/* ============================================================
   BSPORTS竞技 · 全站共享样式 Site Kit
   深空蓝主幕 / 荧光绿数据流 / 电光橙高亮 / 右缘框架导航
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  --c-bg-deep: #0A192F;
  --c-bg-panel: #112240;
  --c-bg-deepest: #040B14;
  --c-accent: #00FF66;
  --c-accent-orange: #FF6B00;
  --c-info: #4D9DE0;
  --c-text: #EAEAEA;
  --c-text-dim: #9CA3AF;
  --c-border: rgba(234, 234, 234, 0.12);
  --c-border-strong: rgba(234, 234, 234, 0.24);
  --c-border-green: rgba(0, 255, 102, 0.24);
  --c-border-orange: rgba(255, 107, 0, 0.4);

  --font-display: "Barlow Condensed", "Arial Narrow", Impact, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica", "Arial", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;

  --container-max: 1280px;
  --header-h: 68px;
  --header-h-scrolled: 56px;
  --nav-rail: 108px;
  --space-section: clamp(64px, 10vh, 104px);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 0.18s ease-out;
  --t-mid: 0.32s var(--ease-out);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background-color: var(--c-bg-deep);
  background-image:
    linear-gradient(rgba(234, 234, 234, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(234, 234, 234, 0.028) 1px, transparent 1px);
  background-size: 44px 44px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--c-accent);
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover {
  color: var(--c-accent-orange);
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  color: var(--c-text);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.4rem);
  font-weight: 900;
  font-style: italic;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}
h2 { font-size: clamp(1.9rem, 3.8vw, 2.9rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }

p {
  margin-bottom: 1em;
}

strong {
  font-weight: 700;
}

::selection {
  background: var(--c-accent);
  color: #040B14;
}

::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--c-bg-deep);
}
::-webkit-scrollbar-thumb {
  background: #1D3A5F;
  border: 2px solid var(--c-bg-deep);
  border-radius: 20px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--c-accent);
}

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

.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;
}

/* ---------- 3. 文本工具 ---------- */
.h-display {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 5rem);
  font-weight: 900;
  font-style: italic;
  line-height: 0.95;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  color: var(--c-text);
}
.h-section {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  font-style: italic;
  line-height: 1.02;
  text-transform: uppercase;
}
.h-sub {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: 600;
}
.text-dim { color: var(--c-text-dim); }
.text-accent { color: var(--c-accent); }
.text-orange { color: var(--c-accent-orange); }
.font-mono { font-family: var(--font-mono); }

/* ---------- 4. 按钮体系 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: #040B14;
  background: var(--c-accent);
  border: 1px solid var(--c-accent);
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}
.btn:hover {
  background: var(--c-accent-orange);
  border-color: var(--c-accent-orange);
  color: #040B14;
  transform: translate(-2px, -2px);
}
.btn:active {
  transform: translate(0, 0);
}
.btn-ghost {
  background: transparent;
  color: var(--c-accent);
}
.btn-ghost:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #040B14;
}
.btn-orange {
  background: var(--c-accent-orange);
  border-color: var(--c-accent-orange);
  color: #040B14;
}
.btn-orange:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  letter-spacing: 0.06em;
}
.btn-block {
  display: flex;
  width: 100%;
}

/* ---------- 5. 布局原语 ---------- */
.container {
  width: min(100% - 32px, var(--container-max));
  margin-inline: auto;
}

#main-content {
  padding-top: calc(var(--header-h) + 24px);
  padding-bottom: clamp(48px, 8vw, 100px);
  min-height: 70vh;
}

.section {
  padding-block: var(--space-section);
  position: relative;
}
.section-head {
  max-width: 760px;
  margin-bottom: 32px;
}
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: 600;
}
.section-kicker::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--c-accent);
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}
.section-title {
  margin-top: 12px;
}
.section-desc {
  margin-top: 16px;
  color: var(--c-text-dim);
  max-width: 640px;
}

.grid {
  display: grid;
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.container-narrow {
  width: min(100% - 32px, 820px);
  margin-inline: auto;
}

