/* ============================================================
   RAYBET 版本速递 · Site Kit（/assets/site.css）
   深墨蓝档案室 × 双轨版本色（电光青 / 琥珀金）
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --ink: #0B1B2B;
  --ink-2: #122A3F;
  --ink-3: #0A1724;
  --line: #274257;
  --line-soft: rgba(39, 66, 87, 0.62);
  --cream: #F2E9D8;
  --paper: #FFF8EC;
  --cyan: #35E0F0;
  --cyan-deep: #0E7C8C;
  --amber: #F0B35A;
  --amber-deep: #8A5A1F;
  --orange: #E2643B;
  --black: #14110D;
  --fg: #DCE6EE;
  --fg-strong: #F7F2E7;
  --muted: #7D93A6;
  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", monospace;
  --wrap: 1280px;
  --pad: clamp(16px, 4vw, 40px);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --shadow-line: 0 0 0 1px rgba(39, 66, 87, 0.9);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
  background: var(--ink);
}

body {
  margin: 0;
  background-color: var(--ink);
  background-image:
    linear-gradient(90deg, rgba(39, 66, 87, 0.20) 1px, transparent 1px),
    linear-gradient(0deg, rgba(39, 66, 87, 0.14) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px;
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; }

::selection { background: var(--cyan); color: #06141c; }

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

/* ---------- 3. 排版与通用文本 ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 0.94;
  letter-spacing: 0.005em;
  color: var(--fg-strong);
}
.serif-title {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--fg-strong);
}
.mono {
  font-family: var(--font-mono);
  font-size: 0.78em;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  background: currentColor;
  flex: 0 0 auto;
}
.lede {
  max-width: 44em;
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.8;
  color: #B9CBD9;
}
.muted { color: var(--muted); }
.prose {
  max-width: 38em;
  line-height: 1.85;
  color: var(--fg);
}
.prose p + p { margin-top: 1em; }
.prose h2, .prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; }
.hairline {
  height: 1px;
  width: 100%;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------- 4. 容器与栅格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}
.section { padding-block: clamp(40px, 6vw, 80px); }
.section--tight { padding-block: clamp(24px, 3.5vw, 46px); }
.section--paper {
  background: var(--cream);
  color: var(--black);
  border-top: 1px solid #D8CBB2;
  border-bottom: 1px solid #D8CBB2;
}
.section--paper .eyebrow { color: var(--amber-deep); }
.section--paper .serif-title,
.section--paper .display { color: var(--black); }
.section--paper .lede { color: #3A3128; }
.section--paper .hairline { background: #D8CBB2; }

.grid { display: grid; gap: clamp(16px, 2vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.split {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(20px, 3vw, 48px);
  align-items: start;
}
.split--reverse { grid-template-columns: 5fr 7fr; }
.stack { display: grid; gap: clamp(12px, 1.6vw, 20px); align-content: start; }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.2;
  text-align: center;
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn--solid {
  background: var(--amber);
  border-color: var(--amber);
  color: #17100A;
}
.btn--solid:hover { background: #F7C57C; transform: translateY(-1px); }
.btn--cyan {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #05141B;
}
.btn--cyan:hover { background: #5FE9F5; transform: translateY(-1px); }
.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--cream);
}
.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(53, 224, 240, 0.07);
}
.btn--sm { padding: 8px 14px; font-size: 12.5px; }

/* ---------- 6. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.crumbs li { display: flex; align-items: center; gap: 10px; }
.crumbs li + li::before {
  content: "/";
  color: var(--line);
}
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--cream); }

/* ---------- 7. 面板与标签 ---------- */
.panel {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: clamp(18px, 2.4vw, 28px);
}
.panel--dark { background: var(--ink-3); }
.panel--paper {
  background: var(--cream);
  border-color: #D8CBB2;
  color: var(--black);
}
.panel--paper .serif-title,
.panel--paper .display { color: var(--black); }
.panel--paper a {
  color: var(--amber-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  background: rgba(18, 42, 63, 0.6);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.tag--cyan {
  color: var(--cyan);
  border-color: rgba(53, 224, 240, 0.42);
  background: rgba(53, 224, 240, 0.09);
}
.tag--amber {
  color: var(--amber);
  border-color: rgba(240, 179, 90, 0.42);
  background: rgba(240, 179, 90, 0.09);
}
.tag--orange {
  color: var(--orange);
  border-color: rgba(226, 100, 59, 0.45);
  background: rgba(226, 100, 59, 0.09);
}

