/* ==========================================================================
   爱体育赛场 V4 · 共享样式 /assets/site.css
   框架式导航：顶部版本条 + 左侧墨绿竖排脊 + 底部状态条
   色彩：墨场黑底 / 深墨卡片 / 赛场墨绿分区 / 荧光青锚点 / 灯光橙红行动点
   ========================================================================== */

/* ---------- 01 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

/* ---------- 02 设计令牌 ---------- */
:root {
  --ink: #070B0A;
  --ink-2: #0E1614;
  --green: #0F3D2F;
  --green-2: #1C6B51;
  --cyan: #2EF2C8;
  --cyan-deep: #0E7A65;
  --flame: #FF5A1F;
  --paper: #F2F6F4;
  --gray: #8C9C97;
  --line: #2A3634;

  --frame-top-h: 68px;
  --frame-rail-w: 88px;
  --frame-bottom-h: 40px;

  --r-xl: 28px;
  --r-lg: 20px;
  --r-md: 13px;
  --r-sm: 8px;

  --dur: 220ms;
  --ease: cubic-bezier(.22, .68, .32, 1);

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- 03 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(28, 107, 81, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 107, 81, .16) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: -1px -1px;
  padding-top: var(--frame-top-h);
  padding-left: var(--frame-rail-w);
  padding-bottom: var(--frame-bottom-h);
  transition: padding-left 260ms var(--ease);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

html.nav-open { overflow: hidden; }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 800; letter-spacing: -.01em; }
h1 { font-size: clamp(30px, 5vw, 48px); }
h2 { font-size: clamp(24px, 3.4vw, 36px); }
h3 { font-size: clamp(19px, 2.2vw, 28px); }
h4 { font-size: 18px; }
strong { font-weight: 800; color: var(--paper); }

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

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

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

/* ---------- 04 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .04em;
  transform: translateY(-220%);
  transition: transform 180ms var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: none; }

/* ---------- 05 品牌标识 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--green);
  border: 1px solid rgba(46, 242, 200, .28);
}

.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.15;
}

.brand__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .05em;
  color: var(--paper);
  white-space: nowrap;
}

.brand__sub {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gray);
  white-space: nowrap;
}

.brand__badge {
  flex: none;
  padding: 3px 9px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink);
  background: var(--flame);
}

.brand--stack {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}
.brand--stack .brand__name { font-size: 20px; }

a.brand:hover .brand__name { color: var(--cyan); }

/* ---------- 06 顶条 ---------- */
.frame-top {
  position: fixed;
  top: 0;
  left: var(--frame-rail-w);
  right: 0;
  z-index: 70;
  height: var(--frame-top-h);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 clamp(14px, 2.6vw, 28px);
  background: rgba(7, 11, 10, .9);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: left 260ms var(--ease);
}

.frame-quick {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.quick-link {
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: .02em;
  color: rgba(242, 246, 244, .78);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.quick-link:hover,
.quick-link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(46, 242, 200, .08);
}

/* ---------- 07 移动菜单按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 15px;
  border: 1px solid var(--green-2);
  border-radius: 999px;
  background: var(--green);
  color: var(--paper);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); }

.nav-toggle__lines {
  display: grid;
  gap: 4px;
  width: 18px;
}
.nav-toggle__lines i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform 200ms var(--ease), opacity 140ms linear;
}
.site-frame[data-open] .nav-toggle__lines i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-frame[data-open] .nav-toggle__lines i:nth-child(2) { opacity: 0; }
.site-frame[data-open] .nav-toggle__lines i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-toggle__label { letter-spacing: .06em; }

/* ---------- 08 左侧导航脊 ---------- */
.frame-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 65;
  width: var(--frame-rail-w);
  display: grid;
  grid-template-rows: auto 1fr auto;
  justify-items: center;
  align-items: center;
  padding: 22px 0;
  background: var(--green);
  border-right: 1px solid rgba(46, 242, 200, .16);
  overflow: hidden;
  transition: width 260ms var(--ease);
}

.rail__cap,
.rail__foot {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .3em;
  color: rgba(46, 242, 200, .55);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  user-select: none;
}

.nav-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 0;
  min-height: 0;
}

.nav-link {
  position: relative;
  display: block;
  padding: 12px 13px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .22em;
  color: rgba(242, 246, 244, .72);
  white-space: nowrap;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--paper);
  background: rgba(46, 242, 200, .1);
}
.nav-link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(7, 11, 10, .38);
}
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: var(--flame);
}

