/* =========================================================
   星空竞界 Site Kit — /assets/site.css
   杂志刊头 + 星空竞技场 / 深空蓝 × 星云紫 × 荧光绿
   ========================================================= */

/* ---------- 1. Design Tokens ---------- */
:root {
  --c-space: #0B1F3A;
  --c-space-deep: #08152A;
  --c-nebula: #6C4AB6;
  --c-neon: #39FF14;
  --c-mist: #B8C7D9;
  --c-void: #0A0E1A;
  --c-white: #FFFFFF;
  --c-lilac: #9B8CE0;
  --c-moss: #1F7A1F;

  --font-display: 'Russo One', 'Noto Sans SC', sans-serif;
  --font-heading: 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --fz-hero: clamp(2.75rem, 5vw, 4.5rem);
  --fz-h1: clamp(2.125rem, 4vw, 3.25rem);
  --fz-h2: clamp(1.625rem, 3vw, 2.5rem);
  --fz-h3: 1.25rem;
  --fz-body: 1rem;
  --fz-small: 0.875rem;
  --fz-meta: 0.75rem;

  --container-max: 1280px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --gap: 1.5rem;

  --nav-h: 56px;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --transition: 0.2s var(--ease);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: 60px;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fz-body);
  line-height: 1.75;
  color: var(--c-white);
  background: var(--c-space);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

ul,
ol {
  list-style: none;
}

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

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

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

::selection {
  background: var(--c-neon);
  color: var(--c-void);
}

:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 3px;
  border-radius: 0;
}

/* ---------- 3. Layout & Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.corpus {
  flex: 1;
  width: 100%;
  padding-block: clamp(2rem, 6vw, 4rem);
}

#main-content:focus {
  outline: none;
}

.skip-link {
  position: fixed;
  left: -9999px;
  top: 0;
  z-index: 9999;
  background: var(--c-neon);
  color: var(--c-void);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fz-small);
  padding: 0.625rem 1.5rem;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 0 100%);
  letter-spacing: 0.04em;
}

.skip-link:focus {
  left: 0;
  outline: 2px solid var(--c-white);
  outline-offset: -2px;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
}

.grid {
  display: grid;
  gap: var(--gap);
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

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

.col-span-4 {
  grid-column: span 4;
}

.col-span-6 {
  grid-column: span 6;
}

.col-span-8 {
  grid-column: span 8;
}

.col-span-9 {
  grid-column: span 9;
}

.editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  gap: clamp(1.5rem, 4vw, 3rem);
}

.editorial-grid__note {
  border-top: 2px solid var(--c-nebula);
  padding-top: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  color: var(--c-mist);
  line-height: 2;
  position: relative;
}

.editorial-grid__note::before {
  content: 'FIELD NOTES';
  display: block;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  color: var(--c-neon);
  margin-bottom: 0.5rem;
}

.editorial-grid__main {
  min-width: 0;
}

.divider {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, var(--c-nebula), rgba(108, 74, 182, 0.1) 70%, transparent);
  margin-block: 2.5rem;
}

/* ---------- 4. Header ---------- */
.site-header {
  background: var(--c-space);
  position: relative;
  z-index: 100;
  border-bottom: 1px solid rgba(108, 74, 182, 0.35);
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 15% 30%, rgba(255, 255, 255, 0.5), transparent 100%),
    radial-gradient(1.5px 1.5px at 75% 20%, rgba(155, 140, 224, 0.6), transparent 100%),
    radial-gradient(1px 1px at 60% 65%, rgba(255, 255, 255, 0.3), transparent 100%),
    radial-gradient(1px 1px at 90% 40%, rgba(57, 255, 20, 0.35), transparent 100%),
    radial-gradient(1.5px 1.5px at 45% 15%, rgba(255, 255, 255, 0.4), transparent 100%);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-nebula), var(--c-neon));
  z-index: 1000;
  pointer-events: none;
}

.mast-meta {
  background: var(--c-void);
  border-bottom: 1px solid rgba(57, 255, 20, 0.14);
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  letter-spacing: 0.08em;
  color: var(--c-mist);
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

.mast-meta__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 34px;
  gap: 1rem;
}

.mast-meta__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.mast-meta__item::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--c-neon);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.mast-meta__item--dim {
  color: rgba(184, 199, 217, 0.55);
}

.masthead {
  position: relative;
  z-index: 1;
  padding-block: clamp(1.25rem, 3.5vw, 2.75rem);
}

.masthead__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.masthead__inner::before,
.masthead__inner::after {
  content: '';
  position: absolute;
  top: 50%;
  width: clamp(32px, 8vw, 140px);
  height: 1px;
}

