@charset "utf-8";
/* ==========================================================
   云开赛事 Shared Site CSS — /assets/site.css
   设计基调：赛事数据档案终端 / 深蓝底 + 电光青 + 活力橙
   ========================================================== */

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

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

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

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

/* ---------- 2. Design Tokens ---------- */
:root {
  --color-bg: #1B2A4A;
  --color-bg-deep: #131F36;
  --color-bg-card: rgba(230, 230, 230, 0.04);
  --color-cyan: #00E5FF;
  --color-orange: #FF6B35;
  --color-text: #E6E6E6;
  --color-muted: #8D9AA8;
  --color-warn: #FFD166;
  --color-success: #06D6A0;
  --color-light: #F5F7FA;
  --color-border: rgba(230, 230, 230, 0.12);
  --font-heading: Impact, '黑体', 'Heiti SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Source Han Serif SC', 'Songti SC', '宋体', 'Noto Serif CJK SC', serif;
  --font-mono: 'Roboto Mono', 'Courier New', 'Noto Sans Mono CJK SC', monospace;
  --container-w: 1280px;
  --header-bar-h: 64px;
  --header-nav-h: 48px;
  --radius: 4px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.28);
  --tr-fast: 0.2s ease;
  --tr: 0.3s ease;
}

/* ---------- 3. Global Element Styles ---------- */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color var(--tr-fast);
}

a:hover {
  color: var(--color-orange);
}

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
}

::selection {
  background: var(--color-cyan);
  color: var(--color-bg-deep);
}

[id="main-content"] {
  scroll-margin-top: 128px;
  outline: none;
}

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

/* ---------- 4. Container ---------- */
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* ---------- 5. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  background: var(--color-cyan);
  color: var(--color-bg-deep);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  transition: top var(--tr);
}

.skip-link:focus {
  top: 0.75rem;
  color: var(--color-bg-deep);
}

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  line-height: 1.4;
  border-radius: var(--radius);
  border: 1px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--tr), color var(--tr), border-color var(--tr), box-shadow var(--tr), transform var(--tr);
}

.btn--cyan {
  background: var(--color-cyan);
  color: var(--color-bg-deep);
  font-weight: 700;
}

.btn--cyan:hover {
  background: #33eaff;
  color: var(--color-bg-deep);
  box-shadow: 0 4px 16px rgba(0, 229, 255, 0.35);
  transform: translateY(-1px);
}

.btn--accent {
  background: var(--color-orange);
  color: var(--color-bg-deep);
  font-weight: 700;
}

.btn--accent:hover {
  background: #ff8255;
  color: var(--color-bg-deep);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

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

.btn--sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.75rem;
}

.btn--lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

/* ---------- 7. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 5;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-orange));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

.site-header__bar {
  background: var(--color-bg-deep);
  border-bottom: 1px solid var(--color-border);
}

.site-header__bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-bar-h);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
}

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

.site-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-orange));
  color: var(--color-bg-deep);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius);
  letter-spacing: 0.05em;
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.site-brand__cn {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

.site-brand__en {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  line-height: 1.2;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-header__status {
  display: none;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  white-space: nowrap;
}

@media (min-width: 768px) {
  .site-header__status {
    display: inline-flex;
  }
}

.site-header__status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: site-status-pulse 2.4s ease-in-out infinite;
}

@keyframes site-status-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(6, 214, 160, 0.5);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(6, 214, 160, 0);
  }
}

.site-header__nav {
  position: relative;
}

.site-header__nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-nav-h);
}

/* ---------- 8. Navigation ---------- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.625rem 0.75rem;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.4;
  border-bottom: 2px solid transparent;
  transition: color var(--tr-fast), border-color var(--tr-fast);
}

.site-nav__link:hover {
  color: var(--color-text);
}

.site-nav__label {
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-muted);
  opacity: 0.7;
  transition: color var(--tr-fast), opacity var(--tr-fast);
}

.site-nav__link:hover .site-nav__num,
.site-nav__link[aria-current="page"] .site-nav__num {
  color: var(--color-cyan);
  opacity: 1;
}

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

.site-nav-toggle {
  display: none;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-card);
}

.site-nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: background-color var(--tr-fast);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar {
  background: var(--color-cyan);
}

