/* =========================================================
   易倍体育 · 共享样式表 /assets/site.css
   夜间球场指挥室 · 堆叠档案面板 · 青橙双强调
   ========================================================= */

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

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

html[data-nav-lock] { overflow: hidden; }

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

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

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

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

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

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. Tokens ---------- */
:root {
  --carbon: #0B0F0E;
  --deep: #0E2A22;
  --panel: #143C30;
  --cyan: #47F5D2;
  --orange: #FF8A3D;
  --mist: #E8F1ED;
  --ash: #9BB0A8;
  --line: #527A6F;
  --sheen: #B8FFF0;
  --orange-deep: #C2571F;

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --yb-header-h: 76px;
  --yb-gutter: clamp(1.15rem, 4vw, 2.75rem);
  --yb-radius: 20px;
  --yb-radius-s: 14px;

  --edge-soft: rgba(82, 122, 111, 0.42);
  --edge-strong: rgba(82, 122, 111, 0.72);
  --cyan-ghost: rgba(71, 245, 210, 0.12);
  --orange-ghost: rgba(255, 138, 61, 0.12);

  --shadow-panel: 10px 10px 0 -1px rgba(82, 122, 111, 0.16),
                  0 34px 70px -48px rgba(0, 0, 0, 0.92);
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100%;
  background-color: var(--carbon);
  background-image:
    radial-gradient(1180px 620px at 10% -10%, rgba(71, 245, 210, 0.10), transparent 62%),
    radial-gradient(920px 520px at 92% 4%, rgba(255, 138, 61, 0.085), transparent 60%),
    radial-gradient(1400px 900px at 50% 120%, rgba(20, 60, 48, 0.55), transparent 70%);
  background-attachment: fixed;
  color: var(--mist);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.012em;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(82, 122, 111, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(82, 122, 111, 0.055) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 0%, transparent 78%);
}

h1, h2, h3 { line-height: 1.28; }

::selection {
  background: rgba(71, 245, 210, 0.28);
  color: var(--sheen);
}

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

/* ---------- 4. Layout ---------- */
.yb-shell {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--yb-gutter);
  position: relative;
  z-index: 1;
}

.yb-section { padding-block: clamp(2.75rem, 6.5vw, 5.5rem); }

.yb-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.yb-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.yb-section__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.72rem, 3.4vw, 2.6rem);
  letter-spacing: 0.005em;
  color: var(--mist);
  margin-top: 0.85rem;
}

.yb-section__lead {
  max-width: 62ch;
  margin-top: 1rem;
  color: var(--ash);
  font-size: 1rem;
}

/* 章节画板：左缘轴线随滚动亮起 */
.yb-chapter {
  position: relative;
  border-left: 1px solid rgba(82, 122, 111, 0.32);
  padding-left: clamp(1rem, 3vw, 2.2rem);
  transition: border-color 0.42s ease;
}

.yb-chapter[data-current] { border-left-color: var(--cyan); }

.yb-chapter[data-current] .yb-eyebrow { color: var(--cyan); }

/* ---------- 5. Header ---------- */
.yb-skip {
  position: fixed;
  top: 0.7rem;
  left: 0.7rem;
  z-index: 200;
  padding: 0.7rem 1.15rem;
  border-radius: 10px;
  background: var(--cyan);
  color: #04211B;
  font-size: 0.9rem;
  font-weight: 600;
  transform: translateY(-180%);
  transition: transform 0.22s ease;
}

.yb-skip:focus { transform: translateY(0); }

.yb-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background-color: rgba(11, 15, 14, 0);
  background-image: linear-gradient(180deg, rgba(11, 15, 14, 0.82), rgba(11, 15, 14, 0));
  border-bottom: 1px solid transparent;
  transition: background-color 0.38s ease, border-color 0.38s ease, box-shadow 0.38s ease;
}

.yb-header[data-stuck] {
  background-color: #0B0F0E;
  background-image: linear-gradient(180deg, rgba(14, 42, 34, 0.96), rgba(11, 15, 14, 0.97));
  border-bottom-color: rgba(82, 122, 111, 0.55);
  box-shadow: 0 22px 46px -34px rgba(0, 0, 0, 0.95);
}

