/* =========================================================
   顺发娱乐汇 · 共享样式 /assets/site.css
   刊头式页头 + 档案柜式页脚 + 通用内容组件
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

/* ---------- 2. 变量 ---------- */
:root {
  --sf-copper: #B5642A;
  --sf-copper-deep: #8C4A1E;
  --sf-copper-light: #E2A472;
  --sf-ink: #1F3D33;
  --sf-moss: #3E6B57;
  --sf-rice: #F6F1E7;
  --sf-paper: #FDFBF6;
  --sf-vermilion: #C0392B;
  --sf-stone: #6E6A63;
  --sf-line: #E4EBE5;
  --sf-black: #171512;
  --sf-dark-text: #EDE7DA;

  --sf-max: 1180px;
  --sf-gutter: 24px;
  --sf-ease: cubic-bezier(.2, .7, .3, 1);
  --sf-shadow-1: 0 1px 0 rgba(23, 21, 18, .06);
  --sf-shadow-2: 0 8px 24px rgba(23, 21, 18, .05);

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

/* ---------- 3. 基础中文排版 ---------- */
body {
  background: var(--sf-rice);
  color: var(--sf-black);
  font-family: var(--sf-font-sans);
  font-size: 16.5px;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--sf-font-display);
  font-weight: 800;
  color: var(--sf-ink);
  line-height: 1.22;
  letter-spacing: .01em;
}
h1 { font-size: clamp(34px, 5.2vw, 64px); line-height: 1.08; letter-spacing: -.005em; }
h2 { font-size: clamp(26px, 3.2vw, 40px); }
h3 { font-size: clamp(20px, 2.1vw, 28px); }
h4 { font-family: var(--sf-font-sans); font-weight: 700; font-size: 20px; line-height: 1.4; }

p { max-width: 40em; }

::selection { background: rgba(181, 100, 42, .22); color: var(--sf-ink); }

:focus-visible {
  outline: 2px solid var(--sf-copper);
  outline-offset: 3px;
  border-radius: 2px;
}

#main-content { display: block; scroll-margin-top: 16px; }

/* ---------- 4. 布局容器与栅格 ---------- */
.sf-container {
  width: 100%;
  max-width: var(--sf-max);
  margin-inline: auto;
  padding-inline: var(--sf-gutter);
}

.sf-section { padding-block: clamp(40px, 6vw, 76px); }

.sf-section__head {
  display: grid;
  gap: 12px;
  max-width: 62ch;
  margin-bottom: clamp(24px, 3vw, 36px);
}

.sf-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--sf-copper);
  line-height: 1.4;
}
.sf-eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--sf-copper);
  flex: none;
}

.sf-section__title { font-size: clamp(26px, 3.4vw, 42px); }

.sf-section__lede {
  color: var(--sf-stone);
  font-size: 16px;
  line-height: 1.85;
  max-width: 46ch;
}

.sf-prose {
  max-width: 40em;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--sf-black);
}
.sf-prose > * + * { margin-top: 1.1em; }
.sf-prose h3, .sf-prose h4 { margin-top: 1.7em; }
.sf-prose strong { color: var(--sf-ink); font-weight: 700; }
.sf-prose ul { list-style: none; padding-left: 0; }
.sf-prose li { position: relative; padding-left: 18px; }
.sf-prose li + li { margin-top: .5em; }
.sf-prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .92em;
  width: 7px;
  height: 1px;
  background: var(--sf-copper);
}

.sf-grid { display: grid; gap: var(--sf-gutter); }
.sf-grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.sf-grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.sf-grid--9-3 { grid-template-columns: minmax(0, 9fr) minmax(0, 3fr); }

.sf-hairline {
  border: 0;
  border-top: 1px solid var(--sf-line);
  margin: 0;
  height: 0;
}

.sf-coord {
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--sf-stone);
  line-height: 1.6;
}

