/* =========================================================
   乐动体育 · 共享样式表 /assets/site.css
   层：reset / 变量 / 头部 / 导航 / 页脚 / 通用组件 / 动效
   ========================================================= */

/* ---------- 0. 变量 ---------- */
:root {
  --c-bg: #0F1A2C;
  --c-card: #16233A;
  --c-text: #F4EFE6;
  --c-sand: #D8CBB5;
  --c-accent: #FF6B35;
  --c-neon: #C6FF00;
  --c-blue: #1E5AA9;
  --c-gold: #FFD700;
  --c-teal: #2E8B8B;
  --c-ink: #1E1E1E;
  --f-body: "Noto Sans SC", "Alibaba PuHuiTi", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --f-display: "Noto Sans SC", "Alibaba PuHuiTi", "PingFang SC", "Microsoft YaHei", sans-serif;
  --f-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
  --max-w: 1240px;
  --z-header: 80;
  --z-pop: 90;
  --z-fixed: 200;
  --radius: 8px;
}

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

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

body {
  margin: 0;
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 900;
  line-height: 1.25;
}

p {
  margin: 0 0 1em;
}

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

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

a {
  color: var(--c-neon);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--c-accent);
}

button {
  font-family: inherit;
}

::selection {
  background: var(--c-neon);
  color: var(--c-bg);
}

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

/* ---------- 2. 容器与布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

@media (min-width: 1024px) {
  .container {
    padding-inline: 2rem;
  }
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 3. 无障碍辅助 ---------- */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 999;
  display: inline-block;
  padding: 0.7rem 1.2rem;
  background: var(--c-neon);
  color: var(--c-bg);
  font-weight: 800;
  border-radius: 4px;
  transition: top 0.2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 0.75rem;
  outline: none;
}

/* ---------- 4. 头部 ---------- */
.site-header {
  position: relative;
  z-index: var(--z-header);
  background: var(--c-bg);
}

.header-topbar {
  background: linear-gradient(90deg, rgba(30, 90, 169, 0.35), rgba(15, 26, 44, 0.2));
  border-bottom: 1px solid rgba(244, 239, 230, 0.06);
}

.header-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 2rem;
}

.badge-china {
  display: inline-block;
  padding: 0.18rem 0.9rem 0.18rem 0.7rem;
  background: rgba(30, 90, 169, 0.65);
  border-left: 3px solid var(--c-neon);
  color: var(--c-neon);
  font-family: var(--f-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.topbar-note {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--c-sand);
  opacity: 0.78;
}

.header-masthead {
  position: relative;
  background-image:
    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: 44px 44px;
}

.header-masthead::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-neon) 55%, var(--c-blue));
}

.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--c-text);
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--c-accent), #E8471D);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 900;
  transform: skewX(-8deg);
  box-shadow: 0.35rem 0.35rem 0 0 rgba(30, 90, 169, 0.7), 0 0 0 2px rgba(198, 255, 0, 0.2);
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text {
  font-family: var(--f-display);
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.brand-en {
  font-family: var(--f-mono);
  font-size: 0.6rem;
  letter-spacing: 0.24em;
  color: var(--c-neon);
  text-transform: uppercase;
}

.masthead-actions {
  position: relative;
}

.btn-focus-team {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 1.1rem 0.55rem 0.75rem;
  background: var(--c-neon);
  color: var(--c-bg);
  font-size: 0.9rem;
  font-weight: 800;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 0 0 0 rgba(198, 255, 0, 0);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-focus-team:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 6px rgba(198, 255, 0, 0.12);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.4rem;
  height: 1.4rem;
  background: var(--c-bg);
  color: var(--c-neon);
  border-radius: 50%;
  font-size: 0.95rem;
  font-weight: 900;
}

.team-popover {
  position: absolute;
  top: calc(100% + 0.85rem);
  right: 0;
  width: 320px;
  max-width: calc(100vw - 2rem);
  padding: 1.2rem 1.25rem;
  background: var(--c-card);
  border: 1px solid rgba(198, 255, 0, 0.25);
  border-radius: var(--radius);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: var(--z-pop);
}

.team-popover[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.popover-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--c-sand);
}

