/* ==========================================================================
   游咔主站 · 共享样式表 /assets/site.css
   高原蓝 + 孔雀绿 + 橙黄 · 切角面板 · 展签式标注 · 等宽数据
   ========================================================================== */

/* --- 1. reset ----------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body { margin: 0; }

[hidden] { display: none !important; }

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

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

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

table { border-collapse: collapse; }

/* --- 2. 变量 ------------------------------------------------------------ */
:root {
  --c-plateau: #0E4C92;
  --c-plateau-deep: #0A3A71;
  --c-night: #081C33;
  --c-peacock: #00A07A;
  --c-peacock-deep: #00805F;
  --c-amber: #FFB021;
  --c-paper: #FFF7EC;
  --c-card: #FFFFFF;
  --c-ink: #16202C;
  --c-steel: #6C7A8C;
  --c-line: #DCE1E8;
  --c-line-soft: rgba(255, 255, 255, 0.15);

  --c-stock: #2FA84F;
  --c-transfer: #F2A93B;
  --c-preorder: #6B8CAE;
  --c-coral: #E4635B;

  --r-central: #2D9CDB;
  --r-east: #27C1A9;
  --r-south: #7BC043;
  --r-west: #F2C230;
  --r-nw: #F08A3C;
  --r-out: #E4635B;

  --cut: 12px;
  --cut-sm: 8px;
  --cut-lg: 18px;

  --container: 1200px;
  --gut: 24px;

  --t-fast: 180ms;
  --t-mid: 240ms;

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans CJK SC",
    "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Mono", "SFMono-Regular", Consolas,
    "Liberation Mono", Menlo, monospace;
}

/* --- 3. 基础排版 -------------------------------------------------------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-ink);
  background-color: var(--c-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--c-plateau); text-decoration: none; }
a:hover { color: var(--c-peacock); }

strong { font-weight: 800; }

.mono,
code,
kbd {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.92em;
  letter-spacing: 0;
}

.prose { max-width: 38ch; }
.prose p { font-size: 17px; line-height: 1.85; }
.prose p + p { margin-top: 1.1em; }
.prose a { border-bottom: 2px solid rgba(0, 160, 122, 0.35); }
.prose a:hover { border-bottom-color: var(--c-peacock); }

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

/* --- 4. 布局容器 -------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gut);
}

main { display: block; }

#main-content { display: block; }

/* --- 5. 切角统一 -------------------------------------------------------- */
.cut,
.btn,
.tag,
.chip,
.panel,
.region-card,
.copy-btn,
.nav-toggle,
.skip-link,
.header-meta,
.section-tag,
.media-frame,
.compare-bar__inner {
  clip-path: polygon(
    var(--cut) 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%,
    0 var(--cut)
  );
}

/* --- 6. 跳转链接 -------------------------------------------------------- */
.skip-link {
  --cut: 10px;
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 11px 20px;
  background-color: var(--c-amber);
  color: var(--c-night);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  transition: top var(--t-fast) ease;
}

.skip-link:focus {
  top: 12px;
  color: var(--c-night);
}

/* --- 7. 头部 ------------------------------------------------------------ */
.site-header {
  position: relative;
  z-index: 60;
}

/* 7.1 品牌行 */
.header-brandbar {
  background-color: var(--c-plateau);
  color: #fff;
  background-image: linear-gradient(115deg, rgba(0, 160, 122, 0.22) 0%, rgba(0, 160, 122, 0) 46%);
}

.header-brandbar__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 80px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: #fff;
}

.brand:hover { color: #fff; }

.brand-mark {
  --cut: 10px;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background-color: var(--c-amber);
  color: var(--c-night);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.04em;
  clip-path: polygon(
    10px 0, 100% 0, 100% calc(100% - 10px),
    calc(100% - 10px) 100%, 0 100%, 0 10px
  );
}

.brand-text { display: block; }

.brand-name {
  display: block;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.03em;
  line-height: 1.25;
}

.brand-tag {
  display: block;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.72);
}

.header-meta {
  --cut: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 0 auto;
  padding: 7px 13px;
  background-color: rgba(8, 28, 51, 0.42);
  color: rgba(255, 255, 255, 0.78);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.header-meta__dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background-color: var(--c-peacock);
  box-shadow: 0 0 0 3px rgba(0, 160, 122, 0.24);
}

