/* ============================================================
   鼎盛平台入口 · 共享样式表 /assets/site.css
   墨绿 × 暖铜金 × 电光青 · 山地数字档案室
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 128px;
}

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dt, dd {
  margin: 0;
}

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

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

button { background: none; border: 0; cursor: pointer; }

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

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

table { border-collapse: collapse; width: 100%; }

hr { border: 0; border-top: 1px solid currentColor; opacity: .18; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-950: #081913;
  --ink-900: #0E2B24;
  --ink-700: #17453B;
  --ink-500: #2A6557;
  --copper: #C08B3E;
  --copper-200: #E4BC7C;
  --cyan: #4FE0C8;
  --cream: #EFE9DC;
  --cream-soft: #F6F2E8;
  --stone: #CFC9BC;
  --char: #16130F;
  --ember: #D9482B;

  --muted: #6A655A;
  --text-body: #3A362E;
  --line: rgba(22, 19, 15, .14);
  --line-dark: rgba(239, 233, 220, .16);

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

  --shell: 1280px;
  --gutter: clamp(20px, 4.5vw, 56px);
  --r-pill: 12px;
  --r-card: 16px;
  --r-sm: 8px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --dur: 420ms;
  --header-h: 72px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--cream);
  color: var(--char);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  font-weight: 600;
  letter-spacing: -.01em;
  line-height: 1.25;
}

h1 { font-size: clamp(1.85rem, 3.6vw, 2.9rem); }
h2 { font-size: clamp(1.5rem, 2.7vw, 2.15rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.35rem); }

::selection { background: var(--copper-200); color: var(--ink-900); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 4px;
  box-shadow: 0 0 0 4px rgba(22, 19, 15, .26);
}

/* ---------- 4. 工具类 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

.eyebrow {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--muted);
  line-height: 1.6;
}

.display {
  font-weight: 400;
  letter-spacing: -.02em;
  line-height: 1.05;
  font-size: clamp(2.3rem, 6.2vw, 5rem);
}

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 50%;
  transform: translate(-50%, -160%);
  z-index: 200;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--ink-900);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  transition: transform 220ms var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

.band {
  padding-block: clamp(48px, 7vw, 96px);
  position: relative;
}

.band--cream { background: var(--cream); }
.band--stone { background: var(--stone); }
.band--ink {
  background: var(--ink-900);
  color: rgba(239, 233, 220, .86);
}
.band--ink h1,
.band--ink h2,
.band--ink h3,
.band--ink h4 { color: var(--cream); }
.band--ink .eyebrow { color: rgba(239, 233, 220, .62); }
.band--ink .mono { color: var(--copper-200); }
.band--ink .section-head { border-bottom-color: var(--line-dark); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(24px, 3.6vw, 44px);
}

.section-head__title {
  font-size: clamp(1.35rem, 2.4vw, 1.95rem);
  font-weight: 600;
  letter-spacing: -.012em;
}

.section-head__meta {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.band--ink .section-head__meta { color: rgba(239, 233, 220, .6); }

.prose {
  max-width: 68ch;
  font-family: var(--font-serif);
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--text-body);
}

.prose p + p { margin-top: 1.2em; }
.prose h2 { margin: 2em 0 .6em; }
.prose h3 { margin: 1.6em 0 .5em; }
.prose ul,
.prose ol { margin: 1em 0; padding-left: 1.3em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .4em; }
.prose a { color: var(--ink-500); border-bottom: 1px solid var(--copper); }
.prose blockquote {
  border-left: 3px solid var(--copper);
  padding: 4px 0 4px 18px;
  color: var(--muted);
  font-style: normal;
}
.band--ink .prose { color: rgba(239, 233, 220, .82); }
.band--ink .prose a { color: var(--cyan); }

/* ---------- 5. 网格与骨架 ---------- */
.grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.split {
  display: grid;
  grid-template-columns: minmax(260px, 300px) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
}

.sticky-index {
  position: sticky;
  top: calc(var(--header-h) + 48px);
  align-self: start;
}

.index-nav {
  padding: 20px;
  background: rgba(14, 43, 36, .05);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
}

.index-nav__title {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--copper);
  margin-bottom: 14px;
}

.index-nav__list { display: flex; flex-direction: column; gap: 2px; }

.index-nav__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 11px;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  color: #4A463C;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.index-nav__link:hover { background: rgba(192, 139, 62, .16); color: var(--char); }

.index-nav__link.is-active {
  background: var(--ink-900);
  color: var(--cream);
}

.index-nav__link.is-active .index-nav__meta { color: var(--cyan); }

.index-nav__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #8A8474;
}

/* ---------- 6. 按钮与标签 ---------- */
.btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  cursor: pointer;
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 260ms var(--ease);
}

