/* ============================================================
   赛酷体育 · 共享层 /assets/site.css
   ============================================================ */

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

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

body, h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
[hidden] { display: none !important; }

/* ---------- 2. 变量 ---------- */
:root {
  --night: #0A1622;
  --ink: #0F2A24;
  --archive: #1B3A34;
  --rail: #21443D;
  --cyan: #35F0CE;
  --amber: #FF9B45;
  --signal: #E0453A;
  --paper: #E9F3F0;
  --mist: #8FA6B4;
  --sheet: #F2FAF7;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --rail-w: 86px;
  --nav-h: 74px;
  --dock-h: 58px;
  --gap: clamp(1rem, 2.4vw, 2rem);
  --cut: 18px;
  --ease: cubic-bezier(.22, .61, .36, 1);

  --line-soft: 1px solid var(--rail);
  --shadow-card: 0 16px 38px rgba(0, 0, 0, .38);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  margin: 0;
  padding-left: var(--rail-w);
  background-color: var(--night);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
}

/* 夜场网格与光晕：全站底层质感 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(33, 68, 61, .34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(33, 68, 61, .26) 1px, transparent 1px),
    radial-gradient(circle at 82% -12%, rgba(53, 240, 206, .10), transparent 58%),
    radial-gradient(circle at 8% 108%, rgba(255, 155, 69, .08), transparent 52%);
  background-size: 96px 96px, 96px 96px, 100% 100%, 100% 100%;
}

/* 极低亮度扫描线 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .5;
  background: repeating-linear-gradient(to bottom,
    rgba(233, 243, 240, .03) 0 1px,
    transparent 1px 4px);
  animation: scan-drift 9s linear infinite;
}

@keyframes scan-drift {
  from { transform: translateY(0); }
  to { transform: translateY(4px); }
}

main {
  position: relative;
  z-index: 1;
  min-height: 62vh;
  padding-top: calc(var(--nav-h) + clamp(1.25rem, 3vw, 2.5rem));
  padding-bottom: clamp(2rem, 5vw, 4rem);
}

h1, h2, h3, h4 { line-height: 1.25; font-weight: 800; letter-spacing: -.008em; }

.numeric,
.nav-version,
.search-input,
.contact-value.numeric,
.stat-value,
.footer-meta {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

::selection { background: var(--cyan); color: var(--night); }

/* ---------- 4. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  top: .6rem;
  left: calc(var(--rail-w) + .6rem);
  z-index: 120;
  padding: .65rem 1.1rem;
  background: var(--cyan);
  color: var(--night);
  font-weight: 700;
  font-size: .9rem;
  text-decoration: none;
  border-radius: 2px;
  transform: translateY(-220%);
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 容器与栅格 ---------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 2.5rem);
}
.container--narrow { max-width: 900px; }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.section { padding-block: clamp(1.75rem, 4vw, 3.25rem); }
.stack > * + * { margin-top: clamp(.75rem, 1.6vw, 1.25rem); }

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--rail) 0 62%, rgba(33, 68, 61, .15) 62% 100%);
}

/* ---------- 6. 文字组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--amber);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--amber);
}

.display-title {
  font-size: clamp(1.9rem, 3.6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.18;
}

.section-title {
  font-size: clamp(1.3rem, 2.1vw, 1.85rem);
  font-weight: 800;
  line-height: 1.3;
}

.section-desc {
  max-width: 40em;
  color: var(--mist);
  font-size: 1rem;
}

.prose {
  max-width: 40em;
  font-size: 1.02rem;
  line-height: 1.78;
}
.prose p + p { margin-top: 1em; }

.annotation {
  font-size: .78rem;
  line-height: 1.7;
  color: var(--mist);
}

.vertical-note {
  writing-mode: vertical-rl;
  font-size: .7rem;
  letter-spacing: .32em;
  color: rgba(143, 166, 180, .78);
}

/* ---------- 7. 面板与数据块 ---------- */
.panel {
  position: relative;
  padding: clamp(1rem, 2.2vw, 1.75rem);
  background: var(--archive);
  border: var(--line-soft);
  border-radius: 2px;
}

.cut-panel {
  --cut: 18px;
  clip-path: polygon(0 0,
    calc(100% - var(--cut)) 0, 100% var(--cut),
    100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(.75rem, 2vw, 1.75rem);
}

