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

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

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  background-color: #0a1128;
  background-image: radial-gradient(ellipse at 82% 15%, rgba(31, 58, 122, 0.35), transparent 55%), radial-gradient(ellipse at 15% 85%, rgba(255, 90, 31, 0.05), transparent 40%);
  color: #e8e6e3;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: #ff8c5a;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #ff5a1f;
}

ul,
ol {
  list-style: none;
}

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

/* ============ CSS Variables ============ */
:root {
  --color-bg-dark: #0a1128;
  --color-bg-secondary: #162447;
  --color-bg-blue: #1f3a7a;
  --color-cream: #f5efe0;
  --color-cream-light: #fff9ef;
  --color-ink: #1a1814;
  --color-gray-white: #e8e6e3;
  --color-accent: #ff5a1f;
  --color-accent-soft: #ff8c5a;
  --color-teal: #26c6a3;
  --color-purple: #8c7ae6;

  --font-headline: "Archivo Black", "Arial Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-data: "Source Code Pro", "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;

  --container-max: 1200px;
  --container-pad: 1.5rem;
  --radius-lg: 12px;
  --radius-sm: 6px;
  --radius-pill: 999px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  --z-header: 100;
  --z-nav-mobile: 200;
  --z-back-top: 300;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

/* ============ Utilities ============ */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

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

/* ============ Focus ============ */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ============ Skip Link ============ */
.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-4);
  z-index: 1000;
  background: var(--color-accent);
  color: #fff;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: var(--space-4);
  outline: none;
  box-shadow: 0 4px 20px rgba(255, 90, 31, 0.4);
}

/* ============ Scroll Progress ============ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: calc(var(--z-header) + 1);
  pointer-events: none;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.875rem;
  line-height: 1.2;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.btn-accent:hover {
  background: var(--color-accent-soft);
  border-color: var(--color-accent-soft);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 90, 31, 0.35);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(232, 230, 227, 0.35);
  color: var(--color-gray-white);
}

.btn-outline-light:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn-mini {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  border-width: 1px;
}

/* ============ Header ============ */
.site-header {
  position: relative;
  z-index: var(--z-header);
}

/* --- Topbar --- */
.header-topbar {
  background: var(--color-bg-dark);
  border-bottom: 1px solid rgba(245, 239, 224, 0.12);
}

.header-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 38px;
}

.topbar-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-serif);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: rgba(232, 230, 227, 0.6);
}

.topbar-brand {
  font-weight: 700;
  color: var(--color-gray-white);
  letter-spacing: 0.12em;
}

.topbar-sep {
  color: rgba(232, 230, 227, 0.3);
}

.topbar-slogan {
  color: rgba(232, 230, 227, 0.55);
}

.topbar-code {
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.28em;
  color: rgba(232, 230, 227, 0.3);
  text-transform: uppercase;
}

/* --- Navbar --- */
.header-navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-bg-secondary);
  border-bottom: 1px solid rgba(245, 239, 224, 0.08);
}

.header-navbar-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  min-height: 64px;
}

.header-brand {
  display: flex;
  align-items: baseline;
  gap: 0.375rem;
  margin-right: auto;
  flex-shrink: 0;
}

.header-brand-mark {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.header-brand-name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-gray-white);
  letter-spacing: 0.06em;
}

.header-brand-tag {
  font-family: var(--font-data);
  font-size: 0.5625rem;
  letter-spacing: 0.22em;
  color: rgba(232, 230, 227, 0.4);
  margin-left: 0.25rem;
}

/* --- Nav Desktop --- */
.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.875rem;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.875rem;
  color: rgba(232, 230, 227, 0.75);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: #fff;
  background: rgba(31, 58, 122, 0.5);
}

.nav-link[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(255, 90, 31, 0.08);
}

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.875rem;
  right: 0.875rem;
  bottom: -1px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px 2px 0 0;
}

/* --- Nav Tools --- */
.nav-tools {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-search-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
  color: rgba(232, 230, 227, 0.7);
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-search-link:hover {
  color: #fff;
  background: rgba(31, 58, 122, 0.4);
}

.nav-search-dot {
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  position: relative;
}

.nav-search-dot::after {
  content: "";
  position: absolute;
  bottom: -4px;
  right: -4px;
  width: 5px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transform: rotate(45deg);
}

.nav-actions-mobile {
  display: none;
}

/* --- Nav Toggle --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  align-items: center;
  border-radius: var(--radius-sm);
  color: var(--color-gray-white);
  flex-shrink: 0;
  transition: background-color 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(31, 58, 122, 0.5);
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ Mobile Nav ============ */
@media (max-width: 960px) {
  .header-topbar-code {
    display: none;
  }

  .nav-tools {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid rgba(245, 239, 224, 0.12);
    padding: var(--space-6) var(--space-6) var(--space-8);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.125rem;
  }

