/* ==========================================================================
   /assets/site.css — 凡国网址服务 共享外壳
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--bar-h, 76px) + 24px);
}

:root {
  --ink: #0E2A47;
  --ink-deep: #081A2E;
  --signal: #FF6B35;
  --mist: #D9F0EC;
  --teal: #00A88F;
  --paper: #F7F4EC;
  --char: #1B1F24;
  --fog: #E6E9ED;
  --archive: #5B4B8A;
  --amber: #B45309;

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

  --bar-h: 76px;
  --rail-w: 264px;
  --shell-max: 1180px;
  --gutter: clamp(18px, 3.6vw, 52px);
  --radius: 2px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --line: 1px solid rgba(14, 42, 71, .16);
  --shadow-paper: 0 1px 0 rgba(8, 26, 46, .06), 0 22px 40px -34px rgba(8, 26, 46, .5);
}

body {
  margin: 0;
  padding-top: var(--bar-h);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: .01em;
  color: var(--char);
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, rgba(14, 42, 71, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(14, 42, 71, .045) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: 0 0;
}

/* ---------- 排版 ---------- */

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--ink);
}

h1 { font-size: clamp(2.6rem, 6vw, 5.6rem); line-height: 1.02; }
h2 { font-size: clamp(1.5rem, 3vw, 2.6rem); }
h3 { font-size: clamp(1.08rem, 1.6vw, 1.35rem); letter-spacing: -.01em; }
h4 { font-size: 1rem; letter-spacing: 0; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

strong { color: var(--ink); font-weight: 800; }

small { font-size: .8rem; }

ul, ol { margin: 0 0 1em; padding-left: 1.25em; }
li { margin-bottom: .35em; }

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: .88em;
  padding: .12em .38em;
  background: rgba(14, 42, 71, .07);
  border: var(--line);
  border-radius: var(--radius);
}

hr {
  border: 0;
  border-top: var(--line);
  margin: 2em 0;
}

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
  border-radius: 1px;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--teal);
}

/* ---------- 跳至主要内容 ---------- */

.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 400;
  padding: .78em 1.2em;
  background: var(--signal);
  color: var(--ink-deep);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .88rem;
  letter-spacing: .02em;
  transform: translateY(-140%);
  transition: transform .18s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid var(--paper);
  outline-offset: -6px;
}

/* ---------- 头部外壳 ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
}

.header__bar {
  position: relative;
  z-index: 230;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  height: var(--bar-h);
  padding-inline: clamp(14px, 2.4vw, 28px);
  background: var(--ink);
  color: var(--paper);
  border-bottom: 3px solid var(--ink-deep);
}

.header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 3px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

/* 品牌 */

.brand {
  display: inline-flex;
  align-items: center;
  gap: .72rem;
  min-width: 0;
  color: var(--paper);
}

.brand:hover { color: var(--paper); }

.brand__mark {
  position: relative;
  flex: none;
  width: 40px;
  height: 40px;
  border: 1.5px solid var(--signal);
  color: var(--signal);
}

.brand__mark::before,
.brand__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.brand__mark::before { width: 18px; height: 1.5px; }
.brand__mark::after { width: 1.5px; height: 18px; }

.brand:hover .brand__mark {
  background: var(--signal);
  color: var(--ink-deep);
}

.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.2;
}

.brand__line {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  letter-spacing: .01em;
  white-space: nowrap;
}

.brand__note {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .1em;
  color: rgba(247, 244, 236, .58);
  white-space: nowrap;
}

/* 版本刻度 */

.header__meters {
  display: flex;
  align-items: stretch;
  border-left: 1px solid rgba(247, 244, 236, .16);
}

.meter {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: .1em;
  padding: .2em .95em;
  border-right: 1px solid rgba(247, 244, 236, .16);
  font-family: var(--font-mono);
}

.meter__k {
  font-size: .56rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(247, 244, 236, .52);
  white-space: nowrap;
}

.meter__v {
  font-size: .84rem;
  letter-spacing: .04em;
  color: var(--paper);
  white-space: nowrap;
}

.meter--state .meter__v {
  display: inline-flex;
  align-items: center;
  gap: .42em;
  color: var(--teal);
}

.meter--state .meter__v::before {
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  background: var(--teal);
}

/* 头部按钮 */

.header__actions {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin-left: auto;
}

/* 抽屉开关 */

.nav-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  padding: .52rem .72rem;
  background: transparent;
  color: var(--paper);
  border: 1.5px solid rgba(247, 244, 236, .38);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

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

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform .2s var(--ease);
}

.site-header[data-open] .nav-toggle__bars span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__bars span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