/* ---------- 09 底部状态条 ---------- */
.frame-bottom {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  height: var(--frame-bottom-h);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 clamp(12px, 2.6vw, 24px);
  background: rgba(7, 11, 10, .93);
  border-top: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font-size: 12px;
  color: var(--gray);
}

.frame-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--flame));
}

.frame-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: .04em;
}

.frame-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(46, 242, 200, .18);
  animation: framePulse 2.6s ease-in-out infinite;
}

@keyframes framePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .32; }
}

.frame-legal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  font-family: var(--font-mono);
  letter-spacing: .04em;
}
.frame-legal a { color: var(--gray); transition: color var(--dur) var(--ease); }
.frame-legal a:hover { color: var(--cyan); }
.frame-legal__sep { color: var(--green-2); }

/* ---------- 10 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(56px, 9vw, 118px);
  background: var(--ink-2);
  border-top: 1px solid var(--line);
}
.site-foot::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(90px, 18vw, 260px);
  height: 3px;
  background: linear-gradient(90deg, var(--flame), rgba(255, 90, 31, 0));
}

.foot-main {
  display: grid;
  grid-template-columns: minmax(220px, 1.15fr) minmax(0, 1.5fr) minmax(240px, 1.15fr);
  gap: clamp(28px, 4vw, 64px);
  max-width: 1560px;
  margin: 0 auto;
  padding: clamp(44px, 6vw, 86px) clamp(20px, 4vw, 56px) clamp(28px, 4vw, 48px);
}

.foot-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.foot-summary {
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.foot-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px clamp(16px, 2vw, 28px);
}

.foot-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--cyan);
  text-transform: uppercase;
}

.foot-col ul { display: flex; flex-direction: column; gap: 2px; }
.foot-col a {
  display: inline-block;
  padding: 5px 0;
  font-size: 14.5px;
  color: rgba(242, 246, 244, .74);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.foot-col a:hover,
.foot-col a:focus-visible {
  color: var(--cyan);
  transform: translateX(3px);
}

.contact-list { display: flex; flex-direction: column; margin-top: 0; }
.contact-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 3px 12px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
}
.contact-list li:first-child { border-top: 1px dashed var(--line); }

.contact-list__k {
  grid-column: 1 / -1;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gray);
}
.contact-list__v {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--paper);
  word-break: break-word;
}
.contact-list__v--text {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: rgba(242, 246, 244, .84);
}

.copy-btn {
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--gray);
  font-size: 11.5px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.copy-btn:hover { color: var(--cyan); border-color: var(--cyan); }
.copy-btn.is-done {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.foot-note {
  margin-top: 16px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--gray);
}

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  max-width: 1560px;
  margin: 0 auto;
  padding: 18px clamp(20px, 4vw, 56px);
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--gray);
}
.foot-copy { letter-spacing: .04em; }
.foot-icp { font-family: var(--font-mono); letter-spacing: .04em; }

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--gray);
  font-size: 12px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.to-top::before {
  content: "\2191";
  font-family: var(--font-mono);
  color: var(--flame);
}
.to-top:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------- 11 版心与网格 ---------- */
.shell {
  width: 100%;
  max-width: 1320px;
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 56px);
}
.shell--narrow { max-width: 860px; }
.shell--wide { max-width: 1560px; }

.grid { display: grid; gap: clamp(20px, 3vw, 40px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(150px, 220px) minmax(0, 1fr); }
.grid--halves { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* ---------- 12 满宽色带与标题 ---------- */
.band {
  position: relative;
  margin: clamp(38px, 6vw, 84px) 0;
  padding: clamp(34px, 5vw, 66px) 0;
}
.band--green { background: var(--green); }
.band--paper {
  background: var(--paper);
  color: #101A17;
}
.band--paper h1,
.band--paper h2,
.band--paper h3,
.band--paper h4,
.band--paper strong { color: #070B0A; }
.band--paper :focus-visible { outline-color: var(--cyan-deep); }
.band--paper .card {
  background: #FFFFFF;
  border-color: #D5E1DC;
  color: #101A17;
}
.band--paper .card__text { color: #4A5C56; }

.band__lead {
  max-width: 34ch;
  font-size: clamp(19px, 2.4vw, 27px);
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: -.01em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .26em;
  color: var(--cyan);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}

.section-title {
  font-size: clamp(25px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.015em;
}

