/* =========================================================
   最新版体育 · 共享样式 /assets/site.css
   夜赛墨绿 · 沙金 · 落日橙 · 霓虹青
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 148px;
}

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, figcaption, blockquote {
  margin: 0;
}

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

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

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

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

:root {
  /* 主色 */
  --ink-deepest: #07130F;
  --ink: #0B241C;
  --ink-raised: #103025;
  --pitch: #1F6B4A;
  --snow: #F4F7F2;
  --sand: #D8A84E;
  --sand-bright: #E8BB68;
  --dusk: #E2662F;
  --neon: #3FE0D0;
  --gobi: #A8B3AC;
  --dune: #C9B49A;
  --line: #DCE7E4;

  /* 线与面 */
  --hair: rgba(244, 247, 242, 0.14);
  --hair-strong: rgba(244, 247, 242, 0.28);
  --hair-cool: rgba(220, 231, 228, 0.22);
  --veil: rgba(7, 19, 15, 0.94);

  /* 字体 */
  --font-display: "Barlow Condensed", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺寸 */
  --shell: min(1560px, calc(100% - 2.5rem));
  --radius: 18px;
  --radius-sm: 12px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (max-width: 640px) {
  :root { --shell: calc(100% - 1.5rem); }
}

/* ---------------- 基础排版 ---------------- */

body {
  min-height: 100%;
  background-color: var(--ink);
  background-image:
    radial-gradient(1200px 620px at 92% -10%, rgba(216, 168, 78, 0.12), transparent 62%),
    radial-gradient(900px 560px at -8% 104%, rgba(31, 107, 74, 0.45), transparent 68%),
    linear-gradient(180deg, var(--ink-deepest) 0%, var(--ink) 40%, var(--ink) 100%);
  background-attachment: fixed;
  color: var(--line);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (max-width: 640px) {
  body { font-size: 16px; background-attachment: scroll; }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--snow);
}

h1 { font-size: clamp(2.4rem, 5.4vw, 5.5rem); }
h2 { font-size: clamp(1.7rem, 3.1vw, 3rem); }
h3 { font-size: clamp(1.25rem, 1.9vw, 1.8rem); }
h4 { font-size: clamp(1.05rem, 1.4vw, 1.3rem); }

p { text-wrap: pretty; }

strong { color: var(--snow); font-weight: 700; }

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

/* ---------------- 无障碍 ---------------- */

.us-sr-only {
  position: absolute;
  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;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------------- 头部 ---------------- */

.us-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: var(--veil);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hair);
  color: var(--snow);
  transition: background 0.25s var(--ease);
}

.us-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--sand) 0%, var(--dusk) 32%, var(--pitch) 68%, transparent 100%);
  pointer-events: none;
}

.us-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background-image: repeating-linear-gradient(90deg, var(--hair-strong) 0 1px, transparent 1px 26px);
  opacity: 0.55;
  pointer-events: none;
}

.skip-link {
  position: absolute;
  top: -120px;
  left: 1rem;
  z-index: 140;
  display: inline-block;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  background: var(--sand);
  color: var(--ink-deepest);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: top 0.2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 0.7rem;
  outline-offset: 3px;
}

/* 刊头 */
.us-masthead {
  width: var(--shell);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1.25rem;
  padding: 1.05rem 0 1.15rem;
  position: relative;
}

.us-masthead__brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.35rem 0.9rem 0.35rem 0.35rem;
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.us-masthead__brand:hover {
  border-color: var(--sand);
  background: rgba(216, 168, 78, 0.08);
}

.us-seal {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(from 200deg, var(--sand), var(--dusk) 52%, var(--sand));
  color: var(--ink-deepest);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0;
  flex: none;
}

.us-masthead__brandtext {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.us-masthead__brandline {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--line);
}

.us-masthead__brandline--sub {
  font-size: 0.64rem;
  letter-spacing: 0.22em;
  color: var(--gobi);
}

.us-masthead__center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  text-align: center;
}

.us-wordmark {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.5vw, 2.3rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.14em;
  color: var(--snow);
  transition: font-size 0.25s var(--ease), color 0.2s var(--ease);
}