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

/* 遮罩 */

.header__scrim {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(8, 26, 46, .58);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s var(--ease);
}

/* ---------- 侧边轨道导航 ---------- */

.site-rail {
  position: fixed;
  top: var(--bar-h);
  left: 0;
  bottom: 0;
  z-index: 220;
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.8vh, 22px);
  width: var(--rail-w);
  padding: clamp(16px, 2.2vw, 26px) 0 clamp(16px, 2.6vh, 26px);
  background: var(--ink);
  color: var(--paper);
  border-right: 1px solid rgba(247, 244, 236, .14);
  overflow-y: auto;
  overscroll-behavior: contain;
  transition: transform .28s var(--ease);
}

.rail__caption {
  margin: 0;
  padding-inline: clamp(16px, 2vw, 26px);
  font-family: var(--font-mono);
  font-size: .58rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(247, 244, 236, .42);
}

.rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.rail__item + .rail__item {
  border-top: 1px solid rgba(247, 244, 236, .1);
}

.rail__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: .7rem;
  padding: .74em clamp(16px, 2vw, 26px);
  color: rgba(247, 244, 236, .82);
  border-left: 3px solid transparent;
  transition: background-color .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease);
}

.rail__link:hover {
  background: rgba(217, 240, 236, .09);
  color: var(--paper);
  border-left-color: var(--signal);
}

.rail__num {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .1em;
  color: rgba(247, 244, 236, .4);
}

.rail__label {
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .02em;
}

.rail__arrow {
  font-family: var(--font-mono);
  font-size: .85rem;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity .16s var(--ease), transform .16s var(--ease);
}

.rail__link:hover .rail__arrow {
  opacity: 1;
  transform: translateX(0);
}

.rail__link[aria-current="page"] {
  background: var(--ink-deep);
  color: var(--paper);
  border-left-color: var(--teal);
}

.rail__link[aria-current="page"] .rail__num { color: var(--teal); }

.rail__link[aria-current="page"] .rail__arrow {
  opacity: 1;
  transform: none;
  color: var(--signal);
}

.rail__foot {
  display: grid;
  gap: .6em;
  margin-top: auto;
  padding: clamp(12px, 2vw, 20px) clamp(16px, 2vw, 26px) 0;
  border-top: 1px solid rgba(247, 244, 236, .14);
}

.rail__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .58rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(247, 244, 236, .42);
}

.rail__scale {
  display: flex;
  align-items: flex-end;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.rail__scale li {
  flex: 1;
  margin: 0;
  padding-top: .42em;
  border-top: 2px solid rgba(247, 244, 236, .22);
  font-family: var(--font-mono);
  font-size: .66rem;
  text-align: center;
  color: rgba(247, 244, 236, .38);
}

.rail__scale li[data-current] {
  border-top-color: var(--signal);
  color: var(--paper);
}

.rail__cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5em;
  margin-top: .35em;
  padding: .64em .85em;
  background: var(--signal);
  color: var(--ink-deep);
  font-weight: 800;
  font-size: .84rem;
  letter-spacing: .02em;
  transition: background-color .16s var(--ease), color .16s var(--ease);
}

.rail__cta:hover {
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 页脚 ---------- */

.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 112px);
  background: var(--ink-deep);
  color: var(--paper);
  border-top: 6px solid var(--ink);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(217, 240, 236, .07) 1px, transparent 1px),
    linear-gradient(rgba(217, 240, 236, .07) 1px, transparent 1px);
  background-size: 96px 96px;
}

.footer__inner {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(34px, 5vw, 64px) var(--gutter) clamp(18px, 2.6vw, 30px);
}

.footer__top {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  grid-template-columns: 1fr;
  padding-bottom: clamp(20px, 3vw, 32px);
  border-bottom: 1px solid rgba(247, 244, 236, .16);
}

.footer__brand { min-width: 0; }

.footer__mark {
  margin: 0 0 .32em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  letter-spacing: -.02em;
  line-height: 1.15;
  color: var(--paper);
}

.footer__desc {
  max-width: 34ch;
  margin: 0 0 1.1em;
  font-size: .88rem;
  line-height: 1.7;
  color: rgba(247, 244, 236, .62);
}

.footer__badges {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: 0;
}

.footer__reach {
  display: grid;
  gap: .95em;
  align-content: start;
  min-width: 0;
}

.footer__contacts {
  display: grid;
  gap: .6em 1.2em;
  grid-template-columns: 1fr;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer__contact {
  display: flex;
  flex-direction: column;
  gap: .1em;
  margin: 0;
  padding-left: .8em;
  border-left: 2px solid rgba(247, 244, 236, .22);
  min-width: 0;
}