.stat { min-width: 88px; }
.stat-value {
  display: inline-block;
  font-size: clamp(1.5rem, 2.6vw, 2.15rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}
.stat-unit {
  margin-left: .2rem;
  font-size: .78rem;
  color: var(--mist);
}
.stat-label {
  display: block;
  margin-top: .25rem;
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--mist);
}

.tag {
  display: inline-block;
  padding: .2rem .55rem;
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--cyan);
  background: rgba(53, 240, 206, .08);
  border: 1px solid rgba(53, 240, 206, .35);
  border-radius: 2px;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 .85rem;
  background: rgba(27, 58, 52, .7);
  border: 1px solid var(--rail);
  color: var(--paper);
  font-size: .84rem;
  text-decoration: none;
  border-radius: 2px;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.chip:hover { border-color: var(--amber); color: var(--amber); }

/* ---------- 8. 按钮与链接 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 46px;
  padding: 0 1.15rem;
  font-size: .95rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  background: rgba(27, 58, 52, .8);
  color: var(--paper);
  cursor: pointer;
  transition: transform .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: var(--amber);
  color: var(--night);
  border-color: var(--amber);
}
.btn--primary:hover { background: #FFAE68; }

.btn--ghost {
  background: transparent;
  color: var(--cyan);
  border-color: rgba(53, 240, 206, .5);
}
.btn--ghost:hover { background: rgba(53, 240, 206, .1); }

.link-more {
  position: relative;
  display: inline-block;
  padding-right: 1.35rem;
  color: var(--cyan);
  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dashed rgba(53, 240, 206, .45);
}
.link-more::after {
  content: "›";
  position: absolute;
  right: .25rem;
  transition: transform .18s var(--ease);
}
.link-more:hover::after { transform: translateX(3px); }

/* ---------- 9. 媒体容器（页面阶段放图） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(140deg, rgba(53, 240, 206, .10), transparent 60%),
    linear-gradient(180deg, var(--archive), var(--ink) 90%);
  border: var(--line-soft);
  border-radius: 2px;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom,
    rgba(10, 22, 34, .22) 0 1px, transparent 1px 3px);
  mix-blend-mode: multiply;
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .92;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--cut {
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

/* ---------- 10. 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  background: var(--sheet);
  border-radius: 2px;
  border: 1px solid rgba(33, 68, 61, .5);
}

.data-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  color: #10231F;
  font-size: .92rem;
}
.data-table th,
.data-table td {
  padding: .7rem .9rem;
  text-align: left;
  border-bottom: 1px solid rgba(33, 68, 61, .22);
}
.data-table th {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #1B3A34;
  background: rgba(53, 240, 206, .16);
}
.data-table tbody tr:hover { background: rgba(53, 240, 206, .1); }

/* ---------- 11. 面包屑 ---------- */
.breadcrumb { margin-bottom: clamp(.75rem, 1.8vw, 1.25rem); }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  font-size: .78rem;
  color: var(--mist);
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: .45rem;
  color: var(--rail);
}
.breadcrumb-link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.breadcrumb-link:hover { color: var(--cyan); border-bottom-color: rgba(53, 240, 206, .5); }

/* ---------- 12. 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   13. 头部
   ============================================================ */
.site-header {
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
}
.site-header > * { pointer-events: auto; }

/* --- 左侧入口轨道 --- */
.brand-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
  padding: 1.1rem .5rem 1.4rem;
  background: linear-gradient(180deg, var(--ink) 0%, #0C211C 58%, var(--night) 100%);
  border-right: 1px solid var(--rail);
  z-index: 92;
}
.brand-rail::after {
  content: "";
  position: absolute;
  top: 0;
  right: -1px;
  bottom: 0;
  width: 6px;
  background: repeating-linear-gradient(to bottom,
    rgba(53, 240, 206, .55) 0 2px, transparent 2px 14px);
  opacity: .5;
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .55rem;
  text-decoration: none;
  color: var(--paper);
}
.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--cyan);
  color: var(--night);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .92rem;
  letter-spacing: .04em;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}
.brand-name {
  writing-mode: vertical-rl;
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: .3em;
}
.brand-latin {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .34em;
  color: var(--mist);
}
.brand-tagline {
  writing-mode: vertical-rl;
  font-size: .72rem;
  letter-spacing: .26em;
  color: var(--mist);
}
.rail-note {
  writing-mode: vertical-rl;
  font-size: .64rem;
  letter-spacing: .3em;
  color: rgba(143, 166, 180, .55);
}
.rail-version {
  margin-top: auto;
  writing-mode: vertical-rl;
  font-size: .64rem;
  letter-spacing: .2em;
  color: var(--amber);
}

