/* =========================================================
   必威主页 · 共享外壳样式 /assets/site.css
   工业档案 × 产线日志：深墨蓝底、熔橙锚点、青瓷绿数据
   ========================================================= */

/* ---------- 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 { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; }
details summary { list-style: none; }
details summary::-webkit-details-marker { display: none; }

/* ---------- 变量 ---------- */
:root {
  --ink: #0B1B2B;
  --steel: #14344F;
  --black: #0A0D10;
  --white: #FFFFFF;
  --paper: #F4F6F8;
  --orange: #FF6A1A;
  --orange-deep: #C74A0B;
  --celadon: #3FA98A;
  --celadon-soft: #A8DCC9;
  --line: #5A7A93;
  --mute: #9DB6C8;
  --paper-ink: #0C1A26;
  --paper-mute: #34495C;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Songti SC", "SimSun", "Source Han Serif SC", "Noto Serif SC", Georgia, serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --max: 1280px;
  --gap: clamp(16px, 2vw, 28px);
  --bar-h: 68px;
  --bar-h-min: 54px;
  --r-lg: 28px;
  --r-md: 18px;
  --r-pill: 999px;
}

/* ---------- 基座排版 ---------- */
body {
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 0;
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--white);
}
h1 { font-size: clamp(30px, 5vw, 56px); }
h2 { font-size: clamp(24px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 26px); }
p { margin-bottom: 1.1em; line-height: 1.85; }
a { color: var(--celadon-soft); text-decoration-color: rgba(168,220,201,.45); }
a:hover { color: var(--white); }
strong { font-family: var(--font-display); font-weight: 800; }
:focus-visible { outline: 2px solid var(--orange); outline-offset: 3px; border-radius: 4px; }

/* ---------- 工具类 ---------- */
.shell { width: min(var(--max), 100% - 40px); margin-inline: auto; }
.shell--wide { width: min(1440px, 100% - 32px); }
.offset-bar { padding-top: calc(var(--bar-h) + clamp(20px, 4vw, 56px)); }
.muted { color: var(--mute); }
.mono { font-family: var(--font-mono); letter-spacing: .06em; }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: .04em; }
.stack { display: grid; gap: 14px; }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.hr { height: 1px; border: 0; background: rgba(90,122,147,.35); margin: clamp(28px, 5vw, 56px) 0; }
.breathe { height: clamp(40px, 8vw, 130px); }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.eyebrow {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .22em;
  color: var(--celadon); text-transform: uppercase;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed; top: 10px; left: 10px; z-index: 200;
  transform: translateY(-180%);
  background: var(--orange); color: var(--black);
  font-family: var(--font-display); font-weight: 800; font-size: 14px;
  padding: 10px 18px; border-radius: var(--r-pill);
  text-decoration: none;
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); color: var(--black); }

/* =========================================================
   命令栏页头
   ========================================================= */
.cmd-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  background: var(--black);
  border-bottom: 1px solid rgba(90,122,147,.38);
  transition: background .24s ease, box-shadow .24s ease;
}
.cmd-bar[data-scrolled="true"] { background: rgba(10,13,16,.97); box-shadow: 0 12px 28px rgba(0,0,0,.45); }
.cmd-bar__inner {
  width: min(1440px, 100% - 32px);
  margin-inline: auto;
  min-height: var(--bar-h);
  display: flex; align-items: center; gap: clamp(10px, 1.6vw, 26px);
  transition: min-height .24s ease;
}
.cmd-bar[data-scrolled="true"] .cmd-bar__inner { min-height: var(--bar-h-min); }

.scroll-progress {
  position: absolute; left: 0; bottom: -1px; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--orange), var(--celadon));
  z-index: 2;
}

/* 品牌 */
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; flex: 0 0 auto; }
.brand:hover { color: var(--white); }
.brand__mark {
  display: grid; place-items: center; width: 34px; height: 34px; flex: 0 0 auto;
  border-radius: 13px; background: var(--orange); color: var(--black);
  font-family: var(--font-display); font-weight: 800; font-size: 18px; line-height: 1;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__name { font-family: var(--font-display); font-weight: 800; font-size: 17px; letter-spacing: .05em; color: var(--white); }
.brand__desc { font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; color: var(--mute); }

