/* ============================================================
   YABO(中国)官方网站 — 全站共享 Site Kit
   /assets/site.css
   赛况集结号 / 深色竞技面板
   ============================================================ */

/* ---------- 1. CSS 变量 ---------- */
:root {
  --color-navy: #0B1B2B;
  --color-navy-deep: #060F18;
  --color-charcoal: #111827;
  --color-glass: rgba(30, 42, 56, 0.82);
  --color-glass-soft: rgba(30, 42, 56, 0.55);
  --color-orange: #FF6D00;
  --color-orange-deep: #E85F00;
  --color-orange-soft: rgba(255, 109, 0, 0.14);
  --color-blue: #00E5FF;
  --color-blue-deep: #00B8CC;
  --color-blue-soft: rgba(0, 229, 255, 0.12);
  --color-text: #F5F7FA;
  --color-muted: #A0B0C0;
  --color-success: #00E676;
  --color-warn: #FFB300;
  --color-error: #FF5252;

  --font-display: "Arial Black", Impact, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --container-w: 1280px;
  --header-h: 78px;
  --radius: 6px;
  --radius-lg: 14px;
  --glass-border: 1px solid rgba(255, 255, 255, 0.08);
  --orange-glow: 0 0 24px rgba(255, 109, 0, 0.45);
  --blue-glow: 0 0 20px rgba(0, 229, 255, 0.35);
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --speed-fast: 0.2s;
  --speed-base: 0.3s;
  --speed-slow: 0.55s;
}

/* ---------- 2. Reset 与基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-navy);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.01em;
}

a {
  color: var(--color-blue);
  text-decoration: none;
  transition: color var(--speed-fast) ease, border-color var(--speed-fast) ease, background-color var(--speed-fast) ease, box-shadow var(--speed-base) ease;
}
a:hover { color: var(--color-orange); }

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--color-orange); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-navy-deep); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--color-orange), var(--color-blue-deep));
  border: 2px solid var(--color-navy-deep);
  border-radius: 4px;
}

:focus-visible {
  outline: 3px solid var(--color-blue);
  outline-offset: 2px;
  border-radius: 2px;
}
.brand-link:focus-visible,
.nav-link:focus-visible,
.btn:focus-visible,
.nav-toggle:focus-visible,
.footer-links a:focus-visible,
.breadcrumb a:focus-visible {
  outline-color: var(--color-orange);
}

/* ---------- 3. 通用工具 ---------- */
.container {
  width: min(var(--container-w), calc(100% - 48px));
  margin-inline: auto;
}

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

[id] { scroll-margin-top: calc(var(--header-h) + 16px); }
[data-year] { font-variant-numeric: tabular-nums; font-weight: 700; }

.skip-link {
  position: fixed;
  top: -96px;
  left: 24px;
  z-index: 600;
  padding: 14px 24px;
  background: var(--color-orange);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.06em;
  border-radius: 0 0 8px 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  transition: top var(--speed-base) var(--ease-out);
}
.skip-link:hover { color: #fff; background: var(--color-orange-deep); }
.skip-link:focus { top: 0; color: #fff; }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--speed-fast) ease, color var(--speed-fast) ease, box-shadow var(--speed-base) ease, transform var(--speed-fast) ease, border-color var(--speed-fast) ease;
}
.btn:active { transform: translateY(1px); }

.btn--login {
  background: linear-gradient(135deg, var(--color-orange), #F25000 90%);
  color: #fff;
  box-shadow: 0 2px 12px rgba(255, 109, 0, 0.35);
}
.btn--login::after {
  content: "→";
  font-weight: 900;
  transition: transform var(--speed-fast) ease;
}
.btn--login:hover { background: linear-gradient(135deg, #FF7A1A, var(--color-orange)); color: #fff; box-shadow: var(--orange-glow); }
.btn--login:hover::after { transform: translateX(3px); }

.btn--primary { background: var(--color-orange); color: #fff; }
.btn--primary:hover { background: #FF7A1A; color: #fff; box-shadow: var(--orange-glow); }