.popover-title-mark {
  width: 0.55rem;
  height: 0.55rem;
  background: var(--c-gold);
  transform: rotate(45deg);
}

.popover-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.popover-tag {
  padding: 0.35rem 0.8rem;
  background: transparent;
  border: 1px solid rgba(30, 90, 169, 0.85);
  color: var(--c-text);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.popover-tag:hover {
  border-color: var(--c-neon);
  color: var(--c-neon);
  background: rgba(198, 255, 0, 0.08);
}

.popover-tag.is-selected {
  background: var(--c-neon);
  color: var(--c-bg);
  border-color: var(--c-neon);
}

.header-navbar {
  position: sticky;
  top: 0;
  z-index: calc(var(--z-header) + 1);
  background: rgba(15, 26, 44, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
}

.nav-main {
  display: flex;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 0.9rem 1.05rem;
  color: var(--c-sand);
  font-size: 0.95rem;
  font-weight: 700;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
  color: var(--c-text);
  background: rgba(30, 90, 169, 0.2);
}

.nav-link[aria-current="page"] {
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

.nav-item-has-sub .nav-sublist {
  position: absolute;
  top: 100%;
  left: 0.5rem;
  min-width: 220px;
  padding: 0.5rem;
  background: var(--c-card);
  border: 1px solid rgba(244, 239, 230, 0.09);
  border-radius: var(--radius);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: calc(var(--z-header) + 2);
}

.nav-item-has-sub:hover .nav-sublist,
.nav-item-has-sub:focus-within .nav-sublist {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-sublink {
  display: block;
  padding: 0.55rem 0.85rem;
  color: var(--c-sand);
  font-size: 0.88rem;
  border-radius: 4px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-sublink:hover {
  color: var(--c-neon);
  background: rgba(30, 90, 169, 0.25);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem;
  background: transparent;
  border: none;
  color: var(--c-text);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 1.5rem;
  height: 3px;
  margin: 3px 0;
  background: var(--c-neon);
  border-radius: 999px;
}

.nav-toggle-label {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 4.5rem;
  background: var(--c-card);
  border-top: 1px solid rgba(244, 239, 230, 0.08);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-blue), var(--c-neon) 50%, var(--c-accent));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
  gap: 2.5rem;
  padding: 3rem 0 2.5rem;
}

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

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

.footer-brand-col .brand {
  margin-bottom: 0.75rem;
}

.brand-footer .brand-mark {
  width: 2.4rem;
  height: 2.4rem;
  font-size: 1.2rem;
}

.brand-footer .brand-text {
  font-size: 1.35rem;
}

.footer-slogan {
  margin: 0.75rem 0;
  font-family: var(--f-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--c-neon);
}

.footer-trust {
  max-width: 34ch;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--c-sand);
}

.footer-heading {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  font-size: 0.95rem;
  font-weight: 800;
  border-bottom: 2px solid rgba(198, 255, 0, 0.35);
}

.footer-links li + li {
  margin-top: 0.4rem;
}

.footer-links a {
  display: inline-block;
  font-size: 0.88rem;
  color: var(--c-sand);
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-links a:hover {
  color: var(--c-neon);
  transform: translateX(3px);
}

.footer-contact {
  display: grid;
  gap: 0.7rem;
}

.footer-contact li {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.contact-label {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-sand);
  opacity: 0.6;
}

.contact-email,
.contact-phone,
.contact-address {
  font-size: 0.9rem;
  color: var(--c-text);
}

.contact-email {
  font-family: var(--f-mono);
  color: var(--c-accent);
}

.footer-note {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--c-sand);
  opacity: 0.85;
}

.footer-bottom {
  background: rgba(15, 26, 44, 0.5);
  border-top: 1px solid rgba(244, 239, 230, 0.08);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 0;
}

.footer-icp,
.footer-copy {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 0.75rem;
  color: var(--c-sand);
}

.back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 95;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: var(--c-card);
  color: var(--c-neon);
  font-size: 1.25rem;
  border: 1px solid rgba(198, 255, 0, 0.5);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--c-neon);
  color: var(--c-bg);
}

/* ---------- 6. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 800;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: var(--c-accent);
  color: var(--c-bg);
  transform: skewX(-8deg);
}

