/* ==========================================================
   MANBET 官方品牌站 · 共享样式表 /assets/site.css
   Design DNA: 海报式分层 · 命令栏导航 · 档案索引感
   ========================================================== */

/* ---------- 全局重置与基础变量 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* 色彩系统 - 深空蓝主调 */
  --color-space: #0A192F;
  --color-deep: #172A45;
  --color-action: #FF6B35;
  --color-silver: #C0C8D1;
  --color-snow: #F5F7FA;
  --color-pitch: #020C1B;
  --color-mist: #E6EDF2;
  --color-action-hover: #FF8C61;
  --color-ink: #0B1D2A;
  --color-ice: #CCE0FF;

  /* 字体层级 */
  --font-heading: "Rajdhani", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 字号与字重 */
  --text-hero: clamp(2.8rem, 8vw, 4.5rem);
  --text-h2: clamp(2rem, 4vw, 2.5rem);
  --text-h3: clamp(1.25rem, 2vw, 1.5rem);
  --text-body: 1rem;
  --text-note: 0.75rem;

  /* 间距与留白 */
  --space-xs: .5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  /* 容器宽度 */
  --container-max: 1280px;
  --container-gutter: 1.5rem;

  /* 过渡 */
  --ease: cubic-bezier(.22, 1, .36, 1);
  --speed: 300ms;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--color-pitch);
  background-color: var(--color-snow);
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

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

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

/* 无障碍辅助 */
.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;
}

/* ---------- 通用容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter);
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-weight: 500;
  letter-spacing: .02em;
  padding: .75rem 1.5rem;
  border-radius: 999px;
  transition: background-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease), transform 200ms var(--ease);
  text-align: center;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--color-action);
  color: var(--color-snow);
  box-shadow: 0 4px 20px rgba(255, 107, 53, .3);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-action-hover);
  box-shadow: 0 8px 32px rgba(255, 140, 97, .4);
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1px solid var(--color-silver);
  color: var(--color-space);
}

/* ---------- 品牌标识 ---------- */
.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1;
}

.brand-word {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: .05em;
  color: var(--color-snow);
}

.brand-mark {
  font-size: var(--text-note);
  font-weight: 400;
  margin-top: .25rem;
  color: var(--color-silver);
  letter-spacing: .1em;
}

/* ---------- 通用状态徽章 ---------- */
.badge {
  display: inline-block;
  font-size: var(--text-note);
  font-weight: 500;
  padding: .25rem .75rem;
  border-radius: 999px;
  background-color: var(--color-ink);
  color: var(--color-snow);
  letter-spacing: .05em;
}

.badge--accent {
  background-color: var(--color-action);
  color: var(--color-snow);
}

.badge--light {
  background-color: var(--color-ice);
  color: var(--color-ink);
}

/* ---------- 卡片系统 ---------- */
.card {
  background-color: var(--color-snow);
  border-radius: 12px;
  padding: var(--space-md) var(--space-lg);
  box-shadow: 0 2px 12px rgba(2, 12, 27, .05);
  transition: box-shadow var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.card:hover {
  box-shadow: 0 8px 24px rgba(2, 12, 27, .08);
  transform: translateY(-4px);
}

.card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-h3);
  color: var(--color-space);
  margin-bottom: .5rem;
}

.card-desc {
  color: var(--color-pitch);
  font-size: var(--text-body);
  opacity: .8;
}

.card-link {
  display: inline-block;
  margin-top: var(--space-sm);
  color: var(--color-action);
  font-weight: 500;
}

/* ---------- 章节标题 / 索引系统 ---------- */
.section {
  padding-block: var(--space-xl);
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-silver);
  padding-bottom: var(--space-sm);
}

.section-index {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-action);
  line-height: 1;
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-space);
  line-height: 1.2;
}

/* ---------- 表格系统 ---------- */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-body);
}

.table th {
  text-align: left;
  font-weight: 600;
  color: var(--color-snow);
  background-color: var(--color-space);
  padding: .75rem var(--space-sm);
  font-size: var(--text-note);
  letter-spacing: .05em;
  text-transform: uppercase;
}

.table td {
  padding: .75rem var(--space-sm);
  border-bottom: 1px solid var(--color-mist);
  color: var(--color-pitch);
}

.table tr:hover td {
  background-color: var(--color-ice);
}

/* ---------- 图片容器规则 ---------- */
.media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 12px;
  background:
    linear-gradient(135deg, var(--color-space) 0%, var(--color-deep) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-space);
}

.media img,
.media svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms var(--ease);
}

.media--portrait {
  aspect-ratio: 4 / 5;
}

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

/* ---------- 导航头部布局 ---------- */
.site-header {
  position: relative;
  background-color: var(--color-space);
  border-bottom: 1px solid rgba(192, 200, 209, .2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}

.reading-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: transparent;
  z-index: 10;
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background-color: var(--color-action);
  box-shadow: 0 0 12px rgba(255, 107, 53, .6);
}

