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

:root {
  --color-primary: #1B5FAA;
  --color-primary-deep: #123D6E;
  --color-primary-soft: #E3EDF7;
  --color-accent: #C8102E;
  --color-accent-deep: #9E2B25;
  --color-accent-alt: #FFC107;
  --color-data: #00FF7F;
  --color-bg: #F5F0E6;
  --color-text: #1A1D21;
  --color-white: #FFFFFF;
  --color-shadow: #9E2B25;
  --font-headline: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-number: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --container: 1280px;
  --pad: clamp(1rem, 3.5vw, 2.5rem);
  --shadow-card: 0 4px 0 var(--color-shadow), 0 14px 28px rgba(26, 29, 33, 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--color-accent-alt);
  color: var(--color-text);
}

:focus-visible {
  outline: 3px solid var(--color-accent-alt);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#main-content {
  display: block;
  scroll-margin-top: 1rem;
}

.skip-link {
  position: fixed;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 300;
  display: inline-flex;
  padding: 0.55rem 1.1rem;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  box-shadow: 0 3px 0 var(--color-shadow);
  transform: translateY(-220%);
  transition: transform 0.2s ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 250;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-data) 0%, var(--color-accent-alt) 50%, var(--color-accent) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

.site-header {
  position: relative;
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-primary) 72%, var(--color-primary-deep) 130%);
  color: var(--color-white);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 0%, transparent 66%, rgba(255, 255, 255, 0.07) 66%, rgba(255, 255, 255, 0.07) 71%, transparent 71%);
  pointer-events: none;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent-alt) 0%, var(--color-accent) 45%, var(--color-data) 100%);
  opacity: 0.9;
  z-index: 50;
  pointer-events: none;
}

.header-topbar {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.3rem var(--pad) 0.28rem;
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: 0.8rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.topbar-label {
  letter-spacing: 0.1em;
}

.topbar-contact {
  font-family: var(--font-number);
  font-style: italic;
  letter-spacing: 0.02em;
  color: var(--color-accent-alt);
}

.header-main {
  position: relative;
  z-index: 40;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.75rem var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
  line-height: 1.1;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.6rem;
  height: 2.6rem;
  padding: 0 0.55rem;
  background: var(--color-white);
  color: var(--color-primary);
  font-family: var(--font-number);
  font-style: italic;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.04em;
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 0 var(--color-shadow);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-headline);
  font-size: 1.12rem;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.brand-sub {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-accent-alt);
}

.primary-nav {
  margin-left: auto;
  margin-right: auto;
}

.nav-link-list {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.85rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-white);
  border-radius: var(--radius-pill);
  transition: background 0.22s ease, color 0.22s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  background: rgba(255, 255, 255, 0.13);
  color: var(--color-accent-alt);
}

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

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.18rem;
  height: 3px;
  border-radius: 3px;
  background: var(--color-accent-alt);
}

.header-capsules {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

.capsule-link {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.9rem;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 0 var(--color-shadow);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.capsule-link:hover,
.capsule-link:focus-visible {
  background: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 0 var(--color-shadow);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.12);
  flex-shrink: 0;
  transition: background 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.nav-toggle-bar {
  width: 20px;
  height: 3px;
  border-radius: 3px;
  background: var(--color-white);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.site-footer {
  position: relative;
  background: linear-gradient(115deg, var(--color-primary) 0%, var(--color-primary) 70%, var(--color-primary-deep) 130%);
  color: var(--color-white);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-data) 0%, var(--color-accent) 52%, var(--color-accent-alt) 100%);
  pointer-events: none;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-8) var(--pad) var(--space-6);
  display: grid;
  grid-template-columns: 2.1fr 0.9fr 1fr 1.3fr;
  gap: var(--space-6);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-brand-lockup .brand-mark {
  background: var(--color-accent-alt);
  color: var(--color-primary-deep);
}

.footer-trust {
  margin-top: var(--space-4);
  max-width: 44ch;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.8);
  border-left: 3px solid var(--color-accent-alt);
  padding-left: var(--space-4);
}

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

.footer-title {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-primary-deep);
  background: var(--color-accent-alt);
  border-radius: var(--radius-pill);
  margin-bottom: 0.35rem;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.88);
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-link::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--color-accent-alt);
  transform: translateX(4px);
}

.footer-meta {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.7;
}

.footer-note {
  font-size: 0.78rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.62);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding-top: 0.6rem;
  margin-top: 0.4rem;
  max-width: 34ch;
}

.footer-bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-4) var(--pad) var(--space-5);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.65);
}

