/* ==========================================================================
   澳发平台 · 共享样式表 /assets/site.css
   深海墨蓝 · 旧纸米白 · 赭红 · 珊瑚橘 · 潮汐青 · 罗盘黄铜
   ========================================================================== */

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

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

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

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

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

img { height: auto; }

button, input, select, textarea { font: inherit; color: inherit; }

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

table { border-collapse: collapse; width: 100%; }

hr { border: 0; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B2231;
  --harbor: #102C3D;
  --paper: #F3EDE0;
  --paper-shade: #DFD3BC;
  --ochre: #A6432A;
  --coral: #E4714B;
  --tide: #57AFAE;
  --tide-deep: #1D6B69;
  --brass: #C08B3E;
  --graphite: #4B5D6B;
  --text-ink: #16232B;

  --glass: rgba(11, 34, 49, 0.74);
  --glass-line: rgba(87, 175, 174, 0.28);
  --paper-line: rgba(223, 211, 188, 0.9);

  --shell-max: 1240px;
  --gutter: clamp(1.15rem, 4vw, 3.5rem);
  --header-h: 76px;

  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "Inter", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", "Menlo", monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(90deg, rgba(223, 211, 188, 0.22) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(223, 211, 188, 0.16) 0 1px, transparent 1px 96px);
  color: var(--text-ink);
  font-family: var(--font-body);
  font-size: clamp(16px, 1.02vw, 18px);
  line-height: 1.75;
  letter-spacing: 0.012em;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(11, 34, 49, 0.035) 0 1px, transparent 1px 4px);
  opacity: 0.75;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.03em;
}

p { text-wrap: pretty; }

::selection {
  background: var(--coral);
  color: #fff;
}

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

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--coral);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: var(--gutter);
  z-index: 200;
  padding: 0.65rem 1.05rem;
  background: var(--coral);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0.75rem;
}

/* ---------- 5. 容器与通用布局 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(2.5rem, 6vw, 5.5rem);
  position: relative;
  z-index: 1;
}

.section--dark {
  background: var(--ink);
  color: var(--paper);
}

.section--harbor {
  background: var(--harbor);
  color: var(--paper);
}

.hairline {
  height: 1px;
  background: var(--paper-shade);
}

.grid {
  display: grid;
  gap: clamp(1.15rem, 3vw, 2rem);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(232px, 1fr)); }

/* ---------- 6. 小字坐标 ---------- */
.coordinate-line {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--graphite);
}

.coordinate-line--ondark { color: var(--tide); }

/* ---------- 7. 正文与导语 ---------- */
.lede {
  max-width: 58ch;
  font-size: clamp(1.05rem, 1.55vw, 1.26rem);
  line-height: 1.86;
  color: var(--graphite);
}

.lede--ondark { color: rgba(243, 237, 224, 0.8); }

.prose {
  max-width: 68ch;
}

.prose > * + * { margin-top: 1.15em; }

.prose h2,
.prose h3 {
  line-height: 1.32;
}

.prose h2 {
  margin-top: 2.4em;
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  color: var(--text-ink);
}

.prose h3 {
  margin-top: 1.8em;
  font-size: clamp(1.08rem, 1.7vw, 1.34rem);
}

.prose ul,
.prose ol {
  padding-left: 1.5em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.prose li + li { margin-top: 0.42em; }

.prose a {
  color: var(--tide-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.3em;
}

.prose a:hover { color: var(--ochre); }

.prose blockquote {
  border-left: 3px solid var(--ochre);
  padding-left: 1.1rem;
  font-family: var(--font-display);
  color: var(--graphite);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--paper-shade);
  padding: 0.08em 0.36em;
}

/* ---------- 8. 编号章节头 ---------- */
.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 0.6rem clamp(0.9rem, 2vw, 1.5rem);
  margin-bottom: clamp(1.4rem, 3vw, 2.4rem);
  padding-bottom: clamp(0.8rem, 2vw, 1.2rem);
  border-bottom: 1px solid var(--paper-line);
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3.8vw, 2.7rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ochre);
}

.section-head__title {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.45rem);
  letter-spacing: 0.05em;
}

.section-head__note {
  grid-column: 2;
  font-size: 0.9rem;
  color: var(--graphite);
}

.section--dark .section-head,
.section--harbor .section-head { border-bottom-color: rgba(223, 211, 188, 0.2); }

.section--dark .section-head__index,
.section--harbor .section-head__index { color: var(--brass); }

.section--dark .section-head__note,
.section--harbor .section-head__note { color: rgba(243, 237, 224, 0.65); }

