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

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

body {
  background: var(--bg-night);
  color: var(--text-paper);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

button {
  font: inherit;
}

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

/* ===== CSS Variables ===== */
:root {
  --bg-night: #0B0E14;
  --bg-panel: #151B23;
  --accent-orange: #FF7A00;
  --accent-red: #E5323E;
  --accent-gold: #D4AF37;
  --text-paper: #F5EBDD;
  --text-mist: #8A94A6;
  --data-green: #2ECC71;
  --data-yellow: #F1C40F;

  --font-display: "站酷酷黑", "Source Han Sans Heavy", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-body: "思源黑体", "Source Han Sans SC", "阿里巴巴普惠体", "Alibaba PuHuiTi", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Menlo, monospace;

  --content-max: 1280px;
  --content-gutter: 24px;
}

/* ===== Typography ===== */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--text-paper);
  line-height: 1.2;
  text-wrap: balance;
}

h1 {
  font-size: 5.2rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

h2 {
  font-size: 3.2rem;
  font-weight: 800;
}

h3 {
  font-size: 1.6rem;
  font-weight: 700;
}

p {
  color: var(--text-paper);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ===== Layout Container ===== */
.content-container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--content-gutter);
}

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

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.8rem 1.6rem;
  background: var(--accent-orange);
  color: var(--bg-night);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #ff8c24;
  transform: translateY(-2px);
}

.btn-primary--footer {
  margin-top: 1.2rem;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.7rem 1.4rem;
  background: transparent;
  color: var(--accent-gold);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  border: 1px solid var(--accent-gold);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(212, 175, 55, 0.08);
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1.6rem 2rem 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-mist);
}

.breadcrumb-link {
  color: var(--text-mist);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb-link:hover,
.breadcrumb-link:focus-visible {
  color: var(--accent-orange);
}

.breadcrumb-sep {
  color: var(--accent-gold);
  opacity: 0.7;
}

.breadcrumb-current {
  color: var(--text-paper);
  font-weight: 600;
}

/* ===== Section Title ===== */
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-paper);
  margin: 0 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.section-title::before {
  content: "";
  display: block;
  width: 12px;
  height: 12px;
  background: var(--accent-orange);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-gold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin: 0 0 0.6rem;
}

/* ===== Panel ===== */
.panel {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid rgba(138, 148, 166, 0.12);
  padding: 1.5rem;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

/* ===== Tag Chip ===== */
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.35rem 0.8rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-paper);
  background: transparent;
  border: 1px solid var(--accent-gold);
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

/* ===== Data Row ===== */
.data-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid rgba(138, 148, 166, 0.12);
}

.data-row:last-child {
  border-bottom: 0;
}

.data-label {
  color: var(--text-mist);
  font-size: 0.875rem;
}

.data-value {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-paper);
  white-space: nowrap;
}

/* ===== Index List ===== */
.index-list {
  counter-reset: idx;
}

.index-link {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid rgba(138, 148, 166, 0.1);
  color: var(--text-paper);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
  counter-increment: idx;
}

.index-link::before {
  content: counter(idx, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-gold);
}

.index-link:hover,
.index-link:focus-visible {
  color: var(--accent-orange);
  padding-left: 6px;
}

/* ===== Image Frame ===== */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--bg-panel);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.img-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-ratio-16x9::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.img-ratio-4x3::before {
  content: "";
  display: block;
  padding-top: 75%;
}

.img-ratio-1x1::before {
  content: "";
  display: block;
  padding-top: 100%;
}

/* ===== Header ===== */
.site-header {
  position: relative;
  background: var(--bg-night);
  color: var(--text-paper);
  border-bottom: 1px solid rgba(212, 175, 55, 0.18);
}

.site-header::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--accent-gold) 18%,
    var(--accent-orange) 50%,
    var(--accent-gold) 82%,
    transparent 100%);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1300;
  display: inline-block;
  padding: 0.75rem 1.2rem;
  background: var(--accent-orange);
  color: var(--bg-night);
  font-family: var(--font-display);
  font-weight: 800;
  text-decoration: none;
}

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

.header-topline {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 2rem 0.8rem;
}

.header-datestamp {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-mist);
}

.datestamp-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--data-green);
  box-shadow: 0 0 8px rgba(46, 204, 113, 0.6);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-paper);
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--accent-orange);
  color: var(--bg-night);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.35rem;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  box-shadow: 0 2px 18px rgba(255, 122, 0, 0.35);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.header-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

.search-shell {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 170px;
  padding: 0.5rem 0.8rem 0.5rem 2.2rem;
  background: var(--bg-panel);
  border: 1px solid rgba(138, 148, 166, 0.28);
  border-radius: 0;
  color: var(--text-paper);
  font-family: var(--font-body);
  font-size: 0.85rem;
  outline: none;
  transition: width 0.25s ease, border-color 0.25s ease;
}

.search-input::placeholder {
  color: rgba(138, 148, 166, 0.65);
}

.search-input:focus {
  width: 210px;
  border-color: var(--accent-orange);
}

.search-glyph {
  position: absolute;
  left: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border: 2px solid var(--text-mist);
  border-radius: 50%;
  pointer-events: none;
}

.search-glyph::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -3px;
  width: 6px;
  height: 2px;
  background: var(--text-mist);
  transform: rotate(45deg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(138, 148, 166, 0.3);
  border-radius: 0;
  color: var(--text-paper);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

