/* ==========================================================================
   皇冠体肓 · 共享站点样式 /assets/site.css
   暗色研究板体系：炭黑底 + 深靛蓝面板 + 皇冠金决策 + 电光青交互
   ========================================================================== */

:root {
  --crown-ink: #05070C;
  --crown-indigo: #0B1B3A;
  --crown-indigo-2: #12244A;
  --crown-steel: #2A3A5C;
  --crown-gold: #D4AF37;
  --crown-gold-hi: #F0D97A;
  --crown-cyan: #00E5FF;
  --crown-paper: #E8EDF7;
  --crown-muted: #7C8AA8;
  --crown-green: #2BD98B;

  --crown-cut: 18px;
  --crown-cut-sm: 10px;
  --crown-header-h: 56px;
  --crown-max: 1240px;
  --crown-gutter: 24px;

  --crown-font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --crown-font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --crown-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--crown-header-h) + 16px);
}

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

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

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

button { font: inherit; color: inherit; }

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--crown-ink);
  background-image:
    radial-gradient(circle at 10% -8%, rgba(11, 27, 58, 0.95), rgba(5, 7, 12, 0) 58%),
    radial-gradient(circle at 92% -4%, rgba(0, 229, 255, 0.08), rgba(5, 7, 12, 0) 46%),
    linear-gradient(180deg, #05070C 0%, #06090F 52%, #05070C 100%);
  color: var(--crown-paper);
  font-family: var(--crown-font-sans);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.012em;
  overflow-x: hidden;
}

p { color: inherit; }

a {
  color: var(--crown-gold);
  text-decoration: none;
  transition: color 0.22s var(--crown-ease);
}

a:hover { color: var(--crown-gold-hi); }

strong, b { font-weight: 700; color: var(--crown-paper); }

code, kbd, samp { font-family: var(--crown-font-mono); font-size: 0.92em; }

::selection {
  background: rgba(212, 175, 55, 0.32);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--crown-cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 跳转链接 ---------- */
.crown-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--crown-ink);
  background: linear-gradient(120deg, var(--crown-gold-hi), var(--crown-gold));
  box-shadow: 0 10px 30px -14px rgba(0, 0, 0, 0.9);
  transform: translateY(-180%);
  transition: transform 0.28s var(--crown-ease);
}

.crown-skip:focus,
.crown-skip:focus-visible {
  transform: translateY(0);
  color: var(--crown-ink);
  outline: 2px solid var(--crown-cyan);
  outline-offset: 3px;
}

/* ---------- 按钮 ---------- */
.crown-btn {
  --btn-cut: var(--crown-cut-sm);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 0;
  font-family: var(--crown-font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.3;
  text-align: center;
  color: var(--crown-paper);
  background: rgba(18, 36, 74, 0.72);
  box-shadow: inset 0 0 0 1px var(--crown-steel);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - var(--btn-cut)) 0, 100% var(--btn-cut), 100% 100%, var(--btn-cut) 100%, 0 calc(100% - var(--btn-cut)));
  transition: transform 0.28s var(--crown-ease), box-shadow 0.28s var(--crown-ease), background 0.28s var(--crown-ease), filter 0.28s var(--crown-ease);
}

.crown-btn:hover { transform: translateY(-1px); color: var(--crown-paper); }
.crown-btn:active { transform: translateY(0); }
.crown-btn:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--crown-cyan), inset 0 0 0 4px rgba(5, 7, 12, 0.65);
}

.crown-btn--gold {
  color: #120F02;
  background: linear-gradient(120deg, var(--crown-gold-hi), var(--crown-gold) 52%, #A8871F);
  box-shadow: inset 0 0 0 1px rgba(240, 217, 122, 0.55);
}

.crown-btn--gold:hover {
  color: #0B0900;
  filter: brightness(1.1);
  box-shadow: inset 0 0 0 1px rgba(240, 217, 122, 0.9), 0 14px 30px -18px rgba(212, 175, 55, 0.85);
}

.crown-btn--cyan {
  color: #03131A;
  background: linear-gradient(120deg, #8CF5FF, var(--crown-cyan) 55%, #009CAA);
  box-shadow: inset 0 0 0 1px rgba(140, 245, 255, 0.5);
}

