/* ==========================================================================
   九游赛事 · 共享样式表 /assets/site.css
   版本 V3.1 QG8B ｜ 深夜战术室 × 展览画册编排
   ========================================================================== */

/* --------------------------------------------------------------------------
   01 · Reset
   -------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

a { color: inherit; text-decoration: none; }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

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

table { border-collapse: collapse; width: 100%; }

hr { border: 0; }

/* --------------------------------------------------------------------------
   02 · 设计变量
   -------------------------------------------------------------------------- */
:root {
  --c-ink: #05080A;
  --c-night: #0B1A26;
  --c-moss: #0E2B24;
  --c-paper: #F4F6F3;
  --c-orange: #FF6A1A;
  --c-cyan: #4FE3D0;
  --c-slate: #22323C;
  --c-text: #E9EEEB;
  --c-muted: #93A6AC;
  --c-amber: #E8B04B;
  --c-paper-ink: #12181B;
  --c-text-dim: #C3D0CC;
  --grad-brand: linear-gradient(90deg, #FF6A1A, #4FE3D0);

  --font-display: "Helvetica Neue Condensed", "Arial Narrow", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Roboto Mono", Consolas, "Liberation Mono", "Noto Sans Mono", monospace;

  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-20: 20px;
  --fs-28: 28px;
  --fs-40: 40px;
  --fs-64: 64px;
  --fs-96: 96px;

  --shell-w: 1240px;
  --gutter: 20px;
  --gap-section: 72px;
  --hdr-pad: 18px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-in: 320ms;
  --dur-tap: 180ms;
  --radius: 2px;
}

@media (min-width: 768px) {
  :root { --gutter: 32px; --gap-section: 96px; }
}

@media (min-width: 1200px) {
  :root { --gutter: 40px; --gap-section: 120px; }
}

/* --------------------------------------------------------------------------
   03 · 基础排版
   -------------------------------------------------------------------------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--c-text);
  background-color: var(--c-ink);
  background-image:
    radial-gradient(120% 78% at 6% -14%, rgba(79, 227, 208, 0.075) 0%, rgba(5, 8, 10, 0) 56%),
    radial-gradient(88% 58% at 96% -4%, rgba(255, 106, 26, 0.055) 0%, rgba(5, 8, 10, 0) 52%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: #FFFFFF;
}

p { text-wrap: pretty; }

::selection { background: rgba(255, 106, 26, 0.32); color: #FFFFFF; }

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

/* --------------------------------------------------------------------------
   04 · 布局与工具类
   -------------------------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-head { padding-top: clamp(28px, 5vw, 56px); }

.rule { height: 1px; background: var(--c-slate); }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.muted { color: var(--c-muted); }

.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
}

.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;
}

/* --------------------------------------------------------------------------
   05 · 跳跃链接与按钮
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -70px;
  z-index: 90;
  padding: 11px 20px;
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-ink);
  background: var(--c-cyan);
  border-radius: var(--radius);
  transition: top var(--dur-tap) var(--ease);
}

.skip-link:focus { top: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 11px 22px;
  font-family: var(--font-body);
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    background var(--dur-tap) var(--ease),
    color var(--dur-tap) var(--ease),
    border-color var(--dur-tap) var(--ease),
    transform var(--dur-tap) var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn--solid { background: var(--c-orange); color: #06090B; }
.btn--solid:hover { background: #FF823F; }

.btn--outline { border-color: var(--c-slate); color: var(--c-text); }
.btn--outline:hover { border-color: var(--c-cyan); color: var(--c-cyan); }

.btn--cyan { border-color: rgba(79, 227, 208, 0.55); color: var(--c-cyan); }
.btn--cyan:hover { background: rgba(79, 227, 208, 0.12); }

/* --------------------------------------------------------------------------
   06 · 站点头部
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(5, 8, 10, 0.94);
  border-bottom: 1px solid var(--c-slate);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: box-shadow var(--dur-in) var(--ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--grad-brand);
  opacity: 0.92;
}

.site-header[data-scrolled] { box-shadow: 0 22px 44px -30px rgba(0, 0, 0, 0.95); }

.header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: var(--hdr-pad);
  transition: padding-block var(--dur-in) var(--ease);
}

.site-header[data-scrolled] { --hdr-pad: 11px; }

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-link {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 13px;
  min-width: 0;
}

