/* ============================================================
   合乐看台 · 共享样式（/assets/site.css）
   看台墨绿底 + 信号青/活力橙 + 粗边框硬阴影
   ============================================================ */

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

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

body, h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video, picture { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
table { border-collapse: collapse; }
hr { border: 0; }

/* ---------- 变量 ---------- */
:root {
  --ink-950: #04120E;
  --ink-900: #061C17;
  --ink-800: #0B2E26;
  --ink-700: #11463A;
  --signal: #2FF3D0;
  --orange: #FF6A2A;
  --paper: #F7F1E3;
  --cream: #E8DFC8;
  --sage: #8FB8A8;
  --alert: #FF4D5E;
  --line: #1D7C6B;

  --bd: 2px;
  --shadow: 6px 6px 0 rgba(3, 12, 10, .65);
  --shadow-sm: 3px 3px 0 rgba(3, 12, 10, .6);

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --wrap: 1320px;
  --gutter: clamp(18px, 4vw, 48px);
  --gap: clamp(16px, 2.2vw, 28px);
  --ease: cubic-bezier(.2, .7, .3, 1);
  --header-h: 108px;
}

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(900px 520px at 88% -8%, rgba(47, 243, 208, .10), transparent 62%),
    radial-gradient(760px 480px at 6% 104%, rgba(255, 106, 42, .09), transparent 60%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: .015em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.8rem, 7vw, 7rem); }
h2 { font-size: clamp(1.9rem, 3.6vw, 3.4rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.7rem); }
h4 { font-size: clamp(1.02rem, 1.3vw, 1.2rem); letter-spacing: .04em; }

p + p { margin-top: .9em; }
strong { color: var(--signal); font-weight: 700; }

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
}

#main-content { display: block; scroll-margin-top: 128px; }

/* ---------- 通用工具 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 400;
  transform: translateY(-130%);
  padding: .7em 1.2em;
  background: var(--signal);
  color: var(--ink-950);
  font-weight: 700;
  font-size: .9rem;
  text-decoration: none;
  border: 2px solid var(--ink-950);
  transition: transform .18s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 104px);
}
.section--tight { padding-block: clamp(30px, 4vw, 60px); }
.section--ink {
  background: var(--ink-800);
  border-block: var(--bd) solid var(--line);
}
.section--cream {
  background: var(--cream);
  color: var(--ink-900);
  border-block: var(--bd) solid var(--ink-700);
}
.section--cream .lead,
.section--cream .eyebrow { color: var(--ink-700); }

.section-index {
  position: absolute;
  top: clamp(-10px, -1.6vw, 0px);
  right: var(--gutter);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(4rem, 12vw, 9rem);
  line-height: .8;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(47, 243, 208, .17);
  pointer-events: none;
  user-select: none;
}
.section--cream .section-index { -webkit-text-stroke-color: rgba(6, 28, 23, .16); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--signal);
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--orange);
}

.lead {
  max-width: 62ch;
  font-size: clamp(1rem, 1.4vw, 1.16rem);
  color: var(--sage);
}

.mono {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .1em;
}

.rule {
  height: 2px;
  border: 0;
  background: linear-gradient(90deg, var(--signal), rgba(47, 243, 208, 0));
}

.stack { display: grid; gap: var(--gap); align-content: start; }
.stack--tight { gap: .7rem; }

/* ---------- 栅格 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-5  { grid-column: span 5; }
.col-6  { grid-column: span 6; }
.col-7  { grid-column: span 7; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: var(--gap);
}
.split--reverse { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45em;
  padding: .75em 1.2em;
  border: var(--bd) solid transparent;
  border-radius: 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .92rem;
  line-height: 1.2;
  letter-spacing: .03em;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform .18s var(--ease),
    box-shadow .18s var(--ease),
    background-color .18s var(--ease),
    border-color .18s var(--ease),
    color .18s var(--ease);
}
.btn:hover { transform: translate(-2px, -2px); }
.btn:active { transform: translate(0, 0); }

