/* ==========================================================================
   乐鱼赛事 · 共享样式 /assets/site.css
   深色底 + 亮色数据层 · 切角面板 · 悬浮胶囊导航 · 窄条信息带页脚
   ========================================================================== */

/* ---------- 1. 变量与重置 ---------- */
:root {
  --ink: #05090F;
  --deep: #0D1B2A;
  --glass: #12293A;
  --white: #F2F6FA;
  --mist: #7A8B9E;
  --mist-soft: rgba(122, 139, 158, .26);
  --cyan: #00E4D0;
  --aqua: #2F7BFF;
  --coral: #FF5C39;
  --yellow: #FFD60A;
  --shade: #0A3A44;

  --font-display: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-data: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", "Noto Sans Mono CJK SC", monospace;

  --pad-x: clamp(18px, 4vw, 56px);
  --shell-max: 1240px;
  --cut: 26px;
  --ease: cubic-bezier(.22, .68, .18, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 140px;
}

html[data-nav-open] { overflow: hidden; }

body {
  margin: 0;
  color: var(--white);
  font-family: var(--font-body);
  font-size: clamp(16px, 1.02vw, 17px);
  line-height: 1.75;
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 520px at 84% -12%, rgba(47, 123, 255, .17), transparent 66%),
    radial-gradient(760px 460px at 6% 6%, rgba(0, 228, 208, .10), transparent 72%),
    repeating-linear-gradient(0deg, rgba(242, 246, 250, .022) 0 1px, transparent 1px 5px);
  background-attachment: fixed, fixed, fixed;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .6em;
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 300;
  letter-spacing: -.01em;
}

p { margin: 0 0 1em; }

a { color: var(--aqua); text-decoration: none; }
a:hover { color: var(--cyan); }

img { max-width: 100%; height: auto; border: 0; }

ul, ol { margin: 0 0 1em; padding-left: 1.2em; }

button { font: inherit; color: inherit; }

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

::selection { background: rgba(0, 228, 208, .3); color: #ffffff; }

#main-content {
  display: block;
  padding-top: clamp(104px, 13vw, 156px);
}

/* ---------- 2. 通用工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-inline: var(--pad-x);
}

.section { padding-block: clamp(64px, 9vw, 144px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 32px;
  margin-bottom: clamp(24px, 4vw, 52px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(0, 228, 208, .7);
}

.section-num {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--mist);
}

.display-xl {
  font-family: var(--font-display);
  font-size: clamp(44px, 9vw, 132px);
  line-height: .95;
  font-weight: 200;
  letter-spacing: -.03em;
  margin: 0 0 .3em;
}

.display-l {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.6vw, 64px);
  line-height: 1.04;
  font-weight: 250;
  letter-spacing: -.02em;
  margin: 0 0 .5em;
}

.lead {
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.7;
  color: #CBD7E4;
  max-width: 64ch;
}

.mono { font-family: var(--font-data); font-variant-numeric: tabular-nums; }
.muted { color: var(--mist); }

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

.rule {
  height: 2px;
  border: 0;
  margin: 0 0 clamp(20px, 3vw, 36px);
  background: linear-gradient(90deg, var(--cyan), rgba(0, 228, 208, 0) 72%);
}

.slash-divider {
  height: clamp(56px, 7vw, 112px);
  margin-inline: var(--pad-x);
  background-image: repeating-linear-gradient(90deg, rgba(0, 228, 208, .2) 0 1px, transparent 1px 28px);
  clip-path: polygon(0 0, 100% 0, calc(100% - 34px) 100%, 0 100%);
  opacity: .75;
}

/* ---------- 3. 面板与栅格 ---------- */
.panel {
  position: relative;
  padding: clamp(26px, 4vw, 64px);
  background:
    linear-gradient(158deg, rgba(13, 27, 42, .95), rgba(5, 9, 15, .98) 72%);
  box-shadow: inset 0 0 0 1px rgba(122, 139, 158, .18);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.panel::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 120px; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 228, 208, .8));
}