@media (max-width: 767px) {
  .site-header__nav-inner {
    justify-content: flex-end;
  }

  .site-nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 90;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 0.5rem 1.25rem 1rem;
  }

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

  .site-nav__link {
    padding: 0.875rem 0.25rem;
    border-bottom: 1px solid rgba(230, 230, 230, 0.06);
  }

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

/* ---------- 9. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-border);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-cyan) 0%, transparent 35%, var(--color-orange) 100%);
  opacity: 0.6;
  pointer-events: none;
}

.site-footer__grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  padding: 3.5rem 0 2.5rem;
}

@media (min-width: 640px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 1.8fr 1fr 1fr 1.6fr;
  }
}

.site-footer__brand {
  min-width: 0;
}

.site-footer__logo {
  display: inline-flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.site-footer__logo-cn {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.1em;
  line-height: 1.1;
}

.site-footer__logo-en {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-muted);
  letter-spacing: 0.35em;
  text-transform: uppercase;
}

.site-footer__desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  max-width: 32ch;
  line-height: 1.7;
}

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

.site-footer__heading {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 1rem;
  letter-spacing: 0.04em;
}

.site-footer__heading-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-cyan);
  opacity: 0.8;
}

.site-footer__links li {
  margin-bottom: 0.5rem;
}

.site-footer__links a {
  color: var(--color-muted);
  font-size: 0.875rem;
  transition: color var(--tr-fast), padding-left var(--tr-fast);
}

.site-footer__links a:hover {
  color: var(--color-cyan);
  padding-left: 4px;
}

.site-footer__contact {
  min-width: 0;
}

.site-footer__contact-item {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.875rem;
}

.site-footer__contact-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  text-transform: uppercase;
  margin-bottom: 0.125rem;
}

.site-footer__contact-value {
  font-size: 0.875rem;
  color: var(--color-text);
  word-break: break-all;
}

.site-footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 0;
  border-top: 1px solid rgba(230, 230, 230, 0.08);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
}

@media (min-width: 640px) {
  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

/* ---------- 10. Section, Grid, Card, Tag ---------- */
.section {
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.section--alt {
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

.section-head__num {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-cyan);
  line-height: 1;
  letter-spacing: -0.04em;
}

.section-head__title {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.section-head__desc {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  text-align: right;
  letter-spacing: 0.04em;
  align-self: flex-end;
  max-width: 32ch;
}

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

@media (min-width: 640px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--tr), box-shadow var(--tr), transform var(--tr);
}

.card:hover {
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.card__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-bottom: 0.5rem;
}

.card__value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-cyan);
  line-height: 1.2;
}

.card__desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-top: 0.5rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.4;
  letter-spacing: 0.04em;
  border-radius: 999px;
  border: 1px solid var(--color-cyan);
  color: var(--color-cyan);
}

.tag--hot {
  background: var(--color-orange);
  border-color: var(--color-orange);
  color: var(--color-bg-deep);
  font-weight: 700;
}

.tag--muted {
  border-color: var(--color-muted);
  color: var(--color-muted);
}

/* ---------- 11. Breadcrumb, Page Hero, Divider, Image Frame ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  padding: 0.875rem 0;
}

.breadcrumb a {
  color: var(--color-cyan);
}

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

.breadcrumb__sep {
  opacity: 0.5;
}

.page-hero {
  padding: clamp(2.5rem, 6vw, 5rem) 0;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(135deg, var(--color-bg-deep) 0%, var(--color-bg) 100%);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  margin-bottom: 0.75rem;
  position: relative;
}

.page-hero__desc {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 56ch;
  position: relative;
}

.divider-line {
  height: 2px;
  border: none;
  background: linear-gradient(90deg, var(--color-cyan) 0%, transparent 40%, var(--color-orange) 100%);
  margin: 2.5rem 0;
}

.img-frame {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg-deep);
}

.img-frame::before {
  content: '';
  display: block;
  padding-bottom: 62.5%;
}

.img-frame--square::before {
  padding-bottom: 100%;
}

.img-frame--wide::before {
  padding-bottom: 42%;
}

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

/* ---------- 12. Scroll Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- 13. Reduced Motion ---------- */
@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;
  }

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

  .site-header__status-dot {
    animation: none;
  }
}