.masthead__inner::before {
  left: 0;
  background: linear-gradient(90deg, transparent, var(--c-nebula));
}

.masthead__inner::after {
  right: 0;
  background: linear-gradient(90deg, var(--c-nebula), transparent);
}

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
}

.masthead__name {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: 0.06em;
  color: var(--c-white);
  position: relative;
  padding-bottom: 0.375rem;
}

.masthead__name::after {
  content: '';
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-nebula), var(--c-neon));
}

.masthead__slogan {
  font-size: var(--fz-small);
  color: var(--c-mist);
  letter-spacing: 0.32em;
  margin-top: 0.375rem;
  padding-left: 0.32em;
}

.nav-bar {
  position: relative;
  z-index: 10;
  background: var(--c-void);
  border-top: 1px solid rgba(108, 74, 182, 0.4);
  border-bottom: 1px solid rgba(57, 255, 20, 0.15);
}

.nav-bar__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: var(--nav-h);
}

/* desktop — toggle hidden, nav centered, CTA right */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border: 1px solid rgba(108, 74, 182, 0.5);
  background: rgba(108, 74, 182, 0.1);
  color: var(--c-white);
  font-weight: 700;
  font-size: var(--fz-small);
  transition: border-color var(--transition), background var(--transition);
}

.nav-toggle:hover {
  border-color: var(--c-neon);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--c-neon);
  background: rgba(57, 255, 20, 0.08);
}

.nav-toggle__box {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

.nav-toggle__label {
  font-size: var(--fz-meta);
  letter-spacing: 0.08em;
}

.site-nav {
  grid-column: 2;
  display: flex;
  justify-content: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  display: block;
  padding: 0.5rem 1rem;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--c-mist);
  position: relative;
  transition: color var(--transition);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0;
  height: 2px;
  background: var(--c-neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition);
}

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

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after {
  transform: scaleX(1);
}

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

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--c-neon), var(--c-nebula));
}

.nav-bar__cta {
  grid-column: 3;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: var(--c-neon);
  color: var(--c-void);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: filter var(--transition), transform var(--transition);
}

.nav-bar__cta:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

/* ---------- 5. Footer ---------- */
.site-footer {
  background: var(--c-void);
  color: var(--c-mist);
  margin-top: auto;
  position: relative;
}

.site-footer::before {
  content: '';
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--c-nebula), var(--c-neon) 50%, transparent 100%);
}

.footer-core {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.25fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.footer-core__brand {
  margin-bottom: 0.5rem;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--c-white);
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.footer-brand__slogan {
  font-size: var(--fz-small);
  color: var(--c-lilac);
  letter-spacing: 0.18em;
  margin-top: 0.25rem;
}

.footer-core__trust {
  font-size: var(--fz-small);
  color: var(--c-mist);
  max-width: 36em;
  line-height: 1.9;
  margin-top: 1rem;
  border-left: 2px solid var(--c-nebula);
  padding-left: 1rem;
}

.footer-core__heading {
  font-size: var(--fz-small);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-white);
  text-transform: uppercase;
  margin-bottom: 0.875rem;
  font-family: var(--font-heading);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: var(--fz-small);
  color: var(--c-mist);
  transition: color var(--transition), padding-left var(--transition);
  position: relative;
}

.footer-links a::before {
  content: '/';
  color: var(--c-neon);
  margin-right: 0.5rem;
  font-family: var(--font-mono);
}

.footer-links a:hover {
  color: var(--c-neon);
  padding-left: 0.25rem;
}

.footer-contact__line {
  font-size: var(--fz-small);
  line-height: 2;
  color: var(--c-mist);
}

.footer-contact__line--note {
  font-size: var(--fz-meta);
  color: rgba(184, 199, 217, 0.55);
  border-top: 1px dashed rgba(184, 199, 217, 0.2);
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  line-height: 1.8;
}

.footer-base {
  border-top: 1px solid rgba(184, 199, 217, 0.12);
  padding-block: 1rem;
}

.footer-base__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  color: var(--c-mist);
}

.back-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 500;
  width: 44px;
  height: 44px;
  background: var(--c-void);
  border: 1px solid var(--c-nebula);
  border-radius: 0;
  color: var(--c-white);
  font-size: 1.25rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  transition: opacity var(--transition), visibility var(--transition), border-color var(--transition), color var(--transition);
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.back-top:hover {
  border-color: var(--c-neon);
  color: var(--c-neon);
}

