/* ==========================================================================
   /assets/site.css — 共享外壳：变量、排版、命令栏页头、档案式页脚、基础组件
   ========================================================================== */

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

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

body {
  margin: 0;
  background-color: #0B1D33;
  color: #FDFBF7;
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button { font: inherit; color: inherit; }

ul, ol { margin: 0; padding: 0; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.6em;
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.005em;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4.8rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.2rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.35rem); }

p { margin: 0 0 1em; }

hr { border: 0; }

[id] { scroll-margin-top: 108px; }

:focus-visible {
  outline: 2px solid #28E0C8;
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 变量 ---------- */
:root {
  --ink: #0B1D33;
  --ink-2: #13293F;
  --ink-3: #0A1728;
  --cyan: #28E0C8;
  --cyan-soft: #8CF4E7;
  --amber: #F2B441;
  --paper: #F4EFE6;
  --paper-2: #DFD6C7;
  --paper-3: #EDE7DC;
  --ink-text: #14202E;
  --cream: #FDFBF7;
  --slate: #7C93AA;
  --prism: #8A7BFF;

  --line-dark: rgba(140, 244, 231, 0.16);
  --line-dark-soft: rgba(140, 244, 231, 0.09);
  --line-light: rgba(20, 32, 46, 0.14);

  --shadow-soft: 0 1px 0 rgba(255, 255, 255, 0.05), 0 18px 38px -26px rgba(0, 0, 0, 0.85);
  --shadow-card: 0 1px 0 rgba(20, 32, 46, 0.05), 0 14px 28px -22px rgba(11, 29, 51, 0.55);

  --radius: 4px;
  --radius-lg: 8px;

  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --fs-xs: 12px;
  --fs-sm: 14px;
  --fs-base: 17px;
  --fs-md: 20px;
  --fs-lg: 25px;
  --fs-xl: 31px;
  --fs-2xl: 39px;
  --fs-3xl: 49px;
  --fs-4xl: 61px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 布局容器 ---------- */
.shell,
.cmdbar__inner,
.footer__inner,
.footer__base {
  width: min(1440px, 100% - 8vw);
  margin-inline: auto;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--radius);
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  transition: top 0.2s var(--ease);
}

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

/* ---------- 通用文字工具 ---------- */
.text-ink { color: var(--ink-text); }
.text-cream { color: var(--cream); }
.text-muted { color: var(--slate); }
.text-cyan { color: var(--cyan); }
.text-amber { color: var(--amber); }

.eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.lede {
  margin: 0 0 1.1em;
  max-width: 52ch;
  font-size: clamp(1rem, 1.35vw, 1.125rem);
  line-height: 1.8;
  color: rgba(253, 251, 247, 0.84);
}

.prose {
  max-width: 46ch;
  font-size: var(--fs-base);
  line-height: 1.75;
}

.prose p:last-child { margin-bottom: 0; }

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  color: var(--slate);
}

.divider {
  height: 1px;
  margin: 0;
  border: 0;
  background: var(--line-dark);
}

.stack { display: grid; gap: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 700;
}

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

.btn--ghost {
  border-color: rgba(140, 244, 231, 0.35);
  color: var(--cream);
}

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

.btn--amber {
  border-color: rgba(242, 180, 65, 0.45);
  color: var(--amber);
}

.btn--amber:hover,
.btn--amber:focus-visible {
  border-color: var(--amber);
  background: rgba(242, 180, 65, 0.12);
}

.btn--block { width: 100%; }

/* ==========================================================================
   命令栏页头
   ========================================================================== */
.cmdbar {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(11, 29, 51, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-dark);
}

.cmdbar__inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "brand nav actions"
    "strip strip strip";
  align-items: center;
  gap: 4px 22px;
  padding: 13px 0 0;
  transition: padding 0.24s var(--ease);
}

/* 品牌 */
.brand {
  grid-area: brand;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(40, 224, 200, 0.75);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(40, 224, 200, 0.18), rgba(40, 224, 200, 0));
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: width 0.24s var(--ease), height 0.24s var(--ease);
}

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

.brand__name {
  color: var(--cream);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.brand__sub {
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

