/* ===========================================================
   XBET体育手机版 · 共享皮肤 /assets/site.css
   夜场战术板：竖轴轨道 + 切角面板 + 等宽数据
   =========================================================== */

*, *::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, fieldset {
  margin: 0;
}

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

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

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

a { color: inherit; }

:root {
  --ink: #0C2B24;
  --ink-deep: #14202B;
  --gold: #D8A93A;
  --gold-soft: #E6B94A;
  --signal: #F06A2E;
  --rock: #2E3433;
  --paper: #F3EEDF;
  --paper-raise: #FBF8EF;
  --slate: #5E7180;
  --moss: #6E7F5C;
  --clay: #B5644A;
  --board: #9FB7B0;

  --line: rgba(159, 183, 176, 0.26);
  --line-ink: rgba(12, 43, 36, 0.14);
  --line-ink-strong: rgba(12, 43, 36, 0.3);

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --rail-w: 88px;
  --bar-h: 56px;
  --maxw: 1280px;
  --cut: 20px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 200ms;
}

@media (min-width: 640px) {
  :root { --bar-h: 64px; }
}

/* ---------- 基础排版 ---------- */

body {
  font-family: var(--font-sans);
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--rock);
  background: var(--paper);
  letter-spacing: 0.01em;
  text-wrap: pretty;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  padding-top: var(--bar-h);
}

@media (min-width: 1024px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-w);
  }
}

body.nav-open { overflow: hidden; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.18;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 5.2vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.05rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.42rem); }
h4 { font-size: 1.02rem; }

p { text-wrap: pretty; }

.num,
[data-num] {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate);
}

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

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 跳转链接 ---------- */

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 11px 18px;
  background: var(--gold);
  color: var(--ink-deep);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform 160ms var(--ease);
}

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

/* ---------- 滚动进度 ---------- */

.scroll-meter {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 120;
  background: rgba(159, 183, 176, 0.18);
  pointer-events: none;
}

.scroll-meter__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--signal) 78%, var(--clay) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

@media (min-width: 1024px) {
  .scroll-meter { left: var(--rail-w); }
}

/* ---------- 页头：移动顶栏 / 桌面竖轴 ---------- */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--bar-h);
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid rgba(159, 183, 176, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 100%;
  width: 100%;
  padding: 0 clamp(14px, 3.6vw, 22px);
}

/* 品牌 */

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--paper);
  text-decoration: none;
}

.brand__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  background: var(--gold);
  color: var(--ink-deep);
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.brand__name {
  font-size: 15px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  line-height: 1.3;
  color: var(--board);
  white-space: nowrap;
}

/* 抽屉按钮 */

.nav-toggle {
  position: relative;
  z-index: 130;
  margin-left: auto;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 46px; height: 46px;
  padding: 0;
  background: rgba(243, 238, 223, 0.07);
  border: 1px solid rgba(216, 169, 58, 0.38);
  border-radius: 3px;
  color: var(--paper);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.nav-toggle:hover { background: rgba(216, 169, 58, 0.18); border-color: var(--gold); }

.nav-toggle__lines {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
}

.nav-toggle__lines span {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.site-header[data-open] .nav-toggle__lines span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__lines span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__lines span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 导航抽屉（移动/平板） */

.site-nav {
  position: fixed;
  top: var(--bar-h);
  left: 0;
  bottom: 0;
  z-index: 120;
  width: min(88vw, 340px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 20px 28px;
  background: var(--ink-deep);
  color: var(--paper);
  border-right: 1px solid rgba(216, 169, 58, 0.3);
  box-shadow: 24px 0 48px rgba(0, 0, 0, 0.38);
  transform: translateX(-104%);
  visibility: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  transition: transform 220ms var(--ease), visibility 220ms var(--ease);
}

.site-header[data-open] .site-nav {
  transform: translateX(0);
  visibility: visible;
}

.site-nav__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--board);
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(159, 183, 176, 0.22);
}

