/* ==========================================================================
   PA視訊站 — 共享样式 /assets/site.css
   夜间媒体档案库 · 堆叠面板 · 霓虹信号
   ========================================================================== */

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

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

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

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

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

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

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

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #06101E;
  --panel: #0E2138;
  --panel-2: #16324F;
  --line: #1E3A57;
  --cyan: #2FE3EA;
  --cyan-soft: #9BF6F7;
  --orange: #FF7A3D;
  --orange-soft: #FFB38A;
  --lime: #C8FF4D;
  --text: #C9D8E8;
  --white: #F4FAFF;
  --muted: #8FA5BC;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --shell: 1320px;
  --gutter: clamp(20px, 4vw, 56px);
  --radius: 12px;
  --radius-sm: 9px;
  --shadow-lift: 0 18px 40px -22px rgba(0, 0, 0, .85);
  --ease: cubic-bezier(.4, .1, .2, 1);
}

/* ---------- 3. Base typography ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 560px at 88% -12%, rgba(47, 227, 234, .10), transparent 62%),
    radial-gradient(900px 520px at 4% 108%, rgba(255, 122, 61, .07), transparent 60%),
    linear-gradient(180deg, #06101E 0%, #050D18 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: rgba(47, 227, 234, .28);
  color: var(--white);
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 5px;
}

/* ---------- 4. Layout primitives ---------- */
.pa-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.pa-section {
  padding-block: clamp(44px, 6vw, 92px);
  border-top: 1px solid var(--line);
}

.pa-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.pa-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--cyan);
  text-transform: uppercase;
}

.pa-eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--cyan);
}

.pa-h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--white);
}

.pa-h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--white);
}

.pa-h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.35;
  color: var(--white);
}

.pa-lead {
  font-size: clamp(15.5px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--text);
  max-width: 40ch;
}

.pa-text {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text);
  max-width: 42ch;
}

.pa-annot {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .34em;
  color: var(--muted);
  text-transform: uppercase;
}

.pa-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
  color: var(--cyan-soft);
}

.pa-rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(24px, 3vw, 40px);
}

.pa-reading {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
}

.pa-reading > * + * { margin-top: 1em; }

/* ---------- 5. Grid ---------- */
.pa-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 24px);
}

.pa-col { grid-column: span 12; min-width: 0; }

.pa-grid--7-5 > :nth-child(1) { grid-column: span 7; }
.pa-grid--7-5 > :nth-child(2) { grid-column: span 5; }
.pa-grid--8-4 > :nth-child(1) { grid-column: span 8; }
.pa-grid--8-4 > :nth-child(2) { grid-column: span 4; }
.pa-grid--9-3 > :nth-child(1) { grid-column: span 9; }
.pa-grid--9-3 > :nth-child(2) { grid-column: span 3; }

@media (max-width: 900px) {
  .pa-grid--7-5 > *,
  .pa-grid--8-4 > *,
  .pa-grid--9-3 > * { grid-column: span 12 !important; }
}

/* ---------- 6. Buttons ---------- */
.pa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: .02em;
  border: 1px solid transparent;
  transition: background-color .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .18s var(--ease);
}

.pa-btn--primary {
  background: var(--orange);
  color: #1A0C04;
  box-shadow: 0 10px 26px -14px rgba(255, 122, 61, .9);
}

.pa-btn--primary:hover {
  background: var(--orange-soft);
  transform: translateY(-1px);
}

.pa-btn--primary:active { transform: translateY(0); }

.pa-btn--ghost {
  border-color: var(--line);
  color: var(--text);
  background: rgba(22, 50, 79, .42);
}

.pa-btn--ghost:hover {
  border-color: rgba(47, 227, 234, .48);
  color: var(--cyan-soft);
  background: rgba(47, 227, 234, .08);
}

.pa-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background: var(--orange);
  color: #1A0C04;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  box-shadow: 0 10px 24px -14px rgba(255, 122, 61, .95);
  transition: background-color .18s var(--ease), transform .18s var(--ease);
}

