/* =========================================================
   亿万28链接 · 夜航地图共享样式 /assets/site.css
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }

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

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

:root {
  --ink-950: #07131F;
  --ink-900: #0B1B2B;
  --ink-800: #122A3F;
  --ink-700: #1E3A4F;

  --cyan: #00E5C7;
  --cyan-soft: #7CF5E4;
  --gold: #F2B441;
  --coral: #FF6B5A;

  --mist: #D7E6EA;
  --mist-strong: #EDF7F8;
  --mist-dim: rgba(215, 230, 234, .66);
  --paper: #F4F7F5;

  --line: rgba(215, 230, 234, .14);
  --line-cyan: rgba(0, 229, 199, .3);

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

  --r-pill: 999px;
  --r-xl: 32px;
  --r-lg: 22px;
  --r-md: 14px;

  --shell-max: 1240px;
  --gutter: clamp(16px, 3.6vw, 40px);
  --header-h: 76px;
  --ease: cubic-bezier(.4, 0, .2, 1);
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: clamp(15px, .35vw + 14px, 16.5px);
  line-height: 1.75;
  color: var(--mist);
  background-color: var(--ink-950);
  background-image:
    radial-gradient(1180px 520px at 6% -10%, rgba(0, 229, 199, .11), transparent 62%),
    radial-gradient(900px 460px at 98% 0%, rgba(242, 180, 65, .08), transparent 58%),
    repeating-linear-gradient(118deg, rgba(30, 58, 79, .32) 0 1px, transparent 1px 108px);
  -webkit-font-smoothing: antialiased;
}

main { flex: 1 0 auto; display: block; }

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--mist-strong);
  text-wrap: balance;
}
h1 { font-size: clamp(30px, 5.6vw, 58px); letter-spacing: -.03em; line-height: 1.04; }
h2 { font-size: clamp(21px, 2.7vw, 33px); }
h3 { font-size: clamp(16px, 1.5vw, 20px); }
h4 { font-size: 15px; }

::selection { background: rgba(0, 229, 199, .3); color: #FFFFFF; }

:focus-visible {
  outline: 2px solid var(--cyan-soft);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 跳转条 ---------- */
.skip-link {
  position: absolute;
  left: 14px;
  top: -72px;
  z-index: 130;
  padding: 12px 22px;
  border-radius: var(--r-pill);
  background: var(--cyan);
  color: #04141C;
  font-weight: 800;
  font-size: 14px;
  transition: top .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { top: 14px; }

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

/* =========================================================
   页头
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(9, 22, 35, .9);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid rgba(0, 229, 199, .16);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 229, 199, 0), var(--cyan) 20%, var(--gold) 66%, rgba(242, 180, 65, 0));
  opacity: .8;
  pointer-events: none;
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px clamp(12px, 2vw, 28px);
  min-height: var(--header-h);
  padding-block: 10px;
}

/* 品牌锁定标识 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding: 4px 0;
}
.brand-node {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 199, .14), 0 0 16px rgba(0, 229, 199, .6);
}
.brand-node::after {
  content: "";
  position: absolute;
  inset: -7px;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 199, .32);
}
.brand-text { display: flex; flex-direction: column; gap: 1px; line-height: 1.2; }
.brand-name {
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 900;
  letter-spacing: .02em;
  color: var(--mist-strong);
  transition: color .25s var(--ease);
}
.brand-latin {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .3em;
  color: var(--cyan-soft);
  opacity: .85;
}
.brand-tag {
  margin-left: 10px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist-dim);
  white-space: nowrap;
}
.brand:hover .brand-name,
.brand:focus-visible .brand-name { color: var(--cyan-soft); }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  flex: none;
  padding: 9px 16px 9px 13px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-cyan);
  background: rgba(0, 229, 199, .07);
  color: var(--mist-strong);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  cursor: pointer;
  transition: background .25s var(--ease), border-color .25s var(--ease);
}
.nav-toggle:hover { background: rgba(0, 229, 199, .14); border-color: var(--cyan); }
.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  height: 14px;
}
.nav-toggle-bars i {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child { transform: translateY(-3px) rotate(-45deg); }

