/* ============================================================
   纯净赛场 · /assets/site.css
   共享外壳：重置 / 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%; }

body {
  margin: 0;
  background-color: #071B2C;
  color: #F7FAF8;
}

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

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

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

a { color: inherit; }

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

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色板 */
  --night: #071B2C;
  --tactic: #0E2E46;
  --paper: #F1E8D8;
  --ink: #10171C;
  --mint: #35F2C0;
  --red: #C6413F;
  --yellow: #F3C14B;
  --mist: #82919B;
  --line: #27475E;
  --white: #F7FAF8;

  /* 字体族 */
  --display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "IBM Plex Mono", "Noto Sans Mono CJK SC", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --body: "Noto Sans SC", "Inter", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 尺寸与节奏 */
  --wrap: 1240px;
  --bar-w: 1400px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --hair: 1px;
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.7;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0;
  color: var(--white);
}

p, li { text-wrap: pretty; }

.mono {
  font-family: var(--mono);
  letter-spacing: .12em;
  font-size: .72rem;
  text-transform: uppercase;
}

/* ---------- 4. 无障碍与焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
  border-radius: 1px;
}

.skip-link {
  position: absolute;
  top: -120%;
  left: 1rem;
  z-index: 200;
  padding: .7rem 1.1rem;
  background-color: var(--mint);
  color: #04141B;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .14em;
  font-weight: 700;
  text-decoration: none;
  transition: top .18s var(--ease);
}

.skip-link:focus {
  top: .7rem;
}

/* ---------- 5. 布局容器与栅格 ---------- */
.wrap {
  width: min(var(--wrap), calc(100% - 3rem));
  margin-inline: auto;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1.5rem;
}

.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-5  { grid-column: span 5; }
.col-6  { grid-column: span 6; }
.col-7  { grid-column: span 7; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.rule {
  height: var(--hair);
  border: 0;
  background-image: linear-gradient(90deg, var(--line), rgba(39, 71, 94, .15) 70%, transparent);
  margin: 0;
}

/* ---------- 6. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 1.2rem;
  border: var(--hair) solid transparent;
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .14em;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.btn--mint {
  background-color: var(--mint);
  border-color: var(--mint);
  color: #04141B;
}

.btn--mint:hover {
  background-color: transparent;
  color: var(--mint);
}

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

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

.btn--sm {
  padding: .55rem .8rem;
  font-size: .64rem;
  letter-spacing: .12em;
}

/* ---------- 7. 索引标签与芯片 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .28rem .6rem;
  border: var(--hair) solid var(--line);
  background-color: rgba(14, 46, 70, .55);
  color: var(--mist);
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .14em;
  line-height: 1.4;
  text-transform: uppercase;
}

.chip--mint   { color: var(--mint);   border-color: rgba(53, 242, 192, .45); }
.chip--yellow { color: var(--yellow); border-color: rgba(243, 193, 75, .45); }
.chip--red    { color: var(--red);    border-color: rgba(198, 65, 63, .5); }

/* ---------- 8. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .14em;
  color: var(--mist);
  text-transform: uppercase;
}

.crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: var(--hair) solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.crumbs a:hover {
  color: var(--mint);
  border-bottom-color: rgba(53, 242, 192, .5);
}

.crumbs__sep {
  color: var(--line);
}

/* ---------- 9. 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: 1.03rem;
  line-height: 1.8;
}

.prose > * + * { margin-top: 1.1em; }

.prose h2, .prose h3 { margin-top: 2em; }

.lede {
  max-width: 58ch;
  font-size: 1.15rem;
  line-height: 1.75;
  color: rgba(247, 250, 248, .82);
}

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

.paper h1, .paper h2, .paper h3, .paper h4 { color: var(--ink); }
.paper .lede { color: #26333B; }
.paper .crumbs, .paper .crumbs a { color: #566069; }

/* ---------- 10. 图片容器基础规则 ---------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background-color: var(--tactic);
  border: var(--hair) solid var(--line);
}

.figure img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(53, 242, 192, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 242, 192, .07) 1px, transparent 1px);
  background-size: 34px 34px;
}

