:root {
  --color-primary: #0b3d2e;
  --color-gold: #d4af37;
  --color-gold-light: #f0d08b;
  --color-bg: #1e1e1e;
  --color-bg-raised: #2c2c2c;
  --color-accent: #ff6b35;
  --color-text: #e8e8e8;
  --color-text-muted: #c9b98c;
  --color-success: #2ecc71;
  --color-danger: #e74c3c;
  --font-heading: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Source Serif Pro", "Songti SC", serif;
  --font-data: "Roboto Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-pill: 999px;
  --shadow: 0 16px 32px rgba(0, 0, 0, 0.25);
  --container: 1200px;
}

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

[hidden] {
  display: none !important;
}

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.75;
}

main {
  display: block;
}

#main-content {
  scroll-margin-top: 1rem;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: #fff;
  line-height: 1.2;
  margin-top: 0;
}

p {
  margin-top: 0;
}

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

a:hover {
  color: var(--color-gold-light);
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font: inherit;
}

ul, ol {
  padding-left: 1.2rem;
}

::selection {
  background: var(--color-gold);
  color: #1e1e1e;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  width: min(100% - clamp(1rem, 4vw, 2.5rem), var(--container));
  margin-inline: auto;
}

.section {
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
}

.section--tight {
  padding-block: clamp(2rem, 4vw, 3.5rem);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

.split__main {
  min-width: 0;
}

.split__side {
  position: sticky;
  top: 2rem;
}

.tilt-band {
  position: relative;
  padding: 1rem 0;
}

.tilt-band::after {
  content: "";
  display: block;
  height: 4px;
  margin-top: 1rem;
  background: linear-gradient(90deg, var(--color-gold), var(--color-accent));
  transform: skewY(-1.5deg);
  transform-origin: left;
}

.site-header {
  position: relative;
  z-index: 20;
  background: linear-gradient(135deg, #0b3d2e 0%, #0b3d2e 55%, #1e1e1e 100%);
  color: var(--color-text-muted);
}

.site-header__inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.site-header__meta {
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
  padding-block: 0.35rem;
}

.site-header__meta .site-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.site-header__tagline {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold-light);
}

.site-header__contact {
  margin: 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.site-header__contact-item + .site-header__contact-item::before {
  content: "·";
  margin-inline: 0.5rem;
  color: var(--color-gold);
}

.site-header__bar {
  position: relative;
  padding-block: 0.8rem;
}

.site-header__bar .site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.site-header__bar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 8px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-accent) 100%);
  transform: skewY(-1.4deg);
  transform-origin: left;
  pointer-events: none;
  z-index: 1;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: #fff;
}

.site-brand:hover {
  color: var(--color-gold-light);
}

.site-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.9rem 0.9rem 0.9rem 0.2rem;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
  color: #1e1e1e;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: -0.02em;
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.site-brand__name-en {
  font-family: var(--font-data);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-gold-light);
  line-height: 1.4;
}

.site-nav {
  position: static;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__list a {
  display: block;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-pill);
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.site-nav__list a:hover {
  background: rgba(212, 175, 55, 0.12);
  color: var(--color-gold-light);
}

.site-nav__list a[aria-current="page"] {
  background: var(--color-gold);
  color: #1e1e1e;
}

.site-nav__close {
  display: none;
}

.site-nav__foot {
  display: none;
}

.site-nav-toggle {
  display: none;
}

@media (max-width: 768px) {
  .site-nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0.6rem;
    background: rgba(212, 175, 55, 0.08);
    border: 1px solid rgba(212, 175, 55, 0.4);
    border-radius: 12px;
    cursor: pointer;
  }

  .site-nav-toggle__bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-gold);
    border-radius: 2px;
    transition: transform 0.25s, opacity 0.25s;
  }

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

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

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

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(24rem, 85vw);
    background: #1e1e1e;
    border-left: 2px solid var(--color-gold);
    padding: 2rem 1.5rem;
    overflow-y: auto;
    transform: translateX(105%);
    transition: transform 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
    box-shadow: none;
    z-index: 1000;
  }

  .site-nav[data-open] {
    transform: translateX(0);
    box-shadow: -20px 0 40px rgba(0, 0, 0, 0.5);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    margin-top: 3.5rem;
  }

  .site-nav__list a {
    padding: 0.9rem 1rem;
    border-radius: 14px;
    font-size: 1.05rem;
  }

  .site-nav__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
    background: rgba(212, 175, 55, 0.12);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: 50%;
    color: var(--color-gold-light);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
  }

  .site-nav__foot {
    display: block;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(212, 175, 55, 0.25);
    font-size: 0.8rem;
  }
}

.no-scroll {
  overflow: hidden;
}

.site-footer {
  position: relative;
  background: var(--color-primary);
  color: var(--color-text-muted);
  margin-top: clamp(3rem, 8vw, 6rem);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
  background: linear-gradient(270deg, var(--color-gold) 0%, var(--color-accent) 100%);
  transform: skewY(1.2deg);
  transform-origin: right;
  pointer-events: none;
}

.site-footer__inner {
  max-width: var(--container);
  margin-inline: auto;
  padding: 3rem clamp(1rem, 4vw, 2rem) 1.5rem;
}

.site-footer__brand {
  max-width: 36rem;
}

.site-footer__logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.site-footer__logo span {
  display: block;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold-light);
  font-weight: 400;
}