  .nav-item {
    border-bottom: 1px solid rgba(245, 239, 224, 0.07);
  }

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    display: block;
    padding: 0.875rem 0.5rem;
    font-size: 0.9375rem;
    border-radius: 0;
  }

  .nav-link[aria-current="page"]::after {
    left: 0.5rem;
    right: auto;
    width: 3px;
    height: 100%;
    bottom: 0;
    border-radius: 0 3px 3px 0;
  }

  .nav-actions-mobile {
    display: flex;
    gap: var(--space-3);
    padding-top: var(--space-4);
  }

  .nav-actions-mobile .btn {
    flex: 1;
  }
}

/* ============ Footer ============ */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, #0a1128 0%, #050a18 100%);
  border-top: 1px solid rgba(245, 239, 224, 0.08);
  margin-top: var(--space-24);
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--color-accent) 0px, var(--color-accent) 5px, transparent 5px, transparent 11px, var(--color-teal) 11px, var(--color-teal) 13px, transparent 13px, transparent 20px);
  opacity: 0.7;
}

.footer-primary {
  padding: var(--space-16) 0 var(--space-12);
}

.footer-grid {
  display: grid;
  grid-template-columns: 4fr 2fr 2fr 3fr;
  gap: var(--space-12);
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-logo-mark {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--color-accent);
  background: rgba(255, 90, 31, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.footer-logo-name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  color: var(--color-gray-white);
}

.footer-about {
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(232, 230, 227, 0.6);
  max-width: 40ch;
}

.footer-trust {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: rgba(38, 198, 163, 0.75);
  border-left: 2px solid var(--color-teal);
  padding-left: 0.75rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-heading {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--color-gray-white);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
}

.footer-heading-index {
  font-family: var(--font-data);
  font-size: 0.6875rem;
  color: var(--color-accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: rgba(232, 230, 227, 0.6);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-accent-soft);
  padding-left: 4px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  font-size: 0.875rem;
  color: rgba(232, 230, 227, 0.6);
  line-height: 1.7;
}

.contact-label {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(232, 230, 227, 0.4);
  margin-right: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid rgba(245, 239, 224, 0.07);
  padding: var(--space-6) 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copy {
  font-size: 0.8125rem;
  color: rgba(232, 230, 227, 0.5);
  margin-right: auto;
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
}

.footer-legal a {
  color: rgba(232, 230, 227, 0.55);
}

.footer-legal a:hover {
  color: var(--color-accent-soft);
}

.footer-dot {
  color: rgba(232, 230, 227, 0.25);
}

.footer-icp {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: rgba(232, 230, 227, 0.4);
  letter-spacing: 0.05em;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  right: var(--space-6);
  bottom: var(--space-6);
  z-index: var(--z-back-top);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(255, 90, 31, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.2s ease, visibility 0.3s ease;
}

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

.back-to-top:hover {
  background: var(--color-accent-soft);
  transform: translateY(-3px);
}

.back-to-top-icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* --- Footer Responsive --- */
@media (max-width: 960px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12) var(--space-8);
  }

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

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .footer-copy {
    margin-right: 0;
  }
}

/* ============ Breadcrumb ============ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: var(--space-6) 0;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: rgba(232, 230, 227, 0.45);
}

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

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

.crumb-sep {
  color: rgba(232, 230, 227, 0.25);
}

.crumb-current {
  color: var(--color-gray-white);
}

/* ============ Page Hero ============ */
.page-hero {
  position: relative;
  padding: var(--space-16) 0 var(--space-12);
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  right: -5%;
  bottom: -40px;
  width: 42%;
  height: 90px;
  background: var(--color-accent);
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.12;
  pointer-events: none;
}

.page-hero-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.page-hero-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.5;
}

.page-hero-title {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(2rem, 4.5vw, 3.75rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-gray-white);
  max-width: 14em;
  margin-bottom: var(--space-6);
}

.page-hero-subtitle {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(232, 230, 227, 0.75);
  max-width: 45em;
  margin-bottom: var(--space-8);
}

.page-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(232, 230, 227, 0.5);
}

.page-hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.page-hero-meta span::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-teal);
  opacity: 0.7;
}

/* ============ Section ============ */
.section {
  padding: var(--space-16) 0;
}

.section-header {
  margin-bottom: var(--space-12);
}

.section-kicker {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.2;
  color: var(--color-gray-white);
  margin-bottom: var(--space-4);
}

.section-intro {
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(232, 230, 227, 0.7);
  max-width: 50em;
}

/* ============ Bento Grid ============ */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-6);
}

.bento-cell {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.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;
}

