/* ================================================
   皇冠竞界 · 全站共享样式
   设计基底：深蓝 × 金色 · 粗野主义 · 等宽索引
   ================================================ */

/* ---------- 0. 重置与变量 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* 品牌色 */
  --color-royal-blue: #0A1F3D;
  --color-royal-blue-light: #163A69;
  --color-royal-blue-dark: #051020;
  --color-gold: #C9A96A;
  --color-gold-bright: #E8C87A;
  --color-accent-orange: #FF7A1A;
  --color-accent-purple: #B83AC8;
  --color-text-primary: #F0F4FA;
  --color-text-secondary: #A8B8D0;
  --color-background: #0B1422;
  --color-surface: #112036;
  --color-border: #26456E;

  /* 字体 */
  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-mono: 'Roboto Mono', 'SF Mono', 'Cascadia Code', 'Consolas', 'Courier New', monospace;

  /* 布局 */
  --container-max: 1320px;
  --container-pad: 24px;
  --header-h: 64px;

  /* 形状与材质 */
  --radius: 10px;
  --shadow-hard: 12px 12px 0 rgba(0, 0, 0, 0.35);
  --shadow-soft: 0 20px 60px rgba(0, 0, 0, 0.35);

  /* 间距 */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;

  color-scheme: dark;
}

@media (min-width: 980px) {
  :root {
    --container-pad: 32px;
    --header-h: 76px;
  }
}

html {
  scroll-behavior: smooth;
  scrollbar-color: var(--color-border) var(--color-royal-blue-dark);
}

body {
  background-color: var(--color-background);
  background-image:
    radial-gradient(ellipse at 85% -10%, rgba(184, 58, 200, 0.08), transparent 55%),
    radial-gradient(ellipse at -5% 110%, rgba(201, 169, 106, 0.07), transparent 50%);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
  text-wrap: balance;
}

::selection {
  background: rgba(201, 169, 106, 0.32);
  color: #ffffff;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-gold-bright);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 1. 布局与页面容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.site-page {
  position: relative;
  overflow: clip;
}

.site-page__inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.site-page__header {
  position: relative;
  padding: var(--space-6) 0;
  background: linear-gradient(180deg, rgba(10, 31, 61, 0.35), transparent 72%);
  border-bottom: 1px solid var(--color-border);
}

.site-page__title {
  font-size: clamp(38px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-2);
}

.site-page__lead {
  max-width: 700px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

#main-content {
  min-height: 70vh;
  padding-top: var(--header-h);
}

/* ---------- 2. 章节与标题 ---------- */
.site-section {
  position: relative;
  padding: clamp(56px, 7vw, 88px) 0;
  border-bottom: 1px solid rgba(38, 69, 110, 0.55);
}

.site-section__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.site-section__inner--narrow {
  max-width: 920px;
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.section-heading__index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  white-space: nowrap;
}

.section-heading__index::after {
  content: '';
  display: inline-block;
  width: 40px;
  height: 1px;
  background: var(--color-gold);
  vertical-align: middle;
  margin-left: 12px;
}

.section-heading__title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
}

/* ---------- 3. 按钮、标签、卡片 ---------- */
.site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  border: 2px solid var(--color-gold);
  color: var(--color-gold-bright);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
  line-height: 1;
  padding: 13px 26px;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.15s ease;
}

.site-btn:hover {
  background: var(--color-gold);
  color: var(--color-royal-blue-dark);
  border-color: var(--color-gold);
  box-shadow: 0 8px 30px rgba(201, 169, 106, 0.25);
}

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

.site-btn--gold {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-royal-blue-dark);
}

.site-btn--gold:hover {
  background: var(--color-gold-bright);
  border-color: var(--color-gold-bright);
  color: var(--color-royal-blue-dark);
  box-shadow: 0 8px 36px rgba(232, 200, 122, 0.35);
}

.site-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  background: rgba(22, 58, 105, 0.25);
}

.site-tag--gold {
  border-color: var(--color-gold);
  color: var(--color-gold-bright);
  background: rgba(201, 169, 106, 0.08);
}

