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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: #E6E6E6;
  background-color: #0B0B0F;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  list-style: none;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: Didot, "Playfair Display", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Songti SC", "Noto Serif CJK SC", SimSun, serif;
  font-weight: 300;
  line-height: 1.25;
  color: #FFFFFF;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  letter-spacing: 0.04em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: 0.04em;
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  letter-spacing: 0.03em;
}

h4 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

p {
  max-width: 60ch;
}

strong, b {
  font-weight: 700;
}

::selection {
  background: rgba(212, 175, 55, 0.3);
  color: #FFFFFF;
}

:focus-visible {
  outline: 2px solid #D4AF37;
  outline-offset: 2px;
  border-radius: 2px;
}

:root {
  --color-gold: #D4AF37;
  --color-gold-light: #FCE68A;
  --color-gold-gradient: linear-gradient(135deg, #D4AF37, #FCE68A);
  --color-black: #0B0B0F;
  --color-black-soft: #12121A;
  --color-red: #8B0000;
  --color-silver: #C0C0C0;
  --color-body: #E6E6E6;
  --color-muted: #A0A0A0;
  --color-border: rgba(212, 175, 55, 0.4);
  --font-serif: Didot, "Playfair Display", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Songti SC", "Noto Serif CJK SC", SimSun, serif;
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-w: 1200px;
  --header-h: 76px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-gold: 0 4px 24px rgba(212, 175, 55, 0.25);
}

.container {
  width: min(100% - 2rem, var(--container-w));
  margin-inline: auto;
}

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

/* === 按钮 === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn--primary {
  background: linear-gradient(135deg, #D4AF37, #FCE68A);
  color: #0B0B0F;
  font-weight: 600;
  box-shadow: var(--shadow-gold);
  padding: 0.85rem 2rem;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(212, 175, 55, 0.4);
}

.btn--ghost {
  border: 1px solid rgba(212, 175, 55, 0.5);
  background: transparent;
  color: #D4AF37;
  padding: 0.85rem 2rem;
}

.btn--ghost:hover {
  background: rgba(212, 175, 55, 0.1);
  border-color: #D4AF37;
  color: #FCE68A;
}

/* === 面包屑 === */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

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

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

.breadcrumb__sep {
  color: rgba(255, 255, 255, 0.3);
}

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

/* === 段落区块 === */
.section {
  padding: var(--space-lg) 0;
}

.section__head {
  margin-bottom: var(--space-md);
}

.section__title {
  margin-bottom: var(--space-xs);
}

.section__lead {
  color: var(--color-muted);
  font-size: 1.05rem;
  max-width: 50ch;
}

/* === 网格 === */
.grid {
  display: grid;
  gap: var(--space-md);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* === 图片容器 === */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: #12121A;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.img-frame::before {
  content: "";
  display: block;
  padding-bottom: 66.666%;
}

.img-frame--square::before {
  padding-bottom: 100%;
}

.img-frame--portrait::before {
  padding-bottom: 125%;
}

.img-frame img,
.img-frame > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.img-frame:hover img {
  transform: scale(1.03);
}

/* === 步骤列表 === */
.step-list {
  counter-reset: step;
  display: grid;
  gap: var(--space-md);
}

.step-list__item {
  position: relative;
  counter-increment: step;
  padding-left: 4rem;
}

.step-list__item::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  font-family: Didot, "Playfair Display", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  font-size: 1.05rem;
  color: #D4AF37;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.06);
}

.step-list__item h3,
.step-list__item h4 {
  margin-bottom: 0.35rem;
}

.step-list__item p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* === 时间线 === */
.timeline {
  position: relative;
  padding-left: 1.75rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 1px;
  background: linear-gradient(180deg, #D4AF37, rgba(212, 175, 55, 0.08));
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-md);
}

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

.timeline__item::before {
  content: "";
  position: absolute;
  left: -1.8rem;
  top: 0.5rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #D4AF37;
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

.timeline__time {
  display: inline-block;
  font-family: Didot, "Playfair Display", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  font-size: 0.85rem;
  color: #D4AF37;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.timeline__title {
  margin-bottom: 0.35rem;
}

.timeline__desc {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* === 皇冠徽标 === */
.crown-mark {
  display: block;
  width: 26px;
  height: 20px;
  background: linear-gradient(135deg, #D4AF37 0%, #FCE68A 100%);
  clip-path: polygon(0 100%, 0 35%, 20% 60%, 50% 0, 80% 60%, 100% 35%, 100% 100%);
  filter: drop-shadow(0 1px 4px rgba(212, 175, 55, 0.6));
}

.crown-mark--lg {
  width: 36px;
  height: 28px;
  filter: drop-shadow(0 2px 6px rgba(212, 175, 55, 0.5));
}

/* === 跳过链接 === */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1200;
  background: linear-gradient(135deg, #D4AF37, #FCE68A);
  color: #0B0B0F;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  border-radius: 0 0 4px 0;
  box-shadow: var(--shadow-gold);
}

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

/* === 头部导航 === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 11, 15, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.site-header__inner {
  width: min(100% - 2rem, var(--container-w));
  margin-inline: auto;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: #FFFFFF;
  transition: color var(--transition-fast);
  flex-shrink: 0;
}

