/* ==========================================================================
   哈狗游戏官网 · 共享样式表  /assets/site.css
   赛博朋克棋牌酒馆：深空底 + 棋盘网格 + 霓虹橙单点强调
   ========================================================================== */

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

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

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

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

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

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

a { color: inherit; }

table { border-collapse: collapse; width: 100%; }

hr { border: 0; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色彩 */
  --c-void:   #05070F;
  --c-ink:    #0B1020;
  --c-panel:  #141A33;
  --c-line:   #1E2748;
  --c-mist:   #6E7BA8;
  --c-moon:   #C9D2EE;
  --c-white:  #FFFFFF;
  --c-orange: #FF7A1A;
  --c-amber:  #FFC46B;
  --c-violet: #7B5CFF;
  --c-green:  #35F2A0;
  --c-rose:   #FF4D6D;

  /* 字体族 */
  --font-display: 'Noto Sans SC Black', 'HarmonyOS Sans SC', 'PingFang SC', system-ui, sans-serif;
  --font-serif:   'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', Georgia, serif;
  --font-body:    'Noto Sans SC', 'PingFang SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* 尺度 */
  --shell: 1140px;
  --gutter: clamp(16px, 4vw, 32px);
  --gap: clamp(16px, 2.4vw, 28px);
  --sect: clamp(52px, 8.5vw, 108px);
  --radius-s: 4px;
  --radius-m: 14px;
  --radius-pill: 999px;
  --cut-s: 12px;
  --cut-l: 24px;
  --header-h: 62px;

  /* 动效 */
  --t-fast: 180ms;
  --t-mid: 320ms;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 页面基底与中文排版 ---------- */
body {
  min-height: 100vh;
  padding-top: calc(var(--header-h) + 34px);
  background-color: var(--c-void);
  background-image:
    radial-gradient(820px 540px at 10% -8%, rgba(123, 92, 255, .20), transparent 68%),
    radial-gradient(760px 480px at 92% 1%, rgba(255, 122, 26, .16), transparent 70%),
    repeating-linear-gradient(0deg, rgba(30, 39, 72, .55) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(30, 39, 72, .55) 0 1px, transparent 1px 24px);
  color: var(--c-moon);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--c-white);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0;
}

strong, b { color: var(--c-white); font-weight: 700; }

a { text-decoration: none; }

#main-content { display: block; }

/* ---------- 4. 焦点与可访问 ---------- */
:focus-visible {
  outline: 2px solid var(--c-violet);
  outline-offset: 2px;
  box-shadow: 0 0 0 2px var(--c-void);
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 120;
  padding: 10px 20px;
  background: var(--c-orange);
  color: var(--c-void);
  font-weight: 700;
  border-radius: 0 0 var(--radius-pill) var(--radius-pill);
  transition: top var(--t-fast) var(--ease);
}

.skip-link:focus { top: 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- 5. 布局容器与网格 ---------- */
.shell {
  width: min(var(--shell), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.section { padding-block: var(--sect); }
.section--tight { padding-block: calc(var(--sect) * .5); }

.section--ink {
  background: linear-gradient(180deg, rgba(11, 16, 32, .92), rgba(11, 16, 32, .28));
  border-block: 1px solid rgba(30, 39, 72, .7);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.grid { display: grid; gap: var(--gap); }
.grid-2 { display: grid; gap: var(--gap); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { display: grid; gap: var(--gap); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { display: grid; gap: var(--gap); grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-12 { display: grid; gap: var(--gap); grid-template-columns: repeat(12, minmax(0, 1fr)); }

.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-5  { grid-column: span 5; }
.col-6  { grid-column: span 6; }
.col-7  { grid-column: span 7; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-12 { grid-column: span 12; }

@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-7, .col-8, .col-9 { grid-column: span 6; }
}

@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); }
  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-12 { grid-column: span 1; }
}

/* ---------- 6. 文字阶梯 ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.03em;
  line-height: 1.02;
  color: var(--c-white);
  text-shadow: 0 0 1px rgba(255, 122, 26, .9), 0 0 26px rgba(255, 122, 26, .22);
}

