/* ==========================================================================
   长乐坊 · 共享样式（/assets/site.css）
   坊市档案：米白宣纸底 + 赭石框架 + 砂金索引 + 朱砂/青瓷状态
   ========================================================================== */

/* 1. 变量
   ========================================================================== */
:root {
  --paper: #F7F0E3;
  --sand: #E8D7BA;
  --ochre: #8A4B2A;
  --ochre-deep: #5E331F;
  --gold: #C89A56;
  --rock: #4B4A45;
  --cinnabar: #C43B2E;
  --celadon: #2F7D6D;
  --ink: #201B16;
  --glass: rgba(255, 255, 255, 0.62);

  --line: rgba(93, 66, 42, 0.16);
  --line-strong: rgba(138, 75, 42, 0.40);

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", Georgia, "Times New Roman", serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --wrap: 1240px;
  --gutter: clamp(16px, 3.4vw, 44px);
  --frame: 6px;
  --shadow: 0 14px 34px rgba(70, 44, 25, 0.14);
}

@media (max-width: 720px) {
  :root { --frame: 4px; }
}

/* 2. Reset 与基础排版
   ========================================================================== */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--rock);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button { font: inherit; color: inherit; }

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.24;
  color: var(--ink);
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(34px, 5vw, 64px); line-height: 1.12; }
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 26px); }
h4 { font-size: 19px; }

p { margin: 0 0 1.1em; }

a {
  color: var(--ochre);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  text-decoration-color: rgba(138, 75, 42, 0.38);
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover {
  color: var(--celadon);
  text-decoration-color: rgba(47, 125, 109, 0.6);
}

strong { color: var(--ink); font-weight: 700; }

::selection {
  background: rgba(196, 59, 46, 0.2);
  color: var(--ink);
}

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

/* 3. 通用布局
   ========================================================================== */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(36px, 6vw, 84px);
}

.grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 34px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--sidebar { grid-template-columns: minmax(0, 3fr) minmax(0, 7fr); }

/* 4. 文字组件
   ========================================================================== */
.prose {
  max-width: 44rem;
  font-size: 17px;
  line-height: 1.9;
  color: var(--rock);
}

.prose h2 { margin-top: 2em; font-size: clamp(24px, 2.6vw, 32px); }
.prose h3 { margin-top: 1.7em; font-size: 21px; }
.prose ul,
.prose ol { margin: 0 0 1.2em; padding-left: 1.35em; }
.prose li { margin-bottom: 0.5em; }
.prose li::marker { color: var(--gold); }
.prose p:last-child { margin-bottom: 0; }

.prose blockquote {
  margin: 1.6em 0;
  padding: 14px 20px;
  border-left: 3px solid var(--gold);
  background: rgba(232, 215, 186, 0.5);
  color: var(--ochre-deep);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 2px 6px;
  background: var(--sand);
  color: var(--ochre-deep);
}

.lead {
  max-width: 40rem;
  margin: 0 0 1.2em;
  font-family: var(--font-serif);
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.72;
  color: var(--ochre-deep);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--ochre);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--gold);
}

.index-label {
  display: inline-block;
  margin: 0 0 12px;
  padding: 5px 10px;
  border-left: 3px solid var(--gold);
  background: var(--sand);
  color: var(--ochre-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
}

.rule {
  height: 2px;
  margin: clamp(24px, 4vw, 46px) 0;
  border: 0;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(200, 154, 86, 0.18) 55%, rgba(200, 154, 86, 0) 100%);
}

/* 5. 面板、标签、按钮
   ========================================================================== */
.panel {
  padding: clamp(18px, 3vw, 30px);
  background: var(--glass);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid rgba(138, 75, 42, 0.26);
  background: var(--sand);
  color: var(--ochre-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.tag--new {
  background: rgba(196, 59, 46, 0.12);
  border-color: rgba(196, 59, 46, 0.34);
  color: var(--cinnabar);
}

