/* ==========================================================================
   HTH赛事入口 · 全站共享样式 /assets/site.css
   深空蓝 × 活力橙 × 荧光绿 · 体育数据竞技气质
   ========================================================================== */

/* ---------- 1. Reset & Custom Properties ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --c-primary-blue: #0A192F;
  --c-secondary-blue: #112240;
  --c-accent-orange: #FF6B35;
  --c-accent-green: #39FF14;
  --c-warm-gray: #F5F0E6;
  --c-text-primary: #FFFFFF;
  --c-text-secondary: #B0B8C4;
  --c-text-accent: #FF6B35;
  --c-border: #1E3A5F;

  --font-display: 'Anton', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --container-max: 1200px;
  --header-h-top: 68px;
  --header-h-nav: 60px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 0.2s;
  --dur-med: 0.4s;
  --dur-slow: 0.8s;
  --shadow-header: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.25);
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text-primary);
  background-color: var(--c-primary-blue);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  word-break: break-word;
}

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

a {
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
}

ul, ol {
  padding-inline-start: 1.2em;
}

button {
  font: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--c-accent-green);
  outline-offset: 3px;
}

#main-content {
  scroll-margin-top: 96px;
}

/* ---------- 2. Utilities ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding-block: 64px;
}

.section-warm {
  background: var(--c-warm-gray);
  color: var(--c-primary-blue);
}

.section-warm .section-heading,
.section-warm .section-eyebrow {
  color: var(--c-primary-blue);
}

.section-warm .section-eyebrow {
  color: #D4552A;
}

.section-warm .section-lead {
  color: #3A4A5F;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--c-accent-orange);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-eyebrow::before {
  content: '//';
  opacity: 0.55;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.08;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--c-text-primary);
  margin-bottom: 20px;
}

.section-lead {
  font-size: 17px;
  line-height: 1.7;
  color: var(--c-text-secondary);
  max-width: 640px;
  margin-bottom: 0;
}

.display-title {
  font-family: var(--font-display);
  font-size: clamp(44px, 8vw, 76px);
  line-height: 1.04;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ---------- 3. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  padding: 13px 26px;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  text-align: center;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), background-color var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out), color var(--dur-med) var(--ease-out);
}

.btn-primary {
  background: var(--c-accent-orange);
  color: var(--c-primary-blue);
  font-weight: 700;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #FF8257;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--c-accent-orange);
  color: var(--c-accent-orange);
  transform: translateY(-2px);
}

/* ---------- 4. Cards, Tags, Stats ---------- */
.card {
  background: var(--c-secondary-blue);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
}

.card:hover {
  border-color: rgba(255, 107, 53, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 53, 0.12);
  color: var(--c-accent-orange);
  border: 1px solid rgba(255, 107, 53, 0.3);
}

.chip-green {
  background: rgba(57, 255, 20, 0.08);
  color: var(--c-accent-green);
  border-color: rgba(57, 255, 20, 0.3);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.stat-card {
  position: relative;
  background: var(--c-secondary-blue);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--c-accent-orange);
  border-radius: 0 4px 4px 0;
}

.stat-value {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1;
  color: var(--c-text-primary);
  letter-spacing: 1px;
}

.stat-value em {
  font-style: normal;
  color: var(--c-accent-green);
}

.stat-label {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: 1.5px;
  color: var(--c-text-secondary);
  text-transform: uppercase;
}

/* ---------- 5. Image Frame ---------- */
.image-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--c-secondary-blue) 0%, var(--c-primary-blue) 100%);
  border: 1px solid var(--c-border);
}

.image-frame::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background: linear-gradient(135deg, transparent 55%, rgba(255, 107, 53, 0.12) 100%);
  pointer-events: none;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 6. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 16px 0;
  font-size: 14px;
  color: var(--c-text-secondary);
  list-style: none;
}

.breadcrumb a {
  color: var(--c-text-secondary);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