.btn--sm { font-size: .8rem; padding: .5em .85em; letter-spacing: .05em; }

.btn-signal {
  background: var(--signal);
  color: var(--ink-950);
  box-shadow: 4px 4px 0 rgba(4, 18, 14, .9);
}
.btn-signal:hover { box-shadow: 7px 7px 0 var(--orange); }

.btn-orange {
  background: var(--orange);
  color: #1B0A03;
  box-shadow: 4px 4px 0 rgba(4, 18, 14, .9);
}
.btn-orange:hover { box-shadow: 7px 7px 0 var(--signal); }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line);
}
.btn-ghost:hover {
  color: var(--signal);
  border-color: var(--signal);
  box-shadow: 4px 4px 0 rgba(47, 243, 208, .22);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .32em .7em;
  border: 1px solid var(--line);
  background: rgba(17, 70, 58, .55);
  color: var(--sage);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  white-space: nowrap;
}
.tag--signal { background: var(--signal); border-color: var(--signal); color: var(--ink-950); font-weight: 700; }
.tag--orange { background: var(--orange); border-color: var(--orange); color: #1B0A03; font-weight: 700; }
.tag--cream  { background: var(--cream);  border-color: var(--cream);  color: var(--ink-900); font-weight: 700; }

/* ---------- 卡片 / 比分牌 ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--ink-800);
  border: var(--bd) solid var(--line);
  box-shadow: var(--shadow-sm);
}
.card--interactive { transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease); }
.card--interactive:hover {
  transform: translate(-3px, -3px);
  border-color: var(--signal);
  box-shadow: var(--shadow);
}

.archive-card {
  padding: clamp(16px, 2vw, 26px);
  background: var(--ink-800);
  border: var(--bd) solid var(--line);
  border-left: 6px solid var(--signal);
}

.board {
  padding: clamp(16px, 2vw, 24px);
  background: var(--ink-950);
  border: var(--bd) solid var(--signal);
  box-shadow: var(--shadow);
}
.board-num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}
.board-label {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--sage);
}

/* ---------- 图片容器 ---------- */
.frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--ink-700), var(--ink-950));
  border: var(--bd) solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}
.frame--wide   { aspect-ratio: 21 / 9; }
.frame--tall   { aspect-ratio: 3 / 4; }
.frame--square { aspect-ratio: 1 / 1; }

.frame > img,
.frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(160deg, rgba(47, 243, 208, .16), transparent 46%);
  mix-blend-mode: screen;
}
.frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42%;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 28, 23, 0), rgba(4, 18, 14, .86));
}
.frame-tag {
  position: absolute;
  z-index: 2;
  top: 12px;
  left: 12px;
}
.frame-caption {
  margin-top: .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--sage);
}

/* ---------- 横向赛事带 ---------- */
.rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(238px, 300px);
  gap: var(--gap);
  overflow-x: auto;
  padding-bottom: 1rem;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--signal) var(--ink-700);
}
.rail > * { scroll-snap-align: start; }
.rail::-webkit-scrollbar { height: 8px; }
.rail::-webkit-scrollbar-track { background: var(--ink-700); }
.rail::-webkit-scrollbar-thumb { background: var(--signal); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5em;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--sage);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: .5em; }
.breadcrumb li + li::before { content: "/"; color: var(--line); }
.breadcrumb a {
  color: var(--sage);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--signal); border-bottom-color: var(--signal); }
.breadcrumb [aria-current="page"] { color: var(--paper); }

/* ---------- 分段切换 ---------- */
.seg { display: grid; gap: clamp(16px, 2vw, 24px); }
.seg-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding-bottom: .6rem;
  border-bottom: var(--bd) solid var(--line);
}
.seg-btn {
  appearance: none;
  padding: .5em .95em;
  background: transparent;
  border: var(--bd) solid var(--line);
  color: var(--sage);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease), box-shadow .18s var(--ease);
}
.seg-btn:hover { color: var(--paper); border-color: var(--signal); }
.seg-btn[aria-selected="true"] {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink-950);
  font-weight: 700;
  box-shadow: 3px 3px 0 rgba(4, 18, 14, .9);
}
.seg-panel[hidden] { display: none; }

