/* ============================================================
   球盟会官网登录入口汇总 — /assets/site.css
   共享外壳：reset｜变量｜中文排版｜头部｜页脚｜通用组件
   ============================================================ */

/* ---------- 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, figcaption, blockquote, dl, dd, pre {
  margin: 0;
}

ul, ol { padding: 0; }
ul[class], ol[class], nav ul, .footer-links, .nav-list, .toc { list-style: none; }

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

a { color: inherit; text-decoration: none; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

table { border-collapse: collapse; border-spacing: 0; }

hr {
  border: 0;
  border-top: 1px solid var(--sand-300);
  margin: 0;
}

/* ---------- 变量 ---------- */
:root {
  --ink-900: #0B1F1A;
  --ink-700: #123A31;
  --paper-100: #F3EFE4;
  --paper-200: #E5DECB;
  --cyan-400: #2BE6C8;
  --amber-500: #E0A83C;
  --red-500: #E4453A;
  --graphite-900: #14181C;
  --fog-500: #7C8A85;
  --sand-300: #C9BFA6;

  --font-display: 'Archivo Narrow', 'Oswald', 'PingFang SC', 'Noto Sans SC', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 72px;

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;

  --line-sand: 1px solid var(--sand-300);
  --line-soft: 1px solid rgba(201, 191, 166, 0.5);
  --line-dark: 1px solid rgba(201, 191, 166, 0.28);

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 中文排版与全局 ---------- */
body {
  min-height: 100vh;
  background-color: var(--paper-100);
  color: var(--graphite-900);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--graphite-900);
}

h1 { font-size: clamp(32px, 5.2vw, 44px); }
h2 { font-size: clamp(25px, 3.4vw, 32px); }
h3 { font-size: clamp(20px, 2.2vw, 24px); }
h4 { font-size: 19px; }

p { max-width: 68ch; }
p + p { margin-top: 0.9em; }

strong, b { font-weight: 700; }

.mono,
.num,
[data-count] {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

::selection {
  background: var(--cyan-400);
  color: var(--ink-900);
}

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: 2px;
}

.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;
}

/* ---------- 布局骨架 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main { padding-top: var(--header-h); }
.main--bleed { padding-top: 0; }
.bleed-top { padding-top: calc(var(--header-h) + clamp(28px, 5vw, 56px)); }

.band {
  position: relative;
  padding-block: clamp(36px, 6vw, 80px);
}
.band--ink { background-color: var(--ink-900); color: var(--paper-100); }
.band--ink h1, .band--ink h2, .band--ink h3, .band--ink h4 { color: var(--paper-100); }
.band--ink a { color: var(--cyan-400); }
.band--paper { background-color: var(--paper-100); }
.band--paper-2 { background-color: var(--paper-200); }
.band--split {
  background-image: linear-gradient(90deg,
    var(--ink-900) 0 42%,
    var(--paper-100) 42% 100%);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.col-2  { grid-column: span 2; }
.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-12 { grid-column: span 12; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 20px;
  padding-bottom: 12px;
  border-bottom: var(--line-sand);
  margin-bottom: clamp(18px, 2.4vw, 30px);
}
.kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fog-500);
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background: var(--cyan-400);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  transform: translateY(-220%);
  transition: transform 0.18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--ink-900);
  outline-offset: 2px;
}

/* ---------- 品牌块 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--paper-100);
  flex: none;
}
.brand-mark {
  width: 38px;
  height: 38px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1px solid var(--cyan-400);
  border-radius: 12px 5px 12px 5px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-400);
  background-image: linear-gradient(140deg, rgba(43, 230, 200, 0.18), rgba(43, 230, 200, 0));
}
.brand-text { display: grid; line-height: 1.15; }
.brand-line {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper-100);
}
.brand-sub {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--fog-500);
}

