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

* {
  margin: 0;
}

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

body {
  font-family: 'Noto Sans SC', 'Heiti SC', 'Microsoft YaHei', sans-serif;
  background-color: #F5EFE1;
  color: #2C2C2C;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  display: block;
  flex: 1;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font: inherit;
  border: 0;
  background: none;
  cursor: pointer;
  color: inherit;
}

:root {
  --color-gold: #D4AF37;
  --color-gold-bright: #F1C40F;
  --color-navy: #1B2A4A;
  --color-navy-light: #2C3E50;
  --color-navy-deep: #14213D;
  --color-red: #C0392B;
  --color-paper: #F5EFE1;
  --color-ink: #2C2C2C;
  --color-muted: #7F8C8D;
  --color-beige: #B0A695;
  --gradient-gold: linear-gradient(135deg, #D4AF37, #F1C40F);
  --gradient-navy: linear-gradient(135deg, #1B2A4A, #2C3E50);
  --font-heading: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'Heiti SC', 'Microsoft YaHei', sans-serif;
  --font-digit: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
  --container: 1280px;
}

/* ---------- 通用布局与排版 ---------- */

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 2rem);
  width: 100%;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-ink);
}

.page-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: 0.02em;
}

.eyebrow {
  font-family: var(--font-digit);
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--color-gold);
}

.section {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.section--dark {
  background: var(--color-navy);
  color: var(--color-paper);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--color-paper);
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.7rem 1.4rem;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  background: transparent;
  transition: background 200ms ease, color 200ms ease, transform 200ms ease;
}

.btn:hover {
  background: rgba(212, 175, 55, 0.08);
}

.btn--gold {
  background: var(--gradient-gold);
  border-color: transparent;
  color: var(--color-navy-deep);
}

.btn--gold:hover {
  box-shadow: 0 4px 14px rgba(212, 175, 55, 0.35);
  transform: translateY(-1px);
}

/* ---------- 面包屑 ---------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
  padding-block: 1rem 1.5rem;
  font-family: var(--font-digit);
}

.breadcrumb a {
  color: var(--color-muted);
  transition: color 200ms ease;
}

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

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

.breadcrumb__sep {
  color: var(--color-beige);
}

/* ---------- 卡片、标签、Bento 网格 ---------- */

.card {
  background: #FFFFFF;
  border: 1px solid var(--color-beige);
  padding: 1.5rem;
}

.tag {
  display: inline-block;
  font-family: var(--font-digit);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-red);
  border: 1px solid rgba(192, 57, 43, 0.35);
  padding: 0.25rem 0.6rem;
}

.grid-bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.25rem;
}

.grid-bento__item {
  grid-column: span 4;
}

.grid-bento__item--wide {
  grid-column: span 8;
}

/* ---------- 图片占位容器 ---------- */

.media {
  position: relative;
  overflow: hidden;
  background: #E8E0CE;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.media--portrait {
  aspect-ratio: 3 / 4;
}

.media--square {
  aspect-ratio: 1 / 1;
}

.media__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-muted);
  background:
    linear-gradient(rgba(27, 42, 74, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 42, 74, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

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

/* ---------- 标签页 ---------- */

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid var(--color-beige);
  margin-bottom: 1.5rem;
}

.tabs__tab {
  padding: 0.75rem 1.25rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--color-muted);
  border-bottom: 2px solid transparent;
  transition: color 200ms ease, border-color 200ms ease;
}

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

.tabs__tab.is-active {
  color: var(--color-navy);
  border-bottom-color: var(--color-gold);
}

.tabs__panel[hidden] {
  display: none;
}

/* ---------- 折叠面板 ---------- */

details.accordion {
  border: 1px solid var(--color-beige);
  background: #FFFFFF;
}

details.accordion summary {
  list-style: none;
  font-family: var(--font-heading);
  padding: 0.9rem 1.2rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 200ms ease;
}

details.accordion summary::-webkit-details-marker {
  display: none;
}

details.accordion summary:hover {
  color: var(--color-gold);
}

details.accordion summary::after {
  content: "+";
  font-family: var(--font-digit);
  font-size: 1.2rem;
  color: var(--color-gold);
}

details.accordion[open] summary::after {
  content: "–";
}

details.accordion .accordion__body {
  padding: 0 1.2rem 1.2rem;
  font-size: 0.92rem;
  color: var(--color-muted);
}

