/* =========================================================
   云开体育 · /assets/site.css
   全站共享样式：Reset / Tokens / 头部 / 页脚 / 基础组件
   ========================================================= */

/* ---------- 1 · Reset ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-space);
  background-image:
    radial-gradient(circle at 85% 10%, rgba(57, 255, 20, 0.07), transparent 42%),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(57, 255, 20, 0.02) 80px),
    repeating-linear-gradient(0deg, transparent 0 79px, rgba(57, 255, 20, 0.025) 80px);
  color: var(--color-cream);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
  flex: 1 0 auto;
}

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

a {
  color: var(--color-neon);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul, ol {
  list-style-position: inside;
}

address {
  font-style: normal;
}

::selection {
  background: rgba(57, 255, 20, 0.22);
  color: var(--color-cream);
}

/* ---------- 2 · Tokens ---------- */
:root {
  --color-space: #0B1B3D;
  --color-neon: #39FF14;
  --color-heat: #FF6B35;
  --color-slate: #4A5568;
  --color-moss: #6B8E23;
  --color-terra: #D27D56;
  --color-cream: #F5F5F0;
  --color-charcoal: #1A1D23;

  --font-headline: 'Barlow Condensed', 'Impact', 'Noto Sans SC', sans-serif;
  --font-number: 'Roboto Mono', 'Courier New', monospace;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --container-max: 76rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  --duration-fast: 80ms;
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --border-slate: 1px solid rgba(74, 85, 104, 0.35);
}

/* ---------- 3 · 焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 3px;
}

/* ---------- 4 · 中文排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.18;
  color: var(--color-cream);
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

.page-title {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(2.25rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--color-cream);
}

.page-lead {
  max-width: 60ch;
  margin-top: var(--space-4);
  color: rgba(245, 245, 240, 0.7);
}

/* ---------- 5 · 布局容器与网格 ---------- */
.container {
  width: min(calc(100% - 2 * var(--space-5)), var(--container-max));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-8);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-5);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: 1 / -1; }

/* ---------- 6 · 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 1px solid transparent;
  border-radius: 2px;
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-neon);
  color: var(--color-space);
}

.btn-primary:hover {
  background-color: transparent;
  border-color: var(--color-neon);
  color: var(--color-neon);
}

.btn-ghost {
  border-color: var(--color-slate);
  color: var(--color-cream);
}

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

/* ---------- 7 · 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-6);
  padding: var(--space-3) var(--space-4);
  background: rgba(26, 29, 35, 0.6);
  border-left: 2px solid var(--color-neon);
  font-family: var(--font-number);
  font-size: 0.75rem;
  color: var(--color-slate);
  list-style: none;
}

.breadcrumbs li + li::before {
  content: '/';
  margin: 0 var(--space-2);
  color: var(--color-slate);
}

.breadcrumbs a {
  color: var(--color-slate);
  transition: color var(--duration-fast) var(--ease-out);
}

.breadcrumbs a:hover {
  color: var(--color-neon);
  text-decoration: none;
}

.breadcrumbs [aria-current="page"] {
  color: var(--color-cream);
}

/* ---------- 8 · 标签与数据卡片 ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-number);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-heat);
}

.section-label::before {
  content: '';
  width: 2rem;
  height: 2px;
  background: var(--color-neon);
}

.data-card {
  padding: var(--space-5);
  background: rgba(11, 27, 61, 0.5);
  border: var(--border-slate);
  border-radius: 4px;
}

/* ---------- 9 · 图片占位容器 ---------- */
.img-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(26, 29, 35, 0.92), rgba(11, 27, 61, 0.84)),
    repeating-linear-gradient(90deg, transparent 0 39px, rgba(57, 255, 20, 0.06) 40px);
  border: var(--border-slate);
}

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

.img-stage::after {
  content: attr(data-label);
  font-family: var(--font-number);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(245, 245, 240, 0.32);
}

/* ---------- 10 · 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 27, 61, 0.93);
  backdrop-filter: blur(10px);
  border-bottom: var(--border-slate);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 40;
  padding: var(--space-2) var(--space-4);
  background: var(--color-neon);
  color: var(--color-space);
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 0 0 4px 4px;
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:hover {
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 30;
  width: 100%;
  height: 3px;
  background: var(--color-neon);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.5);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

.header-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-2) var(--space-5);
  border-bottom: 1px solid rgba(74, 85, 104, 0.25);
  box-shadow: 0 1px 0 rgba(74, 85, 104, 0.15);
  font-family: var(--font-number);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-slate);
}

.topbar-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.topbar-season::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-neon);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.55);
}

.topbar-zone {
  color: var(--color-moss);
}

.topbar-zone::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-moss);
  box-shadow: 0 0 8px rgba(107, 142, 35, 0.55);
}

.masthead {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-6) var(--space-5);
}

.masthead-brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-cream);
}

.masthead-brand:hover {
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 0.95;
  letter-spacing: 0.04em;
  color: var(--color-cream);
}

.brand-dot {
  color: var(--color-neon);
}

.brand-tagline {
  font-family: var(--font-number);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-slate);
  white-space: nowrap;
}

