/* ==========================================================================
   365网址指南 — /assets/site.css
   框架式索引轴 + 12 列档案网格 + 深海蓝/暖金橙双色节奏
   ========================================================================== */

/* ---------- 1. 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 { margin: 0; }

ul, ol { list-style: none; padding: 0; }

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

button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }

a { color: inherit; }

[hidden] { display: none !important; }

/* ---------- 2. tokens ---------- */
:root {
  --c-deep: #0B2545;
  --c-deep-2: #14375E;
  --c-deep-3: #1F4E79;
  --c-amber: #F2A03D;
  --c-amber-soft: #FFC46B;
  --c-mist: #D9E2E8;
  --c-fog: #EEF3F6;
  --c-paper: #F7F4EE;
  --c-ink: #1A1D21;
  --c-graphite: #5C6B78;
  --c-ok: #2E7D63;
  --c-warn: #B4531F;

  --rail-w: 232px;
  --top-h: 56px;
  --r-s: 12px;
  --r-m: 16px;
  --r-l: 20px;
  --shadow: 0 6px 18px rgba(11, 37, 69, .10);
  --ease: cubic-bezier(.22, .68, .28, 1);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

/* ---------- 3. base typography ---------- */
body {
  background-color: var(--c-fog);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.18;
}

h1 { font-size: clamp(32px, 5vw, 64px); }
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2vw, 26px); font-weight: 700; }

p + p { margin-top: .9em; }

::selection { background: var(--c-amber-soft); color: var(--c-deep); }

:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: 2px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---------- 4. utilities ---------- */
.mono { font-family: var(--font-mono); font-size: 13px; font-weight: 500; letter-spacing: .01em; }

.num { font-family: var(--font-mono); font-weight: 700; color: var(--c-warn); letter-spacing: .02em; }

.annotation {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-warn);
  text-transform: none;
}

.annotation--on-dark { color: var(--c-amber-soft); }

.annotation--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .24em;
  line-height: 1;
}

.texture-grid {
  background-image:
    linear-gradient(rgba(31, 78, 121, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 78, 121, .07) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ---------- 5. skip link ---------- */
.skip-link {
  position: fixed;
  left: 12px;
  top: -80px;
  z-index: 90;
  padding: 12px 20px;
  border-radius: 0 0 var(--r-s) var(--r-s);
  background: var(--c-amber);
  color: var(--c-deep);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: top .18s var(--ease);
}

.skip-link:focus { top: 0; }

/* ---------- 6. header / rail ---------- */
.site-header { position: relative; }

.rail-scrim {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(11, 37, 69, .45);
  opacity: 0;
  pointer-events: none;
  transition: opacity .24s var(--ease);
}

.rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 60;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 22px 18px 22px;
  overflow-y: auto;
  background-color: var(--c-deep);
  background-image:
    linear-gradient(rgba(217, 226, 232, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 226, 232, .06) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--c-paper);
}

.rail::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 78px;
  height: 78px;
  background: linear-gradient(135deg, rgba(242, 160, 61, 0) 49.6%, rgba(242, 160, 61, .22) 50%);
  pointer-events: none;
}

.rail__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 6px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 46px;
  padding: 0 8px;
  border-radius: 14px;
  background: var(--c-amber);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .01em;
}

.brand-mark--sm { min-width: 32px; height: 32px; font-size: 13px; border-radius: 10px; }

.brand-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }

.brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--c-paper);
}

.brand-tag {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-mist);
  opacity: .9;
}

.rail__nav { flex: 0 0 auto; }

.nav-list { display: flex; flex-direction: column; gap: 2px; }

.nav-link {
  display: block;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--r-s);
  color: var(--c-mist);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}

.nav-link:hover {
  background: var(--c-deep-2);
  border-color: rgba(255, 196, 107, .5);
  color: var(--c-paper);
  transform: translateX(2px);
}

.nav-link[aria-current="page"] {
  background: var(--c-deep-2);
  border-color: var(--c-amber);
  color: var(--c-paper);
  box-shadow: inset 3px 0 0 var(--c-amber);
}

.nav-link:focus-visible { outline: 2px solid var(--c-amber-soft); outline-offset: 2px; }

.rail__search { display: flex; flex-direction: column; }

.search-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-amber-soft);
}

.search-field {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(217, 226, 232, .28);
  border-radius: 999px;
  background: var(--c-deep-2);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.search-field:focus-within {
  border-color: var(--c-amber-soft);
  box-shadow: 0 0 0 2px rgba(255, 196, 107, .32);
}

