/* ==========================================================================
   新银河数据舱 · 全站共享样式  /assets/site.css
   深空蓝黑底 + 银河银文字 + 荧光青强调的悬浮胶囊体系
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--silver);
  background-color: var(--void);
  background-image:
    radial-gradient(1180px 620px at 80% -10%, rgba(122, 92, 255, 0.20), transparent 62%),
    radial-gradient(920px 520px at 4% 10%, rgba(22, 240, 220, 0.11), transparent 60%),
    linear-gradient(180deg, #050A18 0%, #071026 46%, #050A18 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 800; }
p { margin: 0; }
figure { margin: 0; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩体系 */
  --void: #050A18;
  --hull: #0B1530;
  --hull-soft: #101E42;
  --glass: rgba(232, 238, 249, 0.06);
  --glass-strong: rgba(232, 238, 249, 0.11);
  --line: rgba(232, 238, 249, 0.14);
  --line-strong: rgba(232, 238, 249, 0.28);

  --silver: #E8EEF9;
  --dust: #93A2C0;
  --body-ink: #C9D5EC;

  --cyan: #16F0DC;
  --violet: #7A5CFF;
  --pulse: #FF6B4A;
  --turf: #0F3A2E;
  --tag-blue: #2E86FF;
  --tag-gold: #F2C230;
  --ink: #04121A;

  /* 字体 */
  --font-display: "Noto Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  /* 尺寸与节奏 */
  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 48px);
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-pill: 999px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --shadow-lift: 0 22px 50px rgba(0, 0, 0, 0.45);
}

/* ---------- 3. 中文排版与焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

::selection {
  background: rgba(22, 240, 220, 0.28);
  color: var(--silver);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 50%;
  z-index: 999;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 0 0 var(--r-md) var(--r-md);
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: top 0.22s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 4. 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(56px, 7.5vw, 112px); }
.section--tight { padding-block: clamp(32px, 4vw, 64px); }
.section--flush-top { padding-top: 0; }

.breath { height: clamp(80px, 11vw, 172px); }

.rule-diagonal {
  position: relative;
  height: 1px;
  margin-block: clamp(40px, 6vw, 84px);
  background: linear-gradient(90deg, transparent, var(--line) 16%, rgba(22, 240, 220, 0.5) 50%, var(--line) 84%, transparent);
  transform: rotate(-0.8deg);
  transform-origin: left center;
}

.beam {
  position: absolute;
  inset-inline: -10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(22, 240, 220, 0.6), rgba(122, 92, 255, 0.5), transparent);
  transform: rotate(-8deg);
  transform-origin: left center;
  pointer-events: none;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.grid-12 > [data-span="3"] { grid-column: span 3; }
.grid-12 > [data-span="4"] { grid-column: span 4; }
.grid-12 > [data-span="5"] { grid-column: span 5; }
.grid-12 > [data-span="6"] { grid-column: span 6; }
.grid-12 > [data-span="7"] { grid-column: span 7; }
.grid-12 > [data-span="8"] { grid-column: span 8; }
.grid-12 > [data-span="12"] { grid-column: 1 / -1; }

/* ---------- 5. 页头：悬浮胶囊导航 ---------- */
.site-header {
  position: fixed;
  top: 24px;
  left: 0;
  right: 0;
  z-index: 120;
  padding-inline: var(--gutter);
  transition: top 0.32s var(--ease);
}
.site-header[data-scrolled="true"] { top: 10px; }

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 24px);
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 10px 12px 10px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: linear-gradient(120deg, rgba(11, 21, 48, 0.86), rgba(5, 10, 24, 0.74));
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(232, 238, 249, 0.09);
  transition: padding 0.32s var(--ease), box-shadow 0.32s var(--ease), background 0.32s var(--ease);
}
.site-header[data-scrolled="true"] .header-shell {
  padding: 6px 10px 6px 18px;
  background: linear-gradient(120deg, rgba(8, 16, 38, 0.95), rgba(5, 10, 24, 0.92));
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(232, 238, 249, 0.1);
}

.brand {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  text-decoration: none;
}
.brand-mark {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: clamp(15px, 1.3vw, 17px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--silver);
  white-space: nowrap;
}
.brand-orbit {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 14px rgba(22, 240, 220, 0.75), inset 0 0 6px rgba(22, 240, 220, 0.6);
}
.brand-tag {
  font-size: 10.5px;
  line-height: 1.2;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dust);
  white-space: nowrap;
}

.site-nav {
  display: flex;
  margin-left: clamp(6px, 1.4vw, 26px);
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-item { display: block; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 13px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--dust);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.nav-link:hover { color: var(--silver); background: var(--glass); }
.nav-link:active { color: var(--cyan); background: rgba(22, 240, 220, 0.1); }
.nav-link[aria-current="page"] { color: var(--silver); background: var(--glass); }
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 7px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  box-shadow: 0 0 10px rgba(22, 240, 220, 0.75);
}
.nav-link[aria-disabled="true"] {
  color: rgba(147, 162, 192, 0.45);
  pointer-events: none;
}