.brand-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  bottom: 3px;
  width: 2px;
  border-radius: 1px;
  background: linear-gradient(180deg, var(--c-orange), var(--c-cyan));
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.25;
  color: #FFFFFF;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  line-height: 1.4;
  color: var(--c-muted);
  white-space: nowrap;
}

.version-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--c-muted);
  border: 1px solid var(--c-slate);
  border-radius: var(--radius);
  padding: 3px 7px;
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-text);
  border: 1px solid var(--c-slate);
  border-radius: var(--radius);
  transition:
    border-color var(--dur-tap) var(--ease),
    color var(--dur-tap) var(--ease);
}

.nav-toggle:hover { border-color: var(--c-cyan); color: var(--c-cyan); }

.nav-toggle-bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle-bars i {
  display: block;
  height: 1.5px;
  border-radius: 1px;
  background: currentColor;
  transition:
    transform var(--dur-tap) var(--ease),
    opacity var(--dur-tap) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

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

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 10px 12px;
  font-size: var(--fs-14);
  color: var(--c-text-dim);
  white-space: nowrap;
  transition: color var(--dur-tap) var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease);
}

.nav-list a:hover { color: #FFFFFF; }
.nav-list a:hover::after { transform: scaleX(1); }
.nav-list a[aria-current="page"] { color: #FFFFFF; }
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

.nav-utility {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-subscribe {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-orange);
  border: 1px solid rgba(255, 106, 26, 0.6);
  border-radius: var(--radius);
  white-space: nowrap;
  transition:
    background var(--dur-tap) var(--ease),
    color var(--dur-tap) var(--ease),
    border-color var(--dur-tap) var(--ease);
}

.nav-subscribe:hover {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-ink);
}

.nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: var(--c-muted);
  border: 1px solid var(--c-slate);
  border-radius: var(--radius);
  transition:
    color var(--dur-tap) var(--ease),
    border-color var(--dur-tap) var(--ease),
    background var(--dur-tap) var(--ease);
}

.nav-icon:hover {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
  background: rgba(79, 227, 208, 0.08);
}

@keyframes nav-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: none; }
}

/* 窄屏：折叠面板 + 横向滑动栏目条 */
@media (max-width: 919px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 14px;
    background: var(--c-night);
    border-top: 1px solid var(--c-slate);
    border-bottom: 1px solid var(--c-slate);
    box-shadow: 0 34px 64px -34px rgba(0, 0, 0, 0.95);
  }

  .site-nav[data-open] {
    display: flex;
    animation: nav-in 240ms var(--ease);
  }

  .nav-list {
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 0;
    padding: 0 var(--gutter) 12px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }

  .nav-list li {
    flex: 0 0 auto;
    scroll-snap-align: start;
  }

  .nav-list a {
    padding: 12px 14px;
    font-size: 15px;
  }

  .nav-list a::after { left: 14px; right: 14px; bottom: 7px; }

  .nav-utility { padding: 0 var(--gutter); }
}

@media (max-width: 600px) {
  .version-tag { display: none; }
  .brand-mark { font-size: 15px; }
  .brand-sub { font-size: 9px; letter-spacing: 0.12em; }
  .nav-subscribe { flex: 1 1 auto; justify-content: center; }
}

/* --------------------------------------------------------------------------
   07 · 站点页脚
   -------------------------------------------------------------------------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: var(--gap-section);
  color: var(--c-text);
  background: var(--c-moss);
  border-top: 1px solid var(--c-slate);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--grad-brand);
  opacity: 0.7;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-block: 54px 40px;
}

@media (min-width: 900px) {
  .footer-top {
    grid-template-columns: minmax(240px, 1fr) 2fr;
    gap: 64px;
    padding-block: 72px 48px;
  }
}

.footer-mark {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #FFFFFF;
}

.footer-kicker {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
}

.footer-note {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(233, 238, 235, 0.74);
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 30px;
}

.footer-group-title {
  position: relative;
  margin-bottom: 14px;
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--c-muted);
}

.footer-group-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 22px;
  height: 1px;
  background: var(--grad-brand);
}

.footer-links li + li { margin-top: 9px; }

.footer-links a {
  font-size: 14px;
  color: var(--c-text-dim);
  transition: color var(--dur-tap) var(--ease);
}

.footer-links a:hover { color: #FFFFFF; }

.footer-mid {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
  padding-block: 28px 34px;
  border-top: 1px solid rgba(34, 50, 60, 0.85);
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 22px 46px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.contact-item--wide { min-width: min(100%, 260px); }

.contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--c-muted);
}

.contact-value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
}

.copy-btn {
  align-self: flex-start;
  margin-top: 2px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
  border: 1px solid rgba(79, 227, 208, 0.35);
  border-radius: var(--radius);
  transition:
    background var(--dur-tap) var(--ease),
    color var(--dur-tap) var(--ease),
    border-color var(--dur-tap) var(--ease);
}

.copy-btn:hover { background: rgba(79, 227, 208, 0.14); }

.copy-btn[data-copied="true"] {
  color: var(--c-amber);
  border-color: rgba(232, 176, 75, 0.55);
}

.footer-cta { display: flex; align-items: center; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px 26px;
  border-top: 1px solid rgba(34, 50, 60, 0.85);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   08 · 章节头 · 面包屑 · 正文
   -------------------------------------------------------------------------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.section-index {
  position: relative;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--c-orange);
}

.section-index::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  min-width: 30px;
  height: 1px;
  background: var(--grad-brand);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #FFFFFF;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

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

.breadcrumbs li + li::before {
  content: "/";
  color: var(--c-slate);
}

.breadcrumbs a { color: var(--c-muted); transition: color var(--dur-tap) var(--ease); }
.breadcrumbs a:hover { color: var(--c-cyan); }
.breadcrumbs [aria-current="page"] { color: var(--c-text); }

.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--c-text);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2 {
  margin-top: 1.9em;
  padding-top: 0.6em;
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: 0.02em;
  color: #FFFFFF;
  border-top: 1px solid var(--c-slate);
}

.prose h3 {
  margin-top: 1.6em;
  font-size: 19px;
  color: #FFFFFF;
}

.prose strong { color: #FFFFFF; }

.prose a {
  color: var(--c-cyan);
  border-bottom: 1px solid rgba(79, 227, 208, 0.4);
  transition: border-color var(--dur-tap) var(--ease);
}

.prose a:hover { border-bottom-color: var(--c-cyan); }

.prose ul { padding-left: 0; }

.prose ul li {
  position: relative;
  padding-left: 1.05em;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-orange);
}

.prose ol {
  padding-left: 1.2em;
  list-style: decimal;
}

.prose li + li { margin-top: 0.45em; }

.prose blockquote {
  padding-left: 18px;
  font-size: 16px;
  color: var(--c-muted);
  border-left: 2px solid var(--c-cyan);
}

.prose table {
  font-family: var(--font-mono);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.prose th,
.prose td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--c-slate);
}

.prose th { color: var(--c-muted); font-weight: 500; letter-spacing: 0.06em; }

/* --------------------------------------------------------------------------
   09 · 面板 · 标签 · 图片容器
   -------------------------------------------------------------------------- */
.panel {
  padding: 26px;
  background: var(--c-night);
  border: 1px solid var(--c-slate);
  border-radius: var(--radius);
}

.panel--moss { background: var(--c-moss); }

.panel--night { background: var(--c-night); }

.panel--paper {
  background: var(--c-paper);
  color: var(--c-paper-ink);
  border-color: rgba(18, 24, 27, 0.14);
}

.panel--paper h2,
.panel--paper h3 { color: var(--c-paper-ink); }

.panel--paper .muted { color: rgba(18, 24, 27, 0.6); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  border: 1px solid currentColor;
  border-radius: 1px;
}

.tag--alert { color: var(--c-amber); }
.tag--live { color: var(--c-cyan); }
.tag--key { color: var(--c-orange); }

.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--c-night);
  border: 1px solid var(--c-slate);
  border-radius: var(--radius);
}

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

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.26;
  background-image:
    radial-gradient(rgba(244, 246, 243, 0.22) 0.5px, transparent 0.5px),
    radial-gradient(rgba(244, 246, 243, 0.16) 0.5px, transparent 0.5px);
  background-size: 3px 3px, 5px 5px;
  background-position: 0 0, 2px 3px;
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 8, 10, 0.05) 0%, rgba(5, 8, 10, 0.72) 100%);
}

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   10 · 滚动显现协议
   -------------------------------------------------------------------------- */
[data-reveal] {
  transition:
    opacity 420ms var(--ease),
    transform 420ms var(--ease);
}

html.js-on [data-reveal]:not(.is-visible) {
  opacity: 0;
  transform: translateY(12px);
}

/* --------------------------------------------------------------------------
   11 · 减少动态
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  html { scroll-behavior: auto; }

  html.js-on [data-reveal]:not(.is-visible) {
    opacity: 1 !important;
    transform: none !important;
  }
}