/* 恒峰平台中心 · 共享样式 /assets/site.css */

/* ---------- 01 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, fieldset {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

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

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

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

a { color: inherit; }

/* ---------- 02 变量 ---------- */
:root {
  --c-rock: #0E2A47;
  --c-rock-deep: #0B2137;
  --c-rock-2: #17395C;
  --c-cyan: #12A5B5;
  --c-cyan-soft: #7FD9E0;
  --c-orange: #FF7A2F;
  --c-orange-deep: #E0621A;
  --c-graphite: #1B1F26;
  --c-mist: #F1F3F5;
  --c-cream: #FAF7F2;
  --c-clay: #C1704F;
  --c-moss: #6F8B72;
  --c-line: #D5DBE2;
  --c-muted: #657082;
  --c-body: #2B3440;

  --rail-w: 88px;
  --topbar-h: 64px;
  --wrap: 1320px;
  --r: 3px;

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

  --shadow-1: 0 1px 2px rgba(14, 42, 71, .06);
  --shadow-2: 0 14px 32px -20px rgba(14, 42, 71, .55);

  --t-fast: 160ms cubic-bezier(.22, .61, .36, 1);
  --t-base: 200ms cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 03 基础 ---------- */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--c-mist);
  color: var(--c-graphite);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(14, 42, 71, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 42, 71, .035) 1px, transparent 1px);
  background-size: 72px 72px;
}

body.is-nav-open { overflow: hidden; }

#main-content {
  flex: 1 0 auto;
  display: block;
}

.page-shell {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(24px, 3.4vw, 52px) clamp(16px, 3vw, 40px) clamp(56px, 7vw, 96px);
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 40px);
}

/* ---------- 04 无障碍与焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
  box-shadow: inset 0 0 0 1px var(--c-orange);
}

.skip-link {
  position: fixed;
  left: 12px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--c-orange);
  color: #fff;
  font-size: 14px;
  letter-spacing: .06em;
  text-decoration: none;
  border-radius: 2px;
  transition: top var(--t-fast);
}

.skip-link:focus { top: 12px; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 05 页头 · 状态条 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
}

.topbar {
  position: relative;
  background: rgba(241, 243, 245, .94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-line);
}

.topbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  min-height: var(--topbar-h);
  padding: 10px clamp(16px, 3vw, 40px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex: 0 1 auto;
}

.brand__mark {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 2px;
  background:
    linear-gradient(90deg, transparent 0 44%, rgba(255, 255, 255, .92) 44% 56%, transparent 56% 100%),
    linear-gradient(160deg, var(--c-rock) 0 58%, var(--c-cyan) 58% 100%);
  box-shadow: inset 0 0 0 1px rgba(14, 42, 71, .28);
}

.brand__name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--c-rock);
  white-space: nowrap;
}

.brand__version {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-orange);
  border: 1px solid rgba(255, 122, 47, .55);
  border-radius: 2px;
  padding: 1px 5px;
  background: rgba(255, 122, 47, .08);
}

.brand__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--c-muted);
  white-space: nowrap;
}

.notice-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 240px;
  min-width: 0;
  font-size: 13px;
  color: var(--c-rock-2);
  letter-spacing: .02em;
}

.notice-strip__dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 47, .16);
}

.notice-strip__text {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.progress-track {
  position: relative;
  height: 2px;
  background: rgba(14, 42, 71, .08);
  overflow: hidden;
}

.progress-track__fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-cyan) 0%, var(--c-cyan-soft) 55%, var(--c-orange) 100%);
}

/* ---------- 06 抽屉按钮与遮罩 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--c-line);
  border-radius: 2px;
  background: #fff;
  color: var(--c-rock);
  font-size: 13px;
  letter-spacing: .1em;
  transition: border-color var(--t-fast), background-color var(--t-fast);
}

.nav-toggle:hover { border-color: var(--c-cyan); background: rgba(18, 165, 181, .06); }

.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 2px;
  background: var(--c-rock);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--c-rock);
  transition: transform var(--t-fast);
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 85;
  background: rgba(11, 33, 55, .45);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}

.nav-scrim[data-visible] {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 07 侧边编号轨道导航（桌面） ---------- */
.site-nav {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 80;
  display: flex;
  flex-direction: column;
  padding: 18px 0 14px;
  overflow-y: auto;
  overscroll-behavior: contain;
  color: #c3d3e0;
  background: linear-gradient(180deg, var(--c-rock) 0%, var(--c-rock-2) 62%, var(--c-rock-deep) 100%);
  border-right: 1px solid rgba(127, 217, 224, .16);
}

.site-nav__title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 6px 12px;
  margin-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: rgba(127, 217, 224, .72);
  white-space: nowrap;
}

.site-nav__title-num { color: var(--c-orange); }

.site-nav__list {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.site-nav__item { display: block; }

.nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 13px 4px;
  text-decoration: none;
  color: #c3d3e0;
  box-shadow: inset 2px 0 0 transparent;
  transition: color var(--t-fast), background-color var(--t-fast), box-shadow var(--t-fast);
}

