/* ==========================================================================
   新葡萄8883官网 · 共享样式表 /assets/site.css
   深紫档案馆基调 · 切角面板 · 等宽索引
   ========================================================================== */

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(120% 68% at 100% 0%, rgba(74, 29, 110, .14), transparent 58%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
[hidden] { display: none !important; }

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.34;
}

p { margin: 0 0 1em; }
ul, ol { margin: 0; }
a { color: inherit; }
button { font: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  --violet-900: #1A0B29;
  --violet-800: #2B1140;
  --violet-700: #4A1D6E;
  --violet-500: #7A3FA6;
  --green-600: #2E8B57;
  --gold: #D4AF37;
  --gold-line: rgba(212, 175, 55, .22);
  --gold-edge: rgba(212, 175, 55, .5);
  --ice: #8FD9E8;
  --pink: #F4C7D4;
  --paper: #F5F1E8;
  --ink: #241333;
  --mist: #6E6A78;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --fs-body: 16px;
  --shell-w: 1180px;
  --pill: 999px;
  --ease: cubic-bezier(.2, .7, .3, 1);
  --dur: 180ms;
}

@media (min-width: 1024px) {
  :root { --fs-body: 17px; }
}

/* ---------- 3. 焦点 ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: .7em 1.2em;
  border-radius: 3px;
  background: var(--gold);
  color: #2A1607;
  font-size: 14px;
  text-decoration: none;
  transform: translateY(-220%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 5. 容器 ---------- */
.shell {
  width: min(100% - 2.5rem, var(--shell-w));
  margin-inline: auto;
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  padding: 10px 0 12px;
  background: linear-gradient(180deg, #1A0B29 0%, #221035 74%, rgba(34, 16, 53, .95) 100%);
  border-bottom: 1px solid var(--gold-line);
  box-shadow: 0 18px 40px -34px rgba(0, 0, 0, .9);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  display: block;
  width: 100%;
  height: 2px;
  transform: scaleX(var(--p, 0));
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold), var(--green-600) 55%, var(--ice));
  pointer-events: none;
}

.header-shell {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 品牌浮岛 */
.brand-island {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 16px 5px 7px;
  border: 1px solid var(--gold-line);
  border-radius: var(--pill);
  background: rgba(122, 63, 166, .26);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.brand-island:hover {
  border-color: var(--gold-edge);
  background: rgba(122, 63, 166, .48);
}

.brand-mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--gold);
  background: radial-gradient(circle at 34% 28%, rgba(212, 175, 55, .38), rgba(46, 139, 87, .32) 70%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: .05em;
}

.brand-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: rgba(143, 217, 232, .85);
}

/* 导航浮岛 */
.nav-capsule {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 4px;
  list-style: none;
  border: 1px solid var(--gold-line);
  border-radius: var(--pill);
  background: rgba(74, 29, 110, .45);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 14px;
  border-radius: var(--pill);
  font-size: 15px;
  color: rgba(245, 241, 232, .82);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.nav-link:hover {
  background: rgba(122, 63, 166, .58);
  color: #fff;
}

.nav-link[aria-current="page"] {
  background: var(--violet-500);
  color: #fff;
  box-shadow: inset 0 0 0 1px var(--gold);
}

@media (max-width: 1180px) {
  .nav-link { padding: 0 11px; font-size: 14px; }
}

/* 右侧岛屿 */
.header-aside {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.version-seal {
  display: inline-grid;
  place-items: center;
  gap: 1px;
  width: 52px;
  height: 52px;
  border: 1px solid rgba(212, 175, 55, .55);
  border-radius: 50%;
  background: radial-gradient(circle at 34% 26%, rgba(212, 175, 55, .32), rgba(74, 29, 110, .6) 70%);
  color: var(--gold);
  font-family: var(--font-mono);
  line-height: 1;
  text-align: center;
}

