/* =========================================================
   爱游戏IGAME · 共享站点样式  /assets/site.css
   夜场深绿底色 + 电光青结构光 + 暖橙比分数字
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 18px);
}

body { margin: 0; }

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, pre { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色彩 */
  --ink-900: #07130F;
  --ink-800: #0E2A22;
  --ink-700: #14382E;
  --paper: #F2EDE2;
  --paper-2: #E1D9C9;
  --paper-3: #FBF8F1;
  --cyan: #35E0D0;
  --cyan-soft: #7DEFE3;
  --cyan-deep: #0E6B63;
  --score: #FF9A3C;
  --score-deep: #B4541A;
  --mute-dark: #9FB3AC;
  --mute-paper: #5A6B65;

  --bg: var(--ink-900);
  --fg: var(--paper);

  /* 描边 */
  --line: rgba(53, 224, 208, .20);
  --line-strong: rgba(53, 224, 208, .44);
  --line-soft: rgba(242, 237, 226, .10);
  --line-paper: rgba(14, 42, 34, .16);

  /* 圆角 */
  --r-xs: 8px;
  --r-sm: 12px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;
  --r-pill: 999px;

  /* 尺寸 */
  --w-max: 1280px;
  --gutter: clamp(16px, 4vw, 48px);
  --gap: clamp(16px, 2.2vw, 28px);
  --sp-section: clamp(44px, 7vw, 92px);
  --header-h: 68px;

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
               system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Roboto Mono", "JetBrains Mono",
               Menlo, Consolas, monospace;

  --fs-12: .75rem;
  --fs-13: .8125rem;
  --fs-15: .9375rem;
  --fs-17: 1.0625rem;
  --fs-22: 1.375rem;
  --fs-32: 2rem;
  --fs-48: 3rem;
  --fs-72: 4.5rem;
  --fs-display: clamp(2rem, 5.2vw, 4.5rem);

  --ease: cubic-bezier(.2, .72, .28, 1);
  --shadow-card: 0 22px 54px -30px rgba(0, 0, 0, .9);
}

@media (max-width: 960px) {
  :root { --header-h: 60px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--fs-17);
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.ig-section--paper :focus-visible,
.ig-card--paper :focus-visible {
  outline-color: var(--cyan-deep);
}

/* ---------- 4. 布局容器 ---------- */
.ig-container {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.ig-section {
  position: relative;
  padding-block: var(--sp-section);
}
.ig-section--ink { background: var(--ink-900); color: var(--paper); }
.ig-section--panel { background: var(--ink-800); color: var(--paper); }
.ig-section--paper { background: var(--paper); color: var(--ink-800); }
.ig-section--paper a:not([class]) { color: var(--cyan-deep); }

.ig-split {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  gap: var(--gap);
  align-items: start;
}

.ig-rail {
  position: sticky;
  top: calc(var(--header-h) + 20px);
}

.ig-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.ig-grid--tight { gap: calc(var(--gap) * .62); }

@media (max-width: 900px) {
  .ig-split { grid-template-columns: minmax(0, 1fr); }
  .ig-rail { position: static; }
}

/* ---------- 5. 文字体系 ---------- */
.ig-title {
  margin: 0;
  font-size: var(--fs-display);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -.02em;
  text-wrap: balance;
}
.ig-title--sm { font-size: clamp(1.5rem, 3.2vw, 2.25rem); }

.ig-h2 {
  margin: 0;
  font-size: clamp(1.375rem, 2.4vw, 2rem);
  line-height: 1.24;
  font-weight: 700;
  letter-spacing: -.01em;
}

.ig-h3 {
  margin: 0;
  font-size: var(--fs-22);
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: -.005em;
}

.ig-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .22em;
  color: var(--cyan);
  text-indent: .22em;
}
.ig-eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  flex: none;
}
.ig-section--paper .ig-eyebrow,
.ig-card--paper .ig-eyebrow { color: var(--cyan-deep); }
.ig-section--paper .ig-eyebrow::before,
.ig-card--paper .ig-eyebrow::before { background: var(--cyan-deep); }

