/* ==========================================================================
   微玩体育合作 · 共享样式 /assets/site.css
   展览画册式布局 · 主客场双色叙事 · 档案卡信息系统
   ========================================================================== */

/* 1. 设计令牌 ------------------------------------------------------------- */
:root {
  --sand: #F3EDE4;
  --clay: #B5432A;
  --clay-soft: #E8C3B6;
  --rock: #2B2A28;
  --slate: #445059;
  --ink: #16181A;
  --gold: #D89B3C;
  --neon: #7CE0A8;
  --stone: #6E6B66;
  --paper: #FFFDF9;

  /* 主客场模式令牌（默认主场） */
  --accent: #B5432A;
  --accent-soft: #E8C3B6;
  --accent-deep: #8E3220;
  --accent-live: #D89B3C;

  --hairline: rgba(43, 42, 40, 0.14);
  --hairline-strong: rgba(43, 42, 40, 0.28);
  --on-dark: rgba(255, 253, 249, 0.78);
  --on-dark-soft: rgba(255, 253, 249, 0.58);

  --font-display: "Oswald", "Arial Narrow", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-num: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius-lg: 28px;
  --radius-md: 22px;
  --radius-pill: 999px;
  --shell: 1320px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
}

/* 客场模式：冷峻色阶 */
html[data-mode="away"] {
  --accent: #445059;
  --accent-soft: #CBD3D6;
  --accent-deep: #2B2A28;
  --accent-live: #7CE0A8;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 8.5rem;
}

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { 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; cursor: pointer; }
table { border-collapse: collapse; }
input, select, textarea { font: inherit; color: inherit; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* 3. 中文排版与页面基底 ---------------------------------------------------- */
body {
  background: var(--sand);
  color: var(--rock);
  font-family: var(--font-body);
  font-size: clamp(16.5px, 0.4vw + 15.2px, 18px);
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.4s ease, color 0.4s ease;
}

#main-content { scroll-margin-top: 8rem; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--ink);
}

::selection { background: var(--accent); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--accent-live);
  outline-offset: 2px;
  border-radius: 8px;
}

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

/* 4. 跳转链接 ------------------------------------------------------------ */
.skip-link {
  position: fixed;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  padding: 0.7rem 1.4rem;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  transition: top 0.2s ease;
}
.skip-link:focus,
.skip-link:focus-visible { top: 0.75rem; }

/* 5. 页头：居中刊头 ------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(243, 237, 228, 0.95);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--hairline);
  transition: box-shadow 0.3s ease, background-color 0.4s ease, border-color 0.4s ease;
}
.site-header[data-shrunk="true"] { box-shadow: 0 14px 34px rgba(22, 24, 26, 0.1); }

.site-header__progress {
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--accent), var(--accent-live));
  transition: transform 0.12s linear, background 0.4s ease;
}

.header-bar {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 1.15rem var(--gutter) 0.85rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  transition: padding 0.3s ease;
}
.site-header[data-shrunk="true"] .header-bar { padding-top: 0.55rem; padding-bottom: 0.4rem; }

.header-bar__side {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}
.header-bar__side--start { grid-column: 1; justify-content: flex-start; }
.header-bar__side--end { grid-column: 3; justify-content: flex-end; }

.masthead {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  text-align: center;
}
.masthead__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.masthead__mark {
  font-family: var(--font-num);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--paper);
  transition: background-color 0.4s ease, color 0.4s ease;
}
.masthead__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--ink);
  transition: color 0.4s ease;
}
.masthead__line {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--stone);
  max-height: 3rem;
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
}
.site-header[data-shrunk="true"] .masthead__line {
  max-height: 0;
  opacity: 0;
  transform: translateY(-4px);
}

/* 主客场配色开关 */
.mode-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem 0.85rem 0.42rem 0.5rem;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--rock);
  white-space: nowrap;
  transition: border-color 0.2s ease, background-color 0.3s ease;
}
.mode-switch:hover { border-color: var(--accent); }
.mode-switch__dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(181, 67, 42, 0.14);
  transition: background-color 0.4s ease, box-shadow 0.4s ease;
}
html[data-mode="away"] .mode-switch__dot { box-shadow: 0 0 0 4px rgba(68, 80, 89, 0.18); }
.mode-switch__label { line-height: 1; }
.mode-switch[aria-pressed="true"] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-deep);
}

/* 赛季切换 */
.season-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.45rem;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-pill);
  transition: border-color 0.4s ease;
}
.season-switch__label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--stone);
  padding-left: 0.35rem;
}
.season-switch__btn {
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1rem;
  line-height: 1;
  color: var(--rock);
  transition: background-color 0.2s ease, color 0.2s ease;
}
.season-switch__btn:hover { background: var(--accent-soft); color: var(--accent-deep); }
.season-switch__value {
  font-family: var(--font-num);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  min-width: 6.8rem;
  text-align: center;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--rock);
}
.nav-toggle__icon {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
}
.nav-toggle__bar {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: transform 0.22s ease, background-color 0.4s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child { transform: translateY(-3px) rotate(-45deg); }
.nav-toggle__label { line-height: 1; }

