft);
  transition: color 0.24s var(--ease), transform 0.24s var(--ease);
}
.footer__link:hover,
.footer__link:focus-visible {
  color: var(--gold);
  transform: translateX(4px);
}

.footer__contact { min-width: 0; }

.footer__contact-row {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(110, 142, 127, 0.16);
}
.footer__contact-row:last-of-type { border-bottom: 0; }

.footer__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--moss);
}

.footer__value {
  font-size: 0.9rem;
  color: rgba(244, 240, 228, 0.92);
  overflow-wrap: anywhere;
}

.footer__note {
  margin-top: 0.9rem;
  padding-left: 0.85rem;
  border-left: 2px solid rgba(224, 138, 52, 0.55);
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.footer__bottom {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 1rem var(--gutter) 1.6rem;
  border-top: 1px solid rgba(110, 142, 127, 0.18);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--moss);
}

.footer__copy { display: inline-flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; }
.footer__icp { color: rgba(216, 180, 90, 0.8); }
.footer__domain { color: rgba(63, 167, 196, 0.82); letter-spacing: 0.08em; }

/* ==========================================================================
   通用布局与内容组件
   ========================================================================== */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(2.4rem, 5.5vw, 4.8rem); }

.section__head { display: flex; flex-direction: column; gap: 0.7rem; margin-bottom: clamp(1.4rem, 3vw, 2.4rem); }

.section__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 3.1vw, 2.65rem);
  letter-spacing: 0.015em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.28em;
  color: var(--gold);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 1.8rem;
  height: 1px;
  background: currentColor;
  opacity: 0.75;
}

.lede {
  max-width: 48ch;
  font-size: clamp(1rem, 0.5vw + 0.9rem, 1.12rem);
  line-height: 1.85;
  color: var(--text-dim);
}

.prose { max-width: 68ch; }
.prose p + p { margin-top: 1.1em; }
.prose a {
  color: var(--gold);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.24em;
}
.prose a:hover { color: var(--mist); }

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.1rem, 2.6vw, 2.2rem);
}
.grid > * { min-width: 0; }
.grid__wide,
.grid__aside { grid-column: 1 / -1; }
.grid__full { grid-column: 1 / -1; }

@media (min-width: 900px) {
  .grid { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .grid__wide { grid-column: span 8; }
  .grid__aside { grid-column: span 4; }
}

/* 悬浮铭牌 */
.plate {
  position: relative;
  padding: clamp(1.05rem, 2.2vw, 1.65rem);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(216, 180, 90, 0.24);
  background:
    radial-gradient(120% 120% at 80% 0%, rgba(47, 107, 87, 0.4), transparent 62%),
    linear-gradient(158deg, rgba(20, 37, 31, 0.94), rgba(10, 15, 13, 0.94));
  box-shadow: var(--shadow-plate), inset 0 1px 0 rgba(244, 240, 228, 0.06);
}
.plate::after {
  content: "";
  position: absolute;
  left: 1.5rem;
  right: 1.5rem;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), rgba(216, 180, 90, 0));
}

.plate__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.22em;
  color: var(--moss);
  margin-bottom: 0.4rem;
}

.plate__value {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 2.6vw, 2.15rem);
  line-height: 1.2;
  color: var(--gold);
  letter-spacing: 0.02em;
}

/* 语义标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.62rem;
  border-radius: var(--radius-pill);
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  line-height: 1.7;
  color: var(--moss);
  background: rgba(110, 142, 127, 0.1);
}
.tag--gold { color: var(--gold); background: rgba(216, 180, 90, 0.1); }
.tag--cyan { color: var(--cyan); background: rgba(63, 167, 196, 0.1); }
.tag--amber { color: var(--amber); background: rgba(224, 138, 52, 0.1); }
.tag--violet { color: var(--violet); background: rgba(122, 90, 248, 0.14); }