.btn-primary:hover {
  transform: skewX(-8deg) translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 107, 53, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--c-neon);
  border: 1px solid var(--c-neon);
}

.btn-ghost:hover {
  background: rgba(198, 255, 0, 0.1);
}

/* ---------- 7. 信息组件 ---------- */
.card {
  position: relative;
  padding: 1.5rem;
  background: var(--c-card);
  border: 1px solid rgba(244, 239, 230, 0.08);
  border-radius: var(--radius);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1rem;
  bottom: 1rem;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--c-accent), var(--c-neon));
}

.card:hover {
  transform: translateY(-3px) rotate(-0.5deg);
  border-color: rgba(198, 255, 0, 0.28);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-sand);
  background: rgba(216, 203, 181, 0.08);
  border: 1px solid rgba(216, 203, 181, 0.22);
  border-radius: 999px;
}

.tag-glow {
  color: var(--c-neon);
  border-color: rgba(198, 255, 0, 0.45);
  background: rgba(198, 255, 0, 0.07);
}

.data-num {
  font-family: var(--f-mono);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-neon);
  font-variant-numeric: tabular-nums;
}

.data-label {
  margin-top: 0.25rem;
  font-size: 0.82rem;
  color: var(--c-sand);
}

.section-head {
  position: relative;
  margin-bottom: 1.75rem;
}

.section-kicker {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-family: var(--f-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.section-title {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  letter-spacing: 0.01em;
}

.title-vertical {
  display: inline-block;
  writing-mode: vertical-rl;
  margin-left: 0.75rem;
  font-family: var(--f-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-sand);
  opacity: 0.75;
}

.grid-2,
.grid-3 {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.prose {
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
}

.prose h2,
.prose h3 {
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
}

.prose p {
  margin-bottom: 1.25rem;
}

.prose a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 1.25rem 0;
  font-size: 0.85rem;
  color: var(--c-sand);
}

.breadcrumb a {
  color: var(--c-neon);
  font-weight: 600;
}

.breadcrumb a:hover {
  color: var(--c-accent);
}

.breadcrumb .sep {
  font-family: var(--f-mono);
  color: var(--c-sand);
  opacity: 0.5;
}

.breadcrumb [aria-current="page"] {
  color: var(--c-text);
}

.img-frame {
  position: relative;
  overflow: hidden;
  background: var(--c-card);
  border: 1px solid rgba(244, 239, 230, 0.08);
  aspect-ratio: 16 / 9;
}

.img-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(30, 90, 169, 0.35), transparent 45%),
    linear-gradient(315deg, rgba(46, 139, 139, 0.2), transparent 40%),
    repeating-linear-gradient(-45deg, rgba(198, 255, 0, 0.05) 0 1px, transparent 1px 14px);
}

/* ---------- 8. 滚动交互 ---------- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-neon) 70%, var(--c-blue));
  z-index: var(--z-fixed);
  pointer-events: none;
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .navbar-inner {
    justify-content: flex-start;
  }

  .nav-main {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--c-card);
    border-top: 2px solid var(--c-accent);
    box-shadow: 0 18px 32px rgba(0, 0, 0, 0.45);
  }

  .nav-main[data-open] {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 0 1rem;
  }

  .nav-link {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid rgba(244, 239, 230, 0.06);
    border-left: 3px solid transparent;
  }

  .nav-link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--c-neon);
  }

  .nav-item-has-sub .nav-sublist {
    position: static;
    min-width: 0;
    padding: 0.25rem 0.75rem 0.5rem 1rem;
    background: rgba(15, 26, 44, 0.6);
    border: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }
}

@media (max-width: 640px) {
  .topbar-note {
    display: none;
  }

  .masthead-inner {
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  .brand-mark {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.25rem;
  }

  .brand-text {
    font-size: 1.4rem;
  }

  .btn-focus-team {
    padding: 0.45rem 0.9rem 0.45rem 0.6rem;
    font-size: 0.82rem;
  }

  .team-popover {
    width: 300px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-top: 2.25rem;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .back-top {
    right: 1rem;
    bottom: 1rem;
    width: 2.75rem;
    height: 2.75rem;
  }
}

/* ---------- 10. 动效偏好 ---------- */
@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;
    transition-delay: 0s !important;
  }

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