.footer-copyright {
  font-family: var(--font-number);
  font-style: italic;
}

.footer-icp {
  letter-spacing: 0.1em;
}

.feedback-slider {
  position: fixed;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  z-index: 160;
  display: flex;
  align-items: stretch;
}

.feedback-tab {
  display: flex;
  align-items: center;
  justify-content: center;
  writing-mode: vertical-rl;
  padding: 1rem 0.55rem;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  box-shadow: 0 4px 0 var(--color-shadow);
  transition: background 0.2s ease;
}

.feedback-tab:hover,
.feedback-tab.is-active {
  background: var(--color-accent-deep);
}

.feedback-panel {
  width: 0;
  overflow: hidden;
  background: var(--color-white);
  color: var(--color-text);
  border-left: 1px solid rgba(26, 29, 33, 0.12);
  box-shadow: -10px 10px 24px rgba(26, 29, 33, 0.16);
  padding: 0;
  transition: width 0.3s ease, padding 0.3s ease;
  white-space: nowrap;
}

.feedback-slider[data-open="true"] .feedback-panel {
  width: 300px;
  padding: var(--space-5);
  white-space: normal;
}

.feedback-title {
  font-family: var(--font-headline);
  font-size: 1.02rem;
  font-weight: 900;
  color: var(--color-primary);
  margin-bottom: 0.45rem;
}

.feedback-text {
  font-size: 0.82rem;
  line-height: 1.6;
  color: rgba(26, 29, 33, 0.75);
  margin-bottom: 0.6rem;
}

.feedback-mail {
  font-family: var(--font-number);
  font-style: italic;
  font-weight: 700;
  font-size: 0.86rem;
  color: var(--color-accent);
  border-top: 1px dashed rgba(26, 29, 33, 0.18);
  padding-top: 0.55rem;
  margin-bottom: 0.8rem;
  word-break: break-all;
}

.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 170;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 1.25rem;
  font-weight: 900;
  box-shadow: 0 4px 0 var(--color-shadow), 0 10px 20px rgba(26, 29, 33, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s, background 0.2s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
}

.page-section {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-10) var(--pad);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(200px, 320px);
  gap: var(--space-5);
  align-items: end;
  margin-bottom: var(--space-6);
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.section-kicker {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.85rem;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  border-radius: var(--radius-pill);
}

.section-title {
  font-family: var(--font-headline);
  font-size: clamp(1.9rem, 4.2vw, 3.2rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.section-note {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--color-text);
  opacity: 0.72;
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-4);
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-5);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 6px 0 var(--color-shadow), 0 18px 30px rgba(26, 29, 33, 0.14);
}

.card--featured {
  grid-column: span 2;
}

.card--featured .card__title {
  font-size: 1.55rem;
}

.card__media {
  margin: calc(-1 * var(--space-5)) calc(-1 * var(--space-5)) var(--space-4);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  font-family: var(--font-number);
  font-style: italic;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.card__title {
  font-family: var(--font-headline);
  font-size: 1.18rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

.card__excerpt {
  font-size: 0.88rem;
  line-height: 1.65;
  color: rgba(26, 29, 33, 0.72);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.data-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.18rem 0.75rem;
  background: rgba(0, 255, 127, 0.12);
  border: 1px solid rgba(0, 255, 127, 0.55);
  color: var(--color-text);
  font-family: var(--font-number);
  font-style: italic;
  font-weight: 700;
  font-size: 0.76rem;
  border-radius: var(--radius-pill);
}

.data-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-data);
  box-shadow: 0 0 6px rgba(0, 255, 127, 0.8);
  animation: dataPulse 1.6s ease-in-out infinite;
}

@keyframes dataPulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.45;
    transform: scale(0.75);
  }
}

.filter-block {
  margin-bottom: var(--space-6);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.chip-filter {
  display: inline-flex;
  align-items: center;
  padding: 0.48rem 1.1rem;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--color-text);
  background: var(--color-white);
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 0 rgba(26, 29, 33, 0.08);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.chip-filter:hover {
  color: var(--color-accent);
  transform: translateY(-2px);
}

.chip-filter.is-active {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 3px 0 var(--color-shadow);
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(var(--color-primary), var(--color-accent));
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: var(--space-4);
  padding-left: 44px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 14px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--color-accent-alt);
  border: 3px solid var(--color-primary);
}

.timeline-time {
  font-family: var(--font-number);
  font-style: italic;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--color-primary);
  text-align: right;
  line-height: 1.5;
}

.timeline-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  border-left: 4px solid var(--color-accent);
  box-shadow: 0 3px 0 rgba(26, 29, 33, 0.08);
}

