/* ==========================================================================
   南宫28赛场 · 共享样式 /assets/site.css
   视觉体系：夜场指挥台 / 框架式导航轨 / 海报式分层 / 精密细线网格
   ========================================================================== */

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

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

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

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

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

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

a { color: inherit; }

hr { border: 0; }

/* 2. 设计令牌 -------------------------------------------------------------- */
:root {
  --ink: #070C0A;
  --ink-soft: #0A1210;
  --green-deep: #0E241C;
  --green-mid: #174B36;
  --carbon: #141716;
  --lime: #C8FF4D;
  --lime-soft: #E6FFA8;
  --ember: #FF6A45;
  --wine: #5A1F32;
  --indigo: #211A4D;
  --paper: #F0F4EA;
  --mist: #8FA89D;

  --accent: var(--lime);
  --accent-soft: var(--lime-soft);

  --line-color: rgba(143, 168, 157, 0.22);
  --line: 1px solid var(--line-color);
  --hair: 1px solid rgba(143, 168, 157, 0.12);

  --rail-w: 264px;
  --wrap: 1280px;
  --gutter: 20px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-wide: system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, "Courier New", monospace;
}

html[data-version="legacy"] {
  --accent: #FF6A45;
  --accent-soft: #FFB9A4;
}

@media (min-width: 768px) {
  :root { --gutter: 28px; }
}

@media (min-width: 1024px) {
  :root { --gutter: 48px; }
}

/* 3. 基础排版 -------------------------------------------------------------- */
body {
  min-height: 100vh;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-wide);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(38px, 7vw, 72px); }
h2 { font-size: clamp(26px, 4vw, 44px); letter-spacing: 0.03em; }
h3 { font-size: clamp(19px, 2.4vw, 26px); line-height: 1.32; }
h4 { font-size: 17px; line-height: 1.45; letter-spacing: 0.04em; }

p { max-width: 72ch; }

strong { font-weight: 700; color: var(--paper); }

::selection { background: var(--accent); color: var(--ink); }

:where([id]) { scroll-margin-top: 24px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* 4. 通用排版工具 ---------------------------------------------------------- */
.display {
  font-family: var(--font-wide);
  font-size: clamp(46px, 9vw, 104px);
  font-weight: 900;
  line-height: 0.94;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.display--outline {
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(240, 244, 234, 0.42);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
  flex: 0 0 auto;
}

.lede {
  max-width: 62ch;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.8;
  color: rgba(240, 244, 234, 0.82);
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.text-mist { color: var(--mist); }
.text-accent { color: var(--accent); }
.text-ember { color: var(--ember); }

/* 5. 布局骨架 -------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(44px, 6vw, 88px); }

.grid { display: grid; gap: clamp(16px, 2vw, 28px); }

.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }

@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.rule {
  height: 1px;
  width: 100%;
  background: var(--line-color);
}

.grid-lines {
  background-image:
    linear-gradient(to right, rgba(143, 168, 157, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(143, 168, 157, 0.08) 1px, transparent 1px);
  background-size: 64px 64px;
}

/* 6. 容器组件 -------------------------------------------------------------- */
.panel {
  background: var(--carbon);
  border: var(--line);
  padding: clamp(18px, 2.4vw, 28px);
}

.panel--green { background: var(--green-deep); }
.panel--wine { background: var(--wine); }
.panel--indigo { background: var(--indigo); }

.card {
  position: relative;
  display: block;
  background: var(--green-deep);
  border: var(--line);
  padding: clamp(18px, 2.2vw, 26px);
  text-decoration: none;
  color: var(--paper);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.card:hover { border-color: rgba(200, 255, 77, 0.45); }

/* 7. 标签 ---------------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
}

.tag--accent {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
  font-weight: 700;
}

.tag--warn {
  border-color: rgba(255, 106, 69, 0.5);
  color: var(--ember);
}

/* 8. 按钮与链接 ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease,
    border-color 0.16s ease;
}

.btn--primary {
  background: var(--accent);
  color: var(--ink);
}

.btn--primary:hover { background: var(--accent-soft); }

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

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

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--accent);
  transition: border-color 0.16s ease;
}

.link-arrow::after {
  content: "→";
  transition: transform 0.16s ease;
}

.link-arrow:hover { border-bottom-color: currentColor; }
.link-arrow:hover::after { transform: translateX(4px); }

/* 9. 面包屑 ---------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.breadcrumb li { display: flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: rgba(143, 168, 157, 0.5);
}

.breadcrumb a { text-decoration: none; color: var(--mist); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb li[aria-current="page"] { color: var(--paper); }

/* 10. 图片容器基础规则 ----------------------------------------------------- */
.media { margin: 0; }

.media__frame {
  position: relative;
  overflow: hidden;
  background: var(--green-mid);
  border: var(--line);
}

.media__frame > img,
.media__frame > picture,
.media__frame > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.media--21x9 .media__frame { aspect-ratio: 21 / 9; }
.media--16x9 .media__frame { aspect-ratio: 16 / 9; }
.media--4x3 .media__frame { aspect-ratio: 4 / 3; }
.media--1x1 .media__frame { aspect-ratio: 1 / 1; }
.media--3x4 .media__frame { aspect-ratio: 3 / 4; }

.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--mist);
}

/* 11. 跳至主内容 ------------------------------------------------------------ */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.16s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: 3px;
}

/* 12. 头部 / 框架式导航轨 --------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--ink);
  border-bottom: var(--line);
}

.rail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px var(--gutter);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--paper);
}

.brand__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--accent);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, 100% 72%, calc(100% - 10px) 100%, 0 100%);
  transition: background-color 0.18s ease;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.06em;
  max-width: none;
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
  max-width: none;
}