/* ---------- 13 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .03em;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn--primary { background: var(--flame); color: #140500; }
.btn--primary:hover { background: #FF7440; transform: translateY(-2px); }
.btn--cyan { background: var(--cyan); color: var(--ink); }
.btn--cyan:hover { background: #63F7D7; transform: translateY(-2px); }
.btn--ghost {
  border-color: var(--green-2);
  background: transparent;
  color: var(--paper);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn:active { transform: translateY(0); }

/* ---------- 14 卡片与读数 ---------- */
.card {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  top: -74px;
  right: -62px;
  width: 190px;
  height: 190px;
  border-radius: 46% 54% 62% 38% / 52% 42% 58% 48%;
  background: radial-gradient(circle at 36% 36%, rgba(46, 242, 200, .2), rgba(46, 242, 200, 0) 68%);
  pointer-events: none;
}
.card > * { position: relative; }
.card:hover { border-color: var(--green-2); transform: translateY(-3px); }

.card__label {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}
.card__title {
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -.01em;
}
.card__text {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}
.stat__unit {
  margin-left: .28em;
  font-size: .46em;
  font-weight: 600;
  color: var(--gray);
}
.stat__label {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--gray);
}

/* ---------- 15 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .02);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray);
}
.tag--cyan {
  color: var(--cyan);
  border-color: rgba(46, 242, 200, .4);
  background: rgba(46, 242, 200, .08);
}
.tag--flame {
  color: var(--flame);
  border-color: rgba(255, 90, 31, .42);
  background: rgba(255, 90, 31, .09);
}

/* ---------- 16 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-2);
  -webkit-overflow-scrolling: touch;
}
.data-table {
  width: 100%;
  min-width: 560px;
  font-size: 15px;
}
.data-table th,
.data-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.data-table thead th {
  background: rgba(15, 61, 47, .5);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--cyan);
  white-space: nowrap;
}
.data-table tbody tr:nth-child(even) { background: rgba(14, 22, 20, .72); }
.data-table tbody tr:hover { background: rgba(28, 107, 81, .18); }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table .num {
  font-family: var(--font-mono);
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.band--paper .table-wrap { background: #FFFFFF; border-color: #D5E1DC; }
.band--paper .data-table th,
.band--paper .data-table td { border-color: #DDE7E3; color: #101A17; }
.band--paper .data-table thead th { background: #E4EFEB; color: #0B5E4E; }
.band--paper .data-table tbody tr:nth-child(even) { background: #F7FAF9; }

/* ---------- 17 长文 ---------- */
.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
}
.prose > * + * { margin-top: 1.05em; }
.prose h2 { margin-top: 2em; font-size: clamp(22px, 2.4vw, 30px); }
.prose h3 { margin-top: 1.6em; font-size: 19px; }
.prose ul { padding-left: 1.2em; list-style: disc; }
.prose ol { padding-left: 1.4em; list-style: decimal; }
.prose li { margin-top: .4em; }
.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(46, 242, 200, .5);
  text-underline-offset: 3px;
}
.band--paper .prose a { color: var(--cyan-deep); text-decoration-color: rgba(14, 122, 101, .5); }

/* ---------- 18 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
}
.media-frame > img,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--slab { aspect-ratio: 21 / 9; }
.media-frame--portrait { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tilt { transform: rotate(-1.2deg); }
.media-frame--blob::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 66% at 28% 22%, rgba(46, 242, 200, .17), rgba(46, 242, 200, 0) 70%),
    radial-gradient(52% 60% at 82% 88%, rgba(255, 90, 31, .14), rgba(255, 90, 31, 0) 72%);
  pointer-events: none;
}
.media-frame__cap {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(7, 11, 10, .8);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .08em;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

/* ---------- 19 横向滚动带 ---------- */
.strip {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding: 4px 0 18px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--green-2) transparent;
}
.strip > * {
  flex: 0 0 min(300px, 78vw);
  scroll-snap-align: start;
}
.strip::-webkit-scrollbar { height: 6px; }
.strip::-webkit-scrollbar-track { background: transparent; }
.strip::-webkit-scrollbar-thumb { background: var(--green-2); border-radius: 999px; }

/* ---------- 20 筛选按钮 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-btn {
  padding: 8px 17px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--gray);
  font-size: 13.5px;
  letter-spacing: .04em;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.filter-btn:hover { color: var(--paper); border-color: var(--green-2); }
.filter-btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 21 竖排旁注 ---------- */
.annote {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--gray);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  user-select: none;
}
.annote--flame { color: var(--flame); }
.annote--cyan { color: var(--cyan); }

