/* ============================================================
   浩瀚体育赛场 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

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

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

a { color: inherit; }

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

button { font: inherit; color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

/* ---------- 2. 变量 ---------- */
:root {
  --void: #05070D;
  --abyss: #0B2239;
  --steel: #143A5C;
  --cyan: #39F2C8;
  --orange: #FF8A3D;
  --cool: #5BD1E6;
  --violet: #8A5CFF;
  --rock: #8A97A6;
  --bone: #F2F5F7;
  --moss: #6FAF8F;

  --line-1: rgba(138, 151, 166, 0.2);
  --line-2: rgba(138, 151, 166, 0.4);
  --grid-line: rgba(91, 209, 230, 0.075);
  --scan-line: rgba(91, 209, 230, 0.05);

  --font-head: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", "Roboto Mono",
    Menlo, Consolas, "Courier New", monospace;

  --wrap: 1240px;
  --gutter: clamp(16px, 3.4vw, 40px);
  --gap: 8px;

  --fs-h1: clamp(2.25rem, 6.6vw, 6rem);
  --fs-h2: clamp(1.7rem, 3.4vw, 3rem);
  --fs-h3: clamp(1.2rem, 1.9vw, 1.75rem);
  --fs-body: clamp(1rem, 1.05vw, 1.125rem);
  --fs-meta: clamp(0.7rem, 0.85vw, 0.8125rem);

  --cut: 12deg;
  --shadow-hard: 5px 5px 0 rgba(57, 242, 200, 0.22);
  --shadow-hard-warm: 5px 5px 0 rgba(255, 138, 61, 0.28);
  --shadow-soft: 0 24px 48px -28px rgba(0, 0, 0, 0.95);

  --rail-h: 34px;
  --bar-h: 66px;
}

/* ---------- 3. 基础排版与蓝图底纹 ---------- */
body {
  min-height: 100vh;
  margin: 0;
  background-color: var(--void);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-attachment: fixed;
  color: var(--bone);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  letter-spacing: 0.005em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

p { max-width: 68ch; }

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

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

.u-warm { color: var(--orange); }
.u-cool { color: var(--cool); }
.u-cyan { color: var(--cyan); }
.u-rock { color: var(--rock); }

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

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

/* ---------- 4. 容器与章节 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 104px);
}

.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

.section-head h2 {
  font-size: var(--fs-h2);
  letter-spacing: -0.03em;
}

.section-head p {
  color: var(--rock);
  font-size: 1rem;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.kicker::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--cyan);
}

.eyebrow-line {
  height: 1px;
  border: 0;
  background: var(--line-1);
  margin-block: clamp(16px, 2.4vw, 28px);
}

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: fixed;
  left: 12px;
  top: -80px;
  z-index: 300;
  padding: 11px 18px;
  background: var(--cyan);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  border: 2px solid var(--void);
  transition: top 0.18s ease;
}

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

/* ---------- 6. 阅读进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 250;
  background: rgba(5, 7, 13, 0.6);
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cool) 55%, var(--orange) 100%);
  transition: width 0.12s linear;
}

/* ---------- 7. 头部：坐标轨 ---------- */
.site-header {
  position: relative;
  z-index: 90;
}

.header-rail {
  background: var(--void);
  border-bottom: 1px solid var(--line-1);
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.08em;
}

.rail-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--rail-h);
  color: var(--rock);
}

.coord-tag {
  color: var(--cyan);
  white-space: nowrap;
}

.rail-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--rock);
  white-space: nowrap;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 0 0 rgba(111, 175, 143, 0.6);
  animation: pulse-dot 2.6s ease-out infinite;
}

@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0 rgba(111, 175, 143, 0.55); }
  70%  { box-shadow: 0 0 0 7px rgba(111, 175, 143, 0); }
  100% { box-shadow: 0 0 0 0 rgba(111, 175, 143, 0); }
}

.rail-entry {
  margin-left: auto;
  padding: 4px 12px;
  color: var(--orange);
  text-decoration: none;
  border: 1px solid rgba(255, 138, 61, 0.4);
  white-space: nowrap;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.rail-entry:hover,
.rail-entry:focus-visible {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--void);
}

/* ---------- 8. 头部：命令栏 ---------- */
.header-bar {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(11, 34, 57, 0.97), rgba(11, 34, 57, 0.9));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-2);
}

.header-bar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    rgba(57, 242, 200, 0.45) 0 18px,
    transparent 18px 42px
  );
  pointer-events: none;
}

.bar-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: var(--bar-h);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--bone);
  flex: 0 0 auto;
}

.brand-mark {
  position: relative;
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  border: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.4s ease;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--orange);
}

.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  transform: rotate(135deg);
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.06rem;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--bone);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.24em;
  color: var(--rock);
  line-height: 1;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 13px;
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

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

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 11px;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transition: transform 0.22s ease, height 0.22s ease;
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(57, 242, 200, 0.08);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  height: 2px;
  border-bottom-color: transparent;
  transform: translateY(5px) rotate(45deg);
}

/* 主导航 */
.primary-nav {
  margin-left: auto;
  min-width: 0;
}

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

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 11px;
  color: var(--bone);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.nav-idx {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--rock);
  transition: color 0.18s ease;
}

.nav-link:hover {
  color: var(--cyan);
  background: rgba(57, 242, 200, 0.07);
  border-color: var(--line-1);
}

