/* ============================================================
   十八游戏站 · 共享样式表
   文件路径：/assets/site.css
   设计基调：高原档案室 × 数字游乐场
   说明：本文件只负责 reset、设计变量、中文排版、共享头部与
        页脚、通用按钮、面包屑、容器、网格与基础组件。
        页面专属版式由后续页面 CSS 叠加。
   ============================================================ */

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

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

html.nav-open,
html.nav-open body { overflow: hidden; }

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd { margin: 0; }

ul, ol { margin: 0; padding: 0; }
ul[class],
ol[class] { list-style: none; }

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

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

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

a { color: inherit; }

#main-content { display: block; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色板 */
  --ink: #071A22;
  --lake: #0B4F6C;
  --lake-bright: #1D7A9E;
  --moss: #162C33;
  --cyan: #35F2D0;
  --terracotta: #E26D3F;
  --sand: #E8D3A9;
  --card: #F7F3EA;
  --mist: #8BB8C4;
  --sand-mute: #B9A98D;

  --line: rgba(139, 184, 196, 0.22);
  --line-strong: rgba(53, 242, 208, 0.36);
  --line-dashed: rgba(139, 184, 196, 0.40);
  --cyan-ink: #04252A;
  --terracotta-ink: #1A0E08;

  /* 字体 */
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "Source Han Sans CN", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* 字号阶梯 */
  --step--1: clamp(0.78rem, 0.75rem + 0.16vw, 0.88rem);
  --step-0: clamp(0.98rem, 0.95rem + 0.22vw, 1.10rem);
  --step-1: clamp(1.20rem, 1.05rem + 0.70vw, 1.55rem);
  --step-2: clamp(1.55rem, 1.25rem + 1.50vw, 2.35rem);
  --step-3: clamp(2.05rem, 1.50rem + 2.80vw, 3.50rem);
  --step-4: clamp(2.60rem, 1.50rem + 5.20vw, 5.60rem);
  --step-display: clamp(2.90rem, 1.00rem + 8.60vw, 8.00rem);

  /* 空间 */
  --gutter: clamp(1.15rem, 4vw, 4.25rem);
  --maxw: 1240px;
  --header-h: 4.5rem;

  /* 形状 */
  --radius-s: 10px;
  --radius-m: 18px;
  --radius-l: 32px;
  --shadow-lift: 0 30px 60px -34px rgba(0, 0, 0, 0.85);

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.7, 0.28, 1);
  --dur: 0.4s;
}

/* ---------- 3. 中文排版与页面底色 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--card);
  background-color: var(--ink);
  background-image:
    radial-gradient(1200px 700px at 88% -10%, rgba(29, 122, 158, 0.42) 0%, rgba(29, 122, 158, 0) 62%),
    radial-gradient(900px 600px at -12% 8%, rgba(11, 79, 108, 0.62) 0%, rgba(11, 79, 108, 0) 68%),
    radial-gradient(820px 520px at 60% 104%, rgba(226, 109, 63, 0.10) 0%, rgba(226, 109, 63, 0) 72%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}

h1, h2, h3, h4 {
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--card);
}

h1 { font-size: var(--step-3); }
h2 { font-size: var(--step-2); }
h3 { font-size: var(--step-1); }
h4 {
  font-size: var(--step-0);
  font-weight: 700;
  letter-spacing: -0.005em;
}

strong { font-weight: 700; color: var(--sand); }

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

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 4. 工具类与布局 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.container {
  width: min(calc(100% - var(--gutter) * 2), var(--maxw));
  margin-inline: auto;
}

.container-narrow {
  width: min(calc(100% - var(--gutter) * 2), 760px);
  margin-inline: auto;
}

.section {
  padding-block: clamp(3rem, 7vw, 6rem);
}

.stack {
  display: grid;
  gap: clamp(0.75rem, 1.6vw, 1.25rem);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 2rem);
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
}

.grid-aside {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

@media (min-width: 900px) {
  .grid-aside {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: clamp(1.75rem, 4vw, 3.75rem);
  }
}

