@charset "UTF-8";

/* ========== 1. Reset & Tokens ========== */
:root {
  --bg: #F4EFE7;
  --ink: #1A1917;
  --rock: #4A4843;
  --moss: #5E6B4A;
  --sage: #9AA88A;
  --terracotta: #C56A4A;
  --clay: #E3B193;
  --paper-dark: #EAE2D5;
  --data-green: #D2E5A8;
  --signal-orange: #FF7A45;
  --font-title: 'Noto Sans SC', 'Microsoft YaHei', 'Arial Black', sans-serif;
  --font-data: 'JetBrains Mono', 'Fira Mono', 'Courier New', monospace;
  --font-body: 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --container: 1280px;
}

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

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

body {
  margin: 0;
  background-color: var(--bg);
  background-image: radial-gradient(rgba(26, 25, 23, 0.05) 1px, transparent 1px);
  background-size: 26px 26px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote { margin: 0; }
ul, ol { margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { color: var(--moss); text-decoration: none; }
a:hover { color: var(--terracotta); }
button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--signal-orange);
  outline-offset: 2px;
}

::selection { background: var(--data-green); color: var(--ink); }

/* ========== 2. Layout Toolkit ========== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.bento-cell { grid-column: 1 / -1; min-width: 0; }

@media (min-width: 768px) {
  .bento-cell--4 { grid-column: span 4; }
  .bento-cell--6 { grid-column: span 6; }
  .bento-cell--8 { grid-column: span 8; }
  .bento-cell--12 { grid-column: span 12; }
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stat-item {
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--rock);
  border-left: 4px solid var(--moss);
}

@media (min-width: 768px) {
  .stat-grid { grid-template-columns: repeat(4, 1fr); gap: 24px; }
}

/* ========== 3. Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 22px;
  background: var(--moss);
  color: var(--bg);
  border: 1px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, box-shadow .15s ease;
}

.btn:hover {
  background: var(--terracotta);
  color: var(--bg);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--ink);
}

.btn:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--ink);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--bg);
}

/* ========== 4. Section Heading ========== */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 28px;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--terracotta);
  text-transform: uppercase;
}

.section-kicker::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--terracotta);
  flex: none;
}

.section-title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: .02em;
  margin-top: 2px;
}

@media (min-width: 768px) {
  .section-title { font-size: 36px; }
}

.section-link {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--moss);
  border-bottom: 1px solid currentColor;
}

.section-link:hover { color: var(--terracotta); }

/* ========== 5. Cards ========== */
.card {
  position: relative;
  background: var(--paper-dark);
  border: 1px solid var(--rock);
  box-shadow: 5px 5px 0 rgba(26, 25, 23, 0.12);
  padding: 24px;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.card:hover { border-color: var(--terracotta); }

.card--dark {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
  box-shadow: 5px 5px 0 var(--clay);
}

.card--dark .data-num { color: var(--data-green); }
.card--dark .data-label { color: var(--sage); }
.card--dark .data-num--positive { color: var(--data-green); }
.card--dark .data-num--accent { color: var(--signal-orange); }

/* ========== 6. Data Typography ========== */
.data-num {
  font-family: var(--font-data);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.data-num--lg { font-size: 44px; }
.data-num--sm { font-size: 18px; }
.data-num--positive { color: var(--moss); }
.data-num--accent { color: var(--terracotta); }

.data-label {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--rock);
  text-transform: uppercase;
  line-height: 1.4;
}

/* ========== 7. Tags & Badges ========== */
.tag,
.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .08em;
  border: 1px solid var(--rock);
  color: var(--rock);
  background: var(--bg);
  padding: 2px 10px;
  border-radius: 2px;
  white-space: nowrap;
}

.tag--new {
  background: var(--terracotta);
  border-color: var(--terracotta);
  color: var(--bg);
}

.tag--old {
  background: var(--sage);
  border-color: var(--sage);
  color: var(--ink);
}

.version-badge { padding: 3px 10px; }
.version-badge--new { border-color: var(--terracotta); color: var(--terracotta); background: transparent; }

/* ========== 8. Tabs ========== */
.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 2px solid var(--ink);
}

.tab-button {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-size: 14px;
  font-weight: 600;
  color: var(--rock);
  padding: 10px 18px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color .2s ease, background .2s ease;
}

.tab-button:hover { color: var(--terracotta); }

.tab-button[aria-selected="true"] {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.tab-panel { padding-top: 24px; }
.tab-panel[hidden] { display: none; }