/* ---------- 6. Typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.3;
  text-wrap: balance;
  margin-block: 1.5em 0.5em;
}

h1 {
  font-size: var(--fz-h1);
}

h2 {
  font-size: var(--fz-h2);
}

h3 {
  font-size: var(--fz-h3);
}

p {
  color: var(--c-mist);
  text-wrap: pretty;
}

strong {
  color: var(--c-white);
  font-weight: 700;
}

em {
  color: var(--c-lilac);
  font-style: normal;
}

blockquote {
  border-left: 3px solid var(--c-nebula);
  padding-left: 1.25rem;
  color: var(--c-mist);
  font-style: italic;
  margin-block: 1.5rem;
}

figure {
  margin-block: 2rem;
}

/* ---------- 7. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.6;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  letter-spacing: 0.04em;
  background: transparent;
  color: var(--c-white);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  transition: background var(--transition), border-color var(--transition), color var(--transition), filter var(--transition), transform var(--transition);
}

.btn--primary {
  background: var(--c-neon);
  color: var(--c-void);
}

.btn--primary:hover {
  filter: brightness(1.12);
  transform: translateY(-1px);
}

.btn--nebula {
  background: var(--c-nebula);
  color: var(--c-white);
}

.btn--nebula:hover {
  background: var(--c-lilac);
  transform: translateY(-1px);
}

.btn--ghost {
  border-color: rgba(108, 74, 182, 0.6);
  color: var(--c-white);
}

.btn--ghost:hover {
  border-color: var(--c-neon);
  color: var(--c-neon);
}

.btn--large {
  padding: 0.875rem 2rem;
  font-size: 1.0625rem;
}

.btn--small {
  padding: 0.375rem 1rem;
  font-size: 0.8125rem;
}

/* ---------- 8. Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  letter-spacing: 0.02em;
  background: rgba(108, 74, 182, 0.15);
  color: var(--c-lilac);
  border: 1px solid rgba(108, 74, 182, 0.4);
}

.tag--live {
  background: rgba(57, 255, 20, 0.08);
  border-color: rgba(57, 255, 20, 0.4);
  color: var(--c-neon);
}

.tag--live::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--c-neon);
  border-radius: 0;
  display: inline-block;
  animation: pulse 1.6s ease-in-out infinite;
}

.tag--updated {
  background: rgba(31, 122, 31, 0.15);
  border-color: rgba(31, 122, 31, 0.5);
  color: #6FDD6F;
}

.tag--muted {
  background: rgba(184, 199, 217, 0.08);
  border-color: rgba(184, 199, 217, 0.25);
  color: var(--c-mist);
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

/* ---------- 9. Cards ---------- */
.card {
  background: linear-gradient(135deg, rgba(11, 31, 58, 0.95), rgba(10, 14, 26, 0.9));
  border: 1px solid rgba(108, 74, 182, 0.3);
  padding: 1.5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: rgba(57, 255, 20, 0.5);
  transform: translateY(-2px);
}

.card--board {
  border-left: 3px solid var(--c-nebula);
}

.card--board::after {
  content: '';
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 20px;
  height: 20px;
  border-right: 1px solid var(--c-neon);
  border-bottom: 1px solid var(--c-neon);
  opacity: 0.4;
  pointer-events: none;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.4;
}

.card__desc {
  font-size: var(--fz-small);
  color: var(--c-mist);
  line-height: 1.8;
  flex: 1;
}

.card__meta {
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  color: var(--c-lilac);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(184, 199, 217, 0.12);
}

/* ---------- 10. Image Frames ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 30% 30%, rgba(108, 74, 182, 0.18), transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(57, 255, 20, 0.08), transparent 50%),
    var(--c-space-deep);
  border: 1px solid rgba(108, 74, 182, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 160px;
}

.img-frame::before {
  content: attr(data-caption);
  position: relative;
  z-index: 1;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  color: rgba(184, 199, 217, 0.6);
  text-align: center;
  letter-spacing: 0.05em;
  line-height: 1.7;
  text-transform: uppercase;
}

.img-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 25%, rgba(255, 255, 255, 0.5), transparent 100%),
    radial-gradient(1.5px 1.5px at 75% 20%, rgba(155, 140, 224, 0.6), transparent 100%),
    radial-gradient(2px 2px at 60% 70%, rgba(57, 255, 20, 0.3), transparent 100%),
    radial-gradient(1px 1px at 85% 55%, rgba(255, 255, 255, 0.35), transparent 100%),
    radial-gradient(1px 1px at 40% 85%, rgba(255, 255, 255, 0.25), transparent 100%);
  pointer-events: none;
}