.version-seal b { font-size: 13px; font-weight: 600; letter-spacing: .02em; }
.version-seal i { font-size: 9px; font-style: normal; letter-spacing: .16em; color: rgba(245, 241, 232, .78); }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--gold-line);
  border-radius: 50%;
  background: rgba(122, 63, 166, .32);
  color: var(--paper);
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: var(--gold-edge); background: rgba(122, 63, 166, .55); }

.nav-toggle-bars { display: grid; gap: 4px; width: 18px; }

.nav-toggle-bars i {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* ---------- 7. 侧滑抽屉 ---------- */
.nav-drawer {
  position: fixed;
  inset: 0;
  z-index: 150;
  visibility: hidden;
  pointer-events: none;
}

.nav-drawer[data-open] {
  visibility: visible;
  pointer-events: auto;
}

.drawer-scrim {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: rgba(10, 4, 18, .72);
  opacity: 0;
  cursor: pointer;
  transition: opacity var(--dur) var(--ease);
}

.nav-drawer[data-open] .drawer-scrim { opacity: 1; }

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: min(340px, 88vw);
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px 20px calc(24px + env(safe-area-inset-bottom, 0px));
  overflow-y: auto;
  background: linear-gradient(170deg, #2E1146, #170A26 72%);
  border-left: 1px solid rgba(212, 175, 55, .4);
  box-shadow: -26px 0 52px rgba(0, 0, 0, .5);
  transform: translateX(102%);
  transition: transform 220ms var(--ease);
}

.nav-drawer[data-open] .drawer-panel { transform: none; }

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--gold-line);
}

.drawer-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
}

.drawer-close {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--gold-line);
  border-radius: 50%;
  background: transparent;
  color: var(--paper);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.drawer-close:hover { border-color: var(--gold); background: rgba(212, 175, 55, .14); }

.drawer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.drawer-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 12px;
  border-left: 2px solid transparent;
  border-radius: 3px;
  color: rgba(245, 241, 232, .86);
  text-decoration: none;
  font-size: 16px;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.drawer-link::after {
  content: "›";
  font-family: var(--font-mono);
  color: rgba(212, 175, 55, .55);
}

.drawer-link:hover {
  background: rgba(122, 63, 166, .38);
  border-left-color: var(--gold);
  color: #fff;
}

.drawer-link[aria-current="page"] {
  background: rgba(122, 63, 166, .5);
  border-left-color: var(--gold);
  color: #fff;
}

.drawer-foot {
  margin-top: auto;
  display: grid;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--gold-line);
}

.drawer-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(245, 241, 232, .6);
}

/* ---------- 8. 底部标签栏 ---------- */
.tabbar { display: none; }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  min-height: 42px;
  padding: .6em 1.35em;
  border: 1px solid transparent;
  border-radius: 3px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn:active { transform: translateY(1px); }
.btn-sm { min-height: 36px; padding: .42em 1em; font-size: 14px; }
.btn-block { width: 100%; }

.btn-gold {
  background: linear-gradient(135deg, #E4C558, var(--gold) 56%, #B08F22);
  color: #2A1607;
  border-color: rgba(42, 22, 7, .22);
}

.btn-gold:hover { background: linear-gradient(135deg, #F0D676, #DFBC44 56%, #C39B27); }

.btn-green {
  background: var(--green-600);
  color: #F2FBF6;
  border-color: rgba(0, 0, 0, .18);
}

.btn-green:hover { background: #37A163; }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(212, 175, 55, .45);
}

.btn-ghost:hover { background: rgba(212, 175, 55, .14); border-color: var(--gold); }

/* ---------- 10. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 108px);
  padding-top: clamp(44px, 6vw, 78px);
  overflow: hidden;
  color: rgba(245, 241, 232, .84);
  border-top: 1px solid rgba(212, 175, 55, .42);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(122, 63, 166, .42), transparent 62%),
    radial-gradient(90% 70% at 0% 100%, rgba(46, 139, 87, .18), transparent 60%),
    linear-gradient(180deg, #1A0B29 0%, #130821 58%, #0E0619 100%);
}

