/* =========================================================
   半岛娱乐 · 共享站点样式  /assets/site.css
   深渊靛蓝航海图 + 粗野主义面板 + 等宽数据
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

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

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

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

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

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

a { color: inherit; }

h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; text-wrap: balance; }

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

[hidden] { display: none !important; }

/* ---------- 2. 变量 ---------- */
:root {
  --c-ink: #071A2B;
  --c-tide: #0E2D3C;
  --c-slate: #173B4D;
  --c-glass: #2E5D6E;
  --c-sand: #D9B36C;
  --c-signal: #F26B3A;
  --c-aqua: #46F0C8;
  --c-white: #EAF4F4;
  --c-mist: #9FB8C0;
  --c-void: #031019;

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

  --max: 1320px;
  --gutter: 48px;
  --header-h: 104px;
  --grid-gap: 24px;
  --radius: 2px;
  --border: 2px solid var(--c-glass);
  --shadow-hard: 8px 8px 0 rgba(3, 16, 25, .55);
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--c-ink);
  color: var(--c-white);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--c-aqua);
  color: var(--c-void);
}

#main-content:focus { outline: none; }

/* ---------- 4. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  display: inline-block;
  padding: 10px 18px;
  background: var(--c-aqua);
  color: var(--c-void);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  border: 2px solid var(--c-void);
  box-shadow: 4px 4px 0 rgba(3, 16, 25, .8);
  transform: translateY(-180%);
  transition: transform .18s var(--ease);
}

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

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background-color .18s var(--ease),
    border-color .18s var(--ease),
    box-shadow .18s var(--ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: linear-gradient(180deg, rgba(3, 16, 25, .94) 0%, rgba(3, 16, 25, .62) 58%, rgba(3, 16, 25, 0) 100%);
  transition: opacity .18s var(--ease);
}

.site-header[data-scrolled] {
  background-color: var(--c-ink);
  border-bottom-color: var(--c-glass);
  box-shadow: 0 14px 26px rgba(3, 16, 25, .5);
}

.site-header[data-scrolled]::before { opacity: 0; }

/* 状态轨 */
.site-header__rail {
  border-bottom: 1px solid rgba(46, 93, 110, .5);
  transition: border-color .18s var(--ease);
}

.site-header__rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 32px;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header__rail-text {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--c-white);
  white-space: nowrap;
}

.site-header__rail-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--c-sand);
  white-space: nowrap;
}

.status-dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  background: var(--c-aqua);
  box-shadow: 0 0 0 3px rgba(70, 240, 200, .16);
  animation: status-pulse 2.6s var(--ease) infinite;
}

@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(70, 240, 200, .16); }
  50% { box-shadow: 0 0 0 6px rgba(70, 240, 200, .04); }
}

/* 主桅杆 */
.site-header__bar {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 72px;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--c-white);
}

.brand__mark {
  position: relative;
  display: block;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border: 2px solid var(--c-sand);
}

.brand__mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 18px;
  background: var(--c-aqua);
  transform: translate(-50%, -50%) rotate(38deg);
}

.brand__mark::after {
  content: "";
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 8px;
  height: 8px;
  background: var(--c-signal);
}

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

.brand__name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .1em;
}

.brand__tagline {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  color: var(--c-sand);
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__item { display: block; }

.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 0;
  color: var(--c-mist);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition:
    color .16s var(--ease),
    background-color .16s var(--ease),
    border-color .16s var(--ease);
}

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--c-glass);
  transition: color .16s var(--ease);
}

.site-nav__label { font-weight: 500; }

.site-nav__link:hover {
  color: var(--c-white);
  background: rgba(23, 59, 77, .82);
  border-color: var(--c-glass);
}

.site-nav__link:hover .site-nav__index { color: var(--c-sand); }

.site-nav__link[aria-current="page"] {
  color: var(--c-void);
  background: var(--c-sand);
  border-color: var(--c-sand);
  font-weight: 700;
}

.site-nav__link[aria-current="page"] .site-nav__index { color: var(--c-slate); }

.site-nav__foot { display: none; }

.site-nav__cta { width: 100%; }

.site-nav__note {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-mist);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  margin-left: 8px;
}

/* 菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(7, 26, 43, .8);
  border: 2px solid var(--c-glass);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  transition: border-color .16s var(--ease), background-color .16s var(--ease);
}

.nav-toggle:hover { border-color: var(--c-sand); }

.nav-toggle__label { line-height: 1; }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--c-aqua);
  transition: transform .18s var(--ease), opacity .18s var(--ease);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--c-aqua);
  background: rgba(70, 240, 200, .1);
}

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

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

/* 阅读进度 */
.site-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(46, 93, 110, .4);
  pointer-events: none;
}

.site-header__progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: var(--c-aqua);
  box-shadow: 0 0 10px rgba(70, 240, 200, .55);
  transition: width .12s linear;
}

/* 移动端打开状态 */
.site-header[data-open] {
  background-color: var(--c-ink);
  border-bottom-color: var(--c-glass);
}

