/* =========================================================
   易倍体育 · CN 焕新版  /assets/site.css
   共享外壳样式：reset · 变量 · 中文排版 · 刊头 · 页脚 · 基础组件
   ========================================================= */

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

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

body {
  margin: 0;
  min-height: 100%;
  overflow-x: clip;
  background-color: #0B1018;
  background-image:
    radial-gradient(70rem 46rem at 88% -14%, rgba(37, 224, 212, .085), transparent 62%),
    radial-gradient(58rem 40rem at 2% 98%, rgba(255, 155, 47, .06), transparent 60%);
  color: #A9B4C6;
  font-family: "Inter", "Noto Sans SC", system-ui, -apple-system, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: #25E0D4; text-decoration: none; }
a:hover { color: #25E0D4; }

h1, h2, h3, h4, h5 {
  margin: 0 0 .6em;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  font-weight: 700;
  color: #F3EADB;
  line-height: 1.22;
  letter-spacing: .01em;
}

p { margin: 0 0 1.1em; }

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

button { font: inherit; }

::selection { background: #FF9B2F; color: #0B1018; }

:focus-visible {
  outline: 2px solid #25E0D4;
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 变量 ---------- */
:root {
  --c-ink: #0B1018;
  --c-navy: #121B2A;
  --c-masthead: #1B2740;
  --c-cream: #F3EADB;
  --c-mist: #A9B4C6;
  --c-cyan: #25E0D4;
  --c-cyan-deep: #0E8B8F;
  --c-amber: #FF9B2F;
  --c-amber-deep: #C4600F;
  --c-red: #E24B4B;
  --c-green: #4ECB8F;
  --c-line: #263349;
  --line-hair: rgba(38, 51, 73, .62);
  --line-soft: rgba(38, 51, 73, .38);

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --font-body: "Inter", "Noto Sans SC", system-ui, -apple-system, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-data: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, "Courier New", monospace;

  --shell: min(1240px, 100% - 2.5rem);
  --ease-out: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 容器与排版工具 ---------- */
.shell {
  width: var(--shell);
  margin-inline: auto;
}

#main-content { scroll-margin-top: 6.5rem; }

.measure { max-width: 68ch; }

.lede {
  max-width: 46ch;
  margin: 0 0 1.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.75vw, 1.32rem);
  line-height: 1.7;
  color: rgba(243, 234, 219, .86);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--c-cyan);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin: 0 0 1.75rem;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--line-hair);
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.3rem, 2.5vw, 1.9rem);
}

.section-index {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
  color: rgba(169, 180, 198, .5);
}

.rule {
  height: 1px;
  margin: clamp(2rem, 5vw, 3.5rem) 0;
  border: 0;
  background: var(--line-hair);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .65rem;
  border: 1px solid rgba(37, 224, 212, .35);
  border-radius: 2px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.metric {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -.01em;
  color: var(--c-cyan);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.35rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .1em;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.btn--action {
  background: var(--c-amber);
  border-color: var(--c-amber);
  color: #1A1005;
}

.btn--action:hover {
  background: #FFB45C;
  border-color: #FFB45C;
  color: #1A1005;
}

.btn--action:active {
  background: var(--c-amber-deep);
  border-color: var(--c-amber-deep);
  color: var(--c-cream);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(169, 180, 198, .34);
  color: var(--c-cream);
}

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

.btn--sm { padding: .55rem 1rem; font-size: .8rem; }

/* ---------- 跳至主要内容 ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -120px;
  z-index: 200;
  padding: .75rem 1.25rem;
  background: var(--c-cyan);
  color: #04121A;
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .06em;
  border-radius: 2px;
  transition: top .2s var(--ease-out);
}

.skip-link:focus { top: 1rem; color: #04121A; }

/* =========================================================
   刊头
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(11, 16, 24, .95);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line-hair);
}

/* 顶部数据导轨 */
.header-rail {
  max-height: 48px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(
    90deg,
    rgba(37, 224, 212, .07),
    rgba(11, 16, 24, 0) 42%,
    rgba(11, 16, 24, 0) 58%,
    rgba(255, 155, 47, .07)
  );
  transition: max-height .32s var(--ease-out), opacity .22s ease, border-color .3s ease;
}

.site-header[data-collapsed="true"] .header-rail {
  max-height: 0;
  opacity: 0;
  border-color: transparent;
}

.rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .55rem 0;
}

.rail-item {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .14em;
  color: rgba(169, 180, 198, .72);
  white-space: nowrap;
}

.rail-item--end { text-align: right; }

.pulse {
  width: 6px;
  height: 6px;
  margin-right: .6rem;
  flex: none;
  border-radius: 50%;
  background: var(--c-cyan);
  animation: eb-pulse 2.4s infinite;
}

