/* =========================================================
   /assets/site.css — 平博赛事 全站共享样式
   1 重置与令牌 / 2 中文排版 / 3 通用组件 / 4 报头 / 5 页脚 / 6 响应式与动效
   ========================================================= */

/* ---------- 1. 重置与令牌 ---------- */
*, *::before, *::after { box-sizing: border-box; }

:root {
  --c-green-900: #061C16;
  --c-green-800: #0B3B2E;
  --c-green-700: #14523F;
  --c-green-500: #2E7D5B;
  --c-orange: #FF6A2B;
  --c-orange-700: #C94A18;
  --c-blue: #2F6BFF;
  --c-blue-200: #B9D4FF;
  --c-gold: #E8B14A;
  --c-gold-ink: #8A6415;
  --c-snow: #F7FAF8;
  --c-paper: #EFF3EE;
  --c-gray: #4A5A54;

  --line: rgba(46, 125, 91, .42);
  --line-soft: rgba(46, 125, 91, .20);
  --line-light: rgba(247, 250, 248, .30);
  --paper-shadow: 7px 7px 0 0 rgba(20, 82, 63, .13);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: var(--font-display);
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "DejaVu Sans Mono", "Courier New", monospace;

  --container: 1180px;
  --nav-h: 58px;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  margin: 0;
  background-color: var(--c-paper);
  background-image:
    linear-gradient(180deg, rgba(46, 125, 91, .07) 0, rgba(46, 125, 91, 0) 320px),
    repeating-linear-gradient(90deg, rgba(46, 125, 91, .045) 0 1px, transparent 1px 96px);
  color: var(--c-gray);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

img, svg, video { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; }
p, figure, blockquote { margin: 0; }
a { color: inherit; }
hr { border: 0; }

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

/* ---------- 2. 中文排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  color: var(--c-green-800);
  line-height: 1.24;
  letter-spacing: -.01em;
  margin: 0;
}
h1 { font-size: clamp(1.9rem, 4.4vw, 2.75rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.75rem); }
h4 { font-size: clamp(1.05rem, 1.7vw, 1.375rem); }

p { text-wrap: pretty; }
strong { color: var(--c-green-800); }

.mono,
[data-year],
.data-table__num,
.price,
.price__value,
.price__unit,
.stat__value,
.timeline__time,
.footer-bar,
.breadcrumb__item {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--c-green-500);
  margin-bottom: .55rem;
}

.lede { font-size: clamp(1.02rem, 1.5vw, 1.18rem); line-height: 1.8; color: var(--c-gray); }
.muted { color: var(--c-green-500); }

/* ---------- 3. 通用组件 ---------- */
.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

.section { padding-block: clamp(2.25rem, 5vw, 4rem); }
.section--tight { padding-block: clamp(1.4rem, 3vw, 2.4rem); }

.stack > * + * { margin-top: 1.1rem; }
.stack--tight > * + * { margin-top: .6rem; }

/* 章节头 */
.section-head {
  display: grid;
  gap: .5rem;
  padding-bottom: 1rem;
  margin-bottom: 1.6rem;
  border-bottom: 1px solid var(--line);
}
.section-head__en {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--c-green-500);
}
.section-head__title {
  position: relative;
  padding-bottom: .55rem;
  font-size: clamp(1.5rem, 3vw, 2.15rem);
}
.section-head__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 6px;
  background: var(--c-orange);
}
.section-head__desc { font-size: 16px; color: var(--c-gray); max-width: 68ch; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: .04em;
  text-decoration: none;
  padding: .95rem 1.35rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease,
              transform .18s ease, box-shadow .18s ease;
}
.btn--sm { font-size: 14px; padding: .7rem 1rem; }
.btn--primary {
  background: var(--c-orange);
  color: #221005;
  box-shadow: 0 5px 0 0 var(--c-orange-700);
}
.btn--primary:hover { background: #FF8351; transform: translateY(-2px); box-shadow: 0 7px 0 0 var(--c-orange-700); }
.btn--primary:active { transform: translateY(3px); box-shadow: 0 2px 0 0 var(--c-orange-700); }
.btn--ghost { background: transparent; color: var(--c-snow); border-color: var(--line-light); }
.btn--ghost:hover { border-color: var(--c-orange); color: var(--c-orange); }
.btn--solid { background: var(--c-green-800); color: var(--c-snow); }
.btn--solid:hover { background: var(--c-green-700); }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1;
  padding: .45rem .6rem;
  background: rgba(255, 106, 43, .14);
  color: var(--c-orange);
  border: 1px solid rgba(255, 106, 43, .5);
}
.tag--cut {
  padding-right: .85rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}
.tag--quiet { background: rgba(185, 212, 255, .1); color: var(--c-blue-200); border-color: rgba(185, 212, 255, .42); }
.tag--blue { background: rgba(47, 107, 255, .1); color: #1F4FD0; border-color: rgba(47, 107, 255, .38); }
.tag--gold { background: rgba(232, 177, 74, .18); color: var(--c-gold-ink); border-color: rgba(232, 177, 74, .6); }

