/*=========================================================
  迈博看台 Maibo Arena — 共享样式 /assets/site.css
=========================================================*/

/* ---------- CSS 变量 ---------- */
:root {
  --c-bg: #0B1E3A;
  --c-bg-dark: #050E1C;
  --c-card: #1A2E4A;
  --c-accent: #39FF14;
  --c-gold: #C9A227;
  --c-text: #FFFFFF;
  --c-sub: #A0B4C8;
  --c-online: #00E676;
  --c-warn: #FF9800;
  --c-danger: #E53935;
  --line-rule: rgba(160,180,200,0.16);
  --line-rule-strong: rgba(160,180,200,0.30);
  --rail-w: 268px;
  --radius: 10px;
  --shadow-card: 0 10px 30px rgba(5,14,28,0.35);
  --font-body: "Roboto", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-serif: "Zilla Slab", "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 180ms;
  --t-mid: 300ms;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background-color: var(--c-bg);
  background-image:
    radial-gradient(ellipse 90% 70% at 88% -10%, rgba(57,255,20,0.05), transparent),
    radial-gradient(ellipse 70% 60% at 5% 110%, rgba(201,162,39,0.04), transparent),
    linear-gradient(180deg, #0b1e3a 0%, #0a1b36 60%, #050e1c 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

p {
  overflow-wrap: break-word;
  word-break: break-word;
}

ul,
ol {
  list-style: none;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 900;
  line-height: 1.3;
}

::selection {
  background: rgba(57, 255, 20, 0.28);
  color: var(--c-text);
}

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 无障碍 ---------- */
.skip-link {
  position: fixed;
  top: -56px;
  left: 16px;
  z-index: 3000;
  background: var(--c-accent);
  color: #05120a;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 0 0 6px 6px;
  transition: top 200ms ease;
}

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

.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;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--c-bg-dark);
}

::-webkit-scrollbar-thumb {
  background: rgba(160, 180, 200, 0.24);
  border-radius: 5px;
  border: 2px solid var(--c-bg-dark);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(160, 180, 200, 0.36);
}

/* =========================================================
   侧边轨道 Header
========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 1200;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, rgba(11,30,58,0.62), rgba(5,14,28,0.52));
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-right: 1px solid var(--line-rule);
  transition: background var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}

.site-header[data-scrolled] {
  background: rgba(5, 14, 28, 0.94);
  box-shadow: 8px 0 28px rgba(5, 14, 28, 0.32);
  border-right-color: var(--line-rule-strong);
}

@supports not ((backdrop-filter: blur(8px)) or (-webkit-backdrop-filter: blur(8px))) {
  .site-header {
    background: rgba(11, 30, 58, 0.92);
  }
}

/* 品牌行 */
.rail-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 26px 20px 22px;
  border-bottom: 1px solid var(--line-rule);
  flex-shrink: 0;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  background: linear-gradient(135deg, #39ff14 0%, #25c45d 70%, #0f7a3d 100%);
  color: #05120a;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -0.02em;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.14), 0 4px 16px rgba(57,255,20,0.18);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.06em;
  color: var(--c-text);
  white-space: nowrap;
}

.brand-en {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--c-sub);
  margin-top: 5px;
  white-space: nowrap;
}

/* 导航开关 */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border: 1px solid var(--line-rule-strong);
  border-radius: 6px;
  background: rgba(26, 46, 74, 0.4);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--c-accent);
  background: rgba(57, 255, 20, 0.06);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--c-text);
  border-radius: 1px;
  transition: transform 260ms var(--ease), opacity 180ms ease;
}

.nav-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 主导航 */
.rail-nav {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-top: 22px;
}

.nav-list > li + li {
  margin-top: 4px;
}

.nav-list a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 28px 11px 26px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--c-sub);
  border-left: 3px solid transparent;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.nav-list a:hover {
  color: var(--c-text);
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.06), transparent 70%);
  border-left-color: var(--c-accent);
}

.nav-list a[aria-current="page"] {
  color: var(--c-text);
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.12), transparent 75%);
  border-left-color: var(--c-accent);
  font-weight: 700;
}