.col-span-12 {
  grid-column: span 12;
}

@media (max-width: 960px) {
  .bento-grid {
    gap: var(--space-4);
  }

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

@media (max-width: 600px) {
  .col-span-3,
  .col-span-4,
  .col-span-6,
  .col-span-8,
  .col-span-9,
  .col-span-12 {
    grid-column: 1 / -1;
  }
}

/* ============ Cards ============ */
.paper-card {
  position: relative;
  background: var(--color-cream);
  color: var(--color-ink);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.paper-card::after {
  content: "";
  position: absolute;
  inset: 0.625rem;
  border: 1px solid rgba(26, 24, 20, 0.14);
  border-radius: 8px;
  pointer-events: none;
}

.paper-card h1,
.paper-card h2,
.paper-card h3,
.paper-card h4,
.paper-card h5,
.paper-card h6 {
  color: var(--color-ink);
}

.paper-card p {
  color: rgba(26, 24, 20, 0.8);
}

.data-card {
  position: relative;
  background: linear-gradient(145deg, var(--color-bg-secondary), var(--color-bg-dark));
  border: 1px solid rgba(245, 239, 224, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.data-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 24%;
  height: 4px;
  background: repeating-linear-gradient(90deg, var(--color-accent) 0px, var(--color-accent) 4px, transparent 4px, transparent 8px);
  border-radius: 0 12px 0 0;
}

.data-value {
  font-family: var(--font-data);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-gray-white);
  margin-bottom: 0.25rem;
}

.data-label {
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(232, 230, 227, 0.55);
}

.data-trend {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
}

.data-trend[data-trend="up"] {
  color: var(--color-teal);
}

.data-trend[data-trend="down"] {
  color: var(--color-accent);
}

/* ============ Tags ============ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-data);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.tag-accent {
  background: rgba(255, 90, 31, 0.12);
  color: var(--color-accent);
  border-color: rgba(255, 90, 31, 0.3);
}

.tag-teal {
  background: rgba(38, 198, 163, 0.1);
  color: var(--color-teal);
  border-color: rgba(38, 198, 163, 0.28);
}

.tag-purple {
  background: rgba(140, 122, 230, 0.12);
  color: #a89bf0;
  border-color: rgba(140, 122, 230, 0.3);
}

.tag-outline {
  background: transparent;
  color: rgba(232, 230, 227, 0.65);
  border-color: rgba(232, 230, 227, 0.25);
}

/* ============ Exhibit Label ============ */
.exhibit-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3125rem 0.875rem;
  border: 1px solid rgba(255, 90, 31, 0.35);
  border-radius: var(--radius-pill);
  background: rgba(255, 90, 31, 0.07);
  font-family: var(--font-data);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.exhibit-label::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ============ Image Frames ============ */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(22, 36, 71, 0.9), rgba(31, 58, 122, 0.5)), var(--color-bg-secondary);
  border: 1px solid rgba(245, 239, 224, 0.08);
}

.img-frame::before {
  content: attr(data-placeholder-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(232, 230, 227, 0.55);
  z-index: 2;
  text-align: center;
  padding: 1.5rem;
}

.img-frame::after {
  content: "";
  display: block;
}

.img-frame-16x9::after {
  padding-bottom: 56.25%;
}

.img-frame-4x3::after {
  padding-bottom: 75%;
}

.img-frame-1x1::after {
  padding-bottom: 100%;
}

/* ============ Reveal Animation ============ */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

[data-reveal-delay="1"] {
  transition-delay: 0.12s;
}

[data-reveal-delay="2"] {
  transition-delay: 0.24s;
}

[data-reveal-delay="3"] {
  transition-delay: 0.36s;
}

/* ============ Responsive Base ============ */
@media (max-width: 960px) {
  .header-navbar-inner {
    min-height: 56px;
    gap: var(--space-4);
  }

  .header-brand-tag {
    display: none;
  }

  .topbar-code {
    display: none;
  }

  .section {
    padding: var(--space-12) 0;
  }

  .site-footer {
    margin-top: var(--space-16);
  }

  .footer-primary {
    padding: var(--space-12) 0 var(--space-8);
  }
}

@media (max-width: 600px) {
  .container {
    padding-inline: 1rem;
  }

  :root {
    --container-pad: 1rem;
  }

  .header-navbar-inner {
    gap: 0.5rem;
  }

  .header-brand-mark {
    font-size: 1.25rem;
  }

  .header-brand-name {
    font-size: 1.0625rem;
  }

  .paper-card {
    padding: var(--space-6);
  }

  .page-hero {
    padding: var(--space-12) 0 var(--space-8);
  }

  .back-to-top {
    right: var(--space-4);
    bottom: var(--space-4);
    width: 44px;
    height: 44px;
  }
}

/* ============ Reduced Motion ============ */
@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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .back-to-top {
    transition: opacity 0.01ms ease, transform 0.01ms ease;
  }
}