/* ==========================================================================
   1号站娱乐 · 赛博娱乐数据舱 — /assets/site.css
   共享外壳：reset / 设计变量 / 中文排版 / 头部 / 页脚 / 基础组件 / 响应式
   ========================================================================== */

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

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

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

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

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

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

a { color: inherit; }

/* ---------- 设计变量 ---------- */
:root {
  --ink: #05060A;
  --panel: #0B1020;
  --blue: #2F6BFF;
  --violet: #8B5CF6;
  --amber: #F5A524;
  --cyan: #22D3EE;
  --text: #E5E7EB;
  --muted: #A3AED0;
  --coral: #F97066;
  --line: #1E3A8A;

  --line-soft: rgba(47, 107, 255, .26);
  --line-hair: rgba(163, 174, 208, .18);
  --glass: rgba(11, 16, 32, .74);

  --shell-w: 1320px;
  --radius-s: 8px;
  --radius: 14px;
  --radius-l: 22px;

  --font-display: "Space Grotesk", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-data: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  --shadow-card: 0 20px 44px -28px rgba(0, 0, 0, .95);
  --shadow-glow: 0 0 30px -10px rgba(47, 107, 255, .65);
  --ease: cubic-bezier(.22, .7, .28, 1);
}

/* ---------- 基础与中文排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: .01em;
  word-break: break-word;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(1100px 620px at 84% -12%, rgba(139, 92, 246, .20), transparent 62%),
    radial-gradient(900px 520px at 4% 6%, rgba(47, 107, 255, .18), transparent 64%),
    radial-gradient(700px 500px at 50% 120%, rgba(34, 211, 238, .10), transparent 70%),
    var(--ink);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(47, 107, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 107, 255, .055) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(circle at 50% 18%, #000 38%, transparent 86%);
  mask-image: radial-gradient(circle at 50% 18%, #000 38%, transparent 86%);
}

main { position: relative; z-index: 1; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: rgba(47, 107, 255, .45); color: #fff; }

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: 14px;
  top: -80px;
  z-index: 120;
  padding: 11px 18px;
  border-radius: var(--radius-s);
  background: var(--amber);
  color: var(--ink);
  font-weight: 700;
  font-size: .9rem;
  text-decoration: none;
  transition: top .22s var(--ease);
}

.skip-link:focus { top: 14px; }

/* ---------- 页头：双层甲板 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(5, 6, 10, .96), rgba(5, 6, 10, .84));
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line-soft);
}

.header-deck { position: relative; }

.header-deck::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  opacity: .55;
  background: repeating-linear-gradient(90deg, rgba(47, 107, 255, .55) 0 2px, transparent 2px 14px);
  pointer-events: none;
}

.header-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(16px, 3vw, 30px);
  width: 100%;
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 14px clamp(16px, 3vw, 32px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  background: conic-gradient(from 210deg, var(--blue), var(--violet) 45%, var(--cyan) 74%, var(--blue));
  clip-path: polygon(50% 0, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
  box-shadow: 0 0 24px -6px rgba(47, 107, 255, .95);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  background: var(--ink);
  clip-path: inherit;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: .04em;
}

.brand-line {
  margin-top: 3px;
  font-family: var(--font-data);
  font-size: .66rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--muted);
}

.utility-strip {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-left: 24px;
  border-left: 1px dashed var(--line-hair);
}

.utility-item {
  position: relative;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.utility-item::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 50%;
  width: 4px;
  height: 4px;
  margin-top: -2px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.utility-item:first-child::before { display: none; }

.utility-link {
  color: var(--muted);
  text-decoration: none;
  transition: color .25s var(--ease);
}

.utility-link:hover { color: var(--cyan); }

.deck-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 18px;
  border-radius: 999px;
  color: #fff;
  font-size: .86rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  background: linear-gradient(120deg, var(--blue), var(--violet));
  box-shadow: 0 12px 30px -14px rgba(47, 107, 255, .95);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.header-cta::after {
  content: "→";
  font-family: var(--font-data);
  transition: transform .3s var(--ease);
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px -14px rgba(139, 92, 246, .95);
}

.header-cta:hover::after { transform: translateX(4px); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(11, 16, 32, .72);
  color: var(--text);
  cursor: pointer;
  font-family: var(--font-data);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

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

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform .3s var(--ease), opacity .25s var(--ease);
}

.nav-toggle[aria-expanded="true"] { border-color: var(--amber); color: var(--amber); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.nav-toggle-label { font-family: var(--font-data); }

.nav-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px);
  border-top: 1px solid rgba(30, 58, 138, .38);
}

.nav-rail {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.nav-item { flex: 0 0 auto; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 20px;
  color: var(--muted);
  font-size: .94rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color .25s var(--ease), background-color .25s var(--ease);
}

.nav-index {
  font-family: var(--font-data);
  font-size: .68rem;
  letter-spacing: .1em;
  color: rgba(163, 174, 208, .72);
  transition: color .25s var(--ease);
}

.nav-label { font-family: var(--font-body); }

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--blue), var(--cyan), var(--violet));
  transition: transform .3s var(--ease);
}