/* ========== 9. Reveal & Motion ========== */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s ease, transform .5s ease;
}

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

/* ========== 10. Image Frames ========== */
.image-frame {
  position: relative;
  display: block;
  background: var(--paper-dark);
  border: 1px solid var(--rock);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: var(--paper-dark);
  background-image:
    repeating-linear-gradient(90deg, rgba(26, 25, 23, 0.08) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(0deg, rgba(26, 25, 23, 0.08) 0 1px, transparent 1px 24px);
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(26, 25, 23, 0.14);
  pointer-events: none;
}

.image-frame--tall { aspect-ratio: 3 / 4; }
.image-frame--wide { aspect-ratio: 21 / 9; }

.image-frame--dark::before {
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 239, 231, 0.1) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(0deg, rgba(244, 239, 231, 0.1) 0 1px, transparent 1px 24px);
}

.image-frame--dark::after { border-color: rgba(244, 239, 231, 0.14); }

/* ========== 11. Prose & Breadcrumb ========== */
.prose { font-size: 16px; line-height: 1.85; }

.prose p + p { margin-top: 1em; }

.prose a {
  text-decoration: underline;
  text-decoration-color: var(--clay);
  text-underline-offset: 4px;
}

.prose a:hover { color: var(--terracotta); text-decoration-color: currentColor; }

.prose ul { list-style: none; }

.prose ul li { position: relative; padding-left: 1.2em; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .8em;
  width: 8px;
  height: 8px;
  background: var(--terracotta);
}

.prose h3 {
  font-family: var(--font-title);
  font-size: 22px;
  margin-top: 1.6em;
  margin-bottom: .5em;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--rock);
  padding: 16px 0;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--rock);
}

.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--sage); }
.breadcrumb a { color: var(--rock); }
.breadcrumb a:hover { color: var(--terracotta); }
.breadcrumb [aria-current="page"] { color: var(--terracotta); }

/* ========== 12. Skip Link & Scroll Progress ========== */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 200;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 18px;
  font-size: 14px;
  border: 2px solid var(--signal-orange);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--signal-orange);
  z-index: 300;
}

/* ========== 13. Header ========== */
.site-header { position: relative; background: var(--bg); }

.utility-bar {
  background: var(--ink);
  color: var(--sage);
  font-family: var(--font-data);
  font-size: 12px;
}

.utility-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 6px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.utility-item { display: inline-flex; align-items: center; }
.utility-item--status { color: var(--sage); }
.utility-item--data { color: var(--data-green); letter-spacing: .08em; }

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--data-green);
  margin-right: 8px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .35; transform: scale(.7); }
}

.masthead {
  position: relative;
  background: var(--bg);
  border-bottom: 1px solid var(--rock);
}

.masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, transparent 0 63px, rgba(26, 25, 23, 0.05) 63px 64px),
    repeating-linear-gradient(0deg, transparent 0 39px, rgba(26, 25, 23, 0.05) 39px 40px);
  pointer-events: none;
}

.masthead-inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 30px 24px 20px;
  text-align: center;
}

.masthead-kicker {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--terracotta);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  color: var(--ink);
}

.brand:hover { color: var(--ink); }

.brand-mark {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 44px;
  line-height: 1.1;
  letter-spacing: .06em;
}

.brand-mark::after {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--signal-orange);
  margin-left: 8px;
  vertical-align: top;
}

.brand-tagline {
  font-size: 14px;
  letter-spacing: .32em;
  color: var(--rock);
  margin-top: 4px;
  padding-left: .32em;
}

.masthead-edition {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--rock);
  margin-top: 10px;
}

.header-rule { border-top: 4px double var(--ink); }

.nav-wrap { background: var(--bg); }

.main-nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 6px;
  counter-reset: nav;
}

.nav-item { text-align: center; counter-increment: nav; }

.nav-item::before {
  content: "0" counter(nav);
  display: block;
  font-family: var(--font-data);
  font-size: 10px;
  line-height: 1;
  color: var(--terracotta);
  margin-bottom: 2px;
}

.nav-link {
  display: inline-block;
  padding: 8px 16px 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--ink);
  border-bottom: 3px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.nav-link:hover {
  color: var(--terracotta);
  border-bottom-color: var(--clay);
}

.nav-link[aria-current="page"] {
  color: var(--terracotta);
  border-bottom-color: var(--terracotta);
}