/* ---------- 5. 按钮与链接 ---------- */
.sf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid var(--sf-ink);
  border-radius: 2px;
  background: transparent;
  color: var(--sf-ink);
  font-family: var(--sf-font-sans);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color .16s var(--sf-ease),
    color .16s var(--sf-ease),
    border-color .16s var(--sf-ease),
    transform .16s var(--sf-ease);
}
.sf-btn:hover { background: var(--sf-ink); border-color: var(--sf-ink); color: var(--sf-paper); }
.sf-btn:active { transform: translateY(1px); }

.sf-btn--solid { background: var(--sf-copper); border-color: var(--sf-copper); color: var(--sf-paper); }
.sf-btn--solid:hover { background: var(--sf-copper-deep); border-color: var(--sf-copper-deep); color: var(--sf-paper); }

.sf-btn--ghost {
  padding: 10px 14px;
  font-size: 13px;
  border-color: rgba(31, 61, 51, .3);
  color: var(--sf-ink);
  background: transparent;
}
.sf-btn--ghost:hover { background: var(--sf-ink); border-color: var(--sf-ink); color: var(--sf-paper); }

.sf-btn--quiet {
  background: var(--sf-paper);
  border-color: var(--sf-line);
  color: var(--sf-ink);
}
.sf-btn--quiet:hover { background: var(--sf-paper); border-color: var(--sf-copper); color: var(--sf-copper); }

.sf-link {
  color: var(--sf-copper-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(181, 100, 42, .35);
  transition: color .16s var(--sf-ease), border-color .16s var(--sf-ease);
}
.sf-link:hover { color: var(--sf-copper); border-bottom-color: var(--sf-copper); }

/* ---------- 6. 面包屑 ---------- */
.sf-breadcrumb {
  border-bottom: 1px solid var(--sf-line);
  background: var(--sf-rice);
}
.sf-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 13px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sf-stone);
}
.sf-breadcrumb__item { display: flex; align-items: center; gap: 8px; }
.sf-breadcrumb__link {
  color: var(--sf-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--sf-ease), border-color .16s var(--sf-ease);
}
.sf-breadcrumb__link:hover { color: var(--sf-copper); border-bottom-color: var(--sf-copper); }
.sf-breadcrumb__sep { color: rgba(110, 106, 99, .5); }
.sf-breadcrumb__current { color: var(--sf-stone); }

/* ---------- 7. 分类索引条目 ---------- */
.sf-index-band {
  background: var(--sf-paper);
  border-block: 1px solid var(--sf-line);
}
.sf-index-item {
  display: block;
  padding: 15px 18px 17px;
  border-right: 1px solid var(--sf-line);
  color: var(--sf-ink);
  text-decoration: none;
  transition:
    background-color .16s var(--sf-ease),
    box-shadow .16s var(--sf-ease),
    transform .16s var(--sf-ease);
}
.sf-index-item:hover {
  background: var(--sf-rice);
  box-shadow: inset 0 -2px 0 var(--sf-copper);
  transform: translateY(-2px);
}
.sf-index-item__code {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--sf-copper);
  line-height: 1.4;
}
.sf-index-item__label {
  display: block;
  margin-top: 3px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}
.sf-index-item__desc {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--sf-stone);
}

/* ---------- 8. 批次卡 ---------- */
.sf-batch-card {
  display: block;
  padding: 20px;
  background: var(--sf-paper);
  border: 1px solid var(--sf-line);
  border-radius: 4px;
  box-shadow: var(--sf-shadow-1);
  color: inherit;
  text-decoration: none;
  transition: box-shadow .16s var(--sf-ease), transform .16s var(--sf-ease), border-color .16s var(--sf-ease);
}
.sf-batch-card:hover {
  box-shadow: var(--sf-shadow-2);
  border-color: rgba(62, 107, 87, .4);
  transform: translateY(-2px);
}
.sf-batch-card__code {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--sf-stone);
  line-height: 1.4;
}
.sf-batch-card__status {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  line-height: 1.6;
  border-radius: 2px;
  background: rgba(192, 57, 43, .12);
  color: var(--sf-vermilion);
  transition: background-color .16s var(--sf-ease);
}
.sf-batch-card:hover .sf-batch-card__status { background: rgba(192, 57, 43, .2); }