.yb-header__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 42%, var(--orange) 100%);
  opacity: 0.9;
}

.yb-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2vw, 1.75rem);
  min-height: var(--yb-header-h);
}

.yb-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  padding-block: 0.4rem;
}

.yb-brand__mark {
  position: relative;
  display: grid;
  place-content: center;
  gap: 4px;
  width: 38px;
  height: 38px;
  padding: 0 8px;
  border: 1px solid rgba(71, 245, 210, 0.5);
  border-radius: 11px;
  background: linear-gradient(155deg, #143C30, #0B0F0E);
  box-shadow: inset 0 0 18px -6px rgba(71, 245, 210, 0.55);
}

.yb-brand__mark i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(71, 245, 210, 0.25));
}

.yb-brand__mark i:nth-child(2) { width: 70%; background: linear-gradient(90deg, var(--orange), rgba(255, 138, 61, 0.25)); }
.yb-brand__mark i:nth-child(3) { width: 45%; }

.yb-brand__text { display: grid; gap: 0.1rem; }

.yb-brand__name {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.yb-brand__tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--ash);
}

.yb-nav { margin-left: auto; }

.yb-nav__list {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.yb-nav__item { display: flex; }

.yb-nav__link {
  display: inline-block;
  padding: 0.5rem 0.82rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.93rem;
  color: rgba(232, 241, 237, 0.84);
  white-space: nowrap;
  transition: color 0.22s ease, background-color 0.22s ease, border-color 0.22s ease;
}

.yb-nav__link:hover {
  color: var(--sheen);
  border-color: rgba(71, 245, 210, 0.36);
  background: var(--cyan-ghost);
}

.yb-nav__link[aria-current="page"] {
  color: #04211B;
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 600;
}

.yb-header__actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 0 auto;
  margin-left: 0.5rem;
}

.yb-navtoggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--edge-strong);
  border-radius: 999px;
  color: var(--mist);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}

.yb-navtoggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.yb-navtoggle__bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform 0.26s ease, opacity 0.26s ease;
}

.yb-navtoggle[aria-expanded="true"] .yb-navtoggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.yb-navtoggle[aria-expanded="true"] .yb-navtoggle__bars i:nth-child(2) { opacity: 0; }
.yb-navtoggle[aria-expanded="true"] .yb-navtoggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 6. Buttons ---------- */
.yb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.68rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: background-color 0.22s ease, color 0.22s ease,
              border-color 0.22s ease, transform 0.22s ease;
}

.yb-btn--solid {
  background: var(--orange);
  color: #1A0C03;
}

.yb-btn--solid:hover { background: #FF9E5E; }

.yb-btn--solid:active {
  background: var(--orange-deep);
  color: #FFF4EC;
}

.yb-btn--ghost {
  border-color: rgba(71, 245, 210, 0.42);
  color: var(--sheen);
}

.yb-btn--ghost:hover {
  background: var(--cyan-ghost);
  border-color: var(--cyan);
}

.yb-btn--quiet {
  color: var(--ash);
  padding-inline: 0.6rem;
}

.yb-btn--quiet:hover { color: var(--sheen); }

/* ---------- 7. Cards / Panels / Tags / Stats ---------- */
.yb-panel {
  position: relative;
  padding: clamp(1.35rem, 3vw, 2.4rem);
  border: 1px solid var(--edge-soft);
  border-radius: var(--yb-radius);
  background: linear-gradient(155deg, rgba(20, 60, 48, 0.88), rgba(11, 15, 14, 0.94));
  box-shadow: var(--shadow-panel);
}

.yb-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: var(--yb-radius) var(--yb-radius) 0 0;
  background: linear-gradient(90deg, var(--cyan), rgba(71, 245, 210, 0) 46%, rgba(255, 138, 61, 0.75));
}