.site-tag--purple {
  border-color: var(--color-accent-purple);
  color: var(--color-gold-bright);
  background: rgba(184, 58, 200, 0.1);
}

.site-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-hard);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.site-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  border-color: rgba(201, 169, 106, 0.6);
}

/* ---------- 4. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: var(--space-4) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
}

.breadcrumbs__link {
  transition: color 0.25s ease;
}

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

.breadcrumbs__sep::before {
  content: '/';
  color: var(--color-gold);
  margin: 0 4px;
}

.breadcrumbs__current {
  color: var(--color-gold);
}

/* ---------- 5. 富文本 ---------- */
.prose {
  font-size: 16px;
  line-height: 1.85;
  color: #DCE6F5;
}

.prose p {
  margin-bottom: 1.2em;
}

.prose a {
  color: var(--color-gold-bright);
  text-decoration: underline;
  text-decoration-color: rgba(232, 200, 122, 0.4);
  text-underline-offset: 4px;
}

.prose strong {
  color: var(--color-gold-bright);
}

.prose h2 {
  font-size: 24px;
  margin-top: 2.2em;
  margin-bottom: 0.8em;
}

.prose h3 {
  font-size: 19px;
  margin-top: 1.8em;
  margin-bottom: 0.6em;
}

.prose ul,
.prose ol {
  padding-left: 1.2em;
  margin-bottom: 1.2em;
}

.prose ul {
  list-style: square;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin-bottom: 0.4em;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: rgba(22, 58, 105, 0.5);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 6px;
}

/* ---------- 6. 视觉工具 ---------- */
.bg-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(38, 69, 110, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 69, 110, 0.12) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.85) 0%, transparent 75%);
  mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.85) 0%, transparent 75%);
}

.visual-frame {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-hard);
}

.visual-frame::before {
  content: '';
  display: block;
  padding-top: 56.25%;
}

.visual-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse at 25% 20%, rgba(184, 58, 200, 0.15), transparent 55%),
    radial-gradient(ellipse at 80% 80%, rgba(201, 169, 106, 0.12), transparent 50%),
    linear-gradient(135deg, var(--color-royal-blue), var(--color-royal-blue-dark));
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
}

/* ---------- 7. 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* ---------- 8. 可访问性跳转链接 ---------- */
.site-skip {
  position: fixed;
  top: -200px;
  left: 20px;
  z-index: 2000;
  background: var(--color-gold-bright);
  color: var(--color-royal-blue-dark);
  font-weight: 800;
  font-size: 14px;
  padding: 12px 24px;
  border-radius: 0 0 10px 10px;
  box-shadow: var(--shadow-hard);
  transition: top 0.3s ease;
}

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

/* ---------- 9. CSS 皇冠图标 ---------- */
.site-crown {
  display: inline-block;
  flex-shrink: 0;
  position: relative;
  width: 34px;
  height: 26px;
}

.site-crown__rim {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 8px;
  border-radius: 2px 2px 0 0;
  background: linear-gradient(180deg, var(--color-gold-bright), var(--color-gold));
  box-shadow: 0 0 16px rgba(201, 169, 106, 0.35);
}

.site-crown__spike {
  position: absolute;
  bottom: 8px;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 12px solid var(--color-gold);
}

.site-crown__spike--a {
  left: 0;
}

.site-crown__spike--b {
  left: 50%;
  transform: translateX(-50%);
  border-bottom-color: var(--color-gold-bright);
}

.site-crown__spike--c {
  right: 0;
}

/* ---------- 10. 头部 ---------- */
.site-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  z-index: 3;
  background: linear-gradient(90deg, var(--color-gold-bright), var(--color-gold), var(--color-accent-orange));
  box-shadow: 0 0 12px rgba(232, 200, 122, 0.5);
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(5, 16, 32, 0.78);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.35s ease, box-shadow 0.35s ease;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(201, 169, 106, 0.65), transparent);
  z-index: 2;
  pointer-events: none;
}

