/* ==========================================================================
   沙巴体育看台 · /assets/site.css
   夜场绿阶 / 粗边框硬阴影 / 数据叙事型专题研究板
   ========================================================================== */

/* ---------- 01 设计变量 ---------- */
:root {
  /* 色彩：夜场底 → 看台层 → 卡片层 → 深草绿，荧光绿与橙为节奏点 */
  --c-night: #06110C;
  --c-stand: #0B1A13;
  --c-card: #12291E;
  --c-deep: #0E3B2A;
  --c-brand: #17A46B;
  --c-neon: #35E68C;
  --c-mint: #A8FFD2;
  --c-white: #E8FFF4;
  --c-muted: #8CA79B;
  --c-accent: #FF7A1A;
  --c-amber: #FFB347;

  --line: rgba(23, 164, 107, 0.35);
  --line-soft: rgba(23, 164, 107, 0.2);
  --line-strong: rgba(53, 230, 140, 0.55);

  --bw: 2px;
  --r-pill: 999px;
  --r-card: 14px;
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, 0.55);
  --shadow-hard-sm: 4px 4px 0 rgba(0, 0, 0, 0.5);
  --shadow-hover: 10px 10px 0 rgba(0, 0, 0, 0.6);

  --container: 1180px;
  --container-wide: 1280px;
  --gutter: clamp(16px, 4vw, 40px);

  --fs-display: clamp(2.6rem, 7vw, 5.5rem);
  --fs-h1: clamp(2.1rem, 5.2vw, 4rem);
  --fs-h2: clamp(1.6rem, 3.2vw, 2.5rem);
  --fs-h3: clamp(1.2rem, 1.9vw, 1.55rem);
  --fs-h4: 1.2rem;
  --fs-body: clamp(15px, 1.05vw, 17px);
  --fs-small: 14px;
  --fs-index: 12px;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --t-fast: 0.18s;
  --t-mid: 0.3s;
  --t-slow: 0.6s;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "Roboto Mono", "SFMono-Regular",
    Menlo, Consolas, "Courier New", monospace;
}

/* ---------- 02 reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--c-night);
  background-image:
    radial-gradient(900px 520px at 10% -8%, rgba(23, 164, 107, 0.22), transparent 70%),
    radial-gradient(720px 460px at 102% 4%, rgba(53, 230, 140, 0.1), transparent 72%);
  background-repeat: no-repeat;
  color: var(--c-white);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; 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; width: 100%; }
strong { font-weight: 700; }

:focus-visible {
  outline: 3px solid var(--c-neon);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: var(--c-neon); color: var(--c-night); }

/* ---------- 03 中文排版 ---------- */
.display {
  font-size: var(--fs-display);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--c-white);
}
.display--heavy { font-weight: 800; letter-spacing: -0.02em; }
h1, .h1 { font-size: var(--fs-h1); font-weight: 300; line-height: 1.06; letter-spacing: -0.03em; }
h2, .h2 { font-size: var(--fs-h2); font-weight: 700; line-height: 1.15; letter-spacing: -0.015em; }
h3, .h3 { font-size: var(--fs-h3); font-weight: 700; line-height: 1.3; }
h4, .h4 { font-size: var(--fs-h4); font-weight: 700; line-height: 1.4; }

p { margin: 0; }
p + p { margin-top: 1.2em; }

.lede {
  font-size: clamp(17px, 1.55vw, 21px);
  line-height: 1.7;
  color: var(--c-mint);
  max-width: 62ch;
}

.prose { color: var(--c-mint); max-width: 68ch; }
.prose p + p { margin-top: 1.2em; }
.prose ul { display: grid; gap: 10px; margin-top: 1.2em; }
.prose li { padding-left: 22px; position: relative; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 2px;
  background: var(--c-neon);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.mono, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
}
.num { color: var(--c-amber); }

/* ---------- 04 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 52px); }

.section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px 22px;
  align-items: baseline;
  border-top: var(--bw) solid var(--line);
  padding-top: 18px;
  margin-bottom: clamp(24px, 3vw, 40px);
}
.section__num {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.18em;
  color: var(--c-muted);
  padding-top: 0.35em;
}
.section__title { font-size: var(--fs-h2); font-weight: 700; line-height: 1.15; }
.section__note {
  grid-column: 2;
  color: var(--c-muted);
  font-size: var(--fs-small);
  max-width: 66ch;
  line-height: 1.7;
}