.divider {
  height: 1px;
  border: 0;
  margin-block: clamp(1.5rem, 4vw, 2.75rem);
  background: var(--line);
}

.prose { max-width: 68ch; }
.prose p + p { margin-top: 1.1em; }
.prose h2 { margin-top: 1.8em; margin-bottom: 0.6em; }
.prose h3 { margin-top: 1.5em; margin-bottom: 0.5em; }
.prose ul,
.prose ol { margin-top: 0.9em; padding-inline-start: 1.25rem; }
.prose li + li { margin-top: 0.4em; }
.prose a {
  color: var(--sand);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--cyan); }

/* ---------- 5. 标签 / 徽章 / 卡片 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.70rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.62rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(22, 44, 51, 0.68);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.card {
  position: relative;
  padding: clamp(1.1rem, 2.4vw, 1.9rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background-image:
    linear-gradient(160deg, rgba(22, 44, 51, 0.94) 0%, rgba(11, 79, 108, 0.55) 100%);
  box-shadow: var(--shadow-lift);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.62rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--cta {
  background: var(--terracotta);
  color: var(--terracotta-ink);
}
.btn--cta:hover { background: #EF8256; }

.btn--ghost {
  background: transparent;
  border-color: rgba(232, 211, 169, 0.42);
  color: var(--sand);
}
.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--cyan {
  background: var(--cyan);
  color: var(--cyan-ink);
}
.btn--cyan:hover { background: #6BF7DE; }

/* ---------- 7. 面包屑 ---------- */
.breadcrumb {
  width: min(calc(100% - var(--gutter) * 2), var(--maxw));
  margin-inline: auto;
  padding-block: 1rem 0;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.70rem;
  letter-spacing: 0.08em;
  color: var(--sand-mute);
}

.breadcrumb-list li { display: inline-flex; align-items: center; gap: 0.45rem; }
.breadcrumb-list li + li::before {
  content: "/";
  color: var(--line-dashed);
}

.breadcrumb-list a {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.breadcrumb-list a:hover { color: var(--cyan); }

/* ---------- 8. 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  isolation: isolate;
  border-radius: var(--radius-m);
  background-color: var(--lake);
  background-image:
    linear-gradient(140deg, var(--lake) 0%, var(--lake-bright) 54%, var(--moss) 100%);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(120% 90% at 10% 0%, rgba(53, 242, 208, 0.20) 0%, rgba(53, 242, 208, 0) 62%),
    radial-gradient(90% 80% at 100% 100%, rgba(226, 109, 63, 0.24) 0%, rgba(226, 109, 63, 0) 66%);
}

.media > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 16 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--screen {
  aspect-ratio: 9 / 19;
  border-radius: var(--radius-l);
}

.media-caption {
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.70rem;
  letter-spacing: 0.06em;
  color: var(--sand-mute);
}

/* ---------- 9. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0.7rem;
  left: 0.7rem;
  z-index: 200;
  padding: 0.72rem 1.2rem;
  border-radius: var(--radius-s);
  background: var(--cyan);
  color: var(--cyan-ink);
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
  transform: translateY(-220%);
  transition: transform 0.25s var(--ease);
}

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

/* ---------- 10. 共享头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 90;
  color: var(--card);
  background-color: transparent;
  background-image:
    linear-gradient(180deg, rgba(7, 26, 34, 0.88) 0%, rgba(7, 26, 34, 0.42) 58%, rgba(7, 26, 34, 0) 100%);
  border-bottom: 1px solid transparent;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.site-header[data-state="solid"] {
  background-color: var(--moss);
  background-image: none;
  border-bottom-color: var(--line-strong);
  box-shadow: 0 20px 44px -34px rgba(0, 0, 0, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 1.6vw, 1.75rem);
  width: min(calc(100% - var(--gutter) * 2), var(--maxw));
  min-height: var(--header-h);
  margin-inline: auto;
}

/* 品牌 */
.brand {
  order: 1;
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  position: relative;
  z-index: 2;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--card);
}

.brand-mark {
  font-size: clamp(1.12rem, 1rem + 0.6vw, 1.42rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
}