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

.site-nav__item { min-width: 0; }

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 11px 12px;
  color: var(--paper);
  opacity: 0.86;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  box-shadow: inset 2px 0 0 0 transparent;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  opacity: 1;
  color: var(--gold);
  background: rgba(216, 169, 58, 0.1);
}

.site-nav__link[aria-current="page"] {
  opacity: 1;
  color: var(--gold);
  font-weight: 800;
  background: rgba(216, 169, 58, 0.12);
  box-shadow: inset 2px 0 0 0 var(--gold);
}

.site-nav__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--board);
}

.site-nav__link[aria-current="page"] .site-nav__num { color: var(--gold); }

.site-nav__label { min-width: 0; }

.site-nav__foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid rgba(159, 183, 176, 0.2);
}

.site-nav__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--board);
}

/* 遮罩 */

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: rgba(12, 43, 36, 0.66);
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms var(--ease);
}

.site-header[data-open] .nav-scrim {
  opacity: 1;
  pointer-events: auto;
}

/* 轨道刻度（仅桌面） */

.rail-note {
  display: none;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding-bottom: 4px;
  color: var(--board);
  text-align: center;
}

.rail-note__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--gold);
}

.rail-note__text {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  writing-mode: vertical-rl;
}

/* 桌面：竖轴轨道 */

@media (min-width: 1024px) {
  .site-header {
    right: auto;
    bottom: 0;
    width: var(--rail-w);
    height: auto;
    border-bottom: 0;
    border-right: 1px solid rgba(159, 183, 176, 0.22);
  }

  .header-inner {
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 18px;
    padding: 20px 0 14px;
  }

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

  .brand__mark { width: 42px; height: 42px; font-size: 19px; }

  .brand__text { align-items: center; }

  .brand__name {
    writing-mode: vertical-rl;
    font-size: 13px;
    letter-spacing: 0.16em;
  }

  .brand__tagline { display: none; }

  .nav-toggle { display: none; }

  .nav-scrim { display: none; }

  .site-nav {
    position: static;
    transform: none;
    visibility: visible;
    width: auto;
    flex: 1 1 auto;
    min-height: 0;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
    overflow: visible;
  }

  .site-nav__eyebrow,
  .site-nav__foot { display: none; }

  .site-nav__list {
    flex-direction: column;
    align-items: center;
    gap: 2px;
  }

  .site-nav__link {
    writing-mode: vertical-rl;
    min-height: 0;
    padding: 10px 5px;
    font-size: 12.5px;
    letter-spacing: 0.14em;
    line-height: 1.2;
    opacity: 0.8;
  }

  .site-nav__num { display: none; }

  .rail-note { display: flex; flex-direction: column; }
}

/* ---------- 页脚 ---------- */

.site-footer {
  position: relative;
  margin-top: clamp(40px, 7vw, 88px);
  padding: clamp(34px, 5vw, 64px) 0 clamp(20px, 3vw, 28px);
  background: var(--ink-deep);
  color: var(--paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0 42%, var(--signal) 42% 56%, rgba(159, 183, 176, 0.34) 56% 100%);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

@media (min-width: 820px) {
  .footer-top { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.95fr); }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.footer-brand__kicker {
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--paper);
  line-height: 1.2;
}

.footer-brand__line {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.footer-brand__note {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(243, 238, 223, 0.72);
  max-width: 30em;
}

.footer-brand__cta { margin-top: 6px; }

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 18px;
}

@media (min-width: 560px) {
  .footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.footer-col { min-width: 0; }

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(159, 183, 176, 0.22);
}

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

.footer-link {
  display: inline-block;
  padding: 7px 0;
  font-size: 14.5px;
  color: rgba(243, 238, 223, 0.8);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--clay);
}

.footer-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px 24px;
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid rgba(159, 183, 176, 0.22);
}

@media (min-width: 760px) {
  .footer-contact { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.footer-contact__item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--board);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--paper);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  margin-top: clamp(20px, 3vw, 28px);
  padding-top: 14px;
  border-top: 1px solid rgba(159, 183, 176, 0.16);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(243, 238, 223, 0.6);
}

.footer-note {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(243, 238, 223, 0.52);
  max-width: 46em;
}