.site-footer__desc {
  font-size: 0.95rem;
}

.site-footer__trust {
  background: rgba(212, 175, 55, 0.12);
  border-left: 3px solid var(--color-gold);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  color: var(--color-text);
  font-size: 0.9rem;
  line-height: 1.6;
}

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.site-footer__title {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(212, 175, 55, 0.25);
}

.site-footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__col li + li {
  margin-top: 0.5rem;
}

.site-footer__col a {
  color: var(--color-text-muted);
}

.site-footer__col a:hover {
  color: var(--color-gold-light);
}

.site-footer__contact {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.site-footer__contact li {
  line-height: 1.8;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(212, 175, 55, 0.25);
  font-size: 0.85rem;
}

.site-footer__bottom p {
  margin: 0;
}

.section-head {
  max-width: 52rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.eyebrow,
.section-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 0.75rem;
}

.eyebrow::before,
.section-head__eyebrow::before {
  content: "";
  width: 2rem;
  height: 3px;
  background: var(--color-gold);
  border-radius: var(--radius-pill);
}

.section-head__title {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: #fff;
  line-height: 1.15;
}

.section-head__desc {
  margin-top: 0.75rem;
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

.lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
}

.text-data {
  font-family: var(--font-data);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

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

.panel {
  background: var(--color-bg-raised);
  border: 1px solid rgba(212, 175, 55, 0.16);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: var(--shadow);
}

.panel--flat {
  background: transparent;
  box-shadow: none;
  border-color: rgba(212, 175, 55, 0.1);
}

.panel--elevated {
  background: linear-gradient(145deg, #2c2c2c, #232323);
}

.panel__title {
  margin-top: 0;
  font-size: 1.25rem;
}

.data-card {
  background: var(--color-bg);
  border: 1px solid rgba(212, 175, 55, 0.22);
  border-radius: 20px;
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.data-card::after {
  content: "";
  position: absolute;
  right: -20px;
  top: -20px;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.22), transparent 70%);
  pointer-events: none;
}

.data-card__label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.data-card__value {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  line-height: 1.1;
  color: var(--color-gold-light);
  font-weight: 700;
}

.data-card__trend {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--color-success);
}

.data-card__trend.is-down {
  color: var(--color-danger);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.tag--gold {
  background: rgba(212, 175, 55, 0.15);
  color: var(--color-gold-light);
  border-color: rgba(212, 175, 55, 0.35);
}

.tag--orange {
  background: rgba(255, 107, 53, 0.15);
  color: #ffb48a;
  border-color: rgba(255, 107, 53, 0.4);
}

.tag--green {
  background: rgba(46, 204, 113, 0.12);
  color: #7ee2a5;
  border-color: rgba(46, 204, 113, 0.3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.2s;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--color-gold);
  color: #1e1e1e;
}

.btn--primary:hover {
  background: var(--color-gold-light);
  color: #1e1e1e;
}

.btn--ghost {
  background: transparent;
  border-color: rgba(212, 175, 55, 0.5);
  color: var(--color-gold-light);
}

.btn--ghost:hover {
  background: rgba(212, 175, 55, 0.1);
  color: #fff;
}

.btn--data {
  background: var(--color-accent);
  color: #1e1e1e;
}

.btn--data:hover {
  background: #ff8558;
  color: #1e1e1e;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

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

.index-list__item + .index-list__item {
  border-top: 1px solid rgba(212, 175, 55, 0.15);
}

.index-list__link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 0;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-weight: 600;
  text-decoration: none;
}

.index-list__link::after {
  content: "→";
  color: var(--color-gold);
  font-family: var(--font-data);
  transition: transform 0.2s;
}

.index-list__link:hover {
  color: var(--color-gold-light);
}

.index-list__link:hover::after {
  transform: translateX(4px);
}

.expand-group {
  margin-top: 1rem;
}

.expand-item {
  background: var(--color-bg-raised);
  border: 1px solid rgba(212, 175, 55, 0.16);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.expand-item__trigger {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 1rem 1.25rem;
  background: transparent;
  border: 0;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  text-align: left;
}

.expand-item__trigger::after {
  content: "+";
  font-family: var(--font-data);
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-gold);
  transition: transform 0.25s;
}

.expand-item[data-open] .expand-item__trigger::after {
  transform: rotate(45deg);
}

.expand-item__panel {
  padding: 0 1.25rem 1.15rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.expand-item__panel[hidden] {
  display: none;
}

.media-frame {
  position: relative;
  display: block;
  background: linear-gradient(135deg, var(--color-primary), var(--color-bg));
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.media-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.media-frame--ratio-4-3::before {
  padding-top: 75%;
}

.media-frame--ratio-1-1::before {
  padding-top: 100%;
}

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

.media-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--color-gold-light);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.media-frame__placeholder::before {
  content: "◈";
  font-size: 1.5rem;
  color: var(--color-gold);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  font-family: var(--font-heading);
  font-size: 0.8rem;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--color-gold);
}

.breadcrumb__link {
  color: var(--color-gold-light);
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: #fff;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  background: var(--color-gold);
  color: #1e1e1e;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-pill);
  z-index: 2000;
  font-family: var(--font-heading);
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 1rem;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-accent));
  z-index: 1000;
  pointer-events: none;
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
  }

  .split__side {
    position: static;
  }
}

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

@media (max-width: 560px) {
  .site-header__contact {
    display: none;
  }
}

@media (max-width: 480px) {
  .site-footer__cols {
    grid-template-columns: 1fr;
  }
}

@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;
  }

  .site-nav {
    transition: none;
  }
}