/* ============================================================
   天博赛事 · 共享基础样式 /assets/site.css
   深墨蓝数据场 / 荧光青信号 / 信号橙操作 / 红土赭地域引线
   ============================================================ */

*, *::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, ul, ol {
  margin: 0;
}

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

img, svg, video { max-width: 100%; }

:root {
  --ink: #06131F;
  --ink-2: #0B1F31;
  --steel: #173B52;
  --line: #28485E;
  --haze: #D8E5E6;
  --paper: #F4F8F6;
  --cyan: #22E0CF;
  --orange: #FF6A3D;
  --ochre: #B96B4B;
  --pulse: #F7C948;

  --shell: 1280px;
  --gutter: 64px;
  --header-h: 76px;

  --font-display: "Barlow Condensed", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", ui-monospace, Consolas, "Liberation Mono", monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --radius: 2px;
}

body {
  background: var(--ink);
  color: var(--haze);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open { overflow: hidden; }

main { display: block; }
#main-content { display: block; }

/* ---------- 排版 ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--paper);
}

h1 { font-size: clamp(44px, 7vw, 96px); }
h2 { font-size: clamp(30px, 4.2vw, 54px); }
h3 { font-size: clamp(21px, 2.4vw, 30px); }
h4 { font-size: clamp(17px, 1.6vw, 20px); }

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

strong { color: var(--paper); font-weight: 600; }

/* ---------- 可访问性 ---------- */

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 320;
  transform: translateY(-180%);
  background: var(--cyan);
  color: #04211F;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  padding: 10px 18px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform .2s var(--ease);
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 容器与网格 ---------- */

.shell,
.container {
  width: min(var(--shell), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.main-offset {
  padding-top: calc(var(--header-h) + clamp(28px, 5vw, 72px));
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

/* ---------- 通用组件 ---------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--ochre);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(216, 229, 230, .48);
}

.hairline {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 0;
}

.prose {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(216, 229, 230, .9);
}

.prose p + p { margin-top: 1.1em; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--haze);
  white-space: nowrap;
}

.tag--beta {
  background: var(--pulse);
  border-color: var(--pulse);
  color: #2A1B00;
}

.tag--live {
  color: var(--cyan);
  border-color: rgba(34, 224, 207, .5);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .06em;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .15s linear, border-color .15s linear, color .15s linear;
}

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #1B0A04;
  font-weight: 600;
}

.btn--primary:hover { background: #FF8A63; border-color: #FF8A63; }

.btn--ghost {
  color: var(--paper);
  border-color: var(--steel);
}

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

.btn--cyan {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04211F;
  font-weight: 600;
}

.btn--cyan:hover { background: #5CEBDE; border-color: #5CEBDE; }

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(216, 229, 230, .6);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumb li::after { content: "/"; color: var(--line); }

.breadcrumb li:last-child::after { content: none; }

.breadcrumb a { color: var(--cyan); text-decoration: none; }

.breadcrumb a:hover { text-decoration: underline; }

/* ---------- 图片容器基础规则 ---------- */

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 0;
}

.media-frame > img,
.media-frame > svg,
.media-frame > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(34, 224, 207, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 224, 207, .07) 1px, transparent 1px);
  background-size: 48px 48px;
  mix-blend-mode: screen;
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--band { aspect-ratio: 21 / 9; }

.clip-slant {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 54px), 0 100%);
}

/* ============================================================
   头部
   ============================================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  background-color: transparent;
  color: var(--paper);
  transition: background-color .28s var(--ease), box-shadow .28s var(--ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 19, 31, .92) 0%, rgba(6, 19, 31, .52) 58%, rgba(6, 19, 31, 0) 100%);
  transition: opacity .28s var(--ease);
}

.site-header[data-scrolled] {
  background-color: var(--ink);
  box-shadow: 0 1px 0 var(--line), 0 18px 36px -30px #000;
}

.site-header[data-scrolled]::before { opacity: 0; }

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 58%, var(--orange) 82%, var(--pulse) 100%);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s linear;
}

.site-header[data-scrolled] .header-progress { opacity: 1; }

.header-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 32px);
  min-height: var(--header-h);
}

/* 品牌 */
.brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  flex: 0 0 auto;
  padding-block: 10px;
  color: var(--paper);
  text-decoration: none;
}

.brand-mark {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .24em;
  line-height: 1;
  color: var(--cyan);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  letter-spacing: .04em;
  line-height: 1;
  color: var(--paper);
}

/* 导航 */
.site-nav { margin-inline-start: auto; }

.nav-track {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 11px 13px;
  border-radius: var(--radius);
  color: var(--haze);
  font-size: 15px;
  line-height: 1;
  letter-spacing: .02em;
  text-decoration: none;
  transition: color .15s linear, background-color .15s linear;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: rgba(216, 229, 230, .42);
  transition: color .15s linear;
}

.nav-label { display: inline-block; }

.nav-link::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 5px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}

.nav-link:hover { color: var(--paper); }
.nav-link:hover .nav-index { color: var(--ochre); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  background: var(--cyan);
  color: #04211F;
}

.nav-link[aria-current="page"] .nav-index { color: rgba(4, 33, 31, .55); }
.nav-link[aria-current="page"]::after { transform: scaleX(0); }
.nav-link[aria-current="page"]:hover { color: #04211F; }

/* 操作坞 */
.header-dock {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.dock-link {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .15s linear, color .15s linear, background-color .15s linear;
}

