/* =========================================================
   黄软速载 共享样式 /assets/site.css
   技术蓝图 · 霓虹网格 · 密集信息系统
   ========================================================= */

/* ---------- 1. Reset & Tokens ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-base: #1a1a2e;
  --bg-panel: #2b2b3a;
  --bg-lift: #33334a;
  --bg-soft: #f5f5dc;
  --ink: #e0e0e0;
  --ink-dim: #9a9ab0;
  --ink-on-color: #1a1a2e;
  --line: #3a3a50;
  --line-bright: #5a5a70;
  --accent-key: #ffd700;
  --zone-purple: #6a0dad;
  --zone-green: #39ff14;
  --zone-orange: #ff4500;
  --zone-blue: #00bfff;
  --status-success: #00ff7f;
  --status-warning: #ffa500;
  --status-error: #ff00ff;
  --font-display: Impact, "Arial Black", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-body: "Microsoft YaHei", "Source Han Sans CN", "PingFang SC", "Helvetica Neue", sans-serif;
  --font-mono: Consolas, "Courier New", "SFMono-Regular", monospace;
  --container: 1240px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --radius: 0px;
  --transition: 0.25s ease;
}

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

body {
  background: var(--bg-base);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

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

:focus-visible {
  outline: 2px solid var(--accent-key);
  outline-offset: 3px;
}

::selection {
  background: var(--accent-key);
  color: var(--ink-on-color);
}

/* ---------- 2. Accessibility Utilities ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -64px;
  left: 16px;
  z-index: 400;
  background: var(--accent-key);
  color: var(--ink-on-color);
  padding: 10px 18px;
  font-weight: 700;
  font-family: var(--font-body);
  transition: top 0.2s ease;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}

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

/* ---------- 3. Scroll Progress ---------- */
.term-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  z-index: 300;
  background: linear-gradient(90deg, var(--zone-purple), var(--zone-green), var(--accent-key), var(--zone-blue));
  pointer-events: none;
  transition: width 0.1s linear;
}

/* ---------- 4. Header ---------- */
.site-header {
  position: relative;
  z-index: 50;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, #131322 0%, #1a1a2e 100%);
  background-size: 28px 28px, 28px 28px, 100% 100%;
  border-bottom: 2px solid var(--line);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--zone-purple), var(--zone-green), var(--zone-orange), var(--zone-blue));
  opacity: 0.6;
  pointer-events: none;
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3) var(--space-3);
}

.header-coords {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-bottom: 1px dashed var(--line);
  padding-bottom: 6px;
  margin-bottom: var(--space-2);
}

.coord-cell {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  line-height: 1.4;
}

.coord-cell::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent-key);
  box-shadow: 0 0 8px var(--accent-key);
  flex-shrink: 0;
}

.nav-dock {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  background: rgba(43, 43, 58, 0.92);
  border: 1px solid var(--line);
  padding: 10px 18px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  display: block;
  width: 40px;
  height: 40px;
  position: relative;
  background:
    linear-gradient(135deg, var(--zone-green) 0 22%, transparent 22% 42%, var(--accent-key) 42% 62%, transparent 62% 72%, var(--zone-blue) 72%);
  border: 2px solid rgba(255, 255, 255, 0.72);
  flex-shrink: 0;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 2px;
  background:
    linear-gradient(90deg, rgba(26, 26, 46, 0.55) 1px, transparent 1px);
  background-size: 8px 8px;
}

.brand-text {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--accent-key);
  text-transform: uppercase;
  white-space: nowrap;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav-link {
  display: block;
  padding: 10px 15px;
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--ink);
  border: 1px solid transparent;
  transition:
    color var(--transition),
    background var(--transition),
    border-color var(--transition);
  white-space: nowrap;
}

.site-nav-link:hover {
  color: var(--accent-key);
  border-color: var(--line);
  background: rgba(57, 255, 20, 0.06);
}

.site-nav-link[aria-current="page"] {
  background: var(--accent-key);
  border-color: var(--accent-key);
  color: var(--ink-on-color);
  font-weight: 700;
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.18);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line-bright);
  padding: 10px;
  line-height: 0;
  flex-shrink: 0;
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--accent-key);
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 5. Footer ---------- */
.site-footer {
  margin-top: var(--space-5);
  position: relative;
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(150deg, #1a1430 0%, #1a1a2e 55%, #0d1c2f 100%);
  background-size: 32px 32px, 32px 32px, 100% 100%;
  border-top: 4px solid transparent;
  border-image: linear-gradient(90deg, var(--zone-purple), var(--zone-green), var(--zone-orange), var(--zone-blue)) 1;
}