.header-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* ---------- 6. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.22s var(--ease), background-color 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--cyan);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(22, 240, 220, 0.22), 0 0 0 1px rgba(22, 240, 220, 0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 38px rgba(22, 240, 220, 0.32), 0 0 0 1px rgba(22, 240, 220, 0.62);
}

.btn-ghost {
  color: var(--silver);
  border-color: var(--line);
  background: var(--glass);
}
.btn-ghost:hover {
  color: var(--cyan);
  border-color: rgba(22, 240, 220, 0.55);
  background: rgba(22, 240, 220, 0.08);
  transform: translateY(-2px);
}

.btn-quiet { color: var(--dust); background: transparent; }
.btn-quiet:hover { color: var(--silver); background: var(--glass); }

.btn[disabled],
.btn[aria-disabled="true"] { opacity: 0.42; pointer-events: none; }

/* ---------- 7. 移动端汉堡 ---------- */
.nav-toggle {
  position: relative;
  display: none;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--glass);
  cursor: pointer;
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}
.nav-toggle:hover { border-color: rgba(22, 240, 220, 0.55); background: rgba(22, 240, 220, 0.08); }

.nav-toggle-bar {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--silver);
  transition: transform 0.28s var(--ease), opacity 0.18s var(--ease);
}
.nav-toggle-bar:nth-child(1) { transform: translate(-50%, -7px); }
.nav-toggle-bar:nth-child(2) { transform: translate(-50%, -1px); }
.nav-toggle-bar:nth-child(3) { transform: translate(-50%, 5px); }

.nav-toggle[aria-expanded="true"] { border-color: rgba(22, 240, 220, 0.6); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translate(-50%, -1px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; transform: translate(-50%, -1px) scaleX(0.4); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translate(-50%, -1px) rotate(-45deg); }

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  overflow: hidden;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(900px 340px at 10% 0%, rgba(15, 58, 46, 0.6), transparent 68%),
    linear-gradient(180deg, rgba(11, 21, 48, 0.78), rgba(5, 10, 24, 0.98) 54%);
  color: var(--silver);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(54%, 580px);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 62%, transparent);
  box-shadow: 0 0 18px rgba(22, 240, 220, 0.55);
  pointer-events: none;
}
.site-footer::after {
  content: "";
  position: absolute;
  top: 46px;
  right: -6%;
  width: 40%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(122, 92, 255, 0.55));
  transform: rotate(-8deg);
  transform-origin: right center;
  pointer-events: none;
}

.footer-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1.5fr) minmax(0, 1.05fr);
  gap: clamp(28px, 3.6vw, 60px);
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(48px, 6vw, 88px) var(--gutter);
}

.footer-brand .brand { margin-bottom: 18px; }
.footer-note {
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--dust);
}
.footer-note + .footer-note { margin-top: 10px; }
.footer-note--muted {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(147, 162, 192, 0.7);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 32px);
}

.footer-col-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
}
.footer-col-title::before {
  content: "";
  flex: 0 0 auto;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(22, 240, 220, 0.8);
  transform: rotate(45deg);
}

.footer-links li + li { margin-top: 10px; }
.footer-links a {
  display: inline-block;
  font-size: 14.5px;
  color: var(--dust);
  text-decoration: none;
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}
.footer-links a:hover { color: var(--cyan); transform: translateX(3px); }
.footer-links a[aria-current="page"] { color: var(--cyan); }

.contact-list { margin-bottom: 4px; }
.contact-item { display: flex; flex-direction: column; gap: 2px; }
.contact-item + .contact-item { margin-top: 14px; }
.contact-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(147, 162, 192, 0.78);
}
.contact-value {
  font-size: 14.5px;
  color: var(--silver);
  word-break: break-word;
}
.contact-note {
  max-width: 32em;
  margin-top: 18px;
  padding-left: 12px;
  border-left: 2px solid rgba(22, 240, 220, 0.35);
  font-size: 12.5px;
  line-height: 1.72;
  color: rgba(147, 162, 192, 0.72);
}

.footer-base {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  background: rgba(3, 7, 17, 0.72);
}
.footer-base-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 18px var(--gutter);
  font-size: 13px;
  color: var(--dust);
}
.footer-copy,
.footer-icp { margin: 0; }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a {
  color: var(--dust);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.footer-legal a:hover { color: var(--cyan); }

/* ---------- 9. 内容组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.section-head { margin-bottom: clamp(24px, 3vw, 44px); }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 46px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--silver);
}
.section-lead {
  max-width: 38em;
  margin-top: 16px;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--dust);
}

.prose {
  max-width: 36em;
  color: var(--body-ink);
  font-size: 17px;
  line-height: 1.78;
}
.prose p { margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose h2,
.prose h3 {
  margin: 1.6em 0 0.6em;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--silver);
}
.prose h2 { font-size: clamp(22px, 2.4vw, 30px); }
.prose h3 { font-size: clamp(18px, 1.8vw, 22px); }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }
.prose ul,
.prose ol { margin: 0 0 1.1em; padding-left: 1.3em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.4em; }
.prose strong { color: var(--silver); font-weight: 700; }

.lead {
  font-size: clamp(17px, 1.5vw, 19px);
  line-height: 1.8;
  color: var(--body-ink);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