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

.figure__caption {
  margin-top: .55rem;
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .12em;
  color: var(--mist);
}

/* ---------- 11. 头部命令栏 ---------- */
.cmd-bar {
  position: sticky;
  top: 0;
  z-index: 90;
  color: var(--white);
  background-color: rgba(7, 27, 44, .94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: var(--hair) solid var(--line);
}

.cmd-bar::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: linear-gradient(90deg, rgba(39, 71, 94, .55) 1px, transparent 1px);
  background-size: 96px 100%;
  opacity: .35;
}

.cmd-bar__grid {
  width: min(var(--bar-w), calc(100% - 2.5rem));
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1.75rem;
  padding: .8rem 0;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  min-width: 0;
  color: var(--white);
  text-decoration: none;
}

.brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: var(--hair) solid rgba(53, 242, 192, .55);
  background-color: rgba(53, 242, 192, .06);
}

.brand__mark::before {
  content: "";
  width: 13px;
  height: 13px;
  border: var(--hair) solid var(--mint);
  border-radius: 50%;
}

.brand__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: var(--hair);
  background-color: rgba(53, 242, 192, .45);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: .18rem;
  min-width: 0;
}

.brand__name {
  font-family: var(--display);
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--white);
}

.brand__sub {
  font-family: var(--mono);
  font-size: .58rem;
  line-height: 1.3;
  letter-spacing: .16em;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 导航 */
.cmd-nav { min-width: 0; }

.cmd-nav__list {
  display: flex;
  align-items: center;
  gap: .12rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cmd-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  padding: .45rem .62rem;
  border-bottom: 2px solid transparent;
  font-size: .88rem;
  font-weight: 500;
  line-height: 1.2;
  color: rgba(247, 250, 248, .72);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.cmd-nav__link:hover {
  color: var(--white);
  background-color: rgba(53, 242, 192, .07);
}

.cmd-nav__idx {
  font-family: var(--mono);
  font-size: .56rem;
  letter-spacing: .08em;
  color: rgba(130, 145, 155, .9);
  transition: color .2s var(--ease);
}

.cmd-nav__link:hover .cmd-nav__idx { color: var(--mint); }

.cmd-nav__link[aria-current="page"] {
  color: var(--mint);
  border-bottom-color: var(--mint);
  background-color: rgba(53, 242, 192, .05);
}

.cmd-nav__link[aria-current="page"] .cmd-nav__idx { color: var(--mint); }

/* 操作区 */
.cmd-bar__actions {
  display: flex;
  align-items: center;
  gap: .6rem;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .5rem;
  padding: .5rem .65rem;
  border: var(--hair) solid var(--line);
  color: var(--white);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

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

.nav-toggle__label {
  font-family: var(--mono);
  font-size: .6rem;
  letter-spacing: .16em;
  color: inherit;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--mint);
  transition: background-color .2s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: var(--mint);
  transition: transform .2s var(--ease), top .2s var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after  { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background-color: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after  { top: 0; transform: rotate(-45deg); }

/* 滚动进度 */
.cmd-bar__progress {
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-image: linear-gradient(90deg, var(--mint), rgba(53, 242, 192, .18));
  pointer-events: none;
}

/* ---------- 12. 页脚 ---------- */
.site-foot {
  position: relative;
  overflow: hidden;
  color: rgba(247, 250, 248, .78);
  background-color: var(--night);
  border-top: var(--hair) solid var(--line);
}

.site-foot::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image: repeating-radial-gradient(circle at 92% -12%,
    rgba(39, 71, 94, .85) 0 1px,
    transparent 1px 46px);
}

.site-foot::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 62%;
  height: var(--hair);
  background-image: linear-gradient(90deg, var(--mint), rgba(53, 242, 192, 0));
  pointer-events: none;
}

.site-foot__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, .85fr) minmax(0, .85fr) minmax(0, 1.25fr);
  gap: 2.5rem;
  padding: 3.75rem 0 2.75rem;
}

.site-foot__wordmark {
  font-family: var(--display);
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: .08em;
  line-height: 1;
  color: var(--white);
}

.site-foot__statement {
  max-width: 34ch;
  margin-top: 1rem;
  font-size: .92rem;
  line-height: 1.75;
  color: rgba(247, 250, 248, .68);
}

