/* ============================================================
   非凡体育 · /assets/site.css
   外壳：左侧品牌轨道 + 顶部命令栏 + 四段错位页脚
   ============================================================ */

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

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

body { margin: 0; }

h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }

ul, ol { padding: 0; list-style: none; }

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

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

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

:where(a, button, [tabindex], summary):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 6px;
}

::selection {
  background: rgba(56, 242, 192, 0.28);
  color: #eafff9;
}

/* ---------- tokens ---------- */
:root {
  --ink: #06120F;
  --ink-2: #0C211C;
  --ink-3: #16332C;
  --line: #16332C;
  --line-soft: rgba(22, 51, 44, 0.72);

  --cyan: #38F2C0;
  --cyan-soft: #9BFFE4;
  --orange: #FF5A2B;
  --indigo: #2B1B4D;
  --wine: #4A1526;

  --text: #E9F5F1;
  --muted: #8FA8A0;

  --rail-w: 88px;
  --bar-h: 56px;
  --pad: clamp(16px, 4vw, 40px);
  --maxw: 1280px;

  --r-lg: 28px;
  --r-md: 20px;
  --r-sm: 12px;

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Barlow Condensed", "DIN Condensed", ui-monospace, SFMono-Regular, Menlo, monospace;

  --ease: cubic-bezier(0.22, 0.68, 0.32, 1);
  --dur: 0.16s;
}

/* ---------- base ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 620px at 88% -12%, rgba(43, 27, 77, 0.58), transparent 68%),
    radial-gradient(840px 520px at -10% 108%, rgba(74, 21, 38, 0.42), transparent 62%);
  background-repeat: no-repeat;
  padding-top: var(--bar-h);
  padding-left: 0;
}

@media (min-width: 901px) {
  body { padding-left: var(--rail-w); }
}

@media (max-width: 900px) {
  body { padding-top: calc(var(--bar-h) + 44px); }
}

@media (max-width: 900px) {
  body.is-nav-open { overflow: hidden; }
}

#main-content {
  display: block;
  scroll-margin-top: calc(var(--bar-h) + 24px);
  outline: none;
}

/* ---------- typography utilities ---------- */
.display {
  font-size: clamp(44px, 7.5vw, 132px);
  font-weight: 200;
  line-height: 0.94;
  letter-spacing: -0.03em;
}

.section-title {
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 700;
  line-height: 1.26;
  letter-spacing: -0.01em;
}

.lede {
  max-width: 34em;
  font-size: clamp(16px, 1.35vw, 18px);
  color: var(--muted);
}

.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.numeral {
  font-family: var(--font-num);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.01em;
  line-height: 1;
}

/* ---------- layout utilities ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section {
  padding-block: clamp(48px, 7vw, 96px);
}

.section--indigo {
  background: linear-gradient(180deg, rgba(43, 27, 77, 0.72), rgba(43, 27, 77, 0.16) 82%, transparent);
}

.section--wine {
  background: linear-gradient(180deg, rgba(74, 21, 38, 0.66), rgba(74, 21, 38, 0.14) 82%, transparent);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 32px);
}

.stack > * + * { margin-top: 1.25rem; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: var(--orange);
  border-color: transparent;
  color: #180703;
  font-weight: 700;
}

.btn--primary:hover {
  background: #ff7247;
  box-shadow: 0 10px 26px rgba(255, 90, 43, 0.28);
}

.btn--ghost {
  background: rgba(56, 242, 192, 0.07);
  border-color: rgba(56, 242, 192, 0.34);
  color: var(--cyan-soft);
}

.btn--ghost:hover {
  background: rgba(56, 242, 192, 0.14);
  border-color: var(--cyan);
}

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(12, 33, 28, 0.5);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}

button.tag { min-height: 36px; }

.tag:hover {
  border-color: rgba(56, 242, 192, 0.4);
  color: var(--cyan-soft);
}

.tag[aria-pressed="true"],
.tag.is-active {
  background: var(--orange);
  border-color: transparent;
  color: #180703;
  font-weight: 700;
}

/* ---------- panel ---------- */
.panel {
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(12, 33, 28, 0.96), rgba(6, 18, 15, 0.94));
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.panel:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 242, 192, 0.32);
}

/* ---------- figure（页面阶段的图片容器） ---------- */
.figure {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background:
    radial-gradient(120% 90% at 18% 0%, rgba(56, 242, 192, 0.14), transparent 60%),
    linear-gradient(160deg, #0C211C, #06120F);
}

.figure > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.82) contrast(1.12) saturate(0.95);
}

.figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    linear-gradient(to right, rgba(56, 242, 192, 0.12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(56, 242, 192, 0.12) 1px, transparent 1px);
  background-size: 44px 44px;
}

.figure--wide { aspect-ratio: 21 / 9; }
.figure--tall { aspect-ratio: 3 / 4; }

.figure__caption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 6px 12px;
  border: 1px solid rgba(56, 242, 192, 0.3);
  border-radius: 999px;
  background: rgba(6, 18, 15, 0.74);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