.pa-cta::after {
  content: "";
  width: 6px;
  height: 6px;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-left: 2px;
}

.pa-cta:hover {
  background: var(--orange-soft);
  transform: translateY(-1px);
}

.pa-cta:active { transform: translateY(0); }

/* ---------- 7. Tags / breadcrumbs ---------- */
.pa-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--muted);
  white-space: nowrap;
}

.pa-tag--cyan {
  border-color: rgba(47, 227, 234, .42);
  background: rgba(47, 227, 234, .1);
  color: var(--cyan-soft);
}

.pa-tag--orange {
  border-color: rgba(255, 122, 61, .44);
  background: rgba(255, 122, 61, .12);
  color: var(--orange-soft);
}

.pa-tag--lime {
  border-color: rgba(200, 255, 77, .4);
  background: rgba(200, 255, 77, .1);
  color: #DCFFA0;
}

.pa-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--muted);
}

.pa-crumbs__link {
  color: var(--muted);
  transition: color .16s var(--ease);
}

.pa-crumbs__link:hover { color: var(--cyan-soft); }

.pa-crumbs__sep { color: var(--line); }

/* ---------- 8. Cards / TOC / frames ---------- */
.pa-card {
  position: relative;
  padding: clamp(18px, 2.2vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color .18s var(--ease), background-color .18s var(--ease),
              transform .18s var(--ease);
}

.pa-card--lift { box-shadow: var(--shadow-lift); }

.pa-card:hover {
  border-color: rgba(47, 227, 234, .4);
  background: var(--panel-2);
}

.pa-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16.5px;
  color: var(--white);
  line-height: 1.4;
}

.pa-card__meta {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.pa-toc {
  display: grid;
  gap: 2px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.pa-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  color: var(--text);
  border-left: 2px solid transparent;
  transition: background-color .16s var(--ease), color .16s var(--ease),
              border-color .16s var(--ease);
}

.pa-toc__link:hover {
  background: var(--panel-2);
  color: var(--white);
}

.pa-toc__link[data-active="true"] {
  background: rgba(47, 227, 234, .1);
  border-left-color: var(--cyan);
  color: var(--cyan-soft);
}

.pa-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(90deg, rgba(30, 58, 87, .55) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(0deg, rgba(30, 58, 87, .55) 0 1px, transparent 1px 34px),
    linear-gradient(150deg, rgba(22, 50, 79, .92), rgba(14, 33, 56, .92));
  aspect-ratio: 16 / 10;
  box-shadow: var(--shadow-lift);
}

.pa-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(120% 90% at 82% 6%, rgba(47, 227, 234, .16), transparent 58%);
}

.pa-frame img,
.pa-frame picture,
.pa-frame svg {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pa-frame--wide { aspect-ratio: 21 / 9; }
.pa-frame--tall { aspect-ratio: 4 / 5; }
.pa-frame--square { aspect-ratio: 1 / 1; }

.pa-frame__cap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(6, 16, 30, .82);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--cyan-soft);
}

/* ---------- 9. Skip link ---------- */
.pa-skip {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: 0 0 10px 10px;
  background: var(--cyan);
  color: #04121A;
  font-size: 14px;
  font-weight: 700;
  transition: top .18s var(--ease);
}

.pa-skip:focus-visible {
  top: 0;
  outline-offset: 2px;
}

/* ---------- 10. Header ---------- */
.pa-header {
  position: sticky;
  top: 0;
  z-index: 60;
  color: var(--white);
  background: linear-gradient(180deg, rgba(6, 16, 30, .97), rgba(6, 16, 30, .89));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.pa-progress {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: rgba(30, 58, 87, .7);
  overflow: hidden;
}

.pa-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  will-change: transform;
}

.pa-topbar { padding-top: 2px; }

.pa-topbar__inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  min-height: 64px;
  padding-block: 10px;
}