.search-field__icon {
  position: relative;
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  border: 2px solid var(--c-amber-soft);
  border-radius: 50%;
}

.search-field__icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -3px;
  width: 7px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-amber-soft);
  transform: rotate(45deg);
}

.search-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 6px 0;
  color: var(--c-paper);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
}

.search-input::placeholder { color: rgba(217, 226, 232, .62); font-size: 13px; }

.search-hint {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(217, 226, 232, .72);
}

.filter-status {
  min-height: 1.1em;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-amber-soft);
}

.rail__foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.stamp {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  border: 1px dashed rgba(255, 196, 107, .55);
  border-radius: var(--r-s);
  background: rgba(20, 55, 94, .72);
}

.stamp__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--c-amber-soft);
}

.stamp__label {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-mist);
}

/* ---------- 7. topbar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(238, 243, 246, .95);
  border-bottom: 1px solid rgba(11, 37, 69, .12);
}

.site-header.is-scrolled .topbar { box-shadow: 0 4px 14px rgba(11, 37, 69, .08); }

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1280px;
  height: var(--top-h);
  margin: 0 auto;
  padding: 0 24px;
}

.topbar__brand {
  display: none;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: -.01em;
  color: var(--c-deep);
  text-decoration: none;
}

.topbar__meta { display: none; color: var(--c-graphite); }

.topbar__progress {
  display: block;
  width: 0;
  height: 2px;
  background: var(--c-amber);
  transition: width .12s linear;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 9px 16px;
  border: 1px solid var(--c-deep);
  border-radius: 999px;
  background: var(--c-deep);
  color: var(--c-paper);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}

.nav-toggle:hover { background: var(--c-deep-2); border-color: var(--c-amber); }

.nav-toggle__bars { display: flex; flex-direction: column; gap: 3px; }

.nav-toggle__bar {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-amber-soft);
}

.nav-toggle__bar:nth-child(2) { width: 12px; }

.nav-toggle__text { letter-spacing: .04em; }

/* ---------- 8. buttons / pills / tags ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}

.btn--primary { background: var(--c-amber); color: var(--c-deep); box-shadow: var(--shadow); }
.btn--primary:hover { background: var(--c-amber-soft); transform: translateY(-2px); }

.btn--ghost { background: transparent; border-color: var(--c-deep-3); color: var(--c-deep); }
.btn--ghost:hover { border-color: var(--c-amber); background: rgba(242, 160, 61, .12); transform: translateY(-2px); }

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

.btn:focus-visible { outline: 2px solid var(--c-amber-soft); outline-offset: 2px; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--c-mist);
  color: var(--c-deep-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12.5px;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.pill:hover { border-color: var(--c-amber); }
.pill--active,
.pill[aria-pressed="true"] { background: var(--c-deep); border-color: var(--c-deep); color: var(--c-paper); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
}

.tag--ok { color: var(--c-ok); background: rgba(46, 125, 99, .10); }
.tag--warn { color: var(--c-warn); background: rgba(180, 83, 31, .10); }
.tag--info { color: var(--c-deep-3); background: rgba(31, 78, 121, .10); }

/* ---------- 9. footer ---------- */
.site-footer {
  margin-top: 72px;
  border-top: 3px solid var(--c-amber);
  background: var(--c-deep);
  color: var(--c-paper);
}

.footer__inner {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px 34px;
}

.footer__brand { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }

.footer__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -.01em;
}

.footer__tag {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-mist);
}

.footer__version {
  margin-top: 4px;
  color: var(--c-amber-soft);
  font-size: 12px;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.footer-col__title {
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--c-amber-soft);
}

.footer-links { display: flex; flex-direction: column; gap: 6px; }

.footer-link {
  display: inline-block;
  padding: 4px 0;
  color: var(--c-mist);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s var(--ease), transform .2s var(--ease);
}

.footer-link:hover {
  color: var(--c-paper);
  text-decoration: underline;
  text-decoration-color: var(--c-amber);
  text-underline-offset: 4px;
  transform: translateX(2px);
}

.footer-link:focus-visible { outline: 2px solid var(--c-amber-soft); outline-offset: 2px; }

.footer__meta { border-top: 1px solid rgba(217, 226, 232, .18); }

.footer__meta-inner {
  display: grid;
  gap: 6px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 24px 40px;
  font-size: 13px;
  color: var(--c-mist);
}

.footer__legal { font-family: var(--font-mono); color: var(--c-paper); letter-spacing: .04em; }
.footer__contact { font-family: var(--font-mono); font-size: 12.5px; }
.footer__addr { max-width: 62ch; }
.footer__hint { color: rgba(217, 226, 232, .72); }
.footer__copy { font-size: 12px; color: rgba(217, 226, 232, .7); }

