:root {
  --color-primary: #E7C766;
  --color-primary-deep: #B8963C;
  --color-bg: #0D0D0F;
  --color-bg-raised: #1A1A1E;
  --color-bg-footer: #242429;
  --color-accent: #FF8C42;
  --color-text: #F5F0E6;
  --color-muted: #A8A8B0;
  --color-danger: #E06A20;
  --gold-alpha: rgba(231,199,102,0.22);
  --gold-soft: rgba(231,199,102,0.12);
  --sans: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --serif: "Noto Serif SC", "SimSun", serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --header-h: 76px;
  --container-max: 1280px;
  --edge: clamp(20px, 4vw, 56px);
  --radius: 24px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  padding-top: var(--header-h);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--sans);
  font-weight: 800;
  line-height: 1.2;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

ul[class],
ol[class] {
  list-style: none;
  padding-left: 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-text);
}

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

::selection {
  background: rgba(231, 199, 102, 0.35);
  color: var(--color-bg);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 12px);
  outline: none;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1200;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--color-primary);
  color: var(--color-bg);
  font: 700 14px/1 var(--sans);
  transform: translateY(-220%);
  transition: transform 0.3s var(--ease);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(13, 13, 15, 0.82);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(13, 13, 15, 0.94);
  border-bottom-color: rgba(184, 150, 60, 0.5);
}

.header-inner {
  position: relative;
  height: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding: 0 var(--edge);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  font: 800 24px/1 var(--sans);
  letter-spacing: 0.06em;
}

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

.brand-mark {
  position: relative;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border-radius: 14px 10px 14px 10px;
  background: conic-gradient(from 220deg at 50% 50%, var(--color-primary), var(--color-primary-deep) 35%, transparent 35% 65%, var(--color-primary) 65%);
  box-shadow: inset 0 0 0 1px rgba(245, 240, 230, 0.14), 0 0 20px rgba(231, 199, 102, 0.16);
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--color-bg) 0 30%, transparent 31%);
  border: 1px solid rgba(245, 240, 230, 0.35);
}

.brand-mark--small {
  width: 26px;
  height: 26px;
  border-radius: 9px 7px 9px 7px;
}

.brand-mark--small::before {
  inset: 5px;
}

.brand-text {
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-item {
  margin: 0;
}

.nav-link {
  position: relative;
  display: block;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--color-muted);
  font: 500 15px/1.2 var(--sans);
  letter-spacing: 0.02em;
  transition: color 0.25s, background 0.25s, box-shadow 0.25s;
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--gold-soft);
}

.nav-link[aria-current="page"] {
  color: var(--color-primary);
  background: rgba(231, 199, 102, 0.1);
  box-shadow: inset 0 0 0 1px rgba(231, 199, 102, 0.28);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 5px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 2;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-deep), var(--color-primary) 55%, var(--color-accent));
  transform-origin: 0 50%;
  transform: scaleX(0);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid rgba(231, 199, 102, 0.35);
  border-radius: 999px;
  background: rgba(26, 26, 30, 0.6);
  color: var(--color-text);
  font: 500 14px/1 var(--sans);
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--color-primary);
  background: var(--gold-soft);
}

.nav-toggle__box {
  position: relative;
  width: 16px;
  height: 12px;
}

.nav-toggle__box::before,
.nav-toggle__box::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 0.3s var(--ease), top 0.3s var(--ease), bottom 0.3s var(--ease);
}

.nav-toggle__box::before {
  top: 0;
}

.nav-toggle__box::after {
  bottom: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__box::before {
  top: 5px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__box::after {
  bottom: 5px;
  transform: rotate(-45deg);
}

.nav-toggle__text {
  font-weight: 700;
}

.site-footer {
  background: var(--color-bg-footer);
  border-top: 1px solid rgba(184, 150, 60, 0.5);
  color: var(--color-muted);
}

