/* ==========================================================================
   半岛体赛场 · 共享样式 /assets/site.css
   深海墨蓝基底 + 荧光青状态 + 暖橙变更，切角面板与斜线运动轨迹
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --c-deep: #041C33;
  --c-navy: #0A2E4E;
  --c-window: #0E4C7A;
  --c-cyan: #17E0C8;
  --c-cyan-dark: #0FB9A6;
  --c-orange: #FF7A29;
  --c-orange-soft: #FFB169;
  --c-paper: #F2F5F8;
  --c-white: #FFFFFF;
  --c-steel: #8FA6B8;
  --c-line: #D8E2EA;

  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-20: 20px;
  --fs-28: 28px;
  --fs-44: 44px;
  --fs-72: 72px;
  --fs-120: 120px;

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

  --w-max: 1440px;
  --dur: 180ms;
  --ease: cubic-bezier(.2, .7, .3, 1);

  --cut-sm: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  --cut-md: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
  --cut-lg: polygon(36px 0, 100% 0, 100% calc(100% - 36px), calc(100% - 36px) 100%, 0 100%, 0 36px);

  --grid-line: rgba(23, 224, 200, .09);
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd, details, summary {
  margin: 0;
  padding: 0;
}
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; }
[hidden] { display: none !important; }

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-sans);
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--c-deep);
  background: var(--c-paper);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
h1, h2, h3, h4 { font-weight: 900; line-height: 1.25; letter-spacing: -.01em; }
b, strong { font-weight: 700; }
section[id], [id].section { scroll-margin-top: 128px; }

.u-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}
.display-1 {
  font-size: clamp(44px, 9vw, var(--fs-120));
  font-weight: 900;
  line-height: .94;
  letter-spacing: -.035em;
}
.display-2 {
  font-size: clamp(30px, 5vw, var(--fs-72));
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.025em;
}
.section-title {
  font-size: clamp(22px, 3vw, var(--fs-28));
  font-weight: 900;
  line-height: 1.3;
}
.u-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-cyan-dark);
}
.u-eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--c-cyan);
}
.u-eyebrow--on-ink { color: var(--c-cyan); }
.u-eyebrow--on-ink::before { background: var(--c-orange); }

/* ---------- 4. 容器 / 区块 / 网格 ---------- */
.container {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 20px;
}
.container--narrow { max-width: 980px; }
.container--prose { max-width: 760px; }

.section { padding: 64px 0; }
.section--tight { padding: 40px 0; }
.section--paper { background: var(--c-paper); }
.section--white { background: var(--c-white); }
.section--navy { background: var(--c-navy); color: var(--c-paper); }
.section--ink {
  background: var(--c-deep);
  color: var(--c-paper);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
}
.section--ink .section-title,
.section--navy .section-title { color: var(--c-white); }

.grid { display: grid; gap: 20px; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }

.divider {
  height: 1px;
  border: 0;
  background: var(--c-line);
  margin: 32px 0;
}
.divider--ink { background: rgba(255, 255, 255, .14); }

/* ---------- 5. 无障碍跳转与焦点 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--c-cyan);
  color: var(--c-deep);
  font-size: var(--fs-14);
  font-weight: 700;
  clip-path: var(--cut-sm);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; }

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

/* ---------- 6. 页眉：状态条 + 双端桅杆 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--c-deep);
  color: var(--c-paper);
  border-bottom: 1px solid rgba(23, 224, 200, .3);
}
.status-rail { background: #02101F; border-bottom: 1px solid rgba(143, 166, 184, .18); }
.status-rail__inner {
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 20px;
  height: 30px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--c-steel);
  white-space: nowrap;
  overflow: hidden;
}
.status-rail__pulse {
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--c-cyan);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(23, 224, 200, .18);
}
.status-rail__text { display: inline-flex; align-items: baseline; gap: 6px; }
.status-rail__text b { color: var(--c-cyan); font-weight: 600; }
.status-rail__text--quiet { color: rgba(143, 166, 184, .75); }
.status-rail__text--quiet b { color: var(--c-orange-soft); }
.status-rail__sep { color: rgba(143, 166, 184, .4); }

