/* ==========================================================================
   LOL押注正规 · 共享站点样式（/assets/site.css）
   数据舱 × 档案展签：切角面板 / 索引轨道 / 悬浮胶囊导航
   ========================================================================== */

/* ---------- 1. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; height: 1px; background: currentColor; opacity: .15; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色板 */
  --c-deep: #0A1830;
  --c-deep-soft: #0E1F3D;
  --c-hull: #122443;
  --c-gold: #F0A23C;
  --c-amber: #FFD79A;
  --c-violet: #7C5CFF;
  --c-cyan: #5AD7CF;
  --c-paper: #F6F1E7;
  --c-ink: #182033;
  --c-mist: #9DB0C9;
  --c-coral: #E36A5A;
  --c-white: #E8EEF7;

  /* 线条 */
  --line-dark: rgba(157, 176, 201, .20);
  --line-dark-strong: rgba(157, 176, 201, .40);
  --line-light: rgba(24, 32, 51, .14);

  /* 字体 */
  --font-head: 'Barlow Condensed', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-num: 'IBM Plex Mono', 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* 尺度 */
  --shell: 1240px;
  --rail: 80px;
  --gap: clamp(16px, 2.4vw, 32px);
  --section-y: clamp(48px, 6.5vw, 88px);
  --cut: 16px;
  --cut-lg: 26px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 180ms;
  --dur-slow: 240ms;

  --shadow-float: 0 22px 48px -28px rgba(3, 9, 20, .90);
  --shadow-card: 0 14px 34px -26px rgba(3, 9, 20, .75);

  /* 切角 */
  --clip-cut: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  --clip-cut-lg: polygon(0 0, calc(100% - var(--cut-lg)) 0, 100% var(--cut-lg), 100% 100%, var(--cut-lg) 100%, 0 calc(100% - var(--cut-lg)));
  --clip-corner: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: clamp(15px, .34vw + 14.2px, 17px);
  font-weight: 400;
  line-height: 1.8;
  color: var(--c-ink);
  background: var(--c-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -.012em;
  color: inherit;
}
h1 { font-size: clamp(2.6rem, 7.2vw, 5.6rem); line-height: .98; letter-spacing: -.025em; }
h2 { font-size: clamp(1.85rem, 3.4vw, 2.9rem); }
h3 { font-size: clamp(1.2rem, 1.9vw, 1.6rem); font-weight: 700; line-height: 1.22; letter-spacing: 0; }
h4 { font-size: clamp(1rem, 1.25vw, 1.12rem); font-weight: 700; line-height: 1.4; letter-spacing: 0; }

p { max-width: 68ch; }
strong, b { font-weight: 700; }
small { font-size: .82em; }

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 4. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -180%);
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--c-gold);
  color: #191006;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translate(-50%, 0); }

/* ---------- 5. 布局工具 ---------- */
.container {
  width: min(var(--shell), 100% - clamp(24px, 5vw, 56px));
  margin-inline: auto;
}

.page-shell {
  width: min(var(--shell), 100% - clamp(24px, 5vw, 56px));
  margin-inline: auto;
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 32px);
  align-items: start;
}

.rail {
  position: sticky;
  top: 104px;
  align-self: start;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding-top: 6px;
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: currentColor;
  opacity: .58;
}
.rail::before {
  content: "";
  width: 1px;
  height: 56px;
  background: linear-gradient(180deg, var(--c-gold), rgba(240, 162, 60, 0));
}
.rail-label {
  writing-mode: vertical-rl;
  letter-spacing: .32em;
  font-size: 10.5px;
  white-space: nowrap;
}

.section { padding-block: var(--section-y); }
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 32px;
  margin-bottom: clamp(24px, 3.4vw, 42px);
}
.section-head p { max-width: 52ch; }

.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 196px), 1fr)); }
.stack > * + * { margin-top: var(--gap); }

.on-dark { background: var(--c-deep); color: var(--c-white); }
.on-dark .lede { opacity: .78; }