.crown-btn--cyan:hover { color: #03131A; filter: brightness(1.08); }

.crown-btn--ghost {
  color: var(--crown-paper);
  background: transparent;
  box-shadow: inset 0 0 0 1px var(--crown-steel);
}

.crown-btn--ghost:hover {
  color: var(--crown-cyan);
  box-shadow: inset 0 0 0 1px var(--crown-cyan);
  filter: none;
}

.crown-btn--sm {
  --btn-cut: 8px;
  padding: 8px 16px;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.crown-btn--block { width: 100%; }

/* ---------- 头部命令栏 ---------- */
.crown-header {
  position: sticky;
  top: 0;
  z-index: 120;
  color: var(--crown-paper);
  background: linear-gradient(180deg, rgba(5, 7, 12, 0.97), rgba(11, 27, 58, 0.9));
  border-bottom: 1px solid rgba(42, 58, 92, 0.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.crown-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: var(--crown-max);
  min-height: var(--crown-header-h);
  margin-inline: auto;
  padding-inline: var(--crown-gutter);
}

/* 品牌 */
.crown-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 6px 0;
  color: var(--crown-paper);
  text-decoration: none;
}

.crown-brand__mark {
  width: 30px;
  height: 25px;
  flex: none;
  background: linear-gradient(160deg, var(--crown-gold-hi), var(--crown-gold) 48%, #8A6F18);
  clip-path: polygon(0 22%, 18% 58%, 32% 0, 50% 44%, 68% 0, 82% 58%, 100% 22%, 88% 100%, 12% 100%);
  filter: drop-shadow(0 0 7px rgba(212, 175, 55, 0.45));
  transition: filter 0.3s var(--crown-ease);
}

.crown-brand:hover .crown-brand__mark { filter: drop-shadow(0 0 12px rgba(0, 229, 255, 0.6)); }

.crown-brand__text { display: flex; flex-direction: column; line-height: 1.15; }

.crown-brand__name {
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--crown-paper);
  transition: color 0.22s var(--crown-ease);
}

.crown-brand:hover .crown-brand__name { color: var(--crown-gold-hi); }

.crown-brand__sub {
  font-family: var(--crown-font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--crown-muted);
  text-transform: uppercase;
}

/* 导航 */
.crown-nav { flex: 1 1 auto; min-width: 0; }

.crown-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
}

.crown-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 10px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--crown-muted);
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.22s var(--crown-ease);
}

.crown-nav__link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 1px;
  height: 2px;
  background: linear-gradient(90deg, var(--crown-gold), var(--crown-cyan));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.4s var(--crown-ease);
}

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

.crown-nav__link[aria-current="page"] {
  color: var(--crown-gold-hi);
  font-weight: 700;
}

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

.crown-nav__idx {
  font-family: var(--crown-font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: rgba(124, 138, 168, 0.75);
  transition: color 0.22s var(--crown-ease);
}

.crown-nav__link:hover .crown-nav__idx { color: var(--crown-cyan); }
.crown-nav__link[aria-current="page"] .crown-nav__idx { color: var(--crown-gold); }

/* 工具区 */
.crown-header__tools {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
  flex: none;
}

.crown-version {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  font-family: var(--crown-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--crown-muted);
  white-space: nowrap;
  background: rgba(18, 36, 74, 0.55);
  box-shadow: inset 0 0 0 1px rgba(42, 58, 92, 0.95);
}

.crown-version__dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--crown-green);
  box-shadow: 0 0 8px rgba(43, 217, 139, 0.85);
}

/* 移动导航按钮 */
.crown-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  color: var(--crown-paper);
  background: transparent;
  border: 0;
  box-shadow: inset 0 0 0 1px var(--crown-steel);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: box-shadow 0.28s var(--crown-ease), color 0.28s var(--crown-ease);
}

.crown-navtoggle:hover {
  color: var(--crown-cyan);
  box-shadow: inset 0 0 0 1px var(--crown-cyan);
}

.crown-navtoggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 12px;
  flex: none;
}

.crown-navtoggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--crown-gold);
  transition: transform 0.32s var(--crown-ease), opacity 0.2s linear;
}

.crown-header[data-open] .crown-navtoggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.crown-header[data-open] .crown-navtoggle__bars span:nth-child(2) { opacity: 0; }
.crown-header[data-open] .crown-navtoggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.crown-navtoggle__label { line-height: 1; }