@keyframes eb-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(37, 224, 212, .55); }
  70%  { box-shadow: 0 0 0 8px rgba(37, 224, 212, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 224, 212, 0); }
}

/* 刊头网格 */
.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  grid-template-areas:
    ".    brand  cta"
    "nav  nav    nav";
  align-items: center;
  column-gap: 1.5rem;
  row-gap: .35rem;
  padding: 1.15rem 0 .65rem;
  transition: padding .32s var(--ease-out);
}

/* 品牌 */
.brand {
  grid-area: brand;
  justify-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 0;
  color: var(--c-cream);
  text-align: center;
  line-height: 1;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  letter-spacing: .18em;
  text-indent: .18em;
  color: var(--c-cream);
  transition: font-size .32s var(--ease-out), letter-spacing .32s var(--ease-out);
}

.brand-sub {
  display: block;
  margin-top: .55rem;
  padding-top: .5rem;
  border-top: 1px solid var(--line-hair);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .3em;
  text-indent: .3em;
  color: rgba(169, 180, 198, .55);
  white-space: nowrap;
  transition: margin .3s ease, padding .3s ease, border-color .3s ease;
}

/* 桌面行动点 */
.header-cta {
  grid-area: cta;
  justify-self: end;
}

/* 移动开关 */
.nav-toggle {
  grid-area: toggle;
  display: none;
  align-items: center;
  gap: .6rem;
  padding: .55rem .85rem;
  background: transparent;
  border: 1px solid rgba(169, 180, 198, .3);
  border-radius: 2px;
  color: var(--c-cream);
  cursor: pointer;
  transition: border-color .2s ease, color .2s ease;
}

.nav-toggle:hover { border-color: var(--c-cyan); color: var(--c-cyan); }

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 16px;
}

.nav-toggle-bars i {
  display: block;
  height: 1.5px;
  background: var(--c-amber);
  transition: transform .24s var(--ease-out);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

.nav-toggle-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
}

/* 导航 */
.site-nav {
  grid-area: nav;
  justify-self: center;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(.5rem, 2.2vw, 2rem);
  list-style: none;
}

.nav-list > li > a {
  position: relative;
  display: inline-block;
  padding: .45rem .15rem .55rem;
  color: var(--c-mist);
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-decoration: none;
  transition: color .2s ease;
}

.nav-list > li > a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--c-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease-out);
}

.nav-list > li > a:hover { color: var(--c-cream); }
.nav-list > li > a:hover::after { transform: scaleX(1); }

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

.nav-list > li > a[aria-current="page"]::after {
  height: 2px;
  background: var(--c-amber);
  transform: scaleX(1);
}

.nav-item--action { display: none; }

/* 阅读进度条 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 2;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-amber));
  pointer-events: none;
}

/* 滚动收拢态 */
.site-header[data-collapsed="true"] .header-inner {
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas: "brand nav cta";
  padding: .55rem 0;
  row-gap: 0;
}

.site-header[data-collapsed="true"] .brand {
  justify-self: start;
  flex-direction: row;
  align-items: baseline;
  gap: .75rem;
  text-align: left;
}

.site-header[data-collapsed="true"] .brand-name {
  font-size: 1.15rem;
  letter-spacing: .12em;
  text-indent: .12em;
}

.site-header[data-collapsed="true"] .brand-sub {
  margin: 0;
  padding: 0;
  border-color: transparent;
  font-size: 10px;
  letter-spacing: .2em;
  text-indent: .2em;
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  margin-top: clamp(4rem, 10vw, 8rem);
  background: var(--c-navy);
  border-top: 1px solid var(--line-hair);
  color: var(--c-mist);
}

.site-footer::before {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--c-amber), var(--c-cyan) 55%, transparent);
  opacity: .55;
}

.footer-shell {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 2rem;
}

.footer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .6rem 1.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--line-hair);
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: .16em;
  color: var(--c-cream);
}

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

.footer-tagline {
  margin: 0;
  font-size: .9rem;
  color: rgba(169, 180, 198, .75);
}

.footer-icp {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(169, 180, 198, .55);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2.5rem 2rem;
  padding: 2.5rem 0;
}

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

.footer-col-title {
  margin: 0 0 1rem;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-amber);
}

.footer-links,
.footer-meta {
  display: grid;
  gap: .55rem;
  list-style: none;
}

.footer-links { font-size: .92rem; }

.footer-links a {
  color: var(--c-mist);
  text-decoration: none;
  transition: color .2s ease, padding-left .2s ease;
}

.footer-links a:hover {
  color: var(--c-cyan);
  padding-left: .3rem;
}

.footer-meta li {
  font-size: .88rem;
  color: rgba(169, 180, 198, .68);
  word-break: break-word;
}

