/* ==========================================================================
   明升体育官方综合体育 — 共享样式表 /assets/site.css
   主场深墨绿 / 客场炽热橙红 / 数据电子蓝 / 暖灰阅读底
   ========================================================================== */

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

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

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, figcaption,
blockquote, dl, dt, dd, fieldset { margin: 0; padding: 0; }

ul, ol { list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid #1F6FEB; outline-offset: 2px; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 双极主色 + 数据色 */
  --c-home-deep: #0E3B2E;
  --c-home-leaf: #1F6B4A;
  --c-home-shadow: #0A2A21;
  --c-away-flame: #E4572E;
  --c-away-clay: #B23A1F;
  --c-data-blue: #1F6FEB;
  --c-data-cyan: #5BC0EB;

  /* 纸张与矿物质 */
  --c-paper: #F2EFE9;
  --c-stone: #8A857D;
  --c-card: #FBF9F4;
  --c-terra: #C97B5A;
  --c-ink: #121A16;

  --c-ink-soft: rgba(18, 26, 22, .68);
  --c-ink-mute: rgba(18, 26, 22, .46);
  --c-line: rgba(18, 26, 22, .14);
  --c-line-soft: rgba(18, 26, 22, .08);
  --c-line-invert: rgba(251, 249, 244, .16);

  --font-head: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "DIN Alternate", ui-monospace, monospace;

  --wrap: 1200px;
  --wrap-wide: 1420px;
  --gutter: clamp(1rem, 3.2vw, 2.75rem);
  --section-y: clamp(3rem, 7vw, 6rem);

  --slice: -7deg;

  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 34px;

  --sh-1: 0 1px 2px rgba(18, 26, 22, .05), 0 14px 34px -22px rgba(14, 59, 46, .45);
  --sh-2: 0 2px 6px rgba(18, 26, 22, .06), 0 28px 60px -30px rgba(14, 59, 46, .50);

  --focus-ring: 0 0 0 3px rgba(31, 111, 235, .45);
  --focus-ring-invert: 0 0 0 3px rgba(91, 192, 235, .55);

  --ease: cubic-bezier(.22, .68, .32, 1);
}

/* ---------- 3. 基础排版 ---------- */
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-ink);
  background-color: var(--c-paper);
  background-image:
    radial-gradient(760px 520px at 6% -4%, rgba(31, 107, 74, .10), transparent 62%),
    radial-gradient(680px 460px at 104% 6%, rgba(228, 87, 46, .09), transparent 58%),
    radial-gradient(900px 700px at 50% 118%, rgba(31, 111, 235, .07), transparent 60%);
  background-repeat: no-repeat;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.012em;
  color: var(--c-ink);
}
h1 { font-size: clamp(2.2rem, 5.4vw, 4.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.18rem, 1.8vw, 1.5rem); }
h4 { font-size: 1.06rem; font-weight: 700; }

p { max-width: 72ch; }
strong { font-weight: 700; }
small { font-size: .82rem; }

.link,
.prose a {
  color: var(--c-data-blue);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}
.link:hover,
.prose a:hover { color: var(--c-home-leaf); }

#main-content { display: block; scroll-margin-top: 150px; }

/* ---------- 4. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--wide { max-width: var(--wrap-wide); }
.wrap--tight { max-width: 900px; }

.section { position: relative; padding-block: var(--section-y); }
.section--tight { padding-block: clamp(1.8rem, 4vw, 3rem); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-bottom: clamp(1.4rem, 3vw, 2.4rem);
}
.section-head__text { max-width: 62ch; }

.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.75rem); }
.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--4-8 { grid-template-columns: 4fr 8fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--3-9 { grid-template-columns: 3fr 9fr; }
.grid--9-3 { grid-template-columns: 9fr 3fr; }

.band {
  background: var(--c-card);
  border-block: 1px solid var(--c-line-soft);
}
.band--lined {
  background-image: linear-gradient(90deg, rgba(31, 111, 235, .06) 1px, transparent 1px);
  background-size: 56px 100%;
}