/* ---------- 22 折叠问答 ---------- */
.accordion { border-top: 1px solid var(--line); }
.accordion__item { border-bottom: 1px solid var(--line); }
.accordion__btn {
  width: 100%;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 4px;
  border: 0;
  background: none;
  text-align: left;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}
.accordion__btn::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
  transition: transform var(--dur) var(--ease);
}
.accordion__btn[aria-expanded="true"] { color: var(--cyan); }
.accordion__btn[aria-expanded="true"]::after { transform: rotate(45deg); }
.accordion__panel {
  padding: 0 4px 20px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gray);
}

/* ---------- 23 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0;
  font-size: 12.5px;
  color: var(--gray);
}
.breadcrumb__item a { color: inherit; transition: color var(--dur) var(--ease); }
.breadcrumb__item a:hover { color: var(--cyan); }
.breadcrumb__item[aria-current="page"] { color: var(--paper); }
.breadcrumb__sep { color: var(--green-2); font-family: var(--font-mono); }

/* ---------- 24 滚动显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 240ms var(--ease), transform 240ms var(--ease);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

.js [data-fade-out] { transition: opacity 120ms linear; }
.js [data-fade-out].is-hiding { opacity: 0; }
.js [data-fade-in] { transition: opacity 180ms var(--ease); }

/* ---------- 25 响应式 ---------- */
@media (max-width: 1280px) {
  .foot-main { grid-template-columns: minmax(200px, 1fr) minmax(0, 1.4fr); }
  .foot-contact { grid-column: 1 / -1; }
}

@media (max-width: 1080px) {
  :root { --frame-rail-w: 76px; }
  .nav-link { font-size: 13px; padding: 11px 10px; letter-spacing: .16em; }
  .grid--split { grid-template-columns: 1fr; }
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .brand__sub { display: none; }
}

@media (min-width: 861px) and (max-height: 780px) {
  .rail__cap,
  .rail__foot { display: none; }
  .nav-link { font-size: 13px; padding: 9px 10px; letter-spacing: .16em; }
}

@media (max-width: 860px) {
  :root {
    --frame-rail-w: 0px;
    --frame-top-h: 60px;
    --frame-bottom-h: 38px;
  }

  .frame-top {
    left: 0;
    gap: 12px;
    padding: 0 14px;
  }
  .frame-quick { display: none; }
  .nav-toggle { display: inline-flex; }

  .frame-rail {
    top: var(--frame-top-h);
    bottom: auto;
    left: 0;
    right: 0;
    width: auto;
    height: auto;
    max-height: calc(100vh - var(--frame-top-h) - 16px);
    overflow-y: auto;
    display: block;
    padding: 18px clamp(16px, 5vw, 28px) 24px;
    border-right: 0;
    border-bottom: 1px solid rgba(46, 242, 200, .22);
    border-radius: 0 0 26px 26px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-14px);
    pointer-events: none;
    transition: opacity 200ms var(--ease), transform 240ms var(--ease), visibility 0s linear 240ms;
  }
  .site-frame[data-open] .frame-rail {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
    transition: opacity 200ms var(--ease), transform 240ms var(--ease), visibility 0s;
  }

  .rail__cap,
  .rail__foot { display: none; }

  .nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
  }
  .nav-link {
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    padding: 11px 18px;
    border: 1px solid rgba(242, 246, 244, .16);
    border-radius: 999px;
    font-size: 15px;
    letter-spacing: .04em;
  }
  .nav-link[aria-current="page"] {
    background: rgba(46, 242, 200, .13);
    border-color: var(--cyan);
  }
  .nav-link[aria-current="page"]::after {
    left: 50%;
    top: auto;
    bottom: 4px;
    width: 18px;
    height: 2px;
    transform: translateX(-50%);
  }

  .frame-bottom { font-size: 11.5px; gap: 10px; }
  .frame-legal { margin-left: auto; }

  .foot-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  h1 { font-size: clamp(27px, 8vw, 36px); }
  .foot-main {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 38px 20px 26px;
  }
  .foot-contact { grid-column: auto; }
  .foot-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 18px; }
  .foot-legal { padding: 16px 20px; }
  .to-top { margin-left: 0; }
  .grid--12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 460px) {
  .frame-status { display: none; }
  .foot-cols { grid-template-columns: 1fr; }
  .data-table { min-width: 480px; font-size: 14px; }
}

/* ---------- 26 动效偏好 ---------- */
@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 !important; transform: none !important; }
  .card:hover { transform: none; }
  .btn:hover { transform: none; }
  .foot-col a:hover { transform: none; }
}