/* ============================================================
   BWIN必赢 · 共享外壳样式 /assets/site.css
   框架式导航 / 暮色矿物色 / 实色内容层 + 玻璃旁注层
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  text-underline-offset: 3px;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption, blockquote, dl, dt, dd {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

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

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

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

[hidden] { display: none !important; }

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

/* ---------- 2. Tokens ---------- */
:root {
  /* 矿物色 */
  --indigo: #16233A;
  --indigo-deep: #101A2C;
  --charcoal: #141820;
  --stone: #3B4149;
  --moss: #5B6B4E;
  --clay: #B4653F;
  --sunset: #E07A34;
  --gold: #D9A33C;
  --glacier: #4E8C8A;
  --snow: #F7F9FA;
  --rice: #F2EDE4;

  /* 半透明派生 */
  --snow-70: rgba(247, 249, 250, .70);
  --snow-55: rgba(247, 249, 250, .55);
  --snow-40: rgba(247, 249, 250, .40);
  --snow-16: rgba(247, 249, 250, .16);
  --snow-08: rgba(247, 249, 250, .08);
  --snow-05: rgba(247, 249, 250, .05);

  /* 外壳尺寸 */
  --topbar-h: 54px;
  --rail-left: 216px;
  --rail-right: 56px;
  --wrap-max: 1180px;

  /* 字体 */
  --font-display: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB",
                  "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei",
                  -apple-system, "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono",
               Menlo, Consolas, "Roboto Mono", "Courier New", monospace;

  /* 节奏 */
  --gap: 24px;
  --gap-sm: 16px;
  --radius: 4px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --hair: 1px solid var(--snow-16);
}

/* ---------- 3. Base / 中文排版 ---------- */
body {
  position: relative;
  min-height: 100vh;
  padding-top: var(--topbar-h);
  padding-left: var(--rail-left);
  padding-right: var(--rail-right);
  background-color: var(--indigo);
  background-image:
    radial-gradient(120% 78% at 8% -12%, rgba(224, 122, 52, .13), transparent 58%),
    radial-gradient(96% 70% at 104% 8%, rgba(78, 140, 138, .12), transparent 62%),
    radial-gradient(140% 90% at 50% 118%, rgba(180, 101, 63, .10), transparent 60%);
  background-attachment: fixed;
  color: var(--snow);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
}

/* 轻微噪点 / 战术板擦拭痕迹 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(247, 249, 250, .022) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(247, 249, 250, .016) 0 1px, transparent 1px 4px);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -.02em;
  text-wrap: balance;
}

h1 { font-size: clamp(28px, 4.2vw, 46px); }
h2 { font-size: clamp(22px, 3vw, 32px); }
h3 { font-size: clamp(18px, 2.1vw, 22px); }
h4 { font-size: 16px; letter-spacing: -.01em; }

p { text-wrap: pretty; }

strong, b { font-weight: 700; }

/* 键盘焦点 */
:focus-visible {
  outline: 2px solid var(--glacier);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 4. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: -72px;
  left: 14px;
  z-index: 120;
  padding: 10px 18px;
  background: var(--gold);
  color: var(--charcoal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  border-radius: var(--radius);
  transition: top .18s var(--ease);
}

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

/* ---------- 5. 顶栏 ---------- */
.frame-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--topbar-h);
  padding: 0 16px;
  background: linear-gradient(180deg, rgba(20, 24, 32, .97), rgba(22, 35, 58, .90));
  backdrop-filter: blur(12px) saturate(1.15);
  -webkit-backdrop-filter: blur(12px) saturate(1.15);
  border-bottom: 1px solid var(--snow-16);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  background: var(--sunset);
  color: var(--charcoal);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -.02em;
  border-radius: 3px;
  box-shadow: inset 0 0 0 1px rgba(20, 24, 32, .28);
  transition: background-color .16s var(--ease), transform .16s var(--ease);
}

.brand:hover .brand__mark {
  background: var(--gold);
  transform: translateY(-1px);
}

.brand__block {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand__name {
  font-size: 16px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--snow);
}

.brand__tag {
  font-size: 10.5px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: .1em;
  color: var(--snow-40);
  white-space: nowrap;
}

.frame-top__cluster {
  margin-left: auto;
  max-width: 30vw;
  padding: 3px 12px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--gold);
  white-space: nowrap;
  text-overflow: ellipsis;
  border: 1px solid rgba(217, 163, 60, .38);
  border-radius: 999px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.frame-top__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 14px;
  flex: 0 0 auto;
}

