/* =============================================
   NG娱乐官网CN 全站共享样式  /assets/site.css
   ============================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --color-primary: #12082E;
  --color-secondary: #1D1045;
  --color-card: rgba(33, 26, 74, 0.85);
  --color-text: #F5F2FF;
  --color-text-muted: #B8AEE0;
  --color-gold-start: #FFD36E;
  --color-gold-end: #F5A524;
  --color-cyan: #00E5FF;
  --color-success: #4DFFC3;
  --color-alert: #FF6B6B;
  --color-border: #3A2D6B;
  --color-light: #EAD9FF;
  --font-headline: "Orbitron", "Noto Sans SC", sans-serif;
  --font-body: "Inter", "Noto Sans SC", sans-serif;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-md: 20px;
  --text-lg: 28px;
  --text-xl: 40px;
  --text-xxl: 64px;
  --header-h: 72px;
  --container-w: 1200px;
  --radius-s: 8px;
  --radius-m: 16px;
  --radius-l: 24px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
}

@media (max-width: 640px) {
  :root {
    --header-h: 60px;
  }
}

/* ---------- 2. Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-primary);
  background-image:
    radial-gradient(circle at 15% 25%, rgba(0, 229, 255, 0.05) 0%, transparent 45%),
    radial-gradient(circle at 90% 10%, rgba(255, 211, 110, 0.04) 0%, transparent 35%);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: block;
  flex: 1 0 auto;
  padding-top: var(--header-h);
}

a {
  color: var(--color-cyan);
}

button {
  font-family: inherit;
}

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

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  line-height: 1.15;
  color: var(--color-text);
  font-weight: 700;
}

h1 {
  font-size: var(--text-xl);
  letter-spacing: 0.02em;
}

h2 {
  font-size: var(--text-lg);
}

p {
  margin-bottom: 1em;
}

/* ---------- 4. 焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

/* ---------- 5. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}

.section--tight {
  padding: 40px 0;
}

.section__head {
  max-width: 720px;
  margin-bottom: 40px;
}

.section__eyebrow {
  color: var(--color-cyan);
  font-family: var(--font-headline);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section__title {
  font-size: var(--text-lg);
  font-weight: 900;
  margin: 12px 0 8px;
}

.section__note {
  color: var(--color-text-muted);
  font-size: 15px;
}

.hero-under-header {
  margin-top: calc(-1 * var(--header-h));
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn--gold {
  background: linear-gradient(135deg, var(--color-gold-start), var(--color-gold-end));
  color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(245, 165, 36, 0.25);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(245, 165, 36, 0.4);
}

.btn--ghost {
  border-color: var(--color-border);
  color: var(--color-text);
  background: transparent;
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

/* ---------- 7. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 10px 20px;
  background: var(--color-cyan);
  color: var(--color-primary);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-24px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.skip-link:focus,
.skip-link:focus-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  outline-offset: 4px;
}

/* ---------- 8. 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-gold-start), var(--color-gold-end), var(--color-cyan));
  z-index: 1001;
  border-radius: 0 2px 2px 0;
  pointer-events: none;
  transition: width 0.1s linear;
}

/* ---------- 9. 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  background: linear-gradient(to bottom, rgba(18, 8, 46, 0.85) 0%, rgba(18, 8, 46, 0.35) 100%);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(18, 8, 46, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  border-bottom-color: rgba(58, 45, 107, 0.6);
}

.site-header__inner {
  max-width: var(--container-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

/* ---------- 10. 品牌 ---------- */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-brand__mark {
  display: inline-flex;
  filter: drop-shadow(0 0 8px rgba(255, 211, 110, 0.35));
}

.site-brand__svg {
  width: 42px;
  height: 42px;
}

.site-brand__name {
  background: linear-gradient(135deg, var(--color-gold-start), var(--color-gold-end));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 17px;
  letter-spacing: 0.08em;
  font-weight: 900;
}

/* ---------- 11. 导航 ---------- */
.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.site-nav__link {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-cyan);
  background: rgba(0, 229, 255, 0.1);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.2);
  outline: none;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold-start);
  background: rgba(255, 211, 110, 0.1);
  box-shadow: inset 0 0 0 1px rgba(255, 211, 110, 0.35);
}

/* ---------- 12. CTA ---------- */
.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--color-gold-start), var(--color-gold-end));
  color: var(--color-primary);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header__cta:hover,
.site-header__cta:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(245, 165, 36, 0.4);
  outline: none;
}

.site-header__cta--topbar {
  display: inline-flex;
}

.site-header__cta--nav,
.site-nav__item--cta {
  display: none;
}

/* ---------- 13. 汉堡按钮 ---------- */
.site-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color var(--transition-fast);
}