.grid { display: grid; gap: clamp(14px, 1.8vw, 22px); }
.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)); }

.stack { display: flex; flex-direction: column; gap: var(--gap, 16px); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 20px 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.14em;
  color: var(--c-muted);
}
.breadcrumb__sep { opacity: 0.5; }
.breadcrumb__link { transition: color var(--t-fast) var(--ease); }
.breadcrumb__link:hover { color: var(--c-neon); }
.breadcrumb__current { color: var(--c-mint); }

.rule { height: var(--bw); border: 0; background: linear-gradient(90deg, var(--c-brand), rgba(23, 164, 107, 0)); }
.divider { border: 0; border-top: 1px solid var(--line-soft); }

/* ---------- 05 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: var(--bw) solid var(--c-brand);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--c-mint);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease),
    background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease);
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-hard-sm); border-color: var(--c-neon); color: var(--c-white); }
.btn:active { transform: translate(0, 0); box-shadow: none; }

.btn--accent {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-night);
  box-shadow: var(--shadow-hard-sm);
}
.btn--accent:hover { background: #FF8C3C; border-color: var(--c-accent); color: var(--c-night); box-shadow: var(--shadow-hover); }

.btn--ghost { background: rgba(23, 164, 107, 0.1); }
.btn--ghost:hover { background: rgba(23, 164, 107, 0.2); }

.btn--quiet { border-color: rgba(140, 167, 155, 0.45); color: var(--c-white); }
.btn--quiet:hover { border-color: var(--c-neon); }

.btn--sm { padding: 9px 16px; font-size: 13px; }
.btn--block { width: 100%; }

/* ---------- 06 头部：悬浮胶囊浮岛 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--c-neon);
  color: var(--c-night);
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--r-pill);
  transform: translateY(-160%);
  transition: transform var(--t-mid) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  padding: 12px 0 14px;
  background: linear-gradient(180deg, rgba(6, 17, 12, 0.96) 0%, rgba(6, 17, 12, 0.74) 62%, rgba(6, 17, 12, 0) 100%);
  transition: padding var(--t-mid) var(--ease), background var(--t-mid) var(--ease);
}
.site-header[data-scrolled="true"] {
  padding-block: 6px 8px;
  background: linear-gradient(180deg, rgba(6, 17, 12, 0.99) 0%, rgba(6, 17, 12, 0.9) 78%, rgba(6, 17, 12, 0) 100%);
}

.site-header__inner {
  position: relative;
  width: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: clamp(12px, 2vw, 24px);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 品牌浮岛 */
.brand {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 9px 18px 9px 12px;
  border: var(--bw) solid rgba(23, 164, 107, 0.5);
  border-radius: var(--r-pill);
  background: rgba(11, 26, 19, 0.9);
  box-shadow: var(--shadow-hard-sm);
  transition: border-color var(--t-fast) var(--ease), padding var(--t-mid) var(--ease),
    transform var(--t-fast) var(--ease);
}
.brand:hover { border-color: var(--c-neon); transform: translate(-1px, -1px); }

.brand__mark {
  position: relative;
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, var(--c-neon), var(--c-brand) 58%, var(--c-deep));
  box-shadow: 0 0 0 3px rgba(53, 230, 140, 0.14), inset 0 0 10px rgba(6, 17, 12, 0.55);
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 16px;
  height: var(--bw);
  background: var(--c-night);
  opacity: 0.5;
  transform: translate(-50%, -50%);
}

.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-size: 17px; font-weight: 700; letter-spacing: 0.02em; color: var(--c-white); }
.brand__tagline { font-size: 11px; letter-spacing: 0.08em; color: var(--c-muted); }

.site-header[data-scrolled="true"] .brand { padding-block: 6px; }

/* 栏目浮岛 */
.nav-capsule {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 6px 8px 6px 10px;
  border: var(--bw) solid rgba(23, 164, 107, 0.3);
  border-radius: var(--r-pill);
  background: rgba(11, 26, 19, 0.74);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: padding var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}
.site-header[data-scrolled="true"] .nav-capsule { padding-block: 4px; border-color: var(--line-soft); }

