/* ============================================================
   万搏体育主站 — 共享外壳样式
   路径：/assets/site.css
   内容：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件 / 响应式
   ============================================================ */

/* ---------- 1. reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd, fieldset {
  margin: 0;
}

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

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

button, input, select, textarea { font: inherit; color: inherit; }

a { color: inherit; }

:focus-visible {
  outline: 3px solid #F2C14E;
  outline-offset: 3px;
}

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B1F1A;
  --ink-2: #12352C;
  --ink-3: #1C4A3D;
  --gold: #F2C14E;
  --gold-2: #FFE3A3;
  --red: #E63946;
  --red-2: #B4232F;
  --paper: #F4F7F5;
  --muted: #8FA69E;
  --grid: #2A4A40;

  --shadow-lg: 10px 10px 0 rgba(0, 0, 0, 0.45);
  --shadow-sm: 5px 5px 0 rgba(0, 0, 0, 0.42);

  --maxw: 1280px;
  --header-h: 74px;

  --font-head: "Arial Black", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
}

/* ---------- 3. 中文排版与底色 ---------- */
body {
  position: relative;
  min-height: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(242, 193, 78, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 193, 78, 0.055) 1px, transparent 1px);
  background-size: 68px 68px, 68px 68px;
  background-position: 0 0, 0 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(620px 420px at 84% -8%, rgba(242, 193, 78, 0.13), transparent 70%),
    radial-gradient(520px 380px at 4% 106%, rgba(230, 57, 70, 0.11), transparent 72%);
  animation: glow-drift 22s ease-in-out infinite alternate;
}

@keyframes glow-drift {
  from { transform: translate3d(0, 0, 0) scale(1); opacity: 0.85; }
  to   { transform: translate3d(-3%, 2%, 0) scale(1.08); opacity: 1; }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--paper);
}

h1 { font-size: clamp(2.4rem, 6vw, 5.5rem); }
h2 { font-size: clamp(1.75rem, 3.6vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.75rem); }
h4 { font-size: 1.05rem; }

strong, b { font-weight: 700; color: var(--gold-2); }

code, kbd, samp { font-family: var(--font-mono); font-size: 0.92em; }

#main-content { scroll-margin-top: calc(var(--header-h) + 12px); }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: -9999px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--gold);
  color: #0B1F1A;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.skip-link:focus {
  left: 12px;
  top: 12px;
}

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(11, 31, 26, 0.96);
  border-bottom: 1px solid var(--grid);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: var(--maxw);
  min-height: var(--header-h);
  margin: 0 auto;
  padding: 10px 24px;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
  min-width: 0;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
}

.brand-mark {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--paper);
  white-space: nowrap;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--muted);
  white-space: nowrap;
}

.brand:hover .brand-mark { color: var(--gold-2); }

.signal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 5px 10px;
  border: 1px solid var(--red-2);
  background: rgba(230, 57, 70, 0.12);
  white-space: nowrap;
}

.signal-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--red);
  border-radius: 50%;
  animation: signal-pulse 1.9s ease-out infinite;
}

@keyframes signal-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(230, 57, 70, 0.6); }
  70%  { box-shadow: 0 0 0 9px rgba(230, 57, 70, 0); }
  100% { box-shadow: 0 0 0 0 rgba(230, 57, 70, 0); }
}

.signal-text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--paper);
}

/* 命令栏导航 */
.cmd-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}

.cmd-list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
  margin: 0;
  padding: 0;
}

.cmd-item { display: block; }

.cmd-link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 12px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.cmd-idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.cmd-link:hover,
.cmd-link:focus-visible {
  background: var(--ink-2);
  border-color: var(--grid);
  color: var(--gold-2);
}

.cmd-link[aria-current="page"] {
  background: var(--gold);
  border-color: var(--gold);
  color: #0B1F1A;
  font-weight: 700;
}

.cmd-link[aria-current="page"] .cmd-idx { color: #0B1F1A; opacity: 0.7; }

.cmd-nav-foot { display: none; }

.cmd-nav-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  word-break: break-all;
}

/* 头部动作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex: 0 0 auto;
}

.version-tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 9px;
  border: 1px solid var(--grid);
  background: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold-2);
  white-space: nowrap;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: var(--gold);
  color: #0B1F1A;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.5);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--gold-2);
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.55);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--gold);
  color: var(--gold-2);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--grid);
  background: var(--ink-2);
  cursor: pointer;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--gold);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle-bars {
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after { content: ""; left: 0; right: 0; }

.nav-toggle-bars::before { top: -7px; }
.nav-toggle-bars::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-7px) rotate(-45deg); }

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: rgba(242, 193, 78, 0.14);
  overflow: hidden;
}

.scroll-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--red), var(--gold));
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 120px;
  border-top: 2px solid var(--grid);
  background: linear-gradient(180deg, rgba(18, 53, 44, 0.55) 0%, rgba(11, 31, 26, 1) 62%);
}