/* ---------- 9. 记录行 ---------- */
.sf-record-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(104px, 140px) minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 11px 12px 11px 14px;
  border-bottom: 1px solid var(--sf-line);
  font-size: 15px;
  line-height: 1.7;
  transition: background-color .16s var(--sf-ease);
}
.sf-record-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--sf-ink);
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform .16s var(--sf-ease);
}
.sf-record-row:hover { background: var(--sf-paper); }
.sf-record-row:hover::before { transform: scaleY(1); }
.sf-record-row__field {
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--sf-stone);
}
.sf-record-row__value { color: var(--sf-black); }

/* ---------- 10. 注释条与标签 ---------- */
.sf-note-bar {
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--sf-copper);
  color: var(--sf-stone);
  font-size: 14.5px;
  line-height: 1.8;
}

.sf-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--sf-line);
  border-radius: 2px;
  background: var(--sf-paper);
  color: var(--sf-ink);
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.6;
}
.sf-tag--moss { border-color: rgba(62, 107, 87, .4); color: var(--sf-moss); }
.sf-tag--vermilion {
  border-color: rgba(192, 57, 43, .35);
  background: rgba(192, 57, 43, .06);
  color: var(--sf-vermilion);
}

/* ---------- 11. 图片容器（页面阶段复用） ---------- */
.sf-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(31, 61, 51, .2);
  border-radius: 4px;
  background: var(--sf-line);
}
.sf-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(181, 100, 42, .18), rgba(181, 100, 42, .06));
  pointer-events: none;
}
.sf-media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92);
}
.sf-media--wide { aspect-ratio: 21 / 9; }
.sf-media--tall { aspect-ratio: 4 / 5; }
.sf-media--square { aspect-ratio: 1 / 1; }
.sf-media__caption {
  margin-top: 10px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--sf-stone);
  line-height: 1.6;
}

/* ---------- 12. 跳转链接与阅读进度 ---------- */
.sf-skip {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 99;
  padding: 10px 18px;
  border-radius: 2px;
  background: var(--sf-ink);
  color: var(--sf-paper);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: top .16s var(--sf-ease);
}
.sf-skip:focus { top: 12px; }

.sf-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 90;
  background: rgba(31, 61, 51, .08);
  pointer-events: none;
}
.sf-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--sf-copper);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 13. 页头（刊头） ---------- */
.sf-header {
  position: relative;
  z-index: 60;
  background: var(--sf-rice);
  border-bottom: 1px solid var(--sf-line);
}

.sf-header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: var(--sf-max);
  margin-inline: auto;
  padding: 20px var(--sf-gutter) 16px;
}

.sf-header__meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.sf-meta-label {
  font-family: var(--sf-font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--sf-stone);
  line-height: 1.5;
}
.sf-meta-value {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--sf-ink);
  line-height: 1.6;
}
.sf-meta-value::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--sf-copper);
}

.sf-masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  text-align: center;
}
.sf-masthead__brand {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(28px, 3.1vw, 38px);
  line-height: 1.05;
  letter-spacing: .08em;
  color: var(--sf-ink);
  text-decoration: none;
  transition: color .16s var(--sf-ease);
}
.sf-masthead__brand:hover { color: var(--sf-copper); }
.sf-masthead__sig {
  margin: 0;
  font-family: var(--sf-font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--sf-stone);
  line-height: 1.5;
}

.sf-header__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.sf-batch-badge {
  padding: 6px 9px;
  border: 1px solid rgba(181, 100, 42, .45);
  border-radius: 2px;
  background: rgba(181, 100, 42, .08);
  color: var(--sf-copper-deep);
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.4;
  white-space: nowrap;
}