.timeline-card h3 {
  font-family: var(--font-headline);
  font-size: 1.05rem;
  font-weight: 900;
  margin-bottom: 0.25rem;
}

.timeline-card p {
  font-size: 0.86rem;
  line-height: 1.6;
  color: rgba(26, 29, 33, 0.75);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.84rem;
  color: rgba(26, 29, 33, 0.55);
  padding: var(--space-4) var(--pad) 0;
  max-width: var(--container);
  margin: 0 auto;
}

.breadcrumb a {
  color: var(--color-primary);
  font-weight: 600;
}

.breadcrumb a:hover {
  text-decoration: underline;
  color: var(--color-accent);
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 700;
}

.breadcrumb-sep {
  color: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.68rem 1.35rem;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 4px 0 var(--color-shadow);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--color-shadow);
}

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

.btn-ghost:hover {
  background: var(--color-primary-soft);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.8rem;
}

.image-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary-soft) 0%, var(--color-bg) 55%, rgba(255, 193, 7, 0.55) 100%);
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(27, 95, 170, 0.07) 0 10px, transparent 10px 20px), linear-gradient(135deg, transparent 68%, rgba(200, 16, 46, 0.15) 100%);
}

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

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

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

.prose-container {
  max-width: 72ch;
  margin: 0 auto;
  padding: var(--space-6) var(--pad) var(--space-10);
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--color-text);
}

.prose-container h2 {
  font-family: var(--font-headline);
  font-size: 1.55rem;
  font-weight: 900;
  margin: var(--space-8) 0 var(--space-4);
}

.prose-container h3 {
  font-family: var(--font-headline);
  font-size: 1.2rem;
  font-weight: 900;
  margin: var(--space-6) 0 var(--space-3);
}

.prose-container p {
  margin-bottom: var(--space-4);
}

.prose-container a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose-container a:hover {
  color: var(--color-accent);
}

@media (max-width: 1199px) {
  .header-topbar {
    font-size: 0.72rem;
  }

  .nav-link {
    padding: 0.45rem 0.6rem;
    font-size: 0.86rem;
  }

  .capsule-link {
    padding: 0.35rem 0.7rem;
    font-size: 0.76rem;
  }

  .header-main {
    gap: var(--space-3);
  }
}

@media (max-width: 1023px) {
  .header-main {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .brand-lockup {
    order: 1;
  }

  .nav-toggle {
    order: 2;
    display: flex;
    margin-left: auto;
  }

  .header-capsules {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.3rem;
    margin-top: 0.1rem;
    gap: var(--space-2);
  }

  .capsule-link {
    flex-shrink: 0;
  }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    background: var(--color-primary-deep);
    box-shadow: 0 16px 28px rgba(18, 61, 110, 0.35);
    padding: var(--space-4) var(--pad) var(--space-5);
    border-bottom: 4px solid var(--color-accent);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  }

  .primary-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-link-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 0.7rem 0.9rem;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.92);
    border-radius: var(--radius-md);
  }

  .nav-link:hover,
  .nav-link:focus-visible {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-accent-alt);
  }

  .nav-link[aria-current="page"]::after {
    left: auto;
    right: 1rem;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
  }

  .feedback-slider {
    display: none;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

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

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

  .section-head {
    grid-template-columns: minmax(0, 1fr) minmax(160px, 260px);
  }
}

@media (max-width: 767px) {
  .header-topbar {
    display: none;
  }

  .header-main {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
  }

  .brand-mark {
    min-width: 2.2rem;
    height: 2.2rem;
    font-size: 0.82rem;
    padding: 0 0.4rem;
  }

  .brand-name {
    font-size: 0.98rem;
  }

  .brand-sub {
    font-size: 0.64rem;
    letter-spacing: 0.14em;
  }

  .nav-toggle {
    width: 40px;
    height: 40px;
  }

  .page-section {
    padding: var(--space-6) var(--pad);
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

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

  .card--featured {
    grid-column: auto;
  }

  .card--featured .card__title {
    font-size: 1.25rem;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: var(--space-2);
    padding-left: 40px;
  }

  .timeline::before {
    left: 6px;
  }

  .timeline-item::before {
    left: 1px;
    width: 13px;
    height: 13px;
    top: 12px;
  }

  .timeline-time {
    text-align: left;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .breadcrumb {
    overflow-x: auto;
    white-space: nowrap;
    flex-wrap: nowrap;
  }

  .back-to-top {
    right: 0.85rem;
    bottom: 0.85rem;
    width: 44px;
    height: 44px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }
}