.us-wordmark:hover { color: var(--sand); }

.us-wordmark::after {
  content: "";
  display: block;
  height: 3px;
  margin-top: 0.4rem;
  background: linear-gradient(90deg, var(--sand) 0%, var(--dusk) 62%, transparent 100%);
  transition: height 0.25s var(--ease), margin-top 0.25s var(--ease);
}

.us-masthead__season {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--gobi);
}

.us-masthead__meta {
  justify-self: end;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.2rem;
  text-align: right;
}

.us-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.us-status__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 3px rgba(63, 224, 208, 0.18);
  animation: us-pulse 3.2s ease-in-out infinite;
  flex: none;
}

.us-status__text { white-space: nowrap; }

.us-masthead__metasub {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--gobi);
}

@keyframes us-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.42; }
}

/* 移动导航按钮 */
.us-nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.95rem 0.5rem 0.75rem;
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
  color: var(--snow);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  cursor: pointer;
  min-height: 44px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.us-nav-toggle:hover {
  border-color: var(--sand);
  background: rgba(216, 168, 78, 0.08);
}

.us-nav-toggle__bars {
  display: grid;
  gap: 4px;
}

.us-nav-toggle__bars span {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--sand);
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}

/* 导航 */
.us-nav {
  width: var(--shell);
  margin-inline: auto;
  padding: 0.1rem 0 1rem;
}

.us-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.2rem 1.75rem;
  border-top: 1px solid var(--hair);
  padding-top: 0.8rem;
}

.us-nav__item { list-style: none; }

.us-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.4rem 0.15rem;
  font-size: 0.92rem;
  letter-spacing: 0.1em;
  color: var(--line);
  transition: color 0.2s var(--ease);
}

.us-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--sand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease);
}

.us-nav__link:hover { color: var(--snow); }

.us-nav__link:hover::after,
.us-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.us-nav__link[aria-current="page"] { color: var(--sand); }

.us-nav__index {
  display: inline-block;
  margin-right: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0;
  color: var(--gobi);
}

.us-nav__link[aria-current="page"] .us-nav__index { color: var(--dusk); }

/* 紧凑刊头 */
.us-header.is-compact .us-masthead {
  padding-top: 0.5rem;
  padding-bottom: 0.55rem;
}

.us-header.is-compact .us-wordmark { font-size: 1.35rem; }

.us-header.is-compact .us-wordmark::after {
  height: 2px;
  margin-top: 0.25rem;
}

.us-header.is-compact .us-masthead__season { display: none; }

.us-header.is-compact .us-nav { padding-bottom: 0.7rem; }

/* ---------------- 页脚 ---------------- */

.us-footer {
  position: relative;
  margin-top: clamp(4rem, 9vw, 8rem);
  background: linear-gradient(180deg, var(--ink-deepest) 0%, #050D0A 92%);
  border-top: 1px solid var(--hair-strong);
  color: var(--line);
}

.us-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background-image: repeating-linear-gradient(90deg, var(--sand) 0 42px, transparent 42px 86px);
  opacity: 0.5;
  pointer-events: none;
}

.us-footer__inner {
  width: var(--shell);
  margin-inline: auto;
  padding: clamp(2.5rem, 5vw, 4.25rem) 0 1.6rem;
}

.us-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.45fr;
  gap: clamp(1.5rem, 3vw, 3rem);
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--hair);
}

.us-footer__brandcol { display: flex; flex-direction: column; align-items: flex-start; }

.us-footer__brand {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.3vw, 1.95rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.12em;
  color: var(--snow);
}

.us-footer__tag {
  margin-top: 0.7rem;
  max-width: 22em;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--gobi);
}

.us-footer__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.1rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid rgba(63, 224, 208, 0.35);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.us-footer__col { display: flex; flex-direction: column; }

.us-footer__title {
  margin-bottom: 1rem;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--dune);
}

.us-footer__list { display: grid; gap: 0.6rem; }

.us-footer__link {
  position: relative;
  display: inline-block;
  font-size: 0.92rem;
  color: var(--line);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.us-footer__link:hover {
  color: var(--sand);
  transform: translateX(3px);
}

.us-contact-list { display: grid; gap: 1rem; }

.us-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.15rem 0.6rem;
}

.us-contact__label {
  grid-column: 1 / -1;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: var(--gobi);
}