.site-foot__region {
  margin-top: 1.1rem;
  color: var(--mist);
}

.site-foot__heading {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: 1rem;
  font-family: var(--mono);
  font-size: .64rem;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--mint);
  text-transform: uppercase;
}

.site-foot__heading::before {
  content: "";
  width: 16px;
  height: var(--hair);
  background-color: var(--mint);
  flex: 0 0 auto;
}

.site-foot__list {
  display: grid;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-foot__link {
  display: inline-block;
  border-bottom: var(--hair) solid transparent;
  font-size: .9rem;
  color: rgba(247, 250, 248, .74);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.site-foot__link:hover {
  color: var(--mint);
  border-bottom-color: rgba(53, 242, 192, .5);
}

.site-foot__link--sm {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .1em;
}

.site-foot__address {
  display: grid;
  gap: .65rem;
  font-style: normal;
}

.site-foot__line {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: .6rem;
  font-size: .86rem;
  line-height: 1.65;
  color: rgba(247, 250, 248, .78);
  word-break: break-word;
}

.site-foot__key {
  color: var(--yellow);
  font-size: .58rem;
  letter-spacing: .12em;
  padding-top: .28rem;
}

.site-foot__note {
  margin-top: 1.1rem;
  padding-left: .8rem;
  border-left: 2px solid rgba(243, 193, 75, .45);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--mist);
}

.site-foot__base {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .85rem 1.5rem;
  padding: 1.2rem 0 1.6rem;
  border-top: var(--hair) solid rgba(39, 71, 94, .85);
  font-size: .78rem;
  color: var(--mist);
}

.site-foot__copy { letter-spacing: .04em; }

.site-foot__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .7rem;
}

.site-foot__icp { color: var(--mist); }
.site-foot__sep { color: var(--line); }

/* ---------- 13. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .45s var(--ease), transform .45s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

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

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1180px) {
  .cmd-bar__grid { gap: 1rem; padding: .7rem 0; }
  .cmd-nav__link { padding: .45rem .45rem; font-size: .84rem; }
}

@media (max-width: 1080px) {
  .cmd-bar__grid {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: .8rem;
  }

  .cmd-nav {
    display: none;
    grid-column: 1 / -1;
    order: 3;
  }

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

  .cmd-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-top: .3rem;
    padding-top: .3rem;
    border-top: var(--hair) solid rgba(39, 71, 94, .85);
  }

  .cmd-nav__link {
    display: flex;
    justify-content: flex-start;
    gap: .8rem;
    padding: .72rem .2rem;
    border-bottom: var(--hair) solid rgba(39, 71, 94, .7);
  }

  .cmd-nav__link[aria-current="page"] {
    border-bottom-color: rgba(53, 242, 192, .6);
  }

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

@media (max-width: 960px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9 { grid-column: span 6; }

  .site-foot__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
    padding: 3rem 0 2rem;
  }
}

@media (max-width: 620px) {
  body { font-size: 16px; }

  .wrap { width: calc(100% - 2rem); }

  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .grid-12 > [class*="col-"] { grid-column: span 1; }

  .site-foot__inner { grid-template-columns: minmax(0, 1fr); gap: 1.9rem; padding: 2.5rem 0 1.75rem; }
  .site-foot__base { justify-content: flex-start; padding-bottom: 1.4rem; }
  .site-foot__statement { max-width: none; }
}

@media (max-width: 520px) {
  .cmd-bar__grid {
    width: calc(100% - 1.5rem);
    gap: .55rem;
    padding: .65rem 0;
  }

  .brand__mark { width: 30px; height: 30px; }
  .brand__mark::before { width: 11px; height: 11px; }
  .brand__name { font-size: 1.08rem; letter-spacing: .04em; }
  .brand__sub { display: none; }

  .btn--sm { padding: .5rem .58rem; font-size: .56rem; letter-spacing: .08em; }
  .nav-toggle { padding: .45rem .5rem; }
  .nav-toggle__label { display: none; }
}

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

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
    transition-delay: 0ms;
  }

  .cmd-bar__progress { transition: none; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}