.masthead__inner {
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 20px;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  flex: 0 0 auto;
}
.brand__mark {
  width: 10px;
  height: 26px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-cyan-dark));
  clip-path: polygon(0 0, 100% 14%, 100% 100%, 0 86%);
  transition: transform var(--dur) var(--ease);
}
.brand:hover .brand__mark { transform: skewX(-8deg) scaleY(1.06); }
.brand__name {
  font-size: var(--fs-20);
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--c-white);
}
.brand__state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-size: var(--fs-12);
  color: var(--c-cyan);
  border: 1px solid rgba(23, 224, 200, .38);
  background: rgba(23, 224, 200, .08);
  clip-path: var(--cut-sm);
}
.brand__state-dot {
  width: 5px;
  height: 5px;
  background: var(--c-cyan);
  border-radius: 50%;
}

/* 导航：等宽编号 + 斜切悬停块 */
.site-nav__list { display: flex; align-items: stretch; gap: 4px; }
.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 11px 15px;
  font-size: var(--fs-14);
  color: rgba(233, 243, 248, .78);
  clip-path: var(--cut-sm);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.site-nav__idx { font-size: 11px; color: var(--c-steel); }
.site-nav__link:hover { background: rgba(23, 224, 200, .14); color: var(--c-white); }
.site-nav__link:hover .site-nav__idx { color: var(--c-cyan); }
.site-nav__link[aria-current="page"] {
  background: var(--c-cyan);
  color: var(--c-deep);
  font-weight: 700;
}
.site-nav__link[aria-current="page"] .site-nav__idx { color: rgba(4, 28, 51, .55); }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid rgba(23, 224, 200, .42);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  clip-path: var(--cut-sm);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover { background: rgba(23, 224, 200, .12); border-color: var(--c-cyan); }
.nav-toggle[aria-expanded="true"] {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-deep);
}
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 12px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 7. 页脚 ---------- */
.site-footer {
  background: var(--c-deep);
  color: var(--c-steel);
  border-top: 1px solid rgba(23, 224, 200, .28);
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
}
.site-footer__inner {
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 44px 20px 52px;
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
}
.footer-block { display: flex; flex-direction: column; gap: 10px; font-size: var(--fs-14); line-height: 1.7; }
.footer-block--lead::before {
  content: "";
  width: 44px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-cyan-dark));
}
.footer-sign {
  font-size: var(--fs-20);
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--c-white);
}
.footer-lead { color: rgba(233, 243, 248, .8); }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.footer-links a {
  color: #E8F2F7;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(23, 224, 200, .38);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-links a:hover { color: var(--c-cyan); border-bottom-color: var(--c-cyan); }
.footer-fact { color: var(--c-steel); word-break: break-word; }
.footer-mail { color: var(--c-cyan); }
.footer-tel { color: var(--c-white); }
.footer-block--note {
  border-left: 2px solid rgba(255, 122, 41, .7);
  padding-left: 16px;
}
.footer-note { color: rgba(233, 243, 248, .78); font-size: var(--fs-14); }
.footer-copy { font-family: var(--font-mono); font-size: var(--fs-12); color: rgba(143, 166, 184, .85); }

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: .04em;
  border: 1px solid var(--c-cyan);
  color: var(--c-cyan-dark);
  background: transparent;
  clip-path: var(--cut-sm);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn:hover { background: rgba(23, 224, 200, .14); color: var(--c-deep); }
.btn--accent { background: var(--c-cyan); border-color: var(--c-cyan); color: var(--c-deep); }
.btn--accent:hover { background: var(--c-cyan-dark); border-color: var(--c-cyan-dark); color: var(--c-deep); }
.btn--orange { border-color: var(--c-orange); color: var(--c-orange); }
.btn--orange:hover { background: rgba(255, 122, 41, .14); color: var(--c-deep); }
.btn--ghost { border-color: rgba(255, 255, 255, .42); color: var(--c-white); }
.btn--ghost:hover { background: rgba(255, 255, 255, .12); border-color: var(--c-cyan); color: var(--c-white); }

/* ---------- 9. 标签与差异标记 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .06em;
  border: 1px solid var(--c-line);
  color: var(--c-steel);
  background: var(--c-white);
}
.tag--new { background: var(--c-cyan); border-color: var(--c-cyan); color: var(--c-deep); font-weight: 600; }
.tag--changed { background: rgba(255, 177, 105, .2); border-color: var(--c-orange-soft); color: #B64A05; }
.tag--removed { background: rgba(143, 166, 184, .16); border-color: var(--c-line); color: #5C7488; }

