:root {
  --c-deep: #0B1026;
  --c-panel: #14213D;
  --c-panel-2: #182848;
  --c-cyan: #2DE2E6;
  --c-violet: #7A5AF8;
  --c-gold: #D4AF37;
  --c-bronze: #B87333;
  --c-text: #F1F6FB;
  --c-muted: #A8B6C8;
  --c-line: #1F3A5F;
  --font-display: "Noto Serif SC", "Playfair Display", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container: 1440px;
  --gutter: clamp(1rem, 3vw, 2.5rem);
  --section-space: clamp(3rem, 7vw, 5.5rem);
  --shadow-1: 0 2px 8px rgba(0,0,0,.35);
  --shadow-2: 0 16px 42px rgba(0,0,0,.5);
  --glow-cyan: 0 0 12px rgba(45,226,230,.35);
  --glow-gold: 0 0 14px rgba(212,175,55,.3);
}

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

html {
  min-height: 100%;
  background: var(--c-deep);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-deep);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-text);
}

p {
  margin-top: 0;
}

ul, ol {
  margin-top: 0;
}

dl, dd {
  margin: 0;
}

a {
  color: var(--c-cyan);
}

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

figure {
  margin: 0;
}

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

#main-content {
  min-height: 70vh;
  background: var(--c-deep);
  outline: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.grid-split {
  display: grid;
  gap: clamp(1.5rem, 3vw, 3rem);
}

@media (min-width: 900px) {
  .grid-split {
    grid-template-columns: 1fr 340px;
    align-items: start;
  }
}

.grid-2 {
  display: grid;
  gap: clamp(1.25rem, 2.5vw, 2rem);
}

.grid-3 {
  display: grid;
  gap: clamp(1.25rem, 2.5vw, 2rem);
}

@media (min-width: 700px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1000px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.divider-accent {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-gold) 0%, var(--c-line) 40%, var(--c-cyan) 100%);
  margin: var(--section-space) 0;
}

.bg-grid-overlay {
  position: relative;
}

.bg-grid-overlay::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(31,58,95,.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31,58,95,.22) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.bg-grid-overlay > * {
  position: relative;
  z-index: 1;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--c-text);
}

.page-title .accent {
  color: var(--c-gold);
}

.lead {
  font-size: 1.08rem;
  line-height: 1.85;
  color: var(--c-muted);
}

.muted {
  color: var(--c-muted);
}

.meta-line {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.meta-line .sep {
  margin: 0 0.4rem;
  opacity: 0.5;
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
  flex-wrap: wrap;
}

.section-heading__index {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--c-gold);
  letter-spacing: 0.1em;
}

.section-heading__main {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--c-text);
}

.section-heading__note {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--c-muted);
  text-transform: uppercase;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--c-text);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: border-color .18s, box-shadow .18s, color .18s, background .18s;
}

.btn:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
  box-shadow: var(--glow-cyan);
}

.btn--primary {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-deep);
  font-weight: 700;
}

.btn--primary:hover {
  background: #86F3F6;
  color: var(--c-deep);
  box-shadow: var(--glow-cyan);
}

.btn--gold {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-deep);
  font-weight: 700;
}

.btn--gold:hover {
  background: #F0D77B;
  color: var(--c-deep);
  box-shadow: var(--glow-gold);
}

.btn--ghost {
  background: transparent;
}

.btn--sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.82rem;
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  background: rgba(20,33,61,.6);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  color: var(--c-muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.tag--cyan {
  color: var(--c-cyan);
  border-color: rgba(45,226,230,.45);
  background: rgba(45,226,230,.06);
}

.tag--gold {
  color: var(--c-gold);
  border-color: rgba(212,175,55,.4);
  background: rgba(212,175,55,.06);
}

.panel {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: 8px;
  padding: clamp(1.25rem, 2.5vw, 2rem);
  box-shadow: var(--shadow-1);
}

.panel--cyan { border-left: 3px solid var(--c-cyan); }
.panel--gold { border-left: 3px solid var(--c-gold); }
.panel--violet { border-left: 3px solid var(--c-violet); }
.panel + .panel { margin-top: 1.25rem; }

.callout {
  padding: 1.2rem 1.5rem;
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-gold);
  border-radius: 6px;
  background: var(--c-panel);
  color: var(--c-muted);
  font-size: 0.92rem;
}