.us-contact__value {
  grid-column: 1;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--snow);
  overflow-wrap: anywhere;
}

.us-contact__value--addr {
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--line);
}

.us-copy {
  grid-column: 2;
  align-self: center;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--gobi);
  cursor: pointer;
  min-height: 28px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.us-copy:hover {
  background: var(--sand);
  border-color: var(--sand);
  color: var(--ink-deepest);
}

.us-copy[data-copied="true"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink-deepest);
}

.us-contact__note {
  margin-top: 1rem;
  font-size: 0.76rem;
  line-height: 1.7;
  color: var(--gobi);
}

.us-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem 1.5rem;
  padding-top: 1.5rem;
}

.us-footer__legal {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  color: var(--gobi);
}

.us-footer__legalnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
}

.us-footer__legalnav a {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--gobi);
  transition: color 0.2s var(--ease);
}

.us-footer__legalnav a:hover { color: var(--sand); }

/* ---------------- 容器与章节 ---------------- */

.us-container {
  width: var(--shell);
  margin-inline: auto;
}

.us-section {
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.us-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.us-section__title {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  color: var(--snow);
}

.us-section__lead {
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--gobi);
}

.us-divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--hair-strong), transparent 82%);
  margin-block: clamp(1.5rem, 3vw, 2.5rem);
}

/* ---------------- 正文 ---------------- */

.us-prose {
  max-width: 72ch;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--line);
}

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

.us-prose h2,
.us-prose h3 { margin-top: 1.9em; color: var(--snow); }

.us-prose h2 { font-size: clamp(1.45rem, 2.4vw, 2rem); }
.us-prose h3 { font-size: clamp(1.15rem, 1.7vw, 1.4rem); }

.us-prose a {
  color: var(--sand);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.us-prose a:hover { color: var(--sand-bright); }

.us-prose ul,
.us-prose ol {
  padding-left: 1.3em;
  list-style: none;
}

.us-prose ul li,
.us-prose ol li { position: relative; padding-left: 0.6em; }

.us-prose ul li::before {
  content: "";
  position: absolute;
  left: -0.6em;
  top: 0.78em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sand);
}

.us-prose ol { counter-reset: us-ol; }
.us-prose ol li { counter-increment: us-ol; }

.us-prose ol li::before {
  content: counter(us-ol, decimal-leading-zero);
  position: absolute;
  left: -1.4em;
  top: 0.1em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--neon);
}

.us-prose blockquote {
  padding: 1rem 1.3rem;
  border-left: 3px solid var(--sand);
  background: rgba(31, 107, 74, 0.16);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--line);
}

/* ---------------- 按钮 ---------------- */

.us-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.85rem 1.6rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.us-btn:active { transform: translateY(1px); }

.us-btn--gold {
  background: var(--sand);
  color: var(--ink-deepest);
}

.us-btn--gold:hover { background: var(--sand-bright); }

.us-btn--dusk {
  background: var(--dusk);
  color: var(--ink-deepest);
}

.us-btn--dusk:hover { background: #F07A44; }

.us-btn--ghost {
  background: transparent;
  border-color: var(--hair-strong);
  color: var(--snow);
}

.us-btn--ghost:hover {
  border-color: var(--sand);
  color: var(--sand);
}

.us-btn--sm {
  min-height: 36px;
  padding: 0.55rem 1rem;
  font-size: 0.76rem;
}

/* ---------------- 标签与数字 ---------------- */

.us-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--sand);
}

.us-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: 0.75;
}

.us-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--neon);
}

.us-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.7rem;
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--line);
  background: rgba(31, 107, 74, 0.16);
}

.us-tag--gold {
  border-color: rgba(216, 168, 78, 0.45);
  color: var(--sand);
  background: rgba(216, 168, 78, 0.1);
}

.us-tag--neon {
  border-color: rgba(63, 224, 208, 0.4);
  color: var(--neon);
  background: rgba(63, 224, 208, 0.08);
}

/* ---------------- 面包屑 ---------------- */

.us-breadcrumb {
  margin-top: 1.35rem;
}

.us-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem 0;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--gobi);
}

.us-breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.us-breadcrumb li + li::before {
  content: "/";
  margin: 0 0.55rem;
  color: rgba(168, 179, 172, 0.5);
}

