/* =========================================================
   28杠主站 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 侧边轨道页头 / 页脚 / 基础组件
   ========================================================= */

/* ---------- 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, figure, blockquote, dl, dd, ol, ul {
  margin: 0;
}

ol, ul { padding: 0; }

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button { background: none; border: 0; }

table { border-collapse: collapse; }

/* ---------- tokens ---------- */
:root {
  --ochre-500: #B4531E;
  --ochre-100: #F1DCCF;
  --lake-900: #10394A;
  --lake-600: #2E7C93;
  --fern-700: #2F6F63;
  --clay-700: #9E3B2E;
  --salt-50: #FAF8F4;
  --paper: #FFFFFF;
  --steel-500: #6B747C;
  --ink-900: #10161A;
  --glass: rgba(255, 255, 255, 0.62);
  --line: rgba(16, 57, 74, 0.14);
  --line-soft: rgba(16, 57, 74, 0.08);
  --rail-w: 240px;
  --gutter: clamp(18px, 4vw, 56px);
  --radius: 12px;
  --ease: ease-out;

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

  --step-1: 24px;
  --step-2: 48px;
  --step-3: 96px;
}

/* ---------- base ---------- */
html { background-color: var(--salt-50); }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-900);
  background-color: var(--salt-50);
  background-image:
    radial-gradient(120% 80% at 6% -12%, rgba(46, 124, 147, 0.20), rgba(46, 124, 147, 0) 62%),
    radial-gradient(90% 60% at 96% -4%, rgba(180, 83, 30, 0.16), rgba(180, 83, 30, 0) 60%),
    linear-gradient(180deg, rgba(241, 220, 207, 0) 0%, rgba(241, 220, 207, 0) 60%, rgba(241, 220, 207, 0.30) 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  min-height: 100vh;
}

#main-content { scroll-margin-top: 84px; }

p { max-width: 68ch; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--lake-900);
}

h1 { font-size: clamp(1.9rem, 4.4vw, 3.2rem); }
h2 { font-size: clamp(1.4rem, 2.4vw, 2rem); }
h3 { font-size: clamp(1.0625rem, 1.5vw, 1.25rem); font-weight: 700; }

a { color: var(--lake-600); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ochre-500); }

strong { font-weight: 700; }

:focus-visible {
  outline: 2px solid var(--ochre-500);
  outline-offset: 3px;
  border-radius: 3px;
}

.is-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  font-weight: 500;
}

.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;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--lake-900);
  color: var(--salt-50);
  font-size: 14px;
  border-radius: 8px;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.16s var(--ease);
}
.skip-link:focus {
  transform: translateY(0);
  color: var(--salt-50);
}

/* =========================================================
   页头 · 侧边轨道 / 移动顶栏 + 抽屉
   ========================================================= */
.site-rail {
  position: sticky;
  top: 0;
  z-index: 100;
  display: block;
  width: 100%;
  padding: 0;
  background: rgba(250, 248, 244, 0.96);
  border-bottom: 1px solid var(--line);
}

/* 顶栏 */
.rail-top {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px var(--gutter, 16px);
  padding-left: 16px;
  padding-right: 16px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--ink-900);
  min-width: 0;
}
.brand:hover { color: var(--ink-900); }

.brand-mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--lake-900) 0%, var(--lake-600) 56%, var(--ochre-500) 100%);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-text { display: block; min-width: 0; }

.brand-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.brand-sub {
  display: block;
  margin-top: 2px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--steel-500);
}

/* 移动目录按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lake-900);
  cursor: pointer;
  transition: background-color 0.12s var(--ease), border-color 0.12s var(--ease), transform 0.12s var(--ease);
}
.nav-toggle:hover {
  background: var(--ochre-100);
  border-color: var(--ochre-500);
  transform: translateX(2px);
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 15px;
}
.nav-toggle-bar {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.18s var(--ease), width 0.18s var(--ease);
}
.nav-toggle-bar:first-child { width: 15px; }
.nav-toggle-bar:last-child { width: 10px; }