.dock-link:hover { border-color: var(--cyan); color: var(--cyan); }

.dock-link--accent {
  background: var(--orange);
  border-color: var(--orange);
  color: #1B0A04;
  font-weight: 600;
}

.dock-link--accent:hover {
  background: #FF8A63;
  border-color: #FF8A63;
  color: #1B0A04;
}

/* 移动开关 */
.nav-toggle {
  display: none;
  flex: 0 0 auto;
  margin-inline-start: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 31, 49, .65);
  color: var(--paper);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 19px;
  height: 2px;
  background: currentColor;
  transition: transform .22s var(--ease), opacity .12s linear;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端专属区块默认隐藏 */
.nav-panel-title,
.nav-quick { display: none; }

/* ============================================================
   页脚
   ============================================================ */

.site-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 140px);
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  color: var(--haze);
  overflow: hidden;
}

.footer-contour {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image:
    repeating-radial-gradient(ellipse 140% 100% at 88% -20%, rgba(40, 72, 94, .6) 0px, rgba(40, 72, 94, .6) 1px, transparent 1px, transparent 42px),
    repeating-radial-gradient(ellipse 100% 80% at 6% 128%, rgba(185, 107, 75, .3) 0px, rgba(185, 107, 75, .3) 1px, transparent 1px, transparent 56px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, .18) 72%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, .18) 72%, transparent 100%);
}

.footer-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.35fr);
  gap: clamp(32px, 5vw, 72px);
  padding-block: clamp(56px, 7vw, 96px) clamp(36px, 4vw, 56px);
}

.footer-lead {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 40ch;
}

.brand--footer {
  flex-direction: row;
  align-items: baseline;
  gap: 12px;
  padding-block: 0;
  width: fit-content;
}

.brand--footer .brand-mark { letter-spacing: .2em; }

.footer-intro {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(216, 229, 230, .78);
  max-width: 36ch;
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-col { display: flex; flex-direction: column; }

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 16px;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list a {
  display: inline-block;
  font-size: 15px;
  color: rgba(244, 248, 246, .82);
  text-decoration: none;
  transition: color .15s linear, padding-left .18s var(--ease);
}

.footer-list a:hover {
  color: var(--cyan);
  padding-left: 6px;
}

.footer-meta {
  position: relative;
  z-index: 1;
  padding-block: 26px;
  border-top: 1px solid var(--line);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px 24px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.contact-key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ochre);
}

.contact-value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--paper);
  word-break: break-word;
}

.contact-note {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(216, 229, 230, .58);
}

.footer-base {
  position: relative;
  z-index: 1;
  background: var(--ink);
  border-top: 1px solid var(--line);
}

.footer-base-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(216, 229, 230, .6);
}

.footer-copy { margin: 0; }

.footer-legal {
  margin: 0;
  color: rgba(216, 229, 230, .42);
}

/* ============================================================
   滚动显现协议
   ============================================================ */

html.js [data-reveal="idle"] {
  opacity: 0;
  transform: translateY(18px);
}

[data-reveal="in"] {
  opacity: 1;
  transform: none;
  transition: opacity .42s var(--ease), transform .42s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

/* ============================================================
   响应式
   ============================================================ */

@media (max-width: 1080px) {
  .header-dock { display: none; }

  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(340px, 86vw);
    margin: 0;
    padding: calc(var(--header-h) + 26px) 24px 40px;
    background: var(--ink-2);
    border-inline-start: 1px solid var(--line);
    box-shadow: -28px 0 56px -38px #000;
    transform: translateX(102%);
    transition: transform .3s var(--ease);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .site-nav[data-open] { transform: translateX(0); }

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

  .nav-track li + li { border-top: 1px solid rgba(40, 72, 94, .6); }

  .nav-link {
    justify-content: flex-start;
    padding: 16px 4px;
    border-radius: 0;
    font-size: 16px;
  }

  .nav-link::after { left: 4px; right: 4px; bottom: 9px; }

  .nav-link[aria-current="page"] {
    background: transparent;
    color: var(--cyan);
  }

  .nav-link[aria-current="page"] .nav-index { color: var(--ochre); }

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

  .nav-panel-title {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .26em;
    text-transform: uppercase;
    color: var(--ochre);
    margin-bottom: 14px;
  }

  .nav-quick {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 28px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
  }

  .nav-quick-title {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .2em;
    color: rgba(216, 229, 230, .5);
  }

  .nav-quick-link {
    font-size: 14px;
    color: var(--cyan);
    text-decoration: none;
    padding: 6px 0;
    transition: color .15s linear;
  }

  .nav-quick-link:hover { color: var(--paper); }
}

@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr; }

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

  .grid-12 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (max-width: 720px) {
  :root {
    --gutter: 20px;
    --header-h: 64px;
  }

  body { font-size: 16px; }

  .brand-name { font-size: 19px; }
  .brand-mark { letter-spacing: .18em; }

  .footer-nav { gap: 22px; }

  .footer-base-inner { font-size: 11px; }
}

@media (max-width: 560px) {
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-contact { grid-template-columns: 1fr; }

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

  .grid-12 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .btn { padding: 12px 18px; font-size: 12px; }
}

/* ============================================================
   减弱动效
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .site-nav { transition: none; }

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

  [data-reveal="in"] { transition: none; }

  .skip-link { transition: none; }
}