.site-brand:hover {
  color: #D4AF37;
}

.site-brand__icon {
  display: grid;
  place-items: center;
}

.site-brand__text {
  font-family: Didot, "Playfair Display", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Songti SC", "Noto Serif CJK SC", SimSun, serif;
  font-size: 1.35rem;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 4px;
  color: #D4AF37;
  background: transparent;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  flex-shrink: 0;
}

.nav-toggle:hover {
  border-color: #D4AF37;
  background: rgba(212, 175, 55, 0.06);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 22px;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle__label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
}

.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__list {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2rem);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.25rem;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--color-body);
  transition: color var(--transition-fast);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, #D4AF37, #FCE68A);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.site-nav__link:hover {
  color: #D4AF37;
}

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

.site-nav__link[aria-current="page"] {
  color: #D4AF37;
}

.site-nav__link--cta {
  border: 1px solid rgba(212, 175, 55, 0.5);
  border-radius: 2px;
  padding: 0.55rem 1.25rem;
  margin-left: 0.25rem;
  color: #D4AF37;
  transition: background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.site-nav__link--cta::after {
  display: none;
}

.site-nav__link--cta:hover,
.site-nav__link--cta[aria-current="page"] {
  background: linear-gradient(135deg, #D4AF37, #FCE68A);
  border-color: transparent;
  color: #0B0B0F;
  box-shadow: 0 4px 16px rgba(212, 175, 55, 0.35);
}

/* === 页脚 === */
.site-footer {
  position: relative;
  margin-top: var(--space-xl);
  background: linear-gradient(180deg, #0B0B0F 0%, #0D0D15 100%);
  border-top: 1px solid rgba(212, 175, 55, 0.25);
  box-shadow: 0 -4px 24px rgba(212, 175, 55, 0.05);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 2rem;
  right: 5%;
  width: 200px;
  height: 150px;
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.05), rgba(212, 175, 55, 0.01));
  clip-path: polygon(0 100%, 0 35%, 20% 60%, 50% 0, 80% 60%, 100% 35%, 100% 100%);
  pointer-events: none;
}

.site-footer__inner {
  width: min(100% - 2rem, var(--container-w));
  margin-inline: auto;
  padding: var(--space-lg) 0 0;
  position: relative;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.2fr 2fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(212, 175, 55, 0.12);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-xs);
}

.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: #FFFFFF;
  font-family: Didot, "Playfair Display", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Songti SC", "Noto Serif CJK SC", SimSun, serif;
  font-size: 1.35rem;
  letter-spacing: 0.1em;
  transition: color var(--transition-fast);
  margin-bottom: 0.5rem;
}

.site-footer__logo:hover {
  color: #D4AF37;
}

.site-footer__logo-text {
  white-space: nowrap;
}

.site-footer__slogan {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
}

.site-footer__slogan--sub {
  font-size: 0.8rem;
  color: rgba(160, 160, 160, 0.8);
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.site-footer__nav-title {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: #D4AF37;
  margin-bottom: var(--space-sm);
}

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

.site-footer__nav-link {
  font-size: 0.9rem;
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.site-footer__nav-link:hover {
  color: #D4AF37;
}

.site-footer__contact {

}

.site-footer__contact-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.site-footer__contact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 5px;
  height: 5px;
  border: 1px solid #D4AF37;
  transform: rotate(45deg);
  opacity: 0.6;
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  flex-wrap: wrap;
}

.site-footer__copy {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.site-footer__icp {
  font-size: 0.85rem;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

/* === 滚动显现 === */
.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* === 响应式 === */
@media (min-width: 1440px) {
  html {
    font-size: 17px;
  }
}

@media (max-width: 960px) {
  h1 {
    font-size: clamp(2.4rem, 6vw, 3.2rem);
  }

  .section {
    padding: var(--space-md) 0;
  }

  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  :root {
    --header-h: 60px;
  }

  .site-header__inner {
    height: auto;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(11, 11, 15, 0.98);
    border-bottom: 1px solid rgba(212, 175, 55, 0.25);
    padding: 0.5rem 1rem 1rem;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
  }

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

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

  .site-nav__item + .site-nav__item {
    margin-top: 0;
  }

  .site-nav__link {
    display: block;
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid rgba(212, 175, 55, 0.12);
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    color: #FCE68A;
    background: rgba(212, 175, 55, 0.05);
  }

  .site-nav__link--cta {
    margin: 0.75rem 0 0;
    text-align: center;
    border: 1px solid rgba(212, 175, 55, 0.5);
    border-radius: 2px;
    padding: 0.75rem 0.5rem;
    color: #D4AF37;
    background: transparent;
  }

  .site-nav__link--cta:hover,
  .site-nav__link--cta[aria-current="page"] {
    background: linear-gradient(135deg, #D4AF37, #FCE68A);
    color: #0B0B0F;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .site-footer__nav {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .section {
    padding: var(--space-md) 0;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .site-footer__nav {
    grid-template-columns: 1fr;
  }

  .site-footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .site-brand__text {
    font-size: 1.2rem;
  }
}

/* === 减少动态效果 === */
@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-enabled [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .site-nav {
    transition: none;
  }
}