/* =========================================================
   易倍体育 · 共享站点样式 /assets/site.css
   深墨绿底 + 荧光青索引 + 橙红标记 + 蓝图直角网格
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body,
h1, h2, h3, h4, h5, h6,
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, input, select, textarea { font: inherit; color: inherit; }

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

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 珠宝色 / 墨绿体系 */
  --ink-950: #061814;
  --ink-900: #08201B;
  --ink-800: #0B2A23;
  --line: #123B32;
  --line-lit: rgba(47, 243, 208, 0.42);
  --aqua: #2FF3D0;
  --aqua-soft: #9DFFEA;
  --flare: #FF5A36;
  --steel: #6F8299;
  --mist: #B7C6D6;
  --ivory: #EDF7F4;
  --wine: #4A1F2C;
  --indigo: #242A5C;

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system,
    "Segoe UI", Roboto, sans-serif;
  --font-display: "Barlow Condensed", "Oswald", "PingFang SC",
    "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei",
    system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace,
    SFMono-Regular, Menlo, Consolas, "PingFang SC", monospace;

  /* 度量 */
  --max: 1280px;
  --gutter: clamp(20px, 4.4vw, 72px);
  --gap: clamp(16px, 2vw, 32px);
  --radius: 0px;

  /* 动效 */
  --dur: 180ms;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--ink-950);
  color: var(--ivory);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ivory);
}

h1 { font-size: clamp(32px, 5vw, 72px); }
h2 { font-size: clamp(24px, 3vw, 40px); }
h3 { font-size: clamp(18px, 2vw, 24px); letter-spacing: -0.01em; }

p { color: var(--mist); }

strong, b { color: var(--ivory); font-weight: 700; }

::selection {
  background: var(--aqua);
  color: #04120F;
}

:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 3px;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--aqua);
  color: #04120F;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background:
    linear-gradient(180deg, rgba(6, 24, 20, 0.98), rgba(6, 24, 20, 0.88));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.site-header[data-stuck] {
  border-bottom-color: var(--line-lit);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  width: 100%;
  max-width: var(--max);
  min-height: 72px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--ivory);
}

.brand-glyph {
  position: relative;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line-lit);
  transition: border-color var(--dur) var(--ease);
}

.brand-glyph i {
  position: absolute;
  background: var(--aqua);
  transition: background-color var(--dur) var(--ease);
}

.brand-glyph i:nth-child(1) { width: 13px; height: 1px; }
.brand-glyph i:nth-child(2) { width: 1px; height: 13px; }

.brand:hover .brand-glyph { border-color: var(--aqua); }
.brand:hover .brand-glyph i { background: var(--aqua-soft); }

.brand-text { display: block; }

.brand-name {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ivory);
}

.brand-tag {
  display: block;
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.16em;
  color: var(--steel);
  white-space: nowrap;
}

/* 中部坐标轴 */
.header-axis {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.axis-line {
  position: relative;
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--line) 10%,
    var(--line) 90%,
    transparent
  );
}

.axis-line::before,
.axis-line::after {
  content: "";
  position: absolute;
  top: -3px;
  width: 1px;
  height: 7px;
  background: var(--line);
}

.axis-line::before { left: 0; }
.axis-line::after { right: 0; }

.axis-index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: rgba(183, 198, 214, 0.45);
  tabular-nums: 1;
}

/* 导航 */
.header-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 24px);
  flex: 0 0 auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.1vw, 16px);
}

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--mist);
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--aqua);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-list a:hover { color: var(--ivory); }
.nav-list a:hover::after { transform: scaleX(1); }

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

.nav-list a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--flare);
}

.header-cta { flex: 0 0 auto; }

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ivory);
  transition: border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: var(--line-lit); color: var(--aqua-soft); }

.nav-toggle-bars {
  display: grid;
  gap: 5px;
  width: 16px;
}

.nav-toggle-bars i {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform var(--dur) var(--ease),
    opacity var(--dur) var(--ease);
}

.nav-toggle[data-open] { border-color: var(--aqua); color: var(--aqua); }
.nav-toggle[data-open] .nav-toggle-bars i:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[data-open] .nav-toggle-bars i:last-child { transform: translateY(-3px) rotate(-45deg); }

/* 阅读进度线 */
.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--aqua), var(--aqua-soft) 60%, var(--flare));
  pointer-events: none;
}

/* ---------- 6. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 11px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--ivory);
  transition: background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.btn--primary {
  background: var(--aqua);
  border-color: var(--aqua);
  color: #04120F;
}

.btn--primary:hover {
  background: var(--aqua-soft);
  border-color: var(--aqua-soft);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line-lit);
  color: var(--aqua);
}

.btn--ghost:hover {
  border-color: var(--aqua);
  color: var(--aqua-soft);
  transform: translateY(-2px);
}

/* ---------- 7. 容器 / 区块 / 网格 ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 6vw, 96px); }
.section--tight { padding-block: clamp(32px, 4vw, 56px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(32px, 4vw, 56px);
}

/* ---------- 8. 索引与文字工具 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--aqua);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 1px;
  background: currentColor;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs {
  padding-block: 20px;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.breadcrumbs a { color: var(--mist); transition: color var(--dur) var(--ease); }
.breadcrumbs a:hover { color: var(--aqua); }
.breadcrumbs [aria-current="page"] { color: var(--ivory); }