/* ---------- 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  background-color: transparent;
  background-image: linear-gradient(180deg,
    rgba(11, 31, 26, 0.94) 0%,
    rgba(11, 31, 26, 0.62) 58%,
    rgba(11, 31, 26, 0) 100%);
  border-bottom: 1px solid transparent;
  transition: background-color 0.2s var(--ease),
              border-color 0.2s var(--ease),
              box-shadow 0.2s var(--ease);
}
.site-header.is-solid {
  background-color: var(--ink-700);
  background-image: none;
  border-bottom-color: rgba(201, 191, 166, 0.45);
  box-shadow: 0 10px 30px -18px rgba(0, 0, 0, 0.75);
}

.header-shell {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  height: var(--header-h);
}

.header-tagline {
  max-width: none;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(243, 239, 228, 0.62);
  padding-left: 16px;
  border-left: 1px solid rgba(201, 191, 166, 0.38);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.5vw, 22px);
}
.nav-list a {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: rgba(243, 239, 228, 0.78);
  transition: color 0.18s var(--ease);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s var(--ease);
}
.nav-list a:hover { color: var(--paper-100); }
.nav-list a:hover::after { transform: scaleX(1); }
.nav-list a[aria-current="page"] { color: var(--cyan-400); }
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

.nav-utility {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-left: clamp(12px, 1.6vw, 22px);
  border-left: 1px solid rgba(201, 191, 166, 0.35);
}
.util-link {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: rgba(243, 239, 228, 0.72);
  transition: color 0.18s var(--ease);
}
.util-link:hover { color: var(--cyan-400); }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 8px 14px;
  border: 1px solid rgba(201, 191, 166, 0.5);
  border-radius: 999px;
  color: var(--paper-100);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan-400); color: var(--cyan-400); }
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle-bars { position: relative; }
.nav-toggle-bars::before,
.nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle-label { display: inline-block; }

/* 滚动进度轨道 */
.scroll-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(201, 191, 166, 0.2);
}
.scroll-rail-fill {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background-image: linear-gradient(90deg, var(--cyan-400), var(--amber-500));
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background-color: var(--ink-900);
  color: var(--paper-100);
  border-top: 1px solid rgba(201, 191, 166, 0.3);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-image: linear-gradient(90deg,
    var(--cyan-400) 0%,
    var(--cyan-400) 34%,
    var(--amber-500) 72%,
    var(--red-500) 100%);
}

.footer-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.6fr);
  gap: clamp(28px, 4vw, 64px);
  padding-block: clamp(38px, 5vw, 66px);
}

.footer-brand { min-width: 0; }
.brand--footer { margin-bottom: 16px; }
.footer-summary {
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(243, 239, 228, 0.74);
}
.footer-marks {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: var(--line-dark);
}
.footer-marks li { display: grid; gap: 3px; }
.mark-num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}
.mark-cap {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--fog-500);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.4vw, 34px);
}
.footer-col { min-width: 0; }
.footer-col-title {
  font-size: 15px;
  letter-spacing: 0.14em;
  color: var(--amber-500);
  margin-bottom: 14px;
}
.footer-links {
  display: grid;
  gap: 10px;
  font-size: 14.5px;
}
.footer-links a {
  color: rgba(243, 239, 228, 0.78);
  transition: color 0.18s var(--ease);
  word-break: break-word;
}
.footer-links a:hover { color: var(--cyan-400); }