.split-hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: clamp(20px, 4vw, 56px);
  align-items: center;
  min-height: calc(100vh - var(--header-h));
  min-height: calc(100svh - var(--header-h));
}
.hero-narrative {
  padding: 40px 0;
}
.hero-visual {
  position: relative;
  min-height: 380px;
}

.vertical-label {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-text-dim);
}

.divider {
  height: 1px;
  border: none;
  margin: 24px 0;
  background: linear-gradient(90deg, var(--c-border-strong), transparent);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-text-dim);
  margin-bottom: 24px;
}
.breadcrumbs li + li::before {
  content: '/';
  margin-right: 6px;
  color: var(--c-text-dim);
  opacity: 0.55;
}
.breadcrumbs a {
  color: var(--c-info);
}
.breadcrumbs a:hover {
  color: var(--c-accent);
}
.breadcrumbs .current {
  color: var(--c-text);
}

/* ---------- 6. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 25, 47, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--t-mid), box-shadow var(--t-mid), border-color var(--t-mid);
}
.site-header[data-scrolled] {
  background: rgba(6, 15, 29, 0.92);
  border-bottom-color: rgba(0, 255, 102, 0.15);
  box-shadow: 0 10px 30px rgba(2, 6, 12, 0.5);
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 3000;
  padding: 10px 18px;
  background: var(--c-accent);
  color: #040B14;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 14px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: top var(--t-fast);
}
.skip-link:focus-visible {
  top: 12px;
  outline: none;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--header-h);
  padding: 0 clamp(16px, 3vw, 28px);
  transition: height var(--t-mid);
}
.site-header[data-scrolled] .header-inner {
  height: var(--header-h-scrolled);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--c-text);
  flex-shrink: 0;
}
.brand:hover {
  color: var(--c-text);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--c-accent);
  color: var(--c-bg-deep);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  font-style: italic;
  letter-spacing: -0.02em;
  clip-path: polygon(0 8px, 8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background var(--t-fast);
}
.brand:hover .brand-mark {
  background: var(--c-accent-orange);
}
.brand-mark::after {
  content: '';
  position: absolute;
  right: 5px;
  bottom: 5px;
  width: 6px;
  height: 6px;
  background: var(--c-accent-orange);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  transition: background var(--t-fast);
}
.brand:hover .brand-mark::after {
  background: var(--c-accent);
}
.brand-mark {
  position: relative;
}

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.brand-name-line {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.brand-name-line strong {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  font-style: italic;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--c-text);
}
.brand-name-line span {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--c-accent);
}
.brand-tagline {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-text-dim);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-dim);
}
.header-sync {
  white-space: nowrap;
}
.live-pulse {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-accent);
  animation: livePulse 1.6s ease-out infinite;
}
@keyframes livePulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 255, 102, 0.4); }
  70% { box-shadow: 0 0 0 8px rgba(0, 255, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 255, 102, 0); }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
  flex-shrink: 0;
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-accent-orange) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 40px;
  padding: 9px 8px;
  background: transparent;
  border: 1px solid var(--c-border);
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: border-color var(--t-fast);
}
.nav-toggle:hover {
  border-color: var(--c-accent);
}
.nav-toggle-inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  width: 100%;
}
.nav-toggle-bar {
  display: block;
  height: 2px;
  background: var(--c-text);
  transition: background var(--t-fast);
}
.nav-toggle:hover .nav-toggle-bar {
  background: var(--c-accent);
}
.nav-toggle-bar:nth-child(2) {
  width: 68%;
  background: var(--c-accent);
}

/* ---------- 7. 导航系统 ---------- */
.nav-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1200;
  background: rgba(2, 6, 12, 0.66);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-fast);
}

.site-nav {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 950;
  height: 100vh;
  height: 100dvh;
  width: var(--nav-rail);
  box-sizing: border-box;
  background: rgba(4, 11, 20, 0.42);
  border-left: 1px solid rgba(0, 255, 102, 0.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: calc(var(--header-h) + 16px) 8px 24px;
  overflow-y: auto;
  overscroll-behavior: contain;
  visibility: visible;
  scrollbar-width: thin;
}