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(10px, 1.4vw, 20px);
  flex: 1 1 auto;
}
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  color: rgba(215, 230, 234, .76);
  transition: color .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}
.nav-link::before {
  content: "";
  flex: none;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: .5;
  transition: opacity .25s var(--ease), transform .25s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--cyan-soft);
  background: rgba(0, 229, 199, .08);
  border-color: rgba(0, 229, 199, .32);
}
.nav-link:hover::before,
.nav-link:focus-visible::before { opacity: 1; transform: scale(1.3); }
.nav-link[aria-current="page"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04141C;
  font-weight: 800;
  box-shadow: 0 0 24px -8px rgba(0, 229, 199, .9);
}
.nav-link[aria-current="page"]::before { background: #04141C; opacity: .9; }

.nav-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding-left: clamp(10px, 1.6vw, 20px);
  border-left: 1px solid var(--line);
}

/* =========================================================
   按钮
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.1;
  white-space: nowrap;
  cursor: pointer;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}
.btn-sm { padding: 9px 16px; font-size: 12.5px; }
.btn-primary {
  background: var(--cyan);
  color: #04141C;
  box-shadow: 0 0 0 1px rgba(0, 229, 199, .4), 0 12px 26px -16px rgba(0, 229, 199, .95);
}
.btn-primary:hover,
.btn-primary:focus-visible { background: var(--cyan-soft); transform: translateY(-1px); }
.btn-gold { background: var(--gold); color: #1A1204; }
.btn-gold:hover,
.btn-gold:focus-visible { background: #F8CA6C; transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  border-color: rgba(215, 230, 234, .22);
  color: var(--mist);
}
.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan-soft);
  background: rgba(0, 229, 199, .08);
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(44px, 6vw, 92px);
  padding-top: clamp(38px, 5vw, 66px);
  background: linear-gradient(180deg, rgba(11, 27, 43, .97), var(--ink-950) 88%);
  border-top: 1px solid rgba(0, 229, 199, .18);
}
.site-footer::before {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -38%;
  width: min(620px, 74vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: repeating-radial-gradient(circle at center, rgba(0, 229, 199, .13) 0 1px, transparent 1px 38px);
  -webkit-mask-image: radial-gradient(circle, #000 28%, transparent 74%);
  mask-image: radial-gradient(circle, #000 28%, transparent 74%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.5fr .9fr .9fr .95fr 1.4fr;
  gap: clamp(22px, 3vw, 44px);
  align-items: start;
}

.footer-brand { display: flex; flex-direction: column; gap: 12px; }
.footer-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: .02em;
  color: var(--mist-strong);
  transition: color .25s var(--ease);
}
.footer-node {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 180, 65, .14), 0 0 14px rgba(242, 180, 65, .6);
}
.footer-lockup:hover,
.footer-lockup:focus-visible { color: var(--gold); }
.footer-tag {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .24em;
  color: var(--cyan-soft);
}
.footer-note {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist-dim);
  max-width: 36ch;
}
.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 7px 14px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(242, 180, 65, .34);
  background: rgba(242, 180, 65, .08);
  font-size: 12px;
  color: #F6D9A0;
}
.status-dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 10px rgba(242, 180, 65, .95);
}

.footer-col { min-width: 0; }
.footer-col-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold);
}
.footer-col-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(242, 180, 65, .5), transparent);
}
.footer-links { display: flex; flex-direction: column; gap: 9px; }
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(215, 230, 234, .8);
  transition: color .22s var(--ease), transform .22s var(--ease);
}
.footer-link::before {
  content: "";
  flex: none;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--cyan);
  opacity: .55;
  transition: opacity .22s var(--ease), transform .22s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible { color: var(--cyan-soft); transform: translateX(3px); }
.footer-link:hover::before,
.footer-link:focus-visible::before { opacity: 1; transform: scale(1.5); }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(0, 229, 199, .22);
  background: rgba(18, 42, 63, .55);
}
.contact-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}
.contact-item { display: flex; flex-direction: column; gap: 3px; }
.contact-label {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: rgba(215, 230, 234, .5);
}
.contact-value {
  font-size: 13.5px;
  color: var(--mist-strong);
  word-break: break-word;
}
.contact-value--mono { font-family: var(--font-mono); letter-spacing: .02em; }
.contact-hours {
  font-size: 12px;
  color: rgba(215, 230, 234, .55);
  border-top: 1px dashed rgba(215, 230, 234, .16);
  padding-top: 12px;
}

