/* ==========================================================================
   杏彩体育 · 共享样式表 /assets/site.css
   主题：看台暮色 · 展览画册式连续画布
   包含：reset、变量、中文排版、头部、页脚、通用组件、响应式
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --xc-signal: #F05A28;
  --xc-signal-deep: #A93513;
  --xc-lake: #0F6C8F;
  --xc-lake-mist: #8FBCCB;
  --xc-dusk: #4B3B6B;
  --xc-stand-deep: #14161A;
  --xc-stand-mid: #2B2F36;
  --xc-line: #C9C6C0;
  --xc-paper: #F4F2EE;
  --xc-panel: #FFFFFF;
  --xc-lime: #CBF23C;
  --xc-ink: #14161A;
  --xc-text: #2B2F36;
  --xc-muted: #6B6F76;

  --xc-shell: 1264px;
  --xc-ease: cubic-bezier(.2, .7, .3, 1);
  --xc-pill: 999px;

  --font-display: "Oswald", "Archivo Narrow", "Barlow Condensed", "Source Han Sans SC",
    "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui,
    -apple-system, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas,
    "Noto Sans Mono", monospace;

  color-scheme: light;
}

/* ---------- 2. reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 128px;
}

body {
  margin: 0;
  padding-top: 104px;
  background: var(--xc-paper);
  color: var(--xc-text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.8;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

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

h1, h2, h3, h4, h5, h6,
p, figure, blockquote { margin: 0; }

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

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

[hidden] { display: none !important; }

::selection { background: var(--xc-signal); color: #fff; }

:focus-visible {
  outline: 2px solid var(--xc-signal);
  outline-offset: 3px;
}

/* ---------- 3. 排版基元 ---------- */
.xc-display,
.xc-h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.02;
  color: var(--xc-ink);
}

.xc-h1 { font-size: clamp(38px, 6vw, 88px); }

.xc-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-size: clamp(28px, 3.4vw, 40px);
  color: var(--xc-ink);
}

.xc-h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.45;
  color: var(--xc-ink);
}

.xc-lead {
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.75;
  color: var(--xc-text);
}

.xc-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.xc-tabular { font-variant-numeric: tabular-nums; }

.xc-muted { color: var(--xc-muted); }

.xc-signal-text { color: var(--xc-signal-deep); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--xc-muted);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  flex: 0 0 auto;
  background: var(--xc-signal);
}

.section-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(44px, 7vw, 86px);
  line-height: 0.86;
  letter-spacing: -0.04em;
  color: var(--xc-line);
  font-variant-numeric: tabular-nums;
}

.prose { max-width: 38em; }

.prose p + p { margin-top: 1.15em; }

.prose h2 { margin-top: 2.4em; margin-bottom: 0.7em; }

.prose h3 { margin-top: 1.9em; margin-bottom: 0.55em; }

.prose ul,
.prose ol { margin-top: 1em; }

.prose li { position: relative; padding-left: 1.35em; }

.prose li + li { margin-top: 0.5em; }

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 12px;
  height: 1px;
  background: var(--xc-signal);
}

/* ---------- 4. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--xc-shell);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.container--narrow { max-width: 880px; }

.grid { display: grid; gap: clamp(20px, 3vw, 40px); }

.grid--7-3 { grid-template-columns: minmax(0, 7fr) minmax(0, 3fr); }

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

.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.deck-dark {
  background: var(--xc-stand-deep);
  color: var(--xc-paper);
}

.deck-panel { background: var(--xc-panel); }

.deck-paper { background: var(--xc-paper); }

.rule { border-top: 1px solid var(--xc-line); }

.rule-grid {
  background-image:
    linear-gradient(to right, rgba(20, 22, 26, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 22, 26, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* ---------- 5. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--xc-stand-deep);
  border-radius: 2px;
  background: var(--xc-stand-deep);
  color: var(--xc-paper);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  transition: background-color .25s var(--xc-ease), color .25s var(--xc-ease),
    border-color .25s var(--xc-ease), transform .25s var(--xc-ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--signal {
  background: var(--xc-signal);
  border-color: var(--xc-signal);
  color: #fff;
}