/* 滚动进度 */
.crown-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(42, 58, 92, 0.35);
}

.crown-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--crown-gold), var(--crown-gold-hi) 52%, var(--crown-cyan));
}

/* ---------- 页脚 ---------- */
.crown-footer {
  position: relative;
  margin-top: 96px;
  color: var(--crown-paper);
  background: linear-gradient(180deg, rgba(11, 27, 58, 0.98) 0%, rgba(5, 7, 12, 1) 88%);
  border-top: 1px solid rgba(42, 58, 92, 0.9);
}

.crown-footer::before {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--crown-gold), var(--crown-gold-hi) 42%, var(--crown-cyan));
  transform: skewY(-0.4deg);
  transform-origin: left center;
}

.crown-footer__inner {
  display: grid;
  grid-template-columns: minmax(220px, 290px) minmax(0, 1fr);
  gap: 48px;
  width: 100%;
  max-width: var(--crown-max);
  margin-inline: auto;
  padding: 64px var(--crown-gutter) 44px;
}

.crown-brand--footer .crown-brand__name { font-size: 18px; letter-spacing: 0.1em; }
.crown-brand--footer .crown-brand__mark { width: 34px; height: 28px; }

.crown-footer__tagline {
  margin-top: 20px;
  max-width: 26em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--crown-muted);
}

.crown-footer__meta {
  margin-top: 14px;
  font-family: var(--crown-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(124, 138, 168, 0.85);
}

.crown-footer__cols {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 32px 20px;
}

.crown-footer__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(42, 58, 92, 0.75);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.5;
  color: var(--crown-gold);
}

.crown-footer__list li + li { margin-top: 9px; }

.crown-footer__link {
  position: relative;
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--crown-muted);
  text-decoration: none;
  transition: color 0.22s var(--crown-ease);
}

.crown-footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: linear-gradient(90deg, var(--crown-cyan), rgba(0, 229, 255, 0));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.38s var(--crown-ease);
}

.crown-footer__link:hover { color: var(--crown-paper); }
.crown-footer__link:hover::after { transform: scaleX(1); }

.crown-footer__note {
  margin-top: 12px;
  font-family: var(--crown-font-mono);
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: rgba(124, 138, 168, 0.9);
  word-break: break-word;
}

.crown-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 28px;
  width: 100%;
  max-width: var(--crown-max);
  margin-inline: auto;
  padding: 22px var(--crown-gutter) 40px;
  border-top: 1px solid rgba(42, 58, 92, 0.7);
}

.crown-footer__legal-line {
  font-family: var(--crown-font-mono);
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: rgba(124, 138, 168, 0.85);
}

.crown-footer__copy {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--crown-muted);
}

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

.crown-section { padding-block: 88px; }
.crown-section--tight { padding-block: 56px; }

.crown-section--panel {
  border-top: 1px solid rgba(42, 58, 92, 0.55);
  border-bottom: 1px solid rgba(42, 58, 92, 0.55);
  background: linear-gradient(180deg, rgba(11, 27, 58, 0.6), rgba(5, 7, 12, 0.1));
}

.crown-grid { display: grid; gap: 24px; }
.crown-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.crown-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.crown-grid--split {
  grid-template-columns: minmax(0, 55fr) minmax(0, 45fr);
  align-items: start;
  gap: 48px;
}

.crown-stack { display: flex; flex-direction: column; gap: 16px; }
.crown-stack--lg { display: flex; flex-direction: column; gap: 32px; }
.crown-cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

/* ---------- 面包屑 ---------- */
.crown-breadcrumb { font-family: var(--crown-font-mono); font-size: 12px; letter-spacing: 0.08em; }

.crown-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--crown-muted);
}

.crown-breadcrumb li + li::before {
  content: "／";
  margin-right: 8px;
  color: var(--crown-steel);
}

.crown-breadcrumb a { color: var(--crown-muted); }
.crown-breadcrumb a:hover { color: var(--crown-cyan); }
.crown-breadcrumb [aria-current="page"] { color: var(--crown-paper); }