/* ---------- 8. 图像容器（页面阶段放图用） ---------- */
.frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(53, 224, 240, 0.16), transparent 55%),
    radial-gradient(120% 140% at 92% 100%, rgba(240, 179, 90, 0.14), transparent 60%),
    var(--ink-3);
}
.frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(90deg, rgba(39, 66, 87, 0.55) 1px, transparent 1px),
    linear-gradient(0deg, rgba(39, 66, 87, 0.45) 1px, transparent 1px);
  background-size: 34px 34px, 34px 34px;
  opacity: 0.5;
  pointer-events: none;
}
.frame__media {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
}
.frame img,
.frame__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: #C7D6E2;
  background: linear-gradient(180deg, rgba(8, 20, 32, 0), rgba(8, 20, 32, 0.88));
}
.frame--16x9 { aspect-ratio: 16 / 9; }
.frame--4x3 { aspect-ratio: 4 / 3; }
.frame--1x1 { aspect-ratio: 1 / 1; }
.frame--3x4 { aspect-ratio: 3 / 4; }

.figure { margin: 0; display: grid; gap: 8px; }
.figure__cap {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 9. 筛选条（仅切换当前页已有内容） ---------- */
.filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(16px, 2vw, 26px);
}
.filter__btn {
  padding: 7px 13px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
    background 0.2s var(--ease);
}
.filter__btn:hover {
  color: var(--cream);
  border-color: #3C6383;
}
.filter__btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #05141B;
}
.filter__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.filter__item[hidden] { display: none !important; }

/* ---------- 10. 入场动效 ---------- */
.will-reveal {
  opacity: 0;
  transform: translateY(14px);
}
[data-reveal] {
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 11. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 16px;
  background: var(--cyan);
  color: #05141B;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--paper);
  outline-offset: 2px;
}

/* ---------- 12. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.header-top { background: var(--ink); }
.header-top__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  flex-wrap: wrap;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 11px var(--pad);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  margin-right: auto;
  min-width: 0;
}
.brand__glyph {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}
.brand__glyph::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--amber);
}
.brand__text {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--paper);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
  white-space: nowrap;
}
.brand:hover .brand__name { color: var(--cyan); }

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 4px 9px;
  border: 1px solid var(--line);
  background: rgba(18, 42, 63, 0.7);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--muted);
  white-space: nowrap;
}
.chip__dot {
  width: 6px;
  height: 6px;
  margin-right: 7px;
  border-radius: 50%;
  background: currentColor;
  flex: 0 0 auto;
}
.chip--cyan {
  color: var(--cyan);
  border-color: rgba(53, 224, 240, 0.42);
  background: rgba(53, 224, 240, 0.09);
}
.chip--amber {
  color: var(--amber);
  border-color: rgba(240, 179, 90, 0.42);
  background: rgba(240, 179, 90, 0.09);
}

.utility {
  display: flex;
  align-items: center;
  gap: 16px;
}
.utility__link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.utility__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.navtoggle:hover { border-color: var(--cyan); color: var(--cyan); }
.navtoggle__bars {
  display: grid;
  gap: 4px;
  width: 15px;
}
.navtoggle__bars span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform 0.24s var(--ease);
}
.navtoggle[aria-expanded="true"] .navtoggle__bars span:first-child {
  transform: translateY(2.5px) rotate(45deg);
}
.navtoggle[aria-expanded="true"] .navtoggle__bars span:last-child {
  transform: translateY(-2.5px) rotate(-45deg);
}
.navtoggle__text { white-space: nowrap; }

/* 下层：编号索引导航 */
.indexnav {
  background: rgba(9, 24, 38, 0.97);
  border-top: 1px solid var(--line);
}
.indexnav__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}
.indexnav__list {
  display: flex;
  align-items: stretch;
  width: 100%;
}
.indexnav__item {
  flex: 1 1 0;
  min-width: 0;
  border-left: 1px solid var(--line-soft);
}
.indexnav__item:last-child { border-right: 1px solid var(--line-soft); }
.indexnav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 14px 13px;
  color: #C2D3E0;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.indexnav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.35s var(--ease);
}
.indexnav__link:hover {
  color: var(--paper);
  background: rgba(53, 224, 240, 0.06);
}
.indexnav__link:hover::after { transform: scaleX(0.45); }
.indexnav__link[aria-current="page"] {
  color: var(--fg-strong);
  background: rgba(53, 224, 240, 0.10);
}
.indexnav__link[aria-current="page"]::after { transform: scaleX(1); }
.indexnav__link[aria-current="page"] .indexnav__num { color: var(--cyan); }
.indexnav__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.indexnav__label {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.indexnav__note {
  display: none;
  padding: 12px var(--pad) 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}
.header-progress span {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
}