.rule { height: 1px; background: var(--line-light); border: 0; }
.on-dark .rule { background: var(--line-dark); }

.prose { max-width: 72ch; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 1.9em; }
.prose h3 { margin-top: 1.5em; }
.prose ul, .prose ol { padding-left: 1.25em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* ---------- 6. 文本组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .18em;
  color: inherit;
  opacity: .65;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  flex: none;
  background: currentColor;
}

.lede {
  font-size: clamp(1rem, 1.35vw, 1.15rem);
  line-height: 1.85;
  max-width: 60ch;
  opacity: .82;
}

.num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.stat { display: flex; flex-direction: column; gap: 6px; }
.stat-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.4rem, 6vw, 5.4rem);
  font-weight: 600;
  line-height: .92;
  letter-spacing: -.045em;
  color: var(--c-amber);
}
.stat-label {
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .16em;
  opacity: .62;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  --btn-bg: rgba(157, 176, 201, .10);
  --btn-fg: var(--c-white);
  --btn-bd: var(--line-dark-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--btn-bd);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .05em;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
              color var(--dur) var(--ease), border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  --btn-bg: linear-gradient(135deg, var(--c-amber), var(--c-gold) 55%, #D9882A);
  --btn-fg: #191006;
  --btn-bd: transparent;
  box-shadow: 0 10px 26px -16px rgba(240, 162, 60, .90);
}
.btn-primary:hover { box-shadow: 0 16px 34px -16px rgba(240, 162, 60, .95); }

.btn-ghost { --btn-bg: transparent; --btn-fg: var(--c-white); --btn-bd: var(--line-dark-strong); }
.btn-ghost:hover { --btn-bg: rgba(157, 176, 201, .14); }

.btn-ink { --btn-bg: transparent; --btn-fg: var(--c-ink); --btn-bd: rgba(24, 32, 51, .28); }
.btn-ink:hover { --btn-bg: rgba(24, 32, 51, .07); }

.btn-cyan { --btn-bg: rgba(90, 215, 207, .14); --btn-fg: #2F9C96; --btn-bd: rgba(90, 215, 207, .48); }
.btn-cyan:hover { --btn-bg: rgba(90, 215, 207, .22); }

.btn-sm { padding: 9px 16px; font-size: 12.5px; }
.btn-lg { padding: 15px 30px; font-size: 15px; }

.link {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(90, 215, 207, .55);
  transition: color var(--dur) var(--ease), text-decoration-color var(--dur) var(--ease);
}
.link:hover { color: var(--c-gold); text-decoration-color: rgba(240, 162, 60, .7); }

/* ---------- 8. 标签与状态点 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 11px;
  border: 1px solid var(--line-dark-strong);
  border-radius: 999px;
  font-family: var(--font-num);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .12em;
  line-height: 1.6;
  color: inherit;
  white-space: nowrap;
}
.chip-solid {
  background: rgba(240, 162, 60, .16);
  border-color: rgba(240, 162, 60, .46);
  color: var(--c-amber);
}
.chip-cyan {
  background: rgba(90, 215, 207, .14);
  border-color: rgba(90, 215, 207, .42);
  color: #8CE7E0;
}
.chip-violet {
  background: rgba(124, 92, 255, .18);
  border-color: rgba(124, 92, 255, .46);
  color: #BCACFF;
}

.dot {
  display: inline-block;
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-cyan);
}
.dot-gold { background: var(--c-gold); }
.dot-violet { background: var(--c-violet); }
.dot-coral { background: var(--c-coral); }
.dot-pulse { box-shadow: 0 0 0 3px rgba(240, 162, 60, .18); }