.slice-divider {
  display: block;
  width: 100%;
  height: clamp(26px, 4vw, 54px);
  background: linear-gradient(100deg,
    rgba(31, 107, 74, .16) 0%,
    rgba(31, 111, 235, .12) 48%,
    rgba(228, 87, 46, .16) 100%);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  opacity: .9;
  pointer-events: none;
}

/* ---------- 5. 文字构件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--c-home-leaf);
  margin-bottom: .7rem;
}
.eyebrow::before {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .7;
}
.eyebrow--away { color: var(--c-away-flame); }
.eyebrow--data { color: var(--c-data-blue); }

.lede {
  font-size: clamp(1rem, 1.4vw, 1.14rem);
  line-height: 1.85;
  color: var(--c-ink-soft);
  max-width: 64ch;
}

.prose { max-width: 72ch; }
.prose p { margin-block: 0 1.15em; }
.prose h2 { margin-block: 2.2em .8em; }
.prose h3 { margin-block: 1.8em .7em; }
.prose ul { list-style: disc; padding-left: 1.4em; margin-block: 0 1.15em; }
.prose li { margin-block: .35em; }
.prose strong { color: var(--c-home-deep); }

.u-mono { font-family: var(--font-mono); letter-spacing: .02em; }

/* ---------- 6. 标签 / 数据 ---------- */
.label {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .24rem .62rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  line-height: 1.5;
  white-space: nowrap;
}
.label--home { background: rgba(31, 107, 74, .14); color: var(--c-home-leaf); box-shadow: inset 0 0 0 1px rgba(31, 107, 74, .28); }
.label--away { background: rgba(228, 87, 46, .14); color: var(--c-away-clay); box-shadow: inset 0 0 0 1px rgba(228, 87, 46, .30); }
.label--data { background: rgba(31, 111, 235, .12); color: var(--c-data-blue); box-shadow: inset 0 0 0 1px rgba(31, 111, 235, .28); }
.label--stone { background: rgba(138, 133, 125, .14); color: #6c665e; box-shadow: inset 0 0 0 1px rgba(138, 133, 125, .30); }
.label--terra { background: rgba(201, 123, 90, .16); color: #9c5433; box-shadow: inset 0 0 0 1px rgba(201, 123, 90, .34); }
.label--invert { background: rgba(251, 249, 244, .12); color: var(--c-card); box-shadow: inset 0 0 0 1px rgba(251, 249, 244, .24); }

.round-no {
  display: inline-flex;
  align-items: baseline;
  gap: .3rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--c-home-deep);
}
.round-no__prefix {
  font-size: .62rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-stone);
  font-weight: 600;
}
.round-no__value { font-size: 1.5rem; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }

.stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: -.03em;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}

/* ---------- 7. 容器构件 ---------- */
.card {
  position: relative;
  background: var(--c-card);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--r-lg);
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  box-shadow: var(--sh-1);
}
.card--dark {
  background: linear-gradient(160deg, #123F31 0%, #0C3125 100%);
  color: var(--c-card);
  border-color: rgba(91, 192, 235, .24);
}
.card--dark h1, .card--dark h2, .card--dark h3, .card--dark h4 { color: var(--c-card); }
.card--tilt { transform: rotate(-1.2deg); }

.panel {
  position: relative;
  background: var(--c-card);
  border: 1px solid rgba(31, 111, 235, .22);
  border-radius: var(--r-md);
  padding: clamp(1rem, 2vw, 1.4rem);
  overflow: hidden;
}
.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(31, 111, 235, .07) 1px, transparent 1px),
    linear-gradient(0deg, rgba(31, 111, 235, .07) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.panel > * { position: relative; z-index: 1; }

/* ---------- 8. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-line-soft);
  background: linear-gradient(140deg,
    rgba(31, 107, 74, .16) 0%,
    rgba(31, 111, 235, .12) 58%,
    rgba(228, 87, 46, .12) 100%);
}
.media-frame > img,
.media-frame > video,
.media-frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--3x2 { aspect-ratio: 3 / 2; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: .75rem;
  bottom: .75rem;
  padding: .28rem .7rem;
  border-radius: 999px;
  background: rgba(14, 59, 46, .84);
  color: var(--c-card);
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .62rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .86rem;
  letter-spacing: .04em;
  line-height: 1.5;
  transition: transform .18s var(--ease), background-color .18s ease,
              color .18s ease, border-color .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }

.btn--cta { background: var(--c-away-flame); color: #fff; border-color: rgba(255, 255, 255, .16); }
.btn--cta:hover { background: #F06A41; }
.btn--cta:focus-visible { box-shadow: var(--focus-ring-invert); }

.btn--home { background: var(--c-home-leaf); color: #fff; }
.btn--home:hover { background: #257955; }

.btn--data { background: var(--c-data-blue); color: #fff; }
.btn--data:hover { background: #2F7DF3; }

.btn--ghost { background: transparent; color: var(--c-home-deep); border-color: var(--c-line); }
.btn--ghost:hover { border-color: var(--c-home-leaf); color: var(--c-home-leaf); }

/* ---------- 10. 表格式内容 ---------- */
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th, .table td {
  padding: .7rem .85rem;
  text-align: left;
  border-bottom: 1px solid var(--c-line-soft);
}
.table thead th {
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-stone);
}
.table tbody tr { transition: background-color .16s ease; }
.table tbody tr:hover { background: rgba(31, 107, 74, .05); }
.table .is-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* ---------- 11. 折叠面板 ---------- */
.accordion { display: flex; flex-direction: column; gap: .65rem; }
.accordion details {
  background: var(--c-card);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}
.accordion summary {
  cursor: pointer;
  padding: 1rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  list-style: none;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin-right: .25rem;
  border-right: 2px solid var(--c-home-leaf);
  border-bottom: 2px solid var(--c-home-leaf);
  transform: rotate(45deg);
  transition: transform .22s var(--ease);
}
.accordion details[open] summary::after { transform: rotate(-135deg); }
.accordion summary:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.accordion__body {
  padding: 0 1.2rem 1.2rem;
  font-size: .94rem;
  color: var(--c-ink-soft);
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb {
  padding: clamp(.7rem, 1.6vw, 1rem) 0;
  border-bottom: 1px solid var(--c-line-soft);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-ink-mute);
}
.breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
.breadcrumb__item { display: inline-flex; align-items: center; gap: .5rem; }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; color: var(--c-stone); opacity: .7; }
.breadcrumb__link { color: var(--c-ink-soft); transition: color .18s ease; }
.breadcrumb__link:hover { color: var(--c-home-leaf); }
.breadcrumb__link:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 3px; }
.breadcrumb__current { color: var(--c-ink); }

/* ---------- 13. 筛选按钮 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}
.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .95rem;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: var(--c-card);
  color: var(--c-ink-soft);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .82rem;
  letter-spacing: .04em;
  transition: background-color .18s ease, color .18s ease,
              border-color .18s ease, transform .18s ease;
}
.filter-btn:hover {
  transform: translateY(-1px);
  border-color: var(--c-home-leaf);
  color: var(--c-home-leaf);
}
.filter-btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.filter-btn[aria-pressed="true"] {
  background: var(--c-data-blue);
  border-color: var(--c-data-blue);
  color: #fff;
}
.filter-count { font-family: var(--font-mono); font-size: .68rem; opacity: .72; }
.filter-status {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-ink-mute);
}
[data-filter-item][hidden] { display: none !important; }
[data-filter-item] { animation: item-in .32s var(--ease) both; }
@keyframes item-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 14. 入场动效 ---------- */
.reveal { transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal[data-reveal-state="hidden"] { opacity: 0; transform: translateY(18px); }
.reveal[data-reveal-state="shown"] { opacity: 1; transform: none; }