.ig-prose {
  max-width: 40em;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: inherit;
}
.ig-prose > * + * { margin-top: 1.05em; }
.ig-prose h3 {
  margin-top: 1.8em;
  font-size: var(--fs-22);
  line-height: 1.4;
  font-weight: 700;
}
.ig-prose ul { display: grid; gap: .5em; }
.ig-prose li {
  position: relative;
  padding-left: 1.15em;
}
.ig-prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--cyan);
}
.ig-section--paper .ig-prose li::before { background: var(--cyan-deep); }
.ig-prose blockquote {
  border-left: 2px solid var(--line-strong);
  padding-left: 1.1em;
  color: var(--mute-dark);
}
.ig-section--paper .ig-prose blockquote {
  border-left-color: var(--line-paper);
  color: var(--mute-paper);
}
.ig-prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }
.ig-section--paper .ig-prose a { color: var(--cyan-deep); }

.ig-link {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color .18s var(--ease);
}
.ig-link:hover { color: var(--cyan-soft); }
.ig-section--paper .ig-link { color: var(--cyan-deep); }
.ig-section--paper .ig-link:hover { color: var(--score-deep); }

/* 等宽数字层 */
.ig-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1;
}
.ig-num--xl { font-size: clamp(2.25rem, 6.4vw, 4.5rem); }
.ig-num--score { color: var(--score); }
.ig-section--paper .ig-num--score,
.ig-card--paper .ig-num--score { color: var(--score-deep); }
.ig-num--overflow { margin-left: -14px; }

/* 章节小注 */
.ig-note {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .24em;
  color: var(--mute-dark);
}
.ig-note--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .32em;
}
.ig-section--paper .ig-note { color: var(--mute-paper); }

/* ---------- 6. 通用组件 ---------- */
.ig-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: var(--fs-13);
  font-weight: 600;
  letter-spacing: .05em;
  white-space: nowrap;
  transition: transform .18s var(--ease), background-color .18s var(--ease),
              color .18s var(--ease), border-color .18s var(--ease);
}
.ig-btn--primary { background: var(--cyan); color: #04211C; }
.ig-btn--primary:hover { background: var(--cyan-soft); transform: translateY(-2px); }
.ig-btn--ghost { border-color: var(--line); color: var(--paper); }
.ig-btn--ghost:hover { background: var(--ink-700); border-color: var(--line-strong); }
.ig-section--paper .ig-btn--ghost {
  border-color: var(--line-paper);
  color: var(--ink-800);
}
.ig-section--paper .ig-btn--ghost:hover { background: var(--paper-2); }
.ig-btn--sm { padding: 8px 14px; font-size: var(--fs-12); }

.ig-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--cyan);
  background: rgba(53, 224, 208, .06);
}
.ig-tag--score {
  color: var(--score);
  border-color: rgba(255, 154, 60, .34);
  background: rgba(255, 154, 60, .08);
  font-family: var(--font-mono);
}
.ig-section--paper .ig-tag { color: var(--cyan-deep); border-color: var(--line-paper); background: rgba(14, 107, 99, .07); }
.ig-section--paper .ig-tag--score { color: var(--score-deep); border-color: rgba(180, 84, 26, .3); background: rgba(180, 84, 26, .07); }

.ig-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.ig-crumb {
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--mute-dark);
}
.ig-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
}
.ig-crumb__list li {
  display: flex;
  align-items: center;
  gap: 9px;
}
.ig-crumb__list li + li::before {
  content: "/";
  color: rgba(159, 179, 172, .5);
}
.ig-crumb__list a { color: var(--mute-dark); transition: color .18s var(--ease); }
.ig-crumb__list a:hover { color: var(--cyan); }
.ig-crumb__list [aria-current="page"] { color: var(--paper); }
.ig-section--paper .ig-crumb,
.ig-section--paper .ig-crumb__list a { color: var(--mute-paper); }
.ig-section--paper .ig-crumb__list [aria-current="page"] { color: var(--ink-800); }

.ig-card {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-800);
  box-shadow: var(--shadow-card);
  transition: transform .22s var(--ease), border-color .22s var(--ease);
}
.ig-card--paper {
  background: var(--paper-3);
  border-color: var(--line-paper);
  color: var(--ink-800);
}
.ig-card--lift:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.ig-rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--line-strong), transparent 82%);
}
.ig-section--paper .ig-rule { background: linear-gradient(90deg, var(--line-paper), transparent 82%); }

/* 章节索引（左侧吸附栏） */
.ig-index {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--line);
}
.ig-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--mute-dark);
  transition: color .18s var(--ease), background-color .18s var(--ease),
              border-color .18s var(--ease);
}
.ig-index__link:hover { color: var(--paper); background: var(--ink-800); }
.ig-index__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(53, 224, 208, .08);
}
.ig-index__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  opacity: .68;
}