.header-cta { flex: 0 0 auto; }

/* 7.2 移动菜单按钮 */
.nav-toggle {
  --cut: 9px;
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background-color: rgba(8, 28, 51, 0.5);
  color: #fff;
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color var(--t-fast) ease, border-color var(--t-fast) ease,
    color var(--t-fast) ease;
}

.nav-toggle:hover { border-color: var(--c-amber); color: var(--c-amber); }

.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 12px;
  flex: 0 0 auto;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: currentColor;
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

/* 7.3 导航条 */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--c-night);
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background-image: linear-gradient(90deg, rgba(14, 76, 146, 0.55), rgba(8, 28, 51, 0) 42%);
}

.nav-bar__inner {
  display: flex;
  align-items: center;
  position: relative;
}

.site-nav { flex: 1 1 auto; }

.nav-list {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: block;
  padding: 15px 17px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-bottom: 3px solid transparent;
  transition: color var(--t-fast) ease, background-color var(--t-fast) ease,
    border-color var(--t-fast) ease;
}

.nav-link:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-link::after {
  content: attr(data-summary);
  position: absolute;
  left: 50%;
  top: calc(100% + 9px);
  transform: translateX(-50%);
  z-index: 8;
  padding: 6px 11px;
  background-color: var(--c-card);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--t-fast) ease, visibility var(--t-fast) ease;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  opacity: 1;
  visibility: visible;
}

.nav-link[aria-current="page"] {
  color: #fff;
  background-color: var(--c-plateau);
  background-image: linear-gradient(180deg, rgba(255, 176, 33, 0.22), rgba(255, 176, 33, 0) 70%);
  box-shadow: inset 0 0 0 2px var(--c-amber);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background-color: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background-color: var(--c-amber);
  transition: width 120ms linear;
}

/* --- 8. 页脚 ------------------------------------------------------------ */
.site-footer {
  position: relative;
  margin-top: 96px;
  padding-bottom: 34px;
  background-color: var(--c-night);
  color: rgba(255, 255, 255, 0.76);
  background-image:
    radial-gradient(900px 340px at 88% -10%, rgba(14, 76, 146, 0.55), rgba(8, 28, 51, 0) 70%),
    linear-gradient(180deg, rgba(0, 160, 122, 0.1), rgba(8, 28, 51, 0) 34%);
}

.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background-image: repeating-linear-gradient(
    135deg,
    var(--c-amber) 0 14px,
    var(--c-night) 14px 28px
  );
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 34px;
  padding: 58px 0 40px;
  border-bottom: 1px solid var(--c-line-soft);
}

.footer-brand {
  margin: 0 0 6px;
  font-size: 23px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: #fff;
}

.footer-brand-sub {
  margin: 0 0 20px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-cta { margin-top: 4px; }

.footer-col__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-peacock);
}

.footer-col__title::before { content: "[ "; }
.footer-col__title::after { content: " ]"; }

.footer-list {
  display: grid;
  gap: 11px;
}

.footer-link {
  display: inline-block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.76);
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}

.footer-link:hover {
  color: var(--c-amber);
  border-bottom-color: var(--c-amber);
}

/* 区域色卡带 */
.region-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  padding: 36px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.region-card {
  position: relative;
  padding: 14px 12px 14px 17px;
  background-color: rgba(255, 255, 255, 0.05);
  overflow: hidden;
}

.region-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background-color: var(--rc, var(--c-plateau));
}

.region-card--central { --rc: var(--r-central); }
.region-card--east { --rc: var(--r-east); }
.region-card--south { --rc: var(--r-south); }
.region-card--west { --rc: var(--r-west); }
.region-card--nw { --rc: var(--r-nw); }
.region-card--out { --rc: var(--r-out); }

.region-card__name {
  display: block;
  margin-bottom: 5px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
}

.region-card__desc {
  display: block;
  font-size: 11.5px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.6);
}

/* 联系方式 */
.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 22px 28px;
  padding: 34px 0 22px;
}

.footer-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.footer-contact__label {
  flex: 0 0 100%;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-peacock);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  color: #fff;
  word-break: break-word;
}

.footer-contact__value--wide {
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
}

.footer-note {
  margin: 0;
  padding-bottom: 26px;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.56);
  border-bottom: 1px solid var(--c-line-soft);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding-top: 26px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-copy { margin: 0; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-legal .footer-link { font-size: 12.5px; }