.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 24px 30px;
}

.footer-signal {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 42px;
  padding: 8px 14px;
  border: 1px solid var(--grid);
  background: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold-2);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr 1.5fr;
  gap: 42px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--grid);
}

.footer-col { min-width: 0; }

.footer-brand {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-decoration: none;
}

.footer-brand:hover { color: var(--gold); }

.footer-line {
  margin-top: 14px;
  max-width: 38ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.footer-mono {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.footer-heading {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.18s ease;
}

.footer-col--links .footer-list a::before {
  content: "";
  flex: 0 0 auto;
  width: 5px;
  height: 5px;
  background: var(--gold);
}

.footer-col--links .footer-list a:hover { color: var(--gold-2); }

.footer-list--contact li {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
}

.footer-list--contact a {
  display: inline;
  color: var(--gold-2);
  text-decoration: none;
  border-bottom: 1px solid var(--grid);
}

.footer-list--contact a:hover { border-bottom-color: var(--gold); }

.footer-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.footer-val {
  color: var(--paper);
  word-break: break-word;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  padding-top: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.footer-copy,
.footer-icp { margin: 0; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
}

.footer-legal a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--grid);
}

.footer-legal a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 70;
  display: inline-flex;
  align-items: center;
  padding: 11px 15px;
  border: 1px solid var(--grid);
  background: var(--ink-2);
  color: var(--gold-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease, background-color 0.18s ease, color 0.18s ease;
}

.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  background: var(--gold);
  color: #0B1F1A;
}

/* ---------- 7. 通用容器与正文 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow { max-width: 880px; }

.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
}

.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2.2em; }
.prose h3 { margin-top: 1.8em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }
.prose li::marker { color: var(--gold); }
.prose a {
  color: var(--gold-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 面包屑 */
.breadcrumb { margin: 0 0 28px; }

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--grid); }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb [aria-current="page"] { color: var(--paper); }

/* ---------- 8. 通用块 ---------- */
.panel {
  padding: 24px;
  border: 1px solid var(--grid);
  border-left: 3px solid var(--gold);
  background: var(--ink-2);
  box-shadow: var(--shadow-sm);
}

.panel--red { border-left-color: var(--red); }

.card {
  padding: 22px;
  border: 1px solid var(--grid);
  background: var(--ink-2);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--ink-3);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 16px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--grid);
}

.section-head h2 { margin: 0; }

.idx-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  border: 1px solid var(--grid);
  background: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  white-space: nowrap;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

[data-chapter] { scroll-margin-top: calc(var(--header-h) + 20px); }

[data-chapter][data-active] .idx-tag {
  background: var(--gold);
  border-color: var(--gold);
  color: #0B1F1A;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--grid);
  background: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold-2);
  white-space: nowrap;
}

.tag--gold {
  background: var(--gold);
  border-color: var(--gold);
  color: #0B1F1A;
}

.tag--red {
  background: rgba(230, 57, 70, 0.16);
  border-color: var(--red-2);
  color: var(--paper);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

/* ---------- 9. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--grid);
  background:
    linear-gradient(140deg, var(--ink-2) 0%, var(--ink) 62%),
    var(--ink-2);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 54%, rgba(242, 193, 78, 0.14) 54.4%, transparent 100%);
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1180px) {
  .cmd-link { padding: 9px 9px; font-size: 13px; }
  .cmd-idx { display: none; }
}

@media (max-width: 1024px) {
  .nav-toggle { display: block; }

  .cmd-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    left: 0;
    z-index: 55;
    display: block;
    max-height: calc(100vh - var(--header-h));
    padding: 14px 20px 22px;
    overflow-y: auto;
    background: var(--ink);
    border-bottom: 3px solid var(--gold);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .cmd-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .cmd-list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .cmd-link {
    justify-content: flex-start;
    width: 100%;
    padding: 13px 14px;
    border-color: var(--grid);
    font-size: 16px;
  }

  .cmd-idx { display: inline; }

  .cmd-nav-foot {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--grid);
  }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-col--brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  :root { --header-h: 64px; }

  .header-inner { gap: 12px; padding: 8px 16px; }

  .brand-sub { display: none; }
  .signal { padding: 6px; gap: 0; }
  .signal-text { display: none; }
  .version-tag--desk { display: none; }

  .btn { padding: 10px 14px; font-size: 13px; }

  .container { padding: 0 16px; }
  .footer-inner { padding: 44px 16px 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-legal { margin-left: 0; }

  .to-top { right: 14px; bottom: 14px; }
}

@media (max-width: 420px) {
  .signal { display: none; }
  .brand-mark { font-size: 17px; }
}

/* ---------- 11. 无障碍与减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  body::before { animation: none; }
  .signal-dot { animation: none; }
}