.site-rail[data-open] .nav-toggle-bar:first-child {
  transform: translateY(2.75px) rotate(45deg);
  width: 15px;
}
.site-rail[data-open] .nav-toggle-bar:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
  width: 15px;
}
.site-rail[data-open] .nav-toggle {
  background: var(--ochre-100);
  border-color: var(--ochre-500);
}

/* 导航（移动端 = 全屏抽屉） */
.site-nav {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  padding: 92px 20px 40px;
  background: rgba(250, 248, 244, 0.98);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease), visibility 0.18s var(--ease);
}
.site-rail[data-open] .site-nav {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-legend {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--steel-500);
  text-transform: uppercase;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: navidx;
}
.nav-list > li { counter-increment: navidx; }

.nav-list a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 14px 13px 8px;
  border-left: 2px solid transparent;
  border-radius: 0 8px 8px 0;
  color: var(--lake-900);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.12s var(--ease), border-color 0.12s var(--ease),
    color 0.12s var(--ease), transform 0.12s var(--ease);
}
.nav-list a::before {
  content: counter(navidx, decimal-leading-zero);
  flex: none;
  width: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--steel-500);
  letter-spacing: 0.04em;
}
.nav-list a:hover {
  background: rgba(255, 255, 255, 0.85);
  border-left-color: var(--ochre-500);
  transform: translateX(2px);
}
.nav-list a[aria-current="page"] {
  background: var(--paper);
  border-left-color: var(--ochre-500);
  color: var(--ochre-500);
  font-weight: 700;
  box-shadow: 0 1px 0 var(--line-soft);
}
.nav-list a[aria-current="page"]::before { color: var(--ochre-500); }

/* 快捷入口芯片 */
.rail-utility {
  display: none;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  flex-wrap: wrap;
  gap: 6px;
}
.rail-utility a {
  display: inline-block;
  padding: 5px 11px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--lake-900);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  transition: background-color 0.12s var(--ease), border-color 0.12s var(--ease),
    color 0.12s var(--ease), transform 0.12s var(--ease);
}
.rail-utility a:hover {
  background: var(--ochre-100);
  border-color: var(--ochre-500);
  color: var(--ochre-500);
  transform: translateX(2px);
}

/* 轨道底部联系条 */
.rail-foot { display: none; }

.rail-meta {
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel-500);
  max-width: none;
}

.rail-phone {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--lake-900);
  letter-spacing: 0.02em;
}

/* 滚动进度尺：移动端为顶栏下沿横线 */
.rail-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(90deg, var(--lake-600), var(--ochre-500));
  transform: scaleX(var(--p, 0));
  transform-origin: left center;
}

/* ---------- 桌面端：常驻左侧玻璃轨道 ---------- */
@media (min-width: 1080px) {
  body { padding-left: var(--rail-w); }

  .site-rail {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    padding: 28px 20px 22px;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    background: var(--glass);
    -webkit-backdrop-filter: blur(12px) saturate(1.1);
    backdrop-filter: blur(12px) saturate(1.1);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .site-rail::after {
    content: "";
    position: absolute;
    top: 0; right: 0; bottom: 0;
    width: 7px;
    pointer-events: none;
    background: repeating-linear-gradient(
      to bottom,
      rgba(16, 57, 74, 0.16) 0 1px,
      rgba(16, 57, 74, 0) 1px 13px
    );
  }

  .rail-top {
    padding: 0;
    justify-content: flex-start;
  }
  .nav-toggle { display: none; }

  .site-nav {
    position: static;
    inset: auto;
    z-index: auto;
    display: block;
    padding: 30px 0 0;
    background: transparent;
    overflow: visible;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .rail-utility { display: flex; }
  .rail-foot {
    display: block;
    margin-top: auto;
    padding-top: 18px;
    border-top: 1px solid var(--line);
  }

  .rail-progress {
    left: auto;
    right: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    height: auto;
    background: linear-gradient(180deg, var(--lake-600), var(--ochre-500));
    transform: scaleY(var(--p, 0));
    transform-origin: center top;
  }

  #main-content { scroll-margin-top: 24px; }
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  margin-top: var(--step-3);
  padding: 56px var(--gutter) 26px;
  background: var(--lake-900);
  color: rgba(250, 248, 244, 0.76);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--ochre-500) 0%,
    var(--lake-600) 40%,
    var(--fern-700) 74%,
    var(--ochre-100) 100%);
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.footer-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(140deg, var(--lake-600) 0%, var(--ochre-500) 100%);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
}