/* ---------- breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.breadcrumb__link { color: var(--muted); transition: color var(--dur) var(--ease); }
.breadcrumb__link:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--ink-3); }

/* ---------- strip（横向滑动带） ---------- */
.strip {
  display: flex;
  gap: clamp(12px, 1.6vw, 20px);
  overflow-x: auto;
  padding-bottom: 10px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: rgba(56, 242, 192, 0.35) transparent;
}

.strip > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.strip.is-dragging { cursor: grabbing; scroll-snap-type: none; }

.strip::-webkit-scrollbar { height: 6px; }
.strip::-webkit-scrollbar-thumb {
  background: rgba(56, 242, 192, 0.3);
  border-radius: 999px;
}

/* ---------- 状态点 ---------- */
.status-dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(56, 242, 192, 0.9);
}

/* ---------- 进场显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  z-index: 90;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 120;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--cyan);
  color: #04120E;
  font-size: 13px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
}

/* --- 品牌轨道 --- */
.brand-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 96;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: var(--rail-w);
  padding: 18px 0 16px;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, #2B1B4D 0%, #1C1236 46%, #0A1B16 78%, #06120F 100%);
}

.brand-sign {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  border-radius: 14px;
}

.brand-sign__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 242, 192, 0.14), 0 0 14px rgba(56, 242, 192, 0.7);
}

.brand-sign__name {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.3em;
  line-height: 1;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.brand-sign:hover .brand-sign__name { color: var(--cyan-soft); }

.brand-sign__sub {
  writing-mode: vertical-rl;
  font-size: 9px;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  color: var(--muted);
}

/* --- 轨道导航（桌面） --- */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: stretch;
  width: 100%;
  overflow-y: auto;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar { width: 0; }

.site-nav__list {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 2px;
  width: 100%;
  padding-inline: 4px;
}

.site-nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 52px;
  padding: 8px 4px;
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__link:hover {
  color: var(--cyan-soft);
  background: rgba(56, 242, 192, 0.07);
}

.site-nav__idx {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--muted);
  opacity: 0.85;
}

.site-nav__text {
  font-size: 11px;
  line-height: 1.34;
  letter-spacing: 0.04em;
}

.site-nav__tick {
  position: absolute;
  left: 3px;
  top: 50%;
  width: 2px;
  height: 0;
  border-radius: 2px;
  background: var(--orange);
  transform: translateY(-50%);
  opacity: 0;
  transition: height var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-nav__link[aria-current="page"] {
  color: var(--text);
  background: rgba(56, 242, 192, 0.09);
}

.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--cyan); opacity: 1; }

.site-nav__link[aria-current="page"] .site-nav__tick {
  height: 20px;
  opacity: 1;
}

/* --- 轨道底部入口 --- */
.rail-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  min-height: 132px;
  padding: 12px 0;
  border-radius: 999px;
  background: var(--orange);
  color: #180703;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  writing-mode: vertical-rl;
  text-orientation: upright;
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.rail-cta:hover {
  background: #ff7247;
  box-shadow: 0 0 26px rgba(255, 90, 43, 0.4);
}

/* --- 移动开关 --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(12, 33, 28, 0.8);
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --- 命令栏 --- */
.command-bar {
  position: fixed;
  top: 0;
  left: var(--rail-w);
  right: 0;
  z-index: 94;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 24px);
  height: var(--bar-h);
  padding: 0 clamp(12px, 2vw, 24px);
  border-bottom: 1px solid var(--line);
  background: rgba(6, 18, 15, 0.84);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.command-bar__now {
  display: flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.command-bar__num {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.command-bar__total {
  font-family: var(--font-num);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.command-bar__label {
  margin-left: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.04em;
}

.quick-jump {
  display: flex;
  align-items: center;
  gap: 2px;
  min-width: 0;
  overflow: hidden;
}

.quick-jump__link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.quick-jump__link:hover {
  color: var(--cyan);
  border-color: rgba(56, 242, 192, 0.32);
  background: rgba(56, 242, 192, 0.07);
}

.command-bar__status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: auto;
  padding: 6px 12px;
  border: 1px solid rgba(56, 242, 192, 0.22);
  border-radius: 999px;
  background: rgba(56, 242, 192, 0.06);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan-soft);
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.command-bar__status.is-reading {
  color: var(--muted);
  border-color: var(--line);
  background: rgba(12, 33, 28, 0.66);
}

.command-bar__status.is-reading .status-dot {
  background: var(--muted);
  box-shadow: none;
}

.command-bar__cta {
  flex: none;
  min-height: 38px;
  padding: 0 18px;
  font-size: 13px;
}

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(56, 242, 192, 0.1);
  overflow: hidden;
}

.scroll-meter__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transition: width 0.12s linear;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 120px);
  padding: clamp(28px, 4vw, 56px) 0 clamp(20px, 3vw, 32px);
  border-top: 1px solid rgba(56, 242, 192, 0.42);
  background:
    linear-gradient(180deg, rgba(43, 27, 77, 0.92) 0%, rgba(24, 16, 44, 0.9) 34%, #040E0C 100%);
}