/* ---------- 9. 切角面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--c-hull);
  border: 1px solid var(--line-dark);
  color: var(--c-white);
  clip-path: var(--clip-cut);
}
.panel-paper {
  background: #FFFDF8;
  border-color: var(--line-light);
  color: var(--c-ink);
}
.panel-deep {
  background: var(--c-deep-soft);
  border-color: var(--line-dark);
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .11em;
  opacity: .78;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before {
  content: "/";
  opacity: .45;
}
.breadcrumb a { transition: opacity var(--dur) var(--ease); }
.breadcrumb a:hover { opacity: .68; text-decoration: underline; text-underline-offset: 3px; }
.breadcrumb [aria-current="page"] { color: var(--c-gold); opacity: 1; }

/* ---------- 11. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-dark);
  background: linear-gradient(135deg, var(--c-hull), var(--c-deep));
  clip-path: var(--clip-cut);
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.media-16x9 { aspect-ratio: 16 / 9; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-3x2 { aspect-ratio: 3 / 2; }
.media-1x1 { aspect-ratio: 1 / 1; }
.media-wide { aspect-ratio: 21 / 9; }
.media-paper {
  background: linear-gradient(135deg, #EDE4D3, #F6F1E7);
  border-color: var(--line-light);
}
.media-placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .24em;
  opacity: .55;
}
.media-caption {
  margin-top: 10px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .09em;
  line-height: 1.7;
  opacity: .62;
}

/* ---------- 12. 折叠内容组 ---------- */
.accordion { border-top: 1px solid var(--line-light); }
.on-dark .accordion { border-top-color: var(--line-dark); }

.accordion-item { border-bottom: 1px solid var(--line-light); }
.on-dark .accordion-item { border-bottom-color: var(--line-dark); }

.accordion-trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 20px 0;
  text-align: left;
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 1.6vw, 1.32rem);
  font-weight: 700;
  line-height: 1.34;
  letter-spacing: .01em;
  color: inherit;
  transition: color var(--dur) var(--ease);
}
.accordion-trigger:hover { color: var(--c-gold); }
.accordion-trigger:focus-visible { outline-offset: 4px; }

.accordion-icon {
  position: relative;
  flex: none;
  width: 24px;
  height: 24px;
  margin-top: 3px;
  border: 1px solid currentColor;
  border-radius: 50%;
  opacity: .6;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.accordion-icon::before,
.accordion-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.accordion-icon::before { width: 10px; height: 1.5px; transform: translate(-50%, -50%); }
.accordion-icon::after { width: 1.5px; height: 10px; transform: translate(-50%, -50%); }
[aria-expanded="true"] .accordion-icon { opacity: 1; transform: rotate(180deg); }
[aria-expanded="true"] .accordion-icon::after { opacity: 0; transform: translate(-50%, -50%) rotate(90deg); }

.accordion-panel {
  height: 0;
  overflow: hidden;
  transition: height var(--dur-slow) var(--ease);
}
.accordion-panel-inner {
  padding: 0 0 22px;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.85;
  opacity: .84;
}
.accordion-panel-inner > * + * { margin-top: .8em; }

/* ---------- 13. 筛选标签 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 15px;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: inherit;
  background: transparent;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
              color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.filter-chip:hover { transform: translateY(-1px); border-color: rgba(24, 32, 51, .34); }
.filter-chip[aria-pressed="true"] {
  background: var(--c-deep);
  border-color: var(--c-deep);
  color: var(--c-amber);
}
.on-dark .filter-chip { border-color: var(--line-dark-strong); }
.on-dark .filter-chip:hover { border-color: var(--c-cyan); }
.on-dark .filter-chip[aria-pressed="true"] {
  background: rgba(240, 162, 60, .18);
  border-color: rgba(240, 162, 60, .55);
  color: var(--c-amber);
}

/* ---------- 14. 滚动进度与回顶 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 130;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-gold), var(--c-violet), var(--c-cyan));
  pointer-events: none;
}