.yb-card {
  position: relative;
  padding: 1.2rem 1.35rem;
  border: 1px solid var(--edge-soft);
  border-radius: var(--yb-radius-s);
  background: rgba(14, 42, 34, 0.6);
  transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.25s ease;
}

.yb-card:hover {
  border-color: rgba(71, 245, 210, 0.5);
  background: rgba(20, 60, 48, 0.78);
  transform: translateY(-3px);
}

.yb-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.24rem 0.68rem;
  border: 1px solid var(--edge-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ash);
}

.yb-tag--cyan {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04211B;
}

.yb-tag--orange {
  background: var(--orange);
  border-color: var(--orange);
  color: #1A0C03;
}

.yb-tag--line {
  border-color: rgba(71, 245, 210, 0.45);
  color: var(--cyan);
}

.yb-stat { display: grid; gap: 0.25rem; }

.yb-stat__label {
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ash);
}

.yb-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 3.2vw, 2.2rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--mist);
}

.yb-stat--cyan .yb-stat__value { color: var(--cyan); }
.yb-stat--orange .yb-stat__value { color: var(--orange); }

/* ---------- 8. Grid ---------- */
.yb-grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

.yb-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.yb-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.yb-grid--split { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.65fr); }

/* ---------- 9. Breadcrumbs ---------- */
.yb-crumbs { padding-block: clamp(1.1rem, 3vw, 1.9rem); }

.yb-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ash);
}

.yb-crumbs__list li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--line);
}

.yb-crumbs__link:hover { color: var(--sheen); }

.yb-crumbs__current { color: var(--cyan); }

/* ---------- 10. Prose ---------- */
.yb-prose {
  max-width: 72ch;
  font-size: 1.02rem;
  line-height: 1.9;
  color: rgba(232, 241, 237, 0.9);
}

.yb-prose h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.2vw, 1.6rem);
  color: var(--mist);
  margin-top: 2.2rem;
}

.yb-prose h3 {
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--mist);
  margin-top: 1.6rem;
}

.yb-prose p + p { margin-top: 1rem; }

.yb-prose ul {
  display: grid;
  gap: 0.55rem;
  margin-top: 1rem;
}

.yb-prose ul li {
  position: relative;
  padding-left: 1.1rem;
}

.yb-prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.yb-prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(71, 245, 210, 0.38);
}

/* ---------- 11. Media containers ---------- */
.yb-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--edge-soft);
  border-radius: var(--yb-radius);
  background: linear-gradient(150deg, #143C30, #0B0F0E);
  isolation: isolate;
}

.yb-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.yb-media--wide { aspect-ratio: 16 / 9; }
.yb-media--tall { aspect-ratio: 4 / 5; }
.yb-media--square { aspect-ratio: 1 / 1; }

.yb-media__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1.6rem 1.1rem 0.95rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mist);
  background: linear-gradient(180deg, rgba(11, 15, 14, 0) 0%, rgba(11, 15, 14, 0.9) 70%);
}

.yb-media__figure { margin: 0; }

/* ---------- 12. Footer ---------- */
.yb-footer {
  position: relative;
  margin-top: clamp(3.5rem, 9vw, 7rem);
  border-top: 1px solid rgba(82, 122, 111, 0.5);
  background-color: var(--carbon);
  background-image:
    radial-gradient(900px 380px at 6% 0%, rgba(71, 245, 210, 0.10), transparent 62%),
    radial-gradient(780px 340px at 90% 8%, rgba(255, 138, 61, 0.075), transparent 60%),
    linear-gradient(180deg, #0E2A22 0%, #0B0F0E 76%);
  z-index: 1;
}

.yb-footer__inner {
  padding-block: clamp(2.4rem, 5vw, 3.9rem) 1.6rem;
}

.yb-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.9fr);
  gap: clamp(1.8rem, 5vw, 4rem);
  align-items: start;
}

.yb-footer__brand { display: grid; gap: 0.85rem; }

.yb-footer__mark {
  display: grid;
  place-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(71, 245, 210, 0.5);
  border-radius: 12px;
  background: linear-gradient(155deg, #143C30, #0B0F0E);
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cyan);
}