.t-96 { font-size: clamp(44px, 8vw, 96px); }
.t-64 { font-size: clamp(34px, 5.4vw, 64px); }
.t-40 { font-size: clamp(26px, 3.4vw, 40px); }
.t-32 { font-size: clamp(23px, 2.6vw, 32px); }
.t-26 { font-size: clamp(20px, 2vw, 26px); }
.t-20 { font-size: 20px; }

.serif-title {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.3;
  color: var(--c-white);
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.25;
  color: var(--c-white);
}

.section-lede { max-width: 68ch; color: var(--c-mist); }

.lede {
  max-width: 68ch;
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.8;
  color: var(--c-moon);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.eyebrow::before {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  background: var(--c-orange);
}

.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: .02em;
  font-size: .92em;
}

.muted { color: var(--c-mist); }

/* ---------- 7. 正文长文容器 ---------- */
.prose { max-width: 70ch; }

.prose p {
  max-width: 68ch;
  margin-bottom: 1.15em;
  line-height: 1.85;
}

.prose h2 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 2.6vw, 32px);
  margin: 1.7em 0 .6em;
}

.prose h3 {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2vw, 26px);
  margin: 1.4em 0 .5em;
}

.prose ul,
.prose ol {
  display: flex;
  flex-direction: column;
  gap: .45em;
  margin-bottom: 1.15em;
  padding-left: 1.35em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.prose a {
  color: var(--c-amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose blockquote {
  border-left: 2px solid var(--c-orange);
  padding-left: 18px;
  color: var(--c-mist);
  font-family: var(--font-serif);
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .02em;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
}

.btn-primary {
  background: linear-gradient(135deg, var(--c-orange), var(--c-amber));
  color: var(--c-void);
  box-shadow: 0 0 0 1px rgba(255, 122, 26, .45), 0 10px 26px -12px rgba(255, 122, 26, .95);
}

.btn-primary:hover {
  box-shadow: 0 0 0 1px rgba(255, 196, 107, .8), 0 14px 32px -12px rgba(255, 122, 26, 1);
}

.btn-ghost {
  background: rgba(20, 26, 51, .72);
  border-color: var(--c-line);
  color: var(--c-moon);
}

.btn-ghost:hover {
  border-color: var(--c-orange);
  color: var(--c-white);
}

/* ---------- 9. 标签与状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  background: rgba(20, 26, 51, .7);
  color: var(--c-mist);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .1em;
  line-height: 1.6;
}

.tag--violet { color: #CFC6FF; border-color: rgba(123, 92, 255, .55); background: rgba(123, 92, 255, .14); }
.tag--orange { color: var(--c-amber); border-color: rgba(255, 122, 26, .55); background: rgba(255, 122, 26, .14); }
.tag--green  { color: var(--c-green); border-color: rgba(53, 242, 160, .45); background: rgba(53, 242, 160, .12); }
.tag--rose   { color: var(--c-rose);  border-color: rgba(255, 77, 109, .45); background: rgba(255, 77, 109, .12); }

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 10px rgba(53, 242, 160, .85);
}

/* ---------- 10. 面板、卡片与切角 ---------- */
.cut-s {
  clip-path: polygon(var(--cut-s) 0, 100% 0, 100% calc(100% - var(--cut-s)), calc(100% - var(--cut-s)) 100%, 0 100%, 0 var(--cut-s));
}

.cut-l {
  clip-path: polygon(var(--cut-l) 0, 100% 0, 100% calc(100% - var(--cut-l)), calc(100% - var(--cut-l)) 100%, 0 100%, 0 var(--cut-l));
}

.panel {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-s);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-s);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.card:hover,
.card:focus-within {
  border-color: var(--c-orange);
  background: #171E3C;
}

.card--link { color: inherit; }

.card__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.4;
}

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

.card__body { color: var(--c-moon); }

.stat { display: flex; flex-direction: column; gap: 2px; }

.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 500;
  letter-spacing: .02em;
  line-height: 1.2;
  color: var(--c-amber);
}

.stat-label { font-size: 13px; color: var(--c-mist); }

.rule { height: 1px; background: var(--c-line); }

/* 时间线轨道 */
.track {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-left: 24px;
  border-left: 1px solid var(--c-line);
}

