/* ==========================================================================
   易丰娱乐汇 · 共享样式表 /assets/site.css
   暗色数据中枢：深空蓝底 + 霓虹青 + 琥珀金，切角面板与左右分屏
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 矿物色体系 */
  --space-900: #08131F;
  --space-800: #0B1A29;
  --panel: #0F2133;
  --cyan: #25E0D4;
  --cyan-soft: #7FF3EC;
  --amber: #F5B23C;
  --amber-soft: #FFC968;
  --slate: #5C6E7E;
  --moss: #3E8E7E;
  --moss-soft: #63B7A4;
  --terracotta: #C2704E;
  --terracotta-soft: #E09B77;
  --ceramic: #EDF3F7;
  --ink: #04090F;

  /* 线条与层次 */
  --line: rgba(127, 243, 236, 0.16);
  --line-soft: rgba(92, 110, 126, 0.24);

  /* 字体 */
  --font-display: 'Archivo Black', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺度 */
  --shell: 1320px;
  --gutter: clamp(1.1rem, 4vw, 3.25rem);
  --cut: 18px;
  --cut-sm: 11px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --speed: 0.28s;
}

@media (max-width: 640px) {
  :root { --cut: 13px; }
}

/* ---------- 2. 重置与中文排版 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--space-900);
  color: var(--ceramic);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  word-break: normal;
  line-break: strict;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, pre { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }

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

.btn:focus-visible,
.utility-link:focus-visible,
.tag:focus-visible,
.nav-toggle:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--cyan), inset 0 0 0 3px rgba(4, 9, 15, 0.9);
}

::selection { background: var(--cyan); color: var(--ink); }

h1, .h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 6vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
}

h2, .h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h3, .h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.4;
}

@media (max-width: 768px) {
  body { font-size: 16px; }
}

#main-content { scroll-margin-top: 96px; }

/* ---------- 3. 通用容器与布局 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.split {
  display: grid;
  gap: clamp(1.5rem, 3.4vw, 3.25rem);
  align-items: start;
}
.split--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.split--4-8 { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }
.split--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }

.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.75rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 1024px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .split--5-7, .split--4-8, .split--7-5 { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

/* ---------- 4. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.1rem;
  border: 0;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  color: var(--ink);
  background: var(--cyan);
  clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 11px, 100% 100%, 11px 100%, 0 calc(100% - 11px));
  transition: transform var(--speed) var(--ease), background var(--speed) var(--ease), color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--amber { background: var(--amber); }
.btn--amber:hover { background: var(--amber-soft); }
.btn--ghost {
  background: transparent;
  color: var(--ceramic);
  box-shadow: inset 0 0 0 1px rgba(127, 243, 236, 0.45);
}
.btn--ghost:hover {
  color: var(--cyan-soft);
  box-shadow: inset 0 0 0 1px var(--cyan-soft);
}

/* ---------- 5. 页头：紧凑命令栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(8, 19, 31, 0.97) 0%, rgba(8, 19, 31, 0.9) 100%);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 120;
  padding: 0.6rem 1rem;
  background: var(--amber);
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0.5rem; }

.header-shell {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0.55rem var(--gutter);
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--ceramic);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.06rem;
  line-height: 1.2;
  letter-spacing: 0.01em;
}
.brand-mark__glyph {
  width: 14px;
  height: 14px;
  flex: none;
  background: linear-gradient(135deg, var(--cyan), var(--amber));
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
}
.brand-mark__text { transition: color var(--speed) var(--ease); }
.brand-mark:hover .brand-mark__text { color: var(--cyan-soft); }
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--slate);
  white-space: nowrap;
}

.command-bar { min-width: 0; }
.command-list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  gap: 0.1rem;
}
.command-item { flex: none; }
.command-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.5rem 0.62rem;
  text-decoration: none;
  color: rgba(237, 243, 247, 0.7);
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.2;
  transition: color var(--speed) var(--ease), background var(--speed) var(--ease);
}
.command-link::after {
  content: '';
  position: absolute;
  left: 0.62rem;
  right: 0.62rem;
  bottom: 0.24rem;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(37, 224, 212, 0));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--speed) var(--ease), background var(--speed) var(--ease);
}
.command-link:hover { color: var(--ceramic); }
.command-link:hover::after { transform: scaleX(1); }
.command-link[aria-current="page"] { color: var(--ceramic); }
.command-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--amber), rgba(245, 178, 60, 0));
}
.command-index {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--slate);
  transition: color var(--speed) var(--ease);
}
.command-link:hover .command-index { color: var(--cyan); }
.command-link[aria-current="page"] .command-index { color: var(--amber); }
.command-label { white-space: nowrap; }

