:root {
  --clr-primary: #0A1E3B;
  --clr-primary-soft: #132E4A;
  --clr-interactive: #1E496E;
  --clr-gold-pale: #F5E7C1;
  --clr-gold: #C9A063;
  --clr-ice: #E8EFF7;
  --clr-white: #FFFFFF;
  --clr-alert: #D93636;
  --clr-link: #78B6D4;
  --font-head: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Songti SC", "STSong", Georgia, serif;
  --container: 1200px;
  --container-narrow: 760px;
  --radius-card: 12px;
  --radius-organic: 20px 6px 22px 8px / 24px 8px 20px 10px;
  --shadow-card: 0 12px 30px rgba(10, 30, 59, 0.08);
  --shadow-deep: 0 24px 60px rgba(10, 30, 59, 0.18);
  --transition: 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  margin: 0;
  background: var(--clr-ice);
  color: var(--clr-primary);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.5vw + 0.9rem, 1.0625rem);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

#main-content {
  outline: none;
}

h1, h2, h3, h4, p, ul, ol, dl, figure, blockquote {
  margin-top: 0;
  margin-bottom: 1.25rem;
}

ul[class], ol[class] {
  list-style: none;
  padding: 0;
  margin: 0;
}

a {
  color: var(--clr-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

button {
  font: inherit;
}

address {
  font-style: normal;
}

hr {
  border: 0;
  border-top: 1px solid rgba(10, 30, 59, 0.12);
  margin: 3rem 0;
}

::selection {
  background: var(--clr-gold);
  color: var(--clr-primary);
}

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

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.section--dark {
  background: var(--clr-primary);
  color: var(--clr-white);
}

.section--light {
  background: var(--clr-ice);
  color: var(--clr-primary);
}

.section--paper {
  background: var(--clr-white);
  color: var(--clr-primary);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--clr-white);
}

.section--dark a {
  color: var(--clr-link);
}

.grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--aside {
  grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr);
}

.divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: clamp(2.5rem, 5vw, 4rem) 0;
  color: var(--clr-gold);
}

.divider::before,
.divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, transparent, rgba(201, 160, 99, 0.55));
}

.divider::after {
  background: linear-gradient(90deg, rgba(201, 160, 99, 0.55), transparent);
}

h1, h2, h3, h4, .h1, .h2, .h3, .h4 {
  font-family: var(--font-head);
  color: var(--clr-primary);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-wrap: balance;
}

h1, .h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: 0.04em;
}

h2, .h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

h3, .h3 {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
}

h4, .h4 {
  font-size: 1rem;
  letter-spacing: 0.12em;
}

p {
  text-wrap: pretty;
}

.kicker {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.32em;
  color: var(--clr-gold);
  margin-bottom: 1rem;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(4rem, 10vw, 7rem) 0;
  background:
    radial-gradient(circle at 82% 22%, rgba(201, 160, 99, 0.2), transparent 40%),
    radial-gradient(circle at 12% 82%, rgba(30, 73, 110, 0.8), transparent 48%),
    var(--clr-primary);
  color: var(--clr-white);
}

.hero__title {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 6.5vw, 5rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.1;
  color: var(--clr-white);
  margin-bottom: 1rem;
}

.hero__lead {
  color: rgba(232, 239, 247, 0.78);
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  max-width: 42em;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-header {
  position: relative;
  padding: clamp(2.5rem, 6vw, 4rem) 0;
  background:
    radial-gradient(circle at 80% 40%, rgba(30, 73, 110, 0.55), transparent 45%),
    var(--clr-primary);
  color: var(--clr-white);
  border-bottom: 3px solid var(--clr-gold);
}

.page-header__title {
  color: var(--clr-white);
  margin-bottom: 0.35rem;
}

.page-header__desc {
  color: rgba(232, 239, 247, 0.78);
  font-size: 1.0625rem;
  max-width: 56ch;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: 2px 14px 2px 14px;
  border: 1px solid transparent;
  font-family: var(--font-head);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn--primary {
  background: var(--clr-gold);
  color: var(--clr-primary);
}

.btn--primary:hover {
  background: #d7b778;
  box-shadow: 0 8px 24px rgba(201, 160, 99, 0.3);
}

.btn--ghost {
  background: transparent;
  border-color: var(--clr-gold);
  color: var(--clr-gold);
}

.btn--ghost:hover {
  background: rgba(201, 160, 99, 0.12);
}

.btn--light {
  background: var(--clr-white);
  color: var(--clr-primary);
}

.btn--light:hover {
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
}

.breadcrumbs {
  margin: 1.5rem 0 0;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-head);
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
}

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

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 0.5rem;
  color: rgba(10, 30, 59, 0.35);
}