.callout strong {
  color: var(--c-text);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.stat {
  padding: 1.2rem;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: 8px;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1.1;
  color: var(--c-gold);
}

.stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--c-line);
  border-radius: 8px;
  background: var(--c-panel);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--c-line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: rgba(11,16,38,.55);
  color: var(--c-gold);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover {
  background: rgba(45,226,230,.04);
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.check-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
}

.check-list li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 0.16em;
  font-size: 0.7rem;
  color: var(--c-cyan);
}

.img-frame {
  position: relative;
  display: block;
  background:
    linear-gradient(135deg, rgba(122,90,248,.08) 0%, transparent 55%),
    var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: var(--img-ratio, 16/9);
}

.img-frame::after {
  content: attr(data-caption);
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.35rem 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--c-muted);
  background: rgba(11,16,38,.82);
  border-top: 1px solid rgba(31,58,95,.6);
  opacity: 0;
  transition: opacity .15s;
}

.img-frame:hover::after {
  opacity: 1;
}

.breadcrumb {
  margin-block: 1rem 2rem;
  font-size: 0.8rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--c-line);
}

.breadcrumb a {
  color: var(--c-muted);
  text-decoration: none;
  letter-spacing: 0.06em;
}

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

.breadcrumb [aria-current="page"] {
  color: var(--c-text);
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.pagination a,
.pagination span {
  display: inline-grid;
  place-items: center;
  min-width: 38px;
  height: 38px;
  padding: 0 0.6rem;
  border: 1px solid var(--c-line);
  border-radius: 6px;
  color: var(--c-text);
  text-decoration: none;
  font-size: 0.85rem;
}

.pagination a:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
  box-shadow: var(--glow-cyan);
}

.pagination .is-current {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-deep);
  font-weight: 700;
}

.field {
  display: block;
  margin-bottom: 1rem;
}

.field-label {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.input,
.select,
.textarea {
  width: 100%;
  padding: 0.65rem 0.8rem;
  background: var(--c-panel-2);
  border: 1px solid var(--c-line);
  border-radius: 6px;
  color: var(--c-text);
  font: 0.9rem var(--font-body);
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--c-cyan);
  box-shadow: var(--glow-cyan);
  outline: none;
}

.tabset {
  margin-block: 1.5rem 2rem;
}

.tabset-tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--c-line);
}

.tabset-trigger {
  padding: 0.55rem 1.1rem;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--c-muted);
  font: 600 0.9rem var(--font-body);
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: color .15s, border-color .15s;
}

.tabset-trigger:hover {
  color: var(--c-text);
}

.tabset-trigger[aria-selected="true"] {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

.tabset-panel {
  padding-top: 1.5rem;
}

.tabset-panel[hidden] {
  display: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 999;
  background: linear-gradient(90deg, var(--c-gold) 0 20%, var(--c-cyan) 60%, var(--c-violet) 100%);
  transform-origin: 0 50%;
  transform: scaleX(0);
  pointer-events: none;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 1000;
  padding: 0.65rem 1.2rem;
  background: var(--c-gold);
  color: var(--c-deep);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 0 0 8px 8px;
  transition: top .18s ease;
}

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

.site-header {
  position: relative;
  background: linear-gradient(180deg, var(--c-deep) 0%, var(--c-deep) 78%, rgba(7,10,24,1) 100%);
  border-bottom: 1px solid var(--c-line);
}

.header-topline {
  max-width: var(--container);
  margin-inline: auto;
  padding: 0.45rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid rgba(31,58,95,.55);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.header-topline-mark {
  margin: 0;
}

.header-topline-mark::before {
  content: "◆ ";
  color: var(--c-gold);
}

.header-version {
  margin: 0;
  color: var(--c-gold);
  font-weight: 500;
}

.header-main {
  position: relative;
}

.header-main::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold) 0 34%, rgba(45,226,230,.45) 34% 100%);
  z-index: 2;
}

.header-main-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-height: 72px;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--c-text);
  text-decoration: none;
}

.brand-glyph {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, var(--c-gold) 0%, #F0D77B 45%, var(--c-bronze) 130%);
  color: var(--c-deep);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  clip-path: polygon(0 14%, 86% 0, 100% 86%, 14% 100%);
  box-shadow: var(--glow-gold);
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--c-text);
}

