/* ============================================================
   YOBO竞技 · Site Kit
   /assets/site.css
   赛博体育风 — 深空黑×荧光绿 / Bento信息板 / 对角线切割
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  --clr-primary: #C6FF00;
  --clr-bg: #0D0D0D;
  --clr-panel: #11151A;
  --clr-input: #1A1E24;
  --clr-border: #2A2A2A;
  --clr-accent: #FF6B00;
  --clr-cyan: #00ECD2;
  --clr-text: #F2F5F7;
  --clr-muted: #9AA6B2;

  --font-display: "Oswald", "Bahnschrift", "Arial Narrow", "Microsoft YaHei", sans-serif;
  --font-numeric: "Roboto Mono", "SF Mono", "Cascadia Mono", Consolas, monospace;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  --header-offset: 6rem;
  --content-max: 1240px;
  --content-wide: 1580px;
  --content-narrow: 860px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-card: 0 10px 32px rgba(0, 0, 0, 0.4);
  --shadow-raised: 0 22px 54px rgba(0, 0, 0, 0.55);
  --ease-out: cubic-bezier(0.2, 0.75, 0.25, 1);
  --section-space: clamp(3.5rem, 8vw, 6.5rem);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scrollbar-color: var(--clr-border) var(--clr-bg);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  background-image:
    linear-gradient(to bottom, transparent 0%, rgba(198, 255, 0, 0.02) 100%),
    linear-gradient(rgba(198, 255, 0, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 255, 0, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 44px 44px, 44px 44px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--clr-text);
}

p { margin: 0; }
ol, ul { padding: 0; }

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

a {
  color: var(--clr-primary);
  text-decoration: none;
  transition: color 0.2s linear;
}
a:hover { text-decoration: underline; }

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

address { font-style: normal; }

::selection { background: var(--clr-primary); color: var(--clr-bg); }

input, select, textarea {
  font: inherit;
  color: var(--clr-text);
  background-color: var(--clr-input);
  border: 1px solid var(--clr-border);
  border-radius: 10px;
  padding: 0.7rem 1rem;
}
input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: none;
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(198, 255, 0, 0.18);
}
::placeholder { color: var(--clr-muted); opacity: 0.75; }

/* ---------- 3. 布局基元 ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
.container--wide { max-width: var(--content-wide); }
.container--narrow { max-width: var(--content-narrow); }

#main-content {
  display: block;
  flex: 1 0 auto;
  padding-top: var(--header-offset);
  scroll-margin-top: var(--header-offset);
}
#main-content.page--flush { padding-top: 0; }

.section { padding-block: var(--section-space); }
.section--tight { padding-block: clamp(2rem, 5vw, 3.5rem); }
.section--dark {
  background-color: var(--clr-panel);
  border-block: 1px solid var(--clr-border);
}
.section--tech {
  position: relative;
  background-color: var(--clr-panel);
  background-image: repeating-linear-gradient(115deg, transparent 0 54px, rgba(198, 255, 0, 0.04) 54px 56px);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin-bottom: 2.5rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-numeric);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--clr-primary);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background-color: var(--clr-primary);
  box-shadow: 0 0 8px rgba(198, 255, 0, 0.5);
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.08;
  margin-bottom: 0;
}
.section-title strong { color: var(--clr-primary); font-weight: inherit; }
.section-lead {
  max-width: 58ch;
  margin-top: 0.8rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--clr-muted);
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--clr-border) 0%, rgba(198, 255, 0, 0.35) 50%, var(--clr-border) 100%);
}