.site-header.is-scrolled {
  background: rgba(5, 16, 32, 0.94);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}

.site-header__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* 品牌 */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  justify-self: start;
  color: var(--color-text-primary);
}

.site-brand__text {
  display: inline-flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1.2;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--color-text-primary);
  transition: color 0.3s ease;
}

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

.site-brand__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--color-gold);
  white-space: nowrap;
}

/* 导航 */
.site-nav {
  justify-self: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav__link {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  padding: 8px 2px;
  position: relative;
  transition: color 0.3s ease;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-accent-orange));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}

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

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

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

/* 头部 CTA */
.site-header__cta {
  justify-self: end;
  padding: 10px 22px;
  font-size: 13px;
}

/* 汉堡按钮 */
.site-nav-toggle {
  display: none;
  position: relative;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: rgba(22, 58, 105, 0.35);
  color: var(--color-text-primary);
  transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.site-nav-toggle:hover {
  border-color: var(--color-gold);
  box-shadow: 0 0 22px rgba(201, 169, 106, 0.2);
}

.site-nav-toggle__icon {
  position: relative;
  width: 20px;
  height: 14px;
  display: block;
}

.site-nav-toggle__bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: top 0.28s ease, transform 0.28s ease, opacity 0.28s ease;
}

.site-nav-toggle__bar:nth-child(1) {
  top: 0;
}

.site-nav-toggle__bar:nth-child(2) {
  top: 6px;
}

.site-nav-toggle__bar:nth-child(3) {
  top: 12px;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(1) {
  top: 6px;
  transform: 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) {
  top: 6px;
  transform: rotate(-45deg);
}

.site-nav-toggle__text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* ---------- 11. 移动端头部与导航 ---------- */
@media (max-width: 979px) {
  .site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .site-header__cta {
    display: none;
  }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 12px var(--container-pad) 24px;
    background: rgba(5, 16, 32, 0.96);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--color-border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  }

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

  .site-nav__list {
    display: grid;
    gap: 0;
  }

  .site-nav__item:last-child .site-nav__link {
    border-bottom: 0;
  }

  .site-nav__link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid rgba(38, 69, 110, 0.4);
  }

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

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

@media (max-width: 480px) {
  .site-brand__tag {
    display: none;
  }

  .site-brand__name {
    font-size: 18px;
  }

  .site-crown {
    transform: scale(0.9);
  }
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--color-royal-blue-dark);
  color: var(--color-text-primary);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-gold), var(--color-accent-orange), transparent);
  opacity: 0.8;
}

.site-footer__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-6) var(--container-pad) var(--space-4);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 0.8fr 1.2fr;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid rgba(38, 69, 110, 0.5);
  margin-bottom: var(--space-5);
}

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

.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-bottom: var(--space-2);
}

.site-footer__logo-text {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--color-text-primary);
}

.site-footer__tagline {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}

.site-footer__about {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 340px;
  margin-bottom: var(--space-2);
}

.site-footer__trust {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(168, 184, 208, 0.7);
  border-left: 2px solid var(--color-gold);
  padding-left: 12px;
  margin-top: var(--space-2);
  max-width: 360px;
}

.site-footer__nav {
  min-width: 0;
}

.site-footer__heading {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-gold-bright);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
}

.site-footer__links {
  display: grid;
  gap: 12px;
}

.site-footer__link {
  color: var(--color-text-secondary);
  font-size: 14px;
  transition: color 0.25s ease, padding-left 0.25s ease;
}

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

.site-footer__contact-list {
  display: grid;
  gap: var(--space-2);
}

.site-footer__contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-footer__contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.site-footer__contact-value {
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-secondary);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.site-footer__copyright {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(168, 184, 208, 0.6);
}

@media (max-width: 979px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

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

@media (max-width: 599px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

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

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

/* ---------- 13. Reduced Motion ---------- */
@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;
  }

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

  .site-card:hover {
    transform: none;
  }

  .site-nav[data-open] {
    transition: none;
  }
}