.nav-link:hover {
  color: var(--text);
  background: rgba(47, 107, 255, .09);
}

.nav-link:hover::after { transform: scaleX(.55); }

.nav-link[aria-current="page"] {
  color: #fff;
  background: linear-gradient(180deg, rgba(47, 107, 255, .22), rgba(47, 107, 255, 0));
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--amber);
  text-shadow: 0 0 12px rgba(245, 165, 36, .7);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  box-shadow: 0 0 14px rgba(34, 211, 238, .75);
}

.nav-hint {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: .67rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(163, 174, 208, .6);
  white-space: nowrap;
}

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(30, 58, 138, .42);
}

.scroll-meter-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--blue), var(--cyan) 45%, var(--violet) 80%, var(--amber));
  transition: transform .12s linear;
}

/* ---------- 页脚：三层数据舱铭牌 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(48px, 8vw, 110px);
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(11, 16, 32, 0) 0%, rgba(11, 16, 32, .88) 24%, rgba(5, 6, 10, .99) 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 2px;
  opacity: .72;
  background: linear-gradient(90deg, transparent, var(--blue), var(--cyan), var(--violet), transparent);
}

.footer-inner {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 74px) clamp(16px, 3vw, 32px) 28px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(230px, 1fr) minmax(0, 1.5fr) minmax(250px, 1.1fr);
  gap: clamp(24px, 4vw, 52px);
}

.footer-mark {
  display: block;
  width: 30px;
  height: 30px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--violet), var(--blue) 60%, var(--cyan));
  clip-path: polygon(50% 0, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
  box-shadow: 0 0 22px -6px rgba(139, 92, 246, .95);
}

.footer-brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.38rem;
  letter-spacing: .04em;
}

.footer-brand-line {
  margin-top: 8px;
  max-width: 30ch;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.7;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 18px;
}

.footer-meta li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-data);
  font-size: .73rem;
  letter-spacing: .08em;
}

.meta-key {
  padding: 2px 7px;
  border: 1px solid var(--line-hair);
  border-radius: 4px;
  color: var(--cyan);
  letter-spacing: .14em;
}

.meta-val { color: var(--muted); }

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

.footer-col {
  padding-left: 18px;
  border-left: 1px solid rgba(30, 58, 138, .42);
}

.footer-heading {
  margin-bottom: 14px;
  font-family: var(--font-data);
  font-size: .71rem;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

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

.footer-links a {
  position: relative;
  color: var(--text);
  font-size: .94rem;
  text-decoration: none;
  transition: color .25s var(--ease);
}

.footer-links a::before {
  content: "";
  position: absolute;
  left: -14px;
  top: .68em;
  width: 7px;
  height: 1px;
  opacity: 0;
  transform: translateX(-4px);
  background: var(--blue);
  transition: opacity .25s var(--ease), transform .25s var(--ease);
}

.footer-links a:hover { color: var(--cyan); }
.footer-links a:hover::before { opacity: 1; transform: translateX(0); }

.footer-contact {
  padding: clamp(16px, 2.2vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(47, 107, 255, .14), rgba(11, 16, 32, .92) 58%);
  box-shadow: var(--shadow-card);
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.contact-key {
  min-width: 40px;
  font-family: var(--font-data);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-val {
  font-family: var(--font-data);
  font-size: .87rem;
  color: var(--text);
  word-break: break-all;
}

.contact-row--wide { align-items: flex-start; }
.contact-row--wide .contact-val {
  font-family: var(--font-body);
  font-size: .9rem;
  line-height: 1.6;
  word-break: normal;
}

.copy-btn {
  margin-left: auto;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(5, 6, 10, .5);
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font-data);
  font-size: .66rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

.copy-btn:hover { border-color: var(--cyan); color: var(--cyan); }

.copy-btn[data-copied="true"] {
  border-color: var(--amber);
  color: var(--amber);
}

.contact-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-hair);
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: 20px;
  border-top: 1px solid rgba(30, 58, 138, .46);
  font-family: var(--font-data);
  font-size: .73rem;
  letter-spacing: .1em;
}

.footer-copy { color: var(--muted); }
.footer-icp { color: var(--muted); }
.footer-rail {
  color: rgba(163, 174, 208, .55);
  text-transform: uppercase;
}

/* ---------- 基础组件 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px);
}

.section {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
}

.section-head {
  display: grid;
  gap: 14px;
  max-width: 64ch;
}

.eyebrow {
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--cyan);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.4vw, 2.7rem);
  line-height: 1.16;
  letter-spacing: -.01em;
}

.lede {
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.85;
}

.chapter {
  display: grid;
  gap: clamp(12px, 2vw, 22px);
}

.chapter-index {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1;
  color: rgba(47, 107, 255, .22);
  -webkit-text-stroke: 1px rgba(47, 107, 255, .55);
}

.v-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-data);
  font-size: .7rem;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--muted);
}

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(47, 107, 255, .6), rgba(34, 211, 238, .22), transparent);
}