.nav-list a[aria-current="page"] .nav-index {
  color: var(--c-accent);
}

.nav-list a[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 6px rgba(57, 255, 20, 0.7);
  transform: translateY(-50%);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(160, 180, 200, 0.48);
  width: 24px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* 轨道底部 */
.rail-foot {
  flex-shrink: 0;
  padding: 18px 20px 24px;
  border-top: 1px solid var(--line-rule);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.rail-foot::after {
  content: "";
  display: block;
  height: 2px;
  width: 40px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-gold));
  opacity: 0.5;
}

.live-status {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-sub);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-online);
  box-shadow: 0 0 0 4px rgba(0, 230, 118, 0.12), 0 0 12px rgba(0, 230, 118, 0.5);
  animation: status-pulse 2.4s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% {
    box-shadow: 0 0 0 4px rgba(0, 230, 118, 0.12), 0 0 8px rgba(0, 230, 118, 0.4);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(0, 230, 118, 0.05), 0 0 16px rgba(0, 230, 118, 0.7);
  }
}

.rail-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* =========================================================
   按钮
========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  white-space: nowrap;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

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

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--c-accent);
  color: #05120a;
  font-weight: 700;
  border: 1px solid var(--c-accent);
  box-shadow: 0 4px 16px rgba(57, 255, 20, 0.22);
}

.btn-primary:hover {
  background: #55ff35;
  box-shadow: 0 6px 24px rgba(57, 255, 20, 0.32);
}

.btn-ghost {
  background: transparent;
  color: var(--c-sub);
  border: 1px solid var(--line-rule-strong);
}

.btn-ghost:hover {
  color: var(--c-text);
  border-color: rgba(160, 180, 200, 0.6);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
}

/* =========================================================
   页脚
========================================================= */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--c-bg-dark) 0%, #030a14 100%);
  border-top: 1px solid var(--line-rule);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(57, 255, 20, 0.4), transparent);
  z-index: 1;
}

.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  padding: 52px 40px 56px;
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.footer-brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.05em;
  color: var(--c-text);
}

.footer-trust {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-sub);
  border-left: 2px solid var(--c-accent);
  padding-left: 16px;
  max-width: 340px;
}

.footer-cta {
  align-self: flex-start;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h3 {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 18px;
}

.footer-col li {
  margin-bottom: 9px;
}

.footer-col a {
  font-size: 14px;
  color: var(--c-sub);
  transition: color var(--t-fast) var(--ease);
}

.footer-col a:hover {
  color: var(--c-accent);
}

.footer-contact {
  font-size: 13px;
  color: var(--c-sub);
  line-height: 1.85;
}

/* 页脚底部 */
.footer-bottom {
  border-top: 1px solid var(--line-rule);
  background: rgba(3, 10, 20, 0.7);
}

.footer-bottom-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 40px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  font-size: 12px;
  color: var(--c-sub);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-legal a {
  color: var(--c-sub);
  transition: color var(--t-fast) var(--ease);
}

.footer-legal a:hover {
  color: var(--c-accent);
}

/* =========================================================
   正文布局与通用组件
========================================================= */
#main-content {
  min-height: 60vh;
}

@media (min-width: 1024px) {
  #main-content {
    margin-left: var(--rail-w);
  }

  .site-footer {
    margin-left: var(--rail-w);
  }
}

.content-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) clamp(20px, 4vw, 48px) clamp(56px, 7vw, 88px);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  font-size: 13px;
  color: var(--c-sub);
}

.breadcrumb a {
  color: var(--c-sub);
  transition: color var(--t-fast) var(--ease);
}

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

.breadcrumb-sep {
  color: rgba(160, 180, 200, 0.35);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* 章节标签与标题 */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 12px;
}

.section-label::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--c-gold);
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--c-text);
  margin-bottom: 16px;
}

.section-sub {
  font-size: 15px;
  color: var(--c-sub);
  max-width: 640px;
}

/* 数据卡片 */
.data-card {
  position: relative;
  background: linear-gradient(135deg, rgba(26, 46, 74, 0.86), rgba(5, 14, 28, 0.62));
  border: 1px solid var(--line-rule);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow-card);
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}