/* ---------- 9. 卡片 / 玻璃 ---------- */
.plate {
  position: relative;
  padding: clamp(1.15rem, 2.6vw, 1.9rem);
  background: var(--paper);
  border: 1px solid var(--paper-shade);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.plate:hover,
.plate:focus-within {
  transform: translateY(-4px);
  border-color: var(--brass);
  box-shadow: 0 20px 36px -26px rgba(11, 34, 49, 0.55);
}

.glass {
  background: var(--glass);
  border: 1px solid var(--glass-line);
  color: var(--paper);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

/* ---------- 10. 标签 ---------- */
.tag {
  display: inline-block;
  padding: 0.22rem 0.62rem;
  border: 1px solid var(--paper-shade);
  background: rgba(87, 175, 174, 0.1);
  color: var(--tide-deep);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.tag--season {
  border-color: var(--coral);
  background: rgba(228, 113, 75, 0.12);
  color: var(--ochre);
}

.section--dark .tag,
.section--harbor .tag {
  border-color: rgba(87, 175, 174, 0.4);
  color: var(--tide);
}

/* ---------- 11. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.6rem;
  border: 1px solid transparent;
  background: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn--primary {
  background: var(--coral);
  border-color: var(--coral);
  color: #fff;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--ochre);
  border-color: var(--ochre);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--text-ink);
  color: var(--text-ink);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: var(--text-ink);
  color: var(--paper);
  transform: translateY(-2px);
}

.btn--ghost-light {
  border-color: rgba(243, 237, 224, 0.5);
  color: var(--paper);
}

.btn--ghost-light:hover,
.btn--ghost-light:focus-visible {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
  transform: translateY(-2px);
}

.btn--link {
  padding: 0;
  color: var(--tide-deep);
  text-decoration: underline;
  text-decoration-color: var(--coral);
  text-underline-offset: 0.4em;
}

.section--dark .btn--link,
.section--harbor .btn--link { color: var(--tide); }

.btn--link:hover { color: var(--ochre); }

/* ---------- 12. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem 0.55rem;
  color: var(--graphite);
}

.breadcrumb__list li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb__list li + li::before {
  content: "／";
  margin-right: 0.55rem;
  color: var(--brass);
}

.breadcrumb__list a {
  color: var(--tide-deep);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.breadcrumb__list a:hover {
  color: var(--ochre);
  border-bottom-color: var(--ochre);
}

.breadcrumb__list [aria-current="page"] { color: var(--text-ink); }

.section--dark .breadcrumb__list,
.section--harbor .breadcrumb__list { color: rgba(243, 237, 224, 0.6); }

.section--dark .breadcrumb__list [aria-current="page"],
.section--harbor .breadcrumb__list [aria-current="page"] { color: var(--paper); }

/* ---------- 13. 图片容器 ---------- */
.frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(150deg, var(--harbor), var(--ink));
  border: 1px solid var(--paper-shade);
}

.frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.04);
  transition: transform 0.4s ease, filter 0.4s ease;
}

.frame:hover img { transform: scale(1.03); filter: saturate(0.92) contrast(1.06); }

.frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(243, 237, 224, 0.14);
}

.frame--wide { aspect-ratio: 16 / 9; }
.frame--tall { aspect-ratio: 3 / 4; }
.frame--square { aspect-ratio: 1 / 1; }

.frame__cap {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--graphite);
}

.section--dark .frame,
.section--harbor .frame { border-color: rgba(223, 211, 188, 0.25); }

.section--dark .frame__cap,
.section--harbor .frame__cap { color: rgba(243, 237, 224, 0.6); }

/* ---------- 14. 显现与进度 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 90;
  pointer-events: none;
  background: linear-gradient(90deg, var(--ochre), var(--coral), var(--brass));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.1s linear;
}

/* ---------- 15. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(11, 34, 49, 0.95), rgba(16, 44, 61, 0.87));
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--glass-line);
  color: var(--paper);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--brass) 0 6px, transparent 6px 20px);
  opacity: 0.5;
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 2vw, 1.75rem);
  min-height: var(--header-h);
}

/* 品牌署名 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.68rem;
  flex: none;
  padding: 0.35rem 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--brass);
  background: rgba(192, 139, 62, 0.1);
  color: var(--brass);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  transform: rotate(-2deg);
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  transform: rotate(2deg);
  background: rgba(192, 139, 62, 0.22);
}

.brand__text { display: block; }

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
  color: var(--paper);
}

.brand__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--tide);
  line-height: 1.5;
}

/* 导航 */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 2vw, 1.25rem);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.2rem, 1.2vw, 1rem);
}

.site-nav__list a {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.62rem;
  color: rgba(243, 237, 224, 0.82);
  font-size: 0.94rem;
  letter-spacing: 0.04em;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 0.62rem;
  right: 0.62rem;
  bottom: 0.14rem;
  height: 1px;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s ease;
}

.site-nav__list a:hover,
.site-nav__list a:focus-visible { color: var(--paper); }