.btn--ghost {
  background: transparent;
  border-color: rgba(0, 229, 255, 0.5);
  color: var(--color-blue);
}
.btn--ghost:hover { background: var(--color-blue-soft); color: var(--color-blue); box-shadow: var(--blue-glow); }

.btn-login__long { display: inline; }
.btn-login__short { display: none; }

/* ---------- 5. 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0.97), rgba(11, 27, 43, 0.88));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background var(--speed-base) ease, box-shadow var(--speed-base) ease;
}
.site-header.is-scrolled {
  background: rgba(6, 15, 24, 0.96);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}

.header-shell {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header-brand { display: flex; align-items: center; flex: 0 0 auto; }

.brand-link { display: inline-flex; align-items: center; gap: 12px; color: var(--color-text); }
.brand-link:hover { color: var(--color-text); }

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--color-orange), #C43E00);
  clip-path: polygon(20% 0, 80% 0, 100% 16%, 100% 78%, 80% 100%, 30% 100%, 0 82%, 0 16%);
  box-shadow: 0 4px 14px rgba(255, 109, 0, 0.35);
}
.brand-mark__badge {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.45);
}
.brand-mark__pulse {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.35), transparent 55%);
  animation: brandPulse 2.6s ease-in-out infinite;
  pointer-events: none;
}
@keyframes brandPulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.9; }
}

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text__name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.05em;
}
.brand-text__cn { font-size: 0.76em; color: var(--color-muted); margin-left: 2px; }
.brand-text__tagline {
  margin-top: 3px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.3em;
  color: var(--color-orange);
  text-transform: uppercase;
}

.header-actions { display: flex; align-items: center; gap: clamp(10px, 2vw, 28px); }

/* ---------- 导航 ---------- */
.site-nav .nav-list { display: flex; align-items: center; gap: 2px; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  color: var(--color-muted);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-blue));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--speed-base) var(--ease-out);
}
.nav-link:hover { color: var(--color-text); }
.nav-link:hover::after,
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: #fff; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  padding: 11px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
  transition: border-color var(--speed-fast) ease;
}
.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform var(--speed-fast) var(--ease-out), opacity var(--speed-fast) ease, background var(--speed-fast) ease;
}
.nav-toggle:hover { border-color: var(--color-blue); }
.nav-toggle:hover .nav-toggle__bar { background: var(--color-blue); }
.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); }

.header-ticker {
  height: 3px;
  background: linear-gradient(90deg, rgba(255, 109, 0, 0.18), rgba(0, 229, 255, 0.16));
  overflow: hidden;
}
.header-ticker__line {
  display: block;
  width: 32%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--color-blue), transparent);
  animation: tickerSweep 3s var(--ease-out) infinite;
}
@keyframes tickerSweep {
  0% { transform: translateX(-110%); }
  100% { transform: translateX(330%); }
}

.page-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 210;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}
.page-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-orange), var(--color-blue));
  transform: scaleX(0);
  transform-origin: left center;
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.6);
  transition: transform 80ms linear;
}

/* ---------- 移动端导航 ---------- */
@media (max-width: 1023.98px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(6, 15, 24, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 28px 56px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--speed-base) var(--ease-out), transform var(--speed-base) var(--ease-out), visibility var(--speed-base) var(--ease-out);
  }
  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
  }
  .nav-item { border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
  .nav-item:last-child { border-bottom: 0; }

  .nav-link {
    width: 100%;
    min-height: 50px;
    padding: 0 12px;
    font-size: 16px;
    justify-content: space-between;
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] { color: var(--color-orange); }
}

@media (max-width: 560px) {
  .btn-login__long { display: none; }
  .btn-login__short { display: inline; }
  .brand-text__cn { display: none; }
  .brand-text__tagline { display: none; }
  .brand-text__name { font-size: 18px; }
  .brand-mark { width: 42px; height: 42px; }
  .brand-mark__badge { font-size: 20px; }
  .header-actions { gap: 10px; }
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  flex-shrink: 0;
  margin-top: 80px;
  background: linear-gradient(180deg, var(--color-navy-deep) 0%, var(--color-navy) 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-orange), transparent 32%, var(--color-blue));
  opacity: 0.7;
  pointer-events: none;
}
.site-footer::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -70px;
  width: 340px;
  height: 340px;
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.02) 0 12px, transparent 12px 28px);
  pointer-events: none;
}