/* 移动端栏目按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  min-height: 38px;
  padding: 0 13px;
  color: var(--snow);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  border: 1px solid var(--snow-16);
  border-radius: var(--radius);
  background: var(--snow-05);
  transition: border-color .16s var(--ease), color .16s var(--ease);
}

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

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background-color .18s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform .18s var(--ease);
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

.nav-toggle__text { line-height: 1; }

/* ---------- 6. 边轨（框架式导航） ---------- */
.frame-rail {
  position: fixed;
  z-index: 60;
}

.frame-rail--main {
  top: var(--topbar-h);
  left: 0;
  bottom: 0;
  width: var(--rail-left);
  display: flex;
  flex-direction: column;
  padding: 22px 18px 20px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: linear-gradient(180deg, rgba(20, 24, 32, .93), rgba(22, 35, 58, .84));
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  border-right: 1px solid var(--snow-16);
  scrollbar-width: thin;
  scrollbar-color: var(--stone) transparent;
}

.frame-rail--main::-webkit-scrollbar { width: 6px; }
.frame-rail--main::-webkit-scrollbar-thumb {
  background: var(--stone);
  border-radius: 3px;
}

.frame-rail__head {
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--snow-40);
  border-bottom: 1px solid var(--snow-08);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 12px;
}

.nav-link {
  position: relative;
  display: block;
  padding: 9px 12px 9px 14px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--snow-70);
  border-radius: 3px;
  transition: color .16s var(--ease), background-color .16s var(--ease);
}

.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--sunset);
  transform: translateY(-50%);
  transition: height .18s var(--ease), background-color .18s var(--ease);
}

.nav-link__idx {
  margin-right: 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: rgba(247, 249, 250, .32);
  transition: color .16s var(--ease);
}

.nav-link:hover {
  color: var(--snow);
  background: var(--snow-05);
}

.nav-link:hover::before { height: 62%; }

.nav-link:hover .nav-link__idx { color: var(--gold); }

.nav-link[aria-current="page"] {
  color: var(--snow);
  background: rgba(224, 122, 52, .15);
}

.nav-link[aria-current="page"]::before {
  height: 100%;
  background: var(--sunset);
}

.nav-link[aria-current="page"] .nav-link__idx { color: var(--gold); }

.frame-rail__foot {
  display: grid;
  gap: 10px;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--snow-08);
}

.frame-rail__note {
  font-size: 11.5px;
  line-height: 1.65;
  letter-spacing: .06em;
  color: var(--snow-40);
}

/* 右侧进度边轨 */
.frame-rail--edge {
  top: var(--topbar-h);
  right: 0;
  bottom: 0;
  width: var(--rail-right);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  background: linear-gradient(180deg, rgba(20, 24, 32, .90), rgba(22, 35, 58, .68));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-left: 1px solid var(--snow-08);
}

.frame-rail__tick {
  width: 9px;
  height: 1px;
  background: var(--stone);
}

.frame-rail__track {
  position: relative;
  flex: 1 1 auto;
  width: 2px;
  margin: 14px 0;
  background: var(--snow-08);
  overflow: hidden;
}

.frame-rail__bar {
  display: block;
  width: 100%;
  height: 0;
  background: linear-gradient(180deg, var(--glacier), var(--sunset));
  transition: height .1s linear;
}

.frame-rail__text {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .3em;
  color: var(--snow-40);
}

/* ---------- 7. 页脚（横向窄带） ---------- */
.site-foot {
  position: relative;
  margin-top: 72px;
  padding: 24px 0 28px;
  background: var(--charcoal);
  border-top: 1px solid var(--snow-16);
  color: var(--snow-70);
  font-size: 13px;
}

.site-foot::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 88px;
  height: 2px;
  background: linear-gradient(90deg, var(--sunset), var(--gold));
}

.site-foot__band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
}

.site-foot__brand {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--snow);
}

.site-foot__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
}

.site-foot__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

.site-foot__link {
  color: var(--snow-70);
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.site-foot__link:hover {
  color: var(--glacier);
  border-bottom-color: var(--glacier);
}

.site-foot__rule {
  height: 1px;
  margin: 18px 0 14px;
  background: var(--snow-08);
}

.site-foot__contact {
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--snow-55);
  word-break: break-word;
}

.site-foot__note {
  max-width: 92ch;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--snow-40);
}

.site-foot__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-top: 14px;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--snow-40);
}

.site-foot__icp {
  font-family: var(--font-mono);
  letter-spacing: .08em;
  color: var(--clay);
}

/* ---------- 8. 布局容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap-max);
  margin: 0 auto;
  padding: 0 28px;
}