.site-header[data-open]::before { opacity: 0; }

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  background-color: var(--c-tide);
  color: var(--c-white);
  border-top: 2px solid var(--c-glass);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image:
    linear-gradient(90deg, rgba(46, 93, 110, .16) 1px, transparent 1px),
    linear-gradient(0deg, rgba(46, 93, 110, .1) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px;
}

.site-footer__scan {
  position: relative;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, rgba(217, 179, 108, .55) 0 1px, transparent 1px 20px);
}

.site-footer__inner {
  position: relative;
  z-index: 1;
}

.site-footer__masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding-block: 56px 40px;
  border-bottom: 2px solid var(--c-glass);
}

.footer-brand { max-width: 520px; }

.footer-brand__link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--c-white);
}

.footer-brand__mark {
  position: relative;
  display: block;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: 2px solid var(--c-sand);
}

.footer-brand__mark::after {
  content: "";
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 7px;
  height: 7px;
  background: var(--c-signal);
}

.footer-brand__name {
  font-size: clamp(30px, 4.6vw, 54px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: .06em;
}

.footer-brand__tagline {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .16em;
  color: var(--c-mist);
}

.footer-status { max-width: 380px; }

.footer-status__chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 2px solid var(--c-glass);
  background: rgba(7, 26, 43, .62);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-aqua);
}

.footer-status__note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.35fr);
  gap: 32px;
  padding-block: 44px 48px;
  border-bottom: 1px solid rgba(46, 93, 110, .6);
}

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

.footer-col__title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .24em;
  color: var(--c-sand);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col__link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 15px;
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.footer-col__link:hover {
  color: var(--c-white);
  border-bottom-color: var(--c-aqua);
}

.footer-col__link[aria-current="page"] {
  color: var(--c-aqua);
  border-bottom-color: rgba(70, 240, 200, .5);
}

.footer-col--contact .footer-col__list { gap: 14px; }

.footer-contact__item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--c-glass);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--c-white);
  overflow-wrap: anywhere;
}

.footer-contact__note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed rgba(46, 93, 110, .8);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  padding-block: 22px 30px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-mist);
}

.footer-legal__meta { color: var(--c-mist); }

.footer-legal__icp { color: var(--c-glass); }

.site-footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-legal__link {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 93, 110, .8);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.footer-legal__link:hover {
  color: var(--c-aqua);
  border-bottom-color: var(--c-aqua);
}

.footer-legal__link[aria-current="page"] {
  color: var(--c-aqua);
  border-bottom-color: var(--c-aqua);
}

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition:
    transform .14s var(--ease),
    box-shadow .14s var(--ease),
    background-color .16s var(--ease),
    color .16s var(--ease),
    border-color .16s var(--ease);
}

.btn--primary {
  background: var(--c-signal);
  color: var(--c-void);
  border-color: var(--c-void);
  box-shadow: 4px 4px 0 rgba(3, 16, 25, .85);
}

.btn--primary:hover {
  background: #FF7C4E;
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 rgba(3, 16, 25, .9);
}

.btn--primary:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 rgba(3, 16, 25, .9);
}

.btn--ghost {
  background: transparent;
  color: var(--c-white);
  border-color: var(--c-glass);
}

.btn--ghost:hover {
  color: var(--c-sand);
  border-color: var(--c-sand);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-mist);
}

.breadcrumb__link {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--c-aqua);
  border-bottom-color: var(--c-aqua);
}

.breadcrumb__sep { color: var(--c-glass); }

.breadcrumb__current { color: var(--c-sand); }

/* ---------- 10. 正文 ---------- */
.prose {
  max-width: 74ch;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(234, 244, 244, .88);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2 {
  margin-top: 1.9em;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 500;
  color: var(--c-white);
}

.prose h3 {
  margin-top: 1.6em;
  font-size: 20px;
  color: var(--c-white);
}

.prose a {
  color: var(--c-aqua);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 240, 200, .5);
}

.prose ul, .prose ol {
  padding-left: 1.2em;
  list-style: square;
}

.prose li + li { margin-top: .45em; }

.prose strong { color: var(--c-white); }

/* ---------- 11. 标题与索引 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--c-sand);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--c-sand);
}

.section-title {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 500;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--c-white);
}

.display {
  font-size: clamp(44px, 7vw, 88px);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--c-white);
}

/* ---------- 12. 面板 / 标签 / 数据 ---------- */
.panel {
  position: relative;
  padding: 22px;
  background: var(--c-slate);
  border: 2px solid var(--c-glass);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

.panel--focus {
  background: var(--c-tide);
  border-color: var(--c-sand);
}

.panel__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--c-sand);
}

.panel__title {
  margin-top: 8px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-white);
}

.panel__meta {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mist);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--c-glass);
  border-radius: 0;
  background: rgba(14, 45, 60, .7);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  line-height: 1.6;
  color: var(--c-mist);
}

.tag--sand {
  color: var(--c-sand);
  border-color: rgba(217, 179, 108, .6);
  background: rgba(217, 179, 108, .08);
}