.footer-main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding: 68px 0 48px;
}
.footer-main::after {
  content: "YABO";
  position: absolute;
  right: 0;
  bottom: -18px;
  z-index: -1;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(100px, 12vw, 200px);
  line-height: 0.8;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.016);
  pointer-events: none;
}

.footer-brand { max-width: 340px; }
.brand-link--footer { padding: 0; }
.brand-link--footer .brand-text__name { font-size: 18px; }

.footer-about { margin: 22px 0 14px; color: var(--color-muted); font-size: 15px; line-height: 1.85; }

.footer-trust {
  padding-left: 14px;
  border-left: 3px solid var(--color-orange);
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.75;
  opacity: 0.9;
}

.footer-col { min-width: 0; }

.footer-heading {
  position: relative;
  margin-bottom: 20px;
  padding-bottom: 10px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-text);
}
.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-blue));
}

.footer-links li + li { margin-top: 4px; }
.footer-links a {
  position: relative;
  display: inline-block;
  padding: 6px 0 6px 16px;
  color: var(--color-muted);
  font-size: 14px;
  transition: color var(--speed-base) ease, padding-left var(--speed-base) ease;
}
.footer-links a::before {
  content: "›";
  position: absolute;
  left: 0;
  top: 6px;
  color: var(--color-blue);
  font-weight: 700;
}
.footer-links a:hover { color: var(--color-text); padding-left: 20px; }
.footer-links a:hover::before { color: var(--color-orange); }

.footer-contact li {
  position: relative;
  margin-bottom: 12px;
  padding-left: 20px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.7;
}
.footer-contact li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--color-blue);
  opacity: 0.55;
  transform: rotate(45deg);
}
.footer-contact__note { font-size: 12px; opacity: 0.75; }

.footer-support { margin-top: 14px; }

.footer-bottom {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding: 22px 0 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: rgba(160, 176, 192, 0.75);
  font-size: 13px;
}
.footer-bottom p { margin: 0; }
.footer-icp { display: inline-flex; align-items: center; gap: 10px; }
.footer-icp a { color: rgba(160, 176, 192, 0.85); }
.footer-icp a:hover { color: var(--color-orange); }

@media (max-width: 1023.98px) {
  .footer-main { grid-template-columns: 1fr 1fr; gap: 36px; padding: 56px 0 40px; }
  .footer-brand { grid-column: 1 / -1; max-width: 100%; }
}
@media (max-width: 560px) {
  .footer-main { grid-template-columns: 1fr; gap: 32px; padding: 48px 0 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; justify-content: flex-start; }
}

/* ---------- 7. 主内容与通用组件 ---------- */
#main-content {
  position: relative;
  flex: 1 0 auto;
  display: block;
  padding-top: calc(var(--header-h) + 4px);
  outline: none;
  background:
    radial-gradient(ellipse 1000px 300px at 18% -60px, rgba(255, 109, 0, 0.06), transparent 70%),
    radial-gradient(ellipse 800px 240px at 82% -50px, rgba(0, 229, 255, 0.05), transparent 70%);
}
#main-content:focus { outline: none; }

.section { padding: 72px 0; }
.section--tight { padding: 44px 0; }

.split-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 32px 48px;
  align-items: center;
}

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (max-width: 900px) {
  .split-panel { grid-template-columns: 1fr; gap: 28px; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .section { padding: 52px 0; }
  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }
}

.breadcrumb {
  padding: 4px 0 0;
  margin: 18px 0 8px;
  font-size: 14px;
  color: var(--color-muted);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; }
.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li + li::before { content: "/"; margin: 0 8px; color: rgba(160, 176, 192, 0.4); }
.breadcrumb a { display: inline-block; padding: 4px 0; color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-orange); }
.breadcrumb [aria-current="page"] { color: var(--color-text); font-weight: 700; }