.header-utility {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.utility-status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--slate);
  white-space: nowrap;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 0 3px rgba(62, 142, 126, 0.22);
}
.utility-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.95rem;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
  background: var(--cyan);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background var(--speed) var(--ease), transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}
.utility-link::after {
  content: '→';
  font-family: var(--font-mono);
  font-size: 0.9em;
}
.utility-link:hover {
  background: var(--cyan-soft);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.7rem;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ceramic);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.nav-toggle__bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: var(--cyan);
  transition: transform var(--speed) var(--ease), opacity var(--speed) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__label { line-height: 1; }

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan-soft) 45%, var(--amber) 100%);
  will-change: transform;
}

@media (max-width: 1180px) {
  .command-index { display: none; }
  .command-link { padding: 0.5rem 0.45rem; }
}

@media (max-width: 1023px) {
  .header-shell {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
  }
  .header-utility { display: none; }
  .nav-toggle { display: inline-flex; }

  .command-bar {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(11, 26, 41, 0.99), rgba(4, 9, 15, 0.99));
    border-bottom: 1px solid var(--line);
    transition: max-height var(--speed) var(--ease);
  }
  .command-bar[data-open] {
    max-height: min(78vh, 540px);
    overflow-y: auto;
  }
  .command-list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 0.6rem var(--gutter) 1.2rem;
  }
  .command-link {
    justify-content: flex-start;
    padding: 0.9rem 0.3rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--line-soft);
  }
  .command-link::after { display: none; }
  .command-index { display: inline; }
  .command-item:last-child .command-link { border-bottom: 0; }
}

@media (max-width: 520px) {
  .brand-sub { display: none; }
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, var(--space-800) 0%, var(--ink) 62%);
  border-top: 1px solid var(--line);
  color: var(--ceramic);
}
.footer-edge {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37, 224, 212, 0.6) 30%, rgba(245, 178, 60, 0.5) 72%, transparent);
}
.footer-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4rem) var(--gutter) 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 0.85fr)) minmax(0, 1.15fr);
  gap: clamp(1.6rem, 3.4vw, 3rem);
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 36ch;
}
.footer-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.footer-note {
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(237, 243, 247, 0.62);
}
.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.35rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  min-width: 0;
}
.footer-col__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--amber);
}
.footer-links { display: grid; gap: 0.45rem; }
.footer-links a {
  position: relative;
  display: inline-block;
  font-size: 0.92rem;
  color: rgba(237, 243, 247, 0.72);
  text-decoration: none;
  transition: color var(--speed) var(--ease), padding-left var(--speed) var(--ease);
}
.footer-links a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: width var(--speed) var(--ease);
}
.footer-links a:hover {
  color: var(--cyan);
  padding-left: 1rem;
}
.footer-links a:hover::before { width: 0.72rem; }

.footer-lines { display: grid; gap: 0.55rem; }
.footer-lines li {
  display: grid;
  grid-template-columns: 4.6rem minmax(0, 1fr);
  gap: 0.5rem;
  font-size: 0.88rem;
  line-height: 1.65;
  color: rgba(237, 243, 247, 0.72);
}
.footer-line__key {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--slate);
  padding-top: 0.18rem;
}
.footer-line__val { word-break: break-word; }
.footer-lines li.footer-line--link { grid-template-columns: 1fr; }
.footer-link-inline {
  display: inline-block;
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--cyan);
  border-bottom: 1px solid rgba(37, 224, 212, 0.4);
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.footer-link-inline:hover {
  color: var(--amber);
  border-color: var(--amber);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
}
.footer-legal {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: rgba(237, 243, 247, 0.6);
}
.footer-copy { font-size: 0.8rem; color: var(--slate); }
.footer-fineprint {
  margin-top: 0.85rem;
  max-width: 78ch;
  font-size: 0.76rem;
  line-height: 1.75;
  color: rgba(92, 110, 126, 0.95);
}

@media (max-width: 1000px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand {
    grid-column: 1 / -1;
    max-width: 56ch;
  }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- 7. 章节头与编辑部隐喻 ---------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.1rem;
  margin-bottom: clamp(1rem, 2.4vw, 1.75rem);
}
.section-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.section-num::after {
  content: '';
  display: inline-block;
  width: 1.6rem;
  height: 1px;
  margin-left: 0.55rem;
  vertical-align: middle;
  background: linear-gradient(90deg, var(--cyan), transparent);
}
.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 2.6vw, 2.1rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
}
.section-note {
  margin-left: auto;
  max-width: 42ch;
  font-size: 0.85rem;
  line-height: 1.75;
  color: rgba(237, 243, 247, 0.6);
}
@media (max-width: 720px) {
  .section-note { margin-left: 0; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.eyebrow::before {
  content: '';
  width: 1.4rem;
  height: 2px;
  background: linear-gradient(90deg, var(--amber), var(--cyan));
}
.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.4vw, 1.14rem);
  line-height: 1.85;
  color: rgba(237, 243, 247, 0.78);
}
.aside-note {
  padding-left: 0.9rem;
  border-left: 2px solid rgba(37, 224, 212, 0.45);
  font-size: 0.85rem;
  line-height: 1.75;
  color: rgba(237, 243, 247, 0.66);
}