.footer-vine {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(115deg, transparent 0 45.6%, rgba(212, 175, 55, .10) 45.6% 45.9%, transparent 45.9%),
    linear-gradient(64deg, transparent 0 71.6%, rgba(143, 217, 232, .08) 71.6% 71.9%, transparent 71.9%);
}

.footer-shell {
  position: relative;
  display: grid;
  gap: 34px;
  padding-bottom: 40px;
}

.footer-brand {
  display: grid;
  gap: 12px;
  align-content: start;
  justify-items: start;
}

.footer-brand-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: .05em;
  color: var(--paper);
}

.footer-brand-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(245, 241, 232, .62);
}

.footer-col {
  display: grid;
  gap: 12px;
  align-content: start;
}

.footer-col-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--gold);
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.footer-link {
  display: inline;
  font-size: 14.5px;
  color: rgba(245, 241, 232, .78);
  text-decoration: none;
  background-image: linear-gradient(var(--gold), var(--gold));
  background-size: 0 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  padding-bottom: 2px;
  transition: background-size var(--dur) var(--ease), color var(--dur) var(--ease);
}

a.footer-link:hover,
a.footer-link:focus-visible {
  color: var(--gold);
  background-size: 100% 1px;
}

.footer-link-plain {
  background-image: none;
  color: rgba(245, 241, 232, .7);
  word-break: break-word;
}

.footer-note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(245, 241, 232, .5);
}

.footer-legal {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding: 18px 0 24px;
  border-top: 1px solid rgba(212, 175, 55, .2);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: rgba(245, 241, 232, .55);
}

.footer-legal p { margin: 0; }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

@media (min-width: 760px) {
  .footer-shell { grid-template-columns: 1.45fr 1fr 1fr 1.35fr; gap: 30px; }
}

/* ---------- 11. 章节与页面开篇 ---------- */
.section {
  position: relative;
  padding-block: clamp(40px, 6vw, 82px);
}

.section-tight { padding-block: clamp(26px, 4vw, 50px); }

.section-dark {
  color: rgba(245, 241, 232, .88);
  border-block: 1px solid rgba(212, 175, 55, .25);
  background: linear-gradient(180deg, #1A0B29, #241038 100%);
}

.section-paper { background: var(--paper); color: var(--ink); }

.page-head { padding-block: clamp(30px, 5vw, 62px) clamp(18px, 3vw, 34px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--green-600);
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.page-title { font-size: clamp(28px, 4.6vw, 50px); }

.page-lead {
  max-width: 38ch;
  margin-top: 14px;
  font-size: 1.05rem;
  color: var(--mist);
}

.display-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(56px, 12vw, 96px);
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--gold);
}

.section-dark .eyebrow { color: var(--ice); }
.section-dark .page-lead { color: rgba(245, 241, 232, .72); }
.section-dark .card {
  color: rgba(245, 241, 232, .88);
  background: rgba(255, 255, 255, .05);
  border-color: rgba(212, 175, 55, .22);
  border-left-color: var(--ice);
}
.section-dark .card-title { color: var(--paper); }
.section-dark .card-meta { color: rgba(143, 217, 232, .82); }

/* ---------- 12. 面包屑 ---------- */
.breadcrumb {
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li::after {
  content: "/";
  margin-left: 6px;
  color: rgba(212, 175, 55, .55);
}

.breadcrumb li:last-child::after { content: ""; }
.breadcrumb a { text-decoration: none; }
.breadcrumb a:hover { color: var(--violet-700); }

/* ---------- 13. 正文 ---------- */
.prose { max-width: 36em; }
.prose > * + * { margin-top: 1em; }

.prose h2 { margin-top: 2em; font-size: 1.5rem; }
.prose h3 { margin-top: 1.6em; font-size: 1.2rem; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin-bottom: .4em; }