.card {
  position: relative;
  padding: clamp(18px, 2vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, rgba(232, 238, 249, 0.06), rgba(232, 238, 249, 0.02));
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(22, 240, 220, 0.42);
  box-shadow: var(--shadow-lift);
}
.card-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--silver);
}
.card-note {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--dust);
}

.stat { display: block; }
.stat-value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}
.stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dust);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--glass);
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--dust);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.chip:hover { color: var(--silver); border-color: var(--line-strong); }
.chip[aria-pressed="true"],
.chip.is-active {
  color: var(--cyan);
  border-color: rgba(22, 240, 220, 0.55);
  background: rgba(22, 240, 220, 0.1);
}
.chip[aria-disabled="true"] { opacity: 0.4; pointer-events: none; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 24px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--glass);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--dust);
  white-space: nowrap;
}
.tag--cyan { color: var(--cyan); border-color: rgba(22, 240, 220, 0.4); background: rgba(22, 240, 220, 0.08); }
.tag--pulse { color: var(--pulse); border-color: rgba(255, 107, 74, 0.42); background: rgba(255, 107, 74, 0.09); }
.tag--gold { color: var(--tag-gold); border-color: rgba(242, 194, 48, 0.42); background: rgba(242, 194, 48, 0.09); }
.tag--blue { color: var(--tag-blue); border-color: rgba(46, 134, 255, 0.42); background: rgba(46, 134, 255, 0.09); }
.tag--turf { color: #7FD8B4; border-color: rgba(15, 58, 46, 0.9); background: rgba(15, 58, 46, 0.7); }

/* ---------- 10. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, #0B1530, #050A18);
  aspect-ratio: 16 / 9;
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 10, 24, 0) 42%, rgba(5, 10, 24, 0.74) 100%);
  pointer-events: none;
}
.media-frame[data-ratio="21/9"] { aspect-ratio: 21 / 9; }
.media-frame[data-ratio="3/2"] { aspect-ratio: 3 / 2; }
.media-frame[data-ratio="4/3"] { aspect-ratio: 4 / 3; }
.media-frame[data-ratio="1/1"] { aspect-ratio: 1 / 1; }

.media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(147, 162, 192, 0.78);
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumbs { padding-block: 6px 0; }
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--dust);
}
.crumb-item { color: var(--dust); text-decoration: none; transition: color 0.2s var(--ease); }
.crumb-item:hover { color: var(--cyan); }
.crumb-item[aria-current="page"] { color: var(--silver); }
.crumb-sep { color: rgba(147, 162, 192, 0.45); }

/* ---------- 12. 滚动进度与显现 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 2px;
  background: rgba(232, 238, 249, 0.08);
  pointer-events: none;
}
.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  box-shadow: 0 0 14px rgba(22, 240, 220, 0.6);
  will-change: transform;
}

html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.28s var(--ease), transform 0.28s var(--ease);
}
html[data-js="on"] [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 13. 主体安全区 ---------- */
#main-content {
  display: block;
  padding-top: clamp(112px, 12vw, 148px);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1180px) {
  .nav-link { padding: 0 10px; font-size: 13.5px; }
}

@media (max-width: 1080px) {
  .site-header { top: 14px; }
  .brand-tag { display: none; }

  .nav-toggle { display: block; }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: block;
    margin-left: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    background: linear-gradient(165deg, rgba(11, 21, 48, 0.97), rgba(5, 10, 24, 0.97));
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    backdrop-filter: blur(20px) saturate(150%);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.24s var(--ease), transform 0.24s var(--ease), visibility 0.24s linear;
  }
  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .nav-link {
    height: 46px;
    justify-content: flex-start;
    padding: 0 16px;
    border-radius: var(--r-md);
    font-size: 15.5px;
  }
  .nav-link[aria-current="page"] { color: var(--cyan); background: rgba(22, 240, 220, 0.1); }
  .nav-link[aria-current="page"]::after { display: none; }
}

@media (max-width: 1060px) {
  .footer-shell { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid-12 > [data-span] { grid-column: span 6; }
  .grid-12 > [data-span="3"],
  .grid-12 > [data-span="4"] { grid-column: span 3; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .btn-ghost { display: none; }
  .header-shell { gap: 8px; padding: 8px 8px 8px 16px; }
  .btn-primary { min-height: 38px; padding: 0 14px; font-size: 13px; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .footer-shell { grid-template-columns: minmax(0, 1fr); }
  .footer-base-inner { justify-content: flex-start; }
  .footer-legal { width: 100%; gap: 16px; }
}

@media (max-width: 560px) {
  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .grid-12 > [data-span] { grid-column: auto; }
  .brand-mark { font-size: 13.5px; }
  .brand-orbit { width: 9px; height: 9px; border-width: 2px; }
  .btn-primary { padding: 0 12px; font-size: 12.5px; }
  .nav-toggle { width: 40px; height: 40px; }
}

/* ---------- 15. 降低动效偏好 ---------- */
@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;
    scroll-behavior: auto !important;
  }

  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .site-header,
  .header-shell { transition: none; }
}