.brand-edition {
  padding: 0.15rem 0.5rem;
  border: 1px solid rgba(53, 242, 208, 0.42);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  white-space: nowrap;
}

.brand--footer {
  display: inline-flex;
  margin-bottom: 0.9rem;
  color: var(--card);
}

/* 更新状态 */
.header-status {
  order: 2;
  display: none;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--sand-mute);
  white-space: nowrap;
}

.status-dot {
  display: inline-block;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(53, 242, 208, 0.18);
}

@media (min-width: 1180px) {
  .header-status { display: inline-flex; }
}

/* 汉堡按钮 */
.nav-toggle {
  order: 5;
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-inline-start: auto;
  border: 1px solid rgba(139, 184, 196, 0.34);
  border-radius: 12px;
  background: rgba(232, 211, 169, 0.07);
  color: var(--sand);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color 0.25s var(--ease);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.3s var(--ease);
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* 主导航 —— 移动端为全屏索引卡 */
.site-nav {
  order: 4;
  position: fixed;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0;
  padding: calc(var(--header-h) + 1.5rem) var(--gutter) 2rem;
  background-color: var(--ink);
  background-image:
    radial-gradient(760px 520px at 88% 6%, rgba(29, 122, 158, 0.55) 0%, rgba(29, 122, 158, 0) 66%),
    radial-gradient(620px 460px at 0% 96%, rgba(11, 79, 108, 0.65) 0%, rgba(11, 79, 108, 0) 70%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-10px);
  transition:
    opacity 0.35s var(--ease),
    transform 0.35s var(--ease),
    visibility 0.35s var(--ease);
}

.site-nav[data-open="true"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  width: 100%;
  padding: 0.72rem 0;
  border-bottom: 1px solid var(--line);
  font-size: clamp(1.3rem, 1.1rem + 2.6vw, 1.95rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--card);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--cyan); }

.nav-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--sand-mute);
  transition: color var(--dur) var(--ease);
}

.nav-link:hover .nav-index,
.nav-link:focus-visible .nav-index { color: var(--cyan); }

.nav-link[aria-current="page"] { color: var(--cyan); }
.nav-link[aria-current="page"] .nav-index { color: var(--cyan); }

/* 头部 CTA */
.header-cta {
  order: 3;
  position: relative;
  z-index: 2;
  display: none;
  flex-shrink: 0;
}

@media (min-width: 720px) {
  .header-cta { display: inline-flex; }
}

/* 阅读进度线 */
.header-progress {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background-image: linear-gradient(90deg, var(--cyan) 0%, var(--terracotta) 100%);
  transition: opacity 0.3s var(--ease);
  opacity: 0.9;
}

/* 桌面端导航横排 */
@media (min-width: 960px) {
  .nav-toggle { display: none; }

  .site-nav {
    order: 3;
    position: static;
    inset: auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: clamp(0.2rem, 0.8vw, 0.9rem);
    margin-inline-start: auto;
    padding: 0;
    background: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition: none;
  }

  .nav-link {
    width: auto;
    padding: 0.55rem 0.3rem;
    border-bottom: 0;
    font-size: 0.92rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    color: var(--mist);
  }

  .nav-link::after {
    content: "";
    position: absolute;
    right: 0.3rem;
    bottom: 0.15rem;
    left: 0.3rem;
    height: 2px;
    background: var(--cyan);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.3s var(--ease);
  }

  .nav-link:hover::after,
  .nav-link:focus-visible::after,
  .nav-link[aria-current="page"]::after { transform: scaleX(1); }

  .nav-link:hover,
  .nav-link:focus-visible,
  .nav-link[aria-current="page"] { color: var(--card); }

  .nav-link[aria-current="page"] .nav-index { color: var(--cyan); }

  .nav-index { font-size: 0.62rem; }

  .header-cta { order: 4; }
}

/* ---------- 11. 共享页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 9vw, 8rem);
  border-top: 1px solid var(--line);
  color: var(--card);
  background-color: var(--ink);
  background-image:
    radial-gradient(1000px 480px at 8% 0%, rgba(11, 79, 108, 0.62) 0%, rgba(11, 79, 108, 0) 68%),
    radial-gradient(720px 420px at 96% 14%, rgba(226, 109, 63, 0.16) 0%, rgba(226, 109, 63, 0) 70%);
  background-repeat: no-repeat;
}