.brand-sub {
  font-size: 0.7rem;
  color: var(--c-muted);
  letter-spacing: 0.1em;
}

.header-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: 0.15rem;
}

.header-nav-link {
  position: relative;
  display: block;
  padding: 0.5rem 0.85rem;
  color: var(--c-muted);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  transition: color .15s;
}

.header-nav-link::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.2rem;
  height: 2px;
  background: var(--c-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .16s ease;
}

.header-nav-link:hover,
.header-nav-link[aria-current="page"] {
  color: var(--c-text);
}

.header-nav-link:hover::after {
  transform: scaleX(1);
}

.header-nav-link[aria-current="page"] {
  color: var(--c-cyan);
}

.header-nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-gold);
}

.nav-toggle {
  display: none;
  appearance: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.85rem;
  margin-left: auto;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: 6px;
  color: var(--c-text);
  font: 500 0.82rem var(--font-body);
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}

.nav-toggle:hover {
  border-color: var(--c-cyan);
  box-shadow: var(--glow-cyan);
}

.nav-toggle-label {
  line-height: 1;
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
  line-height: 0;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  background: var(--c-cyan);
  transition: transform .18s, opacity .18s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--c-deep);
  border-top: 1px solid var(--c-line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-cyan), var(--c-violet));
  opacity: 0.55;
  z-index: 2;
}

.site-footer::after {
  content: "問";
  position: absolute;
  right: 2vw;
  bottom: -1.2rem;
  font-family: var(--font-display);
  font-size: clamp(7rem, 18vw, 12rem);
  line-height: 1;
  color: rgba(212, 175, 55, 0.04);
  pointer-events: none;
  user-select: none;
}

.footer-main {
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.6fr;
  gap: clamp(1.5rem, 3vw, 3rem);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.footer-brand-col {
  min-width: 0;
}

.footer-brand-col .brand-lockup {
  margin-bottom: 1rem;
}

.trust-statement {
  margin: 1.1rem 0 0;
  max-width: 52ch;
  font-size: 0.84rem;
  line-height: 1.8;
  color: var(--c-muted);
}

.footer-col .footer-col-title,
.footer-contact-col .footer-col-title {
  margin-bottom: 0.9rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-gold);
  text-transform: uppercase;
}

.footer-col-title::before {
  content: "◇ ";
  color: var(--c-cyan);
}

.footer-col-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col-list li {
  margin-bottom: 0.45rem;
}

.footer-col-list a {
  color: var(--c-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color .15s, padding-left .15s;
}

.footer-col-list a:hover {
  color: var(--c-cyan);
  padding-left: 0.25rem;
}

.footer-contact-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
}

.contact-item {
  display: grid;
  grid-template-columns: 3.2em 1fr;
  gap: 0.6rem;
  font-size: 0.85rem;
}

.contact-item dt {
  color: var(--c-gold);
  letter-spacing: 0.1em;
}

.contact-item dd {
  color: var(--c-muted);
  line-height: 1.6;
}

.footer-legal {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(31,58,95,.65);
  background: rgba(7,10,24,.45);
}

.footer-legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.45rem 1.2rem;
  padding-block: 1.1rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.footer-legal-inner p {
  margin: 0;
}

.legal-divider {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--c-gold);
  opacity: 0.7;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .header-nav-link {
    padding-inline: 0.6rem;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-main-inner {
    flex-wrap: wrap;
    padding-top: 0.7rem;
    padding-bottom: 0.7rem;
  }

  .header-nav {
    display: none;
    flex-basis: 100%;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    margin-left: 0;
    border-top: 1px solid var(--c-line);
    margin-top: 0.35rem;
    padding-top: 0.4rem;
  }

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

  .header-nav-link {
    padding: 0.75rem 0.25rem;
    border-bottom: 1px solid rgba(31,58,95,.4);
  }

  .header-nav-link:last-child {
    border-bottom: 0;
  }

  .header-nav-link::after {
    display: none;
  }
}

@media (max-width: 640px) {
  .header-topline {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.1rem;
  }

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

  .brand-glyph {
    width: 40px;
    height: 40px;
    font-size: 1.15rem;
  }

  .brand-title {
    font-size: 1.1rem;
  }

  .contact-item {
    grid-template-columns: 3em 1fr;
  }
}