/* 导航 */
.cmd-nav { flex: 1 1 auto; min-width: 0; }
.cmd-nav__list { display: flex; align-items: center; gap: 2px; }
.cmd-nav__item { flex: 0 0 auto; }
.cmd-nav__link {
  position: relative;
  display: inline-flex; align-items: baseline; gap: 6px;
  padding: 9px 11px; border-radius: var(--r-pill);
  color: var(--mute); text-decoration: none; white-space: nowrap;
  font-family: var(--font-display); font-size: 13.5px; letter-spacing: .02em;
  transition: color .2s ease, background-color .2s ease;
}
.cmd-nav__idx { font-family: var(--font-mono); font-size: 10px; letter-spacing: .08em; color: #567489; }
.cmd-nav__label { display: inline-block; }
.cmd-nav__link:hover { color: var(--white); background: rgba(20,52,79,.75); }
.cmd-nav__link[aria-current="page"] { color: var(--white); background: rgba(255,106,26,.12); }
.cmd-nav__link[aria-current="page"] .cmd-nav__idx { color: var(--orange); }
.cmd-nav__link[aria-current="page"]::after {
  content: ""; position: absolute; left: 11px; right: 11px; bottom: 3px; height: 2px;
  border-radius: 2px; background: var(--orange);
}
.cmd-nav__link[aria-current="page"]::before {
  content: ""; position: absolute; top: 6px; right: 6px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--orange);
}

/* 页头动作区 */
.cmd-bar__actions { display: flex; align-items: center; gap: 10px; margin-left: auto; flex: 0 0 auto; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-display); font-weight: 700; font-size: 14px;
  letter-spacing: .03em; line-height: 1.2; white-space: nowrap;
  padding: 10px 18px; border-radius: var(--r-pill);
  border: 1px solid transparent; text-decoration: none; cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.btn--anchor { background: var(--orange); color: var(--black); }
.btn--anchor:hover { background: var(--orange-deep); color: var(--white); }
.btn--ghost { background: transparent; color: var(--mute); border-color: rgba(90,122,147,.55); }
.btn--ghost:hover { color: var(--celadon-soft); border-color: var(--celadon); }
.btn--line { background: transparent; color: var(--white); border-color: rgba(255,255,255,.28); }
.btn--line:hover { color: var(--orange); border-color: var(--orange); }
.btn--block { width: 100%; }

/* 移动菜单键 */
.nav-toggle {
  display: none; align-items: center; gap: 9px;
  padding: 9px 14px; border-radius: var(--r-pill);
  background: transparent; border: 1px solid rgba(90,122,147,.55);
  color: var(--white); font-family: var(--font-display); font-size: 13px;
  letter-spacing: .06em; cursor: pointer;
}
.nav-toggle:hover { border-color: var(--orange); color: var(--orange); }
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bar { display: block; height: 2px; border-radius: 2px; background: currentColor; }
.nav-toggle__text { display: inline-block; }

/* =========================================================
   章节骨架
   ========================================================= */
.section { padding-block: clamp(52px, 8vw, 108px); }
.section--tight { padding-block: clamp(32px, 5vw, 64px); }
.section--band { background: var(--black); }
.section--steel { background: var(--steel); }
.section--paper { background: var(--paper); color: var(--paper-ink); }
.section--paper h1, .section--paper h2, .section--paper h3, .section--paper h4 { color: var(--paper-ink); }
.section--paper p, .section--paper li { color: var(--paper-mute); }
.section--paper .muted, .section--paper .lede { color: var(--paper-mute); }
.section--paper a { color: #0F6E56; }
.section--paper .sec-head__index { color: var(--orange-deep); }
.section--paper .card { background: #FFFFFF; border-color: #D6DEE6; }
.section--paper .card__title { color: var(--paper-ink); }
.section--paper .card__text { color: var(--paper-mute); }