.btn--signal:hover {
  background: var(--xc-signal-deep);
  border-color: var(--xc-signal-deep);
}

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

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

.link-line {
  color: var(--xc-signal-deep);
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: opacity .22s var(--xc-ease);
}

.link-line:hover { opacity: 0.68; }

.plate {
  position: relative;
  display: block;
  background: var(--xc-panel);
  border: 1px solid var(--xc-line);
  border-radius: 0;
  padding: clamp(18px, 2.4vw, 28px);
  transition: transform .3s var(--xc-ease), border-color .3s var(--xc-ease);
}

.plate:hover {
  transform: translateY(-2px);
  border-color: var(--xc-stand-deep);
}

.plate__label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--xc-muted);
}

.plate__title {
  display: block;
  margin-top: 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--xc-ink);
}

.plate__body {
  display: block;
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--xc-text);
}

.plate__meta {
  display: block;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--xc-line);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--xc-muted);
}

.plate--dusk {
  background: var(--xc-dusk);
  border-color: var(--xc-dusk);
}

.plate--dusk .plate__title { color: #fff; }

.plate--dusk .plate__label,
.plate--dusk .plate__body,
.plate--dusk .plate__meta { color: rgba(244, 242, 238, 0.78); }

.plate--dusk .plate__meta { border-top-color: rgba(244, 242, 238, 0.22); }

.plate--dusk:hover { border-color: var(--xc-lake-mist); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--xc-line);
  border-radius: 0;
  background: var(--xc-panel);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--xc-muted);
  white-space: nowrap;
}

.tag--live {
  border-color: rgba(203, 242, 60, 0.5);
  background: var(--xc-stand-deep);
  color: var(--xc-lime);
}

.tag--lake {
  border-color: var(--xc-lake);
  color: var(--xc-lake);
}

.tag--dusk {
  border-color: var(--xc-dusk);
  color: var(--xc-dusk);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--xc-muted);
}

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

.breadcrumbs li + li::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--xc-line);
}

.breadcrumbs a { color: var(--xc-muted); transition: color .2s var(--xc-ease); }

.breadcrumbs a:hover { color: var(--xc-signal-deep); }

.breadcrumbs [aria-current="page"] { color: var(--xc-ink); font-weight: 600; }

/* 图片容器基础规则（页面阶段放置占位内容用） */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--xc-stand-mid);
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame--panorama { aspect-ratio: 16 / 7; }

.media-frame--hero { aspect-ratio: 2 / 1; }

.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__grain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(255, 255, 255, 0.05) 0 1px,
    transparent 1px 3px
  );
}

.media-frame__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 7px 12px;
  background: var(--xc-stand-deep);
  color: var(--xc-paper);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

/* ---------- 6. 头部 ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--xc-stand-deep);
  color: var(--xc-lime);
  border-radius: 2px;
  font-size: 14px;
  font-weight: 700;
  transition: top .22s var(--xc-ease);
}

.skip-link:focus { top: 16px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  padding: 14px clamp(12px, 3vw, 28px) 0;
  pointer-events: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--xc-signal);
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 90;
  pointer-events: none;
}

.nav-capsule {
  position: relative;
  pointer-events: auto;
  max-width: var(--xc-shell);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
  padding: 9px 10px 9px 18px;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  backdrop-filter: blur(16px) saturate(1.2);
  border: 1px solid var(--xc-line);
  border-radius: var(--xc-pill);
  transition: padding .34s var(--xc-ease), background-color .34s var(--xc-ease),
    border-color .34s var(--xc-ease);
}

.site-header[data-condensed] .nav-capsule {
  padding: 6px 8px 6px 14px;
  background: rgba(255, 255, 255, 0.97);
  border-color: rgba(20, 22, 26, 0.18);
}

.nav-capsule__brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  padding-right: clamp(10px, 1.6vw, 18px);
  border-right: 1px solid var(--xc-line);
}

.nav-capsule__mark {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  background: var(--xc-stand-deep);
  display: grid;
  place-items: center;
}