/* ---------- 10. layout ---------- */
.page-main { display: block; padding-bottom: 24px; }

.wrap {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 56px 0; }
.section--tight { padding: 32px 0; }
.section--paper { background: var(--c-paper); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.section-title { font-family: var(--font-display); font-weight: 900; }
.section-lede { max-width: 46ch; font-size: 16px; color: var(--c-graphite); }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.grid--cards { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 11. components ---------- */
.card {
  padding: 20px 22px;
  border: 1px solid var(--c-mist);
  border-radius: var(--r-m);
  background: var(--c-paper);
  box-shadow: var(--shadow);
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.card:hover { transform: translateY(-2px); border-color: var(--c-amber-soft); }

.card:focus-within { border-color: var(--c-amber); box-shadow: 0 0 0 2px rgba(255, 196, 107, .38); }

.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.card__title { font-family: var(--font-display); font-weight: 700; font-size: 19px; }

.card__meta { font-family: var(--font-mono); font-size: 12px; color: var(--c-graphite); }

.card__body { font-size: 16px; line-height: 1.75; }

.card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--c-graphite);
}

.crumbs a { color: var(--c-deep-3); text-decoration: none; border-bottom: 1px solid transparent; }
.crumbs a:hover { border-bottom-color: var(--c-amber); }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--c-mist); }

.index-list { display: grid; gap: 12px; }

.index-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--c-mist);
  border-radius: var(--r-s);
  background: var(--c-fog);
  color: inherit;
  text-decoration: none;
  transition: transform .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.index-item:hover {
  transform: translateY(-2px);
  border-color: var(--c-amber-soft);
  background: var(--c-paper);
}

.index-item__no { font-family: var(--font-mono); font-size: 13px; color: var(--c-warn); }
.index-item__title { font-family: var(--font-display); font-weight: 700; font-size: 16px; }
.index-item__meta { font-family: var(--font-mono); font-size: 12px; color: var(--c-graphite); }

.timeline { position: relative; display: grid; padding-left: 28px; }

.timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--c-deep-3);
  opacity: .35;
}

.timeline__item { position: relative; padding-bottom: 26px; }

.timeline__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 7px;
  width: 12px;
  height: 12px;
  border: 3px solid var(--c-amber);
  border-radius: 50%;
  background: var(--c-fog);
}

.timeline__date { font-family: var(--font-mono); font-size: 12.5px; color: var(--c-warn); }
.timeline__title { margin-top: 2px; font-family: var(--font-display); font-weight: 700; font-size: 17px; }
.timeline__body { font-size: 15px; color: var(--c-graphite); }

.media {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(11, 37, 69, .08);
  border-radius: var(--r-m);
  background: var(--c-mist);
}

.media > img,
.media > svg,
.media > .media__img { width: 100%; height: 100%; object-fit: cover; }

.media--16x9 { aspect-ratio: 16 / 9; }
.media--3x2 { aspect-ratio: 3 / 2; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }

.media__placeholder {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(135deg, rgba(31, 78, 121, .12), rgba(242, 160, 61, .16)),
    linear-gradient(rgba(11, 37, 69, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 37, 69, .10) 1px, transparent 1px);
  background-size: 100% 100%, 28px 28px, 28px 28px;
}

.media__caption {
  padding: 10px 2px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-graphite);
}

/* ---------- 12. motion ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .24s var(--ease), transform .24s var(--ease);
}

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

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

/* ---------- 13. responsive ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
  .rail-scrim { display: none; }
  .topbar__meta { display: inline-block; }
}

@media (max-width: 1023px) {
  .rail {
    width: min(86vw, 320px);
    transform: translateX(-100%);
    transition: transform .24s var(--ease);
  }

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

  .topbar__brand { display: inline-flex; }
}

@media (max-width: 900px) {
  .footer__inner { grid-template-columns: 1fr; gap: 32px; padding: 44px 20px 28px; }
  .col-4, .col-6, .col-8 { grid-column: span 12; }
  .topbar__inner { padding: 0 20px; }
  .wrap { padding: 0 20px; }
  .section { padding: 44px 0; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  .footer__meta-inner { padding: 18px 20px 34px; }
  .index-item { grid-template-columns: auto 1fr; }
  .index-item__meta { grid-column: 2; }
}

@media (max-width: 420px) {
  .footer__cols { grid-template-columns: 1fr; }
  .section-head { gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
  .js-reveal [data-reveal] { opacity: 1; transform: none; }
}