.header-state {
  display: none;
  align-items: center;
  gap: .25rem;
  font-size: var(--text-note);
  color: var(--color-silver);
  letter-spacing: .05em;
  margin-left: auto;
  margin-right: var(--space-sm);
  font-weight: 500;
  padding: .25rem .5rem;
  border: 1px solid rgba(204, 224, 255, .4);
  border-radius: 999px;
}

.state-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #7fe5b8;
  box-shadow: 0 0 6px #7fe5b8;
}

/* 导航默认样式 */
.site-nav {
  display: none;
  width: 100%;
  flex-basis: 100%;
  border-top: 1px solid rgba(192, 200, 209, .2);
  padding-top: var(--space-sm);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  margin-bottom: var(--space-sm);
}

.nav-link {
  display: block;
  padding: .5rem .75rem;
  font-weight: 500;
  color: var(--color-snow);
  background-color: transparent;
  border-left: 2px solid transparent;
  transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  background-color: rgba(23, 42, 69, .6);
  color: var(--color-action-hover);
}

.nav-link[aria-current="page"] {
  border-left-color: var(--color-action);
  background-color: rgba(255, 107, 53, .1);
  color: var(--color-action);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: .75rem;
  border-radius: 8px;
  background-color: transparent;
  border: 1px solid rgba(192, 200, 209, .4);
}

.toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-snow);
  transition: transform var(--speed) var(--ease), opacity var(--speed) var(--ease);
}

.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 移动端展开状态 */
.site-nav[data-open="true"] {
  display: block;
}

.nav-cta {
  margin-top: var(--space-sm);
}

/* ---------- 页脚部分 ---------- */
.site-footer {
  background-color: var(--color-space);
  color: var(--color-silver);
  margin-top: var(--space-xl);
  padding-block: var(--space-lg) var(--space-sm);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.footer-brand .brand-word {
  color: var(--color-snow);
}

.footer-brand .brand-mark {
  color: var(--color-silver);
}

.footer-about {
  margin-top: var(--space-sm);
  max-width: 28rem;
  font-size: var(--text-body);
  opacity: .8;
}

.footer-title {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: 700;
  color: var(--color-snow);
  margin-bottom: var(--space-xs);
}

.footer-links li {
  margin-bottom: .5rem;
}

.footer-links a:hover {
  color: var(--color-action);
}

.footer-contact p,
.footer-status p {
  margin-top: .25rem;
  font-size: var(--text-body);
  opacity: .85;
}

.status-pill {
  display: inline-block;
  margin-top: var(--space-xs);
  padding: .5rem 1rem;
  background-color: rgba(23, 42, 69, .7);
  border: 1px solid rgba(192, 200, 209, .4);
  border-radius: 999px;
  font-size: var(--text-note);
  color: var(--color-snow);
  letter-spacing: .05em;
}

.footer-bottom {
  border-top: 1px solid rgba(192, 200, 209, .2);
  padding-top: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: .25rem;
  font-size: var(--text-note);
  color: var(--color-silver);
  opacity: .8;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: center;
  font-size: var(--text-note);
  padding-block: var(--space-sm);
  color: var(--color-silver);
}

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

/* ---------- 内容网格 ---------- */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.article-body > * + * {
  margin-top: 1.5em;
}

/* ---------- 目录组件 ---------- */
.toc {
  border-left: 4px solid var(--color-action);
  background-color: var(--color-mist);
  padding: var(--space-sm) var(--space-md);
  border-radius: 0 8px 8px 0;
}

.toc-title {
  font-family: var(--font-heading);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-space);
}

.toc-item {
  padding: .25rem 0;
}

.toc-item a:hover {
  color: var(--color-action);
}

/* ---------- 通用工具类 ---------- */
.text-center { text-align: center; }
.py-lg { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }
.mt-sm { margin-top: var(--space-sm); }
.mb-sm { margin-bottom: var(--space-sm); }

/* ---------- 响应式断点 ---------- */
@media (min-width: 768px) {
  :root {
    --container-gutter: 2rem;
  }

  .header-state {
    display: flex;
  }

  .site-nav {
    flex-basis: auto;
    width: auto;
    border-top: none;
    padding-top: 0;
    display: block;
  }

  .nav-list {
    flex-direction: row;
    gap: .25rem;
    margin-bottom: 0;
    align-items: center;
  }

  .nav-link {
    border-left: none;
    border-bottom: 2px solid transparent;
    font-size: var(--text-body);
  }

  .nav-link[aria-current="page"] {
    border-left-color: transparent;
    border-bottom-color: var(--color-action);
    background-color: transparent;
    color: var(--color-action);
  }

  .nav-link:hover,
  .nav-link:focus-visible {
    border-bottom-color: var(--color-action-hover);
    background-color: transparent;
  }

  .nav-toggle {
    display: none;
  }

  .nav-cta {
    margin-top: 0;
    margin-left: var(--space-sm);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .content-grid {
    grid-template-columns: 1fr 300px;
  }
}

@media (min-width: 1024px) {
  :root {
    --container-gutter: 2.5rem;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* ---------- 减弱动效兼容 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}