/* 主导航 */
.site-nav {
  display: block;
  padding: 0 var(--gutter);
  border-top: 1px solid var(--hairline);
  transition: border-color 0.4s ease, background-color 0.4s ease;
}
.site-nav__list {
  max-width: var(--shell);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.15rem 0.4rem;
  padding: 0.5rem 0;
}
.site-nav__item { display: contents; }
.site-nav__link {
  display: inline-block;
  padding: 0.48rem 0.95rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--rock);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.site-nav__link:hover {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
  color: var(--accent-deep);
}
.site-nav__link[aria-current="page"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
}

@keyframes nav-reveal {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* 6. 页脚：深色数据座 ---------------------------------------------------- */
.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  padding: clamp(2.4rem, 5vw, 4rem) var(--gutter) 1.7rem;
  background: var(--ink);
  color: var(--paper);
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
}
.site-footer__top {
  max-width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.6fr 1fr;
  gap: 2rem 2.2rem;
  padding-bottom: 2.2rem;
  border-bottom: 1px solid rgba(255, 253, 249, 0.16);
}
.footer-brand { display: flex; flex-direction: column; }
.footer-brand__mark {
  align-self: flex-start;
  font-family: var(--font-num);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--paper);
  margin-bottom: 0.75rem;
  transition: background-color 0.4s ease;
}
.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.45rem;
  letter-spacing: 0.05em;
  color: var(--paper);
}
.footer-brand__note {
  margin-top: 0.55rem;
  font-size: 0.9rem;
  color: var(--on-dark);
}
.footer-brand__meta {
  margin-top: 0.4rem;
  font-size: 0.78rem;
  color: var(--stone);
}
.footer-col { display: flex; flex-direction: column; }
.footer-col__title {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 0.9rem;
}
.footer-col__list { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col__list--plain { gap: 0.5rem; }
.footer-col--contact .footer-text { overflow-wrap: anywhere; }
.footer-link {
  display: inline-block;
  font-size: 0.92rem;
  color: var(--on-dark);
  transition: color 0.2s ease, transform 0.2s ease;
}
.footer-link:hover { color: var(--accent-live); transform: translateX(2px); }
.footer-link--cta {
  margin-top: 0.35rem;
  padding: 0.42rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 253, 249, 0.28);
  color: var(--paper);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}
.footer-link--cta:hover {
  border-color: var(--accent-live);
  transform: none;
}
.footer-text {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--on-dark-soft);
}
.site-footer__bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem 1.2rem;
}
.footer-copy {
  font-family: var(--font-num);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--on-dark-soft);
}
.footer-copy--muted { color: var(--stone); }

/* 7. 通用容器与正文 ------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: 860px; }
.container--wide { max-width: 1560px; }

.prose {
  max-width: 44em;
  font-size: 1.02em;
  line-height: 1.85;
  color: var(--rock);
}
.prose p + p { margin-top: 1.05em; }
.prose h2 { font-size: clamp(1.4rem, 2.2vw, 1.9rem); margin: 1.8em 0 0.6em; }
.prose h3 { font-size: clamp(1.15rem, 1.6vw, 1.4rem); margin: 1.5em 0 0.5em; }
.prose ul, .prose ol { margin: 0.9em 0 0.9em 1.2em; display: flex; flex-direction: column; gap: 0.4em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose strong { color: var(--accent); font-weight: 700; }
.prose a { color: var(--accent); border-bottom: 1px solid var(--accent-soft); }

/* 8. 章节头 -------------------------------------------------------------- */
.section { padding-block: clamp(2.4rem, 6vw, 4.6rem); }
.section__head {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  max-width: 54em;
  margin-bottom: clamp(1.4rem, 3vw, 2.4rem);
}
.section__no {
  font-family: var(--font-num);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--accent);
}
.section__title {
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  color: var(--ink);
}
.section__lead {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--rock);
  max-width: 44em;
}

/* 9. 斜切分隔 ------------------------------------------------------------ */
.slant-divider {
  position: relative;
  height: clamp(36px, 7vw, 90px);
  overflow: hidden;
}
.slant-divider::before,
.slant-divider::after {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  height: 2px;
}
.slant-divider::before {
  top: 46%;
  transform: rotate(-2deg);
  background: linear-gradient(90deg, var(--accent), transparent 72%);
}
.slant-divider::after {
  top: calc(46% + 16px);
  transform: rotate(1.6deg);
  opacity: 0.5;
  background: linear-gradient(90deg, var(--accent-live), transparent 60%);
}