.footer-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 16px 28px;
  padding-block: 22px;
  border-top: var(--line-dark);
}
.footer-note {
  max-width: none;
  font-size: 13px;
  line-height: 1.66;
  color: rgba(243, 239, 228, 0.62);
}
.footer-note .mono { color: var(--paper-100); }
.note-key {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 9px;
  border-radius: 999px;
  background: rgba(43, 230, 200, 0.14);
  color: var(--cyan-400);
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 22px;
  padding-block: 16px 24px;
  border-top: var(--line-dark);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--fog-500);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.2;
  white-space: nowrap;
  transition: background-color 0.18s var(--ease),
              color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}
.btn-primary { background: var(--cyan-400); color: var(--ink-900); }
.btn-primary:hover { background: var(--paper-100); color: var(--ink-900); }
.btn-ghost { border-color: rgba(243, 239, 228, 0.45); color: var(--paper-100); }
.btn-ghost:hover { border-color: var(--cyan-400); color: var(--cyan-400); }
.btn-ink { background: var(--ink-700); color: var(--paper-100); }
.btn-ink:hover { background: var(--ink-900); color: var(--cyan-400); }
.btn-amber { background: var(--amber-500); color: var(--ink-900); }
.btn-amber:hover { background: var(--paper-100); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 0;
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--fog-500);
}
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before {
  content: "/";
  color: var(--sand-300);
}
.breadcrumb a { color: var(--fog-500); transition: color 0.18s var(--ease); }
.breadcrumb a:hover { color: var(--ink-700); }
.breadcrumb [aria-current="page"] { color: var(--graphite-900); font-weight: 600; }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  padding: clamp(16px, 2vw, 24px);
  border: var(--line-sand);
  border-radius: var(--radius-md);
  background-color: var(--paper-200);
}
.card--ink {
  background-color: var(--ink-700);
  border-color: rgba(201, 191, 166, 0.28);
  color: var(--paper-100);
}
.card--ink h3, .card--ink h4 { color: var(--paper-100); }
.card--outline { background-color: transparent; }
.card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 14px;
  margin-bottom: 12px;
}
.card-title { font-size: 19px; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  border: 1px solid var(--sand-300);
  border-radius: 999px;
  background-color: var(--paper-100);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-700);
  white-space: nowrap;
}
.tag--cyan { border-color: rgba(43, 230, 200, 0.55); background-color: rgba(43, 230, 200, 0.14); }
.tag--amber { border-color: rgba(224, 168, 60, 0.55); background-color: rgba(224, 168, 60, 0.16); color: #6B4D10; }
.tag--red { border-color: rgba(228, 69, 58, 0.5); background-color: rgba(228, 69, 58, 0.14); color: #9A2E26; }

/* ---------- 摘要数字 ---------- */
.stat { display: grid; gap: 6px; }
.stat-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 6vw, 72px);
  line-height: 0.95;
  font-variant-numeric: tabular-nums;
  color: var(--amber-500);
}
.stat-cap {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--fog-500);
}

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border: var(--line-sand);
  border-radius: var(--radius-md);
  background-color: var(--paper-100);
  -webkit-overflow-scrolling: touch;
}
table.data {
  width: 100%;
  min-width: 520px;
  font-size: 15px;
  line-height: 1.5;
}
table.data th,
table.data td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(201, 191, 166, 0.5);
  vertical-align: top;
}
table.data thead th {
  background-color: var(--ink-700);
  color: var(--paper-100);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
table.data tbody tr:nth-child(even) { background-color: var(--paper-200); }
table.data tbody tr:last-child th,
table.data tbody tr:last-child td { border-bottom: 0; }
table.data .num,
table.data th.num,
table.data td.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* ---------- 时间轴 ---------- */
.timeline {
  position: relative;
  list-style: none;
  padding-left: 24px;
  margin: 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--sand-300);
}
.timeline li {
  position: relative;
  padding-bottom: 18px;
}
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 7px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--sand-300);
  border-radius: 50%;
  background: var(--paper-100);
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.timeline li[data-active]::before,
.timeline li.is-active::before {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  transform: scale(1.06);
}
.band--ink .timeline::before { background: rgba(201, 191, 166, 0.4); }
.band--ink .timeline li::before { background: var(--ink-900); }

/* ---------- 旁注 ---------- */
.note {
  max-width: none;
  font-size: 13px;
  line-height: 1.62;
  color: var(--fog-500);
}
.sidenote {
  padding-left: 14px;
  border-left: 2px solid var(--sand-300);
  font-size: 13px;
  line-height: 1.65;
  color: var(--fog-500);
}
.band--ink .note,
.band--ink .sidenote { color: rgba(243, 239, 228, 0.66); }
.band--ink .sidenote { border-left-color: rgba(43, 230, 200, 0.5); }