.footer-grid {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 2fr;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-3);
}

.footer-brand-col {
  background: var(--zone-purple);
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: var(--space-3);
  align-self: start;
  box-shadow: 0 8px 20px rgba(106, 13, 173, 0.3);
}

.footer-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.footer-brand-col .brand-text {
  color: #ffffff;
  -webkit-text-stroke: 1px var(--accent-key);
}

.footer-role {
  margin-top: var(--space-2);
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: #e2c2ff;
}

.footer-links-col,
.footer-contact-col {
  padding-top: var(--space-1);
}

.footer-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-key);
  margin-bottom: var(--space-2);
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.footer-links li,
.footer-contact-list li {
  padding: 5px 0;
  font-size: 14px;
}

.footer-links a {
  color: var(--ink);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent-key);
  padding-left: 4px;
}

.footer-contact-list li {
  color: var(--ink-dim);
  line-height: 1.8;
}

.footer-legal {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  padding: var(--space-3) var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  border-top: 1px solid var(--line);
}

/* ---------- 6. Shared Layout Components ---------- */
.page-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-3) var(--space-3) var(--space-4);
  position: relative;
  z-index: 1;
}

.section-band {
  padding: var(--space-4) var(--space-3);
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
}

.section-band.zone-purple { background: var(--zone-purple); color: #ffffff; }
.section-band.zone-green { background: var(--zone-green); color: var(--ink-on-color); }
.section-band.zone-orange { background: var(--zone-orange); color: var(--ink-on-color); }
.section-band.zone-blue { background: var(--zone-blue); color: var(--ink-on-color); }
.section-band.zone-soft { background: var(--bg-soft); color: #1a1a2e; }

.hero-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-panel);
  border-left: 6px solid var(--accent-key);
  border-right: 1px solid var(--line);
  margin-bottom: var(--space-3);
}

.hero-strip h1,
.hero-strip .hero-title {
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 34px);
  letter-spacing: 0.04em;
  color: var(--ink);
  margin: 0;
}

.hero-strip .hero-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  white-space: nowrap;
  text-transform: uppercase;
}

.sec-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-key);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-3);
}

.tile-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

/* ---------- 7. Cards & Tiles ---------- */
.data-card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  padding: var(--space-3);
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.data-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 18px;
  height: 18px;
  border-top: 2px solid var(--accent-key);
  border-right: 2px solid var(--accent-key);
  pointer-events: none;
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-key);
  box-shadow: 0 10px 0 rgba(57, 255, 20, 0.08);
}

.function-tile {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 2px solid var(--line);
  background: var(--bg-panel);
  color: var(--ink);
  min-height: 140px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.function-tile:hover {
  transform: scale(1.02);
  border-color: var(--accent-key);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
}

.function-tile.zone-purple { background: var(--zone-purple); border-color: var(--zone-purple); color: #ffffff; }
.function-tile.zone-green { background: var(--zone-green); border-color: var(--zone-green); color: var(--ink-on-color); }
.function-tile.zone-orange { background: var(--zone-orange); border-color: var(--zone-orange); color: var(--ink-on-color); }
.function-tile.zone-blue { background: var(--zone-blue); border-color: var(--zone-blue); color: var(--ink-on-color); }

/* ---------- 8. Entry List / Index ---------- */
.entry-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.entry-row {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  align-items: center;
  gap: var(--space-2);
  padding: 12px 8px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}

.entry-row:hover {
  background: rgba(255, 255, 255, 0.03);
}

.entry-row > .id-marker {
  justify-self: start;
}

.id-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  padding: 0 8px;
  background: var(--accent-key);
  color: var(--ink-on-color);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.index-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-panel);
  border-left: 4px solid var(--accent-key);
  border-right: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
}

.index-strip[data-zone="purple"] { border-left-color: var(--zone-purple); }
.index-strip[data-zone="green"] { border-left-color: var(--zone-green); }
.index-strip[data-zone="orange"] { border-left-color: var(--zone-orange); }
.index-strip[data-zone="blue"] { border-left-color: var(--zone-blue); }