/* 10. 网格 --------------------------------------------------------------- */
.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.8rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* 11. 档案卡 ------------------------------------------------------------- */
.archive-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.4rem 1.5rem 1.6rem;
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease, background-color 0.4s ease;
}
.archive-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--accent);
  transform: scaleY(0.35);
  transform-origin: top;
  transition: transform 0.3s ease, background-color 0.4s ease;
}
.archive-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-soft);
  box-shadow: 0 18px 40px rgba(22, 24, 26, 0.1);
}
.archive-card:hover::before { transform: scaleY(1); }
.archive-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}
.archive-card__no {
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.archive-card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.12rem;
  letter-spacing: 0.01em;
  line-height: 1.35;
  color: var(--ink);
}
.archive-card__body {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--rock);
}
.archive-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}

/* 12. 标签与数字 ---------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.72rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--hairline);
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.5;
  transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}
.tag--gold { background: rgba(216, 155, 60, 0.2); color: #8A5C10; }
.tag--stone { background: rgba(110, 107, 102, 0.14); color: var(--rock); }
.tag--live { background: rgba(124, 224, 168, 0.24); color: #1F6B45; }

.stat { display: flex; flex-direction: column; gap: 0.25rem; }
.stat__value {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  transition: color 0.4s ease;
}
.stat__label {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--stone);
}

/* 13. 按钮 --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.45rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.4;
  transition: transform 0.18s ease, background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
.btn--primary { background: var(--accent); color: var(--paper); }
.btn--primary:hover { background: var(--accent-deep); transform: translateY(-2px); }
.btn--ghost { border-color: var(--hairline-strong); color: var(--rock); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn--quiet { background: var(--accent-soft); color: var(--accent-deep); }
.btn--quiet:hover { transform: translateY(-2px); }

/* 14. 面包屑 ------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.2rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--stone);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 0.4rem; }
.breadcrumb__link { color: var(--stone); border-bottom: 1px solid transparent; transition: color 0.2s ease, border-color 0.2s ease; }
.breadcrumb__link:hover { color: var(--accent); border-color: var(--accent); }
.breadcrumb__sep { opacity: 0.6; }
.breadcrumb__current { color: var(--rock); font-weight: 600; }

/* 15. 图片容器 ----------------------------------------------------------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent-soft) 0%, rgba(43, 42, 40, 0.08) 100%);
  aspect-ratio: 16 / 10;
  isolation: isolate;
  transition: background 0.4s ease;
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(43, 42, 40, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 42, 40, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.media-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--slant { clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%); }
.media-frame__body {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.1rem;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--rock);
}
.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  padding: 1.4rem 1.1rem 0.9rem;
  background: linear-gradient(0deg, rgba(22, 24, 26, 0.8), transparent);
  color: var(--paper);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

/* 16. 滚动显现 ----------------------------------------------------------- */
.js .reveal,
.js [data-observe] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.js .reveal.is-visible,
.js [data-observe].is-visible {
  opacity: 1;
  transform: none;
}

/* 17. 响应式 ------------------------------------------------------------- */
@media (max-width: 1100px) {
  .site-footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .header-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.7rem;
    padding: 0.8rem clamp(0.9rem, 4vw, 1.6rem) 0.55rem;
  }
  .masthead {
    order: 1;
    flex: 1 1 55%;
    align-items: flex-start;
    text-align: left;
    gap: 0.25rem;
  }
  .masthead__name { font-size: 1.45rem; }
  .masthead__line { font-size: 0.7rem; letter-spacing: 0.04em; }
  .nav-toggle { order: 2; display: inline-flex; }
  .header-bar__side--start { order: 3; flex: 1 1 auto; }
  .header-bar__side--end { order: 4; flex: 0 0 auto; }

  .site-nav {
    display: none;
    padding: 0 clamp(0.9rem, 4vw, 1.6rem);
    background: rgba(243, 237, 228, 0.98);
  }
  .site-nav[data-open="true"] { display: block; animation: nav-reveal 0.24s ease both; }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0.15rem;
    padding: 0.55rem 0 0.95rem;
  }
  .site-nav__link {
    display: block;
    border-radius: 14px;
    padding: 0.7rem 0.9rem;
    font-size: 0.95rem;
  }
}

@media (max-width: 620px) {
  .masthead__line { display: none; }
  .season-switch__label { display: none; }
  .season-switch__value { min-width: 5.6rem; font-size: 0.76rem; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .site-footer__top { grid-template-columns: minmax(0, 1fr); gap: 1.7rem; }
  .site-footer__bottom { flex-direction: column; }
}

/* 18. 降低动效 ----------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .js .reveal,
  .js [data-observe] {
    opacity: 1 !important;
    transform: none !important;
  }
  .archive-card:hover { transform: none; }
  .btn:hover { transform: none; }
}