.track-item { position: relative; }

.track-item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: .75em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-ink);
  border: 2px solid var(--c-orange);
  box-shadow: 0 0 10px rgba(255, 122, 26, .7);
}

.track-time {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-mist);
}

/* ---------- 11. 图片容器（页面阶段放占位图） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-s);
  background: linear-gradient(140deg, #141A33 0%, #0B1020 58%, #05070F 100%);
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 7, 15, 0) 42%, rgba(5, 7, 15, .74) 100%);
}

.media-frame[data-plain]::after { display: none; }

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--poster { aspect-ratio: 2 / 3; }

.media-frame__cap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 1;
  padding: 4px 10px;
  border: 1px solid rgba(30, 39, 72, .9);
  border-radius: var(--radius-pill);
  background: rgba(5, 7, 15, .78);
  color: var(--c-mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}

@media (max-width: 620px) {
  .media-frame { aspect-ratio: 4 / 3; }
  .media-frame--wide { aspect-ratio: 16 / 9; }
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-mist);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-line);
}

.breadcrumbs a { color: var(--c-mist); transition: color var(--t-fast) var(--ease); }
.breadcrumbs a:hover { color: var(--c-orange); }
.breadcrumbs [aria-current="page"] { color: var(--c-moon); }

/* ---------- 13. 顶部阅读进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 110;
  background: rgba(30, 39, 72, .55);
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-violet), var(--c-orange) 55%, var(--c-amber));
  box-shadow: 0 0 12px rgba(255, 122, 26, .85);
  transition: width 100ms linear;
}

/* ---------- 14. 悬浮胶囊导航 ---------- */
.site-header {
  position: fixed;
  top: 12px;
  left: 0;
  right: 0;
  z-index: 100;
  pointer-events: none;
}

.header-inner {
  position: relative;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(var(--shell), calc(100% - 24px));
  margin-inline: auto;
  padding: 10px 14px 10px 16px;
  background: rgba(11, 16, 32, .80);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  transition: padding var(--t-mid) var(--ease),
              background var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease);
}

.site-header[data-compact] .header-inner {
  padding: 7px 12px 7px 14px;
  background: rgba(5, 7, 15, .92);
  box-shadow: 0 18px 44px -28px rgba(0, 0, 0, .95);
}

.site-header[data-compact] .brand-tag { display: none; }

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--c-moon);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--c-orange), var(--c-violet));
  color: var(--c-void);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  box-shadow: 0 0 18px rgba(255, 122, 26, .45);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }

.brand-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: .02em;
  color: var(--c-white);
}

.brand-tag {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-mist);
}

/* 导航主体 */
.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--c-mist);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.nav-link:hover {
  color: var(--c-moon);
  background: rgba(30, 39, 72, .72);
}

.nav-link[aria-current="page"] {
  color: var(--c-void);
  background: var(--c-orange);
  box-shadow: 0 0 16px rgba(255, 122, 26, .5);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 6px;
}

.nav-actions .btn {
  padding: 9px 14px;
  font-size: 13px;
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 14px;
  background: rgba(30, 39, 72, .72);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  color: var(--c-moon);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.nav-toggle:hover { border-color: var(--c-orange); color: var(--c-white); }

.nav-toggle-bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: currentColor;
}

@media (max-width: 1079px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    margin-left: 0;
    padding: 16px;
    background: rgba(11, 16, 32, .97);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border: 1px solid var(--c-line);
    border-radius: 22px;
    box-shadow: 0 30px 70px -34px rgba(0, 0, 0, 1);
  }

  .site-nav[data-open] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    padding: 12px 14px;
    border-radius: 12px;
    background: rgba(20, 26, 51, .55);
    font-size: 15px;
  }

  .nav-link[aria-current="page"] { background: var(--c-orange); }

  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    margin-left: 0;
  }

  .nav-actions .btn {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
  }
}

@media (max-width: 560px) {
  .brand-tag { display: none; }
  .brand-mark { width: 32px; height: 32px; font-size: 16px; }
}