/* 图片容器基础规则（供页面阶段放置图片） */
.ig-media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background:
    linear-gradient(150deg, var(--ink-700), var(--ink-900) 72%);
  isolation: isolate;
}
.ig-media--wide { aspect-ratio: 21 / 9; }
.ig-media--tall { aspect-ratio: 3 / 4; }
.ig-media--square { aspect-ratio: 1 / 1; }

.ig-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(53, 224, 208, .10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(53, 224, 208, .10) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: .7;
  pointer-events: none;
}
.ig-media img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.85) contrast(1.06) brightness(.94);
}
.ig-media--glow::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 19, 15, 0) 38%, rgba(7, 19, 15, .78) 100%);
  pointer-events: none;
}
.ig-media__cap {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 2;
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--paper);
}
.ig-media__tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
}

/* 显现动效 */
.ig-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .52s var(--ease), transform .52s var(--ease);
}
.ig-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 7. 头部 ---------- */
.ig-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(7, 19, 15, .9);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  backdrop-filter: saturate(150%) blur(14px);
}

.ig-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 26px);
  width: 100%;
  max-width: var(--w-max);
  height: var(--header-h);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.ig-skip {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 90;
  padding: 10px 18px;
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  background: var(--cyan);
  color: #04211C;
  font-size: var(--fs-13);
  font-weight: 700;
  transition: top .18s var(--ease);
}
.ig-skip:focus { top: 0; }

/* 品牌 */
.ig-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
}
.ig-brand__mark {
  display: inline-grid;
  grid-template-columns: repeat(3, 3px);
  align-items: center;
  justify-content: center;
  gap: 3px;
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: var(--ink-700);
  box-shadow: inset 0 0 0 1px rgba(53, 224, 208, .3);
  flex: none;
}
.ig-brand__mark i {
  display: block;
  width: 3px;
  border-radius: 2px;
  background: var(--cyan);
}
.ig-brand__mark i:nth-child(1) { height: 9px; }
.ig-brand__mark i:nth-child(2) { height: 16px; background: var(--score); }
.ig-brand__mark i:nth-child(3) { height: 12px; }

.ig-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.ig-brand__name {
  font-size: var(--fs-15);
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--paper);
}
.ig-brand__slogan {
  font-size: 10px;
  letter-spacing: .28em;
  color: var(--cyan);
  text-indent: .28em;
}
.ig-brand--lg .ig-brand__mark { width: 38px; height: 38px; border-radius: 13px; grid-template-columns: repeat(3, 4px); gap: 4px; }
.ig-brand--lg .ig-brand__mark i { width: 4px; }
.ig-brand--lg .ig-brand__mark i:nth-child(1) { height: 12px; }
.ig-brand--lg .ig-brand__mark i:nth-child(2) { height: 21px; }
.ig-brand--lg .ig-brand__mark i:nth-child(3) { height: 16px; }
.ig-brand--lg .ig-brand__name { font-size: var(--fs-22); }
.ig-brand--lg .ig-brand__slogan { font-size: var(--fs-12); }

/* 导航 */
.ig-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}
.ig-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.ig-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 11px;
  border-radius: var(--r-pill);
  font-size: var(--fs-13);
  letter-spacing: .03em;
  color: var(--mute-dark);
  transition: color .18s var(--ease), background-color .18s var(--ease),
              box-shadow .18s var(--ease);
}
.ig-nav__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  opacity: .6;
}
.ig-nav__link:hover {
  color: var(--paper);
  background: var(--ink-700);
}
.ig-nav__link:hover .ig-nav__idx { opacity: .9; }
.ig-nav__link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(53, 224, 208, .1);
  box-shadow: inset 0 0 0 1px rgba(53, 224, 208, .38);
}
.ig-nav__link[aria-current="page"] .ig-nav__idx { opacity: 1; color: var(--cyan); }

/* 右侧工具区 */
.ig-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex: none;
}
.ig-tool {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--mute-dark);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.ig-tool:hover { color: var(--cyan); border-color: var(--line-strong); }
.ig-tool__icon { flex: none; }

.ig-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: rgba(53, 224, 208, .07);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--mute-dark);
  white-space: nowrap;
}
.ig-status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(53, 224, 208, .16);
  animation: ig-pulse 2.6s var(--ease) infinite;
  flex: none;
}
@keyframes ig-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