/* 纸张卡片 */
.paper-card {
  position: relative;
  background: var(--c-snow);
  border: 1px solid var(--line);
  box-shadow: var(--paper-shadow);
  padding: 1.4rem;
}
.paper-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
  padding-bottom: .8rem;
  margin-bottom: .9rem;
  border-bottom: 1px dashed var(--line);
}
.paper-card__body { font-size: 16px; }
.paper-card__body > * + * { margin-top: .8rem; }

/* 数据看板 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.stat { background: var(--c-snow); padding: 1rem 1.1rem; }
.stat__value {
  display: block;
  font-size: clamp(1.7rem, 3.6vw, 2.4rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-blue);
}
.stat__label {
  display: block;
  margin-top: .35rem;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-green-500);
}

/* 表格 */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--c-snow);
  border: 1px solid var(--line);
  font-size: 15px;
}
.data-table th,
.data-table td { padding: .7rem .85rem; text-align: left; border-bottom: 1px solid var(--line-soft); }
.data-table thead th {
  background: var(--c-green-800);
  color: var(--c-snow);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
  border-bottom: 0;
}
.data-table tbody tr:nth-child(even) { background: var(--c-paper); }
.data-table__num { text-align: right; color: var(--c-green-700); font-weight: 700; }

/* 价格 / 费用 */
.price {
  display: inline-flex;
  align-items: baseline;
  gap: .35rem;
  color: var(--c-gold);
  border-bottom: 2px dashed rgba(232, 177, 74, .7);
  padding-bottom: .12rem;
}
.price__value { font-size: 1.5rem; font-weight: 700; line-height: 1; }
.price__unit { font-size: 12px; letter-spacing: .08em; color: rgba(232, 177, 74, .88); }
.price--on-light { color: var(--c-gold-ink); border-bottom-color: rgba(138, 100, 21, .5); }
.price--on-light .price__unit { color: rgba(138, 100, 21, .8); }

/* 图容器（页面阶段放置图片用） */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, var(--c-green-700) 0%, var(--c-green-800) 48%, var(--c-green-900) 100%);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(70% 55% at 78% 18%, rgba(47, 107, 255, .35), transparent 70%),
    radial-gradient(55% 45% at 12% 92%, rgba(46, 125, 91, .55), transparent 72%),
    linear-gradient(115deg, rgba(255, 106, 43, .30) 0 2px, transparent 2px 100%);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__img { width: 100%; height: 100%; object-fit: cover; }
.figure { display: grid; gap: .6rem; }
.figure__caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-green-500);
}

/* 时间轴 */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.7rem;
  border-left: 2px dashed var(--c-green-500);
}
.timeline__item { position: relative; padding-bottom: 1.5rem; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -2.03rem;
  top: .55rem;
  width: 12px;
  height: 12px;
  background: var(--c-orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 43, .18);
}
.timeline__time {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--c-gold-ink);
}
.timeline__title { display: block; font-weight: 800; color: var(--c-green-800); margin-top: .2rem; }
.timeline__body { font-size: 15px; margin-top: .3rem; }

/* 标签页 */
.tabs { display: block; }
.tabs__list {
  display: flex;
  flex-wrap: nowrap;
  gap: .3rem;
  overflow-x: auto;
  padding-bottom: 0;
  border-bottom: 2px solid var(--line);
  scrollbar-width: thin;
}
.tabs__tab {
  flex: 0 0 auto;
  appearance: none;
  background: transparent;
  border: 1px solid var(--line);
  border-bottom: 0;
  color: var(--c-green-700);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  padding: .7rem .95rem;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}
.tabs__tab:hover { background: rgba(255, 106, 43, .1); }
.tabs__tab[aria-selected="true"] {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: #221005;
}
.tabs__panel { padding-top: 1.25rem; }
.tabs__panel[hidden] { display: none; }

/* 折叠 */
.fold {
  background: var(--c-snow);
  border: 1px solid var(--line);
}
.fold + .fold { margin-top: .75rem; }
.fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  font-weight: 800;
  color: var(--c-green-800);
  cursor: pointer;
  list-style: none;
}
.fold__summary::-webkit-details-marker { display: none; }
.fold__summary::after {
  content: "＋";
  font-family: var(--font-mono);
  color: var(--c-orange);
}
.fold[open] .fold__summary::after { content: "－"; }
.fold__body {
  padding: .9rem 1.1rem 1.1rem;
  border-top: 1px dashed var(--line);
  font-size: 16px;
}
.fold__body > * + * { margin-top: .8rem; }

