/* =========================================================
   博澳体育APP · /assets/site.css
   共享样式：变量 / 重置 / 排版 / 容器 / 网格 / 按钮 /
   面包屑 / 头部 / 页脚 / 正文 / 图片 / 组件 / 动效
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  /* 色板 */
  --deep-navy: #0A1633;
  --deep-navy-2: #060D20;
  --light-slate: #E2E8F0;
  --orange: #F97316;
  --blue: #2563EB;
  --cyan: #22D3EE;
  --slate-800: #1E293B;
  --white: #FFFFFF;
  --gray-100: #F1F5F9;
  --amber: #FCD34D;

  /* 字体 */
  --font-headline: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;

  /* 结构 */
  --content-max: 1200px;
  --content-pad: clamp(1rem, 4vw, 2.5rem);
  --header-h: 76px;
  --header-ribbon-h: 34px;
  --radius-md: 12px;
  --radius-sm: 8px;

  /* 材质 */
  --ink-line: 1px solid rgba(10, 22, 51, 0.14);
  --navy-grid-bg:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  --shadow-card: 0 4px 18px rgba(10, 22, 51, 0.06);
  --shadow-lift: 0 10px 30px rgba(10, 22, 51, 0.12);
}

/* ---------- 2. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}
body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--light-slate);
  color: var(--slate-800);
  font-family: var(--font-body);
  font-size: clamp(1rem, 1rem + 0.15vw, 1.125rem);
  line-height: 1.8;
}
h1, h2, h3, h4, h5, h6, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
img, video, svg { display: block; max-width: 100%; height: auto; }
#main-content { scroll-margin-top: calc(var(--header-h) + 12px); }

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 800;
  line-height: 1.2;
  color: var(--deep-navy);
  text-wrap: balance;
}
h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }

.display-title {
  font-family: var(--font-headline);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--deep-navy);
  font-weight: 800;
}
.lede {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.85;
  color: var(--slate-800);
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--blue);
}
.section-label::before {
  content: '';
  width: 1.5rem;
  height: 2px;
  background: var(--orange);
  border-radius: 2px;
}
.num {
  font-family: var(--font-headline);
  font-feature-settings: 'tnum';
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

/* ---------- 4. 容器 ---------- */
.container {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--content-pad);
}
.container--narrow { max-width: 860px; }
.section-pad { padding-block: clamp(3rem, 8vw, 6rem); }

/* ---------- 5. 网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1rem, 2.5vw, 2rem);
}
.grid-span-1 { grid-column: span 1; }
.grid-span-2 { grid-column: span 2; }
.grid-span-3 { grid-column: span 3; }
.grid-span-4 { grid-column: span 4; }
.grid-span-5 { grid-column: span 5; }
.grid-span-6 { grid-column: span 6; }
.grid-span-7 { grid-column: span 7; }
.grid-span-8 { grid-column: span 8; }
.grid-span-9 { grid-column: span 9; }
.grid-span-10 { grid-column: span 10; }
.grid-span-11 { grid-column: span 11; }
.grid-span-12 { grid-column: span 12; }

/* ---------- 6. 按钮 ---------- */
.site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.4;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.site-btn--primary {
  background: var(--orange);
  color: var(--deep-navy);
  border-color: var(--orange);
}
.site-btn--primary:hover {
  background: #FF8A4D;
  border-color: #FF8A4D;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}
.site-btn--outline {
  background: transparent;
  color: var(--deep-navy);
  border-color: rgba(10, 22, 51, 0.35);
}
.site-btn--outline:hover {
  border-color: var(--deep-navy);
  background: var(--deep-navy);
  color: var(--white);
  transform: translateY(-2px);
}
.site-btn--ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
}
.site-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--white);
}
.site-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumbs {
  margin-block: 1.25rem 0.5rem;
  font-family: var(--font-headline);
}
.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}
.breadcrumbs__item { display: inline-flex; align-items: center; }
.breadcrumbs__item + .breadcrumbs__item::before {
  content: '/';
  margin-right: 0.5rem;
  color: rgba(10, 22, 51, 0.4);
}
.breadcrumbs a { color: var(--blue); font-weight: 500; }
.breadcrumbs a:hover { text-decoration: underline; }
.breadcrumbs [aria-current="page"] { color: var(--slate-800); font-weight: 600; }

/* ---------- 8. 头部 ---------- */
.site-header {
  position: sticky;
  top: calc(-1 * var(--header-ribbon-h));
  z-index: 100;
  background-color: var(--deep-navy);
  background-image: var(--navy-grid-bg);
  background-size: 26px 26px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.site-header > * { position: relative; z-index: 1; }
.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  right: 8%;
  width: 220px;
  height: 100%;
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.035) 0 2px, transparent 2px 14px);
  pointer-events: none;
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 1rem;
  z-index: 300;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  background: var(--orange);
  color: var(--deep-navy);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.9375rem;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  transition: top 0.2s ease;
}
.skip-link:focus { top: 1rem; }