/* 固定反馈胶囊 */
.feedback-fab {
  position: fixed;
  right: clamp(0.9rem, 3.5vw, 1.6rem);
  bottom: clamp(0.9rem, 3.5vw, 1.6rem);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.05rem;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--cyan-ink);
  font-size: 0.80rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
  box-shadow: 0 16px 32px -16px rgba(53, 242, 208, 0.70);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.feedback-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 38px -16px rgba(53, 242, 208, 0.85);
}

.feedback-fab-dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--terracotta);
  box-shadow: 0 0 0 3px rgba(226, 109, 63, 0.30);
}

/* 反馈带 */
.feedback-band {
  display: grid;
  gap: clamp(1.15rem, 3vw, 2rem);
  width: min(calc(100% - var(--gutter) * 2), var(--maxw));
  margin-inline: auto;
  padding-block: clamp(2.2rem, 5vw, 3.6rem);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 900px) {
  .feedback-band {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr) auto;
    align-items: center;
  }
}

.feedback-head {
  display: grid;
  gap: 0.5rem;
  min-width: 0;
}

.feedback-kicker {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.feedback-title {
  font-size: clamp(1.35rem, 1.1rem + 1.2vw, 2rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--card);
}

.feedback-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.feedback-tags li {
  padding: 0.36rem 0.78rem;
  border: 1px dashed var(--line-dashed);
  border-radius: 999px;
  background: rgba(22, 44, 51, 0.52);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--mist);
}

.feedback-action { justify-self: start; }

@media (min-width: 900px) {
  .feedback-action { justify-self: end; }
}

/* 页脚主体 */
.footer-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 2.75rem);
  width: min(calc(100% - var(--gutter) * 2), var(--maxw));
  margin-inline: auto;
  padding-block: clamp(2.2rem, 5vw, 3.6rem);
}

@media (min-width: 700px) {
  .footer-body { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .footer-body {
    grid-template-columns: 1.3fr 0.85fr 1.15fr;
    gap: clamp(2rem, 4vw, 4rem);
  }
  .footer-brand { grid-column: auto; }
}

.footer-region {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  line-height: 1.9;
  color: var(--sand-mute);
  max-width: 32ch;
}

.footer-col-title {
  margin-bottom: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-nav,
.footer-meta { min-width: 0; }

.footer-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-list a {
  font-size: 0.92rem;
  color: var(--sand);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.footer-list a:hover,
.footer-list a:focus-visible { color: var(--cyan); }

.footer-list--inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.15rem;
  margin-top: 1.1rem;
}

.footer-list--inline a { font-size: 0.82rem; }

.footer-contact {
  display: grid;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.80rem;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--card);
}

.footer-note {
  margin-top: 0.95rem;
  max-width: 36ch;
  font-size: 0.76rem;
  line-height: 1.8;
  color: var(--sand-mute);
}

/* 底栏 */
.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem 1.75rem;
  width: min(calc(100% - var(--gutter) * 2), var(--maxw));
  margin-inline: auto;
  padding-block: 1.35rem 2.4rem;
  border-top: 1px solid var(--line);
  font-size: 0.74rem;
  color: var(--sand-mute);
}

.footer-copy { max-width: none; }

.footer-icp {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  max-width: none;
}

.footer-region-note { max-width: none; }

/* ---------- 12. 滚动显现 ---------- */
[data-reveal] {
  transition:
    opacity 0.7s var(--ease),
    transform 0.7s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal-pending {
  opacity: 0;
  transform: translateY(20px);
}

.is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 13. reduced-motion ---------- */
@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;
  }

  [data-reveal],
  .reveal-pending {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .btn:hover,
  .feedback-fab:hover { transform: none; }
}

/* ---------- 14. 窄屏补丁 ---------- */
@media (max-width: 380px) {
  .brand-edition { display: none; }
  .feedback-fab { font-size: 0.74rem; padding: 0.55rem 0.9rem; }
}