.footer-datanote {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.45);
}

/* --- 9. 按钮 ------------------------------------------------------------ */
.btn {
  --cut: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 0;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.02em;
  background-color: var(--c-plateau);
  color: #fff;
  transition: background-color var(--t-fast) ease, color var(--t-fast) ease,
    transform var(--t-fast) ease;
}

.btn:hover {
  background-color: var(--c-plateau-deep);
  color: #fff;
  transform: translateY(-2px);
}

.btn:active { transform: translateY(0); }

.btn--primary {
  background-color: var(--c-amber);
  color: var(--c-night);
}

.btn--primary:hover {
  background-color: #FFC352;
  color: var(--c-night);
}

.btn--ghost {
  background-color: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.btn--ghost:hover {
  background-color: var(--c-amber);
  color: var(--c-night);
}

.btn--sm {
  --cut: 8px;
  padding: 9px 16px;
  font-size: 13.5px;
}

/* --- 10. 标签 / 状态 / 面板 -------------------------------------------- */
.tag {
  --cut: 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.06em;
  background-color: rgba(14, 76, 146, 0.1);
  color: var(--c-plateau);
}

.tag--peacock { background-color: rgba(0, 160, 122, 0.14); color: var(--c-peacock-deep); }
.tag--dark { background-color: rgba(8, 28, 51, 0.09); color: var(--c-night); }
.tag--region { background-color: var(--c-plateau); color: #fff; }
.tag--central { background-color: var(--r-central); color: #fff; }
.tag--east { background-color: var(--r-east); color: var(--c-night); }
.tag--south { background-color: var(--r-south); color: var(--c-night); }
.tag--west { background-color: var(--r-west); color: var(--c-night); }
.tag--nw { background-color: var(--r-nw); color: var(--c-night); }
.tag--out { background-color: var(--r-out); color: #fff; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.status__dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: 50%;
  background-color: currentColor;
}

.status--stock { color: var(--c-stock); }
.status--transfer { color: var(--c-transfer); }
.status--preorder { color: var(--c-preorder); }
.status--soon { color: var(--c-coral); }

.panel {
  background-color: var(--c-card);
  color: var(--c-ink);
  padding: 26px 24px;
}

.panel--dark { background-color: var(--c-night); color: rgba(255, 255, 255, 0.82); }
.panel--dark h2, .panel--dark h3, .panel--dark h4 { color: #fff; }
.panel--plateau { background-color: var(--c-plateau); color: rgba(255, 255, 255, 0.86); }
.panel--plateau h2, .panel--plateau h3 { color: #fff; }
.panel--peacock { background-color: var(--c-peacock); color: #fff; }
.panel--peacock h2, .panel--peacock h3 { color: #fff; }

.grid-veil {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
}

.grid-veil--ink {
  background-image:
    linear-gradient(rgba(14, 76, 146, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 76, 146, 0.08) 1px, transparent 1px);
}

/* --- 11. 章节 ----------------------------------------------------------- */
.section { padding: 72px 0; }
.section--tight { padding: 44px 0; }
.section--wide { padding: 96px 0; }
.section--dark { background-color: var(--c-night); color: rgba(255, 255, 255, 0.8); }
.section--plateau { background-color: var(--c-plateau); color: rgba(255, 255, 255, 0.84); }
.section--dark .section-title,
.section--plateau .section-title { color: #fff; }
.section--dark .section-lead,
.section--plateau .section-lead { color: rgba(255, 255, 255, 0.72); }
.section--dark .footer-link,
.section--plateau .footer-link { color: rgba(255, 255, 255, 0.8); }

.section-head {
  display: grid;
  gap: 14px;
  max-width: 760px;
  margin-bottom: 38px;
}

.section-tag {
  --cut: 8px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-self: start;
  padding: 5px 12px;
  background-color: rgba(0, 160, 122, 0.13);
  color: var(--c-peacock-deep);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.section--dark .section-tag,
.section--plateau .section-tag {
  background-color: rgba(255, 176, 33, 0.18);
  color: var(--c-amber);
}

.section-title {
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  font-weight: 900;
}

.section-lead {
  margin: 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-steel);
}

/* --- 12. 网格 ----------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--gut);
}

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

.span-3 { grid-column: span 3; }
.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-9 { grid-column: span 9; }
.span-10 { grid-column: span 10; }
.span-12 { grid-column: span 12; }