.to-top {
  position: fixed;
  right: clamp(12px, 2vw, 22px);
  bottom: clamp(12px, 2vw, 22px);
  z-index: 95;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line-dark-strong);
  background: rgba(18, 36, 67, .94);
  color: var(--c-amber);
  font-family: var(--font-num);
  font-size: 16px;
  box-shadow: var(--shadow-float);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
              visibility var(--dur) var(--ease), background var(--dur) var(--ease);
}
.to-top[data-visible="true"] { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: rgba(240, 162, 60, .22); }

/* ---------- 15. 显现动画 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  will-change: opacity, transform;
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* ==========================================================================
   16. 共享头部
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  padding: clamp(10px, 1.6vw, 18px) clamp(12px, 3vw, 26px) 0;
  transition: padding var(--dur-slow) var(--ease);
}

.header-shell {
  position: relative;
  width: min(var(--shell), 100%);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 24px);
  padding: 10px clamp(12px, 1.6vw, 18px);
  border-radius: 999px;
  border: 1px solid var(--line-dark-strong);
  background: rgba(12, 27, 53, .84);
  color: var(--c-white);
  box-shadow: 0 18px 46px -30px #000;
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: padding var(--dur-slow) var(--ease), background var(--dur-slow) var(--ease),
              box-shadow var(--dur-slow) var(--ease), border-radius var(--dur-slow) var(--ease);
}

.site-header[data-scrolled="true"] { padding-top: 8px; }
.site-header[data-scrolled="true"] .header-shell {
  padding-block: 6px;
  background: rgba(10, 22, 44, .96);
  box-shadow: 0 26px 50px -30px #000;
}

/* 品牌铭牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 4px 6px 4px 0;
  color: var(--c-white);
}
.brand-mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .01em;
  color: #160D02;
  background: linear-gradient(140deg, var(--c-amber), var(--c-gold) 58%, #C97C1E);
  clip-path: var(--clip-corner);
  transition: transform var(--dur) var(--ease);
}
.brand:hover .brand-mark { transform: scale(1.06); }

.brand-copy { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.brand-name {
  display: block;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: .02em;
}
.brand-tagline {
  display: block;
  font-family: var(--font-num);
  font-size: 9.5px;
  letter-spacing: .13em;
  line-height: 1.4;
  color: var(--c-mist);
  white-space: nowrap;
}

/* 导航 */
.nav { margin-inline: auto; }
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: .035em;
  line-height: 1.4;
  white-space: nowrap;
  color: rgba(232, 238, 247, .78);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-link:hover { color: var(--c-white); background: rgba(157, 176, 201, .13); }
.nav-link[aria-current="page"] {
  color: var(--c-amber);
  background: rgba(240, 162, 60, .15);
}
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 12px;
  height: 1.5px;
  transform: translateX(-50%);
  background: var(--c-gold);
}

/* 头部右侧 */
.header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}
.header-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .1em;
  white-space: nowrap;
  color: var(--c-mist);
}
.header-cta { flex: none; }

/* 移动端开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-dark-strong);
  color: var(--c-white);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .08em;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover { background: rgba(157, 176, 201, .14); }
.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 16px;
  flex: none;
}
.nav-toggle-bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.site-header[data-nav-open="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(2.75px) rotate(45deg); }
.site-header[data-nav-open="true"] .nav-toggle-bars span:nth-child(2) { transform: translateY(-2.75px) rotate(-45deg); }
.nav-toggle-text { line-height: 1; }

/* ==========================================================================
   17. 共享页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  padding-top: clamp(38px, 6vw, 74px);
  background:
    radial-gradient(120% 70% at 8% 0%, rgba(124, 92, 255, .16), transparent 62%),
    radial-gradient(90% 60% at 92% 6%, rgba(90, 215, 207, .10), transparent 60%),
    var(--c-deep);
  color: var(--c-white);
  border-top: 1px solid var(--line-dark);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-violet) 42%, var(--c-cyan) 78%, transparent);
  opacity: .7;
}