.us-breadcrumb a { color: var(--gobi); transition: color 0.2s var(--ease); }
.us-breadcrumb a:hover { color: var(--sand); }
.us-breadcrumb [aria-current="page"] { color: var(--line); }

/* ---------------- 栅格与卡片 ---------------- */

.us-grid {
  display: grid;
  gap: clamp(1rem, 2vw, 1.75rem);
}

.us-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.us-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.us-grid--asym { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.6fr); }

.us-card {
  position: relative;
  padding: clamp(1.1rem, 2vw, 1.75rem);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(31, 107, 74, 0.22) 0%, rgba(11, 36, 28, 0.72) 100%);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.us-card:hover {
  border-color: rgba(216, 168, 78, 0.42);
  transform: translateY(-2px);
}

/* ---------------- 图片容器 ---------------- */

.us-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background:
    linear-gradient(155deg, #14382B 0%, #07130F 74%),
    repeating-linear-gradient(90deg, rgba(244, 247, 242, 0.05) 0 1px, transparent 1px 22px);
  aspect-ratio: 16 / 9;
}

.us-media--wide { aspect-ratio: 21 / 9; }
.us-media--tall { aspect-ratio: 4 / 5; }
.us-media--square { aspect-ratio: 1 / 1; }

.us-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.us-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(244, 247, 242, 0.1);
  border-radius: inherit;
  pointer-events: none;
}

.us-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.us-figure__caption {
  font-size: 0.78rem;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--gobi);
}

.us-figure__caption .us-num { font-size: 0.8rem; }

/* ---------------- 筛选 ---------------- */

.us-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.us-filter__btn {
  min-height: 38px;
  padding: 0.5rem 1.05rem;
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--line);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease);
}

.us-filter__btn:hover {
  border-color: var(--sand);
  color: var(--sand);
}

.us-filter__btn[aria-pressed="true"] {
  background: var(--sand);
  border-color: var(--sand);
  color: var(--ink-deepest);
  font-weight: 700;
}

[data-filter-item][hidden] { display: none !important; }

/* ---------------- 滚动显现 ---------------- */

.us-js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.us-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 1080px) {
  .us-footer__grid { grid-template-columns: 1.3fr 1fr 1.1fr; }
  .us-footer__brandcol { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 96px; }

  .us-masthead {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 0.6rem;
    padding: 0.65rem 0;
  }

  .us-masthead__brand { grid-column: 1; padding-right: 0.35rem; }
  .us-masthead__center { grid-column: 2; align-items: flex-start; text-align: left; }
  .us-masthead__meta { display: none; }
  .us-nav-toggle { display: inline-flex; grid-column: 3; justify-self: end; }
  .us-wordmark { font-size: 1.4rem; }
  .us-wordmark::after { margin-top: 0.28rem; }

  .us-nav {
    display: none;
    padding-bottom: 1rem;
  }

  .us-header[data-open="true"] .us-nav { display: block; }

  .us-nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding-top: 0.4rem;
  }

  .us-nav__link {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0.85rem 0.25rem;
    font-size: 1.02rem;
    border-bottom: 1px solid var(--hair);
  }

  .us-nav__link::after {
    left: 0;
    right: auto;
    top: 0.55rem;
    bottom: 0.55rem;
    height: auto;
    width: 3px;
    transform: scaleY(0);
    transform-origin: top center;
  }

  .us-nav__link:hover::after,
  .us-nav__link[aria-current="page"]::after { transform: scaleY(1); }

  .us-nav__index { font-size: 0.7rem; margin-right: 0.6rem; }

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

  .us-header.is-compact .us-wordmark { font-size: 1.25rem; }

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

@media (max-width: 760px) {
  .us-footer__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .us-masthead__brandtext { display: none; }
  .us-masthead__brand { padding: 0.3rem; }
  .us-wordmark { letter-spacing: 0.1em; }
  .us-masthead__season { font-size: 0.64rem; letter-spacing: 0.14em; }

  .us-footer__bottom { flex-direction: column; align-items: flex-start; }
  .us-legal, .us-footer__legal { font-size: 0.72rem; }
}

/* ---------------- 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;
  }

  .us-js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .us-status__dot { animation: none; }
}