/* ---------- 4. 按钮与状态签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  transition: transform 0.2s var(--ease-out), background-color 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background-color: var(--clr-primary);
  color: var(--clr-bg);
  font-weight: 700;
  box-shadow: 0 6px 24px rgba(198, 255, 0, 0.18);
}
.btn--primary:hover {
  background-color: #d8ff40;
  box-shadow: 0 10px 30px rgba(198, 255, 0, 0.26);
}
.btn--ghost {
  border-color: var(--clr-border);
  color: var(--clr-text);
  background-color: rgba(255, 255, 255, 0.02);
}
.btn--ghost:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background-color: rgba(198, 255, 0, 0.05);
}
.btn--accent {
  background-color: var(--clr-accent);
  color: var(--clr-bg);
  font-weight: 700;
}
.btn--accent:hover { box-shadow: 0 8px 28px rgba(255, 107, 0, 0.3); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-pill);
  background-color: var(--clr-panel);
  font-family: var(--font-numeric);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--clr-muted);
}
.chip--live {
  color: var(--clr-cyan);
  border-color: rgba(0, 236, 210, 0.4);
}
.chip--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--clr-cyan);
}
.chip--hot {
  color: var(--clr-accent);
  border-color: rgba(255, 107, 0, 0.4);
}

/* ---------- 5. 面包屑 ---------- */
.breadcrumb {
  margin-bottom: 2rem;
  font-size: 0.8rem;
  color: var(--clr-muted);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
}
.breadcrumb li { display: flex; align-items: center; gap: 0.4rem; }
.breadcrumb li + li::before {
  content: "/";
  font-family: var(--font-numeric);
  color: var(--clr-border);
}
.breadcrumb a { color: var(--clr-muted); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--clr-primary); }
.breadcrumb [aria-current="page"] { color: var(--clr-text); }

/* ---------- 6. 悬浮胶囊头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem clamp(1rem, 4vw, 2.5rem);
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  max-width: var(--content-max);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 10px 12px 10px 16px;
  background: rgba(13, 13, 13, 0.82);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
  backdrop-filter: blur(18px) saturate(120%);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-pill);
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  pointer-events: auto;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--clr-text);
  text-decoration: none;
}
.site-brand:hover { text-decoration: none; }

.site-brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--clr-primary);
  color: var(--clr-bg);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  box-shadow: 0 0 18px rgba(198, 255, 0, 0.25);
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.site-brand__name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--clr-text);
}
.site-brand__slogan {
  margin-top: 0.25rem;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-primary);
}
.site-brand__slogan::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.4rem;
  background: var(--clr-primary);
  transform: rotate(45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.site-nav__link {
  display: inline-block;
  padding: 0.6rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-muted);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color 0.2s, background-color 0.2s, box-shadow 0.2s;
}
.site-nav__link:hover {
  color: var(--clr-text);
  background-color: rgba(255, 255, 255, 0.05);
  text-decoration: none;
}
.site-nav__link[aria-current="page"] {
  color: var(--clr-bg);
  background-color: var(--clr-primary);
  box-shadow: 0 0 20px rgba(198, 255, 0, 0.3);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-pill);
  background-color: var(--clr-panel);
  color: var(--clr-text);
  transition: border-color 0.2s, color 0.2s;
}
.nav-toggle:hover { border-color: var(--clr-primary); }
.nav-toggle__bars { display: grid; gap: 4px; }
.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform 0.2s var(--ease-out), opacity 0.2s;
}
.nav-toggle__text {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--clr-muted);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 160;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-cyan));
  box-shadow: 0 0 12px rgba(198, 255, 0, 0.55);
  pointer-events: none;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background-color: var(--clr-primary);
  color: var(--clr-bg);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-raised);
  pointer-events: auto;
  transition: top 0.25s var(--ease-out);
  text-decoration: none;
}
.skip-link:hover { text-decoration: none; }
.skip-link:focus-visible {
  top: 1rem;
  outline: none;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background-color: var(--clr-panel);
  border-top: 1px solid var(--clr-border);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary) 0 20%, var(--clr-border) 20% 55%, var(--clr-accent) 55% 59%, var(--clr-border) 59% 100%);
  z-index: 1;
}

.site-footer__inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(3rem, 6vw, 4.5rem) clamp(1.25rem, 4vw, 2.5rem) 3rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1.6fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--clr-text);
}
.site-footer__logo:hover { text-decoration: none; color: var(--clr-text); }
.site-footer__logo::before {
  content: "";
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
  background-color: var(--clr-primary);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  box-shadow: 0 0 14px rgba(198, 255, 0, 0.35);
}

