/* ==========================================================================
   三亿赛场 · site.css
   reset / tokens / 中文排版 / 共享头部与页脚 / 通用组件 / 图片容器 / 响应式
   ========================================================================== */

*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

a { color: inherit; }

:root {
  --ink-night: #06110F;
  --board-deep: #0C2B24;
  --board-lift: #123F35;
  --cyan: #00F0C8;
  --cyan-soft: #7CFFE4;
  --amber: #FFB020;
  --card-red: #E8452F;
  --card-yellow: #FFD400;
  --white: #E9F4F1;
  --mist: #8FA9A2;

  --line: rgba(124, 255, 228, 0.16);
  --line-soft: rgba(124, 255, 228, 0.08);
  --line-strong: rgba(0, 240, 200, 0.45);

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

  --fs-1: clamp(38px, 7vw, 72px);
  --fs-2: clamp(28px, 4.6vw, 48px);
  --fs-3: clamp(21px, 2.6vw, 28px);
  --fs-4: 17px;
  --fs-5: 13px;

  --shell: 1320px;
  --gutter: clamp(16px, 4vw, 40px);
  --cut: 16px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* --------------------------------------------------------------------------
   基础画布：夜场草坪网格 + 冷光晕
   -------------------------------------------------------------------------- */
body {
  min-height: 100vh;
  background-color: var(--ink-night);
  background-image:
    radial-gradient(circle at 16% -12%, rgba(0, 240, 200, 0.12), transparent 46%),
    radial-gradient(circle at 92% 6%, rgba(255, 176, 32, 0.07), transparent 42%),
    repeating-linear-gradient(90deg, rgba(124, 255, 228, 0.045) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(124, 255, 228, 0.045) 0 1px, transparent 1px 64px);
  background-attachment: fixed;
  color: var(--white);
  font-family: var(--font-body);
  font-size: var(--fs-4);
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

#main-content {
  display: block;
  scroll-margin-top: 148px;
}

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

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Skip link
   -------------------------------------------------------------------------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 12px 22px;
  background: var(--amber);
  color: var(--ink-night);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: 2px;
  transition: top 140ms var(--ease);
}

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

/* --------------------------------------------------------------------------
   共享头部
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background:
    linear-gradient(180deg, rgba(6, 17, 15, 0.98) 0%, rgba(6, 17, 15, 0.92) 100%);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-rail,
.header-core,
.masthead-nav {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.header-rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 8px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.rail-note {
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rail-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.rail-link {
  display: inline-block;
  padding: 4px 10px;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color 140ms var(--ease), border-color 140ms var(--ease),
    background-color 140ms var(--ease);
}

.rail-link:hover,
.rail-link:focus-visible {
  color: var(--cyan);
  border-color: var(--line-strong);
  background: rgba(0, 240, 200, 0.07);
}

.header-core {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding-block: 14px 12px;
}

/* 字标 */
.brand {
  grid-column: 2;
  justify-self: center;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  text-decoration: none;
  color: var(--white);
  padding: 2px 6px;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: clamp(23px, 3.2vw, 36px);
  font-weight: 900;
  font-stretch: condensed;
  line-height: 1;
  letter-spacing: 0.09em;
  color: var(--white);
  transition: color 140ms var(--ease);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  color: var(--cyan);
}

/* 移动导航按钮 */
.nav-toggle {
  grid-column: 1;
  justify-self: start;
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  min-width: 44px;
  padding: 0 12px 0 2px;
  background: transparent;
  border: 0;
  border-radius: 2px;
  color: var(--cyan-soft);
  font-size: 13px;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 22px;
  height: 2px;
  background: var(--cyan);
  transition: background-color 140ms var(--ease);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--cyan);
  transition: transform 160ms var(--ease);
}

.nav-toggle-bars::before { top: -7px; }
.nav-toggle-bars::after { top: 7px; }

.site-header[data-open] .nav-toggle-bars { background: transparent; }
.site-header[data-open] .nav-toggle-bars::before { transform: translateY(7px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars::after { transform: translateY(-7px) rotate(-45deg); }