/* ---------- 目录 ---------- */
.toc {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-size: 14px;
}
.toc a {
  display: block;
  padding-left: 12px;
  border-left: 2px solid transparent;
  color: var(--fog-500);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.toc a:hover { color: var(--ink-700); }
.toc a[aria-current] {
  color: var(--graphite-900);
  border-left-color: var(--cyan-400);
  font-weight: 600;
}

/* ---------- 筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.filter-btn {
  padding: 7px 15px;
  border: 1px solid var(--sand-300);
  border-radius: 999px;
  background-color: var(--paper-100);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-700);
  transition: background-color 0.16s var(--ease),
              color 0.16s var(--ease),
              border-color 0.16s var(--ease);
}
.filter-btn:hover { border-color: var(--ink-700); }
.filter-btn[aria-pressed="true"] {
  background-color: var(--ink-700);
  border-color: var(--ink-700);
  color: var(--cyan-400);
}
.filter-count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--fog-500);
  font-variant-numeric: tabular-nums;
}
[data-filter-item][hidden] { display: none; }

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  border: var(--line-sand);
  border-radius: var(--radius-md);
  background-color: var(--ink-900);
}
.media > img,
.media > picture > img,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }
.media--fill { height: 100%; min-height: 220px; }
.media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--fog-500);
}

/* 抽象战术板底纹（无图时的占位） */
.tactical-grid {
  background-color: var(--ink-900);
  background-image:
    repeating-linear-gradient(0deg, rgba(43, 230, 200, 0.12) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(43, 230, 200, 0.12) 0 1px, transparent 1px 34px),
    radial-gradient(120% 90% at 12% 6%, rgba(43, 230, 200, 0.18), transparent 62%),
    radial-gradient(95% 75% at 92% 98%, rgba(224, 168, 60, 0.16), transparent 64%);
}

/* ---------- 进场显现 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

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

@media (max-width: 1023px) {
  :root { --header-h: 62px; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    margin-left: 0;
    display: grid;
    gap: 18px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 22px var(--gutter) 30px;
    background-color: var(--ink-900);
    border-bottom: 1px solid rgba(201, 191, 166, 0.45);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.2s var(--ease),
                transform 0.2s var(--ease),
                visibility 0.2s var(--ease);
  }
  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-list {
    display: grid;
    gap: 2px;
  }
  .nav-list a {
    display: block;
    padding: 12px 0;
    font-size: 20px;
    border-bottom: var(--line-dark);
  }
  .nav-list a::after { display: none; }
  .nav-list a[aria-current="page"] { color: var(--cyan-400); }

  .nav-utility {
    border-left: 0;
    padding-left: 0;
    display: grid;
    gap: 12px;
    justify-items: start;
  }
  .util-link { font-size: 14px; }
  .nav-utility .btn { width: 100%; }

  .footer-shell { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .band--split { background-image: none; background-color: var(--ink-900); color: var(--paper-100); }
  .band--split h1, .band--split h2, .band--split h3 { color: var(--paper-100); }
}

@media (max-width: 900px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-2  { grid-column: span 2; }
  .col-3  { grid-column: span 3; }
  .col-4  { grid-column: span 3; }
  .col-5  { grid-column: span 6; }
  .col-6  { grid-column: span 6; }
  .col-7  { grid-column: span 6; }
  .col-8  { grid-column: span 6; }
  .col-12 { grid-column: span 6; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }

  .grid-12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-12 > [class*="col-"] { grid-column: span 2; }

  .brand-mark { width: 34px; height: 34px; font-size: 18px; }
  .brand-line { font-size: 17px; }
  .brand-sub { font-size: 10px; letter-spacing: 0.1em; }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-meta { grid-template-columns: minmax(0, 1fr); }
  .footer-legal { justify-content: flex-start; }

  .section-head { align-items: flex-start; }
  table.data { min-width: 440px; font-size: 14px; }
  table.data th, table.data td { padding: 10px 12px; }
}

@media (max-width: 400px) {
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 动效降级 ---------- */
@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;
  }
  .js-reveal [data-reveal] {
    opacity: 1;
    transform: none;
  }
}