/* ---------- 15. 页头 ---------- */
.skip-link {
  position: fixed;
  top: .6rem;
  left: .6rem;
  z-index: 300;
  padding: .6rem 1.1rem;
  border-radius: 999px;
  background: var(--c-card);
  color: var(--c-home-deep);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .86rem;
  box-shadow: 0 12px 28px -12px rgba(0, 0, 0, .65);
  transform: translateY(-180%);
  transition: transform .22s var(--ease);
}
.skip-link:focus { transform: none; outline: 3px solid var(--c-data-blue); outline-offset: 2px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  color: var(--c-card);
  background-color: var(--c-home-deep);
  background-image:
    radial-gradient(560px 240px at 10% 0%, rgba(31, 107, 74, .55), transparent 70%),
    radial-gradient(500px 220px at 92% 100%, rgba(178, 58, 31, .34), transparent 72%),
    linear-gradient(180deg, #0E3B2E 0%, #0B3025 100%);
  border-bottom: 1px solid rgba(91, 192, 235, .28);
  box-shadow: 0 18px 40px -32px rgba(0, 0, 0, .85);
}
.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(91, 192, 235, .09) 1px, transparent 1px);
  background-size: 72px 100%;
  opacity: .75;
  pointer-events: none;
}
.site-header :focus-visible { outline-color: var(--c-data-cyan); }

.header-inner {
  position: relative;
  z-index: 1;
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(251, 249, 244, .12);
  overflow: hidden;
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg,
    var(--c-home-leaf) 0%,
    var(--c-data-blue) 52%,
    var(--c-away-flame) 100%);
  transition: width .12s linear;
}

/* 刊头 */
.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(.75rem, 2vw, 1.75rem);
  padding: clamp(.85rem, 1.9vw, 1.25rem) 0 clamp(.7rem, 1.5vw, .95rem);
  min-height: 78px;
}
.masthead__aside {
  display: flex;
  align-items: center;
  gap: .85rem;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(251, 249, 244, .6);
}
.masthead__aside--left { justify-content: flex-start; }
.masthead__aside--right { justify-content: flex-end; }
.masthead__coord { white-space: nowrap; }
.masthead__status { display: inline-flex; align-items: center; gap: .4rem; white-space: nowrap; }

.pulse-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-home-leaf);
  box-shadow: 0 0 0 1px rgba(91, 192, 235, .6), 0 0 0 5px rgba(31, 107, 74, .32);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: .55; transform: scale(.88); }
  50% { opacity: 1; transform: scale(1.1); }
}

.masthead__brand { justify-self: center; text-align: center; min-width: 0; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  text-align: left;
}
.brand__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: clamp(38px, 4.6vw, 46px);
  height: clamp(38px, 4.6vw, 46px);
  border-radius: 14px 14px 14px 4px;
  background: linear-gradient(150deg, var(--c-home-leaf) 0%, #0C3125 100%);
  border: 1px solid rgba(91, 192, 235, .45);
  color: var(--c-card);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  line-height: 1;
  box-shadow: inset 0 1px 0 rgba(251, 249, 244, .16), 0 10px 20px -12px rgba(0, 0, 0, .8);
}
.brand__text { display: flex; flex-direction: column; gap: .2rem; min-width: 0; }
.brand__line {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.02rem, 1.9vw, 1.34rem);
  letter-spacing: .03em;
  line-height: 1.1;
  color: var(--c-card);
  white-space: nowrap;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  line-height: 1;
  color: rgba(91, 192, 235, .9);
  white-space: nowrap;
}