.nav-link__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: #6d8ba4;
  transition: color var(--t-fast);
}

.nav-link__label {
  writing-mode: vertical-rl;
  font-size: 12px;
  line-height: 1.15;
  letter-spacing: .14em;
}

.nav-link:hover {
  color: #fff;
  background: rgba(18, 165, 181, .16);
  box-shadow: inset 2px 0 0 var(--c-cyan);
}

.nav-link:hover .nav-link__num { color: var(--c-cyan-soft); }

.nav-link[aria-current="page"] {
  color: #fff;
  background: linear-gradient(90deg, rgba(255, 122, 47, .26), rgba(255, 122, 47, 0));
  box-shadow: inset 2px 0 0 var(--c-orange);
}

.nav-link[aria-current="page"] .nav-link__num { color: var(--c-orange); }

.site-nav__foot {
  margin-top: auto;
  padding: 12px 6px 0;
  border-top: 1px solid rgba(255, 255, 255, .1);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: rgba(127, 217, 224, .6);
}

/* ---------- 08 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: auto;
  background: var(--c-rock);
  color: #c9d6e2;
  border-top: 1px solid var(--c-rock-2);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(127, 217, 224, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 217, 224, .07) 1px, transparent 1px);
  background-size: 72px 72px;
}

.footer__inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 72px) clamp(16px, 3vw, 40px) 28px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(24px, 3vw, 44px);
}

.footer__brand { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }

.footer__brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.footer__brand-name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .1em;
  color: #fff;
}

.footer__brand-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-cyan-soft);
}

.footer__brand-note {
  font-size: 14px;
  line-height: 1.7;
  color: #9fb2c4;
  max-width: 34ch;
}

.footer__cta { margin-top: 4px; }

.footer__col { display: flex; flex-direction: column; gap: 12px; }

.footer__col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .16em;
  color: var(--c-cyan-soft);
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}

.footer__list { display: flex; flex-direction: column; gap: 8px; }

.footer__item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: #adbecd;
}

.footer__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--c-orange);
}

.footer__link {
  text-decoration: none;
  color: #c9d6e2;
  transition: color var(--t-fast);
}

.footer__link:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--c-cyan);
}

.footer__contact {
  margin-top: clamp(28px, 3.6vw, 44px);
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px 28px;
}

.footer__contact-line {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13.5px;
  color: #adbecd;
  line-height: 1.7;
}

.footer__contact-key {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-cyan-soft);
  border: 1px solid rgba(127, 217, 224, .3);
  border-radius: 2px;
  padding: 1px 6px;
}

.footer__meta {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  justify-content: space-between;
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: #7f93a6;
}

.footer__icp { color: #93a8ba; }
.footer__copy { color: #7f93a6; }

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(127, 217, 224, .35);
  border-radius: 2px;
  background: rgba(18, 165, 181, .1);
  color: #d9e6f0;
  font-size: 13px;
  letter-spacing: .08em;
  transition: border-color var(--t-fast), background-color var(--t-fast), transform var(--t-fast), opacity var(--t-base);
}

.to-top:hover {
  border-color: var(--c-orange);
  background: rgba(255, 122, 47, .14);
  transform: translateY(-2px);
}

.to-top[data-visible] { opacity: 1; }

/* ---------- 09 通用组件 ---------- */
.grid { display: grid; gap: clamp(16px, 2vw, 24px); }
.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)); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: 1 / -1; }

.stack { display: flex; flex-direction: column; gap: var(--stack-gap, 16px); }
.stack--sm { --stack-gap: 8px; }
.stack--lg { --stack-gap: 28px; }

.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }

.rule { height: 1px; border: 0; background: var(--c-line); }

.panel {
  background: var(--c-cream);
  border: 1px solid var(--c-line);
  border-radius: var(--r);
  padding: clamp(18px, 2.2vw, 26px);
  box-shadow: var(--shadow-1);
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}

.panel--hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  border-color: #c3ccd6;
}

.panel--dark {
  background: linear-gradient(160deg, var(--c-rock) 0%, var(--c-rock-2) 100%);
  border-color: var(--c-rock-2);
  color: #dbe6ef;
}

.panel--dark .panel__title { color: #fff; }
.panel--dark .panel__note { color: #9fb2c4; }

.panel--ghost {
  background: transparent;
  box-shadow: none;
  border-style: dashed;
}

.panel__title {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--c-rock);
  line-height: 1.45;
}

.panel__note {
  margin-top: 6px;
  font-size: 14px;
  color: var(--c-muted);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding-bottom: 12px;
  margin-bottom: clamp(16px, 2vw, 24px);
  border-bottom: 1px solid var(--c-line);
}

.section-head__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: #fff;
  background: var(--c-rock);
  padding: 3px 8px;
  border-radius: 2px;
}

.section-head__title {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--c-rock);
}

.section-head__note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-muted);
}

.page-title {
  font-size: clamp(30px, 4.4vw, 52px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: .04em;
  color: var(--c-rock);
}