.site-footer__slogan {
  margin-top: 0.5rem;
  font-family: var(--font-numeric);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--clr-primary);
}
.site-footer__trust {
  max-width: 34ch;
  margin-top: 1.25rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--clr-primary);
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--clr-muted);
}

.site-footer__block {
  display: flex;
  flex-direction: column;
}
.site-footer__heading {
  position: relative;
  padding-bottom: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--clr-muted);
  margin-bottom: 1.2rem;
}
.site-footer__heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background-color: var(--clr-primary);
}

.site-footer__links {
  list-style: none;
}
.site-footer__links li { line-height: 1.2; }
.site-footer__links a {
  display: inline-block;
  padding: 0.28rem 0;
  font-size: 0.9rem;
  color: var(--clr-muted);
  transition: color 0.2s, transform 0.2s var(--ease-out);
}
.site-footer__links a:hover {
  color: var(--clr-primary);
  transform: translateX(4px);
  text-decoration: none;
}

.site-footer__contact {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.45rem;
}
.site-footer__contact p {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 0.825rem;
  line-height: 1.6;
  color: var(--clr-muted);
}
.site-footer__contact .c-label {
  flex: 0 0 auto;
  width: 3ch;
  align-self: flex-start;
  font-family: var(--font-numeric);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--clr-primary);
}
.site-footer__note {
  display: block !important;
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--clr-border);
  font-size: 0.76rem;
  line-height: 1.6;
}

.site-footer__bottom {
  border-top: 1px solid var(--clr-border);
  background-color: rgba(0, 0, 0, 0.25);
}
.site-footer__bottom-inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 1.1rem clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem 1.5rem;
  font-family: var(--font-numeric);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--clr-muted);
}
.site-footer__bottom p { display: inline-flex; align-items: center; gap: 0.4rem; }

/* ---------- 8. 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background-color: var(--clr-panel);
  border: 1px solid var(--clr-border);
  color: var(--clr-text);
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out), visibility 0.25s, border-color 0.25s, color 0.25s;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  transform: translateY(-3px);
}
.back-to-top.is-visible:hover { transform: translateY(-3px); }
.back-to-top__icon {
  font-family: var(--font-numeric);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
}

/* ---------- 9. Bento / 卡片网格 / 数据面板 ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1rem, 2vw, 1.5rem);
}
.bento__item {
  position: relative;
  overflow: hidden;
  grid-column: span 4;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  background-color: var(--clr-panel);
  transition: border-color 0.3s, transform 0.3s var(--ease-out), box-shadow 0.3s;
}
.bento__item:hover {
  border-color: rgba(198, 255, 0, 0.35);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.bento__item--lg { grid-column: span 8; }
.bento__item--sm { grid-column: span 4; }
.bento__item--full { grid-column: 1 / -1; }
.bento__item--accent {
  border-color: rgba(198, 255, 0, 0.45);
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.08), var(--clr-panel) 46%);
}
.bento__item--cut { border-radius: 0; }
.bento__item--cut::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  border-top: 28px solid var(--clr-bg);
  border-left: 28px solid transparent;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2vw, 1.5rem);
}

.media-card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  background-color: var(--clr-panel);
  transition: transform 0.3s var(--ease-out), border-color 0.3s, box-shadow 0.3s;
}
.media-card:hover {
  transform: translateY(-5px);
  border-color: rgba(198, 255, 0, 0.35);
  box-shadow: var(--shadow-card);
}
.media-card > .media { border: 0; border-radius: 0; }
.media-card__body { padding: 1.4rem 1.5rem 1.6rem; }
.media-card__title { font-size: 1.2rem; letter-spacing: 0.04em; }
.media-card__text {
  margin-top: 0.5rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--clr-muted);
}