.masthead-cta {
  position: absolute;
  right: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-neon);
  background: rgba(57, 255, 20, 0.05);
  color: var(--color-neon);
  font-family: var(--font-number);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  white-space: nowrap;
  transition:
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.masthead-cta::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-heat);
  box-shadow: 0 0 6px rgba(255, 107, 53, 0.65);
}

.masthead-cta:hover {
  background: var(--color-neon);
  color: var(--color-space);
  text-decoration: none;
}

.masthead-cta:hover::before {
  background: var(--color-space);
  box-shadow: none;
}

.nav-zone {
  border-top: 1px solid rgba(74, 85, 104, 0.22);
  background:
    repeating-linear-gradient(90deg, transparent 0 119px, rgba(57, 255, 20, 0.03) 120px),
    rgba(8, 20, 42, 0.55);
}

.nav-toggle {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 0 var(--space-5);
}

.nav-link {
  display: inline-block;
  padding: var(--space-3) var(--space-4);
  color: rgba(245, 245, 240, 0.7);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition:
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.nav-link:hover {
  color: var(--color-cream);
  border-bottom-color: var(--color-neon);
  text-decoration: none;
}

.nav-link[aria-current="page"] {
  color: var(--color-neon);
  font-weight: 700;
  border-bottom-color: var(--color-neon);
}

/* ---------- 11 · 页脚 ---------- */
.site-footer {
  background: var(--color-charcoal);
  border-top: 1px solid rgba(74, 85, 104, 0.4);
  color: rgba(245, 245, 240, 0.8);
  font-size: 0.92rem;
}

.footer-main {
  display: grid;
  grid-template-columns: 3fr 1.6fr 1.6fr 2.2fr;
  gap: var(--space-7);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-8) var(--space-5) var(--space-7);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.footer-brand .brand-name {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
}

.footer-tagline {
  font-family: var(--font-number);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-slate);
}

.footer-trust {
  margin-top: var(--space-2);
  max-width: 36ch;
  font-size: 0.86rem;
  line-height: 1.8;
  color: rgba(245, 245, 240, 0.55);
}

.footer-trust strong {
  color: var(--color-terra);
  font-weight: 700;
}

.footer-col,
.footer-nav,
.footer-pages,
.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.footer-heading {
  margin-bottom: var(--space-1);
  font-family: var(--font-number);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-heat);
}

.footer-link {
  padding: var(--space-1) 0;
  color: rgba(245, 245, 240, 0.65);
  font-size: 0.88rem;
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-link:hover {
  color: var(--color-neon);
  text-decoration: none;
}

.footer-contact-line {
  font-family: var(--font-number);
  font-size: 0.82rem;
  line-height: 1.8;
  color: rgba(245, 245, 240, 0.65);
}

a.footer-contact-line:hover {
  color: var(--color-neon);
  text-decoration: none;
}

.footer-bottom {
  background: rgba(9, 14, 24, 0.7);
  border-top: 1px solid rgba(74, 85, 104, 0.28);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-number);
  font-size: 0.73rem;
  color: var(--color-slate);
}

.footer-copy,
.footer-icp {
  white-space: nowrap;
}

[data-year] {
  white-space: nowrap;
}

/* ---------- 12 · 滚动渐入 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 80ms var(--ease-out),
    transform 80ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

html.js-reveal [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 13 · 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-6);
  }

  .footer-contact {
    grid-column: 1 / -1;
    padding-top: var(--space-4);
    border-top: var(--border-slate);
  }
}

@media (max-width: 768px) {
  .site-header {
    position: relative;
  }

  .grid-12 {
    grid-template-columns: 1fr;
  }

  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8 {
    grid-column: auto;
  }

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
  }

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

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-3) var(--space-5);
    border: 0;
    background: transparent;
    color: var(--color-cream);
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
  }

  .nav-toggle:hover {
    color: var(--color-neon);
  }

  .nav-toggle-text {
    margin-right: auto;
    margin-left: var(--space-3);
  }

  .nav-toggle-icon {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 22px;
    margin-left: var(--space-3);
  }

  .nav-toggle-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-cream);
    transition:
      transform var(--duration-fast) var(--ease-out),
      opacity var(--duration-fast) var(--ease-out),
      background-color var(--duration-fast) var(--ease-out);
  }

  .nav-toggle:hover .nav-toggle-line {
    background: var(--color-neon);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-link {
    padding: var(--space-3) var(--space-5);
    border-bottom: 1px solid rgba(74, 85, 104, 0.22);
    color: rgba(245, 245, 240, 0.85);
  }

  .nav-link:hover {
    background: rgba(57, 255, 20, 0.05);
    border-bottom-color: rgba(74, 85, 104, 0.22);
  }

  .nav-link[aria-current="page"] {
    background: rgba(57, 255, 20, 0.08);
    border-bottom-color: transparent;
  }
}

@media (max-width: 640px) {
  .header-topbar {
    font-size: 0.62rem;
  }

  .masthead {
    flex-direction: column;
    align-items: center;
  }

  .masthead-cta {
    position: static;
    transform: none;
    margin-top: var(--space-2);
  }
}

@media (max-width: 480px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-7) var(--space-5) var(--space-6);
  }

  .footer-contact {
    grid-column: auto;
    padding-top: 0;
    border-top: 0;
  }

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

/* ---------- 14 · 减少动效 ---------- */
@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;
  }

  .scroll-progress {
    display: none;
  }

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