.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after { transform: scaleX(1); }

.site-nav__list a[aria-current="page"] { color: var(--coral); }

.site-nav__list a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--ochre);
}

.site-nav__coord {
  flex: 1 1 auto;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(87, 175, 174, 0.85);
  white-space: nowrap;
}

.site-nav__coord-label {
  display: inline-block;
  margin-right: 0.7em;
  color: rgba(192, 139, 62, 0.85);
}

.site-nav__cta {
  border: 1px solid var(--coral);
  background: rgba(228, 113, 75, 0.14);
  color: var(--paper) !important;
  padding: 0.42rem 1rem !important;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.site-nav__cta::after { display: none; }

.site-nav__cta:hover,
.site-nav__cta:focus-visible {
  background: var(--coral);
  border-color: var(--coral);
  color: #fff !important;
}

/* 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--glass-line);
  background: rgba(87, 175, 174, 0.08);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  cursor: pointer;
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 12px;
}

.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* ---------- 16. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background: linear-gradient(180deg, var(--harbor) 0%, var(--ink) 100%);
  color: rgba(243, 237, 224, 0.86);
  border-top: 1px solid rgba(192, 139, 62, 0.35);
  z-index: 1;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: repeating-linear-gradient(90deg, var(--ochre) 0 2px, transparent 2px 11px);
  opacity: 0.4;
  pointer-events: none;
}

.site-footer__inner {
  padding-block: clamp(2.6rem, 5vw, 4.5rem) 1.75rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.4fr 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
}

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

.footer-col__title {
  margin-bottom: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid rgba(192, 139, 62, 0.25);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brass);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.6vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.2;
  color: var(--paper);
}

.footer-motto {
  margin-top: 0.55rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: 0.08em;
  color: var(--tide);
}

.footer-sign {
  display: inline-block;
  margin-top: 1.5rem;
  padding-top: 0.75rem;
  border-top: 1px dashed rgba(223, 211, 188, 0.22);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: rgba(243, 237, 224, 0.45);
}

.footer-links li + li { margin-top: 0.5rem; }

.footer-links a {
  display: inline-block;
  font-size: 0.94rem;
  color: rgba(243, 237, 224, 0.78);
  transition: color 0.18s ease, padding-left 0.18s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--coral);
  padding-left: 0.35rem;
}

.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  line-height: 1.95;
  color: rgba(243, 237, 224, 0.72);
}

.footer-meta li {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
}

.footer-meta__key {
  flex: none;
  min-width: 3.2em;
  color: var(--tide);
}

.footer-meta__val { word-break: break-word; }

.footer-icp {
  margin-top: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: rgba(243, 237, 224, 0.55);
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem 2rem;
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.25rem;
  border-top: 1px solid rgba(223, 211, 188, 0.16);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: rgba(243, 237, 224, 0.5);
}

.footer-note { max-width: 46ch; }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1080px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .footer-col--brand { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  :root { --header-h: 66px; }

  .site-header__inner {
    flex-wrap: wrap;
    padding-block: 0.55rem;
    row-gap: 0.35rem;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    flex: 1 1 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.32s ease, opacity 0.24s ease;
  }

  .site-header[data-open="true"] .site-nav {
    max-height: min(72vh, 560px);
    opacity: 1;
    overflow-y: auto;
    padding-bottom: 1rem;
  }

  .site-nav__coord {
    order: -1;
    flex: 0 0 auto;
    text-align: left;
    padding: 0.85rem 0.2rem;
    border-bottom: 1px solid var(--glass-line);
    font-size: 0.64rem;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .site-nav__list--end {
    margin-top: 0.35rem;
    padding-top: 0.35rem;
    border-top: 1px solid var(--glass-line);
  }

  .site-nav__list a {
    display: block;
    padding: 0.72rem 0.2rem;
    border-bottom: 1px dashed rgba(223, 211, 188, 0.16);
    font-size: 1rem;
  }

  .site-nav__list a::after { display: none; }

  .site-nav__list a[aria-current="page"] { color: var(--coral); }

  .site-nav__cta {
    width: 100%;
    margin-top: 0.8rem;
    padding: 0.7rem 1rem !important;
    border-bottom: 0 !important;
    text-align: center;
  }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .site-footer__grid { grid-template-columns: 1fr; gap: 1.9rem; }

  .site-footer__base { flex-direction: column; align-items: flex-start; }

  .brand__sub { letter-spacing: 0.18em; }

  .section-head { grid-template-columns: auto 1fr; }
}

/* ---------- 18. 动效偏好 ---------- */
@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;
  }

  .reveal { opacity: 1; transform: none; }

  .plate:hover,
  .btn:hover { transform: none; }

  .frame:hover img { transform: none; }
}