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

.breadcrumb-sep {
  color: var(--c-border);
  margin: 0 2px;
}

.breadcrumb-current {
  color: var(--c-text-primary);
  font-weight: 600;
}

/* ---------- 7. Search Status ---------- */
.search-status {
  display: none;
  margin-top: 16px;
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 1px;
  color: var(--c-text-secondary);
}

.search-status.is-visible {
  display: block;
}

.is-search-hidden {
  display: none !important;
}

/* ---------- 8. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 24px;
  z-index: 1000;
  padding: 12px 24px;
  background: var(--c-accent-orange);
  color: var(--c-primary-blue);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.4);
  transition: top 0.25s var(--ease-out);
}

.skip-link:focus {
  top: 16px;
}

/* ---------- 9. Scroll Progress ---------- */
.scroll-progress {
  position: absolute;
  bottom: -1px;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--c-accent-orange) 0%, var(--c-accent-green) 100%);
  border-radius: 0 3px 3px 0;
  z-index: 3;
  pointer-events: none;
}

/* ---------- 10. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 25, 47, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
  transition: box-shadow 0.4s var(--ease-out);
}

.site-header[data-scrolled] {
  box-shadow: var(--shadow-header);
}

.header-inner {
  position: relative;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 24px;
}

/* --- 上层品牌说明条 --- */
.header-topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  height: var(--header-h-top);
  border-bottom: 1px solid rgba(30, 58, 95, 0.5);
  overflow: hidden;
  transition: height 0.4s var(--ease-out), opacity 0.3s var(--ease-out), border-color 0.4s var(--ease-out);
}

.header-since {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--c-text-secondary);
  white-space: nowrap;
  text-transform: uppercase;
}

.header-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-text-primary);
}

.brand-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 34px;
  padding: 0 14px;
  background: var(--c-accent-orange);
  color: var(--c-primary-blue);
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 1px;
  border-radius: 4px;
  transform: skewX(-10deg);
}

.brand-badge::before {
  content: '';
  position: absolute;
  right: -3px;
  top: 50%;
  width: 7px;
  height: 7px;
  background: var(--c-accent-green);
  border-radius: 2px;
  transform: translateY(-50%);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 2px;
  white-space: nowrap;
}

.header-tagline {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--c-text-accent);
  white-space: nowrap;
  text-transform: uppercase;
  font-weight: 500;
}

/* --- 下层导航条 --- */
.header-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-h-nav);
}

.site-nav .nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--c-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-pill);
  transition: color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}

.nav-link:hover {
  color: var(--c-text-primary);
  background: rgba(255, 107, 53, 0.1);
}

.nav-link[aria-current="page"] {
  color: var(--c-text-primary);
  background: rgba(255, 107, 53, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255, 107, 53, 0.35);
}

.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 3px;
  border-radius: 2px;
  background: var(--c-accent-orange);
}

/* --- 搜索框 --- */
.header-search {
  position: relative;
  flex-shrink: 0;
}

.header-search::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 50%;
  width: 14px;
  height: 14px;
  margin-top: -8px;
  border: 2px solid var(--c-text-secondary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  transition: border-color var(--dur-fast) var(--ease-out);
}

.header-search::after {
  content: '';
  position: absolute;
  left: 25px;
  top: 50%;
  width: 7px;
  height: 2px;
  margin-top: 5px;
  background: var(--c-text-secondary);
  border-radius: 2px;
  transform: rotate(45deg);
  pointer-events: none;
  z-index: 1;
  transition: background-color var(--dur-fast) var(--ease-out);
}

.header-search:focus-within::before {
  border-color: var(--c-accent-orange);
}

.header-search:focus-within::after {
  background: var(--c-accent-orange);
}

.search-input {
  width: 220px;
  height: 40px;
  padding: 8px 16px 8px 42px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--c-text-primary);
  background: var(--c-secondary-blue);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  transition: width 0.4s var(--ease-out), border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}

.search-input::placeholder {
  color: rgba(176, 184, 196, 0.65);
}

.search-input:focus {
  outline: none;
  width: 260px;
  border-color: var(--c-accent-orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.18);
  background: var(--c-primary-blue);
}