.header-ribbon {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-ribbon-h);
  padding-inline: clamp(1rem, 4vw, 2.5rem);
  background: var(--deep-navy-2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-family: var(--font-headline);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(226, 232, 240, 0.72);
  overflow: hidden;
  white-space: nowrap;
}
.ribbon-group {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
}
.ribbon-group--right { justify-content: flex-end; }
.ribbon-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  flex-shrink: 0;
  animation: ribbonPulse 2.2s ease-out infinite;
}
@keyframes ribbonPulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.55); }
  70% { box-shadow: 0 0 0 8px rgba(34, 211, 238, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0); }
}
.ribbon-text { letter-spacing: 0.12em; }
.ribbon-rule { width: 1px; height: 14px; background: rgba(255, 255, 255, 0.18); }
.ribbon-coord { color: var(--cyan); font-weight: 700; }
.ribbon-tag {
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  background: rgba(249, 115, 22, 0.16);
  color: var(--orange);
  font-size: 0.6875rem;
  font-weight: 700;
}

.header-shell {
  max-width: var(--content-max);
  height: var(--header-h);
  margin-inline: auto;
  padding-inline: var(--content-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.header-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}
.brand-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px 12px 12px 4px;
  background: var(--orange);
  color: var(--deep-navy);
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 800;
  position: relative;
  transition: transform 0.25s ease;
}
.brand-seal::after {
  content: '';
  position: absolute;
  top: -3px;
  right: -3px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  border: 2px solid var(--deep-navy);
}
a.header-brand:hover .brand-seal { transform: rotate(-6deg) scale(1.04); }
.brand-textgroup { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name {
  font-family: var(--font-headline);
  font-size: 1.1875rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.02em;
}
.brand-sub {
  font-family: var(--font-headline);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--cyan);
  opacity: 0.85;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(0.875rem, 1.75vw, 1.75rem);
  font-family: var(--font-headline);
}
.header-nav a {
  position: relative;
  color: var(--light-slate);
  font-size: 0.9375rem;
  font-weight: 500;
  padding-block: 0.5rem;
  transition: color 0.2s ease;
}
.header-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--orange);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.header-nav a:hover { color: var(--cyan); }
.header-nav a:hover::after { transform: scaleX(1); }
.header-nav a[aria-current="page"] { color: var(--white); font-weight: 700; }
.header-nav a[aria-current="page"]::after { transform: scaleX(1); }

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.375rem;
  border-radius: var(--radius-sm);
  background: var(--orange);
  color: var(--deep-navy);
  border: 1px solid var(--orange);
  font-family: var(--font-headline);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.3;
  box-shadow: 0 3px 12px rgba(249, 115, 22, 0.28);
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.header-cta::after { display: none; }
.header-cta:hover {
  background: #FF8A4D;
  border-color: #FF8A4D;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(249, 115, 22, 0.35);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.3125rem;
  padding: 0.5rem 0.625rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  color: var(--light-slate);
  font-family: var(--font-headline);
  font-size: 0.6875rem;
  line-height: 1;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 20px;
}
.nav-toggle-bar {
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(6px) 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(-6px) rotate(-45deg); }
.nav-toggle-label { letter-spacing: 0.08em; }

@media (max-width: 960px) {
  .brand-sub { display: none; }
  .nav-toggle { display: inline-flex; }
  .header-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 0.75rem var(--content-pad) 1.5rem;
    background: var(--deep-navy);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 18px 36px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  }
  .header-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }
  .header-nav a {
    display: block;
    padding: 0.875rem 0;
    font-size: 1.0625rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }
  .header-nav a::after { display: none; }
  .header-nav a[aria-current="page"] { color: var(--cyan); }
  .header-nav .header-cta {
    display: flex;
    justify-content: center;
    margin-top: 1.125rem;
    padding-block: 0.9375rem;
    border-bottom: none;
    font-size: 1rem;
  }
}

@media (max-width: 540px) {
  :root {
    --header-h: 64px;
    --header-ribbon-h: 30px;
  }
  .brand-seal {
    width: 36px;
    height: 36px;
    font-size: 1.0625rem;
    border-radius: 10px 10px 10px 3px;
  }
  .brand-seal::after { width: 8px; height: 8px; }
  .brand-name { font-size: 1.0625rem; }
  .ribbon-group--right { display: none; }
  .ribbon-text { font-size: 0.6875rem; }
}