/* 索引式栏目 */
.cmd-index {
  grid-area: nav;
  min-width: 0;
}

.cmd-index__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2px 14px;
  list-style: none;
}

.cmd-index__item { display: block; }

.cmd-index__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 2px;
  color: rgba(253, 251, 247, 0.84);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.cmd-index__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.cmd-index__link:hover,
.cmd-index__link:focus-visible { color: var(--cyan-soft); }

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

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

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

.cmd-index__num {
  color: var(--slate);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.cmd-index__link[aria-current="page"] .cmd-index__num { color: var(--amber); }

/* 右侧动作 */
.cmd-actions {
  grid-area: actions;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid rgba(140, 244, 231, 0.28);
  border-radius: var(--radius);
  background: transparent;
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  cursor: pointer;
}

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

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 14px;
}

.nav-toggle__bar {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

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

.cmdbar[data-open] .nav-toggle__bar:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.cmdbar[data-open] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.cmdbar[data-open] .nav-toggle__bar:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

/* 信号带 */
.cmd-strip {
  grid-area: strip;
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 30px;
  padding: 7px 0 8px;
  border-top: 1px solid var(--line-dark-soft);
  transition: padding 0.24s var(--ease);
}

.cmd-status {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.03em;
  color: var(--slate);
}

.cmd-status__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(40, 224, 200, 0.14);
  animation: man-pulse 2.4s ease-in-out infinite;
}

.cmd-status__text {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.cmd-strip__progress {
  flex: 0 0 clamp(80px, 18vw, 220px);
  height: 2px;
  margin-left: auto;
  border-radius: 2px;
  background: rgba(140, 244, 231, 0.14);
  overflow: hidden;
}

.cmd-strip__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  transition: width 0.12s linear;
}

@keyframes man-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 3px rgba(40, 224, 200, 0.16); }
  50% { opacity: 0.45; box-shadow: 0 0 0 8px rgba(40, 224, 200, 0.03); }
}

/* 滚动收窄态 */
.cmdbar[data-condensed] .cmdbar__inner { padding-top: 7px; }
.cmdbar[data-condensed] .brand__mark { width: 30px; height: 30px; font-size: 11px; }
.cmdbar[data-condensed] .brand__sub { display: none; }
.cmdbar[data-condensed] .cmd-index__link { padding: 5px 2px; }
.cmdbar[data-condensed] .cmd-strip { padding: 4px 0 5px; }

/* ==========================================================================
   档案式页脚
   ========================================================================== */
.site-footer {
  margin-top: clamp(56px, 8vw, 110px);
  padding: clamp(40px, 5vw, 64px) 0 24px;
  background: linear-gradient(180deg, var(--ink-2), var(--ink) 62%);
  border-top: 1px solid var(--line-dark);
}

.footer__inner {
  display: grid;
  grid-template-columns: minmax(230px, 1.15fr) minmax(0, 1.7fr) minmax(230px, 1.2fr);
  gap: 40px 40px;
  align-items: start;
}

.footer__mark {
  margin: 0;
  color: var(--cream);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.footer__owner {
  margin: 6px 0 0;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
}

.footer__note {
  margin: 14px 0 0;
  max-width: 34ch;
  color: var(--slate);
  font-size: var(--fs-sm);
  line-height: 1.75;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 24px;
}

.footer-col__title,
.footer__contact-title {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-dark-soft);
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
}

.footer-links {
  display: grid;
  gap: 10px;
  list-style: none;
}

.footer-links a {
  display: inline-block;
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  color: rgba(253, 251, 247, 0.88);
  font-size: 15px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: rgba(40, 224, 200, 0.5);
}

.footer__contact-line {
  margin: 0 0 7px;
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  word-break: break-word;
}

.footer__contact-note {
  margin: 12px 0 0;
  max-width: 40ch;
  color: var(--slate);
  font-size: 13px;
  line-height: 1.7;
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--line-dark-soft);
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
}