.footer-tagline {
  margin: 14px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: #fff;
  max-width: none;
}

.footer-note {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(250, 248, 244, 0.58);
  max-width: 30ch;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 28px;
}

.footer-col-title {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  font-weight: 600;
  color: rgba(250, 248, 244, 0.5);
  max-width: none;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.footer-col a {
  display: inline-block;
  font-size: 14px;
  color: rgba(250, 248, 244, 0.86);
  text-decoration: none;
  transition: color 0.12s var(--ease), transform 0.12s var(--ease);
}
.footer-col a:hover {
  color: var(--ochre-100);
  transform: translateX(2px);
}

.footer-contact { font-size: 13.5px; line-height: 1.7; }
.footer-contact dl { display: grid; gap: 10px; }
.footer-contact dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(250, 248, 244, 0.48);
}
.footer-contact dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: rgba(250, 248, 244, 0.9);
  overflow-wrap: anywhere;
}
.footer-contact dd .is-mono { font-size: 13.5px; }

.footer-contact-note {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.75;
  color: rgba(250, 248, 244, 0.52);
  max-width: 46ch;
}

.copy-btn {
  flex: none;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(250, 248, 244, 0.86);
  border: 1px solid rgba(250, 248, 244, 0.28);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 0.12s var(--ease), border-color 0.12s var(--ease),
    color 0.12s var(--ease);
}
.copy-btn:hover {
  background: rgba(180, 83, 30, 0.35);
  border-color: var(--ochre-500);
  color: #fff;
}
.copy-btn[data-copied] {
  background: var(--fern-700);
  border-color: var(--fern-700);
  color: #fff;
}

.footer-base {
  max-width: 1180px;
  margin: 42px auto 0;
  padding-top: 18px;
  border-top: 1px solid rgba(250, 248, 244, 0.16);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 12px;
  color: rgba(250, 248, 244, 0.55);
}
.footer-legal,
.footer-icp { max-width: none; }
.footer-icp { font-family: var(--font-mono); letter-spacing: 0.02em; }

@media (min-width: 760px) {
  .footer-inner { grid-template-columns: 1.05fr 1.6fr; }
}
@media (min-width: 1080px) {
  .footer-inner { grid-template-columns: 1.15fr 1.6fr 1.15fr; gap: 48px; }
}

/* =========================================================
   基础组件
   ========================================================= */
.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

/* 栏目信息带 */
.page-head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 6px 24px;
  padding-bottom: 18px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
}
.page-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 64px;
  height: 2px;
  background: var(--ochre-500);
}
.page-head h1 { margin: 0; }

.eyebrow {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--steel-500);
  margin: 0 0 8px;
  max-width: none;
}

.lede {
  font-size: clamp(1.0625rem, 1.5vw, 1.1875rem);
  line-height: 1.8;
  color: var(--lake-900);
  max-width: 58ch;
}

/* 偏轴网格 */
.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.layout__aside { display: grid; gap: 20px; align-content: start; }

@media (min-width: 1080px) {
  .layout {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
    gap: 48px;
    padding-left: clamp(0px, 3vw, 56px);
  }
}

.grid-2,
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 760px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1080px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.stack { display: grid; gap: 24px; align-content: start; }

.section { margin-top: var(--step-3); }
.section:first-child { margin-top: 0; }

.section-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.section-title h2,
.section-title h3 { margin: 0; }

/* 按钮 */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.12s var(--ease), color 0.12s var(--ease),
    border-color 0.12s var(--ease), transform 0.12s var(--ease);
}
.btn:hover { transform: translateX(2px); }

.btn--primary {
  background: var(--ochre-500);
  color: #fff;
}
.btn--primary:hover { background: #9C4618; color: #fff; }

.btn--ghost {
  background: transparent;
  color: var(--lake-900);
  border-color: var(--line);
}
.btn--ghost:hover {
  background: var(--paper);
  border-color: var(--ochre-500);
  color: var(--ochre-500);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  font-size: 12.5px;
  color: var(--steel-500);
}
.breadcrumb li { list-style: none; }
.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(16, 57, 74, 0.3);
}
.breadcrumb a { color: var(--steel-500); text-decoration: none; }
.breadcrumb a:hover { color: var(--ochre-500); }