/* ---------- 9. 页脚 ---------- */
.site-footer {
  position: relative;
  background-color: var(--deep-navy);
  background-image: var(--navy-grid-bg);
  background-size: 30px 30px;
  color: var(--light-slate);
  border-top: 3px solid var(--orange);
  overflow: hidden;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  right: -6%;
  width: 42%;
  height: 100%;
  background:
    linear-gradient(135deg, transparent 32%, rgba(249, 115, 22, 0.07) 32%, rgba(249, 115, 22, 0.07) 34.5%, transparent 34.5%),
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.025) 0 2px, transparent 2px 16px);
  pointer-events: none;
}
.footer-shell {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(3rem, 7vw, 5.5rem) var(--content-pad) clamp(2.25rem, 4vw, 3.25rem);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.9fr);
  gap: clamp(2rem, 5vw, 4rem);
}
.footer-primary { display: flex; flex-direction: column; gap: 1.25rem; }
.footer-brand-block { display: flex; align-items: center; gap: 0.875rem; }
.footer-brand-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px 14px 14px 4px;
  background: var(--orange);
  color: var(--deep-navy);
  font-family: var(--font-headline);
  font-size: 1.375rem;
  font-weight: 800;
  position: relative;
  flex-shrink: 0;
}
.footer-brand-seal::after {
  content: '';
  position: absolute;
  top: -3px;
  right: -3px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  border: 2px solid var(--deep-navy);
}
.footer-brand-text { display: flex; flex-direction: column; gap: 2px; }
.footer-brand-name {
  font-family: var(--font-headline);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--white);
}
.footer-brand-sub {
  font-family: var(--font-headline);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.footer-trust {
  border-left: 3px solid var(--orange);
  padding-left: 1rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(226, 232, 240, 0.7);
  max-width: 50ch;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.4375rem;
  margin-top: 0.25rem;
}
.footer-contact-line {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
  font-size: 0.875rem;
  color: rgba(226, 232, 240, 0.82);
}
.contact-label {
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan);
  min-width: 2.5em;
  flex-shrink: 0;
}
.footer-note {
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  color: rgba(226, 232, 240, 0.55);
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  padding: 0.625rem 0.875rem;
  background: rgba(255, 255, 255, 0.03);
}
.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-content: start;
}
.footer-links-col { display: flex; flex-direction: column; gap: 0.625rem; }
.footer-heading {
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin-bottom: 0.5rem;
}
.footer-link {
  font-family: var(--font-headline);
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--light-slate);
  width: fit-content;
  position: relative;
  padding-block: 0.1875rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-link::before {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}
.footer-link:hover { color: var(--cyan); padding-left: 4px; }
.footer-link:hover::before { transform: scaleX(1); }
.footer-link[aria-current="page"] { color: var(--orange); font-weight: 700; }
.footer-link--accent { color: var(--orange); font-weight: 700; }
.footer-link--accent:hover { color: var(--cyan); }
.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(4, 10, 26, 0.6);
}
.footer-bottom-inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 1.25rem var(--content-pad);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem 1.5rem;
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  color: rgba(226, 232, 240, 0.55);
}
.copyright, .footer-icp { margin: 0; }

@media (max-width: 960px) {
  .footer-shell { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .footer-links-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}

/* ---------- 10. 正文内容 ---------- */
.content-body { font-family: var(--font-body); font-size: 1rem; line-height: 1.85; }
.content-body p { margin-bottom: 1.25rem; }
.content-body h2 { margin-top: 2.75rem; margin-bottom: 1rem; }
.content-body h3 { margin-top: 2rem; margin-bottom: 0.75rem; }
.content-body strong { color: var(--deep-navy); font-weight: 700; }
.content-body a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.content-body ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}
.content-body li { margin-bottom: 0.5rem; }

/* ---------- 11. 图片容器 ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: var(--ink-line);
  background: var(--gray-100);
  aspect-ratio: 4 / 3;
}
.image-frame--wide { aspect-ratio: 16 / 9; }
.image-frame--portrait { aspect-ratio: 3 / 4; }
.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.image-placeholder {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    repeating-linear-gradient(45deg, rgba(10, 22, 51, 0.045) 0 2px, transparent 2px 12px),
    linear-gradient(135deg, transparent 44%, rgba(249, 115, 22, 0.18) 44%, rgba(249, 115, 22, 0.18) 50%, transparent 50%),
    var(--gray-100);
}
.image-placeholder::before {
  content: attr(data-placeholder-text);
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--deep-navy);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(10, 22, 51, 0.18);
  padding: 0.375rem 0.9375rem;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}

/* ---------- 12. 基础组件 ---------- */
.card {
  background: var(--white);
  border: var(--ink-line);
  border-radius: var(--radius-md);
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.data-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: var(--deep-navy);
  color: var(--cyan);
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
}
.data-chip::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------- 13. 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 200;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
  box-shadow: 0 0 10px rgba(249, 115, 22, 0.4);
  pointer-events: none;
}

/* ---------- 14. 显现动效 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.js-ready [data-reveal="visible"] { opacity: 1; transform: translateY(0); }
.js-ready .reveal-delay-1 { transition-delay: 0.08s; }
.js-ready .reveal-delay-2 { transition-delay: 0.16s; }
.js-ready .reveal-delay-3 { transition-delay: 0.24s; }

/* ---------- 15. 键盘焦点 ---------- */
:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 16. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .header-nav { transition: none; }
  .ribbon-pulse { animation: none; box-shadow: none; }
  .js-ready [data-reveal] { opacity: 1; transform: none; }
  .site-btn:hover,
  .card:hover,
  .header-cta:hover,
  .brand-seal:hover { transform: none; }
}