.footer__legal,
.footer__copy,
.footer__region { margin: 0; }

.footer__legal { color: var(--amber); }

.footer__region { margin-left: auto; }

/* ==========================================================================
   基础组件（页面阶段复用）
   ========================================================================== */
.section {
  padding-block: clamp(48px, 7vw, 96px);
  border-top: 1px solid var(--line-dark);
}

.section:first-child { border-top: 0; }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 18px;
  margin-bottom: 28px;
}

.section__num {
  padding: 4px 9px;
  border: 1px solid rgba(40, 224, 200, 0.45);
  border-radius: var(--radius);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
}

.section__title {
  margin: 0;
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  font-weight: 900;
}

.section__note {
  margin: 0 0 0 auto;
  color: var(--slate);
  font-size: var(--fs-sm);
}

.grid {
  display: grid;
  gap: clamp(20px, 2.6vw, 32px);
}

.grid--split {
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  align-items: start;
}

.grid--cards {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  padding: clamp(18px, 2vw, 26px);
  border: 1px solid var(--paper-2);
  border-radius: var(--radius-lg);
  background: var(--paper);
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0));
  color: var(--ink-text);
  box-shadow: var(--shadow-card);
}

.card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 12px;
}

.card__title {
  margin: 0;
  font-size: var(--fs-md);
  font-weight: 900;
}

.card__meta {
  margin: 0;
  color: rgba(20, 32, 46, 0.62);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
  color: var(--ink-text);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.tag::before {
  content: "";
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--slate);
}

.tag--cyan::before { background: var(--cyan); }
.tag--amber::before { background: var(--amber); }
.tag--prism::before { background: var(--prism); }
.tag--paper::before { background: var(--paper-2); }
.tag--slate::before { background: var(--slate); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: rgba(124, 147, 170, 0.55);
}

.breadcrumb__link {
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  color: var(--slate);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: rgba(40, 224, 200, 0.4);
}

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

/* 图片容器 */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--ink-2), var(--ink-3));
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(120% 90% at 14% 8%, rgba(40, 224, 200, 0.16), transparent 62%);
}

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

.media-frame--empty::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(140, 244, 231, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 244, 231, 0.07) 1px, transparent 1px);
  background-size: 32px 32px;
}

.media-caption {
  margin: 10px 0 0;
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.03em;
}

/* 滚动显现 */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1240px) {
  .cmd-index__num { display: none; }
  .cmd-index__list { gap: 2px 12px; }
}

@media (max-width: 1040px) {
  .cmdbar__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand actions"
      "nav nav"
      "strip strip";
    gap: 6px 12px;
    padding: 10px 0 0;
  }

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

  .cmd-index {
    display: none;
    padding: 6px 0 4px;
    border-top: 1px solid var(--line-dark-soft);
  }

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

  .cmd-index__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
  }

  .cmd-index__item { border-bottom: 1px solid var(--line-dark-soft); }

  .cmd-index__item:last-child { border-bottom: 0; }

  .cmd-index__link {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 2px;
    font-size: 14px;
  }

  .cmd-index__num { display: inline; font-size: 11px; }

  .cmd-strip { padding-bottom: 6px; }

  .cmd-status__text { font-size: 11px; }

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

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

  .footer__brand { grid-column: 1 / -1; }

  .footer__region { margin-left: 0; }
}

@media (max-width: 860px) {
  .cmdbar__inner,
  .footer__inner,
  .footer__base,
  .shell { width: min(1440px, 100% - 32px); }

  .section__note { margin-left: 0; }
}

@media (max-width: 720px) {
  .footer__inner { grid-template-columns: minmax(0, 1fr); }
  .footer__cols { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .footer__contact-note,
  .footer__note { max-width: none; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }

  .cmd-actions .btn--primary { display: none; }

  .cmd-status__text { white-space: normal; }

  .cmd-strip__progress { flex-basis: 72px; }

  .brand__name { font-size: 15px; }

  .media-frame { border-radius: var(--radius); }
}

/* ==========================================================================
   动效降级
   ========================================================================== */
@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;
  }

  .cmd-status__dot { animation: none; opacity: 1; box-shadow: 0 0 0 3px rgba(40, 224, 200, 0.16); }

  .reveal,
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}