.band {
  background: var(--black);
  border-block: 1px solid rgba(90,122,147,.34);
  padding-block: clamp(18px, 2.6vw, 30px);
}
.band__inner {
  width: min(1440px, 100% - 32px); margin-inline: auto;
  display: flex; flex-wrap: wrap; align-items: center;
  gap: clamp(12px, 3vw, 40px); justify-content: space-between;
}
.band__meta { font-family: var(--font-mono); font-size: 12px; letter-spacing: .16em; color: var(--mute); }

/* 章节表头 */
.sec-head { position: relative; display: grid; gap: 10px; margin-bottom: clamp(24px, 4vw, 46px); padding-right: 40px; }
.sec-head__index { font-family: var(--font-mono); font-size: 12px; letter-spacing: .2em; color: var(--orange); }
.sec-head__title { margin: 0; }
.sec-head__note {
  position: absolute; top: 2px; right: 0;
  writing-mode: vertical-rl; text-orientation: mixed;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .26em;
  color: var(--mute);
}
.lede { font-size: clamp(16px, 1.7vw, 19px); line-height: 1.9; color: #C6D7E4; max-width: 64ch; }

/* 面包屑 */
.crumbs { padding-block: 14px 0; }
.crumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; }
.crumbs__item { display: inline-flex; align-items: center; gap: 10px; color: var(--mute); }
.crumbs__item + .crumbs__item::before { content: "/"; color: #3D5A70; }
.crumbs__link { color: var(--mute); text-decoration: none; }
.crumbs__link:hover { color: var(--celadon-soft); }
.crumbs__current { color: var(--white); }

/* =========================================================
   栅格
   ========================================================= */
.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr); }
.grid--rail { grid-template-columns: minmax(190px, 232px) minmax(0, 1fr); align-items: start; }

/* =========================================================
   索引栏
   ========================================================= */
.rail { position: sticky; top: calc(var(--bar-h) + 24px); align-self: start; }
.rail__list { border-left: 1px solid rgba(90,122,147,.4); display: grid; gap: 1px; }
.rail__item { display: block; }
.rail__link {
  display: block; margin-left: -1px; padding: 10px 14px;
  border-left: 2px solid transparent;
  color: var(--mute); text-decoration: none;
  font-family: var(--font-display); font-size: 14px; letter-spacing: .02em;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.rail__link:hover { color: var(--white); }
.rail__link.is-active {
  color: var(--white); border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255,106,26,.14), rgba(255,106,26,0));
}

/* =========================================================
   卡片
   ========================================================= */
.card {
  display: flex; flex-direction: column; gap: 12px;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--steel);
  border: 1px solid rgba(90,122,147,.3);
  border-radius: var(--r-lg);
  transition: border-color .22s ease, transform .22s ease;
}
.card:hover { border-color: rgba(63,169,138,.6); }
.card--lg {
  border-radius: calc(var(--r-lg) + 6px);
  padding: clamp(22px, 3vw, 38px);
  background: linear-gradient(158deg, #14344F 0%, #0E2338 100%);
}
.card--flat { background: transparent; border-style: dashed; border-color: rgba(90,122,147,.45); }
.card__tag {
  align-self: flex-start;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em;
  color: var(--celadon); border: 1px solid rgba(63,169,138,.5);
  padding: 3px 10px; border-radius: var(--r-pill);
}
.card__title { font-size: clamp(18px, 2vw, 23px); margin: 0; }
.card__text { color: #C6D7E4; font-size: 15.5px; margin: 0; }
.card__meta {
  margin-top: auto; padding-top: 10px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--mute);
  border-top: 1px solid rgba(90,122,147,.28);
}