.site-nav .nav-drawer-head,
.site-nav .nav-drawer-meta {
  display: none;
}

.nav-rail-mark {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  font-style: italic;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: rgba(234, 234, 234, 0.36);
  writing-mode: vertical-rl;
  text-orientation: mixed;
}
.nav-rail-foot {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-accent);
  writing-mode: vertical-rl;
  opacity: 0.55;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-block: auto;
}

.site-nav .nav-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: calc(var(--nav-rail) - 28px);
  padding: 12px 4px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  text-decoration: none;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  border-left: 2px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.site-nav .nav-link:hover {
  color: var(--c-text);
  border-left-color: var(--c-accent);
  background: linear-gradient(90deg, rgba(0, 255, 102, 0.1), transparent);
}
.site-nav .nav-link[aria-current="page"] {
  color: var(--c-accent);
  border-left-color: var(--c-accent);
  background: linear-gradient(90deg, rgba(0, 255, 102, 0.16), transparent);
}

@media (min-width: 1024px) {
  .header-inner {
    padding-right: calc(var(--nav-rail) + 8px);
  }
  #main-content {
    padding-right: var(--nav-rail);
  }
  .site-footer {
    padding-right: calc(clamp(16px, 4vw, 48px) + var(--nav-rail));
  }
}

@media (max-width: 1023.98px) {
  .nav-toggle {
    display: flex;
  }

  .nav-scrim {
    display: block;
  }
  .nav-scrim[data-open] {
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav {
    top: 0;
    right: 0;
    bottom: 0;
    width: min(340px, 86vw);
    height: auto;
    z-index: 1400;
    background: rgba(3, 9, 18, 0.985);
    border-left: 1px solid var(--c-border-green);
    box-shadow: -24px 0 70px rgba(0, 0, 0, 0.5);
    padding: 72px 26px 32px;
    align-items: stretch;
    justify-content: flex-start;
    clip-path: polygon(20px 0, 100% 0, 100% 100%, 0 100%, 0 20px);
    transform: translateX(105%);
    visibility: hidden;
    transition: transform 0.36s var(--ease-out), visibility 0s linear 0.36s;
    -webkit-overflow-scrolling: touch;
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.36s var(--ease-out), visibility 0s linear 0s;
  }

  .site-nav .nav-drawer-head {
    display: flex;
    position: absolute;
    top: 18px;
    right: 18px;
  }

  .nav-close {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    color: var(--c-text);
    background: rgba(234, 234, 234, 0.04);
    border: 1px solid var(--c-border);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
    transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
  }
  .nav-close:hover {
    color: var(--c-accent);
    border-color: var(--c-accent);
    background: rgba(0, 255, 102, 0.08);
  }
  .nav-close-icon {
    position: relative;
    display: block;
    width: 16px;
    height: 16px;
  }
  .nav-close-icon::before,
  .nav-close-icon::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 2px;
    background: currentColor;
  }
  .nav-close-icon::before {
    transform: rotate(-45deg);
  }
  .nav-close-icon::after {
    transform: rotate(45deg);
  }

  .nav-rail-mark,
  .site-nav .nav-rail-foot {
    display: none;
  }

  .site-nav .nav-list {
    width: 100%;
    margin-block: 12px 0;
    gap: 0;
  }
  .site-nav .nav-link {
    writing-mode: initial;
    text-orientation: initial;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 16px 2px;
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: none;
    color: var(--c-text);
    border: none;
    border-bottom: 1px solid var(--c-border);
    background: none;
  }
  .site-nav .nav-link::after {
    content: '';
    display: inline-block;
    width: 7px;
    height: 7px;
    border-top: 2px solid var(--c-text-dim);
    border-right: 2px solid var(--c-text-dim);
    transform: rotate(45deg);
    opacity: 0.5;
    transition: border-color var(--t-fast), opacity var(--t-fast);
  }
  .site-nav .nav-link:hover,
  .site-nav .nav-link[aria-current="page"] {
    background: linear-gradient(90deg, rgba(0, 255, 102, 0.08), transparent);
    border-bottom-color: var(--c-accent);
    color: var(--c-accent);
    border-left: none;
  }
  .site-nav .nav-link:hover::after,
  .site-nav .nav-link[aria-current="page"]::after {
    border-color: var(--c-accent);
    opacity: 1;
  }