/* --- 移动端菜单按钮 --- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  cursor: pointer;
  color: var(--c-text-primary);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--c-accent-orange);
  background: rgba(255, 107, 53, 0.08);
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 20px;
  height: 15px;
}

.nav-toggle-line {
  display: block;
  height: 2px;
  background: var(--c-text-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.2s var(--ease-out);
}

.nav-toggle-label {
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 12px;
}

.site-header[data-open] .nav-toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* --- 桌面滚动收合 --- */
@media (min-width: 901px) {
  .site-header[data-scrolled] .header-topbar {
    height: 0;
    opacity: 0;
    border-color: transparent;
  }
}

/* ---------- 11. Footer ---------- */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, #0C1B35 0%, #08111F 100%);
  color: var(--c-text-secondary);
  font-size: 15px;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent-orange) 0%, var(--c-accent-green) 100%);
}

.footer-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 72px 24px 56px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-text-primary);
  margin-bottom: 16px;
}

.site-footer .brand-badge {
  min-width: 46px;
  height: 28px;
  font-size: 16px;
}

.site-footer .brand-name {
  font-size: 20px;
}

.footer-brand-summary {
  color: var(--c-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 360px;
}

.footer-trust {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(176, 184, 196, 0.8);
  border-left: 3px solid var(--c-accent-orange);
  padding-left: 14px;
  max-width: 360px;
}

.footer-heading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--c-text-primary);
  margin-bottom: 18px;
}

.footer-heading::before {
  content: '';
  width: 16px;
  height: 2px;
  background: var(--c-accent-orange);
}

.footer-link-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link-list a {
  color: var(--c-text-secondary);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out), padding-left var(--dur-fast) var(--ease-out);
}

.footer-link-list a:hover,
.footer-link-list a:focus-visible {
  color: var(--c-accent-orange);
  padding-left: 4px;
}

.footer-contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-contact-item {
  color: var(--c-text-secondary);
  line-height: 1.6;
}

.footer-contact-note {
  margin-top: 12px;
  padding-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(176, 184, 196, 0.75);
  border-top: 1px dashed var(--c-border);
}

.footer-bottom {
  border-top: 1px solid var(--c-border);
}

.footer-bottom-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 20px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-legal a {
  color: var(--c-text-secondary);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

.footer-legal a:hover,
.footer-legal a:focus-visible {
  color: var(--c-accent-orange);
}

.footer-copy {
  color: var(--c-text-secondary);
}

.footer-icp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
  color: rgba(176, 184, 196, 0.7);
}

/* ---------- 12. Reveal 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

/* ---------- 13. Responsive ---------- */
@media (min-width: 768px) {
  .section {
    padding-block: 96px;
  }
}

@media (max-width: 900px) {
  .header-topbar {
    grid-template-columns: 1fr auto;
    height: 60px;
  }

  .header-since,
  .header-tagline {
    display: none;
  }

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

  .header-navbar {
    display: none;
    min-height: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 16px;
    padding: 16px 0 24px;
  }

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

  .site-header[data-open] .header-topbar {
    border-bottom: 1px solid var(--c-border);
  }

  .nav-list {
    flex-direction: column;
    gap: 2px;
  }

  .nav-link {
    display: block;
    padding: 12px 14px;
    font-size: 16px;
    border-radius: var(--radius-md);
  }

  .nav-link[aria-current="page"]::after {
    left: 14px;
    right: auto;
    width: 28px;
  }

  .header-search {
    width: 100%;
  }

  .search-input,
  .search-input:focus {
    width: 100%;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 24px 32px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

@media (max-width: 400px) {
  .nav-toggle-label {
    display: none;
  }

  .site-header .brand-name {
    font-size: 18px;
  }

  .brand-badge {
    min-width: 46px;
    height: 30px;
    font-size: 17px;
    padding: 0 10px;
  }
}

/* ---------- 14. 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[data-scrolled] .header-topbar {
    height: 0;
    opacity: 1;
  }
}