/* =========================================================
   数据与标记
   ========================================================= */
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__num {
  font-family: var(--font-mono); font-weight: 700;
  font-size: clamp(30px, 5vw, 54px); line-height: 1; letter-spacing: -.02em;
  color: var(--white); font-variant-numeric: tabular-nums;
}
.stat__unit { font-size: .42em; letter-spacing: .08em; color: var(--celadon); margin-left: 6px; }
.stat__label { font-family: var(--font-display); font-size: 13px; letter-spacing: .08em; color: var(--mute); }
.stat--anchor .stat__num { color: var(--orange); }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em;
  padding: 4px 10px; border-radius: var(--r-pill);
  border: 1px solid rgba(90,122,147,.5); color: var(--mute);
}
.tag--ok { color: var(--celadon); border-color: rgba(63,169,138,.55); background: rgba(63,169,138,.1); }
.tag--hot { color: var(--orange); border-color: rgba(255,106,26,.55); background: rgba(255,106,26,.1); }

/* =========================================================
   标签页
   ========================================================= */
.tabs { display: grid; gap: clamp(18px, 3vw, 30px); }
.tabs__list {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding-bottom: 14px; border-bottom: 1px solid rgba(90,122,147,.35);
}
.tabs__tab {
  font-family: var(--font-display); font-size: 14px; letter-spacing: .03em;
  padding: 9px 16px; border-radius: var(--r-pill);
  background: transparent; border: 1px solid rgba(90,122,147,.4);
  color: var(--mute); cursor: pointer;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}
.tabs__tab:not([aria-selected="true"]):hover { color: var(--white); border-color: var(--celadon); }
.tabs__tab[aria-selected="true"] {
  background: var(--orange); border-color: var(--orange);
  color: var(--black); font-weight: 800;
}
.tabs__panel { animation: tabIn .24s ease both; }
.tabs__panel[hidden] { display: none; }
@keyframes tabIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* =========================================================
   服务路径（技能树）
   ========================================================= */
.path { display: grid; }
.path__step {
  display: grid; grid-template-columns: auto 1fr; gap: clamp(14px, 2.2vw, 30px);
  padding: clamp(18px, 2.4vw, 28px) 0;
  border-top: 1px solid rgba(90,122,147,.28);
}
.path__step:last-child { border-bottom: 1px solid rgba(90,122,147,.28); }
.path__num {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .16em;
  color: var(--orange); padding-top: 5px; min-width: 46px;
}
.path__body { display: grid; gap: 8px; }
.path__title { margin: 0; font-size: clamp(17px, 2vw, 22px); }
.path__text { margin: 0; color: #C6D7E4; max-width: 66ch; }

/* =========================================================
   参数表
   ========================================================= */
.data-table {
  overflow-x: auto;
  border: 1px solid rgba(90,122,147,.36);
  border-radius: var(--r-md);
  background: rgba(20,52,79,.32);
}
.data-table table { width: 100%; min-width: 720px; font-size: 14px; }
.data-table th, .data-table td {
  padding: 12px 16px; text-align: left;
  border-bottom: 1px solid rgba(90,122,147,.22);
  white-space: nowrap;
}
.data-table thead th {
  position: sticky; top: 0; z-index: 3;
  background: #0A1520;
  font-family: var(--font-display); font-size: 12px; font-weight: 700;
  letter-spacing: .12em; color: var(--mute); text-transform: uppercase;
}
.data-table td { color: #D3E0EA; }
.data-table th:first-child, .data-table td:first-child {
  position: sticky; left: 0; z-index: 2; background: #0E2338; color: var(--white);
}
.data-table thead th:first-child { z-index: 4; background: #0A1520; }
.data-table tbody tr { transition: background-color .18s ease; }
.data-table tbody tr:hover { background: rgba(63,169,138,.12); }
.data-table__cap {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em;
  color: var(--mute); margin-bottom: 12px;
}

/* =========================================================
   FAQ
   ========================================================= */
.faq { border-top: 1px solid rgba(90,122,147,.32); }
.faq__item { border-bottom: 1px solid rgba(90,122,147,.32); }
.faq__q {
  display: flex; align-items: baseline; gap: 14px;
  padding: 18px 4px; cursor: pointer;
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(15px, 1.9vw, 18px); color: var(--white);
}
.faq__q::after { content: "+"; margin-left: auto; font-family: var(--font-mono); color: var(--orange); }
.faq__item[open] .faq__q::after { content: "–"; }
.faq__q:hover { color: var(--celadon-soft); }
.faq__a { padding: 0 4px 22px; color: #C6D7E4; max-width: 72ch; }
.faq__a p:last-child { margin-bottom: 0; }