/* ---------- 15. 侧边快捷轨道 ---------- */
.quick-rail {
  position: fixed;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 95;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quick-rail-link {
  writing-mode: vertical-rl;
  padding: 14px 8px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  background: rgba(20, 26, 51, .82);
  color: var(--c-mist);
  font-size: 12px;
  letter-spacing: .2em;
  line-height: 1;
  transition: color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.quick-rail-link:hover {
  color: var(--c-void);
  background: var(--c-orange);
  border-color: var(--c-orange);
}

@media (max-width: 1279px) {
  .quick-rail {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    transform: none;
    flex-direction: row;
    justify-content: center;
    gap: 8px;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px));
    background: linear-gradient(180deg, rgba(5, 7, 15, .55), rgba(5, 7, 15, .97));
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--c-line);
  }

  .quick-rail-link {
    writing-mode: horizontal-tb;
    padding: 8px 16px;
    font-size: 13px;
    letter-spacing: .06em;
  }

  body { padding-bottom: 78px; }
}

/* ---------- 16. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(40px, 6vw, 64px) 0 26px;
  background: linear-gradient(180deg, var(--c-ink) 0%, var(--c-void) 72%);
  border-top: 1px solid var(--c-line);
  overflow: hidden;
}

/* 陕西意象彩蛋：城墙砖纹 */
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .06;
  background-image:
    repeating-linear-gradient(0deg, #C9D2EE 0 1px, transparent 1px 22px),
    repeating-linear-gradient(90deg, #C9D2EE 0 1px, transparent 1px 44px);
}

/* 陕西意象彩蛋：钟楼盘面纹样 */
.site-footer::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -110px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  pointer-events: none;
  opacity: .06;
  background: repeating-conic-gradient(from 0deg, #C9D2EE 0deg 5deg, transparent 5deg 15deg);
}

.footer-inner { position: relative; z-index: 1; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, minmax(0, .9fr)) 1.4fr;
  gap: clamp(24px, 3vw, 40px);
  padding-bottom: 34px;
}

.footer-brand { display: flex; flex-direction: column; gap: 12px; }

.footer-brand-line {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-moon);
}

.footer-note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-mist);
}

.footer-col { display: flex; flex-direction: column; gap: 14px; }

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.footer-links { display: flex; flex-direction: column; gap: 9px; }

.footer-link {
  font-size: 14px;
  color: var(--c-mist);
  transition: color var(--t-fast) var(--ease);
}

.footer-link:hover { color: var(--c-amber); }

.footer-contact-list { display: flex; flex-direction: column; gap: 12px; }

.footer-contact-item { display: flex; flex-direction: column; gap: 2px; }

.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-mist);
}

.footer-contact-value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-moon);
  word-break: break-word;
}

.footer-legal-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 22px;
  border-top: 1px solid var(--c-line);
}

.footer-legal {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: span 2; }
}

@media (max-width: 620px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-brand { grid-column: span 1; }
  .footer-legal-bar { flex-direction: column; align-items: flex-start; }
}

/* ---------- 17. 标签页 / 筛选（页面阶段使用） ---------- */
.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.tab {
  padding: 9px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  background: rgba(20, 26, 51, .7);
  color: var(--c-mist);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.tab:hover { color: var(--c-white); border-color: var(--c-orange); }

.tab[aria-selected="true"] {
  color: var(--c-void);
  background: var(--c-orange);
  border-color: var(--c-orange);
  box-shadow: 0 0 16px rgba(255, 122, 26, .45);
}

.tab-panel[hidden] { display: none; }

/* ---------- 18. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 96;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(20, 26, 51, .92);
  border: 1px solid var(--c-line);
  color: var(--c-moon);
  font-size: 16px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-fast) var(--ease),
              visibility var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.to-top[data-visible] { opacity: 1; visibility: visible; }
.to-top:hover { border-color: var(--c-orange); color: var(--c-amber); }

@media (max-width: 1279px) {
  .to-top { right: 14px; bottom: 86px; }
}

/* ---------- 19. 显现动效 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(6px);
}

.js-ready [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
  transition: opacity 550ms var(--ease), transform 550ms var(--ease);
}

/* ---------- 20. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .js-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .scroll-progress-bar { transition: none; }
}