.footer__k {
  font-family: var(--font-mono);
  font-size: .58rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(247, 244, 236, .48);
}

.footer__v {
  font-size: .88rem;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.footer__note {
  margin: 0;
  max-width: 46ch;
  font-size: .78rem;
  line-height: 1.65;
  color: rgba(247, 244, 236, .55);
}

.footer__grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
  grid-template-columns: 1fr;
  align-items: start;
}

.footer__col {
  display: grid;
  gap: .7em;
  align-content: start;
  min-width: 0;
}

.footer__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(247, 244, 236, .55);
}

.footer__links {
  display: grid;
  gap: .45em;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer__links li { margin: 0; }

.footer__links a {
  display: inline-flex;
  align-items: center;
  gap: .45em;
  font-size: .9rem;
  color: rgba(247, 244, 236, .86);
  transition: color .16s var(--ease);
}

.footer__links a::before {
  content: "";
  width: 6px;
  height: 1px;
  background: currentColor;
  opacity: .5;
  transition: width .16s var(--ease), opacity .16s var(--ease);
}

.footer__links a:hover { color: var(--signal); }
.footer__links a:hover::before { width: 13px; opacity: 1; }

.footer__col--anchor {
  padding: clamp(15px, 2vw, 22px);
  background: var(--signal);
  color: var(--ink-deep);
  box-shadow: 6px 6px 0 rgba(217, 240, 236, .18);
}

.footer__col--anchor .footer__title { color: var(--ink-deep); }

.footer__anchor-note {
  margin: -.2em 0 0;
  font-size: .76rem;
  line-height: 1.6;
  color: rgba(8, 26, 46, .74);
}

.footer__anchor-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6em;
  padding: .62em .72em;
  background: var(--ink-deep);
  color: var(--paper);
  font-weight: 800;
  font-size: .86rem;
  letter-spacing: .01em;
  transition: background-color .16s var(--ease), color .16s var(--ease);
}

.footer__anchor-link:hover {
  background: var(--paper);
  color: var(--ink);
}

.footer__col--anchor .footer__links a { color: var(--ink-deep); font-weight: 700; }
.footer__col--anchor .footer__links a:hover { color: var(--ink); }
.footer__col--anchor .footer__links a:hover::before { opacity: 1; }

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .8em 1.6em;
  padding-top: clamp(16px, 2.4vw, 24px);
  border-top: 1px solid rgba(247, 244, 236, .16);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: rgba(247, 244, 236, .58);
}

.footer__meta { margin: 0; }

.to-top {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: .5em .85em;
  background: transparent;
  color: rgba(247, 244, 236, .72);
  border: 1px solid rgba(247, 244, 236, .3);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: .5;
  transition: opacity .2s var(--ease), color .16s var(--ease), border-color .16s var(--ease);
}

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

.to-top:hover {
  color: var(--signal);
  border-color: var(--signal);
  opacity: 1;
}

/* ---------- 通用按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: .55em;
  padding: .72em 1.15em;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .88rem;
  line-height: 1.2;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .16s var(--ease), background-color .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.btn:hover { transform: translate(-1px, -1px); }

.btn--signal {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink-deep);
  box-shadow: 3px 3px 0 var(--ink-deep);
}

.btn--signal:hover {
  background: var(--signal);
  color: var(--ink-deep);
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--ink-deep);
}

.btn--ghost {
  border-color: rgba(247, 244, 236, .42);
  color: var(--paper);
}

.btn--ghost:hover {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}

/* ---------- 标签 ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .32em .58em;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  line-height: 1.4;
  white-space: nowrap;
}

.tag--signal { color: var(--signal); }
.tag--teal { color: var(--teal); }
.tag--mist {
  color: var(--mist);
  border-color: rgba(217, 240, 236, .42);
}
.tag--archive {
  color: var(--archive);
  border-color: rgba(91, 75, 138, .5);
  background: rgba(91, 75, 138, .08);
}

.site-footer .tag--archive {
  color: #ab9cd8;
  border-color: rgba(171, 156, 216, .5);
  background: rgba(171, 156, 216, .08);
}

/* ---------- 容器与网格 ---------- */

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

.grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 32px);
  grid-template-columns: 1fr;
}

/* ---------- 章节头 ---------- */

.section { padding-block: clamp(44px, 6.5vw, 88px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5em 1.1em;
  margin-bottom: clamp(18px, 2.4vw, 30px);
}

.section__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--signal);
}

.section__title { margin: 0; }

.section__lead {
  flex-basis: 100%;
  max-width: 62ch;
  margin: .35em 0 0;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(27, 31, 36, .78);
}