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: linear-gradient(180deg, #0A1826 0%, #081320 100%);
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--cyan) 0%,
    rgba(53, 224, 240, 0.18) 46%,
    rgba(240, 179, 90, 0.18) 54%,
    var(--amber) 100%
  );
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 1.3fr;
  gap: clamp(24px, 3vw, 48px);
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(36px, 5vw, 64px) var(--pad) clamp(28px, 4vw, 46px);
}
.footer-brand__mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 28px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--paper);
}
.footer-brand__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}
.footer-brand__summary {
  margin-top: 14px;
  max-width: 26em;
  font-size: 13.5px;
  line-height: 1.8;
  color: #A9BECD;
}
.footer-brand__legend {
  margin-top: 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 6px;
}
.dot--cyan { background: var(--cyan); }
.dot--amber { background: var(--amber); margin-left: 16px; }

.footer-col__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--cream);
  text-transform: uppercase;
}
.footer-col__list li + li { margin-top: 8px; }
.footer-col__list a {
  display: inline-block;
  font-size: 13.5px;
  color: #A9BECD;
  transition: color 0.2s var(--ease);
}
.footer-col__list a:hover { color: var(--cyan); }

.footer-contact__list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 13.5px;
}
.footer-contact__list li + li { margin-top: 9px; }
.footer-contact__k {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}
.footer-contact__v {
  color: #C2D3E0;
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 16px var(--pad) 22px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.footer-bottom__legal a {
  color: #A9BECD;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.footer-bottom__legal a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.footer-bottom__icp { color: var(--muted); }

/* ---------- 14. 平板 ---------- */
@media (max-width: 1080px) {
  .indexnav__link { padding: 11px 10px 12px; gap: 6px; }
  .indexnav__label { font-size: 13px; }
  .footer-top { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-contact { grid-column: 1 / -1; }
  .footer-contact__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 clamp(20px, 3vw, 40px);
  }
}

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

/* ---------- 15. 移动端（抽屉导航） ---------- */
@media (max-width: 860px) {
  .navtoggle { display: inline-flex; }
  .utility { display: none; }

  .indexnav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    max-height: 76vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease),
      visibility 0.22s linear;
  }
  .site-header[data-open="true"] .indexnav {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .indexnav__inner { padding-inline: 0; }
  .indexnav__list { display: block; }
  .indexnav__item {
    border-left: 0;
    border-right: 0;
    border-top: 1px solid var(--line-soft);
  }
  .indexnav__item:last-child {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .indexnav__link {
    padding: 15px var(--pad);
    gap: 14px;
    align-items: center;
    font-size: 15px;
  }
  .indexnav__link::after {
    top: 0;
    bottom: 0;
    right: auto;
    width: 2px;
    height: auto;
    transform: scaleY(0);
    transform-origin: top center;
  }
  .indexnav__link:hover::after { transform: scaleY(0.45); }
  .indexnav__link[aria-current="page"]::after { transform: scaleY(1); }
  .indexnav__label { font-size: 15px; }
  .indexnav__note { display: block; padding-inline: var(--pad); }
}

/* ---------- 16. 手机 ---------- */
@media (max-width: 700px) {
  .header-top__inner { padding-block: 10px 0; row-gap: 10px; }
  .header-status {
    order: 3;
    flex: 1 0 100%;
    padding-bottom: 10px;
  }
  .brand__sub { display: none; }
  .brand__name { font-size: 19px; }
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-contact { grid-column: auto; }
  .footer-contact__list { grid-template-columns: minmax(0, 1fr); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .frame--3x4 { aspect-ratio: 3 / 4; }
}

/* ---------- 17. 减弱动效 ---------- */
@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;
  }
  .will-reveal,
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .indexnav {
    transition: none !important;
  }
}