.prose a {
  color: var(--violet-700);
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size var(--dur) var(--ease), color var(--dur) var(--ease);
}

.prose a:hover {
  color: var(--green-600);
  background-size: 100% 1px;
}

.prose blockquote {
  margin: 1.6em 0;
  padding: 14px 18px;
  border-left: 3px solid var(--gold);
  background: rgba(244, 199, 212, .35);
  color: var(--ink);
}

.prose blockquote p:last-child { margin-bottom: 0; }

/* ---------- 14. 网格 ---------- */
.grid { display: grid; gap: clamp(16px, 2.4vw, 26px); }

@media (min-width: 680px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.split {
  display: grid;
  gap: clamp(22px, 4vw, 52px);
  align-items: start;
}

@media (min-width: 900px) {
  .split { grid-template-columns: 1.42fr .78fr; }
  .split-rev { grid-template-columns: .78fr 1.42fr; }
}

/* ---------- 15. 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid rgba(36, 19, 51, .10);
  border-radius: 3px;
  background: #fff;
}

.panel-cut {
  --cut: 18px;
  padding: clamp(18px, 2.4vw, 28px);
  border-radius: 0;
  border: 0;
  background: linear-gradient(150deg, #FFFFFF, #EFE8DA);
  clip-path: polygon(
    var(--cut) 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%,
    0 var(--cut)
  );
}

.panel-dark {
  color: rgba(245, 241, 232, .88);
  background:
    radial-gradient(120% 100% at 18% 0%, rgba(122, 63, 166, .5), transparent 64%),
    linear-gradient(160deg, #2B1140, #150A22);
}

/* ---------- 16. 卡片 ---------- */
.card {
  position: relative;
  display: grid;
  gap: 10px;
  padding: clamp(16px, 2vw, 22px);
  border: 1px solid rgba(36, 19, 51, .10);
  border-left: 3px solid var(--violet-500);
  border-radius: 3px;
  background: #fff;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.card:hover {
  border-color: rgba(212, 175, 55, .6);
  border-left-color: var(--gold);
  box-shadow: 0 18px 36px -24px rgba(26, 11, 41, .7);
}

.card-version { border-left-color: var(--ice); }
.card-note { border-left-color: var(--pink); }

.card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: .02em;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

/* ---------- 17. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .28em .8em;
  border: 1px solid rgba(36, 19, 51, .14);
  border-radius: var(--pill);
  background: rgba(122, 63, 166, .1);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--violet-700);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.tag:hover {
  background: var(--violet-500);
  color: #fff;
  border-color: var(--gold);
}

.tag-green { background: rgba(46, 139, 87, .12); color: #1F6B41; border-color: rgba(46, 139, 87, .3); }
.tag-ice { background: rgba(143, 217, 232, .2); color: #14555F; border-color: rgba(143, 217, 232, .5); }
.tag-pink { background: rgba(244, 199, 212, .4); color: #8A3B56; border-color: rgba(244, 199, 212, .75); }

/* ---------- 18. 时间轴 ---------- */
.timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  display: grid;
  gap: 22px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(212, 175, 55, .05));
}

.timeline-item { position: relative; }

.timeline-node {
  position: absolute;
  left: -25px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--paper);
}

.timeline-item[data-state="done"] .timeline-node {
  background: var(--green-600);
  border-color: var(--green-600);
}

.timeline-item[data-state="current"] .timeline-node {
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, .22);
}

/* ---------- 19. 数字指标 ---------- */
.stat { display: grid; gap: 4px; }

.stat-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--violet-700);
}

.stat-label {
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--mist);
}

/* ---------- 20. 折叠面板 ---------- */
.accordion {
  display: grid;
  border-top: 1px solid rgba(36, 19, 51, .12);
}

.accordion-item { border-bottom: 1px solid rgba(36, 19, 51, .12); }

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 2px;
  border: 0;
  background: transparent;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.accordion-trigger:hover { color: var(--violet-700); }