/* ---------- 面板 ---------- */

.panel {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--paper);
  border: var(--line);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 rgba(14, 42, 71, .07);
}

.panel--mist {
  background: var(--mist);
  border-color: rgba(14, 42, 71, .18);
}

/* ---------- 图片容器 ---------- */

.media {
  display: block;
  margin: 0;
  background: var(--paper);
  border: var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-paper);
  overflow: hidden;
}

.media__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--mist);
  background-image:
    linear-gradient(rgba(14, 42, 71, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 42, 71, .09) 1px, transparent 1px);
  background-size: 32px 32px;
}

.media__frame > img,
.media__frame > svg,
.media__frame > picture {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  padding: .58em .82em;
  background: var(--paper);
  border-top: var(--line);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .06em;
  line-height: 1.5;
  color: rgba(27, 31, 36, .72);
}

.media--tall .media__frame { aspect-ratio: 3 / 4; }
.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--phone .media__frame { aspect-ratio: 9 / 16; max-width: 320px; margin-inline: auto; }

/* ---------- 面包屑 ---------- */

.breadcrumb { margin-bottom: clamp(14px, 2vw, 22px); }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(27, 31, 36, .6);
}

.breadcrumb__list li {
  display: inline-flex;
  align-items: center;
  gap: .45em;
  margin: 0;
}

.breadcrumb__list li + li::before {
  content: "›";
  color: var(--signal);
  font-size: 1em;
}

.breadcrumb__list a { color: rgba(27, 31, 36, .74); }
.breadcrumb__list a:hover { color: var(--signal); }
.breadcrumb__list [aria-current="page"] { color: var(--ink); font-weight: 700; }

/* ---------- 长文 ---------- */

.prose {
  max-width: 68ch;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--char);
}

.prose h2 { margin: 1.6em 0 .55em; font-size: clamp(1.4rem, 2.4vw, 2rem); }
.prose h3 { margin: 1.4em 0 .5em; }

.prose ul,
.prose ol { padding-left: 1.2em; margin: 0 0 1.2em; }

.prose li { margin-bottom: .4em; }

.prose a {
  color: var(--ink);
  border-bottom: 1px solid var(--signal);
  transition: color .16s var(--ease), background-color .16s var(--ease);
}

.prose a:hover {
  color: var(--signal);
  background: rgba(255, 107, 53, .1);
}

.prose blockquote {
  margin: 1.6em 0;
  padding: .9em 1.2em;
  background: var(--mist);
  border-left: 3px solid var(--teal);
  color: var(--ink);
}

/* ==========================================================================
   断点
   ========================================================================== */

@media (min-width: 720px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__contacts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 880px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer__top { grid-template-columns: 5fr 7fr; }
}

@media (min-width: 980px) {
  .grid--offset { grid-template-columns: 5fr 7fr; }
  .footer__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

@media (max-width: 1023px) {
  :root { --bar-h: 66px; }

  .header__meters { display: none; }
  .brand__note { display: none; }

  .nav-toggle { display: inline-flex; }

  .header__scrim {
    display: block;
    top: var(--bar-h);
    z-index: 210;
  }

  .site-rail {
    top: var(--bar-h);
    width: min(320px, 86vw);
    transform: translateX(-102%);
    z-index: 220;
    box-shadow: 12px 0 40px -20px rgba(8, 26, 46, .7);
  }

  .site-header[data-open] .site-rail { transform: translateX(0); }
  .site-header[data-open] .header__scrim { opacity: 1; pointer-events: auto; }

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

@media (max-width: 719px) {
  .header__actions .btn--ghost { display: none; }

  .header__actions .btn {
    padding: .58em .82em;
    font-size: .8rem;
  }

  .btn--signal { box-shadow: 2px 2px 0 var(--ink-deep); }
  .btn--signal:hover { box-shadow: 1px 1px 0 var(--ink-deep); }

  .brand__mark { width: 34px; height: 34px; }
  .brand__mark::before { width: 15px; }
  .brand__mark::after { height: 15px; }
}

@media (max-width: 479px) {
  .header__actions { display: none; }
  .brand__line { font-size: .92rem; }
  .nav-toggle__label { display: none; }
  .footer__col--anchor { box-shadow: 4px 4px 0 rgba(217, 240, 236, .18); }
}

/* ==========================================================================
   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;
    scroll-behavior: auto !important;
  }

  .btn:hover { transform: none; }
  .rail__link:hover .rail__arrow { transform: none; }
  .site-rail { transition: none; }
  .header__progress { transition: none; }
}