.footer-rule {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(24px, 4vw, 48px);
}

.footer-rule__num {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  white-space: nowrap;
}

.footer-rule__line {
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, rgba(56, 242, 192, 0.85), rgba(56, 242, 192, 0.04));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.1fr;
  gap: clamp(20px, 3vw, 48px);
  align-items: start;
}

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

.footer-col--offset { margin-top: clamp(0px, 2vw, 28px); }

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-col__title::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  flex: none;
}

.footer-brand__sign {
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 200;
  letter-spacing: 0.1em;
  color: var(--text);
}

.footer-brand__line {
  max-width: 24em;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.footer-brand__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.footer-list {
  display: grid;
  gap: 4px;
}

.footer-list__link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--muted);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer-list__link:hover {
  color: var(--cyan-soft);
  transform: translateX(3px);
}

.footer-contact {
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.footer-contact__row {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.footer-contact__key {
  flex: none;
  min-width: 32px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.footer-contact__val {
  color: var(--text);
  font-size: 13px;
  line-height: 1.6;
  word-break: break-word;
}

.footer-note {
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  line-height: 1.72;
  color: var(--muted);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  margin-top: clamp(28px, 4vw, 48px);
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  color: var(--muted);
}

.footer-base__links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.footer-base__link {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.footer-base__link:hover { color: var(--cyan); }

.footer-base__legal {
  font-family: var(--font-num);
  letter-spacing: 0.1em;
  color: var(--muted);
}

.footer-base__copy {
  color: var(--muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1180px) {
  .quick-jump__link:nth-child(3) { display: none; }
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-col--offset { margin-top: 0; }
}

@media (max-width: 900px) {
  /* 品牌轨道收为 56px 顶栏 */
  .brand-rail {
    left: 0;
    right: 0;
    bottom: auto;
    top: 0;
    width: auto;
    height: var(--bar-h);
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    padding: 0 12px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(110deg, #2B1B4D 0%, #1A1030 54%, #0A1B16 100%);
  }

  .brand-sign {
    flex-direction: row;
    align-items: center;
    gap: 8px;
    padding: 6px 4px;
  }

  .brand-sign__name {
    writing-mode: horizontal-tb;
    font-size: 15px;
    letter-spacing: 0.2em;
  }

  .brand-sign__sub { display: none; }

  .rail-cta {
    width: auto;
    min-height: 36px;
    min-width: 0;
    margin-left: auto;
    padding: 0 14px;
    writing-mode: horizontal-tb;
    font-size: 12px;
    letter-spacing: 0.06em;
  }

  .nav-toggle { display: flex; }

  /* 导航变为下拉面板 */
  .site-nav {
    position: fixed;
    top: calc(var(--bar-h) + 44px);
    left: 0;
    right: 0;
    width: auto;
    max-height: calc(100dvh - (var(--bar-h) + 44px));
    padding: 12px 12px 20px;
    overflow-y: auto;
    display: block;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, #1A1030 0%, #0A1B16 62%, #06120F 100%);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--dur) var(--ease),
                transform var(--dur) var(--ease),
                visibility var(--dur) var(--ease);
    z-index: 95;
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-nav__list {
    display: block;
    width: auto;
    padding-inline: 0;
  }

  .site-nav__item + .site-nav__item {
    border-top: 1px solid rgba(22, 51, 44, 0.85);
  }

  .site-nav__link {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    width: 100%;
    min-height: 52px;
    padding: 0 10px;
    border-radius: 12px;
    text-align: left;
  }

  .site-nav__idx {
    min-width: 22px;
    font-size: 11px;
    color: var(--cyan);
  }

  .site-nav__text {
    font-size: 15px;
    letter-spacing: 0.04em;
    color: var(--text);
  }

  .site-nav__tick {
    position: static;
    width: 0;
    height: 2px;
    transform: none;
    opacity: 0;
    transition: width var(--dur) var(--ease), opacity var(--dur) var(--ease);
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(56, 242, 192, 0.1);
    box-shadow: inset 0 0 0 1px rgba(56, 242, 192, 0.28);
  }

  .site-nav__link[aria-current="page"] .site-nav__tick {
    width: 22px;
    height: 2px;
    opacity: 1;
  }

  /* 命令栏转为第二层窄条 */
  .command-bar {
    top: var(--bar-h);
    left: 0;
    right: 0;
    height: 44px;
    gap: 8px;
    padding: 0 12px;
  }

  .quick-jump { display: none; }

  .command-bar__label { font-size: 11px; margin-left: 4px; }
  .command-bar__num { font-size: 13px; }

  .command-bar__status {
    margin-left: auto;
    padding: 4px 10px;
    font-size: 10px;
    letter-spacing: 0.1em;
  }

  .command-bar__cta {
    min-height: 32px;
    padding: 0 14px;
    font-size: 12px;
  }
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .footer-brand__line { max-width: none; }
}

@media (max-width: 420px) {
  .command-bar__status-text { display: none; }
  .command-bar__status { padding: 6px; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .btn:hover,
  .panel:hover,
  .footer-list__link:hover { transform: none; }

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