.rail-wrap {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-panel);
}

.rail-track {
  display: flex;
  gap: var(--space-2);
  min-width: max-content;
  padding: var(--space-2);
}

.rail-track > * {
  scroll-snap-align: start;
}

/* ---------- 9. Tags & Badges ---------- */
.tag-set {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1px solid var(--line-bright);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
}

.tag-item[data-tag="v3"] { border-color: var(--zone-green); color: var(--zone-green); }
.tag-item[data-tag="v2"] { border-color: var(--zone-blue); color: var(--zone-blue); }
.tag-item[data-tag="android"] { border-color: var(--zone-green); color: var(--zone-green); }
.tag-item[data-tag="ios"] { border-color: var(--zone-blue); color: var(--zone-blue); }
.tag-item[data-tag="pc"] { border-color: var(--zone-purple); color: #c594ff; }
.tag-item[data-tag="fix"] { border-color: var(--accent-key); color: var(--accent-key); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  border: 1px solid transparent;
  white-space: nowrap;
}

.badge-success { background: var(--status-success); color: var(--ink-on-color); }
.badge-warning { background: var(--status-warning); color: var(--ink-on-color); }
.badge-error { background: var(--status-error); color: #ffffff; }
.badge-key { background: var(--accent-key); color: var(--ink-on-color); }
.badge-neutral { background: var(--bg-lift); border-color: var(--line); color: var(--ink); }

/* ---------- 10. Data Visualization ---------- */
.meter-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-lift);
  overflow: hidden;
}

.meter-bar > span {
  display: block;
  height: 100%;
  background: var(--accent-key);
}

.meter-bar[data-meter="green"] > span { background: var(--zone-green); }
.meter-bar[data-meter="blue"] > span { background: var(--zone-blue); }
.meter-bar[data-meter="orange"] > span { background: var(--zone-orange); }
.meter-bar[data-meter="purple"] > span { background: var(--zone-purple); }

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.spec-table th,
.spec-table td {
  padding: 10px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  background: var(--bg-lift);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-key);
}

.spec-table tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

/* ---------- 11. Step Flow & Filter ---------- */
.step-flow {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  counter-reset: step;
}

.step-item {
  counter-increment: step;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-2);
  align-items: start;
  padding: var(--space-2);
  background: var(--bg-panel);
  border: 1px solid var(--line);
}

.step-item::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-key);
  line-height: 1.4;
}

.filter-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.filter-panel .tag-item {
  border-color: var(--line-bright);
  color: var(--ink);
  padding: 6px 14px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.filter-panel .tag-item[aria-pressed="true"] {
  background: var(--accent-key);
  border-color: var(--accent-key);
  color: var(--ink-on-color);
  font-weight: 700;
}

/* ---------- 12. Reveal Motion ---------- */
.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease;
  transition-delay: var(--reveal-delay, 0s);
}

.js-enabled [data-reveal][data-revealed] {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 13. Responsive ---------- */
@media (max-width: 1080px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .tile-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 880px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 12px;
    right: 12px;
    display: none;
    background: var(--bg-panel);
    border: 1px solid var(--line-bright);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.5);
    z-index: 120;
  }

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

  .site-nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
  }

  .site-nav-link {
    padding: 14px 16px;
    border-bottom: 1px dashed var(--line);
    white-space: normal;
  }

  .site-nav-link[aria-current="page"] {
    box-shadow: none;
  }
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .compare-grid {
    grid-template-columns: 1fr;
  }

  .hero-strip {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-strip .hero-meta {
    white-space: normal;
  }

  .entry-row {
    grid-template-columns: 40px 1fr;
  }

  .entry-row .badge {
    grid-column: 2;
    justify-self: start;
  }
}

@media (max-width: 560px) {
  .header-inner {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
  }

  .nav-dock {
    padding: 8px 12px;
  }

  .header-coords {
    justify-content: flex-start;
    font-size: 10px;
  }

  .tile-matrix {
    grid-template-columns: 1fr;
  }

  .footer-legal {
    flex-direction: column;
    gap: 6px;
  }

  .brand-text {
    font-size: 19px;
  }
}

/* ---------- 14. Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  .term-progress {
    display: none;
  }

  .js-enabled [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .js-enabled [data-reveal][data-revealed] {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 15. Print ---------- */
@media print {
  .site-header,
  .site-footer,
  .term-progress,
  .skip-link {
    display: none !important;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .page-container,
  .section-band {
    padding: 0;
  }
}