.tag--ok {
  background: rgba(47, 125, 109, 0.12);
  border-color: rgba(47, 125, 109, 0.32);
  color: var(--celadon);
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.cta--solid {
  background: var(--ochre);
  border-color: var(--ochre-deep);
  color: var(--paper);
  box-shadow: 2px 2px 0 var(--gold);
}

.cta--solid:hover {
  background: var(--ochre-deep);
  color: #FFFFFF;
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--gold);
}

.cta--ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ochre);
}

.cta--ghost:hover {
  background: var(--sand);
  color: var(--ochre-deep);
}

/* 6. 面包屑
   ========================================================================== */
.breadcrumb {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(232, 215, 186, 0.38);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 12px var(--gutter);
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--rock);
}

.breadcrumb__link {
  color: var(--ochre);
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: var(--celadon);
  text-decoration: underline;
}

.breadcrumb__sep { color: var(--gold); }
.breadcrumb__current { color: var(--rock); }

/* 7. 图片容器（供页面阶段放置实物档案图）
   ========================================================================== */
.figure { margin: 0; }

.figure__media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-strong);
  background-color: var(--sand);
  background-image:
    linear-gradient(135deg, rgba(138, 75, 42, 0.20) 0%, rgba(200, 154, 86, 0.34) 55%, rgba(232, 215, 186, 0.92) 100%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.16) 0 2px, rgba(255, 255, 255, 0) 2px 12px);
}

.figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure--wide .figure__media { aspect-ratio: 16 / 9; }
.figure--portrait .figure__media { aspect-ratio: 3 / 4; }
.figure--square .figure__media { aspect-ratio: 1 / 1; }

.figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: rgba(75, 74, 69, 0.82);
}

/* 8. 跳转链接
   ========================================================================== */
.skip-link {
  position: absolute;
  top: -80px;
  left: 10px;
  z-index: 200;
  padding: 12px 18px;
  background: var(--ochre-deep);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 10px;
  color: var(--paper);
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

/* 9. 头部：坊门框架
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--paper);
  border-bottom: 2px solid var(--ochre);
  box-shadow: 0 2px 0 rgba(200, 154, 86, 0.38);
}

.site-header::before,
.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: var(--frame);
  background: linear-gradient(180deg, var(--ochre) 0%, var(--ochre) 56%, var(--gold) 100%);
  pointer-events: none;
  z-index: 2;
}

.site-header::before { left: 0; }
.site-header::after { right: 0; }

.topbar {
  background: var(--ochre-deep);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px var(--gutter);
}

.topbar__status {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  margin: 0;
}

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

.status-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(47, 125, 109, 0.28);
}

.topbar__note {
  margin: 0;
  color: rgba(247, 240, 227, 0.72);
  white-space: nowrap;
}

.masthead { background: var(--paper); }

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(14px, 2.4vw, 32px);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
  color: var(--ink);
  text-decoration: none;
}

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

.brand__seal {
  display: grid;
  place-items: center;
  flex: none;
  width: 46px;
  height: 46px;
  border-radius: 3px;
  background: var(--cinnabar);
  color: var(--paper);
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.24);
  transform: rotate(-2deg);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand__name {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.10em;
  color: var(--ink);
}

.brand__suffix {
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1;
  letter-spacing: 0.24em;
  color: var(--ochre);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ochre-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-toggle:hover { background: var(--sand); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-toggle__label {
  display: inline-block;
  min-width: 2.2em;
  text-align: left;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.2vw, 16px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__item { list-style: none; }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 9px 2px;
  color: var(--rock);
  font-size: 14.5px;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 3px;
  height: 2px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.26s ease;
}

.site-nav__link:hover { color: var(--ochre); }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--cinnabar);
  font-weight: 600;
}

.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0;
  color: var(--gold);
}

.site-nav__link[aria-current="page"] .site-nav__num { color: var(--cinnabar); }

.site-nav__cta { flex: none; }

.scroll-meter {
  height: 3px;
  overflow: hidden;
  background: rgba(138, 75, 42, 0.14);
}