.lede {
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.75;
  color: var(--c-body);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-cyan);
}

.meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  background: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--c-rock-2);
}

.tag--cyan { border-color: rgba(18, 165, 181, .4); background: rgba(18, 165, 181, .1); color: #0b7c89; }
.tag--orange { border-color: rgba(255, 122, 47, .45); background: rgba(255, 122, 47, .1); color: #c9521a; }
.tag--clay { border-color: rgba(193, 112, 79, .4); background: rgba(193, 112, 79, .1); color: var(--c-clay); }
.tag--moss { border-color: rgba(111, 139, 114, .45); background: rgba(111, 139, 114, .12); color: #4f6b52; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--c-rock);
  border-radius: 2px;
  background: #fff;
  color: var(--c-rock);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .06em;
  text-decoration: none;
  transition: transform var(--t-fast), background-color var(--t-fast), color var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
}

.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn:active { transform: translateY(0); box-shadow: var(--shadow-1); }

.btn--accent {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: #fff;
}

.btn--accent:hover { background: var(--c-orange-deep); border-color: var(--c-orange-deep); }

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

.btn--ghost:hover { border-color: var(--c-cyan); color: #0b7c89; }

.btn--sm { padding: 7px 12px; font-size: 13px; }

.btn--block { width: 100%; }

.breadcrumb { margin-bottom: clamp(18px, 2.4vw, 28px); }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-muted);
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: #a9b4c0;
}

.breadcrumb__item a {
  text-decoration: none;
  color: var(--c-rock-2);
}

.breadcrumb__item a:hover {
  color: var(--c-orange);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumb__item[aria-current="page"] { color: var(--c-graphite); }

.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--c-body);
}

.prose h2 {
  margin: 28px 0 10px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--c-rock);
}

.prose h3 {
  margin: 22px 0 8px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--c-rock-2);
}

.prose p + p { margin-top: 12px; }

.prose ul { margin-top: 10px; }

.prose li {
  position: relative;
  padding-left: 18px;
  margin-top: 6px;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 6px;
  height: 1px;
  background: var(--c-cyan);
}

.prose a {
  color: #0b7c89;
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.prose strong { font-weight: 600; color: var(--c-rock); }

/* ---------- 10 图像容器（页面阶段放置图片） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--c-line);
  border-radius: var(--r);
  background:
    linear-gradient(135deg, rgba(14, 42, 71, .96) 0%, rgba(23, 57, 92, .92) 46%, rgba(18, 165, 181, .78) 100%);
  box-shadow: var(--shadow-1);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(127, 217, 224, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 217, 224, .16) 1px, transparent 1px);
  background-size: 28px 28px;
}

.media-frame img,
.media-frame svg,
.media-frame video {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ---------- 11 响应式 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
  .nav-scrim { display: none; }
}

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    width: min(85vw, 340px);
    padding: 22px 0 24px;
    transform: translateX(-102%);
    transition: transform 240ms cubic-bezier(.22, .61, .36, 1);
    box-shadow: 28px 0 64px -44px rgba(11, 33, 55, .95);
    z-index: 90;
  }

  .site-nav[data-open] { transform: translateX(0); }

  .site-nav__title {
    justify-content: flex-start;
    padding: 0 clamp(16px, 4vw, 28px) 14px;
    margin-bottom: 4px;
    font-size: 11px;
  }

  .site-nav__list { flex: 0 0 auto; }

  .nav-link {
    flex-direction: row;
    align-items: center;
    gap: 16px;
    padding: 15px clamp(16px, 4vw, 28px);
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    box-shadow: none;
  }

  .nav-link__num {
    min-width: 22px;
    font-size: 12px;
    color: var(--c-cyan-soft);
  }

  .nav-link__label {
    writing-mode: horizontal-tb;
    font-size: 16px;
    letter-spacing: .08em;
    color: #e7eef4;
  }

  .nav-link:hover,
  .nav-link[aria-current="page"] {
    background: rgba(18, 165, 181, .16);
    box-shadow: inset 3px 0 0 var(--c-cyan);
  }

  .nav-link[aria-current="page"] {
    box-shadow: inset 3px 0 0 var(--c-orange);
    background: linear-gradient(90deg, rgba(255, 122, 47, .22), rgba(255, 122, 47, 0));
  }

  .site-nav__foot {
    margin-top: 18px;
    padding: 16px clamp(16px, 4vw, 28px) 0;
    text-align: left;
  }

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

  .footer__contact { grid-template-columns: minmax(0, 1fr); }
}

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

  .notice-strip {
    flex-basis: 100%;
    order: 3;
    font-size: 12px;
  }

  .topbar__inner { gap: 8px 14px; padding-block: 9px; }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--12 { grid-template-columns: minmax(0, 1fr); }

  .col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: 1 / -1; }

  .section-head__note { margin-left: 0; }

  .footer__grid { grid-template-columns: minmax(0, 1fr); }

  .page-title { letter-spacing: .02em; }
}

/* ---------- 12 动效降级 ---------- */
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity var(--t-base), transform var(--t-base);
  }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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