.nav-toggle-text {
  font-family: var(--font-mono);
}

/* 右侧工具区 */
.header-tools {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

.focus-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 16px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 160ms var(--ease), color 160ms var(--ease),
    border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

.focus-toggle:hover {
  background: rgba(0, 240, 200, 0.1);
  border-color: var(--cyan);
  color: var(--cyan);
}

.focus-toggle-dot {
  width: 9px;
  height: 9px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  background: transparent;
  transition: background-color 160ms var(--ease), border-color 160ms var(--ease);
}

.focus-toggle[aria-pressed="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink-night);
  box-shadow: 0 0 0 3px rgba(255, 176, 32, 0.16);
}

.focus-toggle[aria-pressed="true"] .focus-toggle-dot {
  background: var(--ink-night);
  border-color: var(--ink-night);
}

/* 刊头导航 */
.masthead-nav {
  border-top: 1px solid var(--line-soft);
  padding-bottom: 2px;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(4px, 2.4vw, 30px);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 12px 4px 13px;
  color: var(--mist);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-decoration: none;
  transition: color 140ms var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 6px;
  height: 2px;
  background: var(--cyan);
  transition: right 140ms var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--white);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after {
  right: 0;
}

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

/* --------------------------------------------------------------------------
   共享页脚
   -------------------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background:
    linear-gradient(180deg, rgba(12, 43, 36, 0.96) 0%, rgba(6, 17, 15, 0.99) 100%);
  border-top: 1px solid var(--line-strong);
  color: var(--white);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 42%, var(--amber) 42%, var(--amber) 58%, transparent 58%);
}

.footer-inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(36px, 5vw, 64px) var(--gutter) clamp(20px, 3vw, 32px);
}

.footer-mast {
  padding-bottom: clamp(24px, 3.5vw, 40px);
  border-bottom: 1px solid var(--line-soft);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: clamp(34px, 7vw, 74px);
  font-weight: 900;
  font-stretch: condensed;
  line-height: 1;
  letter-spacing: 0.14em;
  color: rgba(124, 255, 228, 0.62);
}

.footer-tag {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--mist);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 44px);
  padding-block: clamp(26px, 3.5vw, 42px);
}

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.footer-col-title::after {
  content: "";
  display: block;
  width: 22px;
  height: 1px;
  margin-top: 8px;
  background: var(--amber);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15px;
}

.footer-links a {
  position: relative;
  display: inline-block;
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 140ms var(--ease), border-color 140ms var(--ease);
}

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

.footer-links--plain {
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.footer-links--plain span {
  display: block;
  overflow-wrap: anywhere;
}

.footer-note {
  padding-block: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 76ch;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.footer-legal,
.footer-copy {
  margin: 0;
}

/* --------------------------------------------------------------------------
   布局容器与网格
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.2vw, 28px);
}

.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-7 { grid-column: span 7; }
.col-span-8 { grid-column: span 8; }
.col-span-12 { grid-column: span 12; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: clamp(16px, 2.6vw, 28px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

/* --------------------------------------------------------------------------
   面板与色带
   -------------------------------------------------------------------------- */
.panel {
  background: var(--board-deep);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: clamp(20px, 3vw, 34px);
}

.panel--lift {
  background: var(--board-lift);
}

.panel--cut {
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.band {
  display: block;
  width: 100%;
  padding: 14px clamp(16px, 3vw, 32px);
  background: var(--amber);
  color: var(--ink-night);
  font-weight: 800;
  letter-spacing: 0.06em;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   排版梯度
   -------------------------------------------------------------------------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.display-1 {
  font-family: var(--font-display);
  font-size: var(--fs-1);
  font-weight: 900;
  font-stretch: condensed;
  line-height: 1.02;
  letter-spacing: -0.01em;
}

.display-2 {
  font-family: var(--font-display);
  font-size: var(--fs-2);
  font-weight: 900;
  font-stretch: condensed;
  line-height: 1.08;
  letter-spacing: -0.005em;
}

.display-3 {
  font-family: var(--font-display);
  font-size: var(--fs-3);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.lede {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.7;
  color: var(--mist);
  max-width: 62ch;
}