/* --- 顶部导航条 --- */
.nav-bar {
  position: fixed;
  top: 0;
  left: var(--rail-w);
  right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: clamp(.5rem, 1.4vw, 1.25rem);
  padding-inline: clamp(.85rem, 2.4vw, 2rem);
  background: rgba(10, 22, 34, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rail);
  z-index: 91;
}

.site-nav { margin-left: auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: .2rem;
}
.nav-item { display: block; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 .85rem;
  font-size: .94rem;
  font-weight: 600;
  color: var(--paper);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  left: .85rem;
  right: .85rem;
  bottom: 6px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .2s var(--ease);
}
.nav-link:hover {
  color: var(--cyan);
  background: rgba(53, 240, 206, .07);
}
.nav-link:hover::before { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(53, 240, 206, .1);
  border-color: rgba(53, 240, 206, .45);
}
.nav-link[aria-current="page"]::before {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--cyan), var(--amber));
}

.nav-utility {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding-left: clamp(.6rem, 1.6vw, 1.25rem);
  border-left: 1px solid var(--rail);
}

.search-field {
  display: flex;
  align-items: center;
  gap: .5rem;
}
.search-label {
  font-size: .68rem;
  letter-spacing: .18em;
  color: var(--mist);
  white-space: nowrap;
}
.search-input {
  width: 9.5rem;
  min-height: 40px;
  padding: 0 .6rem;
  background: rgba(27, 58, 52, .6);
  border: 1px solid var(--rail);
  border-radius: 2px;
  color: var(--paper);
  font-size: .86rem;
}
.search-input::placeholder { color: rgba(143, 166, 180, .8); }
.search-input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 1px;
}

.nav-version {
  padding: .25rem .55rem;
  font-size: .7rem;
  color: var(--amber);
  border: 1px dashed rgba(255, 155, 69, .45);
  border-radius: 2px;
  white-space: nowrap;
}

/* --- 移动导航按钮 --- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  min-height: 46px;
  min-width: 46px;
  padding: 0 .9rem;
  background: rgba(53, 240, 206, .1);
  color: var(--cyan);
  border: 1px solid rgba(53, 240, 206, .45);
  border-radius: 2px;
  font-size: .86rem;
  font-weight: 700;
  cursor: pointer;
}
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color .2s var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .2s var(--ease);
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

.site-header[data-open] .nav-toggle-bars { background: transparent; }
.site-header[data-open] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

/* --- 滚动进度 --- */
.scroll-meter {
  position: fixed;
  top: calc(var(--nav-h) - 2px);
  left: var(--rail-w);
  right: 0;
  height: 2px;
  background: rgba(33, 68, 61, .55);
  pointer-events: none;
  z-index: 93;
}
.scroll-meter-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .12s linear;
}

/* ============================================================
   14. 页脚
   ============================================================ */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(2.5rem, 6vw, 5rem);
  padding: clamp(1.75rem, 4vw, 3rem) 0 1.5rem;
  background: linear-gradient(180deg, var(--ink) 0%, #0B211C 55%, var(--night) 100%);
  border-top: 1px solid var(--rail);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--cyan) 0 16%, var(--rail) 16% 58%,
    var(--amber) 58% 70%, var(--rail) 70% 100%);
  opacity: .8;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) repeat(3, minmax(110px, .8fr)) minmax(260px, 1.35fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.footer-brand { display: flex; flex-direction: column; gap: .75rem; }
.footer-lockup {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  text-decoration: none;
  color: var(--paper);
}
.footer-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--cyan);
  color: var(--night);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .8rem;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}
.footer-word { font-weight: 800; letter-spacing: .08em; }
.footer-sign {
  max-width: 26em;
  font-size: .92rem;
  color: var(--mist);
}
.footer-meta {
  font-size: .72rem;
  color: rgba(143, 166, 180, .72);
}

.footer-col-title {
  margin-bottom: .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--amber);
}
.footer-list { display: flex; flex-direction: column; gap: .35rem; }
.footer-link {
  display: inline-block;
  min-height: 32px;
  font-size: .9rem;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.footer-link:hover {
  color: var(--cyan);
  border-bottom-color: rgba(53, 240, 206, .5);
}