/* ---------- 10. 正文容器 ---------- */
.prose {
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

.prose p { color: var(--mist); font-size: 17px; }
.prose p + p { margin-top: 1.05em; }

.prose h2 {
  margin: 1.9em 0 0.6em;
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.2;
}

.prose h3 {
  margin: 1.6em 0 0.5em;
  font-size: 20px;
  color: var(--ivory);
}

.prose ul, .prose ol {
  margin: 1.1em 0;
  padding-left: 1.15em;
  list-style: none;
}

.prose li { position: relative; padding-left: 14px; }
.prose li + li { margin-top: 0.5em; }

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 1px;
  background: var(--aqua);
}

.prose a {
  color: var(--aqua);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.prose a:hover { color: var(--aqua-soft); }

/* ---------- 11. 卡片 / 标签 / 芯片 ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.2vw, 28px);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--line-lit);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
}

.tag--aqua { color: var(--aqua); border-color: var(--line-lit); }
.tag--flare { color: var(--flare); border-color: rgba(255, 90, 54, 0.45); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.chip:hover { color: var(--ivory); border-color: var(--line-lit); }

.chip[aria-pressed="true"],
.chip[data-active] {
  background: rgba(47, 243, 208, 0.1);
  border-color: var(--aqua);
  color: var(--aqua);
}

/* ---------- 12. 数据条 ---------- */
.data-band {
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.data-band > * {
  flex: 1 1 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 18px;
  border-right: 1px solid var(--line);
}

.data-band > *:last-child { border-right: 0; }

.data-band b,
.data-band strong {
  color: var(--aqua);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ---------- 13. 图片容器基础 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(150deg, rgba(47, 243, 208, 0.1), transparent 44%),
    linear-gradient(180deg, var(--ink-800), var(--ink-950));
}

.media img,
.media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }

.media--grid::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(47, 243, 208, 0.16) 1px, transparent 1px),
    linear-gradient(180deg, rgba(47, 243, 208, 0.11) 1px, transparent 1px);
  background-size: 33.333% 100%, 100% 33.333%;
  opacity: 0.75;
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 8vw, 120px);
  border-top: 1px solid var(--line-lit);
  background:
    radial-gradient(900px 320px at 8% 0%, rgba(36, 42, 92, 0.55), transparent 72%),
    radial-gradient(760px 300px at 92% 6%, rgba(74, 31, 44, 0.5), transparent 72%),
    linear-gradient(180deg, rgba(111, 130, 153, 0.1), transparent 40%),
    var(--ink-950);
  color: var(--ivory);
}

.footer-inner {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 72px) var(--gutter) 0;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.7fr);
  gap: clamp(32px, 4vw, 64px);
  padding-bottom: clamp(32px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
}

.footer-name {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ivory);
}

.footer-name::after {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  margin-top: 14px;
  background: linear-gradient(90deg, var(--aqua), var(--flare));
}

.footer-tag {
  margin-top: 16px;
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-index {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--aqua);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 32px);
}

.footer-heading {
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--aqua);
}

.footer-list {
  display: grid;
  gap: 10px;
}

.footer-list a {
  display: inline-block;
  font-size: 14px;
  color: var(--mist);
  transition: color var(--dur) var(--ease),
    padding-left var(--dur) var(--ease);
}

.footer-list a:hover {
  color: var(--aqua-soft);
  padding-left: 4px;
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px 32px;
  margin-top: clamp(24px, 3vw, 40px);
  padding-top: clamp(24px, 3vw, 40px);
  border-top: 1px solid var(--line);
}

.contact-row { display: grid; gap: 4px; }

.contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

.contact-value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ivory);
  overflow-wrap: anywhere;
}

.contact-note {
  grid-column: 1 / -1;
  max-width: 72ch;
  padding-left: 12px;
  border-left: 2px solid var(--flare);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 40px);
  padding: 20px 0 28px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1100px) {
  .header-axis { display: none; }
  .header-inner { justify-content: space-between; }
  .header-nav { gap: 12px; }
  .nav-list { gap: 4px; }
  .nav-list a { font-size: 13px; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .header-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 20px;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    background: var(--ink-900);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .header-nav[data-open] { display: flex; }

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

  .nav-list li { border-bottom: 1px solid var(--line); }

  .nav-list a {
    display: block;
    padding: 14px 12px;
    font-size: 16px;
  }

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

  .nav-list a[aria-current="page"] {
    color: var(--aqua);
    border-left: 2px solid var(--flare);
    background: rgba(47, 243, 208, 0.06);
  }

  .header-cta {
    width: 100%;
    margin-top: 18px;
    padding-block: 14px;
  }

  .footer-top { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .brand-tag { display: none; }
  .header-inner { min-height: 64px; }
  .footer-nav { grid-template-columns: 1fr; }
  .data-band > * {
    flex: 1 1 100%;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .data-band > *:last-child { border-bottom: 0; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 16. 动效偏好 ---------- */
@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;
    scroll-behavior: auto !important;
  }

  .card:hover,
  .btn:hover { transform: none; }
}