.pa-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}

.pa-brand__mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid rgba(47, 227, 234, .48);
  border-radius: var(--radius-sm);
  background: linear-gradient(150deg, rgba(47, 227, 234, .26), rgba(47, 227, 234, .04));
}

.pa-brand__mark::before {
  content: "";
  width: 0;
  height: 0;
  margin-left: 2px;
  border-left: 10px solid var(--cyan);
  border-top: 6.5px solid transparent;
  border-bottom: 6.5px solid transparent;
  filter: drop-shadow(0 0 6px rgba(47, 227, 234, .8));
}

.pa-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.pa-brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: .02em;
  color: var(--white);
}

.pa-brand__sig {
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: .13em;
  color: var(--muted);
}

.pa-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px 6px 11px;
  border: 1px solid rgba(200, 255, 77, .3);
  border-radius: 999px;
  background: rgba(200, 255, 77, .07);
  font-size: 12px;
  letter-spacing: .06em;
  color: #DCFFA0;
  white-space: nowrap;
}

.pa-status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(200, 255, 77, .16);
  animation: pa-pulse 2.6s ease-in-out infinite;
}

.pa-utility {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.pa-utility__link {
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text);
  transition: color .16s var(--ease), background-color .16s var(--ease),
              border-color .16s var(--ease);
}

.pa-utility__link:hover {
  color: var(--cyan-soft);
  border-color: rgba(47, 227, 234, .34);
  background: rgba(47, 227, 234, .08);
}

.pa-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  letter-spacing: .04em;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.pa-navtoggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.pa-navtoggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s var(--ease);
}

.pa-navwrap {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 33, 56, .92), rgba(6, 16, 30, .86));
}

.pa-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 24px);
  min-height: 56px;
  padding-block: 8px;
}

.pa-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1 1 auto;
  min-width: 0;
  flex-wrap: wrap;
}

.pa-nav__item { min-width: 0; }

.pa-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text);
  transition: background-color .16s var(--ease), color .16s var(--ease),
              box-shadow .16s var(--ease);
}

.pa-nav__num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--muted);
  transition: color .16s var(--ease);
}

.pa-nav__label { white-space: nowrap; }

.pa-nav__link:hover {
  background: var(--panel-2);
  color: var(--white);
}

.pa-nav__link:hover .pa-nav__num { color: var(--cyan); }

.pa-nav__link[aria-current="page"] {
  background: rgba(47, 227, 234, .1);
  color: var(--cyan-soft);
  box-shadow: inset 0 0 0 1px rgba(47, 227, 234, .38);
}

.pa-nav__link[aria-current="page"] .pa-nav__num { color: var(--cyan); }

.pa-nav__cta { flex: 0 0 auto; }

/* ---------- 11. Footer ---------- */
.pa-footer {
  margin-top: clamp(40px, 6vw, 80px);
  border-top: 1px solid var(--line);
  color: var(--text);
  background: linear-gradient(180deg, rgba(14, 33, 56, .58), rgba(6, 16, 30, 1));
}

.pa-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, .8fr) minmax(0, .8fr) minmax(0, 1.15fr);
  gap: clamp(24px, 3vw, 48px);
  padding-block: clamp(36px, 5vw, 64px);
}

.pa-footer__brand { min-width: 0; }

.pa-footer__mark {
  display: block;
  width: 30px;
  height: 10px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan) 0 42%, var(--orange) 42% 100%);
  box-shadow: 0 0 18px -6px rgba(47, 227, 234, .8);
}

.pa-footer__name {
  margin-top: 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.15;
  letter-spacing: .01em;
  color: var(--white);
}

.pa-footer__summary {
  margin-top: 14px;
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.pa-footer__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 9px 16px;
  border: 1px solid rgba(255, 122, 61, .45);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--orange-soft);
  transition: background-color .16s var(--ease), color .16s var(--ease),
              border-color .16s var(--ease);
}

.pa-footer__cta:hover {
  background: rgba(255, 122, 61, .13);
  border-color: var(--orange);
  color: #FFD6C2;
}