.nav-link:hover .nav-idx { color: var(--cyan); }

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

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

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 4px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 9. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  background: var(--cyan);
  border: 1px solid var(--cyan);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-hard);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(57, 242, 200, 0.28);
}

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(57, 242, 200, 0.1);
  box-shadow: 8px 8px 0 rgba(57, 242, 200, 0.18);
}

.btn--warm {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--void);
  box-shadow: var(--shadow-hard-warm);
}

.btn--warm:hover,
.btn--warm:focus-visible {
  box-shadow: 8px 8px 0 rgba(255, 138, 61, 0.3);
}

/* ---------- 10. 坐标面包屑 ---------- */
.coord-trail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--rock);
}

.coord-trail a {
  color: var(--rock);
  text-decoration: none;
  border-bottom: 1px dashed var(--line-2);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.coord-trail a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.coord-trail [aria-current="page"] { color: var(--cyan); }

.coord-trail-sep {
  color: var(--steel);
  user-select: none;
}

/* ---------- 11. 面板 / 卡片基元 ---------- */
.panel {
  position: relative;
  background: linear-gradient(180deg, rgba(20, 58, 92, 0.5), rgba(11, 34, 57, 0.88));
  border: 1px solid var(--line-2);
  padding: clamp(18px, 2.6vw, 30px);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.panel:hover {
  border-color: rgba(57, 242, 200, 0.5);
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.panel--edge {
  border-left: 2px solid var(--cyan);
}

.panel--warm { border-left: 2px solid var(--orange); }
.panel--cool { border-left: 2px solid var(--cool); }

/* 章节滚动高亮协议 */
[data-section] {
  transition: background-color 0.5s ease;
}

[data-section].is-current .section-head h2 {
  color: var(--bone);
}

[data-section].is-current .kicker {
  color: var(--cyan);
}

/* ---------- 12. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background:
    repeating-linear-gradient(
      135deg,
      rgba(20, 58, 92, 0.9) 0 12px,
      rgba(11, 34, 57, 0.9) 12px 24px
    );
  border: 1px solid var(--line-2);
  aspect-ratio: 16 / 10;
  margin: 0;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.media-frame:hover img { transform: scale(1.03); }

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 7, 13, 0) 42%, rgba(5, 7, 13, 0.78));
  pointer-events: none;
}

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

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

.media-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.media-split .media-frame { border: 0; }
.media-split > *:first-child { border-right: 1px solid var(--line-2); }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 112px);
  background:
    linear-gradient(180deg, rgba(5, 7, 13, 0.35), rgba(5, 7, 13, 0.92)),
    var(--abyss);
  border-top: 2px solid var(--cyan);
  color: var(--bone);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    var(--scan-line) 0 1px,
    transparent 1px 7px
  );
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(40px, 5.5vw, 72px) clamp(20px, 2.6vw, 30px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.85fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.footer-brand {
  display: grid;
  gap: 14px;
}

.brand--footer .brand-name { font-size: 1.2rem; }

.footer-desc {
  color: var(--rock);
  font-size: 0.92rem;
  max-width: 40ch;
}

.footer-coord {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.16em;
  color: var(--cyan);
}

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

.footer-col {
  min-width: 0;
}

.footer-col-title {
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-1);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--cool);
}

.footer-col-list {
  display: grid;
  gap: 10px;
}

.footer-col-list a {
  color: var(--bone);
  font-size: 0.93rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.footer-col-list a:hover,
.footer-col-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.footer-contact {
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line-1);
}

.footer-contact-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px 28px;
}

.footer-contact-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.86rem;
  line-height: 1.55;
}

.footer-contact-item dt {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--rock);
}

.footer-contact-item dd {
  margin: 0;
  color: var(--bone);
  word-break: break-word;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  align-items: baseline;
  margin-top: clamp(24px, 3vw, 36px);
  padding-top: 16px;
  border-top: 1px solid var(--line-1);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.footer-legal { color: var(--rock); }

.footer-stamp {
  color: var(--cyan);
  letter-spacing: 0.14em;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1120px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    margin-left: 0;
    padding: 6px var(--gutter) 22px;
    background: linear-gradient(180deg, rgba(5, 7, 13, 0.98), rgba(11, 34, 57, 0.98));
    border-bottom: 1px solid var(--line-2);
    border-top: 1px solid var(--line-1);
    max-height: calc(100vh - var(--bar-h));
    overflow-y: auto;
  }

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

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

  .nav-link {
    padding: 15px 4px;
    font-size: 1rem;
    border-bottom: 1px solid var(--line-1);
  }

  .nav-link[aria-current="page"]::after {
    left: 4px;
    right: auto;
    bottom: -1px;
    width: 20px;
  }

  .nav-idx { font-size: 0.66rem; }
}

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

  .footer-cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  :root { --rail-h: 30px; }

  .rail-status { display: none; }

  .rail-inner {
    justify-content: space-between;
    gap: 10px;
  }

  .rail-entry {
    margin-left: 0;
    padding: 3px 9px;
  }

  .scroll-progress { height: 2px; }
}

@media (max-width: 600px) {
  .footer-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .media-split {
    grid-template-columns: 1fr;
  }

  .media-split > *:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--line-2);
  }

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

@media (max-width: 420px) {
  .brand-sub { display: none; }

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

/* ---------- 15. 减少动态偏好 ---------- */
@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;
  }

  .panel:hover,
  .btn:hover,
  .media-frame:hover img {
    transform: none;
  }

  .pulse-dot { animation: none; }
}