.yb-footer__line {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--mist);
  max-width: 26ch;
}

.yb-footer__note {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.12em;
  color: var(--ash);
}

.yb-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.4rem, 3vw, 2.4rem);
}

.yb-footer__col { min-width: 0; }

.yb-footer__title {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.yb-footer__list {
  display: grid;
  gap: 0.55rem;
  margin-top: 1rem;
}

.yb-footer__link {
  display: inline-block;
  font-size: 0.94rem;
  color: var(--ash);
  transition: color 0.22s ease, transform 0.22s ease;
}

.yb-footer__link:hover {
  color: var(--sheen);
  transform: translateX(3px);
}

.yb-contact { gap: 0.9rem; }

.yb-contact__item { display: grid; gap: 0.15rem; }

.yb-contact__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--line);
}

.yb-contact__value {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.yb-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: clamp(1.9rem, 4vw, 3rem);
  padding-top: 1.25rem;
  border-top: 1px solid rgba(82, 122, 111, 0.32);
}

.yb-footer__copy {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ash);
}

.yb-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.15rem;
}

/* ---------- 13. Motion hooks ---------- */
.yb-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.yb-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 14. Responsive ---------- */
@media (max-width: 1080px) {
  .yb-nav__link { padding-inline: 0.62rem; font-size: 0.89rem; }
  .yb-header__actions .yb-btn { padding-inline: 0.95rem; font-size: 0.87rem; }
}

@media (max-width: 959px) {
  :root { --yb-header-h: 64px; }

  .yb-grid--2,
  .yb-grid--3,
  .yb-grid--split { grid-template-columns: minmax(0, 1fr); }

  .yb-header__inner { gap: 0.75rem; }

  .yb-nav {
    position: fixed;
    top: var(--yb-header-h);
    left: 0;
    right: 0;
    margin: 0;
    padding: 1rem var(--yb-gutter) 1.6rem;
    max-height: calc(100vh - var(--yb-header-h));
    overflow-y: auto;
    background-color: #0B0F0E;
    background-image:
      radial-gradient(620px 300px at 8% 0%, rgba(71, 245, 210, 0.12), transparent 64%),
      linear-gradient(180deg, #0E2A22 0%, #0B0F0E 82%);
    border-top: 1px solid rgba(82, 122, 111, 0.55);
    border-bottom: 1px solid rgba(82, 122, 111, 0.55);
    box-shadow: 0 34px 64px -34px rgba(0, 0, 0, 0.95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  }

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

  .yb-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.3rem;
  }

  .yb-nav__link {
    display: block;
    padding: 0.82rem 1rem;
    border-radius: 12px;
    border-color: rgba(82, 122, 111, 0.28);
    font-size: 1rem;
  }

  .yb-nav__link[aria-current="page"] { border-color: var(--cyan); }

  .yb-header__actions { margin-left: auto; }
  .yb-header__actions .yb-btn--ghost { display: none; }
  .yb-header__actions .yb-btn { padding: 0.55rem 1rem; font-size: 0.88rem; }

  .yb-navtoggle { display: inline-flex; margin-left: 0.25rem; }

  .yb-footer__top { grid-template-columns: minmax(0, 1fr); }
  .yb-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yb-footer__col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; line-height: 1.8; }

  .yb-brand__tag { display: none; }
  .yb-brand__mark { width: 34px; height: 34px; }
  .yb-brand__name { font-size: 1.04rem; }

  .yb-navtoggle__label { display: none; }
  .yb-navtoggle { padding: 0.55rem 0.7rem; }

  .yb-footer__cols { grid-template-columns: minmax(0, 1fr); }
  .yb-footer__bottom { justify-content: flex-start; }
  .yb-footer__legal { gap: 0.85rem; }
  .yb-chapter { padding-left: 1rem; }
}

/* ---------- 15. Reduced motion ---------- */
@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;
  }

  .yb-js [data-reveal] { opacity: 1; transform: none; }
  .yb-header__progress { display: none; }
  .yb-card:hover { transform: none; }
  .yb-footer__link:hover { transform: none; }
}