.footer-inner {
  width: min(var(--shell), 100% - clamp(24px, 5vw, 56px));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.4fr) minmax(0, 1.1fr);
  gap: clamp(24px, 4vw, 56px);
  padding-bottom: clamp(28px, 4vw, 48px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 38ch;
}
.footer-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 600;
  color: #160D02;
  background: linear-gradient(140deg, var(--c-amber), var(--c-gold));
  clip-path: var(--clip-corner);
}
.footer-brandline {
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  font-weight: 700;
  line-height: 1.34;
  letter-spacing: .01em;
  max-width: none;
}
.footer-desc {
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--c-mist);
  max-width: 34ch;
}
.footer-notice {
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .07em;
  line-height: 1.8;
  color: rgba(227, 106, 90, .92);
  max-width: 36ch;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}
.footer-col { min-width: 0; }

.footer-col-title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: .18em;
  color: var(--c-mist);
}
.footer-col-title::before {
  content: "";
  flex: none;
  width: 14px;
  height: 1.5px;
  background: var(--c-gold);
}

.footer-list { display: grid; gap: 10px; }
.footer-list a {
  display: inline-block;
  padding: 2px 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(232, 238, 247, .82);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-list a:hover {
  color: var(--c-amber);
  border-bottom-color: rgba(240, 162, 60, .5);
}

.footer-contact { min-width: 0; }
.footer-dl { display: grid; gap: 0; }
.footer-dl-row {
  display: grid;
  gap: 2px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-dark);
}
.footer-dl-row:first-child { padding-top: 0; }
.footer-dl-row:last-child { border-bottom: 0; }
.footer-dl dt {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--c-mist);
}
.footer-dl dd {
  font-size: 12.8px;
  line-height: 1.7;
  color: rgba(232, 238, 247, .92);
  overflow-wrap: anywhere;
}

.footer-base {
  width: min(var(--shell), 100% - clamp(24px, 5vw, 56px));
  margin-inline: auto;
  padding: 16px 0 24px;
  border-top: 1px solid var(--line-dark);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .09em;
  color: var(--c-mist);
}
.footer-legal { max-width: none; }
.footer-copy { max-width: none; }
.footer-rules {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
}
.footer-rules a {
  color: var(--c-mist);
  transition: color var(--dur) var(--ease);
}
.footer-rules a:hover { color: var(--c-cyan); }

/* ==========================================================================
   18. 响应式
   ========================================================================== */
@media (max-width: 1120px) {
  .header-status { display: none; }
}

@media (max-width: 1023px) {
  /* 栅格塌为单列 */
  .page-shell { grid-template-columns: minmax(0, 1fr); }
  .rail { display: none; }

  /* 导航收进浮层 */
  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 10px);
    margin: 0;
    padding: 10px;
    display: block;
    border-radius: 22px;
    border: 1px solid var(--line-dark-strong);
    background: rgba(10, 22, 44, .97);
    box-shadow: var(--shadow-float);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(.99);
    transform-origin: 50% 0;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
                visibility var(--dur) var(--ease);
  }
  .nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-link {
    display: block;
    padding: 13px 14px;
    border-radius: 14px;
    font-size: 15px;
  }
  .nav-link[aria-current="page"]::after { display: none; }

  /* 页脚 */
  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; max-width: 46ch; }
}

@media (max-width: 720px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-brand { grid-column: auto; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .footer-rules { margin-left: 0; }
  .section-head { align-items: flex-start; }
}

@media (max-width: 560px) {
  .brand-tagline { display: none; }
  .brand-name { font-size: 17px; }
  .header-shell { gap: 8px; padding: 8px 10px; }
  .header-meta { gap: 8px; }
}

@media (max-width: 430px) {
  .header-cta { display: none; }
  .brand-mark { width: 34px; height: 34px; font-size: 10px; }
  .nav-toggle { padding: 8px 12px; }
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
}

/* 大屏留白节奏 */
@media (min-width: 1440px) {
  :root { --shell: 1320px; --rail: 88px; }
}

/* ---------- 19. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
  .btn:hover, .filter-chip:hover, .brand:hover .brand-mark { transform: none; }
}