.wrap--narrow { max-width: 780px; }
.wrap--wide { max-width: 1420px; }

.section { padding: 48px 0; }
.section--tight { padding: 30px 0; }

.grid {
  display: grid;
  gap: var(--gap);
}

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 62fr) minmax(0, 38fr); }
.grid--split-rev { grid-template-columns: minmax(0, 38fr) minmax(0, 62fr); }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 16px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.2;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: background-color .16s var(--ease), color .16s var(--ease),
              border-color .16s var(--ease), transform .16s var(--ease);
}

.btn--primary {
  background: var(--sunset);
  border-color: var(--sunset);
  color: var(--charcoal);
}

.btn--primary:hover {
  background: var(--gold);
  border-color: var(--gold);
  transform: translateY(-1px);
}

.btn--ghost {
  background: var(--snow-05);
  border-color: var(--snow-16);
  color: var(--snow);
}

.btn--ghost:hover {
  border-color: var(--glacier);
  color: var(--glacier);
  background: rgba(78, 140, 138, .12);
}

.btn--quiet {
  border-color: rgba(78, 140, 138, .42);
  color: var(--glacier);
}

.btn--quiet:hover {
  background: rgba(78, 140, 138, .14);
  color: var(--snow);
}

.btn--block { display: flex; width: 100%; }

/* ---------- 10. 内容层：实色 + 玻璃 ---------- */
.panel {
  padding: 24px;
  background: var(--rice);
  color: var(--charcoal);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(247, 249, 250, .06), 0 22px 44px -32px rgba(0, 0, 0, .95);
}

.panel--dark {
  background: var(--charcoal);
  color: var(--snow);
  border: 1px solid var(--snow-08);
}

.panel--offset { transform: translateY(10px); }
.panel--offset-alt { transform: translateY(-8px); }

.panel .meta,
.panel .meta--time { color: var(--stone); }

.glass {
  padding: 20px;
  background: var(--snow-05);
  border: 1px solid var(--snow-16);
  border-radius: var(--radius);
  backdrop-filter: blur(14px) saturate(1.12);
  -webkit-backdrop-filter: blur(14px) saturate(1.12);
}

.panel-body { padding-top: 12px; }

/* ---------- 11. 文本组件 ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--sunset);
}

.lede {
  max-width: 68ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--snow-70);
}

.meta {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--snow-40);
}

.meta--time {
  font-family: var(--font-mono);
  color: var(--clay);
  letter-spacing: .06em;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--snow-16);
}

.section-head__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--sunset);
}

.section-head__title {
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 800;
  letter-spacing: -.02em;
}

.section-head__note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--snow-40);
  white-space: nowrap;
}

.num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}

.num--xl {
  font-size: clamp(40px, 6vw, 72px);
  line-height: .95;
  color: var(--gold);
}

.num--md {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
  color: var(--gold);
}

.num__sep {
  padding: 0 .18em;
  color: var(--stone);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--snow-70);
  border: 1px solid var(--snow-16);
  border-radius: 999px;
}

.chip--moss { color: #B8C7A6; border-color: rgba(91, 107, 78, .7); background: rgba(91, 107, 78, .2); }
.chip--clay { color: #E2A381; border-color: rgba(180, 101, 63, .62); background: rgba(180, 101, 63, .18); }
.chip--glacier { color: #93CBC9; border-color: rgba(78, 140, 138, .62); background: rgba(78, 140, 138, .16); }
.chip--sunset { color: #F2A66C; border-color: rgba(224, 122, 52, .6); background: rgba(224, 122, 52, .16); }

/* ---------- 12. 面包屑与目录索引 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--snow-40);
}

.crumbs a {
  color: var(--glacier);
  border-bottom: 1px solid transparent;
  transition: border-color .16s var(--ease);
}

.crumbs a:hover { border-bottom-color: var(--glacier); }

.crumbs__sep { color: var(--stone); }

.index-list {
  display: grid;
  gap: 2px;
}

.index-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 14px;
  border-bottom: 1px solid var(--snow-08);
  transition: background-color .16s var(--ease), transform .16s var(--ease);
}

.index-item:hover {
  background: var(--snow-05);
  transform: translateX(3px);
}

.index-item__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
}

/* ---------- 13. 纵向比分轨道 ---------- */
.score-rail {
  position: relative;
  padding-left: 28px;
}

.score-rail::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, var(--sunset), var(--stone) 48%, var(--glacier));
}

.score-node {
  position: relative;
  padding: 16px 0;
  border-bottom: 1px solid var(--snow-08);
}

.score-node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(217, 163, 60, .18);
}

.score-node__meta {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--snow-40);
}

.score-node__score {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 6px;
}

.score-node__toggle {
  padding: 4px 0;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--glacier);
  border-bottom: 1px solid transparent;
}

