/* ==========================================================================
   银河信誉站 · /assets/site.css
   共享外壳（头部 / 页脚）+ 设计令牌 + 通用组件
   色彩节奏：深空靛蓝底 55% / 星云靛蓝分区 20% / 银灰与月白 20%
             信号青 4% / 荧光青 2% / 暖琥珀 3% / 辅助线 1%
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

body,
h1, h2, h3, h4, h5,
p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }

ul, ol { padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

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

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

table { border-collapse: collapse; width: 100%; }

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

/* ---------- tokens ---------- */
:root {
  /* 色彩 */
  --ink-deep: #0B1026;
  --ink-nebula: #131B3A;
  --silver: #C9D2E3;
  --moon: #F2F5FA;
  --signal: #34D3C8;
  --fluoro: #6CF7E8;
  --amber: #F2A93B;
  --amber-deep: #B8741A;
  --orbit: #5C6B8A;
  --alert: #E06565;

  --line: rgba(92, 107, 138, 0.45);
  --line-soft: rgba(92, 107, 138, 0.24);
  --signal-soft: rgba(52, 211, 200, 0.14);
  --amber-soft: rgba(242, 169, 59, 0.14);
  --ink-glass: rgba(11, 16, 38, 0.93);

  /* 字体 */
  --font-title: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 结构 */
  --max: 1280px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius-organic: 26px 6px 28px 8px;
  --radius-soft: 14px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- base / 中文排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  color: var(--silver);
  background-color: var(--ink-deep);
  background-image:
    radial-gradient(80% 55% at 12% 0%, rgba(52, 211, 200, 0.07), transparent 62%),
    radial-gradient(70% 50% at 92% 8%, rgba(242, 169, 59, 0.05), transparent 60%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.18;
  color: var(--moon);
}

p { max-width: 40em; }

::selection {
  background: var(--signal);
  color: var(--ink-deep);
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -160%);
  padding: 10px 22px;
  border-radius: 0 0 12px 12px;
  background: var(--fluoro);
  color: var(--ink-deep);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

/* ---------- 头部外壳 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--ink-glass);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* 顶部坐标条 */
.header-top {
  background: var(--ink-nebula);
  border-bottom: 1px solid var(--line-soft);
}

.header-top__inner {
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin-inline: auto;
  padding: 8px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.header-top__stamp {
  margin: 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orbit);
  white-space: nowrap;
}

.header-top__stamp::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 9px;
  border-radius: 50%;
  background: var(--signal);
  vertical-align: middle;
  box-shadow: 0 0 10px rgba(52, 211, 200, 0.7);
}

.header-utility {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 20px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.header-utility__link {
  display: inline-block;
  color: var(--silver);
  padding: 2px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.header-utility__link:hover {
  color: var(--fluoro);
  border-bottom-color: var(--fluoro);
}

.header-utility__link--signal {
  color: var(--signal);
}

/* 居中刊头 */
.masthead {
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin-inline: auto;
  padding: 20px 0 16px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}

.masthead__tagline {
  margin: 0;
  max-width: 16em;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--orbit);
}

.masthead__brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  justify-self: center;
  text-align: center;
}

.masthead__mark {
  font-family: var(--font-title);
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.08;
  color: var(--moon);
  text-shadow: 0 0 30px rgba(52, 211, 200, 0.22);
}

.masthead__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--signal);
}

.masthead__meta {
  margin: 0;
  max-width: none;
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orbit);
  white-space: nowrap;
}

/* 刊头下方动线：检索与栏目 */
.header-dock {
  position: relative;
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin-inline: auto;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-direction: row;
  justify-content: center;
}

.site-nav {
  display: flex;
  justify-content: center;
  width: 100%;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(2px, 1.4vw, 26px);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 15px 4px 14px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--silver);
  transition: color 0.18s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 7px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--signal);
  transform: translateX(-50%);
  transition: width 0.24s var(--ease), background-color 0.24s var(--ease);
}

.site-nav__link:hover {
  color: var(--moon);
}

.site-nav__link:hover::after {
  width: calc(100% - 8px);
}

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

.site-nav__link[aria-current="page"]::after {
  width: calc(100% - 8px);
  background: var(--fluoro);
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--silver);
  background: rgba(19, 27, 58, 0.9);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--signal);
  color: var(--fluoro);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(40px, 7vw, 96px);
  background: var(--ink-nebula);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.footer-orbit {
  position: absolute;
  right: -18%;
  bottom: -190px;
  width: 120%;
  height: 360px;
  border-radius: 50%;
  border: 1px solid rgba(92, 107, 138, 0.3);
  pointer-events: none;
}

.footer-orbit::after {
  content: "";
  position: absolute;
  inset: 46px 60px;
  border-radius: 50%;
  border: 1px dashed rgba(52, 211, 200, 0.18);
}