.footer-inner {
  max-width: 1440px;
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--edge) 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.8fr;
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.footer-brand {
  display: grid;
  gap: 14px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  color: var(--color-text);
  font: 800 22px/1 var(--sans);
  letter-spacing: 0.05em;
}

.footer-note {
  max-width: 42ch;
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.9;
}

.footer-contact,
.footer-links-block {
  display: grid;
  gap: 12px;
}

.footer-title {
  margin: 0 0 4px;
  color: var(--color-primary);
  font: 700 14px/1.4 var(--sans);
  letter-spacing: 0.12em;
}

.footer-contact p {
  margin: 0;
  font-size: 14px;
  line-height: 2;
  color: var(--color-muted);
}

.footer-links {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-block;
  color: var(--color-muted);
  font: 400 14px/1.6 var(--serif);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.footer-links a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary-deep);
}

.footer-fine {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: clamp(32px, 6vw, 56px);
  padding-top: 20px;
  border-top: 1px solid rgba(245, 240, 230, 0.08);
  color: var(--color-muted);
  font: 400 12px/1.8 var(--mono);
}

.footer-fine p {
  margin: 0;
}

.container {
  width: min(calc(100% - 2 * var(--edge)), var(--container-max));
  margin-inline: auto;
}

.daf-section {
  display: grid;
  grid-template-columns: minmax(0, 0.618fr) minmax(0, 2.382fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: start;
  width: min(calc(100% - 2 * var(--edge)), var(--container-max));
  margin-inline: auto;
  padding: clamp(64px, 8vw, 116px) 0;
}

.daf-section--wide {
  grid-template-columns: 1fr;
}

.daf-section__note {
  position: sticky;
  top: calc(var(--header-h) + 28px);
  padding-left: 16px;
  border-left: 1px solid var(--color-primary-deep);
  color: var(--color-muted);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.9;
  letter-spacing: 0.04em;
}

.daf-section__body {
  min-width: 0;
}

.daf-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--color-primary);
  font: 700 13px/1 var(--mono);
  letter-spacing: 0.18em;
}

.daf-kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--color-primary-deep);
}

.daf-title {
  margin: 0 0 20px;
  color: var(--color-text);
  font: 800 clamp(34px, 6vw, 72px)/1.08 var(--sans);
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.daf-title em {
  font-style: normal;
  color: var(--color-primary);
}

.daf-lede {
  max-width: 58ch;
  margin: 0 0 28px;
  color: var(--color-text);
  font-family: var(--serif);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.9;
}

a.daf-btn,
button.daf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--color-primary);
  color: var(--color-bg);
  font: 700 15px/1 var(--sans);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

a.daf-btn:hover,
button.daf-btn:hover {
  background: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(231, 199, 102, 0.12);
}

a.daf-btn--ghost,
button.daf-btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: rgba(231, 199, 102, 0.45);
}

a.daf-btn--ghost:hover,
button.daf-btn--ghost:hover {
  background: rgba(231, 199, 102, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: none;
}

.daf-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  color: var(--color-muted);
  font-family: var(--mono);
  font-size: 13px;
}

.daf-breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.daf-breadcrumb li + li::before {
  content: "/";
  color: var(--color-primary-deep);
}

.daf-breadcrumb a {
  color: var(--color-primary);
}

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

.daf-breadcrumb li[aria-current="page"] {
  color: var(--color-text);
  font-weight: 700;
}

.daf-card {
  position: relative;
  display: block;
  overflow: hidden;
  padding: 26px;
  border: 1px solid rgba(184, 150, 60, 0.18);
  border-radius: 28px 28px 28px 12px;
  background: linear-gradient(160deg, rgba(231, 199, 102, 0.12), transparent 38%), var(--color-bg-raised);
  transition: transform 0.35s var(--ease), border-color 0.35s, background 0.35s;
}

.daf-card:hover,
.daf-card:focus-within {
  transform: translateY(-5px);
  border-color: rgba(231, 199, 102, 0.42);
  background: linear-gradient(160deg, rgba(231, 199, 102, 0.18), transparent 42%), #1E1E23;
}