/* 面包屑 */
.breadcrumb { padding-block: 1rem; }
.breadcrumb__list { list-style: none; display: flex; flex-wrap: wrap; gap: .5rem; margin: 0; padding: 0; }
.breadcrumb__item { font-size: 12px; letter-spacing: .06em; color: var(--c-green-500); }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; margin-right: .5rem; color: var(--line); }
.breadcrumb__link { color: inherit; text-decoration: none; border-bottom: 1px dotted var(--line); }
.breadcrumb__link:hover { color: var(--c-orange); border-bottom-color: var(--c-orange); }

/* 正文 */
.prose { max-width: 72ch; }
.prose > * + * { margin-top: 1.1rem; }
.prose h2 { font-size: clamp(1.4rem, 2.4vw, 1.8rem); margin-top: 2.2rem; }
.prose h3 { font-size: clamp(1.15rem, 1.8vw, 1.35rem); margin-top: 1.7rem; }
.prose ul, .prose ol { padding-left: 1.35rem; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .4rem; }
.prose a {
  color: var(--c-green-700);
  text-decoration: underline;
  text-decoration-color: var(--c-orange);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--c-orange-700); }
.prose blockquote {
  border-left: 4px solid var(--c-orange);
  padding: .35rem 0 .35rem 1rem;
  color: var(--c-green-700);
}

/* 网格 */
.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.75rem); grid-template-columns: 1fr; }
.grid--2, .grid--3, .grid--aside { grid-template-columns: 1fr; }

/* 地平线分隔 */
.horizon-rule {
  position: relative;
  height: 1px;
  border: 0;
  margin: 2.2rem 0;
  background: linear-gradient(90deg, transparent, var(--line) 16%, var(--line) 84%, transparent);
}
.horizon-rule::after {
  content: "";
  position: absolute;
  left: 50%;
  top: -6px;
  width: 12px;
  height: 12px;
  margin-left: -6px;
  background: var(--c-orange);
  transform: rotate(45deg);
}

/* 显现 */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .6s ease;
}
.has-js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 4. 报头 ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -120px;
  z-index: 120;
  display: inline-block;
  padding: .7rem 1rem;
  background: var(--c-orange);
  color: #221005;
  font-weight: 800;
  text-decoration: none;
  transition: top .18s ease;
}
.skip-link:focus,
.skip-link:focus-visible { top: .75rem; }

.site-header { position: relative; }

.masthead {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(115deg,
      var(--c-green-800) 0%,
      var(--c-green-800) 68%,
      var(--c-green-700) 68%,
      var(--c-green-700) 100%);
  border-bottom: 1px solid rgba(46, 125, 91, .55);
}
.masthead::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 34%;
  height: 5px;
  background: linear-gradient(90deg, rgba(255, 106, 43, 0), var(--c-orange));
  pointer-events: none;
}
.masthead::after {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: -46px;
  height: 68px;
  border-radius: 50%;
  border-top: 1px solid rgba(185, 212, 255, .18);
  pointer-events: none;
}

.masthead__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: .9rem;
  padding-block: 1.15rem 1.3rem;
  text-align: center;
}

.masthead__side { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: .55rem; }
.masthead__meta { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; }

.brand {
  display: grid;
  justify-items: center;
  gap: .18rem;
  text-decoration: none;
}
.brand__en {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--c-blue-200);
}
.brand__cn {
  font-size: clamp(1.85rem, 5vw, 2.9rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: .16em;
  color: var(--c-snow);
  padding-bottom: .18rem;
  border-bottom: 3px double rgba(255, 106, 43, .85);
}
.brand__line {
  font-size: 12px;
  letter-spacing: .22em;
  color: rgba(247, 250, 248, .68);
}