.nav-toggle { display: none; }

@media (max-width: 767px) {
  .nav-wrap { border-bottom: 1px solid var(--rock); }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: var(--ink);
    color: var(--bg);
    border: 0;
    padding: 12px 24px;
    cursor: pointer;
    transition: background .2s ease;
  }

  .nav-toggle:hover { background: var(--terracotta); }

  .nav-toggle-bars {
    display: block;
    position: relative;
    width: 18px;
    height: 2px;
    background: currentColor;
    box-shadow: 0 6px 0 currentColor, 0 12px 0 currentColor;
  }

  .nav-toggle-label { font-size: 14px; letter-spacing: .16em; }

  .main-nav {
    display: none;
    padding: 8px 16px 16px;
  }

  .main-nav[data-open] { display: block; }

  .nav-list {
    flex-direction: column;
    gap: 0;
    background: var(--paper-dark);
    border: 1px solid var(--rock);
  }

  .nav-item { border-bottom: 1px solid var(--rock); }
  .nav-item:last-child { border-bottom: 0; }
  .nav-item::before { display: none; }

  .nav-link {
    display: block;
    text-align: left;
    padding: 12px 14px;
    border-left: 3px solid transparent;
    border-bottom: 0;
  }

  .nav-link[aria-current="page"] { border-left-color: var(--terracotta); }
}

@media (max-width: 479px) {
  .masthead-inner { padding: 20px 16px 16px; }
  .brand-mark { font-size: 32px; }
  .brand-tagline { letter-spacing: .18em; padding-left: .18em; }
}

/* ========== 14. Footer ========== */
.site-footer {
  background: var(--paper-dark);
  border-top: 4px double var(--ink);
}

.footer-top { padding: 48px 0 24px; }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 32px 24px;
}

.footer-brand,
.footer-col { grid-column: span 12; }

@media (min-width: 768px) {
  .footer-brand { grid-column: span 12; }
  .footer-col { grid-column: span 4; }
}

@media (min-width: 1024px) {
  .footer-brand { grid-column: span 4; }
  .footer-col--nav,
  .footer-col--legal { grid-column: span 2; }
  .footer-col--contact { grid-column: span 4; }
}

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

.brand--footer .brand-mark { font-size: 26px; }

.brand--footer .brand-mark::after {
  width: 7px;
  height: 7px;
  margin-left: 6px;
}

.brand--footer .brand-tagline {
  font-size: 12px;
  letter-spacing: .24em;
  padding-left: .24em;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--rock);
  margin-top: 12px;
  max-width: 320px;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ink);
  margin-bottom: 14px;
}

.footer-heading::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--terracotta);
  flex: none;
}

.footer-links { list-style: none; }

.footer-links li + li { margin-top: 8px; }

.footer-links a {
  font-size: 14px;
  color: var(--rock);
}

.footer-links a:hover {
  color: var(--moss);
  text-decoration: underline;
  text-decoration-color: var(--clay);
  text-underline-offset: 4px;
}

.footer-contact-list { list-style: none; }

.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--rock);
  line-height: 1.6;
}

.footer-contact-list li + li { margin-top: 10px; }

.contact-label {
  flex: none;
  width: 32px;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: .04em;
  color: var(--moss);
  background: var(--bg);
  border: 1px solid var(--rock);
  border-radius: 2px;
  padding: 1px 4px;
  text-align: center;
  margin-top: 3px;
}

.footer-mid {
  background: var(--bg);
  border-top: 1px solid var(--rock);
  border-bottom: 1px solid var(--rock);
  padding: 16px 0;
}

.footer-trust {
  font-size: 12px;
  line-height: 1.6;
  color: var(--rock);
}

.footer-trust::before {
  content: "声明";
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--terracotta);
  border: 1px solid var(--terracotta);
  border-radius: 2px;
  padding: 0 6px;
  margin-right: 10px;
}

.footer-bottom {
  background: var(--ink);
  color: var(--sage);
  font-family: var(--font-data);
  font-size: 12px;
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.footer-copy,
.footer-icp { color: var(--sage); }

.back-to-top {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .08em;
  background: transparent;
  border: 1px solid var(--sage);
  color: var(--data-green);
  padding: 6px 14px;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.back-to-top:hover {
  background: var(--signal-orange);
  border-color: var(--signal-orange);
  color: var(--ink);
}

@media (max-width: 767px) {
  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ========== 15. Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .pulse-dot { animation: none; }
  html.js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .btn,
  .nav-link,
  .nav-toggle,
  .tab-button,
  .card,
  .back-to-top { transition: none; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}