/* ---------- 阅读目录 ---------- */
.toc {
  display: grid;
  gap: .1rem;
  border-left: var(--bd) solid var(--line);
}
.toc-link {
  display: block;
  margin-left: -2px;
  padding: .45rem .9rem;
  border-left: 3px solid transparent;
  color: var(--sage);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .09em;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}
.toc-link:hover { color: var(--paper); background: rgba(47, 243, 208, .06); }
.toc-link[aria-current="true"] {
  color: var(--signal);
  border-left-color: var(--orange);
  background: rgba(47, 243, 208, .09);
}

/* ============================================================
   页头
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(6, 28, 23, .95), rgba(6, 28, 23, .74));
  border-bottom: 1px solid rgba(29, 124, 107, .5);
  transition: background-color .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}
.site-header[data-scrolled="true"] {
  background: var(--ink-900);
  border-bottom-color: var(--line);
  box-shadow: 0 18px 42px -22px rgba(0, 0, 0, .95);
}

.header-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: .34rem var(--gutter);
  background: linear-gradient(90deg, var(--ink-950), var(--ink-800) 55%, var(--ink-950));
  border-bottom: 1px solid rgba(29, 124, 107, .42);
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--sage);
}
.strip-note {
  display: flex;
  align-items: center;
  gap: .6em;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.strip-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(47, 243, 208, .18);
  animation: strip-pulse 2.6s ease-in-out infinite;
}
@keyframes strip-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .32; }
}
.strip-meta { color: var(--orange); letter-spacing: .17em; white-space: nowrap; }

.header-inner {
  position: relative;
  z-index: 135;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 36px);
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: .7rem var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  flex: 0 0 auto;
  text-decoration: none;
}
.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  background: var(--ink-700);
  border: var(--bd) solid var(--signal);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(47, 243, 208, .45);
}
.brand-mark-line {
  width: 16px;
  height: 2px;
  background: var(--orange);
  box-shadow: 0 -6px 0 var(--signal), 0 6px 0 var(--signal);
}
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: .07em;
  color: var(--paper);
}
.brand-line {
  margin-top: .35em;
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--signal);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
  margin-left: auto;
}
.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(2px, 1vw, 16px);
}
.nav-link {
  display: inline-block;
  position: relative;
  padding: .5em .35em;
  border-bottom: 2px solid transparent;
  color: var(--paper);
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: .02em;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--signal); border-bottom-color: var(--signal); }
.nav-link[aria-current="page"] {
  color: var(--signal);
  border-bottom-color: var(--orange);
}

.nav-entries {
  display: flex;
  align-items: center;
  gap: .6rem;
}

.header-actions {
  display: none;
  align-items: center;
  gap: .5rem;
  margin-left: auto;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .7rem;
  background: transparent;
  border: var(--bd) solid var(--line);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.nav-toggle:hover,
.nav-toggle:focus-visible { color: var(--signal); border-color: var(--signal); }
.nav-toggle-bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle-bar {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 130;
  background: rgba(4, 18, 14, .74);
  opacity: 0;
  pointer-events: none;
  transition: opacity .24s var(--ease);
}
.site-header[data-open="true"] .nav-scrim { opacity: 1; pointer-events: auto; }