  .site-nav .nav-drawer-meta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid var(--c-border);
  }
  .nav-drawer-tag {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-text-dim);
  }
  .nav-drawer-tag::before {
    content: '▸ ';
    color: var(--c-accent);
  }

  body.nav-locked {
    overflow: hidden;
  }
}

@media (max-width: 800px) {
  .header-meta {
    display: none;
  }
  .header-inner {
    padding-inline: 14px;
  }
  .brand-name-line strong {
    font-size: 19px;
  }
  .brand-name-line span {
    font-size: 14px;
  }
  .brand-tagline {
    display: none;
  }
}

@media (max-width: 520px) {
  .header-actions .btn {
    display: none;
  }
  .header-actions {
    margin-left: auto;
  }
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 10vw, 96px);
  padding: clamp(48px, 6vw, 72px) clamp(16px, 4vw, 48px) 28px;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(0, 255, 102, 0.06), transparent 60%),
    linear-gradient(180deg, #071120 0%, var(--c-bg-deepest) 100%);
  border-top: 1px solid rgba(0, 255, 102, 0.14);
  overflow: hidden;
}
.footer-beam {
  position: absolute;
  top: -2px;
  left: 10%;
  right: -8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 102, 0.24), transparent);
  transform: rotate(-4deg);
  pointer-events: none;
}
.footer-container {
  max-width: var(--container-max);
  margin-inline: auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.6fr;
  gap: clamp(24px, 4vw, 40px);
  padding-bottom: 40px;
  border-bottom: 1px solid var(--c-border);
}
.footer-brand-panel {
  position: relative;
}
.footer-brand {
  margin-bottom: 18px;
}
.footer-brand .brand-name-line strong {
  color: var(--c-text);
}
.footer-lead {
  margin: 0 0 16px;
  max-width: 420px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-text-dim);
}
.footer-trust {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent);
  background: rgba(0, 255, 102, 0.08);
  border: 1px solid rgba(0, 255, 102, 0.16);
  padding: 6px 12px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.footer-col-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-accent);
}
.footer-col-title::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 2px;
  background: var(--c-accent);
}

.footer-links li + li {
  margin-top: 8px;
}
.footer-links a {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--c-text-dim);
  transition: color var(--t-fast), padding-left var(--t-fast);
}
.footer-links a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--c-accent);
  transition: width var(--t-fast);
}
.footer-links a:hover {
  color: var(--c-accent);
  padding-left: 14px;
}
.footer-links a:hover::before {
  width: 8px;
}
.footer-links a[aria-current="page"] {
  color: var(--c-accent);
  padding-left: 14px;
}
.footer-links a[aria-current="page"]::before {
  width: 8px;
}

.footer-contact li {
  padding: 6px 0;
  border-bottom: 1px dashed rgba(234, 234, 234, 0.1);
  font-size: 13px;
  color: var(--c-text);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text-dim);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
}
.footer-icp {
  color: var(--c-text-dim);
}
.footer-en {
  color: rgba(156, 163, 175, 0.5);
}

@media (max-width: 1023.98px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* ---------- 9. 内容组件 ---------- */
.panel {
  position: relative;
  background: linear-gradient(160deg, rgba(17, 34, 64, 0.95), rgba(13, 27, 53, 0.9));
  clip-path: polygon(0 16px, 16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}
.panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 255, 102, 0.07) 0%, transparent 32%);
  clip-path: inherit;
  pointer-events: none;
}
.panel-pad {
  padding: clamp(20px, 3vw, 40px);
}