.grid { display: grid; gap: clamp(20px, 3vw, 40px); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid-8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }

/* ---------- 4. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(120% 100% at 16% 0%, var(--shade), var(--ink) 72%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.media-frame > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(.8) saturate(.9) contrast(1.06);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(5, 9, 15, .06), rgba(5, 9, 15, .74)),
    repeating-linear-gradient(0deg, rgba(0, 228, 208, .07) 0 1px, transparent 1px 4px);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 16px 18px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--white);
  background: linear-gradient(180deg, transparent, rgba(5, 9, 15, .92));
  opacity: .9;
  transform: translateY(10px);
  transition: transform .35s var(--ease), opacity .35s var(--ease);
}

.media-frame:hover .media-caption { transform: none; opacity: 1; }

/* ---------- 5. 数据行 / 数字 / 标签 ---------- */
.data-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.data-row {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 12px 12px 12px 14px;
  border-bottom: 1px solid var(--mist-soft);
  transition: transform .25s var(--ease), background .25s var(--ease);
}

.data-row::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform .25s var(--ease);
}

.data-row:hover { transform: translateX(6px); background: rgba(18, 41, 58, .55); }
.data-row:hover::before { transform: scaleY(1); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .1em;
  border: 1px solid rgba(122, 139, 158, .38);
  color: var(--mist);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.tag--cyan { border-color: rgba(0, 228, 208, .5); color: var(--cyan); }
.tag--coral { border-color: rgba(255, 92, 57, .5); color: var(--coral); }
.tag--yellow { border-color: rgba(255, 214, 10, .5); color: var(--yellow); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  color: var(--white);
  background: rgba(18, 41, 58, .6);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: transform .25s var(--ease), background .25s var(--ease), color .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}

.btn-primary {
  color: #03181A;
  background: linear-gradient(118deg, var(--cyan), #12B9D6);
  box-shadow: 0 8px 24px rgba(0, 228, 208, .22);
}

.btn-primary:hover {
  color: #03181A;
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(0, 228, 208, .34);
}

.btn-ghost {
  border-color: rgba(122, 139, 158, .42);
  background: rgba(18, 41, 58, .48);
}

.btn-ghost:hover {
  color: var(--cyan);
  border-color: rgba(0, 228, 208, .7);
  background: rgba(0, 228, 208, .1);
}

.btn-sm { padding: 9px 15px; font-size: 13.5px; }
.btn-block { width: 100%; }

/* ---------- 7. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(16px, 2vw, 28px);
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: rgba(122, 139, 158, .6);
}

.breadcrumb a { color: var(--mist); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb [aria-current="page"] { color: var(--white); }

/* ---------- 8. 章节目录与工具胶囊 ---------- */
.toc { position: sticky; top: clamp(120px, 16vh, 168px); }

.toc-title {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.toc-list { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 2px; }

.toc-link {
  display: block;
  padding: 8px 12px 8px 16px;
  font-size: 14px;
  color: var(--mist);
  border-left: 1px solid var(--mist-soft);
  transition: color .2s var(--ease), border-color .2s var(--ease), padding-left .2s var(--ease);
}

.toc-link:hover { color: var(--white); border-color: var(--cyan); padding-left: 20px; }
.toc-link[aria-current="true"] { color: var(--cyan); border-color: var(--cyan); }

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  z-index: 140;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  background: linear-gradient(90deg, var(--cyan), var(--aqua));
  box-shadow: 0 0 14px rgba(0, 228, 208, .6);
}

.to-top {
  position: fixed;
  right: clamp(14px, 2vw, 28px);
  bottom: clamp(14px, 2vw, 28px);
  z-index: 130;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border: 1px solid rgba(0, 228, 208, .42);
  background: rgba(5, 9, 15, .86);
  color: var(--cyan);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .16em;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s var(--ease), background .3s var(--ease);
}

.to-top[data-visible] { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: rgba(0, 228, 208, .16); color: var(--cyan); }

/* ---------- 9. 显现动画协议 ---------- */
html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