.stat { display: grid; gap: 0.3rem; }
.stat__value {
  font-family: var(--font-numeric);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 500;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--clr-text);
}
.stat__value--live {
  color: var(--clr-primary);
  text-shadow: 0 0 18px rgba(198, 255, 0, 0.4);
}
.stat__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--clr-muted);
}

/* ---------- 10. 媒体占位 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  background-color: var(--clr-panel);
}
.media::before { content: ""; display: block; padding-top: 56.25%; }
.media--square::before { padding-top: 100%; }
.media--portrait::before { padding-top: 130%; }
.media img,
.media video,
.media canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.12), transparent 38%), linear-gradient(to top, rgba(13, 13, 13, 0.7), transparent 44%);
}
.media__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-numeric);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-muted);
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.06), transparent 50%), var(--clr-panel);
}

/* ---------- 11. 长文排版 ---------- */
.prose {
  max-width: 68ch;
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--clr-text);
}
.prose > * + * { margin-top: 1.1em; }
.prose p { color: rgba(242, 245, 247, 0.88); }
.prose h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); margin-top: 2.2em; }
.prose h3 { font-size: 1.15rem; margin-top: 1.8em; }
.prose ul, .prose ol { padding-left: 1.3em; color: var(--clr-muted); }
.prose li { margin-top: 0.4em; }
.prose li::marker { color: var(--clr-primary); }
.prose a { border-bottom: 1px solid rgba(198, 255, 0, 0.25); }
.prose a:hover { border-bottom-color: var(--clr-primary); }
.prose strong { color: var(--clr-text); }
.prose blockquote {
  border-left: 3px solid var(--clr-primary);
  padding-left: 1.2em;
  color: var(--clr-muted);
}
.prose code {
  font-family: var(--font-numeric);
  font-size: 0.85em;
  background-color: var(--clr-panel);
  border: 1px solid var(--clr-border);
  padding: 0.1em 0.4em;
  border-radius: 6px;
}

/* ---------- 12. 装饰层 ---------- */
.diag-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  background: repeating-linear-gradient(115deg, transparent 0 42px, rgba(198, 255, 0, 0.05) 42px 44px);
}
.grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.32;
  background:
    linear-gradient(rgba(198, 255, 0, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 255, 0, 0.14) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-mask-image: linear-gradient(to bottom, black, transparent 85%);
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}

/* ---------- 13. 响应式 ---------- */
@media (min-width: 921px) {
  .site-nav { display: flex; }
}

@media (max-width: 1024px) {
  .site-footer__inner { grid-template-columns: 2fr 1fr; row-gap: 3rem; }
  .site-footer__brand { grid-column: 1 / -1; }
  .bento__item,
  .bento__item--sm { grid-column: span 6; }
  .bento__item--lg { grid-column: span 12; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 920px) {
  .site-header { padding: 0.75rem clamp(0.75rem, 4vw, 1.5rem); }
  .site-header__inner { border-radius: 18px; padding: 8px 8px 8px 14px; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 12px;
    right: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    background: rgba(13, 13, 13, 0.96);
    border: 1px solid var(--clr-border);
    border-radius: 20px;
    box-shadow: var(--shadow-raised);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out), visibility 0.25s;
  }
  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .site-nav__link {
    padding: 1.05rem 1.1rem;
    font-size: 1rem;
    border-radius: 14px;
  }
  .site-nav__link[aria-current="page"] { box-shadow: 0 0 24px rgba(198, 255, 0, 0.35); }
}

@media (max-width: 600px) {
  .site-footer__inner { grid-template-columns: 1fr; row-gap: 2.5rem; }
  .site-footer__brand { grid-column: auto; }
  .site-footer__bottom-inner { flex-direction: column; align-items: flex-start; }

  .bento__item,
  .bento__item--sm,
  .bento__item--lg,
  .bento__item--full { grid-column: span 12; }
  .card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 400px) {
  .site-brand__slogan { display: none; }
  .nav-toggle__text { display: none; }
}

/* ---------- 14. 可访问性 ---------- */
:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 3px;
  border-radius: 6px;
}

@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;
  }
}