/* ---------- 容器与网格 ---------- */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

.container--narrow { max-width: 860px; }

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

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

@media (max-width: 899px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-4, .span-5, .span-6, .span-7, .span-8 { grid-column: span 6; }
}

.section { padding-block: clamp(28px, 5vw, 64px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

/* ---------- 正文面 ---------- */

.prose { max-width: 38em; }

.prose > * + * { margin-top: 1.05em; }

.prose h2 { margin-top: 1.9em; }
.prose h3 { margin-top: 1.5em; }

.prose ul,
.prose ol { padding-left: 1.25em; }

.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }

.prose li + li { margin-top: 0.42em; }

.prose a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.prose a:hover {
  color: var(--ink);
  text-decoration-thickness: 2px;
}

.prose--invert { color: rgba(243, 238, 223, 0.86); }
.prose--invert h2,
.prose--invert h3 { color: var(--paper); }
.prose--invert a { color: var(--gold); }
.prose--invert a:hover { color: var(--gold-soft); }

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 11px 20px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid transparent;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn:hover { background: var(--rock); }
.btn:active { transform: translateY(1px); }

.btn--gold {
  background: var(--gold);
  color: var(--ink-deep);
  border-color: var(--gold);
}

.btn--gold:hover { background: var(--gold-soft); color: var(--ink-deep); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-ink-strong);
}

.btn--ghost:hover { background: rgba(12, 43, 36, 0.07); border-color: var(--ink); }

.btn--sm {
  min-height: 38px;
  padding: 8px 14px;
  font-size: 13.5px;
}

/* ---------- 切角面板 ---------- */

.panel {
  position: relative;
  background: var(--paper-raise);
  padding: clamp(18px, 2.6vw, 26px);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.panel--dark {
  background: var(--ink);
  color: var(--paper);
}

.panel--dark h2,
.panel--dark h3,
.panel--dark h4 { color: var(--paper); }

.panel--data {
  background: rgba(94, 113, 128, 0.1);
  border-left: 3px solid var(--slate);
}

.panel__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--slate);
  margin-bottom: 10px;
}

.panel--dark .panel__label { color: var(--board); }

/* ---------- 图片槽 ---------- */

.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: var(--media-ratio, 16 / 9);
  background: linear-gradient(152deg, #1B3A31 0%, var(--ink) 56%, var(--ink-deep) 100%);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.media > img,
.media > picture,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

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

.media--grid::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(159, 183, 176, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 183, 176, 0.18) 1px, transparent 1px);
  background-size: 36px 36px;
}

.media__caption {
  position: absolute;
  left: 12px;
  bottom: 10px;
  z-index: 2;
  padding: 3px 9px;
  background: rgba(12, 43, 36, 0.72);
  color: rgba(243, 238, 223, 0.9);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

/* ---------- 面包屑 ---------- */

.breadcrumbs { padding-block: 14px; }

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumbs li::after {
  content: "/";
  color: var(--board);
}

.breadcrumbs li:last-child::after { content: ""; }

.breadcrumbs a {
  color: var(--slate);
  text-decoration: none;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 筛选 chips ---------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  padding: 7px 15px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line-ink-strong);
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.chip:hover {
  border-color: var(--ink);
  background: rgba(12, 43, 36, 0.06);
}

.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
  font-weight: 800;
  box-shadow: inset 0 0 0 1px var(--gold);
}

/* ---------- 分段标签页 ---------- */

.tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 10px;
  scrollbar-width: thin;
}

.tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: rgba(94, 113, 128, 0.12);
  border: 1px solid var(--line-ink);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.tab:hover { background: rgba(94, 113, 128, 0.24); }

.tab[aria-selected="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  box-shadow: inset 0 -3px 0 var(--gold);
}

.tabpanel { padding-top: clamp(14px, 2vw, 22px); }

.tabpanel[hidden] { display: none; }

/* ---------- 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;
    scroll-behavior: auto !important;
  }

  .site-nav { transition: none; }
  .scroll-meter__bar { transition: none; }
}