.btn--primary {
  background: var(--copper);
  color: var(--char);
}
.btn--primary::before { background: var(--copper-200); }
.btn--primary:hover::before { transform: scaleX(1); }

.btn--ghost {
  border-color: var(--ink-500);
  color: var(--ink-900);
}
.btn--ghost::before { background: var(--ink-900); }
.btn--ghost:hover { color: var(--cream); border-color: var(--ink-900); }
.btn--ghost:hover::before { transform: scaleX(1); }

.btn--sm { padding: 8px 16px; font-size: 13px; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(192, 139, 62, .42);
  background: rgba(192, 139, 62, .16);
  color: #7A5620;
  font-size: 11.5px;
  letter-spacing: .08em;
  line-height: 1.6;
}

.tag--alert {
  background: rgba(217, 72, 43, .12);
  border-color: rgba(217, 72, 43, .44);
  color: #8E2C19;
}

.tag--cyan {
  background: rgba(79, 224, 200, .16);
  border-color: rgba(79, 224, 200, .5);
  color: #0B4C42;
}

.band--ink .tag,
.site-footer .tag {
  background: rgba(79, 224, 200, .14);
  border-color: rgba(79, 224, 200, .4);
  color: var(--cyan);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px dashed rgba(228, 188, 124, .42);
  font-size: 12px;
  color: var(--copper-200);
  line-height: 1.7;
}

.version-badge__label {
  letter-spacing: .06em;
  color: rgba(239, 233, 220, .66);
}

/* ---------- 7. 卡片 / 步骤条 / 面包屑 ---------- */
.card {
  background: var(--cream-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: clamp(18px, 2.4vw, 28px);
  transition: border-color 220ms var(--ease), background 220ms var(--ease);
}

.card:hover { border-color: var(--copper); }

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

.card__title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
}

.card__meta {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.card__body {
  font-size: 14.5px;
  color: var(--text-body);
  line-height: 1.72;
}

.band--ink .card {
  background: rgba(239, 233, 220, .05);
  border-color: var(--line-dark);
}
.band--ink .card__title { color: var(--cream); }
.band--ink .card__body { color: rgba(239, 233, 220, .78); }
.band--ink .card__meta { color: rgba(239, 233, 220, .55); }

.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 0;
}

.steps__item {
  position: relative;
  flex: 1 1 200px;
  min-width: 160px;
  padding: 20px 22px 0 0;
}

.steps__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 22px;
  height: 2px;
  background: var(--line);
}

.steps__item:first-child::before { background: var(--copper); }

.band--ink .steps__item::before { background: var(--line-dark); }
.band--ink .steps__item:first-child::before { background: var(--copper); }

.steps__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--copper);
}

.steps__label {
  display: block;
  margin-top: 6px;
  font-size: 14.5px;
  color: var(--char);
  line-height: 1.65;
}

.band--ink .steps__label { color: rgba(239, 233, 220, .8); }

.breadcrumb { padding-block: 18px 0; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "／";
  margin-right: 6px;
  color: var(--copper);
}

.breadcrumb__link { transition: color 200ms var(--ease); }
.breadcrumb__link:hover { color: var(--ink-500); }

/* ---------- 8. 图片容器 ---------- */
.figure { margin: 0; }

.figure__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-card);
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(14, 43, 36, .96), rgba(23, 69, 59, .72)),
    var(--stone);
}

.figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(79, 224, 200, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 224, 200, .07) 1px, transparent 1px);
  background-size: 38px 38px;
  opacity: .8;
  pointer-events: none;
}

.figure__frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.82) contrast(1.04);
}

.figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--muted);
}

.band--ink .figure__caption { color: rgba(239, 233, 220, .58); }

.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--tall .figure__frame { aspect-ratio: 4 / 5; }

/* ---------- 9. 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 10. 头部 · 悬浮胶囊 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  padding: 24px var(--gutter) 0;
  pointer-events: none;
  transition: padding-top 320ms var(--ease);
}

.site-header[data-shrunk="true"] { padding-top: 12px; }

.header-shell {
  max-width: var(--shell);
  margin-inline: auto;
  pointer-events: auto;
}

.pill {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 26px);
  padding: 10px 14px 10px 18px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(79, 224, 200, .16);
  background: rgba(23, 69, 59, .88);
  -webkit-backdrop-filter: blur(14px) saturate(1.25);
  backdrop-filter: blur(14px) saturate(1.25);
  color: var(--cream);
  box-shadow: 0 20px 44px -26px rgba(8, 25, 19, .95);
  transition: padding 320ms var(--ease), background 320ms var(--ease);
}

.site-header[data-shrunk="true"] .pill {
  padding-block: 5px;
  background: rgba(14, 43, 36, .95);
}