/* --- 13. 面包屑 --------------------------------------------------------- */
.breadcrumb { padding: 20px 0 4px; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--c-steel);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--c-line);
}

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

.breadcrumb__link { color: var(--c-steel); }
.breadcrumb__link:hover { color: var(--c-peacock); }

/* --- 14. 横向轨道 ------------------------------------------------------- */
.rail {
  position: relative;
  margin-inline: calc(var(--gut) * -1);
}

.rail__track {
  display: flex;
  gap: 16px;
  padding: 4px var(--gut) 18px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--c-steel) transparent;
  -webkit-overflow-scrolling: touch;
  cursor: grab;
}

.rail__track.is-dragging { cursor: grabbing; scroll-snap-type: none; }

.rail__track > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.rail__track::-webkit-scrollbar { height: 6px; }
.rail__track::-webkit-scrollbar-track { background-color: rgba(108, 122, 140, 0.16); }
.rail__track::-webkit-scrollbar-thumb { background-color: var(--c-steel); }

.rail__item { width: 288px; }

/* --- 15. 标签页 --------------------------------------------------------- */
.tabs__list {
  display: flex;
  gap: 6px;
  border-bottom: 2px solid var(--c-line);
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs__list::-webkit-scrollbar { display: none; }

.tabs__btn {
  position: relative;
  flex: 0 0 auto;
  padding: 13px 19px;
  border: 0;
  background-color: transparent;
  color: var(--c-steel);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--t-fast) ease, background-color var(--t-fast) ease;
}

.tabs__btn:hover { color: var(--c-plateau); background-color: rgba(14, 76, 146, 0.05); }

.tabs__btn[aria-selected="true"] { color: var(--c-plateau); }

.tabs__btn[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3px;
  background-color: var(--c-amber);
}

.tabs__panel { padding-top: 28px; }

/* --- 16. 手风琴 --------------------------------------------------------- */
.accordion { border-top: 1px solid var(--c-line); }

.accordion__item { border-bottom: 1px solid var(--c-line); }

.accordion__trigger {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 21px 4px;
  border: 0;
  background-color: transparent;
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color var(--t-fast) ease;
}

.accordion__trigger:hover,
.accordion__trigger[aria-expanded="true"] { color: var(--c-plateau); }

.accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-left: auto;
}

.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background-color: var(--c-peacock);
}

.accordion__icon::before {
  width: 14px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.accordion__icon::after {
  width: 2px;
  height: 14px;
  transform: translate(-50%, -50%);
  transition: transform var(--t-mid) ease;
}

.accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.accordion__panel {
  height: 0;
  overflow: hidden;
  transition: height var(--t-mid) ease;
}

.accordion__body { padding: 0 4px 24px; }
.accordion__body p { font-size: 15.5px; line-height: 1.8; color: #333F4D; }

/* --- 17. 筛选 chips ----------------------------------------------------- */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  --cut: 9px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 0;
  background-color: var(--c-card);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px var(--c-line);
  transition: background-color var(--t-fast) ease, color var(--t-fast) ease,
    box-shadow var(--t-fast) ease;
}

.chip:hover { box-shadow: inset 0 0 0 1px var(--c-amber); }

.chip[aria-pressed="true"] {
  background-color: var(--c-plateau);
  color: #fff;
  box-shadow: inset 0 0 0 2px var(--c-amber);
}

.chip-group { display: grid; gap: 12px; }

.chip-group__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--c-steel);
}

.filter-count { font-family: var(--font-mono); font-size: 13px; color: var(--c-steel); }

/* --- 18. 数据表 --------------------------------------------------------- */
.data-table {
  width: 100%;
  background-color: var(--c-card);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.data-table th,
.data-table td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid var(--c-line);
  vertical-align: top;
}

.data-table thead th {
  background-color: rgba(14, 76, 146, 0.06);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-steel);
  white-space: nowrap;
}

.data-table tbody tr:hover { background-color: rgba(0, 160, 122, 0.06); }

.data-table td .mono,
.data-table td.mono { font-size: 13.5px; }

/* --- 19. 图片容器 ------------------------------------------------------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background-color: var(--c-plateau);
  isolation: isolate;
}

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(180deg, rgba(14, 76, 146, 0.26), rgba(8, 28, 51, 0.58)),
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
}