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

/* ---------- 10. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -90px;
  left: 16px;
  z-index: 200;
  padding: 11px 20px;
  background: var(--cyan);
  color: #03181A;
  font-weight: 800;
  font-size: 14px;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: top .25s var(--ease);
}

.skip-link:focus { top: 16px; color: #03181A; }

/* ---------- 11. 悬浮胶囊头部 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 120;
  display: flex;
  justify-content: center;
  padding: clamp(12px, 2vw, 26px) var(--pad-x);
  pointer-events: none;
}

.nav-capsule {
  position: relative;
  isolation: isolate;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
  width: 100%;
  max-width: var(--shell-max);
  padding: 10px 14px 10px 18px;
  transition: padding .3s var(--ease), max-width .4s var(--ease);
}

.nav-capsule::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(120deg, rgba(13, 27, 42, .94), rgba(5, 9, 15, .88));
  box-shadow:
    inset 0 0 0 1px rgba(122, 139, 158, .24),
    0 18px 44px rgba(0, 0, 0, .48);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  backdrop-filter: blur(16px) saturate(120%);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.site-header[data-scrolled] .nav-capsule { padding: 6px 12px 6px 14px; }

.site-header[data-scrolled] .nav-capsule::before {
  background: linear-gradient(120deg, rgba(5, 9, 15, .82), rgba(5, 9, 15, .74));
  box-shadow:
    inset 0 0 0 1px rgba(0, 228, 208, .3),
    0 12px 30px rgba(0, 0, 0, .5);
}

/* 品牌浮岛 */
.brand-island {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  color: var(--white);
  text-decoration: none;
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  background: linear-gradient(140deg, var(--cyan), var(--aqua));
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  box-shadow: 0 0 20px rgba(0, 228, 208, .45);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 8px 8px 8px 7px;
  background: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.brand-copy { display: flex; flex-direction: column; }

.brand-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .04em;
}

.brand-line {
  font-family: var(--font-data);
  font-size: 10.5px;
  line-height: 1.5;
  letter-spacing: .08em;
  color: var(--mist);
  white-space: nowrap;
}

/* 主栏目 */
.nav-main { flex: 1 1 auto; display: flex; justify-content: center; min-width: 0; }
.nav-list { display: flex; align-items: center; gap: clamp(2px, 1vw, 14px); margin: 0; padding: 0; list-style: none; }
.nav-list li { display: block; }

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 9px 12px;
  font-size: 14.5px;
  letter-spacing: .02em;
  white-space: nowrap;
  color: var(--mist);
  border-radius: 999px;
  transition: color .25s var(--ease), background .25s var(--ease);
}

.nav-list a:hover { color: var(--white); background: rgba(0, 228, 208, .09); }

.nav-list a[aria-current="page"] { color: var(--white); }

.nav-list a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 4px;
  height: 2px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(0, 228, 208, .75);
}

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

/* 移动端按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 14px;
  border: 1px solid rgba(0, 228, 208, .42);
  background: rgba(0, 228, 208, .08);
  color: var(--cyan);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  z-index: 4;
}

.nav-toggle-bars { display: grid; gap: 5px; width: 18px; }

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

.nav-capsule[data-open] .nav-toggle-bars i:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav-capsule[data-open] .nav-toggle-bars i:last-child { transform: translateY(-3.5px) rotate(-45deg); }

.nav-toggle-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .16em;
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(72px, 9vw, 152px);
  border-top: 1px solid rgba(122, 139, 158, .22);
  background: linear-gradient(180deg, rgba(13, 27, 42, .72), rgba(5, 9, 15, .98) 78%);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px; left: 0;
  width: min(440px, 46%);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(0, 228, 208, 0));
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1.1fr) minmax(0, 2fr);
  gap: clamp(24px, 4vw, 64px);
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(40px, 5.5vw, 76px) var(--pad-x) clamp(24px, 3.5vw, 44px);
}

.footer-brand {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 800;
  letter-spacing: .04em;
}