/* =========================================================
   筛选胶囊
   ========================================================= */
.pill-bar { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em;
  padding: 7px 15px; border-radius: var(--r-pill);
  background: transparent; border: 1px solid rgba(90,122,147,.45);
  color: var(--mute); cursor: pointer;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}
.pill:hover { color: var(--white); border-color: var(--celadon); }
.pill[aria-pressed="true"] { background: var(--celadon); border-color: var(--celadon); color: #06231B; font-weight: 700; }

/* =========================================================
   图像容器与色块
   ========================================================= */
.frame {
  position: relative; overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid rgba(90,122,147,.32);
  background: linear-gradient(140deg, #14344F 0%, #0A1622 100%);
}
.frame__img {
  width: 100%; height: 100%; display: block; object-fit: cover;
  filter: saturate(.8) contrast(1.06) brightness(.96);
}
.frame--wide { aspect-ratio: 16 / 9; }
.frame--banner { aspect-ratio: 21 / 9; }
.frame--tall { aspect-ratio: 3 / 4; }
.frame--square { aspect-ratio: 1 / 1; }
.frame__chip {
  position: absolute; left: 14px; bottom: 14px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em;
  padding: 5px 12px; border-radius: var(--r-pill);
  background: rgba(10,13,16,.78); color: var(--celadon-soft);
  border: 1px solid rgba(63,169,138,.45);
}
.slab { position: relative; border-radius: var(--r-lg); background: var(--steel); }
.slab--orange { background: var(--orange); }
.slab--celadon { background: var(--celadon); }
.slab--slant { clip-path: polygon(0 0, 100% 0, 100% 78%, 0 100%); border-radius: 0; }

/* =========================================================
   显隐与动效
   ========================================================= */
[data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
[data-reveal].is-in { opacity: 1; transform: none; }

/* =========================================================
   页脚
   ========================================================= */
.site-foot {
  position: relative;
  background: var(--black);
  color: var(--mute);
  border-top: 1px solid rgba(90,122,147,.36);
  padding-block: clamp(40px, 6vw, 76px) clamp(24px, 3vw, 36px);
}
.site-foot::before {
  content: ""; position: absolute; top: -1px; left: 0;
  width: clamp(90px, 20vw, 260px); height: 3px; background: var(--orange);
}
.site-foot__inner { display: grid; gap: clamp(28px, 4vw, 48px); }
.site-foot__top {
  display: grid; gap: clamp(26px, 4vw, 56px);
  grid-template-columns: minmax(260px, 1fr) minmax(0, 1.65fr);
  align-items: start;
}
.site-foot__brand { display: grid; gap: 12px; justify-items: start; }
.site-foot__kicker { font-family: var(--font-mono); font-size: 11px; letter-spacing: .22em; color: var(--celadon); margin: 0; }
.site-foot__wordmark {
  margin: 0; font-family: var(--font-display); font-weight: 800;
  font-size: clamp(38px, 7vw, 78px); line-height: .95; letter-spacing: -.04em;
  color: rgba(255,255,255,.08);
}
.site-foot__tagline { margin: 0; color: #C6D7E4; font-size: 15.5px; max-width: 34ch; line-height: 1.8; }
.site-foot__cta { margin-top: 6px; }
.site-foot__grid {
  display: grid; gap: clamp(20px, 3vw, 36px);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.foot-col { display: grid; gap: 14px; align-content: start; }
.foot-col__title {
  display: flex; align-items: baseline; gap: 10px; margin: 0;
  font-family: var(--font-display); font-size: 13px; font-weight: 700;
  letter-spacing: .16em; color: var(--white);
  padding-bottom: 10px; border-bottom: 1px solid rgba(90,122,147,.3);
}
.foot-col__no { font-family: var(--font-mono); font-size: 11px; color: var(--orange); letter-spacing: .1em; }
.foot-col__list { display: grid; gap: 9px; }
.foot-col__item { display: block; }
.foot-col__link {
  display: inline-block; color: var(--mute); text-decoration: none;
  font-family: var(--font-display); font-size: 14.5px;
  transition: color .2s ease, transform .2s ease;
}
.foot-col__link:hover { color: var(--orange); transform: translateX(3px); }
.foot-col__line { font-size: 14px; line-height: 1.75; color: #A9C0D1; font-family: var(--font-body); }
.foot-col__line--note { color: var(--mute); font-size: 13px; }