.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  margin-top: 4px;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(0, 229, 199, .3);
  background: rgba(0, 229, 199, .07);
  color: var(--cyan-soft);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .22s var(--ease), border-color .22s var(--ease), color .22s var(--ease);
}
.copy-chip:hover,
.copy-chip:focus-visible { background: rgba(0, 229, 199, .16); border-color: var(--cyan); }
.copy-chip.is-copied {
  border-color: rgba(242, 180, 65, .6);
  background: rgba(242, 180, 65, .14);
  color: var(--gold);
}

.footer-base {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(30px, 4vw, 52px);
  padding-block: 18px 24px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: rgba(215, 230, 234, .55);
}
.footer-icp { font-family: var(--font-mono); letter-spacing: .02em; }
.footer-legal { max-width: 54ch; }

/* =========================================================
   页面通用组件
   ========================================================= */
.section { padding-block: clamp(34px, 5vw, 76px); }
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin-bottom: clamp(18px, 3vw, 32px);
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}
.kicker::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--cyan);
}
.chapter-no {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 56px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
  text-shadow: 0 0 32px rgba(242, 180, 65, .28);
}
.lede {
  max-width: 46ch;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.85;
  color: rgba(215, 230, 234, .82);
}

.breadcrumb {
  padding-block: 14px 0;
  font-size: 12.5px;
  color: rgba(215, 230, 234, .55);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.breadcrumb li { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb li + li::before { content: "/"; color: rgba(0, 229, 199, .5); }
.breadcrumb a {
  color: rgba(215, 230, 234, .72);
  border-bottom: 1px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--cyan-soft); border-bottom-color: rgba(0, 229, 199, .5); }
.breadcrumb [aria-current="page"] { color: var(--gold); }

.divider {
  height: 1px;
  border: 0;
  margin: clamp(24px, 4vw, 44px) 0;
  background: linear-gradient(90deg, rgba(0, 229, 199, .5), rgba(242, 180, 65, .32), transparent);
}

/* 网格 */
.grid { display: grid; gap: clamp(14px, 2vw, 24px); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }

/* 卡片 */
.card {
  position: relative;
  overflow: hidden;
  padding: clamp(16px, 2vw, 26px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(18, 42, 63, .92), rgba(11, 27, 43, .92));
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.card::after {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at 50% 50%, rgba(0, 229, 199, .16), transparent 62%);
  opacity: 0;
  transform: scale(.6);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  pointer-events: none;
}
.card:hover { border-color: rgba(0, 229, 199, .42); transform: translateY(-3px); }
.card:hover::after { opacity: 1; transform: scale(1); }
.card > * { position: relative; z-index: 1; }

/* 标签 */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(0, 229, 199, .32);
  background: rgba(0, 229, 199, .08);
  color: var(--cyan-soft);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
}
.chip--gold {
  border-color: rgba(242, 180, 65, .42);
  background: rgba(242, 180, 65, .1);
  color: #F6D9A0;
}
.chip--alert {
  border-color: rgba(255, 107, 90, .45);
  background: rgba(255, 107, 90, .12);
  color: #FFB3A9;
}

/* 条目列表 */
.node-list { display: flex; flex-direction: column; gap: 10px; }
.node-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: rgba(215, 230, 234, .84);
}
.node-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(0, 229, 199, .6);
}

/* 勾选项 */
.check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(18, 42, 63, .5);
  transition: border-color .22s var(--ease), background .22s var(--ease);
}
.check-item:hover { border-color: rgba(0, 229, 199, .34); }
.check-item input {
  -webkit-appearance: none;
  appearance: none;
  flex: none;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  border-radius: 7px;
  border: 1px solid rgba(0, 229, 199, .45);
  background: rgba(7, 19, 31, .75);
  cursor: pointer;
  position: relative;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.check-item input:checked { background: var(--cyan); border-color: var(--cyan); }
.check-item input:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: 2px solid #04141C;
  border-top: 0;
  border-left: 0;
  transform: rotate(42deg);
}
.check-item span { font-size: 14px; color: rgba(215, 230, 234, .86); }
.check-item input:checked + span { color: var(--mist-strong); }

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(11, 27, 43, .7);
}
.data-table { width: 100%; min-width: 560px; font-size: 13.5px; }
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(215, 230, 234, .08);
  vertical-align: top;
}
.data-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(18, 42, 63, .8);
}
.data-table td { color: rgba(215, 230, 234, .84); }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: rgba(0, 229, 199, .05); }