.pa-footer__group { min-width: 0; }

.pa-footer__title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.pa-footer__title::before {
  content: "";
  width: 12px;
  height: 1px;
  background: var(--cyan);
}

.pa-footer__list {
  display: grid;
  gap: 10px;
}

.pa-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 0;
  font-size: 14px;
  color: var(--text);
  transition: color .16s var(--ease), gap .18s var(--ease);
}

.pa-footer__link::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--cyan);
  transition: width .18s var(--ease), margin-right .18s var(--ease);
}

.pa-footer__link:hover { color: var(--cyan-soft); }

.pa-footer__link:hover::before {
  width: 12px;
  margin-right: 8px;
}

.pa-footer__meta {
  display: grid;
  gap: 13px;
}

.pa-footer__meta-item {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.pa-footer__meta-key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--muted);
}

.pa-footer__meta-val {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--white);
  overflow-wrap: anywhere;
}

.pa-footer__meta-val--mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--cyan-soft);
}

.pa-footer__base {
  border-top: 1px solid var(--line);
  background: rgba(6, 16, 30, .66);
}

.pa-footer__baseinner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding-block: 18px;
  font-size: 12.5px;
  color: var(--muted);
}

.pa-footer__copy {
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

.pa-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-left: auto;
}

.pa-footer__legal-link {
  color: var(--muted);
  transition: color .16s var(--ease);
}

.pa-footer__legal-link:hover { color: var(--cyan-soft); }

.pa-footer__icp {
  font-family: var(--font-mono);
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 12. Reveal (JS 写 html.pa-js) ---------- */
.pa-js [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .46s var(--ease), transform .46s var(--ease);
}

.pa-js [data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* ---------- 13. Motion ---------- */
@keyframes pa-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 3px rgba(200, 255, 77, .16); }
  50%      { opacity: .5; box-shadow: 0 0 0 6px rgba(200, 255, 77, .05); }
}

@keyframes pa-drop {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 14. Responsive ---------- */
@media (max-width: 1080px) {
  .pa-nav__num { display: none; }
  .pa-nav__link { padding: 9px 11px; font-size: 14px; }
}

@media (max-width: 900px) {
  .pa-status { display: none; }
  .pa-brand__sig { display: none; }
}

@media (max-width: 860.98px) {
  .pa-topbar__inner { min-height: 58px; gap: 10px; }
  .pa-utility { display: none; }
  .pa-navtoggle { display: inline-flex; }

  .pa-header[data-open="true"] .pa-navtoggle {
    color: var(--cyan-soft);
    border-color: rgba(47, 227, 234, .5);
  }

  .pa-header[data-open="true"] .pa-navtoggle__bars span:first-child {
    transform: translateY(3px) rotate(45deg);
  }

  .pa-header[data-open="true"] .pa-navtoggle__bars span:last-child {
    transform: translateY(-3px) rotate(-45deg);
  }

  /* 无 JS 时导航默认可见；JS 加载后按需收起 */
  .pa-navwrap { display: block; }

  .pa-js .pa-navwrap { display: none; }

  .pa-js .pa-header[data-open="true"] .pa-navwrap {
    display: block;
    animation: pa-drop .22s var(--ease) both;
  }

  .pa-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    padding-block: 14px 20px;
  }

  .pa-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
  }

  .pa-nav__link {
    width: 100%;
    padding: 12px 12px;
    font-size: 15px;
  }

  .pa-nav__num { display: inline; }

  .pa-nav__cta {
    width: 100%;
    padding-block: 12px;
  }

  .pa-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .pa-footer__brand { grid-column: 1 / -1; }

  .pa-footer__legal { margin-left: 0; }
}

@media (max-width: 560px) {
  .pa-footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .pa-footer__baseinner { flex-direction: column; align-items: flex-start; gap: 8px; }
  .pa-frame--wide { aspect-ratio: 16 / 9; }
}

/* ---------- 15. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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

  .pa-cta:hover,
  .pa-btn--primary:hover { transform: none; }
}