.img-frame > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
}

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

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

.img-frame--1-1 {
  aspect-ratio: 1 / 1;
}

.img-frame--wide {
  aspect-ratio: 21 / 9;
}

/* ---------- 11. Data Table ---------- */
.data-table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(108, 74, 182, 0.3);
  background: rgba(11, 31, 58, 0.5);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fz-small);
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(184, 199, 217, 0.1);
  white-space: nowrap;
}

.data-table th {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--c-neon);
  background: rgba(108, 74, 182, 0.15);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: var(--fz-meta);
}

.data-table td {
  color: var(--c-mist);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover {
  background: rgba(108, 74, 182, 0.08);
}

/* ---------- 12. Research Board Components ---------- */
.term-box {
  border: 1px solid rgba(108, 74, 182, 0.4);
  background: rgba(108, 74, 182, 0.06);
  padding: 1.25rem;
  position: relative;
  margin-block: 1rem;
}

.term-box::before {
  content: 'TERM';
  position: absolute;
  top: -0.7em;
  left: 1rem;
  padding: 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.15em;
  color: var(--c-lilac);
  background: var(--c-space);
  text-transform: uppercase;
}

.term-box__title {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--c-white);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.term-box__desc {
  font-size: var(--fz-small);
  color: var(--c-mist);
  line-height: 1.8;
}

.summary-block {
  border-left: 3px solid var(--c-neon);
  background: rgba(57, 255, 20, 0.04);
  padding: 1.25rem 1.5rem;
  margin-block: 1.5rem;
}

.summary-block__label {
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  color: var(--c-neon);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.375rem;
}

.summary-block__text {
  font-size: var(--fz-small);
  color: var(--c-white);
  line-height: 1.8;
}

.note-line {
  display: flex;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  color: var(--c-mist);
  line-height: 1.8;
  padding-block: 0.375rem;
  border-bottom: 1px dashed rgba(184, 199, 217, 0.15);
}

.note-line__idx {
  color: var(--c-nebula);
  flex-shrink: 0;
}

.note-line--accent {
  color: var(--c-lilac);
}

/* ---------- 13. Section Anchor ---------- */
.section-anchor {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(108, 74, 182, 0.3);
}

.section-anchor__num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1;
  color: var(--c-nebula);
  flex-shrink: 0;
}

.section-anchor__text {
  display: flex;
  flex-direction: column;
}

.section-anchor__label {
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  color: var(--c-neon);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  line-height: 1.4;
}

.section-anchor__heading {
  font-family: var(--font-heading);
  font-size: var(--fz-h3);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.3;
  margin: 0.125rem 0 0;
}

/* ---------- 14. Breadcrumb ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--fz-meta);
  color: var(--c-mist);
  padding-block: 0.875rem;
  border-bottom: 1px solid rgba(184, 199, 217, 0.15);
  margin-bottom: 2rem;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  color: var(--c-nebula);
}

.breadcrumb__link {
  color: var(--c-mist);
  transition: color var(--transition);
}

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

.breadcrumb__item--current {
  color: var(--c-white);
  font-weight: 700;
}

/* ---------- 15. Reveal ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 16. Responsive ---------- */
@media (min-width: 769px) and (max-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .col-span-3,
  .col-span-4 {
    grid-column: span 4;
  }

  .col-span-6,
  .col-span-8,
  .col-span-9 {
    grid-column: span 6;
  }

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

@media (max-width: 768px) {
  .masthead__inner::before,
  .masthead__inner::after {
    display: none;
  }

  .mast-meta__item--dim {
    display: none;
  }

  .masthead__slogan {
    letter-spacing: 0.18em;
  }

  .nav-bar__inner {
    display: flex;
    align-items: center;
    min-height: 48px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    grid-column: auto;
    display: none;
    flex-direction: column;
    background: var(--c-void);
    border-bottom: 1px solid rgba(108, 74, 182, 0.5);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.45);
  }

  .site-nav[data-open] {
    display: flex;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .site-nav__item {
    border-bottom: 1px solid rgba(184, 199, 217, 0.08);
  }

  .site-nav__item:last-child {
    border-bottom: none;
  }

  .site-nav__link {
    padding: 0.875rem 1.5rem;
    font-size: 0.9375rem;
    text-align: center;
  }

  .site-nav__link::after {
    left: 20%;
    right: 20%;
    bottom: 0;
  }

  .nav-bar__cta {
    margin-left: auto;
    padding: 0.375rem 0.875rem;
    font-size: 0.75rem;
    clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

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

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

  .footer-core {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-base__inner {
    flex-direction: column;
    text-align: center;
    gap: 0.375rem;
  }

  .back-top {
    bottom: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
  }
}

/* ---------- 17. Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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

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

  .tag--live::before {
    animation: none;
  }
}