.site-foot__meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 22px;
  padding-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid rgba(90,122,147,.28);
}
.site-foot__legal { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.site-foot__legal-item { display: inline-flex; }
.site-foot__legal-link {
  color: var(--mute); text-decoration: none;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em;
}
.site-foot__legal-link:hover { color: var(--celadon-soft); }
.site-foot__icp, .site-foot__copy {
  margin: 0; font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; color: #7B95A9;
}
.site-foot__copy { margin-left: auto; }

.to-top {
  opacity: 0; pointer-events: none;
  padding: 9px 16px; border-radius: var(--r-pill);
  background: transparent; border: 1px solid rgba(90,122,147,.5);
  color: var(--mute); cursor: pointer;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em;
  transition: opacity .22s ease, color .2s ease, border-color .2s ease;
}
.to-top[data-visible="true"] { opacity: 1; pointer-events: auto; }
.to-top:hover { color: var(--orange); border-color: var(--orange); }

/* =========================================================
   断点
   ========================================================= */
@media (max-width: 1180px) {
  .cmd-bar__utility { display: none; }
  .brand__desc { display: none; }
}

@media (max-width: 1024px) {
  .site-foot__top { grid-template-columns: 1fr; }
  .grid--asym { grid-template-columns: 1fr; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .cmd-nav {
    position: absolute; top: 100%; left: 0; right: 0;
    background: linear-gradient(180deg, #0A0D10 0%, #0B1B2B 100%);
    border-bottom: 1px solid rgba(90,122,147,.42);
    padding: 16px clamp(16px, 5vw, 32px) 26px;
    max-height: calc(100vh - var(--bar-h));
    overflow-y: auto;
    opacity: 0; visibility: hidden; transform: translateY(-10px);
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
  }
  .cmd-nav[data-open] { opacity: 1; visibility: visible; transform: translateY(0); }
  .cmd-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .cmd-nav__link {
    display: flex; align-items: baseline; gap: 12px;
    padding: 14px 12px; border-radius: 14px;
    border-bottom: 1px solid rgba(90,122,147,.18);
    font-size: 16px;
  }
  .cmd-nav__link[aria-current="page"] { border-radius: 14px; }
  .cmd-nav__link[aria-current="page"]::after { left: 12px; right: auto; width: 22px; bottom: 8px; }
  .grid--2, .grid--3, .grid--rail { grid-template-columns: 1fr; }
  .rail { position: static; }
  .site-foot__grid { grid-template-columns: 1fr 1fr; }
  .site-foot__copy { margin-left: 0; }
}

@media (max-width: 640px) {
  .shell { width: min(var(--max), 100% - 28px); }
  .cmd-bar__inner, .band__inner, .site-foot__inner { width: min(1440px, 100% - 28px); width: auto; }
  .cmd-bar__inner { width: min(1440px, 100% - 28px); }
  .cmd-bar__cta { font-size: 12px; padding: 9px 13px; }
  .brand__name { font-size: 15px; }
  .site-foot__grid { grid-template-columns: 1fr; }
  .sec-head { padding-right: 0; }
  .sec-head__note { position: static; writing-mode: horizontal-tb; letter-spacing: .18em; }
  .tabs__tab { font-size: 13px; padding: 8px 13px; }
  .path__step { grid-template-columns: 1fr; gap: 8px; }
  .path__num { padding-top: 0; }
}

/* =========================================================
   可访问性偏好
   ========================================================= */
@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; }
  .tabs__panel { animation: none; }
}