.slash-divider {
  position: relative;
  height: 1px;
  margin: clamp(1.75rem, 4vw, 3rem) 0;
  background: linear-gradient(90deg, rgba(37, 224, 212, 0.4), rgba(92, 110, 126, 0.18) 55%, transparent);
}
.slash-divider::after {
  content: '';
  position: absolute;
  left: -6px;
  top: -4px;
  width: 8px;
  height: 8px;
  background: var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

/* ---------- 8. 切角面板 ---------- */
.panel {
  position: relative;
  background: linear-gradient(155deg, rgba(15, 33, 51, 0.92) 0%, rgba(8, 19, 31, 0.86) 100%);
  padding: clamp(1.1rem, 2.2vw, 1.6rem);
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.panel--slim { padding: clamp(0.85rem, 1.6vw, 1.15rem); }
.panel--float {
  box-shadow: inset 0 0 0 1px rgba(127, 243, 236, 0.22), 0 24px 54px -30px rgba(0, 0, 0, 0.95);
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}
.panel--float:hover {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 1px rgba(37, 224, 212, 0.45), 0 30px 64px -32px rgba(0, 0, 0, 0.98);
}
.panel--ink { background: linear-gradient(160deg, rgba(4, 9, 15, 0.96), rgba(11, 26, 41, 0.9)); }
.panel--bare {
  background: none;
  box-shadow: none;
  clip-path: none;
  padding: 0;
}

/* ---------- 9. 指标与标签 ---------- */
.metric { display: grid; gap: 0.25rem; }
.metric__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}
.metric__value--amber { color: var(--amber); }
.metric__value--moss { color: var(--moss-soft); }
.metric__unit {
  margin-left: 0.15em;
  font-size: 0.55em;
  color: var(--slate);
}
.metric__label {
  font-size: 0.82rem;
  line-height: 1.6;
  color: rgba(237, 243, 247, 0.6);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.24rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--cyan);
  background: rgba(37, 224, 212, 0.1);
  box-shadow: inset 0 0 0 1px rgba(37, 224, 212, 0.3);
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}
.tag--amber {
  color: var(--amber);
  background: rgba(245, 178, 60, 0.12);
  box-shadow: inset 0 0 0 1px rgba(245, 178, 60, 0.34);
}
.tag--moss {
  color: var(--moss-soft);
  background: rgba(62, 142, 126, 0.14);
  box-shadow: inset 0 0 0 1px rgba(62, 142, 126, 0.4);
}
.tag--terracotta {
  color: var(--terracotta-soft);
  background: rgba(194, 112, 78, 0.14);
  box-shadow: inset 0 0 0 1px rgba(194, 112, 78, 0.42);
}
.tag--slate {
  color: rgba(237, 243, 247, 0.7);
  background: rgba(92, 110, 126, 0.16);
  box-shadow: inset 0 0 0 1px rgba(92, 110, 126, 0.4);
}

/* ---------- 10. 目录索引 ---------- */
.index-list { display: grid; gap: 0; }
.index-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.85rem 0.35rem;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  color: inherit;
  transition: background var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.index-item:last-child { border-bottom: 0; }
.index-item:hover {
  background: linear-gradient(90deg, rgba(37, 224, 212, 0.09), transparent 70%);
  transform: translateX(4px);
}
.index-item__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--slate);
}
.index-item__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ceramic);
}
.index-item__meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(237, 243, 247, 0.55);
  white-space: nowrap;
}

/* ---------- 11. 数据表 ---------- */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.data-table caption {
  padding-bottom: 0.6rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--slate);
}
.data-table th {
  padding: 0.7rem 0.8rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.data-table td {
  padding: 0.75rem 0.8rem;
  border-bottom: 1px solid var(--line-soft);
  color: rgba(237, 243, 247, 0.8);
  vertical-align: top;
  transition: background var(--speed) var(--ease);
}
.data-table tbody tr { transition: background var(--speed) var(--ease); }
.data-table tbody tr:hover { background: rgba(37, 224, 212, 0.06); }
.data-table td[data-state="ok"] { color: var(--moss-soft); }
.data-table td[data-state="warn"] { color: var(--terracotta-soft); }
.data-table td[data-state="key"] {
  font-family: var(--font-mono);
  color: var(--cyan);
}