.nav-capsule__list {
  display: flex;
  align-items: center;
  gap: 2px;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-capsule__list::-webkit-scrollbar { display: none; }
.nav-capsule__item { flex: none; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 14px;
  border-radius: var(--r-pill);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--c-mint);
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 5px;
  height: var(--bw);
  background: var(--c-neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-mid) var(--ease);
}
.nav-link:hover { color: var(--c-white); background: rgba(23, 164, 107, 0.16); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] {
  color: var(--c-neon);
  background: rgba(53, 230, 140, 0.1);
}
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.site-header[data-scrolled="true"] .nav-link { padding-block: 7px; }

.nav-capsule__utility {
  flex: none;
  display: flex;
  align-items: center;
  gap: 4px;
  padding-left: 10px;
  border-left: 1px solid var(--line-soft);
}
.nav-utility__link {
  padding: 8px 10px;
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.nav-utility__link:hover { color: var(--c-mint); background: rgba(23, 164, 107, 0.16); }

/* 工具浮岛 */
.header-tools { flex: none; display: flex; align-items: center; gap: 8px; }
.header-tools__cta { box-shadow: var(--shadow-hard-sm); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: var(--bw) solid rgba(23, 164, 107, 0.5);
  border-radius: var(--r-pill);
  background: rgba(11, 26, 19, 0.92);
  color: var(--c-mint);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 18px; }
.nav-toggle__bar {
  display: block;
  height: var(--bw);
  width: 100%;
  background: var(--c-neon);
  transition: transform var(--t-mid) var(--ease), opacity var(--t-fast) var(--ease);
}
.nav-toggle[aria-expanded="true"] { border-color: var(--c-neon); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-toggle__label { white-space: nowrap; }

/* 滚动进度 */
.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--bw);
  background: rgba(23, 164, 107, 0.16);
  overflow: hidden;
}
.header-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--c-brand), var(--c-neon) 68%, var(--c-accent));
}

/* ---------- 07 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 7vw, 96px);
  border-top: var(--bw) solid var(--line);
  background: linear-gradient(180deg, var(--c-stand) 0%, var(--c-night) 72%);
}

.footer__inner {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 1.9fr);
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(40px, 5vw, 72px) clamp(28px, 3vw, 40px);
}

.footer__brand-link { display: inline-flex; align-items: center; gap: 12px; }
.footer__brand-name { font-size: 20px; font-weight: 700; letter-spacing: 0.02em; color: var(--c-white); }

.footer__tagline { margin-top: 14px; font-size: var(--fs-small); color: var(--c-muted); }

.footer__rhythm {
  margin-top: 14px;
  padding-left: 12px;
  border-left: var(--bw) solid var(--c-amber);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--c-amber);
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}
.footer__col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--c-muted);
}
.footer__list { display: grid; gap: 10px; }
.footer__link {
  display: inline-block;
  font-size: 15px;
  color: var(--c-mint);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.footer__link:hover { color: var(--c-neon); border-color: var(--c-neon); }

.footer__rail {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 26px;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  opacity: 0.55;
}
.footer__tick {
  flex: 1 1 0;
  height: 8px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-brand), transparent);
}
.footer__tick:nth-child(3n) { height: 20px; background: linear-gradient(180deg, var(--c-neon), transparent); }
.footer__tick:nth-child(4n) { height: 13px; }
.footer__tick:nth-child(5n) { height: 5px; }

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: 18px;
  padding-block: 22px 28px;
  border-top: 1px solid var(--line-soft);
}
.footer__contact {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-size: 12.5px;
  color: var(--c-muted);
}
.footer__icp { font-family: var(--font-mono); letter-spacing: 0.06em; }
.footer__copy { font-family: var(--font-mono); letter-spacing: 0.06em; }

/* ---------- 08 通用组件 ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 2.2vw, 26px);
  border: var(--bw) solid var(--line);
  border-radius: var(--r-card);
  background: var(--c-card);
  box-shadow: var(--shadow-hard-sm);
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}
.card:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-hover); border-color: var(--c-neon); }

.card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 10px;
}
.card__title { font-size: var(--fs-h3); font-weight: 700; line-height: 1.3; }
.card__meta {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.12em;
  color: var(--c-muted);
}
.card__body { color: var(--c-mint); font-size: 15px; }
.card__foot {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  justify-content: space-between;
}