.mark--new { color: var(--c-cyan-dark); font-weight: 700; }
.mark--changed { color: #C4551A; font-weight: 700; }
.mark--removed { color: var(--c-steel); text-decoration: line-through; }

/* ---------- 10. 面板 / 状态 / 指标 ---------- */
.panel {
  position: relative;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  padding: 22px;
}
.panel--cut { clip-path: var(--cut-md); }
.panel--navy {
  background: var(--c-navy);
  border-color: rgba(23, 224, 200, .22);
  color: var(--c-paper);
}
.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--c-line);
}
.panel--navy .panel__head { border-bottom-color: rgba(255, 255, 255, .14); }
.panel__title { font-size: var(--fs-20); font-weight: 900; }
.panel__meta { font-family: var(--font-mono); font-size: var(--fs-12); color: var(--c-steel); letter-spacing: .08em; }
.panel__body { font-size: var(--fs-16); }
.panel--navy .panel__body { color: rgba(233, 243, 248, .86); }

.status-panel {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 22px;
  background: var(--c-navy);
  border-left: 3px solid var(--c-cyan);
  clip-path: var(--cut-md);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.status-panel:hover { background: var(--c-window); border-left-color: var(--c-orange); }
.status-panel__value {
  font-family: var(--font-mono);
  font-size: var(--fs-44);
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -.02em;
}
.status-panel__label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-steel);
}

.metric { display: flex; flex-direction: column; gap: 4px; }
.metric__value {
  font-family: var(--font-mono);
  font-size: var(--fs-44);
  line-height: 1;
  color: var(--c-deep);
}
.metric__label { font-size: var(--fs-12); letter-spacing: .12em; color: var(--c-steel); }

/* ---------- 11. 目录索引地图 ---------- */
.index-map__list { display: flex; flex-direction: column; }
.index-map__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 4px;
  border-bottom: 1px dashed var(--c-line);
  transition: background var(--dur) var(--ease);
}
.index-map__item:hover { background: rgba(23, 224, 200, .1); }
.index-map__num { font-family: var(--font-mono); font-size: var(--fs-12); color: var(--c-steel); flex: none; }
.index-map__label { font-weight: 700; font-size: var(--fs-16); }
.index-map__item:hover .index-map__label { color: var(--c-cyan-dark); }
.index-map__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--c-cyan-dark);
}

/* ---------- 12. 轮次锚点轨 ---------- */
.anchor-nav__list { display: flex; flex-direction: column; gap: 2px; }
.anchor-nav__link {
  display: block;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--c-steel);
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.anchor-nav__link:hover { color: var(--c-deep); border-left-color: var(--c-line); }
.anchor-nav__link[aria-current="true"] {
  color: var(--c-deep);
  font-weight: 600;
  border-left-color: var(--c-cyan);
  background: rgba(23, 224, 200, .14);
}

/* ---------- 13. 数据表 ---------- */
.data-table {
  width: 100%;
  font-size: var(--fs-14);
  background: var(--c-white);
  border: 1px solid var(--c-line);
}
.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--c-line);
}
.data-table th {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-steel);
  background: rgba(216, 226, 234, .38);
  white-space: nowrap;
}
.data-table tbody tr:hover { background: rgba(23, 224, 200, .07); }

/* ---------- 14. 横向轨道 ---------- */
.track { position: relative; }
.track__list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(268px, 320px);
  gap: 16px;
  overflow-x: auto;
  padding: 4px 4px 16px;
  scroll-snap-type: x proximity;
  scrollbar-color: var(--c-cyan) rgba(216, 226, 234, .7);
  scrollbar-width: thin;
}
.track__list::-webkit-scrollbar { height: 6px; }
.track__list::-webkit-scrollbar-track { background: rgba(216, 226, 234, .8); }
.track__list::-webkit-scrollbar-thumb { background: var(--c-cyan-dark); }
.track__card { scroll-snap-align: start; }