.footer-grid {
  position: relative;
  z-index: 1;
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) 0 clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.25fr;
  gap: clamp(26px, 4vw, 64px);
  align-items: start;
}

.footer-brand__mark {
  margin: 0;
  max-width: none;
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--moon);
}

.footer-brand__summary {
  margin-top: 14px;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
}

.footer-brand__coords {
  margin-top: 18px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal);
}

.footer-heading {
  margin: 0 0 16px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--orbit);
}

.footer-list {
  display: grid;
  gap: 11px;
}

.footer-list__link {
  display: inline-block;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--silver);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.footer-list__link:hover {
  color: var(--fluoro);
  transform: translateX(4px);
}

.footer-list__link--accent {
  margin-top: 18px;
  color: var(--signal);
  font-weight: 700;
}

.footer-contact__list {
  display: grid;
  gap: 14px;
}

.footer-contact__row {
  display: grid;
  gap: 3px;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orbit);
}

.footer-contact__value {
  font-size: 14px;
  line-height: 1.7;
  color: var(--moon);
  word-break: break-word;
}

.footer-legal {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line-soft);
}

.footer-legal__inner {
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin-inline: auto;
  padding: 18px 0 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--orbit);
}

.footer-legal__text {
  margin: 0;
  max-width: none;
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-legal__links a {
  color: var(--silver);
  transition: color 0.18s var(--ease);
}

.footer-legal__links a:hover {
  color: var(--fluoro);
}

/* ==========================================================================
   通用组件
   ========================================================================== */

/* 容器与节奏 */
.container {
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.container--narrow {
  max-width: 880px;
}

.section {
  padding-block: clamp(44px, 7vw, 92px);
}

.section--tight {
  padding-block: clamp(28px, 4vw, 50px);
}

/* 章节题头 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--signal);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}

.section-title {
  font-family: var(--font-title);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.16;
  color: var(--moon);
}

.section-title em {
  font-style: normal;
  color: var(--signal);
}

.lede {
  margin-top: 16px;
  max-width: 34em;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.9;
  color: var(--silver);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.4;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--signal {
  background: var(--signal);
  color: #04121A;
}

.btn--signal:hover {
  background: var(--fluoro);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--silver);
}

.btn--ghost:hover {
  border-color: var(--signal);
  color: var(--fluoro);
}

.btn--amber {
  background: var(--amber);
  color: #22160A;
}

.btn--amber:hover {
  background: var(--amber-deep);
  color: var(--moon);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--signal);
  transition: color 0.18s var(--ease);
}

.link-arrow::after {
  content: "→";
  transition: transform 0.2s var(--ease);
}

.link-arrow:hover {
  color: var(--fluoro);
}

.link-arrow:hover::after {
  transform: translateX(4px);
}

/* 面包屑 */
.breadcrumb {
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin-inline: auto;
  padding-top: 24px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--orbit);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: var(--orbit);
}

.breadcrumb__link {
  color: var(--silver);
  transition: color 0.18s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--fluoro);
}

.breadcrumb__current {
  color: var(--signal);
}

/* 网格 */
.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 30px);
}

.grid--split {
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  align-items: start;
}

.grid--cards {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid--index {
  grid-template-columns: repeat(auto-fill, minmax(212px, 1fr));
}

/* 卡片 */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--ink-nebula);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-organic);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease),
    background-color 0.22s var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--signal);
  background: #162044;
}

.card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.card__title {
  font-family: var(--font-title);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--moon);
}

.card__body {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
}

.card__meta {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orbit);
}

/* 面板 */
.panel {
  padding: clamp(20px, 3vw, 34px);
  background: var(--ink-nebula);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
}

.panel--moon {
  background: var(--moon);
  border-color: var(--amber-deep);
  color: var(--ink-deep);
}

.panel--moon h2,
.panel--moon h3,
.panel--moon h4 {
  color: var(--ink-deep);
}

/* 徽标 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver);
  white-space: nowrap;
}

.badge--signal {
  border-color: var(--signal);
  background: var(--signal-soft);
  color: var(--fluoro);
}

.badge--amber {
  border-color: var(--amber-deep);
  background: var(--amber-soft);
  color: var(--amber);
}

/* 等宽数字 */
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* 框景 */
.frame {
  position: relative;
  padding: clamp(18px, 3vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  background:
    linear-gradient(180deg, rgba(19, 27, 58, 0.65) 0%, rgba(11, 16, 38, 0.35) 100%);
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 15px;
  height: 15px;
  border: 1px solid var(--signal);
  pointer-events: none;
}

.frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
  border-radius: 6px 0 0 0;
}

.frame::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
  border-radius: 0 0 6px 0;
}