/* ---------- 滚动显现 ---------- */

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ---------- 屏幕阅读器专用 ---------- */

.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;
}

/* ---------- 跳过链接 ---------- */

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 2000;
  background: var(--color-navy-deep);
  color: #FFFFFF;
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  transition: top 200ms ease;
}

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

/* ---------- 页头 ---------- */

.site-header {
  position: relative;
  z-index: 500;
  box-shadow: 0 1px 0 var(--color-beige), 0 4px 18px rgba(27, 42, 74, 0.2);
}

.header-topbar {
  background: var(--color-paper);
  border-bottom: 1px solid rgba(176, 166, 149, 0.5);
  font-size: 0.8rem;
  color: var(--color-muted);
}

.header-topbar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 34px;
  gap: 1rem;
}

.header-topbar__tagline {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  letter-spacing: 0.12em;
  color: var(--color-navy);
}

.header-topbar__tagline::before {
  content: "◆";
  color: var(--color-gold);
  font-size: 0.7rem;
}

.header-topbar__meta {
  font-family: var(--font-digit);
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

.header-topbar__dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  transform: rotate(45deg);
  margin-right: 0.4rem;
}

.header-main {
  background:
    linear-gradient(rgba(212, 175, 55, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.05) 1px, transparent 1px),
    linear-gradient(135deg, #1B2A4A 0%, #2C3E50 100%);
  background-size: 32px 32px, 32px 32px, auto;
  border-bottom: 1px solid rgba(212, 175, 55, 0.35);
}

.header-main__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 78px;
  padding-block: 0.75rem;
}

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

.brand__crown {
  color: var(--color-gold);
  flex: 0 0 auto;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: #FFFFFF;
}

.brand__sub {
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  color: rgba(245, 239, 225, 0.72);
  text-transform: uppercase;
}

.header-main__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-actions__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(245, 239, 225, 0.9);
  transition: color 200ms ease;
}

.header-actions__link::before {
  content: "◇";
  color: var(--color-gold);
  font-size: 0.8rem;
}

.header-actions__link:hover {
  color: var(--color-gold-bright);
}

.header-actions__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-gold);
  color: var(--color-navy-deep);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.55rem 1.25rem;
  border: 1px solid transparent;
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.header-actions__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(212, 175, 55, 0.35);
}

.site-nav {
  background: var(--color-navy-deep);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  gap: 1.5rem;
}

.site-nav__index {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  color: rgba(212, 175, 55, 0.9);
}

.site-nav__index::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--color-gold);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  display: inline-block;
  padding: 0.7rem 0.9rem;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  color: rgba(245, 239, 225, 0.84);
  border-bottom: 2px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.site-nav__link:hover {
  color: var(--color-gold-bright);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold-bright);
  border-bottom-color: var(--color-gold);
}

.site-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid rgba(212, 175, 55, 0.5);
  background: transparent;
}

.site-nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-gold);
  transition: transform 200ms ease, opacity 200ms ease;
}

.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(1) {
  transform: translateY(7px) rotate(45deg);
}

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

/* ---------- 页脚 ---------- */

.site-footer {
  background: linear-gradient(135deg, #14213D, #1B2A4A 55%, #2C3E50);
  color: rgba(245, 239, 225, 0.8);
  position: relative;
  margin-top: 3rem;
}

.site-footer__deco {
  position: relative;
  height: 56px;
  background-color: var(--color-navy-deep);
  clip-path: polygon(
    0% 0%,
    100% 0%,
    100% 72%,
    91% 60%,
    80% 70%,
    70% 42%,
    58% 64%,
    48% 32%,
    36% 68%,
    26% 46%,
    16% 78%,
    8% 64%,
    0% 74%
  );
  margin-top: -1px;
}