.nav-capsule__mark::before {
  content: "";
  width: 12px;
  height: 1px;
  background: var(--xc-lime);
  box-shadow: 0 -4px 0 var(--xc-lime), 0 4px 0 var(--xc-lime);
}

.nav-capsule__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav-capsule__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.15;
  color: var(--xc-ink);
  white-space: nowrap;
}

.nav-capsule__switch {
  display: grid;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  line-height: 1.35;
  white-space: nowrap;
}

.nav-capsule__switch > * {
  grid-area: 1 / 1;
  transition: opacity .28s var(--xc-ease), transform .28s var(--xc-ease);
}

.nav-capsule__tagline {
  color: var(--xc-muted);
  opacity: 1;
  transform: translateY(0);
}

.nav-capsule__section {
  color: var(--xc-signal-deep);
  font-weight: 700;
  opacity: 0;
  transform: translateY(5px);
}

.site-header[data-condensed] .nav-capsule__tagline {
  opacity: 0;
  transform: translateY(-5px);
}

.site-header[data-condensed] .nav-capsule__section {
  opacity: 1;
  transform: translateY(0);
}

.nav-capsule__nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 20px);
  margin-left: auto;
}

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

.nav-capsule__link {
  position: relative;
  display: block;
  padding: 8px 11px;
  border-radius: var(--xc-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--xc-text);
  white-space: nowrap;
  transition: color .22s var(--xc-ease), background-color .22s var(--xc-ease);
}

.nav-capsule__link:hover {
  color: var(--xc-ink);
  background-color: rgba(20, 22, 26, 0.055);
}

.nav-capsule__link[aria-current="page"] {
  color: var(--xc-signal-deep);
  font-weight: 700;
}

.nav-capsule__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 2px;
  height: 2px;
  background: var(--xc-signal);
}

.ticket-btn {
  --xc-notch: 5px;
  position: relative;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 3px;
  background: var(--xc-signal);
  color: #fff;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
  -webkit-mask-image:
    radial-gradient(circle var(--xc-notch) at 0 50%, transparent 98%, #000 100%),
    radial-gradient(circle var(--xc-notch) at 100% 50%, transparent 98%, #000 100%);
  -webkit-mask-size: 50% 100%;
  -webkit-mask-position: left, right;
  -webkit-mask-repeat: no-repeat;
  mask-image:
    radial-gradient(circle var(--xc-notch) at 0 50%, transparent 98%, #000 100%),
    radial-gradient(circle var(--xc-notch) at 100% 50%, transparent 98%, #000 100%);
  mask-size: 50% 100%;
  mask-position: left, right;
  mask-repeat: no-repeat;
  transition: background-color .25s var(--xc-ease), color .25s var(--xc-ease),
    transform .25s var(--xc-ease);
}

.ticket-btn:hover,
.ticket-btn:focus-visible {
  background: var(--xc-signal-deep);
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
  position: relative;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border: 1px solid var(--xc-line);
  border-radius: var(--xc-pill);
  background: var(--xc-panel);
  transition: border-color .22s var(--xc-ease);
}

.nav-toggle:hover { border-color: var(--xc-stand-deep); }

.nav-toggle__box {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle__bar {
  width: 16px;
  height: 1.5px;
  background: var(--xc-ink);
  transition: transform .26s var(--xc-ease), opacity .2s var(--xc-ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(72px, 10vw, 140px);
  background: var(--xc-stand-deep);
  color: var(--xc-paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--xc-signal);
}

.site-footer__inner {
  max-width: var(--xc-shell);
  margin-inline: auto;
  padding: clamp(48px, 7vw, 84px) clamp(18px, 4vw, 40px) clamp(32px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 2.5fr);
  gap: clamp(36px, 5vw, 72px);
}

.site-footer__mast {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  max-width: 340px;
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.1;
  color: #fff;
}

.site-footer__tagline {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: rgba(244, 242, 238, 0.62);
}

.site-footer__lamp {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--xc-lime);
}

.site-footer__lamp-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--xc-lime);
  animation: xc-lamp 2.4s ease-in-out infinite;
}