/* 移动端栏目按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: .78rem .2rem;
  color: rgba(251, 249, 244, .82);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  border-top: 1px solid var(--c-line-invert);
}
.nav-toggle:focus-visible { outline: none; box-shadow: var(--focus-ring-invert); border-radius: var(--r-xs); }
.nav-toggle__label { display: inline-block; }
.nav-toggle__bars {
  flex: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 22px;
}
.nav-toggle__bars span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .25s var(--ease), opacity .18s ease;
}
.nav-toggle__bars span:nth-child(2) { width: 62%; }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 居中栏目索引 */
.site-nav {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--c-line-invert);
}
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(.15rem, 1vw, .7rem);
  padding: .3rem 0 .6rem;
}
.site-nav__item { display: block; }
.site-nav__link {
  position: relative;
  display: inline-block;
  padding: .5rem .95rem;
  border-radius: var(--r-xs);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .92rem;
  letter-spacing: .07em;
  color: rgba(251, 249, 244, .76);
  transition: color .18s ease, background-color .18s ease;
}
.site-nav__link:hover { color: #fff; background: rgba(251, 249, 244, .08); }
.site-nav__link:focus-visible { outline: none; box-shadow: var(--focus-ring-invert); }
.site-nav__link[aria-current="page"] {
  color: #fff;
  background: rgba(31, 111, 235, .24);
  box-shadow: inset 0 0 0 1px rgba(91, 192, 235, .42);
}
.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: .12rem;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  transform: translateX(-50%);
  background: var(--c-away-flame);
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(.9rem, 2.4vw, 1.6rem);
  bottom: clamp(.9rem, 2.4vw, 1.6rem);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--c-home-deep);
  color: var(--c-card);
  border: 1px solid rgba(91, 192, 235, .42);
  font-size: 1rem;
  line-height: 1;
  box-shadow: 0 14px 30px -16px rgba(0, 0, 0, .8);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .25s ease, transform .25s var(--ease),
              visibility .25s ease, background-color .18s ease;
}
.to-top[data-visible="true"] { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--c-home-leaf); }
.to-top:focus-visible { outline: none; box-shadow: var(--focus-ring-invert); }

/* ---------- 16. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--section-y);
  overflow: hidden;
  color: rgba(251, 249, 244, .78);
  background-color: var(--c-home-shadow);
  background-image:
    radial-gradient(620px 320px at 8% 0%, rgba(31, 107, 74, .50), transparent 68%),
    radial-gradient(540px 300px at 96% 100%, rgba(178, 58, 31, .34), transparent 70%),
    linear-gradient(180deg, #0B3025 0%, #081F19 100%);
  border-top: 1px solid rgba(91, 192, 235, .24);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg,
    var(--c-home-leaf) 0%,
    var(--c-data-blue) 55%,
    var(--c-away-flame) 100%);
  opacity: .9;
}
.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(91, 192, 235, .06) 1px, transparent 1px);
  background-size: 88px 100%;
  opacity: .8;
  pointer-events: none;
}
.site-footer :focus-visible { outline-color: var(--c-data-cyan); }

.footer-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--wrap-wide);
  margin-inline: auto;
  padding: clamp(2.4rem, 5vw, 4rem) var(--gutter) clamp(1.1rem, 2.4vw, 1.6rem);
}
.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, .85fr)) minmax(0, 1.35fr);
  gap: clamp(1.4rem, 3vw, 2.8rem);
  padding-bottom: clamp(1.6rem, 3.4vw, 2.4rem);
  border-bottom: 1px solid var(--c-line-invert);
}
.footer-brand { display: flex; flex-direction: column; gap: 1rem; }
.brand--footer .brand__line { font-size: 1.16rem; }
.footer-note {
  font-size: .86rem;
  line-height: 1.85;
  color: rgba(251, 249, 244, .6);
  max-width: 38ch;
}

.footer-col { min-width: 0; }
.footer-col__title {
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--c-data-cyan);
  margin-bottom: .95rem;
}
.footer-links { display: flex; flex-direction: column; gap: .55rem; }
.footer-links a {
  display: inline-block;
  font-size: .9rem;
  color: rgba(251, 249, 244, .76);
  transition: color .18s ease, transform .18s var(--ease);
}
.footer-links a:hover { color: #fff; transform: translateX(3px); }
.footer-links a:focus-visible { outline: none; box-shadow: var(--focus-ring-invert); border-radius: 4px; }