.scroll-meter__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--cinnabar) 100%);
  transition: width 0.15s linear;
}

/* 10. 页脚：装订线与备案带
   ========================================================================== */
.site-footer {
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--ochre-deep);
  color: var(--paper);
}

.footer-band {
  height: 8px;
  background: repeating-linear-gradient(
    90deg,
    var(--gold) 0 44px,
    var(--cinnabar) 44px 60px,
    var(--ochre) 60px 104px
  );
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.35fr);
  gap: clamp(28px, 4vw, 64px);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 64px) var(--gutter) clamp(28px, 4vw, 44px);
}

.footer-lead__brand {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.3vw, 25px);
  font-weight: 700;
  line-height: 1.5;
  color: #FFFFFF;
}

.footer-lead__region {
  display: inline-block;
  margin: 0 0 20px;
  padding: 6px 12px;
  border: 1px solid rgba(200, 154, 86, 0.46);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
}

.footer-lead__contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 240, 227, 0.80);
}

.footer-lead__contact li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.footer-lead__label {
  flex: none;
  min-width: 46px;
  padding-top: 1px;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.footer-lead__value { word-break: break-word; }

.footer-lead__email {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper);
  word-break: break-all;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-nav__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(200, 154, 86, 0.30);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.24em;
}

.footer-nav__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-nav__link {
  color: rgba(247, 240, 227, 0.82);
  font-size: 14.5px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-nav__link:hover {
  color: #FFFFFF;
  border-bottom-color: var(--gold);
}

.footer-base {
  border-top: 1px solid rgba(247, 240, 227, 0.18);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px var(--gutter) 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(247, 240, 227, 0.64);
}

.footer-base__copy { margin: 0; }

.footer-base__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 0 0 0 auto;
  padding: 0;
  list-style: none;
}

.footer-base__link {
  color: inherit;
  text-decoration: none;
}

.footer-base__link:hover { color: var(--gold); }

.footer-base__icp { margin: 0; }

/* 11. 滚动显现协议
   ========================================================================== */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.62s cubic-bezier(0.2, 0.7, 0.3, 1), transform 0.62s cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

/* 12. 响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: var(--frame);
    right: var(--frame);
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding: 10px var(--gutter) 22px;
    background: var(--paper);
    border-bottom: 3px solid var(--ochre);
    box-shadow: 0 18px 30px rgba(70, 44, 25, 0.20);
  }

  .site-nav[data-open] { display: flex; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    gap: 12px;
    padding: 14px 4px;
    border-bottom: 1px dashed var(--line);
    font-size: 16px;
    white-space: normal;
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    padding-left: 12px;
    border-left: 3px solid var(--cinnabar);
    background: rgba(196, 59, 46, 0.06);
  }

  .site-nav__cta {
    justify-content: center;
    margin-top: 18px;
  }
}

@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--sidebar { grid-template-columns: minmax(0, 1fr); }

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

@media (max-width: 720px) {
  body { font-size: 16px; line-height: 1.75; }

  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .topbar { font-size: 11px; }
  .topbar__note { display: none; }

  .masthead__inner { padding: 12px var(--gutter); }

  .brand__seal {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }

  .brand__suffix { letter-spacing: 0.16em; }

  .footer-base__links { margin-left: 0; }
}

@media (max-width: 560px) {
  .footer-nav { grid-template-columns: minmax(0, 1fr); }

  .footer-lead__contact li { flex-direction: column; gap: 2px; }

  .footer-lead__label { min-width: 0; }
}

/* 13. 动效与打印降级
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .cta--solid:hover { transform: none; }
}

@media print {
  .site-header,
  .site-footer,
  .skip-link,
  .scroll-meter,
  .breadcrumb { display: none !important; }

  body {
    background: #FFFFFF;
    color: #000000;
    font-size: 11.5pt;
  }

  a {
    color: #000000;
    text-decoration: underline;
  }

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