@keyframes xc-lamp {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.32; }
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.site-footer__col-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--xc-lake-mist);
  margin-bottom: 16px;
}

.site-footer__links li + li { margin-top: 10px; }

.site-footer__links a {
  font-size: 14.5px;
  color: rgba(244, 242, 238, 0.84);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .22s var(--xc-ease), border-color .22s var(--xc-ease);
}

.site-footer__links a:hover {
  color: var(--xc-lime);
  border-bottom-color: var(--xc-lime);
}

.site-footer__contact {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid rgba(244, 242, 238, 0.16);
}

.site-footer__contact-item {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.site-footer__contact-key {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--xc-lake-mist);
}

.site-footer__contact-value {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(244, 242, 238, 0.9);
  word-break: break-word;
}

.site-footer__base {
  border-top: 1px solid rgba(244, 242, 238, 0.14);
  background: rgba(0, 0, 0, 0.24);
}

.site-footer__base-inner {
  max-width: var(--xc-shell);
  margin-inline: auto;
  padding: 20px clamp(18px, 4vw, 40px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(244, 242, 238, 0.6);
}

.site-footer a:focus-visible,
.to-top:focus-visible { outline-color: var(--xc-lime); }

/* ---------- 8. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 70;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(203, 242, 60, 0.35);
  border-radius: 2px;
  background: var(--xc-stand-deep);
  color: var(--xc-lime);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .28s var(--xc-ease), transform .28s var(--xc-ease),
    visibility .28s var(--xc-ease), background-color .25s var(--xc-ease),
    color .25s var(--xc-ease);
}

.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  background: var(--xc-signal);
  border-color: var(--xc-signal);
  color: #fff;
}

.to-top__arrow {
  width: 11px;
  height: 11px;
  border-left: 2px solid currentColor;
  border-top: 2px solid currentColor;
  transform: rotate(45deg) translate(1px, 1px);
}

/* ---------- 9. 显现动效 ---------- */
html.xc-reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .32s var(--xc-ease), transform .32s var(--xc-ease);
}

html.xc-reveal-ready [data-reveal][data-in] {
  opacity: 1;
  transform: none;
}

/* ---------- 10. 响应式：平板 ---------- */
@media (max-width: 1023px) {
  .grid--7-3 { grid-template-columns: minmax(0, 1fr); }

  .nav-toggle {
    display: block;
    margin-left: auto;
  }

  .nav-capsule__nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    margin-left: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: var(--xc-panel);
    border: 1px solid var(--xc-line);
    border-radius: 6px;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .26s var(--xc-ease), transform .26s var(--xc-ease),
      visibility .26s var(--xc-ease);
  }

  .nav-capsule__nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-capsule__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-capsule__link {
    padding: 13px 14px;
    border-radius: 0;
    border-bottom: 1px solid rgba(20, 22, 26, 0.07);
    font-size: 15px;
  }

  .nav-capsule__link[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 0;
    bottom: 0;
    width: 3px;
    height: auto;
  }

  .nav-capsule__cta {
    margin-top: 12px;
    width: 100%;
  }

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

  .site-footer__mast { max-width: none; }

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

/* ---------- 11. 响应式：手机 ---------- */
@media (max-width: 767px) {
  body { padding-top: 88px; font-size: 16px; }

  html { scroll-padding-top: 108px; }

  .site-header { padding: 10px 12px 0; }

  .nav-capsule {
    padding: 7px 7px 7px 12px;
    gap: 10px;
  }

  .site-header[data-condensed] .nav-capsule { padding: 6px 6px 6px 11px; }

  .nav-capsule__brand { padding-right: 10px; }

  .nav-capsule__switch { display: none; }

  .nav-capsule__name { font-size: 15px; }

  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .media-frame--wide,
  .media-frame--panorama { aspect-ratio: 16 / 10; }

  .media-frame--hero { aspect-ratio: 4 / 3; }

  .to-top {
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 560px) {
  .site-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }

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

  .site-footer__base-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 12. 减少动态偏好 ---------- */
@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;
  }

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