/* 折叠清单 */
.details {
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(18, 42, 63, .45);
  overflow: hidden;
}
.details + .details { margin-top: 10px; }
.details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 18px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--mist-strong);
  cursor: pointer;
  list-style: none;
  transition: background .22s var(--ease);
}
.details summary::-webkit-details-marker { display: none; }
.details summary:hover { background: rgba(0, 229, 199, .06); }
.details summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .25s var(--ease);
}
.details[open] summary { border-bottom: 1px solid rgba(215, 230, 234, .1); }
.details[open] summary::after { transform: rotate(45deg); }
.details-body { padding: 14px 18px 18px; font-size: 14px; color: rgba(215, 230, 234, .82); }

/* 章节节点轨 */
.node-rail {
  display: flex;
  flex-direction: column;
  border-left: 1px solid rgba(0, 229, 199, .28);
}
.node-rail a {
  position: relative;
  display: block;
  padding: 9px 0 9px 20px;
  font-size: 13px;
  color: rgba(215, 230, 234, .62);
  transition: color .22s var(--ease);
}
.node-rail a::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid rgba(0, 229, 199, .45);
  transition: background .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
}
.node-rail a:hover,
.node-rail a:focus-visible { color: var(--cyan-soft); }
.node-rail a.is-active { color: var(--gold); }
.node-rail a.is-active::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(0, 229, 199, .85);
}

/* 图片 / 示意图容器 */
.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-xl);
  border: 1px solid rgba(0, 229, 199, .22);
  background: linear-gradient(160deg, #0B1B2B, #122A3F 58%, #07131F);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-radial-gradient(circle at 74% 28%, rgba(0, 229, 199, .14) 0 1px, transparent 1px 30px);
  opacity: .85;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(0, 229, 199, .12), transparent 46%, rgba(242, 180, 65, .14));
}
.media-frame img,
.media-frame svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame figcaption {
  position: absolute;
  z-index: 2;
  inset: auto 0 0 0;
  padding: 14px 18px;
  font-size: 12px;
  color: rgba(215, 230, 234, .88);
  background: linear-gradient(0deg, rgba(7, 19, 31, .94), transparent);
}
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* 显现与进度 */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .65s var(--ease), transform .65s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 90;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .12s linear;
  pointer-events: none;
}

.copy-status {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1100px) {
  .footer-inner { grid-template-columns: 1.4fr .9fr .9fr 1.3fr; }
  .footer-contact { grid-column: 4; grid-row: span 2; }
}

@media (max-width: 960px) {
  .header-inner { min-height: 64px; }
  .brand-tag { display: none; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    order: 3;
    flex: 1 0 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    border-top: 1px solid transparent;
    transition: max-height .45s var(--ease), opacity .32s var(--ease), visibility .32s var(--ease), border-color .32s var(--ease);
  }
  .site-nav[data-open="true"] {
    max-height: min(72vh, 560px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    padding-block: 14px 14px;
    border-top-color: rgba(0, 229, 199, .2);
  }

  .nav-list {
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 8px;
    padding-bottom: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 229, 199, .4) transparent;
  }
  .nav-list::-webkit-scrollbar { height: 4px; }
  .nav-list::-webkit-scrollbar-thumb { background: rgba(0, 229, 199, .4); border-radius: 4px; }
  .nav-link { flex: 0 0 auto; padding: 10px 15px; font-size: 13px; }

  .nav-tools {
    flex-wrap: wrap;
    padding-left: 0;
    padding-top: 12px;
    border-left: 0;
    border-top: 1px dashed rgba(215, 230, 234, .16);
  }
  .nav-tools .btn { flex: 1 1 auto; }

  .footer-inner { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; grid-row: auto; }
}

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

@media (max-width: 680px) {
  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand,
  .footer-contact { grid-column: 1 / -1; }
  .footer-base { flex-direction: column; align-items: flex-start; gap: 8px; }
}

@media (max-width: 620px) {
  .grid-2,
  .grid-3 { grid-template-columns: minmax(0, 1fr); }
  .media-frame { border-radius: var(--r-lg); }
  .footer-col-title { letter-spacing: .18em; }
}

/* =========================================================
   动效降级
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .card:hover { transform: none; }
  .footer-link:hover { transform: none; }
  .scroll-progress { transition: none; }
}