.nav-bar {
  position: sticky;
  top: 0;
  z-index: 70;
  background: rgba(6, 28, 22, .98);
  border-bottom: 1px solid rgba(46, 125, 91, .5);
}
.nav-bar__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--nav-h);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: rgba(11, 59, 46, .9);
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--c-orange), var(--c-gold));
  transition: width .12s linear;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem .9rem;
  background: transparent;
  border: 1px solid var(--line-light);
  color: var(--c-snow);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  cursor: pointer;
}
.nav-toggle:hover { border-color: var(--c-orange); color: var(--c-orange); }
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: var(--c-orange);
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-nav { display: block; }
.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: clamp(.2rem, 1.4vw, 1.05rem);
  overflow-x: auto;
  scrollbar-width: thin;
  counter-reset: navidx;
}
.site-nav__item { display: flex; counter-increment: navidx; }
.site-nav__link {
  display: inline-block;
  padding: .95rem .55rem;
  color: rgba(247, 250, 248, .86);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}
.site-nav__link::before {
  content: counter(navidx, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0;
  color: rgba(185, 212, 255, .55);
  margin-right: .45rem;
  vertical-align: super;
}
.site-nav__link:hover { color: var(--c-orange); border-bottom-color: rgba(255, 106, 43, .6); }
.site-nav__link[aria-current="page"] {
  color: var(--c-orange);
  background: rgba(255, 106, 43, .1);
  border-bottom-color: var(--c-orange);
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(2.5rem, 6vw, 5rem);
  background: var(--c-green-900);
  color: rgba(247, 250, 248, .82);
  border-top: 4px solid var(--c-orange);
}
.footer-horizon {
  position: relative;
  height: 74px;
  overflow: hidden;
}
.footer-horizon::before,
.footer-horizon::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 50%;
}
.footer-horizon::before {
  width: 150%;
  height: 150px;
  bottom: -112px;
  border: 1px solid rgba(185, 212, 255, .26);
  box-shadow: inset 0 0 60px rgba(46, 125, 91, .35);
}
.footer-horizon::after {
  width: 168%;
  height: 190px;
  bottom: -154px;
  border: 1px solid rgba(46, 125, 91, .55);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin: 0 0 1rem;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .2em;
  color: var(--c-blue-200);
}
.footer-col__title::before {
  content: "";
  flex: 0 0 auto;
  width: 18px;
  height: 6px;
  background: var(--c-orange);
}

.footer-brand { display: grid; gap: .1rem; text-decoration: none; margin-bottom: .85rem; }
.footer-brand__en {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .4em;
  text-transform: uppercase;
  color: rgba(185, 212, 255, .8);
}
.footer-brand__cn {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: .14em;
  color: var(--c-snow);
}
.footer-brand__text { font-size: 15px; line-height: 1.8; color: rgba(247, 250, 248, .78); }
.footer-brand__coord {
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-gold);
}

.footer-list { list-style: none; display: grid; gap: .6rem; margin: 0; padding: 0; }
.footer-list a {
  font-size: 15px;
  color: rgba(247, 250, 248, .8);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.footer-list a:hover { color: var(--c-orange); border-bottom-color: rgba(255, 106, 43, .55); }

.footer-contact {
  display: grid;
  gap: .5rem;
  padding: 1.25rem 0;
  border-top: 1px dashed rgba(46, 125, 91, .7);
  border-bottom: 1px dashed rgba(46, 125, 91, .7);
}
.footer-contact__line { font-size: 15px; color: rgba(247, 250, 248, .92); }
.footer-contact__note { font-size: 13px; color: rgba(185, 212, 255, .72); }

.footer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1.5rem;
  padding: 1.25rem 0 2rem;
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(185, 212, 255, .72);
}
.footer-bar__legal, .footer-bar__year { margin: 0; }
.footer-aux { list-style: none; display: flex; flex-wrap: wrap; gap: 1rem; margin: 0; padding: 0; }
.footer-aux a { color: rgba(247, 250, 248, .8); text-decoration: none; }
.footer-aux a:hover { color: var(--c-orange); }

/* ---------- 6. 响应式 ---------- */
@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    max-height: min(72vh, 560px);
    overflow-y: auto;
    background: var(--c-green-800);
    border-top: 1px solid rgba(46, 125, 91, .5);
    border-bottom: 3px solid var(--c-orange);
    box-shadow: 0 24px 48px rgba(6, 28, 22, .55);
  }
  .site-nav[data-open] { display: block; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; overflow: visible; padding: .35rem 0; }
  .site-nav__item { display: block; }
  .site-nav__link {
    display: block;
    padding: .95rem 1.25rem;
    font-size: 16px;
    border-bottom: 1px solid rgba(46, 125, 91, .35);
    border-left: 3px solid transparent;
  }
  .site-nav__link::before { vertical-align: baseline; }
  .site-nav__link[aria-current="page"] {
    background: rgba(255, 106, 43, .14);
    border-bottom-color: rgba(46, 125, 91, .35);
    border-left-color: var(--c-orange);
  }
}

@media (min-width: 700px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2.25rem; }
}

@media (min-width: 900px) {
  .masthead__inner {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 1.25rem;
    padding-block: 1.5rem;
    text-align: left;
  }
  .masthead__side--left { justify-content: flex-start; }
  .masthead__side--right { justify-content: flex-end; }
  .masthead__meta { justify-content: flex-start; }
  .nav-toggle { display: none; }
  .site-nav { display: block; }
  .nav-bar__inner { justify-content: center; }
  .tabs__list { justify-content: flex-start; }
}

@media (min-width: 1000px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--aside { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .has-js [data-reveal] { opacity: 1; transform: none; }
  .scroll-progress__bar { transition: none; }
}