.score-node__toggle:hover { border-bottom-color: var(--glacier); }

/* ---------- 14. 主题筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  border-bottom: 1px solid var(--snow-08);
}

.filter-btn {
  min-height: 34px;
  padding: 0 15px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--snow-70);
  background: var(--snow-05);
  border: 1px solid var(--snow-16);
  border-radius: 999px;
  transition: color .16s var(--ease), background-color .16s var(--ease),
              border-color .16s var(--ease);
}

.filter-btn:hover {
  color: var(--snow);
  border-color: var(--glacier);
}

.filter-btn[aria-pressed="true"] {
  background: var(--glacier);
  border-color: var(--glacier);
  color: #0B1413;
}

.filter-bar__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--snow-40);
}

[data-filter-items] {
  transition: opacity .16s var(--ease);
}

[data-filter-items].is-swapping { opacity: 0; }

/* ---------- 15. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--snow-16);
  border-radius: var(--radius);
  background-color: var(--indigo-deep);
  background-image:
    linear-gradient(135deg, rgba(91, 107, 78, .55), rgba(22, 35, 58, .94) 62%),
    repeating-linear-gradient(45deg, rgba(247, 249, 250, .05) 0 7px, transparent 7px 14px),
    radial-gradient(80% 70% at 22% 18%, rgba(224, 122, 52, .28), transparent 60%);
}

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

.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame--tilt-left { transform: rotate(-1.1deg); }
.media-frame--tilt-right { transform: rotate(1.1deg); }

.media-frame__cap {
  position: absolute;
  left: 10px;
  bottom: 10px;
  max-width: calc(100% - 20px);
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--snow);
  background: rgba(20, 24, 32, .78);
  border-radius: 2px;
}

/* ---------- 16. 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .22s linear, transform .22s linear;
}

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

.is-spotlit {
  animation: spot 1.2s ease-out 1;
}

@keyframes spot {
  from { box-shadow: 0 0 0 3px rgba(217, 163, 60, .55); }
  to { box-shadow: 0 0 0 3px rgba(217, 163, 60, 0); }
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1180px) {
  .grid--split,
  .grid--split-rev { grid-template-columns: minmax(0, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1079px) {
  :root {
    --rail-left: 172px;
    --rail-right: 44px;
  }

  .wrap { padding: 0 22px; }

  .nav-link {
    padding: 8px 10px 8px 13px;
    font-size: 13.5px;
  }

  .nav-link__idx { margin-right: 7px; }

  .frame-top__cluster { letter-spacing: .1em; }
  .brand__tag { font-size: 10px; }
}

@media (max-width: 900px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 767px) {
  :root {
    --rail-left: 0px;
    --rail-right: 0px;
    --topbar-h: 56px;
    --gap: 18px;
  }

  body { font-size: 16px; }

  .frame-top { padding: 0 14px; gap: 12px; }

  .brand__tag,
  .frame-top__cluster,
  .frame-top__actions .btn--ghost { display: none; }

  .brand__mark { flex-basis: 30px; width: 30px; height: 30px; }

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

  .frame-rail--edge { display: none; }

  .frame-rail--main {
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    padding: 18px 18px 26px;
    background: rgba(16, 26, 44, .97);
    border-right: 0;
    border-top: 1px solid var(--snow-16);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s;
    z-index: 62;
  }

  .frame-rail--main[data-open] {
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-list { gap: 0; margin-top: 8px; }

  .nav-link {
    padding: 13px 12px 13px 14px;
    font-size: 16.5px;
    border-bottom: 1px solid var(--snow-08);
    border-radius: 0;
  }

  .nav-link::before { height: 0; }
  .nav-link[aria-current="page"] { background: rgba(224, 122, 52, .13); }

  .frame-rail__foot { margin-top: 26px; }

  body.is-nav-open { overflow: hidden; }

  .wrap { padding: 0 18px; }

  .section { padding: 34px 0; }

  .panel { padding: 18px; }
  .glass { padding: 16px; }

  .section-head {
    flex-wrap: wrap;
    gap: 8px;
  }

  .section-head__note {
    margin-left: 0;
    width: 100%;
    white-space: normal;
  }

  .site-foot { margin-top: 52px; }
  .site-foot__band { gap: 10px 18px; }
  .site-foot__legal { gap: 6px 14px; }
}

@media (max-width: 420px) {
  .brand__name { font-size: 15px; }
  .num--xl { font-size: clamp(34px, 12vw, 46px); }
}

/* ---------- 18. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .is-spotlit { animation: none; }

  .frame-rail__bar { transition: none; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}