.prose {
  max-width: 68ch;
  font-size: var(--fs-4);
  line-height: 1.78;
}

.prose p + p { margin-top: 0.9em; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}

.prose h2 { font-size: var(--fs-3); }
.prose h3 { font-size: var(--fs-4); letter-spacing: 0.02em; }

.prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.vertical-note {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--mist);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   标签 / 红黄牌符号
   -------------------------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: rgba(0, 240, 200, 0.08);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.6;
}

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

.tag--red {
  background: var(--card-red);
  border-color: var(--card-red);
  color: #fff;
  font-weight: 700;
}

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

/* --------------------------------------------------------------------------
   按钮
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms var(--ease), color 160ms var(--ease),
    border-color 160ms var(--ease), transform 160ms var(--ease);
}

.btn--primary {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink-night);
}

.btn--primary:hover {
  background: #FFC65C;
  border-color: #FFC65C;
}

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

.btn--ghost:hover {
  background: rgba(0, 240, 200, 0.1);
  border-color: var(--cyan);
  color: var(--cyan);
}

/* --------------------------------------------------------------------------
   面包屑
   -------------------------------------------------------------------------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

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

.crumbs li:not(:last-child)::after {
  content: "/";
  color: rgba(143, 169, 162, 0.55);
}

.crumbs a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 140ms var(--ease), border-color 140ms var(--ease);
}

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

.crumbs [aria-current="page"] {
  color: var(--white);
}

/* --------------------------------------------------------------------------
   图片容器基础规则
   -------------------------------------------------------------------------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    repeating-linear-gradient(90deg, rgba(124, 255, 228, 0.09) 0 1px, transparent 1px 36px),
    repeating-linear-gradient(0deg, rgba(124, 255, 228, 0.09) 0 1px, transparent 1px 36px),
    linear-gradient(140deg, var(--board-lift) 0%, var(--board-deep) 58%, #071A16 100%);
  border: 1px solid var(--line);
  border-radius: 2px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

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

.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: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   「只看重点场次」联动
   -------------------------------------------------------------------------- */
body[data-focus-only="true"] .match--normal {
  display: none !important;
}

/* --------------------------------------------------------------------------
   响应式：平板 / 手机
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .col-span-3,
  .col-span-4,
  .col-span-5,
  .col-span-7,
  .col-span-8,
  .col-span-12 { grid-column: 1 / -1; }

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

@media (max-width: 860px) {
  #main-content { scroll-margin-top: 112px; }

  .header-core {
    grid-template-columns: auto 1fr auto;
    gap: 8px;
    padding-block: 10px;
  }

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

  .brand { grid-column: 2; }
  .brand-sub { display: none; }

  .header-tools { grid-column: 3; }

  .focus-toggle {
    padding: 0 11px;
    font-size: 11.5px;
    letter-spacing: 0.04em;
    gap: 7px;
  }

  .masthead-nav {
    display: block;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    border-top: 1px solid var(--line);
    transition: max-height 220ms var(--ease), opacity 160ms var(--ease),
      visibility 0s linear 220ms;
  }

  .site-header[data-open] .masthead-nav {
    max-height: 520px;
    opacity: 1;
    visibility: visible;
    padding-bottom: 12px;
    transition: max-height 240ms var(--ease), opacity 180ms var(--ease),
      visibility 0s linear 0s;
  }

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

  .nav-list li + li { border-top: 1px solid var(--line-soft); }

  .nav-link {
    display: block;
    padding: 15px 4px;
    font-size: 16px;
    letter-spacing: 0.12em;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    color: var(--cyan);
    box-shadow: inset 3px 0 0 var(--amber);
    padding-left: 14px;
  }

  .footer-brand { letter-spacing: 0.1em; }
}

@media (max-width: 720px) {
  .header-rail { display: none; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .focus-toggle { padding: 0 8px; }
  .focus-toggle-dot { display: none; }
}

@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;
    transition-delay: 0s !important;
    scroll-behavior: auto !important;
  }
}