/* ---------- 15. 折叠深读 ---------- */
.disclosure {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  clip-path: var(--cut-sm);
}
.disclosure__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 20px;
  font-weight: 700;
  font-size: var(--fs-16);
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease);
}
.disclosure__summary::-webkit-details-marker { display: none; }
.disclosure__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  color: var(--c-cyan-dark);
}
.disclosure__summary:hover { background: rgba(23, 224, 200, .1); }
.disclosure[open] .disclosure__summary::after { content: "–"; color: var(--c-orange); }
.disclosure[open] .disclosure__body { animation: disclosure-in var(--dur) var(--ease) both; }
.disclosure__body {
  padding: 0 20px 20px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: #3B5567;
  border-top: 1px solid var(--c-line);
  padding-top: 16px;
}
@keyframes disclosure-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 16. 面包屑与长文 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--c-steel);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--c-line); }
.breadcrumb a { transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--c-cyan-dark); }
.breadcrumb [aria-current="page"] { color: var(--c-deep); font-weight: 600; }

.prose { max-width: 700px; font-size: 17px; line-height: 1.75; }
.prose p { margin-bottom: 1.1em; }
.prose h2 { margin: 1.6em 0 .6em; font-size: var(--fs-28); }
.prose h3 { margin: 1.4em 0 .5em; font-size: var(--fs-20); }
.prose ul, .prose ol { margin: 0 0 1.1em 1.2em; list-style: disc; }
.prose li { margin-bottom: .4em; }
.prose a { color: var(--c-cyan-dark); border-bottom: 1px solid rgba(15, 185, 166, .5); }

/* ---------- 17. 图片容器（页面阶段填内容） ---------- */
.media-frame {
  position: relative;
  isolation: isolate;
  aspect-ratio: 16 / 9;
  width: 100%;
  overflow: hidden;
  background: var(--c-navy);
  clip-path: var(--cut-md);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}
.media-frame__img { width: 100%; height: 100%; object-fit: cover; }
.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--c-paper);
  background: linear-gradient(transparent, rgba(4, 28, 51, .9));
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--trail::after {
  content: "";
  position: absolute;
  left: -15%;
  top: 58%;
  width: 130%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-cyan), transparent);
  transform: rotate(-6deg);
}

/* ---------- 18. 滚动进度与显现 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 120;
  pointer-events: none;
  background: rgba(4, 28, 51, .12);
}
.scroll-progress__bar {
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
  transition: transform 140ms linear;
}
html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 380ms var(--ease), transform 380ms var(--ease);
}
html.js-ready [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 19. 响应式：页眉与页脚 ---------- */
@media (min-width: 900px) {
  .container { padding: 0 32px; }
  .status-rail__inner, .masthead__inner { padding: 0 32px; }
  .section { padding: 88px 0; }
  .section--tight { padding: 52px 0; }
  .site-footer__inner {
    grid-template-columns: 1.05fr 1.25fr 1fr;
    gap: 40px;
    padding: 56px 32px 64px;
  }
}

@media (max-width: 1180px) {
  .site-nav__link { padding: 10px 10px; font-size: 13px; }
  .brand__state { display: none; }
}

@media (max-width: 900px) {
  .masthead__inner {
    flex-wrap: wrap;
    padding-bottom: 0;
    gap: 0;
    min-height: 64px;
  }
  .brand { flex: 1 1 auto; padding: 12px 0; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    flex: 1 0 100%;
    display: none;
    margin-top: 12px;
    border-top: 1px solid rgba(23, 224, 200, .2);
  }
  .site-nav[data-open] { display: block; }
  .site-nav__list {
    flex-direction: column;
    gap: 0;
    padding: 6px 0 16px;
  }
  .site-nav__link {
    padding: 13px 10px;
    font-size: var(--fs-16);
    clip-path: none;
    border-bottom: 1px solid rgba(255, 255, 255, .07);
  }
  .site-nav__link:hover { background: rgba(23, 224, 200, .12); }
  .site-nav__link[aria-current="page"] {
    background: rgba(23, 224, 200, .16);
    color: var(--c-cyan);
    font-weight: 700;
  }
  .site-nav__link[aria-current="page"] .site-nav__idx { color: var(--c-cyan); }
}

@media (max-width: 560px) {
  .status-rail__text--quiet { display: none; }
  .status-rail__sep { display: none; }
  .section { padding: 52px 0; }
  .panel { padding: 18px; }
  .display-1 { letter-spacing: -.02em; }
}

/* ---------- 20. 降低动效 ---------- */
@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-ready [data-reveal] { opacity: 1; transform: none; }
  .scroll-progress__bar { transition: none; }
}