.footer-contact { display: flex; flex-direction: column; gap: .5rem; }
.contact-list { display: flex; flex-direction: column; gap: .45rem; }
.contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem;
  font-size: .88rem;
}
.contact-key {
  min-width: 4.5em;
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--mist);
}
.contact-value { color: var(--paper); }
.footer-email { word-break: break-all; }

.copy-btn {
  min-height: 32px;
  padding: 0 .6rem;
  background: transparent;
  color: var(--cyan);
  border: 1px solid rgba(53, 240, 206, .45);
  border-radius: 2px;
  font-size: .74rem;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}
.copy-btn:hover { background: rgba(53, 240, 206, .12); }

.copy-status {
  min-height: 1.2em;
  font-size: .74rem;
  color: var(--amber);
}
.footer-note {
  margin-top: .35rem;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--mist);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
  padding-top: 1rem;
  border-top: 1px solid var(--rail);
  font-size: .78rem;
  color: var(--mist);
}
.legal-item--dim { color: rgba(143, 166, 180, .72); }

/* ============================================================
   15. 响应式
   ============================================================ */
@media (max-width: 1279px) {
  .footer-grid {
    grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(100px, 1fr));
  }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 1099px) {
  .nav-version { display: none; }
}

/* --- 平板 / 手机：左轨折叠为底部横条 --- */
@media (max-width: 1023px) {
  body { padding-left: 0; }

  main {
    padding-top: clamp(1.25rem, 4vw, 2rem);
    padding-bottom: calc(var(--dock-h) + 2.25rem);
  }

  .skip-link { left: .6rem; }

  .brand-rail {
    top: auto;
    bottom: 0;
    left: 0;
    right: auto;
    width: auto;
    height: var(--dock-h);
    flex-direction: row;
    align-items: center;
    gap: .55rem;
    padding: 0 .85rem;
    border-right: 1px solid var(--rail);
    border-top: 1px solid var(--rail);
    z-index: 95;
  }
  .brand-rail::after { display: none; }
  .brand-lockup { flex-direction: row; gap: .5rem; }
  .brand-mark { width: 32px; height: 32px; font-size: .74rem; }
  .brand-name { writing-mode: horizontal-tb; font-size: .92rem; letter-spacing: .18em; }
  .brand-latin,
  .brand-tagline,
  .rail-note,
  .rail-version { display: none; }

  .nav-bar {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--dock-h);
    justify-content: flex-end;
    padding-inline: .75rem;
    padding-left: 9.5rem;
    background: rgba(15, 42, 36, .97);
    backdrop-filter: blur(8px);
    border-top: 1px solid var(--rail);
    border-bottom: 0;
    z-index: 94;
  }

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

  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: var(--dock-h);
    max-height: 66vh;
    overflow-y: auto;
    margin-left: 0;
    padding: .85rem clamp(.75rem, 4vw, 1.5rem) 1.1rem;
    background: var(--ink);
    border-top: 1px solid var(--rail);
    box-shadow: 0 -18px 40px rgba(0, 0, 0, .45);
    transform: translateY(115%);
    opacity: 0;
    visibility: hidden;
    transition: transform .22s var(--ease), opacity .22s var(--ease), visibility .22s;
  }
  .site-header[data-open] .site-nav {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list { flex-direction: column; align-items: stretch; gap: .4rem; }
  .nav-link {
    width: 100%;
    justify-content: space-between;
    padding-inline: .9rem;
    background: rgba(27, 58, 52, .55);
    border-color: var(--rail);
  }
  .nav-link::before { left: .9rem; right: .9rem; }
  .nav-link::after {
    content: "›";
    font-family: var(--font-mono);
    color: var(--mist);
  }
  .nav-link[aria-current="page"]::after { color: var(--cyan); }

  .nav-utility { display: none; }

  .scroll-meter {
    top: 0;
    left: 0;
  }

  .site-footer { padding-bottom: calc(var(--dock-h) + 2rem); }
}

@media (max-width: 1023px) {
  .col-3, .col-4, .col-5 { grid-column: span 6; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }

  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9 { grid-column: span 12; }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand,
  .footer-contact { grid-column: 1 / -1; }

  .footer-legal { flex-direction: column; }

  .stat-row { gap: 1rem; }
  .stat { min-width: 72px; }
}

/* --- 减弱动效 --- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body::after { animation: none; }

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

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .scroll-meter-fill { transition: none; }
}