.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 16px;
  z-index: 2;
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: #fff;
}

/* --- 20. 复制按钮 ------------------------------------------------------- */
.copy-btn {
  --cut: 7px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border: 0;
  background-color: rgba(0, 160, 122, 0.14);
  color: var(--c-peacock);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background-color var(--t-fast) ease, color var(--t-fast) ease;
}

.copy-btn:hover { background-color: var(--c-peacock); color: #fff; }

.copy-btn[data-copied="ok"] { background-color: var(--c-amber); color: var(--c-night); }
.copy-btn[data-copied="fail"] { background-color: var(--c-coral); color: #fff; }

/* --- 21. 锚点索引 ------------------------------------------------------- */
.anchor-index {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 3px;
}

.anchor-index__link {
  display: block;
  padding: 9px 13px;
  border-left: 2px solid var(--c-line);
  color: var(--c-steel);
  font-size: 13px;
  font-weight: 600;
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease,
    background-color var(--t-fast) ease;
}

.anchor-index__link:hover {
  color: var(--c-plateau);
  border-left-color: var(--c-peacock);
}

.anchor-index__link[aria-current="true"] {
  color: var(--c-plateau);
  background-color: rgba(14, 76, 146, 0.07);
  border-left-color: var(--c-amber);
}

/* --- 22. 对比条 --------------------------------------------------------- */
.compare-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  padding: 12px 0;
  background-color: var(--c-night);
  color: #fff;
  box-shadow: 0 -10px 28px rgba(8, 28, 51, 0.32);
  transform: translateY(115%);
  transition: transform var(--t-mid) ease;
}

.compare-bar[data-visible] { transform: translateY(0); }

.compare-bar__inner {
  --cut: 10px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 10px 18px;
  background-color: rgba(255, 255, 255, 0.06);
}

.compare-bar__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.compare-bar__count { font-family: var(--font-mono); font-size: 12.5px; color: var(--c-amber); }

/* --- 23. 显现动画 ------------------------------------------------------- */
.reveal { opacity: 1; }

html.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

html.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* --- 24. 响应式 --------------------------------------------------------- */
@media (max-width: 1180px) {
  .header-meta { display: none; }
  .header-cta { margin-left: auto; }
}

@media (max-width: 1023px) {
  .grid--12 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .span-3, .span-4, .span-5 { grid-column: span 4; }
  .span-6, .span-7, .span-8, .span-9, .span-10, .span-12 { grid-column: span 8; }

  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col--brand { grid-column: span 3; }
  .region-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 899px) {
  .header-cta { display: none; }
  .nav-toggle { display: inline-flex; margin-left: auto; }

  .nav-bar__inner { display: block; }

  .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    padding-bottom: 10px;
  }

  .site-header[data-open] .nav-list { display: flex; }

  .site-header[data-open] .nav-toggle {
    background-color: var(--c-amber);
    border-color: var(--c-amber);
    color: var(--c-night);
  }

  .nav-link {
    padding: 15px 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    background-color: rgba(14, 76, 146, 0.55);
    border-bottom-color: rgba(255, 176, 33, 0.4);
  }

  .section { padding: 56px 0; }
  .section--wide { padding: 68px 0; }

  .anchor-index { position: static; }
  .compare-bar__inner { border-radius: 0; }
}

@media (max-width: 767px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-col--brand { grid-column: span 2; }
  .region-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-datanote { margin-left: 0; flex-basis: 100%; }
}

@media (max-width: 639px) {
  :root { --gut: 18px; }

  .grid--12 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .span-3, .span-4, .span-5, .span-6, .span-7,
  .span-8, .span-9, .span-10, .span-12 { grid-column: span 4; }

  .header-brandbar__inner { min-height: 68px; gap: 14px; }
  .brand-mark { width: 40px; height: 40px; font-size: 13.5px; }
  .brand-name { font-size: 17px; }
  .brand-tag { font-size: 11px; }

  .site-footer { margin-top: 64px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-col--brand { grid-column: span 1; }
  .rail__item { width: 248px; }

  .accordion__trigger { font-size: 15.5px; }
}

/* --- 25. 动效偏好 ------------------------------------------------------- */
@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.js .reveal { opacity: 1; transform: none; }
  .compare-bar { transition: none; }
  .scroll-progress__bar { transition: none; }
}