.breadcrumbs__link {
  color: var(--clr-link);
  text-decoration: none;
}

.breadcrumbs__link:hover {
  text-decoration: underline;
}

.breadcrumbs__current {
  color: var(--clr-primary);
  font-weight: 700;
}

.breadcrumbs--light {
  color: rgba(232, 239, 247, 0.7);
}

.breadcrumbs--light .breadcrumbs__link {
  color: var(--clr-link);
}

.breadcrumbs--light .breadcrumbs__current {
  color: var(--clr-white);
}

.breadcrumbs--light .breadcrumbs__item + .breadcrumbs__item::before {
  color: rgba(232, 239, 247, 0.4);
}

.panel {
  background: var(--clr-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.panel--organic {
  border-radius: var(--radius-organic);
}

.panel--evidence {
  border-left: 3px solid var(--clr-gold);
}

.panel--dark {
  background: var(--clr-primary-soft);
  color: var(--clr-white);
}

.panel__meta {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(10, 30, 59, 0.1);
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(10, 30, 59, 0.6);
}

.callout {
  background: var(--clr-gold-pale);
  border: 1px solid rgba(201, 160, 99, 0.5);
  border-radius: 2px 16px 2px 16px;
  padding: 1.25rem 1.5rem;
  color: var(--clr-primary);
  font-size: 0.9375rem;
}

.callout strong,
.callout b {
  color: #8a6a2f;
}

.note {
  background: rgba(120, 182, 212, 0.12);
  border-left: 3px solid var(--clr-link);
  border-radius: 0 12px 12px 0;
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 1.1rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.step {
  position: relative;
  padding: 1.6rem 1.6rem 1.6rem 4.2rem;
  background: var(--clr-white);
  border-radius: var(--radius-organic);
  box-shadow: var(--shadow-card);
}

.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 1.4rem;
  top: 1.5rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.375rem;
  color: var(--clr-gold);
}

.step__title {
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--clr-primary);
  margin-bottom: 0.4rem;
}

.step__desc {
  margin: 0;
  font-size: 0.9375rem;
  color: rgba(10, 30, 59, 0.82);
}

.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--clr-gold), var(--clr-interactive));
}

.timeline__item {
  position: relative;
  padding: 0 0 1.5rem 1.5rem;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 0.4rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--clr-gold-pale);
  border: 2px solid var(--clr-gold);
}

.tabs {
  margin: 1.5rem 0;
}

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(10, 30, 59, 0.15);
}

.tabs__tab {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: rgba(10, 30, 59, 0.7);
  font-family: var(--font-head);
  font-size: 0.84375rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 0.25s, color 0.25s, border-color 0.25s;
}

.tabs__tab:hover {
  color: var(--clr-primary);
  background: rgba(30, 73, 110, 0.08);
}

.tabs__tab[aria-selected="true"] {
  background: var(--clr-primary);
  color: var(--clr-white);
  border-color: var(--clr-primary);
}

.tabs__panel {
  padding: 1.5rem 0;
  animation: tabFade 0.35s ease;
}

.tabs__panel[hidden] {
  display: none;
}

@keyframes tabFade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background:
    linear-gradient(135deg, rgba(201, 160, 99, 0.18), rgba(30, 73, 110, 0.25)),
    var(--clr-primary-soft);
  box-shadow: var(--shadow-card);
}

.img-frame--16x9 {
  aspect-ratio: 16 / 9;
}

.img-frame--4x3 {
  aspect-ratio: 4 / 3;
}

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

.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .img-frame img {
    transition: transform 0.6s ease;
  }
  .img-frame:hover img {
    transform: scale(1.03);
  }
}

.field {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.field__label {
  font-family: var(--font-head);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--clr-primary);
}

.field__input,
.field__select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid rgba(10, 30, 59, 0.22);
  border-radius: 4px 12px 4px 12px;
  background: var(--clr-white);
  color: var(--clr-primary);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.field__input:focus,
.field__select:focus {
  outline: none;
  border-color: var(--clr-gold);
  box-shadow: 0 0 0 3px rgba(201, 160, 99, 0.2);
}

.field__hint {
  font-size: 0.8125rem;
  color: rgba(10, 30, 59, 0.6);
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 3000;
  padding: 0.65rem 1.1rem;
  background: var(--clr-gold);
  color: var(--clr-primary);
  font-family: var(--font-head);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border-radius: 0 0 8px 8px;
  text-decoration: none;
  transition: top 0.25s ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2500;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-gold), var(--clr-gold-pale));
  pointer-events: none;
}

.site-header {
  position: relative;
  background:
    radial-gradient(circle at 14% 12%, rgba(30, 73, 110, 0.55), transparent 40%),
    radial-gradient(circle at 86% 18%, rgba(201, 160, 99, 0.18), transparent 36%),
    var(--clr-primary);
  color: var(--clr-white);
  box-shadow: 0 20px 50px rgba(10, 30, 59, 0.25);
}

.site-header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem clamp(1rem, 4vw, 2.5rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.site-header__meta {
  margin: 0;
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: rgba(232, 239, 247, 0.68);
}