.sf-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid rgba(31, 61, 51, .25);
  border-radius: 2px;
  background: var(--sf-paper);
  color: var(--sf-ink);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
  transition: color .16s var(--sf-ease), border-color .16s var(--sf-ease);
}
.sf-nav-toggle:hover { color: var(--sf-copper); border-color: var(--sf-copper); }
.sf-nav-toggle__text { font-size: 13px; }
.sf-nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color .16s var(--sf-ease);
}
.sf-nav-toggle__bars::before,
.sf-nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .16s var(--sf-ease);
}
.sf-nav-toggle__bars::before { top: -6px; }
.sf-nav-toggle__bars::after { top: 6px; }
.sf-nav-toggle[aria-expanded="true"] .sf-nav-toggle__bars { background: transparent; }
.sf-nav-toggle[aria-expanded="true"] .sf-nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.sf-nav-toggle[aria-expanded="true"] .sf-nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.sf-nav {
  border-top: 1px solid var(--sf-line);
  background: var(--sf-rice);
}
.sf-nav__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: var(--sf-max);
  margin-inline: auto;
  padding-inline: var(--sf-gutter);
}
.sf-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 4px;
}
.sf-nav__item { display: flex; }
.sf-nav__link {
  position: relative;
  display: inline-block;
  padding: 13px 18px;
  border-bottom: 2px solid transparent;
  color: var(--sf-ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  text-decoration: none;
  transition: color .16s var(--sf-ease), border-color .16s var(--sf-ease);
}
.sf-nav__link:hover { color: var(--sf-copper); border-bottom-color: var(--sf-copper); }
.sf-nav__link[aria-current="page"] {
  color: var(--sf-copper);
  border-bottom-color: var(--sf-copper);
}
.sf-nav__note {
  position: absolute;
  right: var(--sf-gutter);
  top: 50%;
  transform: translateY(-50%);
  margin: 0;
  font-family: var(--sf-font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--sf-stone);
  line-height: 1.6;
}

/* ---------- 14. 页脚（档案柜） ---------- */
.sf-footer {
  background: var(--sf-ink);
  border-top: 3px solid var(--sf-copper);
  color: var(--sf-dark-text);
  font-size: 14px;
  line-height: 1.75;
}
.sf-footer__inner {
  width: 100%;
  max-width: var(--sf-max);
  margin-inline: auto;
  padding: clamp(36px, 5vw, 56px) var(--sf-gutter) 24px;
}

.sf-footer__brandline {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  margin-bottom: 26px;
}
.sf-footer__brand {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: .1em;
  color: var(--sf-paper);
  text-decoration: none;
  line-height: 1.3;
  transition: color .16s var(--sf-ease);
}
.sf-footer__brand:hover { color: var(--sf-copper-light); }
.sf-footer__brandnote {
  font-family: var(--sf-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(246, 241, 231, .55);
  line-height: 1.6;
}

.sf-footer__index { padding-bottom: 30px; border-bottom: 1px solid rgba(246, 241, 231, .14); }

.sf-footer__title {
  margin-bottom: 14px;
  font-family: var(--sf-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--sf-copper-light);
  line-height: 1.6;
}

.sf-index-links {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 1px;
  background: rgba(246, 241, 231, .14);
  border: 1px solid rgba(246, 241, 231, .14);
}
.sf-index-link {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 13px 12px;
  background: var(--sf-ink);
  color: var(--sf-dark-text);
  text-decoration: none;
  transition: background-color .16s var(--sf-ease), color .16s var(--sf-ease);
}
.sf-index-link:hover { background: #264A3E; color: #FFFFFF; }
.sf-index-code {
  font-family: var(--sf-font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--sf-copper-light);
  line-height: 1.5;
}
.sf-index-label { font-size: 13px; font-weight: 700; line-height: 1.5; }

.sf-footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.6fr;
  gap: 32px;
  padding: 32px 0 30px;
  border-bottom: 1px solid rgba(246, 241, 231, .14);
}
.sf-footer__col { min-width: 0; }

.sf-footer__nav,
.sf-footer__legal { display: grid; gap: 8px; }
.sf-footer__nav a,
.sf-footer__legal a {
  color: var(--sf-dark-text);
  font-size: 14px;
  text-decoration: none;
  line-height: 1.7;
  transition: color .16s var(--sf-ease), box-shadow .16s var(--sf-ease);
}
.sf-footer__nav a:hover,
.sf-footer__legal a:hover {
  color: var(--sf-copper-light);
  box-shadow: inset 0 -1px 0 var(--sf-copper-light);
}