.stat-card {
  position: relative;
  background: var(--c-bg-panel);
  padding: 20px 22px;
  border-left: 3px solid var(--c-accent);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}
.stat-card[data-accent="orange"] {
  border-left-color: var(--c-accent-orange);
}
.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-text);
}
.stat-value em {
  font-style: normal;
  color: var(--c-accent);
}
.stat-card[data-accent="orange"] .stat-value em {
  color: var(--c-accent-orange);
}
.stat-label {
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  font-weight: 600;
}

.badge,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 600;
  line-height: 1.5;
}
.badge {
  background: var(--c-accent);
  color: #040B14;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}
.tag {
  background: rgba(77, 157, 224, 0.12);
  color: var(--c-info);
  border: 1px solid rgba(77, 157, 224, 0.3);
}
.tag--orange {
  background: rgba(255, 107, 0, 0.1);
  color: var(--c-accent-orange);
  border-color: var(--c-border-orange);
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 20px;
}
.tab {
  padding: 10px 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  background: transparent;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.tab:hover {
  color: var(--c-text);
  background: rgba(234, 234, 234, 0.04);
}
.tab[aria-selected="true"] {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}
.tab-panel {
  display: block;
}
.tab-panel[hidden] {
  display: none;
}

.img-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #112240, #0A192F);
  clip-path: polygon(0 14px, 14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}
.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.08) saturate(1.1);
  transition: transform 0.5s var(--ease-out), filter 0.5s;
}
.img-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(0, 255, 102, 0.14) 45%, transparent 60%);
  background-size: 220% 100%;
  background-position: 200% 0;
  animation: imgScan 6s linear infinite;
  pointer-events: none;
}
.img-frame:hover > img {
  transform: scale(1.04) rotate(-1deg);
  filter: contrast(1.15) saturate(1.2);
}
@keyframes imgScan {
  0% { background-position: 200% 0; }
  100% { background-position: -120% 0; }
}

.research-board {
  position: relative;
  background:
    linear-gradient(rgba(234, 234, 234, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(234, 234, 234, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
  border-top: 2px solid var(--c-accent);
  padding: clamp(24px, 4vw, 48px);
}
.evidence-boundary {
  border-left: 2px solid var(--c-accent-orange);
  padding-left: 18px;
  margin: 24px 0;
  font-size: 14px;
  color: var(--c-text-dim);
}
.term-chip {
  display: inline-block;
  padding: 2px 12px;
  background: rgba(0, 255, 102, 0.06);
  border: 1px solid rgba(0, 255, 102, 0.2);
  color: var(--c-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.ext-read {
  position: relative;
  display: block;
  padding: 20px 44px 20px 24px;
  background: var(--c-bg-panel);
  color: var(--c-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background var(--t-fast), color var(--t-fast);
}
.ext-read::after {
  content: '→';
  position: absolute;
  right: 16px;
  bottom: 12px;
  color: var(--c-accent);
  font-size: 18px;
  transition: transform var(--t-fast);
}
.ext-read:hover {
  background: var(--c-accent);
  color: #040B14;
}
.ext-read:hover::after {
  transform: translateX(4px);
}

.data-strip {
  display: flex;
  gap: 0;
  overflow-x: auto;
  padding: 12px 0;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  overscroll-behavior-x: contain;
}
.data-cell {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
  padding: 4px 14px;
  border-right: 1px solid var(--c-border);
  white-space: nowrap;
}
.data-cell:first-child {
  padding-left: 0;
  color: var(--c-accent);
}

/* ---------- 10. 滚动显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s var(--ease-out);
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 11. 响应式栅格 ---------- */
@media (max-width: 1023.98px) {
  .grid-4,
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .split-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .hero-visual {
    min-height: 280px;
  }
}
@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .section {
    padding-block: 48px;
  }
}

/* ---------- 12. 减少动效偏好 ---------- */
@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;
  }
  .live-pulse {
    animation: none;
    box-shadow: 0 0 0 4px rgba(0, 255, 102, 0.15);
  }
  .img-frame::after {
    animation: none;
    background: none;
  }
  .header-progress {
    display: none;
  }
  .js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}