/* 移动端栏目录按钮 */
.ig-nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: var(--fs-12);
  letter-spacing: .12em;
  color: var(--paper);
}
.ig-nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 12px;
}
.ig-nav-toggle__bars i {
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform .22s var(--ease), opacity .22s var(--ease), top .22s var(--ease);
}
.ig-nav-toggle__bars i:nth-child(1) { top: 1px; }
.ig-nav-toggle__bars i:nth-child(2) { top: 9px; }
.ig-nav-toggle[aria-expanded="true"] { border-color: var(--line-strong); color: var(--cyan); }
.ig-nav-toggle[aria-expanded="true"] .ig-nav-toggle__bars i:nth-child(1) { top: 5px; transform: rotate(45deg); }
.ig-nav-toggle[aria-expanded="true"] .ig-nav-toggle__bars i:nth-child(2) { top: 5px; transform: rotate(-45deg); }

/* 阅读进度 */
.ig-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(53, 224, 208, .1);
  overflow: hidden;
}
.ig-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), rgba(53, 224, 208, .35));
  transition: transform .12s linear;
}

/* ---------- 8. 页脚 ---------- */
.ig-footer {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  border-top: 1px solid var(--line);
  color: var(--paper);
}
.ig-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(242, 237, 226, .045) 1px, transparent 1px);
  background-size: 88px 100%;
  pointer-events: none;
}
.ig-footer__contour {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 78% at 10% 0%, rgba(53, 224, 208, .12), transparent 58%),
    radial-gradient(90% 62% at 100% 108%, rgba(255, 154, 60, .08), transparent 62%),
    radial-gradient(60% 40% at 60% 40%, rgba(20, 56, 46, .55), transparent 70%);
}
.ig-footer__inner {
  position: relative;
  z-index: 2;
  padding-block: clamp(38px, 6vw, 72px) 0;
}

.ig-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, minmax(0, 1fr));
  gap: var(--gap);
  padding-bottom: clamp(28px, 4vw, 48px);
}
.ig-footer__brand { max-width: 22em; }
.ig-footer__blurb {
  margin-top: 16px;
  font-size: var(--fs-13);
  line-height: 1.9;
  color: var(--mute-dark);
}
.ig-footer__hours {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--cyan);
}

.ig-footer__title {
  margin: 0 0 14px;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: .26em;
  color: var(--paper);
  text-indent: .26em;
}
.ig-footer__list { display: grid; gap: 9px; }
.ig-footer__link {
  display: inline-block;
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--mute-dark);
  transition: color .18s var(--ease), transform .18s var(--ease);
}
.ig-footer__link:hover { color: var(--cyan); transform: translateX(4px); }
.ig-footer__link[aria-current="page"] { color: var(--cyan); }

.ig-footer__strip {
  display: grid;
  gap: 8px;
  padding-block: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-soft);
}
.ig-footer__line {
  font-size: var(--fs-13);
  letter-spacing: .03em;
  color: var(--mute-dark);
}
.ig-footer__k {
  display: inline-block;
  min-width: 3.4em;
  margin-right: 8px;
  color: var(--cyan-deep);
  color: var(--cyan);
  letter-spacing: .18em;
  font-size: var(--fs-12);
}
.ig-footer__note {
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: rgba(159, 179, 172, .78);
}

.ig-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  padding-block: 18px 22px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--mute-dark);
}
.ig-footer__icp {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--mute-dark);
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1180px) {
  .ig-status { display: none; }
}

@media (max-width: 1020px) {
  .ig-tool__label { display: none; }
  .ig-tool { padding: 8px 10px; }
}

@media (max-width: 960px) {
  .ig-nav-toggle { display: inline-flex; }

  .ig-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 79;
    flex-direction: column;
    justify-content: flex-start;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 14px var(--gutter) 24px;
    background: var(--ink-800);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s var(--ease);
  }
  .ig-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .ig-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    width: 100%;
  }
  .ig-nav__link {
    justify-content: flex-start;
    padding: 13px 16px;
    border-radius: var(--r-md);
    font-size: var(--fs-15);
  }
  .ig-nav__link[aria-current="page"] { box-shadow: inset 0 0 0 1px rgba(53, 224, 208, .45); }

  .ig-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px var(--gap);
  }
  .ig-footer__brand { grid-column: 1 / -1; max-width: none; }
}

@media (max-width: 620px) {
  .ig-tools__cta { display: none; }
}

@media (max-width: 480px) {
  .ig-brand__slogan { display: none; }
  .ig-brand__name { font-size: var(--fs-13); }
  .ig-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .ig-footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 10. 可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .ig-js [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .ig-progress__bar { transition: none; }
}