.accordion-trigger::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-right: 3px;
  border-right: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.accordion-trigger[aria-expanded="true"]::after { transform: rotate(-135deg); }

.accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  opacity: 0;
  transition: grid-template-rows 220ms var(--ease), opacity 220ms var(--ease), visibility 0s linear 220ms;
}

.accordion-item.is-open .accordion-panel {
  grid-template-rows: 1fr;
  visibility: visible;
  opacity: 1;
  transition: grid-template-rows 220ms var(--ease), opacity 220ms var(--ease), visibility 0s;
}

.accordion-panel > div {
  overflow: hidden;
  padding: 0 2px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.section-dark .accordion,
.section-dark .accordion-item { border-color: rgba(245, 241, 232, .16); }
.section-dark .accordion-panel > div { color: rgba(245, 241, 232, .7); }

/* ---------- 21. 筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: .4em 1em;
  border: 1px solid rgba(36, 19, 51, .16);
  border-radius: var(--pill);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mist);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.filter-btn:hover { border-color: var(--violet-500); color: var(--violet-700); }

.filter-btn[aria-pressed="true"] {
  background: var(--violet-700);
  border-color: var(--gold);
  color: var(--paper);
}

/* ---------- 22. 图片容器 ---------- */
.figure {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 3px;
  background:
    radial-gradient(120% 90% at 22% 8%, rgba(122, 63, 166, .55), transparent 62%),
    linear-gradient(160deg, #2B1140, #12081F 70%);
  box-shadow: inset 0 0 0 1px rgba(212, 175, 55, .22);
}

.figure > img,
.figure > picture > img,
.figure > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.figure-cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 23. 工具类 ---------- */
.mono {
  font-family: var(--font-mono);
  letter-spacing: .06em;
}

.rule {
  height: 1px;
  margin: clamp(24px, 4vw, 44px) 0;
  border: 0;
  background: linear-gradient(90deg, var(--gold), rgba(212, 175, 55, .05));
}

/* ---------- 24. 回到顶部 ---------- */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 30px);
  bottom: clamp(20px, 4vh, 34px);
  z-index: 70;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid rgba(212, 175, 55, .5);
  border-radius: 50%;
  background: rgba(26, 11, 41, .92);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

/* ---------- 25. 响应式：移动 / 平板 ---------- */
@media (max-width: 1023px) {
  .nav-capsule { display: none; }
  .nav-toggle { display: inline-grid; }
  .header-cta { display: none; }
  .version-seal { width: 44px; height: 44px; }
  .version-seal b { font-size: 11px; }
  .version-seal i { font-size: 8px; letter-spacing: .1em; }
  .header-shell { justify-content: space-between; }

  .tabbar {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    padding: 4px 6px calc(4px + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid rgba(212, 175, 55, .32);
    background: rgba(26, 11, 41, .98);
  }

  .tab {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 4px;
    border-radius: 3px;
    font-size: 12.5px;
    color: rgba(245, 241, 232, .68);
    text-decoration: none;
    transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
  }

  .tab::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    width: 20px;
    height: 2px;
    background: var(--gold);
    transform: translateX(-50%) scaleX(0);
    transition: transform var(--dur) var(--ease);
  }

  .tab:hover { color: #fff; }

  .tab[aria-current="page"] { color: var(--gold); }

  .tab[aria-current="page"]::before { transform: translateX(-50%) scaleX(1); }

  .to-top { bottom: calc(74px + env(safe-area-inset-bottom, 0px)); }

  .site-footer { padding-bottom: calc(84px + env(safe-area-inset-bottom, 0px)); }
}

@media (max-width: 420px) {
  .brand-meta { display: none; }
  .tab { font-size: 11.5px; }
}

.is-nav-open { overflow: hidden; }

/* ---------- 26. 无动画偏好 ---------- */
@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;
  }
}