.data-card:hover {
  transform: translateY(-3px);
  border-color: rgba(57, 255, 20, 0.3);
  box-shadow: 0 14px 40px rgba(5, 14, 28, 0.5);
}

.data-card-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-sub);
}

.data-card-value {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-gold);
  margin-top: 8px;
  font-variant-numeric: tabular-nums;
}

.data-card-value.accent {
  color: var(--c-accent);
}

/* 媒体占位容器 */
.media-frame {
  display: block;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(5, 14, 28, 0.64), rgba(26, 46, 74, 0.42));
  border: 1px solid var(--line-rule);
  border-radius: var(--radius);
  aspect-ratio: 16 / 9;
  min-height: 120px;
}

.media-frame::after {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(160, 180, 200, 0.3);
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* 倾斜动势 */
.tilt-left {
  transform: rotate(-5deg);
}

.tilt-right {
  transform: rotate(4deg);
}

/* 响应式网格 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* 滚动显现 */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

[data-reveal][data-revealed] {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 80ms; }
.delay-2 { transition-delay: 160ms; }
.delay-3 { transition-delay: 240ms; }
.delay-4 { transition-delay: 320ms; }

/* =========================================================
   响应式断点
========================================================= */
@media (min-width: 768px) and (max-width: 1023.98px) {
  .site-header {
    width: 220px;
  }

  .rail-top {
    padding: 20px 16px 18px;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    font-size: 15px;
  }

  .brand-name {
    font-size: 16px;
  }

  .brand-en {
    font-size: 8px;
    letter-spacing: 0.14em;
  }

  .nav-list a {
    padding: 10px 20px 10px 18px;
    gap: 10px;
    font-size: 14px;
  }

  .nav-index {
    width: 18px;
    font-size: 11px;
  }

  .rail-foot {
    padding: 14px 16px 20px;
  }

  .footer-grid {
    padding: 44px 28px 48px;
    gap: 32px;
  }

  .footer-nav {
    gap: 20px;
  }
}

@media (max-width: 1023.98px) {
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: auto;
    display: block;
    background: rgba(5, 14, 28, 0.92);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-right: none;
    border-bottom: 1px solid var(--line-rule);
    box-shadow: 0 4px 20px rgba(5, 14, 28, 0.3);
  }

  .site-header[data-scrolled] {
    background: rgba(5, 14, 28, 0.96);
    box-shadow: 0 4px 24px rgba(5, 14, 28, 0.4);
  }

  .rail-top {
    padding: 10px 16px;
    border-bottom: none;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 15px;
  }

  .brand-name {
    font-size: 17px;
  }

  .brand-en {
    font-size: 8px;
    letter-spacing: 0.16em;
  }

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

  .rail-nav {
    display: none;
    width: 100%;
    padding: 6px 0 12px;
    border-top: 1px solid var(--line-rule);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .rail-nav[data-open] {
    display: block;
  }

  .nav-list a {
    padding: 12px 22px;
    border-left: none;
    border-bottom: 1px solid rgba(160, 180, 200, 0.07);
  }

  .nav-list a::after {
    right: 20px;
  }

  .nav-index {
    width: 28px;
  }

  .rail-foot {
    display: none;
    padding: 14px 20px 20px;
    border-top: 1px solid var(--line-rule);
  }

  .rail-nav[data-open] ~ .rail-foot {
    display: flex;
  }

  .rail-foot::after {
    margin-top: 0;
  }

  #main-content {
    padding-top: 64px;
  }

  .content-container {
    padding-top: 36px;
  }
}

@media (max-width: 767.98px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 40px 20px 44px;
  }

  .footer-nav {
    grid-template-columns: 1fr 1fr;
    gap: 28px 20px;
  }

  .footer-bottom-inner {
    padding: 14px 20px;
    flex-direction: column;
    align-items: flex-start;
  }

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

  .media-frame {
    aspect-ratio: 4 / 3;
  }

  .content-container {
    padding: 28px 20px 56px;
  }

  #main-content {
    padding-top: 60px;
  }
}

/* =========================================================
   Reduced Motion
========================================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .skip-link {
    transition: none;
  }

  .status-dot {
    animation: none;
  }

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