.tag--aqua {
  color: var(--c-void);
  background: var(--c-aqua);
  border-color: var(--c-aqua);
  font-weight: 700;
}

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

.num--lg {
  display: inline-block;
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 600;
  line-height: 1;
}

.num--sm {
  font-size: 14px;
  font-weight: 500;
}

/* ---------- 13. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 2px solid var(--c-glass);
  border-radius: var(--radius);
  background-image: linear-gradient(140deg, var(--c-tide) 0%, var(--c-ink) 58%, var(--c-slate) 100%);
  box-shadow: var(--shadow-hard);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(180deg, rgba(3, 16, 25, 0) 40%, rgba(3, 16, 25, .62) 100%);
}

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

.media__img,
.media > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  margin: 0;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-white);
}

/* ---------- 14. 标签轨道 ---------- */
.track {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--c-glass);
}

.track__btn {
  padding: 8px 14px;
  border: 2px solid var(--c-glass);
  border-radius: 0;
  background: transparent;
  color: var(--c-mist);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  transition:
    background-color .16s var(--ease),
    color .16s var(--ease),
    border-color .16s var(--ease);
}

.track__btn:hover {
  color: var(--c-sand);
  border-color: var(--c-sand);
}

.track__btn[aria-selected="true"] {
  background: var(--c-sand);
  border-color: var(--c-sand);
  color: var(--c-void);
}

.track__panel { padding-top: 26px; }

/* ---------- 15. 折叠卡 ---------- */
.fold {
  border: 2px solid var(--c-glass);
  border-radius: var(--radius);
  background: var(--c-slate);
}

.fold + .fold { margin-top: 12px; }

.fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-white);
  cursor: pointer;
  list-style: none;
}

.fold__summary::-webkit-details-marker { display: none; }

.fold__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--c-aqua);
}

.fold[open] .fold__summary::after { content: "−"; }

.fold__body {
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 16. 显现 ---------- */
[data-reveal] {
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
}

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

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1240px) {
  .site-nav__link { padding: 9px 9px; font-size: 13.5px; }
  .site-nav__index { font-size: 9.5px; }
  .brand__name { font-size: 16px; }
}

@media (max-width: 1024px) {
  :root {
    --gutter: 32px;
    --header-h: 88px;
    --grid-gap: 20px;
  }

  .site-header__rail-inner { height: 26px; }
  .site-header__bar { height: 62px; gap: 14px; }

  .nav-toggle { display: inline-flex; position: relative; z-index: 3; margin-left: auto; }
  .site-header__actions { display: none; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2;
    display: none;
    flex-direction: column;
    align-items: stretch;
    margin-left: 0;
    padding: 22px var(--gutter) 40px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--c-ink);
    border-top: 1px solid var(--c-glass);
  }

  .site-header[data-open] .site-nav { display: flex; }

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

  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    align-items: baseline;
    gap: 14px;
    padding: 18px 0;
    border: 0;
    border-bottom: 1px solid rgba(46, 93, 110, .55);
    font-size: 20px;
  }

  .site-nav__index { font-size: 11px; letter-spacing: .1em; color: var(--c-sand); }
  .site-nav__label { font-weight: 500; }

  .site-nav__link:hover { background: transparent; border-color: transparent; border-bottom-color: var(--c-glass); }

  .site-nav__link[aria-current="page"] {
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--c-aqua);
    color: var(--c-aqua);
  }

  .site-nav__link[aria-current="page"] .site-nav__index { color: var(--c-aqua); }

  .site-nav__foot {
    display: block;
    margin-top: auto;
    padding-top: 32px;
  }

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

  .site-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px 24px;
  }

  .site-footer__masthead { padding-block: 40px 32px; }
  .site-footer { margin-top: 72px; }
}

@media (max-width: 700px) {
  :root { --gutter: 20px; }

  .site-header__rail-text { font-size: 10px; letter-spacing: .12em; }
  .site-header__rail-meta { font-size: 10px; letter-spacing: .14em; }

  .brand__mark { width: 26px; height: 26px; }
  .brand__name { font-size: 15px; letter-spacing: .08em; }
  .brand__tagline { font-size: 9px; letter-spacing: .24em; }

  .nav-toggle { padding: 8px 10px; font-size: 10px; }

  .site-nav__link { font-size: 18px; padding: 16px 0; }

  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .col-3, .col-4, .col-6, .col-8, .col-12 { grid-column: span 2; }

  .site-footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .site-footer__legal { padding-block: 18px 26px; font-size: 10px; letter-spacing: .08em; }
  .site-footer__legal-links { gap: 14px; }

  .prose { font-size: 16px; line-height: 1.8; }
  .panel { padding: 18px; }
  .site-footer { margin-top: 56px; }
}

@media (max-width: 380px) {
  .nav-toggle__label { display: none; }
  .site-nav__link { font-size: 17px; }
}

/* ---------- 18. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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

  .site-header__progress-bar { transition: none; }
}