/* 图像容器基础规则（页面阶段放入 img / svg 占位） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(110, 142, 127, 0.3);
  background:
    radial-gradient(120% 110% at 28% 0%, rgba(47, 107, 87, 0.55), transparent 64%),
    radial-gradient(90% 90% at 90% 100%, rgba(122, 90, 248, 0.22), transparent 60%),
    linear-gradient(160deg, #12201B, #0A0F0D);
  box-shadow: var(--shadow-plate);
}
.media-frame > img,
.media-frame > picture,
.media-frame > svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 3 / 4; }
.media-frame--arch {
  aspect-ratio: 3 / 4;
  border-radius: 12rem 12rem 1.2rem 1.2rem;
  border-color: rgba(216, 180, 90, 0.35);
}

@media (max-width: 620px) {
  .media-frame--arch { border-radius: 7rem 7rem 1.1rem 1.1rem; }
}

/* 面包屑 */
.breadcrumb {
  padding-block: clamp(0.9rem, 2vw, 1.4rem) 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  color: var(--moss);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 0.5rem; }
.breadcrumb__link { color: rgba(244, 240, 228, 0.72); transition: color 0.2s var(--ease); }
.breadcrumb__link:hover { color: var(--gold); }
.breadcrumb__sep { color: rgba(110, 142, 127, 0.55); }
.breadcrumb__item [aria-current="page"] { color: var(--gold); }

/* 发丝线 / 纵向注释 */
.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(216, 180, 90, 0.5), rgba(110, 142, 127, 0.16), transparent);
}

.annotation {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.26em;
  line-height: 1.6;
  color: var(--moss);
  writing-mode: vertical-rl;
  text-orientation: mixed;
}
@media (max-width: 700px) {
  .annotation { writing-mode: horizontal-tb; }
}

/* 显现动画（仅在 JS 可用时隐藏初始态） */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.62s var(--ease), transform 0.62s var(--ease);
}
.js-reveal [data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 80;
  width: 2.9rem;
  height: 2.9rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(216, 180, 90, 0.45);
  background: linear-gradient(150deg, rgba(47, 107, 87, 0.95), rgba(10, 15, 13, 0.95));
  color: var(--gold);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 16px 34px -18px rgba(0, 0, 0, 0.95);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.to-top[data-visible] { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { border-color: var(--gold); color: var(--mist); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1100px) {
  .header__note { display: none; }
  .site-nav { margin-left: auto; }
}

@media (max-width: 1024px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    margin-left: 0;
    padding: 1rem var(--gutter) 1.45rem;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    background: linear-gradient(180deg, rgba(12, 20, 17, 0.99), rgba(10, 15, 13, 0.99));
    border-bottom: var(--hair-gold);
    box-shadow: 0 34px 60px -34px rgba(0, 0, 0, 0.95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.6rem);
    pointer-events: none;
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s linear;
  }
  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0.12rem; }
  .nav-link {
    padding: 0.72rem 0.85rem;
    font-size: 1rem;
    border-radius: 0.72rem;
  }
  .nav-link[aria-current="page"]::after { display: none; }
  .nav-link[aria-current="page"] { box-shadow: inset 3px 0 0 var(--gold); }

  .header__cta { margin: 0.7rem 0 0; width: 100%; }
}

@media (max-width: 900px) {
  .footer__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  :root { --header-h: 4rem; }
  .footer__inner { grid-template-columns: minmax(0, 1fr); }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .brand__descriptor { font-size: 0.55rem; letter-spacing: 0.08em; }
  .brand__label { font-size: 0.95rem; }
}

/* ==========================================================================
   动效降级
   ========================================================================== */
@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;
    scroll-behavior: auto !important;
  }
  .header__note-dot { animation: none; box-shadow: 0 0 0 3px rgba(224, 138, 52, 0.18); }
  .js-reveal [data-reveal] { opacity: 1; transform: none; transition: none; }
  .to-top { transition: none; }
}