/* 品牌 */
.brand {
  position: relative;
  flex: 0 0 auto;
  display: inline-flex;
  flex-direction: column;
  gap: 1px;
  padding-bottom: 9px;
}

.brand__mark {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.25;
  color: var(--cream);
}

.brand__domain {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: rgba(239, 233, 220, .58);
  transition: opacity 320ms var(--ease);
}

.brand__rule {
  position: absolute;
  left: 0;
  bottom: 3px;
  width: 34px;
  height: 2px;
  background: var(--copper);
}

.site-header[data-shrunk="true"] .brand__domain { opacity: .3; }

/* 导航 */
.nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, .9vw, 14px);
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  font-size: 14px;
  letter-spacing: .02em;
  color: rgba(239, 233, 220, .78);
  transition: color 200ms var(--ease), background 200ms var(--ease),
              font-size 320ms var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  background: var(--copper);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease);
}

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

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

.site-header[data-shrunk="true"] .nav__link {
  font-size: 13px;
  padding-block: 5px;
}

/* 右侧工具 */
.tools {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-btn {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid rgba(239, 233, 220, .2);
  background: rgba(239, 233, 220, .07);
  color: var(--cream);
  font-size: 12.5px;
  letter-spacing: .06em;
  line-height: 1.5;
  transition: background 200ms var(--ease), border-color 200ms var(--ease),
              color 200ms var(--ease);
}

.tool-btn:hover {
  background: rgba(192, 139, 62, .26);
  border-color: var(--copper-200);
  color: #fff;
}

.tool-btn[aria-expanded="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.tool-btn__short { display: none; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid rgba(239, 233, 220, .2);
  background: rgba(239, 233, 220, .07);
  color: var(--cream);
  font-size: 12.5px;
  letter-spacing: .06em;
}

.nav-toggle__bars {
  position: relative;
  width: 14px;
  height: 2px;
  background: var(--copper-200);
  border-radius: 2px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 14px;
  height: 2px;
  background: inherit;
  border-radius: 2px;
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars,
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before,
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  background: var(--ink-900);
}

/* 搜索 */
.search { position: relative; }

.search__input {
  width: 132px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid rgba(239, 233, 220, .2);
  background: rgba(8, 25, 19, .5);
  color: var(--cream);
  font-size: 12.5px;
  letter-spacing: .04em;
  transition: width 300ms var(--ease), border-color 200ms var(--ease),
              background 200ms var(--ease);
}

.search__input::placeholder {
  color: rgba(239, 233, 220, .5);
  letter-spacing: .06em;
}

.search__input:focus { outline: none; }

.search__input:focus-visible {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(79, 224, 200, .22);
}

.search[data-open="true"] .search__input {
  width: 208px;
  border-color: var(--cyan);
  background: rgba(8, 25, 19, .92);
}

.search__panel {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: min(322px, 84vw);
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--copper);
  background: var(--cream);
  color: var(--char);
  box-shadow: 0 30px 56px -30px rgba(8, 25, 19, .8);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease),
              visibility 200ms linear;
}

.search[data-open="true"] .search__panel {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.search__hint {
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 10px;
}

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

.search__item[hidden] { display: none; }

.search__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.search__link:hover { background: rgba(192, 139, 62, .18); }

.search__name { font-weight: 600; }

.search__meta { font-size: 11px; color: #8A8474; }

.search__empty {
  font-size: 12.5px;
  color: var(--muted);
  padding: 6px 4px;
}

/* 进度条 */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--copper), var(--cyan));
  z-index: 120;
  transition: width 120ms linear;
}

/* 站内索引抽屉 */
.drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 140;
  width: min(348px, 86vw);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  background: var(--ink-900);
  border-right: 1px solid rgba(79, 224, 200, .2);
  color: var(--cream);
  transform: translateX(-104%);
  visibility: hidden;
  pointer-events: auto;
  transition: transform 380ms var(--ease), visibility 380ms linear;
}

.drawer[data-open="true"] { transform: none; visibility: visible; }

.drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
}

.drawer__title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--cream);
}

.drawer__close {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--copper-200);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(228, 188, 124, .38);
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.drawer__close:hover { background: var(--copper-200); color: var(--ink-900); }

.drawer__note {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(239, 233, 220, .6);
}

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

.drawer__link {
  display: block;
  padding: 11px 12px;
  border-radius: var(--r-sm);
  font-size: 14.5px;
  color: rgba(239, 233, 220, .82);
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.drawer__link:hover {
  background: rgba(192, 139, 62, .22);
  color: #fff;
}

.drawer__link[aria-current="page"] {
  background: rgba(192, 139, 62, .26);
  color: var(--cream);
  box-shadow: inset 3px 0 0 var(--copper);
}