.stat { display: flex; flex-direction: column; gap: 8px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}
.stat__label { font-size: 13px; line-height: 1.6; color: var(--c-muted); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(23, 164, 107, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-mint);
  white-space: nowrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--line-soft);
  background: rgba(14, 59, 42, 0.6);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}
.tag--accent { border-color: rgba(255, 122, 26, 0.5); color: var(--c-amber); background: rgba(255, 122, 26, 0.1); }

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 0 4px rgba(53, 230, 140, 0.14);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(53, 230, 140, 0.14); }
  50% { box-shadow: 0 0 0 8px rgba(53, 230, 140, 0.04); }
}

.list-index { display: grid; }
.list-index__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px 18px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}
.list-index__num {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.16em;
  color: var(--c-muted);
}
.list-index__title { font-size: 16px; font-weight: 600; color: var(--c-white); }
.list-index__meta {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.08em;
  color: var(--c-amber);
}

/* ---------- 09 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--bw) solid var(--line);
  border-radius: var(--r-card);
  background: linear-gradient(150deg, var(--c-deep), var(--c-night));
  box-shadow: var(--shadow-hard);
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.media:hover { border-color: var(--c-neon); }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--wide { aspect-ratio: 21 / 9; }

.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}
.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-mint);
  background: linear-gradient(180deg, transparent, rgba(6, 17, 12, 0.9));
}

/* ---------- 10 动效 ---------- */
.js .reveal {
  opacity: 0;
  transform: translate3d(0, 12px, 0);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

.to-index {
  position: fixed;
  right: clamp(14px, 2.2vw, 28px);
  bottom: clamp(14px, 2.2vw, 28px);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: var(--bw) solid var(--c-brand);
  border-radius: var(--r-pill);
  background: rgba(11, 26, 19, 0.94);
  color: var(--c-mint);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  box-shadow: var(--shadow-hard-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease),
    visibility var(--t-mid) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.to-index[data-active="true"] { opacity: 1; visibility: visible; transform: none; }
.to-index:hover { border-color: var(--c-neon); color: var(--c-white); box-shadow: var(--shadow-hover); }
.to-index__mark { color: var(--c-neon); font-size: 14px; }
.to-index__text { white-space: nowrap; }

/* ---------- 11 响应式 ---------- */
@media (max-width: 1279px) {
  .nav-capsule__utility { display: none; }
}

@media (max-width: 1199px) {
  .brand__tagline { display: none; }
}

@media (max-width: 1023px) {
  .header-tools .btn { display: inline-flex; }
  .nav-toggle { display: inline-flex; }

  .nav-capsule {
    position: absolute;
    top: calc(100% - 6px);
    left: clamp(12px, 2vw, 24px);
    right: clamp(12px, 2vw, 24px);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 14px;
    padding: 16px;
    border-radius: 22px;
    background: rgba(11, 26, 19, 0.98);
    box-shadow: var(--shadow-hard);
    max-height: min(72vh, 560px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease),
      visibility var(--t-mid) var(--ease);
  }
  .nav-capsule[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .nav-capsule__list { flex-direction: column; align-items: stretch; gap: 6px; overflow: visible; }
  .nav-link {
    display: block;
    padding: 13px 14px;
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    background: rgba(23, 164, 107, 0.06);
    font-size: 16px;
    color: var(--c-white);
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] { border-color: var(--c-neon); background: rgba(53, 230, 140, 0.14); }

  .nav-capsule__utility {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 14px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line-soft);
  }
  .nav-utility__link { padding: 11px 14px; border: 1px dashed var(--line-soft); border-radius: 12px; }

  .footer__inner { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .footer__nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .footer__base { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .list-index__item { grid-template-columns: auto minmax(0, 1fr); }
  .list-index__meta { grid-column: 2; }
}

@media (max-width: 600px) {
  .brand { padding: 6px 14px 6px 8px; gap: 8px; }
  .brand__mark { width: 26px; height: 26px; }
  .brand__name { font-size: 15px; }
  .header-tools__cta { padding: 8px 12px; font-size: 12.5px; }
  .nav-toggle__label { display: none; }
  .nav-toggle { padding: 9px 12px; }
  .footer__nav { grid-template-columns: minmax(0, 1fr); gap: 22px; }
}

@media (max-width: 420px) {
  .brand__text { display: none; }
  .brand { padding: 6px 8px; }
}

/* ---------- 12 无障碍与偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
  .card:hover, .btn:hover, .brand:hover { transform: none; }
  .to-index { transition: none; }
}