.footer-brand-line {
  margin: 0 0 16px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

.footer-note {
  margin: 0;
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 48px);
}

.footer-group-title {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }

.footer-link {
  display: inline-block;
  font-size: 14.5px;
  color: var(--white);
  border-bottom: 1px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease);
}

.footer-link:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translateX(4px);
}

.footer-dl {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 14px;
  margin: 0;
  font-family: var(--font-data);
  font-size: 12.5px;
  line-height: 1.6;
}

.footer-dl dt { color: var(--mist); letter-spacing: .12em; }
.footer-dl dd { margin: 0; color: var(--white); overflow-wrap: anywhere; }

.footer-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 14px var(--pad-x) 18px;
  border-top: 1px solid rgba(122, 139, 158, .2);
  font-family: var(--font-data);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mist);
}

.footer-band-item { white-space: nowrap; }
.footer-icp { color: rgba(122, 139, 158, .85); }

/* ---------- 13. 平板与移动 ---------- */
@media (max-width: 1100px) {
  .nav-capsule { padding: 8px 10px; gap: 10px; }
  .brand-line { display: none; }
  .nav-toggle { display: inline-flex; }

  .nav-main {
    position: fixed;
    inset: 0;
    z-index: 2;
    flex-direction: column;
    justify-content: flex-start;
    overflow-y: auto;
    padding: clamp(96px, 18vh, 148px) var(--pad-x) 150px;
    background:
      radial-gradient(760px 460px at 82% 0%, rgba(47, 123, 255, .2), transparent 70%),
      radial-gradient(560px 420px at 0% 100%, rgba(0, 228, 208, .12), transparent 72%),
      linear-gradient(180deg, rgba(5, 9, 15, .99), rgba(9, 22, 34, .995));
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-14px);
    transition: opacity .32s var(--ease), transform .32s var(--ease), visibility .32s var(--ease);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    counter-reset: navidx;
    width: 100%;
  }

  .nav-list li { counter-increment: navidx; position: relative; }

  .nav-list li::before {
    content: "0" counter(navidx);
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-data);
    font-size: 12px;
    letter-spacing: .16em;
    color: rgba(122, 139, 158, .7);
  }

  .nav-list a {
    display: block;
    padding: 16px 8px 16px 46px;
    font-family: var(--font-display);
    font-size: clamp(24px, 6.4vw, 40px);
    font-weight: 200;
    letter-spacing: -.01em;
    color: var(--white);
    border-bottom: 1px solid rgba(122, 139, 158, .18);
    border-radius: 0;
  }

  .nav-list a:hover { background: rgba(0, 228, 208, .06); }

  .nav-list a[aria-current="page"]::after {
    left: 46px; right: auto; bottom: 12px;
    width: 40px;
  }

  .nav-actions {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 3;
    gap: 10px;
    padding: 20px var(--pad-x) calc(20px + env(safe-area-inset-bottom, 0px));
    background: linear-gradient(180deg, rgba(5, 9, 15, 0), rgba(5, 9, 15, .96) 42%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity .32s var(--ease), transform .32s var(--ease), visibility .32s var(--ease);
  }

  .nav-capsule[data-open] .nav-actions {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .nav-actions .btn { flex: 1 1 0; }
}

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-7-5, .grid-8-4 { grid-template-columns: minmax(0, 1fr); }

  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-note { max-width: none; }
}

@media (max-width: 640px) {
  .display-xl { font-size: clamp(38px, 13vw, 72px); }
  .media-frame { aspect-ratio: 4 / 3; }
  .media-frame--tall { aspect-ratio: 3 / 4; }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .footer-band { gap: 6px 18px; font-size: 11.5px; }
  .to-top { padding: 10px 13px; font-size: 11px; }
  .data-row { grid-template-columns: auto 1fr; }
}

/* ---------- 14. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  html[data-js] [data-reveal] { opacity: 1; transform: none; }
  .media-caption { transform: none; opacity: 1; }
  .scroll-progress { display: none; }
}