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

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

.site-nav {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 2rem 0.4rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.55rem 0.25rem;
  color: var(--text-paper);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 8px;
  width: 100%;
  height: 2px;
  background: var(--accent-orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

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

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

.ticker {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: stretch;
  gap: 0.8rem;
  padding: 0 2rem 1.1rem;
}

.ticker::before {
  content: "";
  position: absolute;
  left: 2rem;
  top: 0;
  bottom: 0;
  width: 32px;
  background: linear-gradient(90deg, rgba(255, 122, 0, 0.25), transparent);
  z-index: 2;
  pointer-events: none;
}

.ticker::after {
  content: "";
  position: absolute;
  right: 2rem;
  top: 0;
  bottom: 0;
  width: 32px;
  background: linear-gradient(270deg, rgba(212, 175, 55, 0.22), transparent);
  z-index: 2;
  pointer-events: none;
}

.ticker-tag {
  flex-shrink: 0;
  align-self: center;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-orange);
  color: var(--bg-night);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

.ticker-viewport {
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 3%, #000 97%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 3%, #000 97%, transparent);
}

.ticker-track {
  display: inline-flex;
  align-items: center;
  gap: 3.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  white-space: nowrap;
  will-change: transform;
}

.ticker-item {
  font-size: 0.875rem;
  color: var(--text-paper);
}

.ticker-meta {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-mist);
  font-family: var(--font-mono);
}

@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-night);
  color: var(--text-paper);
  border-top: 1px solid rgba(212, 175, 55, 0.22);
  padding: 0 2rem 2rem;
}

.footer-main {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 3rem;
  padding: 3.2rem 0 2.5rem;
}

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

.brand-logo--footer {
  margin-bottom: 0.9rem;
}

.brand-logo--footer .brand-mark {
  width: 38px;
  height: 38px;
  font-size: 1.1rem;
}

.brand-logo--footer .brand-name {
  font-size: 1.4rem;
}

.footer-slogan {
  color: var(--text-mist);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 260px;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--accent-gold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}

.footer-nav {
  display: flex;
  flex-direction: column;
}

.footer-link {
  display: block;
  padding: 0.25rem 0;
  color: var(--text-mist);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
  font-size: 0.875rem;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--accent-orange);
  transform: translateX(3px);
}

.footer-contact .footer-link {
  display: inline-block;
  margin-bottom: 0.2rem;
}

.footer-address {
  margin-top: 0.6rem;
  font-style: normal;
  font-size: 0.875rem;
  color: var(--text-mist);
  line-height: 1.6;
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--data-green);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--data-green);
  box-shadow: 0 0 10px rgba(46, 204, 113, 0.5);
  display: inline-block;
}

.footer-note {
  font-size: 0.85rem;
  color: var(--text-mist);
  line-height: 1.6;
  max-width: 260px;
}

.footer-bottom {
  max-width: var(--content-max);
  margin: 0 auto;
  border-top: 1px solid rgba(138, 148, 166, 0.15);
  padding: 1.4rem 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-mist);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.footer-legal .footer-link {
  display: inline-block;
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid var(--accent-orange);
  border-radius: 0;
  color: var(--accent-orange);
  font-family: var(--font-body);
  font-size: 0.8rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.to-top:hover,
.to-top:focus-visible {
  background: var(--accent-orange);
  color: var(--bg-night);
}

/* ===== Scroll Progress ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1200;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-gold));
  pointer-events: none;
}

/* ===== Reveal ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.7s ease;
}

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

/* ===== Expandable ===== */
[data-expand-target] {
  display: none;
}

[data-expand-target][data-open] {
  display: block;
}

/* ===== Tablet ===== */
@media (min-width: 768px) and (max-width: 1023px) {
  .header-topline {
    padding: 1.2rem 1.5rem 0.7rem;
  }

  .search-input {
    width: 140px;
  }

  .search-input:focus {
    width: 170px;
  }

  .site-nav {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    gap: 1.2rem;
  }

  .ticker {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 2.4rem;
  }
}

/* ===== Mobile ===== */
@media (max-width: 767px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.2rem;
  }

  .header-topline {
    grid-template-columns: 1fr auto;
    padding: 0.9rem 1rem 0.6rem;
  }

  .header-datestamp {
    display: none;
  }

  .brand-logo {
    justify-self: start;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 1.1rem;
  }

  .brand-name {
    font-size: 1.3rem;
  }

  .search-shell {
    display: none;
  }

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

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    max-width: none;
    text-align: center;
    border-top: 1px solid rgba(138, 148, 166, 0.12);
    padding: 0.6rem 1rem;
  }

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

  .nav-link {
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid rgba(138, 148, 166, 0.08);
  }

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

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

  .ticker {
    padding: 0 1rem 0.8rem;
  }

  .ticker::before {
    left: 1rem;
  }

  .ticker::after {
    right: 1rem;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    padding: 2.4rem 0 1.8rem;
  }

  .site-footer {
    padding: 0 1.5rem 1.5rem;
  }

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

  .breadcrumb {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

/* ===== 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;
  }

  .ticker-track {
    animation: none !important;
  }

  .ticker-viewport {
    overflow-x: auto;
  }

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