.sf-footer__contact {
  display: grid;
  gap: 8px;
  font-style: normal;
}
.sf-footer__contact-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  max-width: none;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sf-dark-text);
  overflow-wrap: anywhere;
}
.sf-footer__contact-key {
  font-family: var(--sf-font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--sf-copper-light);
  padding-top: 3px;
  line-height: 1.7;
}
.sf-footer__note {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid rgba(181, 100, 42, .55);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(246, 241, 231, .62);
  max-width: 34em;
}

.sf-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding-top: 20px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(246, 241, 231, .58);
}
.sf-footer__icp,
.sf-footer__domain,
.sf-footer__copy { margin: 0; max-width: none; line-height: 1.7; }
.sf-footer__copy { margin-left: auto; }

.sf-footer :focus-visible { outline-color: var(--sf-copper-light); }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1180px) {
  .sf-nav__note { display: none; }
}

@media (max-width: 1024px) {
  .sf-header__meta { display: none; }
  .sf-header__inner { padding-block: 16px 14px; }
  .sf-grid--7-5,
  .sf-grid--8-4,
  .sf-grid--9-3 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .sf-index-links { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .sf-footer__grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .sf-footer__col--contact { grid-column: 1 / -1; }
}

@media (max-width: 880px) {
  .sf-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "masthead actions"
      "meta meta";
    align-items: center;
    gap: 10px 12px;
    padding: 14px 18px 12px;
  }

  .sf-masthead {
    grid-area: masthead;
    align-items: flex-start;
    text-align: left;
  }
  .sf-masthead__brand { font-size: 26px; letter-spacing: .05em; }
  .sf-masthead__sig { font-size: 10px; letter-spacing: .14em; }

  .sf-header__actions { grid-area: actions; }

  .sf-header__meta {
    grid-area: meta;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding-top: 10px;
    border-top: 1px solid var(--sf-line);
  }
  .sf-meta-label { font-size: 10px; letter-spacing: .16em; }
  .sf-meta-value { font-size: 12px; }

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

  .sf-nav {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    border-top: 0;
    background: var(--sf-paper);
    transition: max-height .24s var(--sf-ease), visibility .24s var(--sf-ease);
  }
  .sf-nav[data-open] {
    max-height: 76vh;
    overflow-y: auto;
    visibility: visible;
    border-top: 1px solid var(--sf-line);
    box-shadow: var(--sf-shadow-2);
  }
  .sf-nav__inner {
    flex-direction: column;
    align-items: stretch;
    padding: 6px 18px 18px;
  }
  .sf-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .sf-nav__item { border-bottom: 1px solid var(--sf-line); }
  .sf-nav__link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 0;
  }
  .sf-nav__link:hover { border-bottom: 0; }
  .sf-nav__link[aria-current="page"] {
    padding-left: 12px;
    border-bottom: 0;
    background: rgba(181, 100, 42, .06);
    box-shadow: inset 3px 0 0 var(--sf-copper);
  }
  .sf-nav__note {
    position: static;
    transform: none;
    display: block;
    margin-top: 14px;
    padding-left: 4px;
    line-height: 1.6;
  }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .sf-container { padding-inline: 18px; }
  .sf-header__inner { padding-inline: 18px; }
  .sf-nav__inner { padding-inline: 18px; }
  .sf-record-row { grid-template-columns: minmax(0, 1fr) auto; gap: 6px 12px; }
  .sf-record-row__field { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .sf-header__actions > .sf-btn--ghost { display: none; }
  .sf-index-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sf-footer__grid { grid-template-columns: 1fr; }
  .sf-footer__contact-item { grid-template-columns: 1fr; gap: 2px; }
  .sf-footer__contact-key { padding-top: 0; }
  .sf-footer__copy { margin-left: 0; }
  .sf-footer__base { gap: 6px 16px; }
}

/* ---------- 16. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }
  .sf-index-item:hover,
  .sf-batch-card:hover,
  .sf-btn:active { transform: none; }
  .sf-record-row::before { transition: none; }
}

@media print {
  .sf-header, .sf-footer, .sf-progress, .sf-skip { display: none !important; }
  body { background: #FFFFFF; color: #000000; }
}