/* =========================================================
   /assets/site.css — 宝威体育 共享壳层
   深墨绿底 / 荧光青 + 赛道橙强调 / 粗边框硬投影 / 刻度导航
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.01em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

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

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

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

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

[hidden] {
  display: none !important;
}

/* ---------- 变量 ---------- */
:root {
  --ink: #0B1F1A;
  --ink-2: #12302A;
  --line: #1E4A40;
  --cyan: #2FF3D0;
  --cyan-dim: #17B39A;
  --orange: #FF6A2B;
  --paper: #F4EFE6;
  --muted: #8FA9A2;
  --black: #05100D;

  --edge: 2px solid var(--line);
  --edge-strong: 2px solid var(--cyan);
  --shadow-hard: 8px 8px 0 var(--black);
  --shadow-soft: 4px 4px 0 var(--black);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;

  --shell: 1240px;
  --gutter: 16px;

  --space-1: 8px;
  --space-2: 14px;
  --space-3: 22px;
  --space-4: 32px;
  --space-5: 52px;

  --dur: 160ms;
  --dur-fast: 120ms;
  --ease: cubic-bezier(0.2, 0.6, 0.3, 1);
}

/* ---------- 中文排版基调 ---------- */
h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
  font-stretch: condensed;
}

h1 { font-size: clamp(38px, 7vw, 84px); line-height: 1.04; }
h2 { font-size: clamp(26px, 3.6vw, 44px); }
h3 { font-size: clamp(19px, 2vw, 26px); }
h4 { font-size: 17px; }

p {
  line-height: 1.55;
  letter-spacing: 0.01em;
}

strong { color: var(--paper); font-weight: 800; }

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

/* ---------- 焦点与可访问性 ---------- */
:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

.panel--paper :focus-visible,
.media-frame :focus-visible {
  outline-color: var(--orange);
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -72px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  border: 2px solid var(--black);
  box-shadow: var(--shadow-soft);
  transition: top var(--dur) linear;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 10px;
}

/* =========================================================
   头部：双层信息导航
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink);
  border-bottom: 2px solid var(--line);
  box-shadow: 0 6px 0 rgba(5, 16, 13, 0.5);
}

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

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border: 2px solid var(--cyan);
  background: var(--ink-2);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-soft);
  transition: border-color var(--dur) linear, color var(--dur) linear;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-name {
  display: block;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--paper);
  line-height: 1.1;
}

.brand-note {
  display: block;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.header-utility {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.utility-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  white-space: nowrap;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  background: var(--cyan);
  box-shadow: 0 0 0 2px var(--ink-2);
}

.utility-link {
  display: inline-block;
  padding: 9px 16px;
  border: var(--edge);
  background: var(--ink-2);
  color: var(--paper);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  box-shadow: var(--shadow-soft);
  transition: transform var(--dur) linear, box-shadow var(--dur) linear,
    border-color var(--dur) linear, color var(--dur) linear;
}

.utility-link:hover,
.utility-link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--black);
}

.utility-link:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--black);
}

/* 第二层：横向刻度条导航 */
.header-nav-row {
  position: relative;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: var(--space-2);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 14px 2px;
  color: var(--paper);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.nav-toggle-bars {
  position: relative;
  width: 24px;
  height: 12px;
  flex: 0 0 auto;
  border-top: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
}

.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 3px;
  height: 2px;
  background: var(--orange);
  transition: opacity var(--dur) linear, transform var(--dur) linear;
}

.site-header[data-open="true"] .nav-toggle-bars::after {
  opacity: 0;
  transform: scaleX(0.4);
}

.nav-toggle-text {
  text-transform: uppercase;
}

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
}

.nav-item {
  display: flex;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 15px 16px;
  border-right: 1px solid var(--line);
  color: var(--paper);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: background var(--dur) linear, color var(--dur) linear;
}

.nav-item:first-child .nav-link {
  border-left: 1px solid var(--line);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color var(--dur) linear;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  background: var(--ink-2);
  color: var(--cyan);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

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

.nav-link[aria-current="page"] {
  background: var(--ink-2);
  color: var(--paper);
}

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

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

.nav-hint {
  align-self: center;
  margin: 0;
  padding: 0 4px 0 var(--space-2);
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* 滚动刻度线 */
.header-tick {
  position: relative;
  height: 5px;
  overflow: hidden;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 2px, transparent 2px 14px);
  background-color: var(--ink-2);
}

.header-tick-fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(47, 243, 208, 0.45);
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  margin-top: var(--space-5);
  background: var(--ink-2);
  border-top: 2px solid var(--line);
  color: var(--paper);
}

.footer-inner {
  width: min(var(--shell), 100% - (var(--gutter) * 2));
  margin-inline: auto;
  padding: var(--space-5) 0 var(--space-3);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.85fr 1.3fr 0.85fr;
  gap: var(--space-4);
  align-items: start;
}

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

.footer-brand-name {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.footer-brand-en {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid var(--line);
  padding: 2px 6px;
}

.footer-tagline {
  margin-top: 12px;
  max-width: 26em;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.footer-heading {
  padding-bottom: 8px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

.footer-list a {
  display: inline-block;
  font-size: 14px;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) linear, border-color var(--dur) linear;
}

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

.footer-contact dt {
  margin-top: 12px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-contact dt:first-child {
  margin-top: 0;
}

.footer-contact dd {
  margin: 3px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--paper);
  word-break: break-word;
}