@media (max-width: 380px) {
  .brand__tagline { display: none; }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 12px;
  background: transparent;
  border: var(--line);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.16s ease, color 0.16s ease;
}

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

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.site-header[data-open] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

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

.site-header[data-open] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

.nav-toggle__text { line-height: 1; }

.site-nav {
  display: none;
  padding: 16px var(--gutter) 22px;
  border-top: var(--line);
  background: var(--ink);
}

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

.site-nav__list {
  display: grid;
  gap: 2px;
  margin-bottom: 18px;
}

.site-nav__list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 2px;
  border-bottom: 1px solid rgba(143, 168, 157, 0.12);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--paper);
  transition: color 0.16s ease, padding-left 0.16s ease;
}

.site-nav__index {
  flex: 0 0 auto;
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--mist);
  transition: color 0.16s ease;
}

.site-nav__label { flex: 1 1 auto; }

.site-nav__list a:hover {
  color: var(--accent);
  padding-left: 6px;
}

.site-nav__list a:hover .site-nav__index { color: var(--accent); }

.site-nav__list a[aria-current="page"] { color: var(--accent); }

.site-nav__list a[aria-current="page"] .site-nav__index {
  color: var(--accent);
}

.site-nav__list a[aria-current="page"]::after {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  margin-left: auto;
  background: var(--accent);
}

.rail-tools {
  display: grid;
  gap: 12px;
}

.rail-cta {
  width: 100%;
  justify-content: center;
}

.version-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 11px 12px;
  background: transparent;
  border: var(--line);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.16s ease, color 0.16s ease;
}

.version-toggle:hover {
  border-color: var(--mist);
  color: var(--paper);
}

.version-toggle__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  background: var(--accent);
  transition: background-color 0.18s ease;
}

.version-toggle__text { color: var(--paper); line-height: 1.5; }

.version-toggle[aria-pressed="true"] .version-toggle__text { color: var(--accent); }

.rail-progress { display: none; }

@media (min-width: 640px) and (max-width: 1023px) {
  .site-nav__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 22px;
  }
  .rail-tools { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    border-bottom: 0;
    border-right: var(--line);
    background: linear-gradient(180deg, #0A1613 0%, #070C0A 58%);
  }

  .rail-head {
    padding: 26px 22px 20px;
    border-bottom: var(--line);
  }

  .nav-toggle { display: none; }

  .site-nav {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    padding: 18px 22px 0;
    border-top: 0;
    overflow-y: auto;
    background: transparent;
    scrollbar-width: thin;
    scrollbar-color: rgba(143, 168, 157, 0.35) transparent;
  }

  .site-nav__list {
    grid-template-columns: 1fr;
    gap: 0;
    margin-bottom: 20px;
  }

  .site-nav__list a {
    padding: 11px 0;
    font-size: 14.5px;
    letter-spacing: 0.08em;
  }

  .site-nav__list a:hover { padding-left: 4px; }

  .rail-tools {
    margin-top: auto;
    padding-bottom: 18px;
    grid-template-columns: 1fr;
  }

  .rail-progress {
    display: block;
    padding: 0 22px 24px;
  }

  .rail-progress__value {
    margin-bottom: 8px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.22em;
    color: var(--mist);
    max-width: none;
  }

  .rail-progress__track {
    position: relative;
    height: 2px;
    background: rgba(143, 168, 157, 0.2);
    overflow: hidden;
  }

  .rail-progress__bar {
    display: block;
    width: 0;
    height: 100%;
    background: var(--accent);
    transition: width 0.1s linear, background-color 0.18s ease;
  }
}

/* 13. 页脚 ----------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: 0;
  padding: clamp(40px, 6vw, 72px) var(--gutter) 26px;
  background: var(--green-deep);
  border-top: var(--line);
  color: var(--paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), rgba(200, 255, 77, 0) 62%);
  transition: background 0.18s ease;
}

.footer-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  grid-template-columns: 1fr;
  max-width: var(--wrap);
  margin-inline: auto;
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.5fr 0.7fr 0.7fr 1.1fr;
  }
}

.footer-brand__mark {
  display: inline-block;
  margin-bottom: 16px;
  padding: 4px 9px;
  border: var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  max-width: none;
}

.footer-brand__name {
  margin-bottom: 6px;
  font-family: var(--font-wide);
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: 0.04em;
  max-width: none;
}

.footer-brand__tagline {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
  max-width: none;
}

.footer-brand__intro {
  max-width: 34ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(240, 244, 234, 0.7);
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  max-width: none;
}

.footer-col__list { display: grid; gap: 2px; }

.footer-col__list a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid rgba(143, 168, 157, 0.14);
  font-size: 14.5px;
  letter-spacing: 0.03em;
  text-decoration: none;
  color: rgba(240, 244, 234, 0.8);
  transition: color 0.16s ease, padding-left 0.16s ease;
}

.footer-col__list a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-contact__list {
  display: grid;
  gap: 12px;
}

.footer-contact__list dt {
  margin-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.footer-contact__list dd {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(240, 244, 234, 0.88);
  overflow-wrap: anywhere;
}

.footer-contact__note {
  margin-top: 14px;
  max-width: 32ch;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  max-width: var(--wrap);
  margin: clamp(28px, 4vw, 44px) auto 0;
  padding-top: 18px;
  border-top: var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.footer-legal p { max-width: none; }

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
}

.footer-legal__links a {
  text-decoration: none;
  color: var(--mist);
  transition: color 0.16s ease;
}

.footer-legal__links a:hover { color: var(--accent); }

/* 14. 显现动效 ------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* 15. 减少动效 ------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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