.print-label {
  display: inline-block;
  padding: 6px 12px;
  border: 1px dashed var(--line);
  border-radius: 4px;
  font-family: var(--font-data);
  font-size: .68rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); }

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(11, 16, 32, .94), rgba(5, 6, 10, .88));
  box-shadow: var(--shadow-card);
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}

.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(47, 107, 255, .68);
  box-shadow: 0 28px 50px -26px rgba(47, 107, 255, .6);
}

.card--float { border-radius: var(--radius-l); }

.data-value {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  line-height: 1.1;
  color: var(--text);
}

.data-value--amber {
  color: var(--amber);
  text-shadow: 0 0 22px rgba(245, 165, 36, .45);
}

.data-label {
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(47, 107, 255, .1);
  font-family: var(--font-data);
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.tag--violet { color: #C4B5FD; border-color: rgba(139, 92, 246, .5); background: rgba(139, 92, 246, .14); }
.tag--amber { color: var(--amber); border-color: rgba(245, 165, 36, .48); background: rgba(245, 165, 36, .12); }
.tag--cyan { color: var(--cyan); border-color: rgba(34, 211, 238, .46); background: rgba(34, 211, 238, .12); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(11, 16, 32, .84);
  color: var(--text);
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: transform .28s var(--ease), border-color .28s var(--ease), color .28s var(--ease), background-color .28s var(--ease);
}

.btn:hover { transform: translateY(-2px); border-color: var(--cyan); color: #fff; }

.btn--primary {
  border-color: transparent;
  background: linear-gradient(120deg, var(--blue), var(--violet));
  color: #fff;
  box-shadow: 0 14px 32px -16px rgba(47, 107, 255, .95);
}

.btn--primary:hover { box-shadow: 0 20px 40px -16px rgba(139, 92, 246, .95); }

.btn--amber {
  border-color: transparent;
  background: linear-gradient(120deg, var(--amber), #FF7A45);
  color: var(--ink);
  font-weight: 700;
}

.btn--ghost { background: transparent; }

.breadcrumbs {
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 10px; color: rgba(47, 107, 255, .6); }
.breadcrumbs [aria-current="page"] { color: var(--text); }

.timeline {
  border-left: 1px solid var(--line);
}

.timeline li {
  position: relative;
  padding: 0 0 26px 26px;
}

.timeline li:last-child { padding-bottom: 0; }

.timeline li::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: .55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(34, 211, 238, .8);
}

.accordion {
  margin: 0 0 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(11, 16, 32, .72);
  overflow: hidden;
}

.accordion summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.accordion summary::-webkit-details-marker { display: none; }

.accordion summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-data);
  color: var(--cyan);
  transition: transform .3s var(--ease);
}

.accordion[open] summary::after { content: "－"; transform: rotate(180deg); }

.accordion-body {
  padding: 0 20px 20px;
  color: var(--muted);
  line-height: 1.8;
}

.prose {
  max-width: 76ch;
  color: var(--text);
  line-height: 1.9;
}

.prose h2 {
  margin: 2em 0 .6em;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.2vw, 1.7rem);
  letter-spacing: .01em;
}

.prose h3 { margin: 1.6em 0 .5em; font-size: 1.08rem; }

.prose p { margin: 0 0 1.1em; }

.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.3em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.prose li { margin-bottom: .5em; }

.prose a { color: var(--cyan); text-underline-offset: 3px; }

/* ---------- 图片容器基础（页面阶段放占位图） ---------- */
.media-frame {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(140deg, rgba(47, 107, 255, .22), rgba(139, 92, 246, .14) 46%, rgba(5, 6, 10, 0) 72%),
    var(--panel);
  box-shadow: var(--shadow-card);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(34, 211, 238, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, .08) 1px, transparent 1px);
  background-size: 30px 30px;
}

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

.media-frame figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px 16px;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--muted);
  background: linear-gradient(180deg, transparent, rgba(5, 6, 10, .9));
}

.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }
.media-frame--tall { aspect-ratio: 9 / 16; }

/* ---------- 渐现协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-top { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    padding: 12px clamp(14px, 4vw, 22px);
  }

  .utility-strip { display: none; }

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

  .nav-hint { display: none; }

  .nav-shell {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 70;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-width: none;
    margin: 0;
    padding: 10px clamp(14px, 4vw, 22px) 22px;
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(5, 6, 10, .99), rgba(11, 16, 32, .99));
    box-shadow: 0 34px 60px -30px #000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s linear;
  }

  .nav-shell[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-rail { overflow: visible; }

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

  .nav-item { border-bottom: 1px solid rgba(30, 58, 138, .38); }

  .nav-link {
    width: 100%;
    padding: 15px 4px;
    font-size: 1rem;
  }

  .nav-link::after { left: 0; right: auto; width: 46px; }

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

@media (max-width: 700px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-bottom { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .header-cta { display: none; }
  .brand-line { letter-spacing: .1em; font-size: .6rem; }
}

@media (max-width: 460px) {
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
  .footer-col { padding-left: 0; border-left: 0; }
  .footer-links a::before { display: none; }
}

/* ---------- 动效与可访问性降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

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