.site-nav-toggle:hover {
  border-color: var(--color-cyan);
}

.site-nav-toggle__bar {
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.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);
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  background:
    radial-gradient(circle at 85% 20%, rgba(0, 229, 255, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(255, 211, 110, 0.04) 0%, transparent 35%),
    linear-gradient(to bottom, var(--color-secondary), var(--color-primary));
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  padding-top: 64px;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold-start), var(--color-gold-end), transparent);
  opacity: 0.7;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 1.1fr;
  gap: 48px;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__statement {
  margin-top: 20px;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.site-footer__trust {
  margin-top: 12px;
  color: rgba(184, 174, 224, 0.75);
  font-size: var(--text-xs);
  line-height: 1.6;
  padding-left: 12px;
  border-left: 2px solid rgba(255, 211, 110, 0.4);
}

.site-footer__title {
  font-family: var(--font-headline);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-gold-start);
  text-transform: uppercase;
  margin: 0 0 20px;
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__list a,
.site-footer__list span {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 15px;
  transition: color var(--transition-fast);
}

.site-footer__list a:hover,
.site-footer__list a:focus-visible {
  color: var(--color-cyan);
  outline: none;
}

.site-footer__note {
  margin-top: 16px;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  line-height: 1.6;
  border-top: 1px dashed var(--color-border);
  padding-top: 12px;
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 32px 0 24px;
  border-top: 1px solid var(--color-border);
  margin-top: 56px;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.site-footer__copy,
.site-footer__icp {
  margin: 0;
}

/* ---------- 15. 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid rgba(255, 211, 110, 0.4);
  background: linear-gradient(135deg, rgba(255, 211, 110, 0.2), rgba(245, 165, 36, 0.2));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-gold-start);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base), box-shadow var(--transition-base);
  z-index: 90;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top.is-visible:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(255, 211, 110, 0.35);
}

/* ---------- 16. 面包屑 ---------- */
.breadcrumb {
  padding: 16px 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.breadcrumb__item:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--color-border);
}

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

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--color-cyan);
  outline: none;
}

.breadcrumb__current {
  color: var(--color-text);
  font-weight: 500;
}

/* ---------- 17. 卡片 ---------- */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-l);
  padding: 28px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 24px rgba(0, 229, 255, 0.05);
}

.card__title {
  font-size: var(--text-md);
  margin-bottom: 8px;
}

.card__text {
  color: var(--color-text-muted);
  font-size: 15px;
}

/* ---------- 18. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.25);
}

.tag--gold {
  background: rgba(255, 211, 110, 0.08);
  border-color: rgba(255, 211, 110, 0.3);
  color: var(--color-gold-start);
}

.tag--green {
  background: rgba(77, 255, 195, 0.08);
  border-color: rgba(77, 255, 195, 0.25);
  color: var(--color-success);
}

.tag--red {
  background: rgba(255, 107, 107, 0.08);
  border-color: rgba(255, 107, 107, 0.25);
  color: var(--color-alert);
}

/* ---------- 19. 网格 ---------- */
.grid {
  display: grid;
  gap: 32px;
}

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

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

/* ---------- 20. 非对称编辑网格 ---------- */
.editorial-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2.5fr;
  gap: 32px 48px;
}

/* ---------- 21. 图片容器 ---------- */
.img-frame {
  position: relative;
  border-radius: var(--radius-l);
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 30%, rgba(0, 229, 255, 0.12) 0%, transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(255, 211, 110, 0.10) 0%, transparent 50%),
    var(--color-secondary);
  border: 1px solid var(--color-border);
}

.img-frame::before {
  content: "";
  display: block;
  padding-bottom: 56.25%;
}

.img-frame--abstract::before {
  padding-bottom: 75%;
}

.img-frame__inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  color: var(--color-text-muted);
  font-family: var(--font-headline);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- 22. 时间轴 ---------- */
.timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-gold-start), var(--color-gold-end));
  opacity: 0.35;
}

.timeline__item {
  position: relative;
  padding-left: 36px;
  padding-bottom: 32px;
}

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

.timeline__item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-cyan);
  box-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
}

/* ---------- 23. 响应式：平板 & 移动 ---------- */
@media (max-width: 960px) {
  .site-header__inner {
    gap: 12px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 12px;
    right: 12px;
    background: rgba(18, 8, 46, 0.97);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    padding: 12px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    display: block;
    padding: 14px 18px;
    font-size: 16px;
    border-radius: var(--radius-m);
  }

  .site-nav__item--cta {
    display: block;
    border-top: 1px solid var(--color-border);
    padding-top: 10px;
    margin-top: 10px;
  }

  .site-header__cta--nav {
    display: flex;
    width: 100%;
    margin-top: 8px;
  }

  .site-header__cta--topbar {
    display: none;
  }

  .site-nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

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

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

  .editorial-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-brand__name {
    font-size: 15px;
  }

  .site-brand__svg {
    width: 38px;
    height: 38px;
  }

  .site-header__inner {
    padding: 0 16px;
    gap: 8px;
  }

  .section {
    padding: 48px 0;
  }

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

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    margin-top: 40px;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }

  .container {
    padding: 0 16px;
  }
}

/* ---------- 24. 减少动效 ---------- */
@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;
    transition-delay: 0ms !important;
  }

  .scroll-progress {
    transition: none;
  }

  .back-to-top,
  .back-to-top.is-visible {
    transition: none;
  }
}