.footer-note {
  margin-top: 16px;
  padding-left: 10px;
  border-left: 3px solid var(--orange);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.footer-legal-list {
  margin-bottom: 18px;
}

.footer-icp {
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.footer-tick {
  height: 12px;
  margin-top: var(--space-5);
  border-top: 1px solid var(--line);
  background-image: repeating-linear-gradient(90deg, var(--line) 0 2px, transparent 2px 16px);
  background-position: 0 0;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 16px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* =========================================================
   共享内容件
   ========================================================= */
.container {
  width: min(var(--shell), 100% - (var(--gutter) * 2));
  margin-inline: auto;
}

.section {
  padding: var(--space-5) 0;
}

.section--tight {
  padding: var(--space-4) 0;
}

.rule {
  height: 2px;
  border: 0;
  margin: 0;
  background: var(--line);
}

.label {
  display: inline-block;
  padding-bottom: 3px;
  border-bottom: 2px solid currentColor;
  color: var(--cyan);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.label--orange { color: var(--orange); }
.label--muted { color: var(--muted); }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: 2px solid var(--line);
  background: var(--ink-2);
  color: var(--paper);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.05em;
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  transition: transform var(--dur) linear, box-shadow var(--dur) linear,
    border-color var(--dur) linear, background var(--dur) linear, color var(--dur) linear;
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--black);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--black);
}

.btn--primary {
  background: var(--cyan);
  border-color: var(--black);
  color: var(--ink);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--cyan-dim);
  border-color: var(--black);
  color: var(--black);
}

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

.btn--orange {
  background: var(--orange);
  border-color: var(--black);
  color: var(--black);
}

.panel {
  padding: var(--space-3);
  background: var(--ink-2);
  border: var(--edge);
  box-shadow: var(--shadow-hard);
}

.panel--paper {
  background: var(--paper);
  border-color: var(--black);
  color: var(--ink);
}

.panel--flush {
  padding: 0;
}

.grid {
  display: grid;
  gap: var(--space-3);
}

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

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

.grid--aside {
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: var(--space-4);
  align-items: start;
}

/* 面包屑 */
.breadcrumb {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.05em;
}

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

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

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

.breadcrumb a {
  border-bottom: 1px solid transparent;
  transition: color var(--dur) linear, border-color var(--dur) linear;
}

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

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

/* 图片容器基础规则 */
.media-frame {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--ink-2);
  border: var(--edge);
  box-shadow: var(--shadow-hard);
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(47, 243, 208, 0.18) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(47, 243, 208, 0.18) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.5;
  mix-blend-mode: screen;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 6px 10px;
  background: var(--ink);
  border-top: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* 主题筛选（仅筛选当前页已有条目） */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.filter-btn {
  padding: 8px 14px;
  border: 2px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--dur) linear, border-color var(--dur) linear,
    background var(--dur) linear, box-shadow var(--dur) linear;
}

.filter-btn:hover,
.filter-btn:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.filter-btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--black);
  color: var(--ink);
  box-shadow: var(--shadow-soft);
}

.filter-status {
  margin-left: auto;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* 侧边轮次索引 */
.toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 2px solid var(--line);
}

.toc-link {
  display: block;
  margin-left: -2px;
  padding: 9px 14px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.03em;
  transition: color var(--dur) linear, border-color var(--dur) linear, background var(--dur) linear;
}

.toc-link:hover,
.toc-link:focus-visible {
  color: var(--paper);
  background: var(--ink-2);
}

.toc-link.is-active {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--ink-2);
}

/* 入场显现 */
html.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 200ms linear, transform 200ms var(--ease);
}

html.has-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .nav-link { padding: 14px 11px; font-size: 13px; }
  .nav-hint { display: none; }
  .footer-grid { grid-template-columns: 1.3fr 1fr 1.2fr; }
  .footer-legal-col { grid-column: 1 / -1; }
  .footer-tick { margin-top: var(--space-4); }
}

@media (max-width: 880px) {
  html { scroll-padding-top: 112px; }

  .header-top { padding: 10px 0; }
  .brand-note { display: none; }
  .brand-mark { width: 40px; height: 40px; }
  .brand-name { font-size: 18px; }
  .utility-status { display: none; }
  .utility-link { padding: 8px 12px; font-size: 12px; }

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

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    background: var(--ink-2);
    border-top: 2px solid var(--line);
    border-bottom: 2px solid var(--line);
    box-shadow: 0 8px 0 var(--black);
  }

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

  .nav-list {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .nav-item { width: 100%; }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 16px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }

  .nav-item:first-child .nav-link { border-left: 0; }
  .nav-link::after { height: 2px; }

  .header-tick { height: 4px; }

  .grid--halves,
  .grid--third,
  .grid--aside {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-3);
  }

  .section { padding: var(--space-4) 0; }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .footer-brand-col { grid-column: 1 / -1; }
  .footer-legal-col { grid-column: auto; }
  .filter-status { margin-left: 0; flex-basis: 100%; }
}

@media (max-width: 600px) {
  :root { --gutter: 14px; --space-5: 40px; --space-4: 26px; }

  body { font-size: 15px; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-meta { flex-direction: column; gap: 8px; }
  .media-frame { aspect-ratio: 4 / 3; }
  .media-frame--wide { aspect-ratio: 16 / 9; }
  .panel { padding: var(--space-2); box-shadow: 6px 6px 0 var(--black); }
}

/* 减少动效与降低对比偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  html.has-reveal [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn:hover,
  .utility-link:hover {
    transform: none;
  }
}