/* ---------- 标题体系 ---------- */
.crown-display {
  font-size: clamp(44px, 6.4vw, 96px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.crown-h1 {
  font-size: clamp(32px, 4.2vw, 52px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.crown-h2 {
  position: relative;
  padding-left: 18px;
  font-size: clamp(24px, 2.6vw, 36px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.005em;
}

.crown-h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.24em;
  bottom: 0.24em;
  width: 4px;
  background: linear-gradient(180deg, var(--crown-gold-hi), var(--crown-gold));
}

.crown-h3 {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.005em;
}

.crown-eyebrow {
  font-family: var(--crown-font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--crown-cyan);
}

.crown-lead {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--crown-muted);
}

.crown-muted { color: var(--crown-muted); }

.crown-gold-text {
  background: linear-gradient(180deg, var(--crown-gold-hi), var(--crown-gold) 70%, #A8871F);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 分隔线 ---------- */
.crown-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--crown-gold), rgba(42, 58, 92, 0.45) 42%, rgba(42, 58, 92, 0));
}

.crown-slant {
  height: 2px;
  border: 0;
  background: linear-gradient(90deg, var(--crown-gold), var(--crown-cyan));
  transform: skewY(-0.6deg);
  transform-origin: left center;
}

/* ---------- 切角面板 ---------- */
.crown-panel {
  position: relative;
  padding: 32px;
  background: linear-gradient(155deg, rgba(18, 36, 74, 0.88), rgba(11, 27, 58, 0.94) 58%, rgba(5, 7, 12, 0.96));
  box-shadow: inset 0 0 0 1px rgba(42, 58, 92, 0.85);
  clip-path: polygon(0 0, calc(100% - var(--crown-cut)) 0, 100% var(--crown-cut), 100% 100%, var(--crown-cut) 100%, 0 calc(100% - var(--crown-cut)));
}

.crown-panel--interactive { transition: transform 0.42s var(--crown-ease), box-shadow 0.42s var(--crown-ease); }

.crown-panel--interactive:hover {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 1px var(--crown-gold), 0 22px 44px -28px rgba(0, 229, 255, 0.55);
}

.crown-panel__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.crown-panel__index {
  font-family: var(--crown-font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--crown-gold);
}

.crown-panel__head::after {
  content: "";
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, var(--crown-gold), rgba(212, 175, 55, 0));
}

.crown-panel__title {
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--crown-paper);
}

/* ---------- 图片容器 ---------- */
.crown-media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(140deg, #0B1B3A, #05070C 72%);
  box-shadow: inset 0 0 0 1px rgba(42, 58, 92, 0.9);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.crown-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.07) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.crown-media img,
.crown-media video {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.crown-media--21x9 { aspect-ratio: 21 / 9; }
.crown-media--4x3 { aspect-ratio: 4 / 3; }
.crown-media--3x2 { aspect-ratio: 3 / 2; }
.crown-media--1x1 { aspect-ratio: 1 / 1; }

.crown-media__caption {
  margin-top: 10px;
  font-family: var(--crown-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--crown-muted);
}

/* ---------- 标签与状态 ---------- */
.crown-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  font-family: var(--crown-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--crown-cyan);
  background: rgba(0, 229, 255, 0.07);
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.35);
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

.crown-tag--gold {
  color: var(--crown-gold-hi);
  background: rgba(212, 175, 55, 0.1);
  box-shadow: inset 0 0 0 1px rgba(212, 175, 55, 0.45);
}

.crown-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--crown-muted);
}

.crown-status::before {
  content: "";
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--crown-green);
  box-shadow: 0 0 8px rgba(43, 217, 139, 0.8);
}

/* ---------- 主题筛选 ---------- */
.crown-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.crown-filter__btn {
  --btn-cut: 8px;
  padding: 8px 14px;
  border: 0;
  font-family: var(--crown-font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.4;
  color: var(--crown-muted);
  background: rgba(18, 36, 74, 0.5);
  box-shadow: inset 0 0 0 1px var(--crown-steel);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - var(--btn-cut)) 0, 100% var(--btn-cut), 100% 100%, var(--btn-cut) 100%, 0 calc(100% - var(--btn-cut)));
  transition: color 0.24s var(--crown-ease), box-shadow 0.24s var(--crown-ease), background 0.24s var(--crown-ease);
}

.crown-filter__btn:hover {
  color: var(--crown-paper);
  box-shadow: inset 0 0 0 1px var(--crown-cyan);
}