.footer-contact { display: flex; flex-direction: column; gap: .7rem; }
.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: .45rem .6rem;
}
.footer-contact__key {
  min-width: 3.8rem;
  padding-top: .22rem;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(251, 249, 244, .42);
}
.footer-contact__val {
  font-family: var(--font-mono);
  font-size: .84rem;
  letter-spacing: .02em;
  color: rgba(251, 249, 244, .88);
  word-break: break-all;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .2rem .58rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .1em;
  color: rgba(91, 192, 235, .95);
  background: rgba(31, 111, 235, .16);
  border: 1px solid rgba(91, 192, 235, .32);
  transition: background-color .18s ease, color .18s ease, transform .18s ease;
}
.copy-btn:hover { background: rgba(31, 111, 235, .3); color: #fff; transform: translateY(-1px); }
.copy-btn:focus-visible { outline: none; box-shadow: var(--focus-ring-invert); }
.copy-btn[data-copied="true"] {
  background: rgba(31, 107, 74, .55);
  border-color: rgba(31, 107, 74, .85);
  color: #fff;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .6rem 1.5rem;
  padding-top: clamp(1rem, 2vw, 1.4rem);
  font-size: .78rem;
  color: rgba(251, 249, 244, .5);
}
.footer-bottom__copy,
.footer-bottom__icp {
  max-width: none;
  font-family: var(--font-mono);
  letter-spacing: .06em;
}

.footer-address {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .75rem;
  max-width: none;
  margin-top: .7rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  color: rgba(251, 249, 244, .48);
}
.footer-address__key {
  display: inline-block;
  padding: .15rem .6rem;
  border-radius: 999px;
  border: 1px solid rgba(91, 192, 235, .28);
  font-size: .6rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(91, 192, 235, .78);
}

/* ---------- 17. 平板 ---------- */
@media (max-width: 1100px) {
  .footer-main { grid-template-columns: minmax(0, 1.3fr) repeat(2, minmax(0, .9fr)); }
  .footer-main > .footer-col:last-child { grid-column: 1 / -1; }
  .footer-contact { flex-direction: row; flex-wrap: wrap; gap: 1rem 2.4rem; }
  .footer-contact__row { flex: 1 1 260px; }
}

@media (max-width: 1024px) {
  .grid--5-7, .grid--7-5, .grid--4-8, .grid--8-4, .grid--3-9, .grid--9-3 {
    grid-template-columns: 1fr;
  }
}

/* ---------- 18. 手机 ---------- */
@media (max-width: 880px) {
  #main-content { scroll-margin-top: 96px; }

  .masthead {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: .7rem;
    padding: .95rem 0 .7rem;
    min-height: 0;
  }
  .masthead__aside--left { display: none; }
  .masthead__aside--right { justify-content: center; width: 100%; }
  .brand__line { font-size: 1.08rem; }
  .brand__sub { letter-spacing: .16em; }

  .nav-toggle { display: flex; }

  .site-nav {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    border-top: 0;
    transition: max-height .34s var(--ease), opacity .22s ease, visibility .22s ease;
  }
  .site-header[data-open="true"] .site-nav {
    max-height: min(66vh, 520px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    border-top: 1px solid var(--c-line-invert);
    padding-bottom: .4rem;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: .12rem;
    padding: .55rem 0 .5rem;
  }
  .site-nav__item { width: 100%; }
  .site-nav__link { display: block; padding: .8rem 1.1rem; font-size: 1rem; }
  .site-nav__link[aria-current="page"] { padding-left: 1.5rem; }
  .site-nav__link[aria-current="page"]::after {
    left: .55rem;
    top: 50%;
    bottom: auto;
    width: 3px;
    height: 18px;
    transform: translateY(-50%);
  }

  .footer-main { grid-template-columns: 1fr; gap: 1.6rem; }
  .footer-main > .footer-col:last-child { grid-column: auto; }
  .footer-contact { flex-direction: column; gap: .7rem; }
  .footer-contact__row { flex: none; }
  .footer-bottom { justify-content: flex-start; }
}

@media (max-width: 600px) {
  .media-frame { border-radius: var(--r-md); }
  .card { border-radius: var(--r-md); }
  .card--tilt { transform: none; }
  .brand__mark { border-radius: 12px 12px 12px 4px; }
  .to-top { width: 40px; height: 40px; }
}

/* ---------- 19. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal,
  .reveal[data-reveal-state="hidden"] { opacity: 1; transform: none; }
  .pulse-dot { animation: none; opacity: 1; }
  .site-nav { transition: none; }
}