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 150;
  display: block;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--signal), var(--orange));
  pointer-events: none;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  background: var(--ink-800);
  border-top: var(--bd) solid var(--line);
  color: var(--paper);
  overflow: hidden;
}
.footer-slice {
  height: 10px;
  background: repeating-linear-gradient(
    115deg,
    var(--signal) 0 18px,
    var(--ink-950) 18px 36px,
    var(--orange) 36px 54px,
    var(--ink-950) 54px 72px
  );
}
.footer-wrap {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.3fr;
  gap: clamp(24px, 4vw, 56px);
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(34px, 5vw, 64px) var(--gutter) clamp(24px, 3vw, 40px);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: .07em;
  line-height: 1;
}
.footer-logo::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  margin-top: .55rem;
  background: var(--orange);
}
.footer-line { margin-top: 1rem; font-size: 1.02rem; color: var(--paper); }
.footer-area {
  margin-top: .55rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--sage);
}
.footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.1rem;
}

.footer-title {
  margin-bottom: .95rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--signal);
}
.footer-list { display: grid; gap: .55rem; }
.footer-list + .footer-list { margin-top: 1.2rem; }
.footer-link {
  color: var(--paper);
  font-size: .93rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible { color: var(--signal); border-bottom-color: var(--signal); }

.footer-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem;
}
.footer-label {
  min-width: 3.2em;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--sage);
}
.contact-value {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .02em;
  color: var(--paper);
  word-break: break-all;
}
.copy-btn {
  padding: .12em .5em;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--sage);
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .13em;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.copy-btn:hover,
.copy-btn:focus-visible { color: var(--signal); border-color: var(--signal); }
.copy-btn[data-copied="true"] { color: var(--orange); border-color: var(--orange); }

.footer-note {
  margin-top: 1.1rem;
  padding-left: .8rem;
  border-left: 2px solid var(--orange);
  font-size: .76rem;
  line-height: 1.65;
  color: var(--sage);
}

.footer-base {
  background: var(--ink-950);
  border-top: 1px solid rgba(29, 124, 107, .45);
}
.footer-base-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 1rem var(--gutter);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .07em;
  color: var(--sage);
}
.footer-icp { color: var(--paper); }
.footer-meta { color: var(--line); }

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 961px) {
  .site-header { backdrop-filter: blur(8px); }
}

@media (max-width: 1080px) {
  .nav-link { font-size: .84rem; }
  .nav-entries .btn { font-size: .74rem; }
}

@media (max-width: 960px) {
  .header-actions { display: flex; }
  .header-cta { display: inline-flex; }

  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 140;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: min(88vw, 380px);
    margin-left: 0;
    padding: clamp(78px, 14vh, 110px) clamp(20px, 6vw, 32px) 32px;
    background: linear-gradient(160deg, var(--ink-800), var(--ink-950));
    border-left: var(--bd) solid var(--signal);
    box-shadow: -30px 0 60px -30px #000;
    overflow-y: auto;
    transform: translateX(103%);
    transition: transform .26s var(--ease);
  }
  .site-header[data-open="true"] .primary-nav { transform: translateX(0); }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item { border-bottom: 1px solid rgba(29, 124, 107, .45); }
  .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .95rem .2rem;
    border-bottom: none;
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: .07em;
  }
  .nav-link[aria-current="page"] { border-bottom: none; }

  .nav-entries {
    flex-direction: column;
    align-items: stretch;
    gap: .7rem;
    margin-top: 1.4rem;
  }
  .nav-entries .btn { width: 100%; font-size: .86rem; }

  .footer-wrap { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-12 {
    grid-column: 1 / -1;
  }
  .split,
  .split--reverse { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .strip-meta { display: none; }
  .header-strip { justify-content: center; }
  .section-index { font-size: clamp(3.4rem, 16vw, 6rem); }
}

@media (max-width: 560px) {
  .footer-wrap { grid-template-columns: 1fr; }
  .footer-base-inner { justify-content: flex-start; }
}

@media (max-width: 520px) {
  .brand-line { display: none; }
  .brand-name { font-size: 1.2rem; }
  .brand-mark { width: 36px; height: 36px; }
  .nav-toggle-label { display: none; }
  .nav-toggle { padding: .55rem; }
  .header-cta { font-size: .74rem; padding: .48em .7em; }
  .brand { gap: .55rem; }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .btn:hover,
  .card--interactive:hover { transform: none; }
}