/* 图片容器基础规则（页面阶段放置 img 或占位） */
.media {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-organic);
  background:
    radial-gradient(120% 92% at 16% 10%, rgba(52, 211, 200, 0.18), transparent 62%),
    radial-gradient(92% 84% at 86% 90%, rgba(242, 169, 59, 0.13), transparent 58%),
    linear-gradient(160deg, #111A3D 0%, #0B1026 100%);
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(92, 107, 138, 0.2) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(92, 107, 138, 0.2) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.media img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }

.media__placeholder {
  position: relative;
  z-index: 1;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  text-align: center;
  color: var(--orbit);
}

.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orbit);
}

/* 长文排版 */
.prose {
  font-size: 16.5px;
  line-height: 1.95;
  color: var(--silver);
}

.prose h2 {
  margin: 2em 0 0.6em;
  font-size: clamp(20px, 2.4vw, 26px);
}

.prose h3 {
  margin: 1.7em 0 0.5em;
  font-size: clamp(17px, 2vw, 20px);
}

.prose p + p { margin-top: 1.05em; }

.prose a {
  color: var(--signal);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.panel--moon .prose { color: #2A3350; }
.panel--moon .prose h2,
.panel--moon .prose h3 { color: var(--ink-deep); }
.panel--moon .prose a { color: var(--amber-deep); }

/* 表格 */
.table {
  font-size: 14.5px;
}

.table th,
.table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}

.table th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orbit);
}

.table__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--amber);
  white-space: nowrap;
}

.panel--moon .table th,
.panel--moon .table td { border-bottom-color: rgba(11, 16, 38, 0.14); }
.panel--moon .table th { color: #6A7590; }
.panel--moon .table__num { color: var(--amber-deep); }

/* 筛选标签 */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--silver);
  background: transparent;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease),
    background-color 0.18s var(--ease);
}

.tag:hover {
  border-color: var(--signal);
  color: var(--fluoro);
}

.tag[aria-pressed="true"] {
  background: var(--signal);
  border-color: var(--signal);
  color: #04121A;
  font-weight: 700;
}

/* 星轨进度 */
.meter {
  height: 4px;
  border-radius: 999px;
  background: rgba(92, 107, 138, 0.32);
  overflow: hidden;
}

.meter__fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--signal), var(--fluoro));
  transition: width 0.5s var(--ease);
}

/* 滚动显现 */
.reveal {
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.js-reveal .reveal {
  opacity: 0;
  transform: translateY(18px);
  will-change: opacity, transform;
}

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

/* 顶部阅读进度（由 site.js 注入） */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
  background: transparent;
}

.read-progress__bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--signal), var(--fluoro));
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .footer-grid {
    grid-template-columns: 1.3fr 1fr 1fr;
  }
}

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

@media (max-width: 860px) {
  html { scroll-padding-top: 96px; }

  .header-top__inner {
    justify-content: center;
    gap: 10px;
  }

  .header-top__stamp {
    display: none;
  }

  .masthead {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 15px 0 13px;
    justify-items: center;
    text-align: center;
  }

  .masthead__tagline {
    max-width: none;
    text-align: center;
    font-size: 11.5px;
    order: 2;
  }

  .masthead__brand { order: 1; }

  .masthead__meta {
    order: 3;
    justify-self: center;
    font-size: 10px;
    letter-spacing: 0.14em;
  }

  .header-dock {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-toggle {
    display: inline-flex;
    align-self: center;
    margin: 11px 0;
  }

  .site-nav {
    display: none;
    border-top: 1px solid var(--line-soft);
    background: rgba(19, 27, 58, 0.98);
    padding-bottom: 8px;
  }

  .site-header[data-open="true"] .site-nav {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    display: block;
    width: 100%;
    padding: 14px 12px;
    font-size: 16px;
    border-bottom: 1px solid var(--line-soft);
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    color: var(--fluoro);
    border-left: 2px solid var(--fluoro);
    background: var(--signal-soft);
  }

  .site-header[data-open="true"] .nav-toggle {
    border-color: var(--signal);
    color: var(--fluoro);
  }

  .site-header[data-open="true"] .nav-toggle__bars span:first-child {
    transform: translateY(3px) rotate(45deg);
  }

  .site-header[data-open="true"] .nav-toggle__bars span:last-child {
    transform: translateY(-3px) rotate(-45deg);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-orbit {
    bottom: -240px;
    height: 300px;
  }
}

@media (max-width: 560px) {
  body { font-size: 16px; }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-legal__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .btn {
    width: 100%;
    padding: 13px 20px;
  }

  .grid--cards,
  .grid--index {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   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;
  }

  .js-reveal .reveal {
    opacity: 1;
    transform: none;
  }

  .card:hover,
  .btn:hover,
  .footer-list__link:hover,
  .link-arrow:hover::after {
    transform: none;
  }
}