/* 玻璃旁注卡 */
.glass-card,
.note-aside {
  padding: 18px 20px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 var(--line-soft);
  font-size: 14px;
}
.glass-card h3,
.note-aside h3 {
  margin: 0 0 10px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--lake-900);
}
.glass-card p,
.note-aside p { font-size: 13.5px; line-height: 1.75; color: var(--steel-500); }
.glass-card p:last-child,
.note-aside p:last-child { margin-bottom: 0; }

/* 数字锚点条 */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat {
  background: var(--paper);
  padding: 16px 18px;
}
.stat-value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--lake-900);
}
.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--steel-500);
}

/* 索引模块 */
.index-module {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.index-module > li { list-style: none; }

.index-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 18px;
  padding: 14px 16px 14px 18px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-900);
  text-decoration: none;
  transition: background-color 0.12s var(--ease), padding-left 0.12s var(--ease);
}
.index-row::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: transparent;
  transition: background-color 0.12s var(--ease);
}
.index-row:hover {
  background: var(--paper);
  padding-left: 24px;
  color: var(--ink-900);
}
.index-row:hover::before { background: var(--ochre-500); }

.index-code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--lake-900);
}
.index-meta {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--steel-500);
  text-align: right;
  white-space: nowrap;
}
@media (max-width: 520px) {
  .index-row { grid-template-columns: minmax(0, 1fr); }
  .index-meta { text-align: left; white-space: normal; }
}

/* 表格 */
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}
.data-table {
  width: 100%;
  background: var(--paper);
  font-size: 14.5px;
}
.data-table caption {
  padding: 12px 14px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel-500);
}
.data-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 11px 14px;
  text-align: left;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--lake-900);
  background: #F4F1EA;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
.data-table tbody tr {
  transition: background-color 0.12s var(--ease);
}
.data-table tbody tr:hover { background: var(--ochre-100); }
.data-table tbody tr:hover td:first-child { box-shadow: inset 3px 0 0 var(--ochre-500); }
.data-table tbody tr:last-child td { border-bottom: 0; }

/* 档位与状态标签 */
.tier,
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
  white-space: nowrap;
}
.tier--a { background: rgba(47, 111, 99, 0.12); color: var(--fern-700); border-color: rgba(47, 111, 99, 0.3); }
.tier--b { background: rgba(46, 124, 147, 0.13); color: var(--lake-600); border-color: rgba(46, 124, 147, 0.32); }
.tier--c { background: var(--ochre-100); color: var(--ochre-500); border-color: rgba(180, 83, 30, 0.35); }
.tier--d { background: rgba(107, 116, 124, 0.13); color: var(--steel-500); border-color: rgba(107, 116, 124, 0.32); }

.status--stock { background: rgba(47, 111, 99, 0.12); color: var(--fern-700); border-color: rgba(47, 111, 99, 0.3); }
.status--plan { background: rgba(46, 124, 147, 0.13); color: var(--lake-600); border-color: rgba(46, 124, 147, 0.32); }
.status--long { background: rgba(158, 59, 46, 0.12); color: var(--clay-700); border-color: rgba(158, 59, 46, 0.32); }

/* 图片容器 */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background-color: #EFEBE3;
  background-image: linear-gradient(140deg,
    rgba(46, 124, 147, 0.16) 0%,
    rgba(250, 248, 244, 0.5) 48%,
    rgba(180, 83, 30, 0.14) 100%);
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--4x3 { aspect-ratio: 4 / 3; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.media-caption {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--steel-500);
}

/* 纵向标尺装饰 */
.scale-line {
  position: relative;
  align-self: stretch;
  min-height: 120px;
  width: 7px;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(16, 57, 74, 0.22) 0 1px,
    rgba(16, 57, 74, 0) 1px 13px
  );
  border-top: 2px solid var(--ochre-500);
}

/* ---------- 反应式 / 无障碍 ---------- */
@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;
    scroll-behavior: auto !important;
  }
}