.site-footer__deco-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-gold);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
  gap: 2.5rem;
  padding-block: 3.5rem 2rem;
}

.site-footer__crown {
  color: var(--color-gold);
  margin-bottom: 0.75rem;
}

.site-footer__slogan {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-gold-bright);
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.site-footer__desc {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(245, 239, 225, 0.68);
}

.site-footer__heading {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(212, 175, 55, 0.28);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.site-footer__links a {
  color: rgba(245, 239, 225, 0.78);
  font-size: 0.9rem;
  transition: color 180ms ease, padding-left 180ms ease;
}

.site-footer__links a:hover {
  color: var(--color-gold-bright);
  padding-left: 6px;
}

.site-footer__contact-line {
  font-size: 0.9rem;
  color: rgba(245, 239, 225, 0.72);
  line-height: 1.8;
}

.site-footer__bottom {
  border-top: 1px solid rgba(212, 175, 55, 0.22);
  background: rgba(10, 15, 30, 0.6);
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding-block: 1rem;
  font-family: var(--font-digit);
  font-size: 0.8rem;
  color: rgba(245, 239, 225, 0.55);
}

/* ---------- 焦点可见性 ---------- */

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

.site-nav__toggle:focus-visible,
.btn:focus-visible,
.header-actions__btn:focus-visible {
  outline-color: var(--color-gold);
}

/* ---------- 响应式：平板与手机 ---------- */

@media (max-width: 899px) {
  .site-header {
    position: sticky;
    top: 0;
  }

  .header-topbar {
    display: none;
  }

  .header-main__inner {
    min-height: 60px;
  }

  .brand__name {
    font-size: 1.1rem;
  }

  .brand__sub {
    font-size: 0.62rem;
  }

  .brand__crown {
    width: 28px;
    height: 22px;
  }

  .header-actions__link {
    font-size: 0.78rem;
  }

  .header-actions__btn {
    font-size: 0.78rem;
    padding: 0.4rem 0.8rem;
  }

  .site-nav__toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: 60px;
    right: 0;
    bottom: 0;
    width: min(78vw, 340px);
    z-index: 1500;
    background: linear-gradient(135deg, #14213D, #1B2A4A 70%);
    border-left: 1px solid rgba(212, 175, 55, 0.4);
    border-bottom: 0;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 260ms ease, visibility 260ms ease;
    box-shadow: -16px 0 40px rgba(0, 0, 0, 0.35);
  }

  .site-nav[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
  }

  .site-nav__inner {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    min-height: 100%;
    padding: 2rem 1.5rem;
  }

  .site-nav__index {
    margin-bottom: 1rem;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0;
  }

  .site-nav__list li {
    border-bottom: 1px solid rgba(212, 175, 55, 0.12);
  }

  .site-nav__link {
    display: block;
    padding: 0.9rem 0.25rem;
    font-size: 1rem;
    border-bottom: 0;
    color: rgba(245, 239, 225, 0.9);
  }

  .site-nav__link[aria-current="page"] {
    padding-left: 0.75rem;
    border-left: 3px solid var(--color-gold);
    border-bottom: 0;
  }

  body.has-menu-open::after {
    content: "";
    position: fixed;
    inset: 60px 0 0 0;
    background: rgba(10, 15, 30, 0.4);
    z-index: 1400;
  }

  .grid-bento__item,
  .grid-bento__item--wide {
    grid-column: 1 / -1;
  }

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

  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 559px) {
  .brand__sub {
    display: none;
  }

  .header-actions__link::before {
    display: none;
  }

  .header-actions__link {
    letter-spacing: 0;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    padding-block: 2.5rem 1.5rem;
  }

  .site-footer__brand {
    grid-column: auto;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-footer__deco {
    height: 36px;
  }
}

/* ---------- 动画减弱 ---------- */

@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;
  }

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

  .site-nav {
    transition: none !important;
  }
}