.footer-meta li:first-child {
  font-family: var(--font-data);
  font-size: .84rem;
  letter-spacing: .02em;
  color: var(--c-cyan);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .6rem 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-hair);
  font-size: .82rem;
  color: rgba(169, 180, 198, .55);
}

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

/* 右下角磁吸反馈入口 */
.magnet-link {
  position: fixed;
  right: clamp(.85rem, 2.5vw, 1.75rem);
  bottom: clamp(.85rem, 2.5vw, 1.75rem);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .7rem 1.1rem;
  background: transparent;
  border: 0;
  color: var(--c-cream);
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-decoration: none;
  isolation: isolate;
  transition: color .2s ease;
}

.magnet-link::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(18, 27, 42, .94);
  border: 1px solid rgba(37, 224, 212, .38);
  border-radius: 2px;
  transform: skewX(-7deg);
  transition: border-color .2s ease, background .2s ease;
}

.magnet-link:hover { color: var(--c-cyan); }
.magnet-link:hover::before { border-color: var(--c-cyan); }

.magnet-link__dot {
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--c-amber);
}

/* =========================================================
   基础内容组件
   ========================================================= */
.panel {
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--c-navy);
  border: 1px solid var(--line-hair);
  border-radius: 2px;
}

.paper {
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--c-cream);
  color: #1A2233;
  border-radius: 2px;
}

.paper h2,
.paper h3 { color: #101827; }

.paper a { color: var(--c-amber-deep); }

.data-list {
  list-style: none;
  border-top: 1px solid var(--line-hair);
}

.data-list li {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 1rem;
  padding: .85rem .1rem;
  border-bottom: 1px solid var(--line-hair);
  font-size: .95rem;
}

.data-list .data-value {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  color: var(--c-cyan);
}

/* 图片容器基础规则 */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(140deg, var(--c-masthead), var(--c-navy) 70%);
  border: 1px solid var(--line-hair);
  border-radius: 2px;
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(37, 224, 212, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 224, 212, .07) 1px, transparent 1px);
  background-size: 40px 40px;
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

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

/* 滚动显现 */
.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity .24s var(--ease-out),
    transform .24s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

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

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  :root { --shell: min(1240px, 100% - 2rem); }

  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand toggle"
      "nav   nav";
    padding: .9rem 0;
    row-gap: .7rem;
  }

  .brand {
    justify-self: start;
    align-items: flex-start;
    text-align: left;
  }

  .brand-name { letter-spacing: .14em; text-indent: .14em; }

  .brand-sub {
    margin-top: .4rem;
    padding-top: 0;
    border-color: transparent;
    font-size: 10px;
    letter-spacing: .22em;
    text-indent: .22em;
  }

  .header-cta { display: none; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    justify-self: stretch;
    display: none;
    padding: .35rem 0 .75rem;
    border-top: 1px solid var(--line-hair);
  }

  .site-nav[data-open="true"] { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list > li > a {
    display: block;
    padding: .85rem .25rem;
    border-bottom: 1px solid var(--line-soft);
    letter-spacing: .12em;
  }

  .nav-list > li > a::after { display: none; }

  .nav-list > li > a[aria-current="page"] {
    padding-left: .9rem;
    color: var(--c-amber);
  }

  .nav-list > li > a[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 18px;
    transform: translateY(-50%);
    background: var(--c-amber);
  }

  .nav-item--action {
    display: block;
    padding: .9rem 0 .25rem;
  }

  .nav-item--action .btn { width: 100%; }

  /* 移动端禁用收拢态 */
  .site-header[data-collapsed="true"] .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand toggle"
      "nav   nav";
    padding: .9rem 0;
    row-gap: .7rem;
  }

  .site-header[data-collapsed="true"] .brand {
    justify-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    text-align: left;
  }

  .site-header[data-collapsed="true"] .brand-name {
    font-size: clamp(1.5rem, 6vw, 1.9rem);
    letter-spacing: .14em;
    text-indent: .14em;
  }

  .site-header[data-collapsed="true"] .brand-sub {
    margin-top: .4rem;
    font-size: 10px;
  }
}

@media (max-width: 620px) {
  body { font-size: 16px; }

  .rail-item { font-size: 11px; letter-spacing: .1em; }
  .rail-item--end { display: none; }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
    padding: 2rem 0;
  }

  .footer-icp { margin-left: 0; }

  .footer-base { flex-direction: column; }

  .data-list li {
    grid-template-columns: minmax(0, 1fr) auto;
    row-gap: .3rem;
  }

  .magnet-link { padding: .6rem .9rem; font-size: .78rem; }
}

/* ---------- 无障碍：降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

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

  .scroll-progress { transition: none; }
}