.daf-card__title {
  margin: 0 0 8px;
  color: var(--color-text);
  font: 800 19px/1.35 var(--sans);
}

.daf-card__meta {
  margin-bottom: 10px;
  color: var(--color-accent);
  font: 500 12px/1.4 var(--mono);
  letter-spacing: 0.06em;
}

.daf-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.85;
}

.daf-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin: 26px 0;
}

.daf-metric {
  display: grid;
  gap: 8px;
  padding: 22px;
  border: 1px solid rgba(231, 199, 102, 0.16);
  border-radius: 22px;
  background: var(--color-bg-raised);
}

.daf-metric strong {
  color: var(--color-primary);
  font-family: var(--mono);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.1;
}

.daf-metric span {
  color: var(--color-muted);
  font: 500 13px/1.4 var(--sans);
  letter-spacing: 0.04em;
}

.daf-visual {
  position: relative;
  min-height: 300px;
  overflow: hidden;
  border: 1px solid rgba(231, 199, 102, 0.14);
  border-radius: 36px 36px 36px 12px;
  background: linear-gradient(135deg, rgba(231, 199, 102, 0.16), transparent 60%), var(--color-bg-raised);
}

.daf-visual::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -90px;
  width: 340px;
  height: 340px;
  border-radius: 46% 54% 52% 48%;
  background: radial-gradient(circle at 30% 30%, rgba(231, 199, 102, 0.34), transparent 65%);
  transform: rotate(24deg);
}

.daf-visual::after {
  content: "";
  position: absolute;
  left: 12%;
  bottom: 12%;
  width: 90px;
  height: 90px;
  border: 1px solid rgba(255, 140, 66, 0.55);
  border-radius: 42% 58% 48% 52%;
  box-shadow: 24px -14px 0 -10px rgba(231, 199, 102, 0.18);
}

.daf-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid rgba(184, 150, 60, 0.2);
  border-radius: 28px 28px 28px 12px;
  background: var(--color-bg-raised);
}

.daf-media--wide {
  aspect-ratio: 16 / 8;
}

.daf-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.daf-timeline {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0 0 0 24px;
  list-style: none;
  border-left: 1px solid var(--color-primary-deep);
}

.daf-timeline__item {
  position: relative;
  padding: 0 0 24px;
}

.daf-timeline__item:last-child {
  padding-bottom: 0;
}

.daf-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(231, 199, 102, 0.16);
}

.daf-timeline__time {
  display: block;
  margin-bottom: 6px;
  color: var(--color-accent);
  font: 500 12px/1.4 var(--mono);
  letter-spacing: 0.08em;
}

.daf-timeline__title {
  margin-bottom: 6px;
  color: var(--color-text);
  font: 800 18px/1.3 var(--sans);
}

.daf-timeline__desc {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.85;
}

.daf-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.daf-list li {
  position: relative;
  padding-left: 22px;
  color: var(--color-muted);
  font-family: var(--serif);
}

.daf-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-primary);
  transform: rotate(45deg);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

@media (max-width: 980px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 820px) {
  :root {
    --header-h: 64px;
  }

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

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 12px;
    right: 12px;
    display: block;
    padding: 12px;
    border: 1px solid rgba(231, 199, 102, 0.22);
    border-radius: 24px;
    background: rgba(26, 26, 30, 0.98);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-6px);
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    border-radius: 14px;
    padding: 14px 16px;
  }
}

@media (max-width: 720px) {
  .daf-section {
    grid-template-columns: 1fr;
  }

  .daf-section__note {
    position: static;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-fine {
    flex-direction: column;
  }
}

@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;
  }

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

  .daf-card:hover,
  .daf-card:focus-within,
  a.daf-btn:hover,
  button.daf-btn:hover,
  .nav-link:hover {
    transform: none;
  }
}