.page-title {
  margin-bottom: 14px;
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1.06;
  color: #fff;
  text-transform: uppercase;
}
.page-lead {
  max-width: 36em;
  margin-bottom: 28px;
  color: var(--color-muted);
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.9;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-orange);
}
.section-label::before {
  content: "";
  width: 36px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-orange), transparent);
}
.section-label--vertical {
  display: inline-block;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  margin: 0;
  font-size: 11px;
  color: var(--color-muted);
  letter-spacing: 0.34em;
}

.card {
  position: relative;
  padding: 28px;
  background: var(--color-glass-soft);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  transition: transform var(--speed-base) var(--ease-out), box-shadow var(--speed-base) ease, border-color var(--speed-base) ease, background-color var(--speed-base) ease;
}
.card::before {
  content: "";
  position: absolute;
  top: 8px;
  right: 8px;
  width: 26px;
  height: 26px;
  border-top: 2px solid var(--color-blue);
  border-right: 2px solid var(--color-blue);
  opacity: 0.4;
  pointer-events: none;
  transition: opacity var(--speed-fast) ease;
}
.card:hover {
  background: var(--color-glass);
  border-color: rgba(0, 229, 255, 0.28);
  box-shadow: var(--blue-glow);
  transform: translateY(-3px);
}
.card:hover::before { opacity: 1; }

.card--glass {
  background: var(--color-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.card--glass:hover { background: rgba(30, 42, 56, 0.92); }

.card__title { margin-bottom: 12px; color: #fff; font-size: 20px; font-weight: 800; }
.card__body { color: var(--color-muted); font-size: 15px; line-height: 1.85; }
.card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--color-blue);
  font-size: 13px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: clamp(38px, 6vw, 64px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-orange);
  text-shadow: 0 0 20px rgba(255, 109, 0, 0.35);
}
.stat-value--blue { color: var(--color-blue); text-shadow: 0 0 20px rgba(0, 229, 255, 0.4); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-glass);
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
}
.badge--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-orange);
  box-shadow: 0 0 8px var(--color-orange);
  animation: dotPulse 1.6s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { opacity: 0.4; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1); }
}
.badge--ok { color: var(--color-success); border-color: rgba(0, 230, 118, 0.4); background: rgba(0, 230, 118, 0.08); }
.badge--warn { color: var(--color-warn); border-color: rgba(255, 179, 0, 0.4); background: rgba(255, 179, 0, 0.08); }
.badge--err { color: var(--color-error); border-color: rgba(255, 82, 82, 0.4); background: rgba(255, 82, 82, 0.08); }

.divider-line {
  height: 1px;
  margin: 48px 0;
  border: 0;
  background: linear-gradient(90deg, var(--color-orange), var(--color-blue) 55%, transparent);
  opacity: 0.65;
}

.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--glass-border);
  border-radius: var(--radius);
  background: var(--color-charcoal);
  aspect-ratio: var(--img-ratio, 16 / 9);
}
.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out), opacity 0.4s ease;
}
.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 27, 43, 0.25), transparent 60%);
  pointer-events: none;
}
.img-frame:hover img { transform: scale(1.04); }
.img-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: 20px 16px 12px;
  background: linear-gradient(transparent, rgba(6, 15, 24, 0.92));
  color: var(--color-text);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.text-body { color: var(--color-muted); font-size: 16px; line-height: 1.95; }
.text-body p { margin-bottom: 1.2em; }
.text-body strong { color: var(--color-text); }
.text-body em { color: var(--color-blue); font-style: normal; }

/* ---------- 8. 滚动显现 ---------- */
html:not(.js) [data-reveal] { opacity: 1; transform: none; }
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--speed-slow) var(--ease-out), transform var(--speed-slow) var(--ease-out);
  will-change: opacity, transform;
}
.js [data-reveal].is-revealed { opacity: 1; transform: translateY(0); }

/* ---------- 9. 无障碍与降级 ---------- */
@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;
  }
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .page-progress__bar { transition: none; }
  .brand-mark__pulse,
  .header-ticker__line,
  .badge--live::before { animation: none; }
}