.drawer__foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line-dark);
}

.drawer__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: rgba(239, 233, 220, .5);
  line-height: 1.9;
}

.scrim {
  position: fixed;
  inset: 0;
  z-index: 130;
  background: rgba(8, 25, 19, .56);
  opacity: 0;
  visibility: hidden;
  pointer-events: auto;
  transition: opacity 300ms var(--ease), visibility 300ms linear;
}

.scrim[data-open="true"] { opacity: 1; visibility: visible; }

/* 会员中心提示 */
.member-note {
  position: fixed;
  top: 104px;
  right: var(--gutter);
  z-index: 140;
  width: min(304px, 84vw);
  padding: 18px;
  border-radius: 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--copper);
  background: var(--cream);
  color: var(--char);
  box-shadow: 0 26px 52px -30px rgba(8, 25, 19, .78);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  pointer-events: auto;
  transition: opacity 200ms var(--ease), transform 200ms var(--ease),
              visibility 200ms linear;
}

.member-note[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.member-note__title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  margin-bottom: 8px;
}

.member-note__text {
  font-size: 13px;
  line-height: 1.72;
  color: var(--text-body);
  margin-bottom: 14px;
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(56px, 8vw, 120px);
  padding-top: clamp(48px, 7vw, 88px);
  background: var(--ink-900);
  color: rgba(239, 233, 220, .8);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(79, 224, 200, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 224, 200, .055) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 72%);
}

.footer__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.5fr;
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(32px, 5vw, 56px);
}

.footer__brand { max-width: 40ch; }

.brand--footer { padding-bottom: 10px; }
.brand--footer .brand__mark { color: var(--cream); }
.brand--footer .brand__rule { bottom: 2px; }

.footer__desc {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(239, 233, 220, .68);
}

.footer__versions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.footer__col { min-width: 0; }

.footer__title {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--copper-200);
  margin-bottom: 16px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 14px;
}

.footer__links--contact { font-size: 13.5px; line-height: 1.72; }

.footer__link {
  color: rgba(239, 233, 220, .8);
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.footer__link:hover,
.footer__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.footer__links--contact .mono { color: var(--cream); }

.footer__legal {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  padding-block: 20px 28px;
  border-top: 1px solid var(--line-dark);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(239, 233, 220, .55);
}

.footer__legal-line { line-height: 1.7; }

.footer__legal-links {
  display: flex;
  gap: 18px;
  margin-left: auto;
}

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1279px) {
  .search__input { width: 108px; }
  .search[data-open="true"] .search__input { width: 176px; }
  .nav__link { padding-inline: 7px; font-size: 13.5px; }
  .tool-btn { padding-inline: 11px; font-size: 12px; }
  .footer__grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer__col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 1119px) {
  .brand__domain { display: none; }
}

@media (max-width: 1023px) {
  :root { --header-h: 64px; }

  .site-header { padding-top: 12px; }
  .site-header[data-shrunk="true"] { padding-top: 8px; }

  .pill { padding: 8px 10px 8px 14px; gap: 10px; }

  .search { display: none; }

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

  .nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: block;
    padding: 10px;
    border-radius: 14px;
    border: 1px solid rgba(79, 224, 200, .2);
    background: rgba(14, 43, 36, .98);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    box-shadow: 0 28px 52px -30px rgba(8, 25, 19, .95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 220ms var(--ease), transform 220ms var(--ease),
                visibility 220ms linear;
  }

  .nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__list { flex-direction: column; align-items: stretch; gap: 2px; }

  .nav__link {
    display: block;
    padding: 12px 14px;
    font-size: 15px;
  }

  .nav__link::after { display: none; }

  .nav__link:hover { background: rgba(192, 139, 62, .2); }

  .nav__link[aria-current="page"] {
    background: rgba(192, 139, 62, .26);
    box-shadow: inset 3px 0 0 var(--copper);
  }

  .site-header[data-shrunk="true"] .nav__link { font-size: 14px; padding-block: 11px; }

  .split { grid-template-columns: 1fr; }
  .sticky-index { position: static; }

  .grid--7-5,
  .grid--5-7,
  .grid--8-4 { grid-template-columns: 1fr; }

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

  .member-note { top: 84px; }
}

@media (max-width: 767px) {
  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__legal-links { margin-left: 0; width: 100%; }
}

@media (max-width: 639px) {
  .tool-btn__full { display: none; }
  .tool-btn__short { display: inline; }

  .brand__mark { font-size: 16px; }

  .steps__item { flex: 1 1 100%; padding-right: 0; }
  .steps__item::before { right: 0; }

  .footer__grid { grid-template-columns: 1fr; }
}

/* ---------- 13. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}