.crown-filter__btn:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--crown-cyan);
}

.crown-filter__btn[aria-pressed="true"] {
  color: #120F02;
  background: linear-gradient(120deg, var(--crown-gold-hi), var(--crown-gold) 60%, #A8871F);
  box-shadow: inset 0 0 0 1px rgba(240, 217, 122, 0.7);
}

.crown-filter__status {
  margin-left: 4px;
  font-family: var(--crown-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--crown-muted);
}

[data-filter-item].is-hidden { display: none !important; }

/* ---------- 列表 ---------- */
.crown-list li {
  position: relative;
  padding-left: 20px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--crown-muted);
}

.crown-list li + li { margin-top: 10px; }

.crown-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 9px;
  height: 2px;
  background: var(--crown-gold);
}

/* ---------- 显现动效 ---------- */
[data-reveal].is-revealed {
  animation: crownRise 0.62s var(--crown-ease) both;
  animation-delay: var(--reveal-delay, 0ms);
}

@keyframes crownRise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

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

/* ---------- 响应式：头部 ---------- */
@media (max-width: 1180px) {
  .crown-nav__link { padding: 8px 8px; font-size: 13px; }
  .crown-nav__link::after { left: 8px; right: 8px; }
  .crown-version { font-size: 11px; padding: 5px 8px; }
  .crown-header__inner { gap: 14px; }
}

@media (max-width: 980px) {
  .crown-header__inner {
    flex-wrap: wrap;
    gap: 10px;
    padding-block: 8px;
  }

  .crown-navtoggle { display: inline-flex; order: 4; margin-left: 0; }

  .crown-header__tools { order: 3; margin-left: auto; }

  .crown-nav {
    order: 5;
    flex: 1 0 100%;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    max-height: calc(100vh - var(--crown-header-h));
    overflow-y: auto;
    padding: 10px var(--crown-gutter) 18px;
    background: linear-gradient(180deg, rgba(8, 12, 20, 0.99), rgba(11, 27, 58, 0.99));
    border-bottom: 1px solid var(--crown-steel);
    box-shadow: 0 24px 48px -30px rgba(0, 0, 0, 0.95);
  }

  .crown-header[data-open] .crown-nav { display: block; }

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

  .crown-nav__link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 13px 6px;
    font-size: 15px;
    border-bottom: 1px dashed rgba(42, 58, 92, 0.65);
  }

  .crown-nav__link::after { left: 6px; right: auto; width: 72px; bottom: 4px; }

  .crown-nav li:last-child .crown-nav__link { border-bottom: 0; }
}

@media (max-width: 640px) {
  :root { --crown-gutter: 18px; }

  body { font-size: 16px; line-height: 1.8; }

  .crown-version { font-size: 10px; padding: 5px 7px; letter-spacing: 0.06em; }
  .crown-brand__sub { font-size: 9px; letter-spacing: 0.14em; }
  .crown-brand__mark { width: 26px; height: 22px; }
}

@media (max-width: 460px) {
  .crown-brand__sub { display: none; }
  .crown-navtoggle__label { display: none; }
  .crown-navtoggle { padding: 9px 11px; }
}

/* ---------- 响应式：页脚与通用 ---------- */
@media (max-width: 1100px) {
  .crown-footer__cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .crown-section { padding-block: 64px; }
  .crown-grid--2,
  .crown-grid--3,
  .crown-grid--split { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .crown-panel { padding: 24px; }
  .crown-footer { margin-top: 64px; }
  .crown-footer__inner { grid-template-columns: minmax(0, 1fr); gap: 36px; padding-top: 48px; }
}

@media (max-width: 640px) {
  .crown-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 16px; }
  .crown-footer__copy { margin-left: 0; }
  .crown-footer__legal { gap: 6px 18px; padding-bottom: 32px; }
  .crown-panel { --crown-cut: 12px; padding: 20px; }
  .crown-grid--split { gap: 28px; }
}

@media (max-width: 420px) {
  .crown-footer__cols { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }

  [data-reveal].is-revealed { animation: none; opacity: 1; transform: none; }

  .crown-btn:hover,
  .crown-panel--interactive:hover { transform: none; }

  .crown-footer::before,
  .crown-slant { transform: none; }
}