.site-header__meta::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.7rem;
  border-radius: 50%;
  background: var(--clr-gold);
  vertical-align: 1px;
  box-shadow: 0 0 0 3px rgba(201, 160, 99, 0.25);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(201, 160, 99, 0.55);
  border-radius: 999px;
  background: var(--clr-gold-pale);
  color: var(--clr-primary);
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.version-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-gold);
}

.masthead {
  position: relative;
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1rem, 4vw, 2.5rem) clamp(1.4rem, 3vw, 2rem);
  text-align: center;
}

.masthead__brand {
  display: inline-block;
  text-decoration: none;
  color: inherit;
}

.masthead__name {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.1;
  color: var(--clr-white);
}

.masthead__sub {
  display: block;
  margin-top: 0.9rem;
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: rgba(232, 239, 247, 0.72);
}

.masthead__sub::before,
.masthead__sub::after {
  content: "◆";
  display: inline-block;
  margin: 0 0.9rem;
  color: var(--clr-gold);
  font-size: 0.45rem;
  vertical-align: middle;
}

.site-nav {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(19, 46, 74, 0.58);
}

.nav-list {
  display: flex;
  justify-content: center;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
}

.nav-list__item {
  flex: 0 0 auto;
}

.nav-link {
  position: relative;
  display: block;
  padding: 1rem clamp(0.85rem, 2.4vw, 2rem);
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-head);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-decoration: none;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0;
  height: 2px;
  background: var(--clr-gold);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s ease;
}

.nav-link:hover {
  color: var(--clr-gold);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--clr-gold);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.8rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 4px 12px 4px 12px;
  color: var(--clr-white);
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.nav-toggle:hover {
  border-color: var(--clr-gold);
  background: rgba(201, 160, 99, 0.12);
}

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

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--clr-gold);
  border-radius: 2px;
}

.nav-toggle__label {
  line-height: 1;
}

.site-footer {
  position: relative;
  background: var(--clr-primary);
  color: rgba(232, 239, 247, 0.75);
  padding-top: clamp(3rem, 6vw, 5rem);
  font-size: 0.9375rem;
}

.site-footer__decor {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-gold), rgba(245, 231, 193, 0.4), var(--clr-gold));
  opacity: 0.9;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
}

.footer-brand__name {
  margin-bottom: 0.5rem;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--clr-white);
}

.footer-brand__desc {
  max-width: 24em;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(232, 239, 247, 0.72);
}

.footer-brand__trust {
  margin-bottom: 0;
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--clr-gold);
}

.footer-nav__title,
.footer-links__title,
.footer-contact__title {
  margin-bottom: 1.25rem;
  font-family: var(--font-head);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--clr-white);
}

.footer-nav__list,
.footer-links__list {
  display: grid;
  gap: 0.75rem;
}

.footer-nav__list a,
.footer-links__list a {
  color: rgba(232, 239, 247, 0.72);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.25s ease;
}

.footer-nav__list a:hover,
.footer-links__list a:hover {
  color: var(--clr-gold);
}

.footer-contact__addr {
  font-size: 0.875rem;
  line-height: 1.9;
  color: rgba(232, 239, 247, 0.8);
}

.footer-contact__note {
  margin: 1rem 0 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--clr-gold);
  color: var(--clr-gold-pale);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.25rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(232, 239, 247, 0.55);
}

.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 1500;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--clr-gold);
  background: var(--clr-primary);
  color: var(--clr-gold);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  box-shadow: 0 8px 20px rgba(10, 30, 59, 0.3);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

.back-to-top.is-shown {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-to-top:hover {
  background: var(--clr-gold);
  color: var(--clr-primary);
}

.back-to-top__icon {
  display: block;
  font-family: var(--font-head);
}

@media (max-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 767px) {
  .grid--2,
  .grid--3,
  .grid--aside {
    grid-template-columns: 1fr;
  }

  .site-header__meta {
    display: none;
  }

  .masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    padding: 1.25rem clamp(1rem, 4vw, 2rem);
  }

  .masthead__name {
    font-size: 1.4rem;
    letter-spacing: 0.08em;
  }

  .masthead__sub {
    margin-top: 0.35rem;
    font-size: 0.68rem;
    letter-spacing: 0.16em;
  }

  .masthead__sub::before,
  .masthead__sub::after {
    display: none;
  }

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

  .site-nav {
    display: none;
    padding: 0 clamp(1rem, 4vw, 2rem) 0.75rem;
  }

  .site-nav[data-open="true"] {
    display: block;
    animation: navReveal 0.3s ease;
  }

  @keyframes navReveal {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }

  .nav-list {
    flex-direction: column;
  }

  .nav-link {
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-link::after {
    left: 0;
    right: auto;
    width: 2.5rem;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .site-footer__bottom {
    flex-direction: column;
  }

  .back-to-top {
    right: 1rem;
    bottom: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }

  .reveal,
  .reveal.is-visible {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .site-nav[data-open="true"] {
    animation: none !important;
  }

  .tabs__panel {
    animation: none !important;
  }

  .back-to-top {
    transition: none;
  }

  .skip-link {
    transition: none;
  }
}