.data-table[data-col="0"] tbody td:nth-child(1),
.data-table[data-col="1"] tbody td:nth-child(2),
.data-table[data-col="2"] tbody td:nth-child(3),
.data-table[data-col="3"] tbody td:nth-child(4),
.data-table[data-col="4"] tbody td:nth-child(5),
.data-table[data-col="5"] tbody td:nth-child(6) {
  background: rgba(37, 224, 212, 0.07);
  box-shadow: inset 0 -1px 0 rgba(37, 224, 212, 0.28);
}

@media (max-width: 720px) {
  .data-table thead { display: none; }
  .data-table, .data-table tbody { display: block; }
  .data-table tr {
    display: block;
    margin-bottom: 0.85rem;
    padding: 0.75rem 0.9rem;
    box-shadow: inset 0 0 0 1px var(--line);
    background: rgba(15, 33, 51, 0.6);
  }
  .data-table td {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.35rem 0;
    border-bottom: 0;
  }
  .data-table td::before {
    content: attr(data-label);
    flex: none;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--slate);
  }
}

/* ---------- 12. 可展开内容组 ---------- */
.accordion { display: grid; }
.accordion__item { border-bottom: 1px solid var(--line-soft); }
.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0.2rem;
  background: none;
  border: 0;
  color: var(--ceramic);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color var(--speed) var(--ease);
}
.accordion__trigger:hover { color: var(--cyan); }
.accordion__trigger::after {
  content: '';
  flex: none;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform var(--speed) var(--ease);
}
.accordion__trigger[aria-expanded="true"]::after { transform: rotate(-135deg); }
.accordion__panel {
  display: none;
  padding: 0 0.2rem 1.1rem;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(237, 243, 247, 0.72);
}
.accordion__panel[data-open] { display: block; }

/* ---------- 13. 面包屑 ---------- */
.breadcrumb {
  font-size: 0.82rem;
  color: var(--slate);
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.breadcrumb__list li + li::before {
  content: '/';
  margin-right: 0.4rem;
  color: rgba(92, 110, 126, 0.7);
}
.breadcrumb a {
  color: rgba(237, 243, 247, 0.78);
  text-decoration: none;
  transition: color var(--speed) var(--ease);
}
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__current { color: var(--cyan); }

/* ---------- 14. 图片容器基础 ---------- */
.media-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(37, 224, 212, 0.14) 0%, rgba(8, 19, 31, 0.96) 52%, rgba(245, 178, 60, 0.1) 100%);
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s var(--ease);
}
.media-frame:hover > img { transform: scale(1.045); }
.media-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  background-image:
    linear-gradient(rgba(8, 19, 31, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 19, 31, 0.35) 1px, transparent 1px);
  background-size: 34px 34px;
  mix-blend-mode: overlay;
}
.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 0.7rem 1rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: rgba(237, 243, 247, 0.86);
  background: linear-gradient(0deg, rgba(4, 9, 15, 0.92), rgba(4, 9, 15, 0));
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--portrait { aspect-ratio: 4 / 5; }

/* ---------- 15. 悬浮章节索引 ---------- */
.side-rail {
  position: fixed;
  right: clamp(0.75rem, 2vw, 2rem);
  top: 50%;
  z-index: 70;
  display: none;
  transform: translateY(-50%);
}
.side-rail__list {
  display: grid;
  gap: 0.7rem;
  justify-items: end;
}
.side-rail__link {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.76rem;
  text-decoration: none;
  color: rgba(237, 243, 247, 0.5);
  transition: color var(--speed) var(--ease);
}
.side-rail__link::before {
  content: '';
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: width var(--speed) var(--ease), background var(--speed) var(--ease);
}
.side-rail__link:hover { color: var(--ceramic); }
.side-rail__link[aria-current="true"] { color: var(--cyan); }
.side-rail__link[aria-current="true"]::before {
  width: 30px;
  background: var(--cyan);
}
@media (min-width: 1200px) {
  .side-rail { display: block; }
}

/* ---------- 16. 长文排版 ---------- */
.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1.15em; }
.prose h2 { margin-top: 2.2em; }
.prose h3 {
  margin-top: 1.7em;
  color: var(--ceramic);
}
.prose p { color: rgba(237, 243, 247, 0.82); }
.prose ul { list-style: square; padding-left: 1.3em; }
.prose ol { list-style: decimal; padding-left: 1.4em; }
.prose li { margin-top: 0.5em; }
.prose a {
  color: var(--cyan);
  text-underline-offset: 3px;
}
.prose strong { color: var(--ceramic); font-weight: 700; }

/* ---------- 17. 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 18. 无障碍与减弱动效 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .btn:hover,
  .utility-link:hover,
  .panel--float:hover,
  .index-item:hover,
  .media-frame:hover > img {
    transform: none !important;
  }
}