/* ==========================================================================
   浩瀚体育主站 — 共享样式表 /assets/site.css
   深海蓝 × 炽热橙 × 电光青，极简文字建筑，发丝边界与等宽数据
   ========================================================================== */

:root {
  --deep: #071A2F;
  --night: #0E2A47;
  --orange: #FF5A1F;
  --cyan: #35E0D0;
  --warm: #F7F3EA;
  --paper: #FFFFFF;
  --mist: #C7D0D9;
  --ink: #0B0B0F;
  --amber: #FFB020;

  --line: rgba(199, 208, 217, 0.22);
  --line-strong: rgba(199, 208, 217, 0.4);
  --line-dark: rgba(11, 11, 15, 0.14);

  --shell: 1180px;
  --shell-wide: 1360px;
  --radius: 4px;
  --radius-lg: 10px;
  --shadow-soft: 0 1px 0 rgba(255, 255, 255, 0.04), 0 22px 48px -32px rgba(0, 0, 0, 0.85);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --t-fast: 180ms;
  --t-mid: 280ms;
  --t-slow: 420ms;

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

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

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

body {
  margin: 0;
  background: var(--deep);
  color: var(--warm);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
p { margin: 0 0 1em; }

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

#main-content { display: block; }
:target { scroll-margin-top: 96px; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.mono { font-family: var(--font-mono); letter-spacing: 0.06em; }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -72px;
  z-index: 300;
  padding: 11px 20px;
  background: var(--orange);
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius);
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: 14px; }

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 200;
  background: rgba(255, 255, 255, 0.07);
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  will-change: transform;
}

/* ---------- 内容容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}
.shell--wide { max-width: var(--shell-wide); }
.container { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 24px; }

/* ---------- 头部：快捷带 ---------- */
.site-header { position: relative; z-index: 120; }

.utility-strip {
  background: var(--night);
  border-bottom: 1px solid var(--line);
}
.utility-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  flex-wrap: wrap;
  min-height: 40px;
  padding-top: 4px;
  padding-bottom: 4px;
}
.utility-strip__note {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}
.pulse-dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 224, 208, 0.16);
}
.quick-nav { display: flex; gap: 24px; }
.quick-nav__link {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
  transition: color var(--t-fast) var(--ease);
}
.quick-nav__link:hover { color: var(--cyan); }

/* ---------- 头部：居中报头 ---------- */
.masthead {
  padding: 32px 0 24px;
  text-align: center;
  background: var(--deep);
}
.masthead__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.brand {
  display: inline-flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--warm);
}
.brand__mark {
  font-size: clamp(30px, 5.4vw, 54px);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1;
  transition: color var(--t-fast) var(--ease);
}
.brand:hover .brand__mark { color: var(--paper); }
.brand__tag {
  margin-top: 0.3em;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange);
  background: rgba(255, 90, 31, 0.1);
  border: 1px solid rgba(255, 90, 31, 0.5);
  border-radius: 999px;
}
.masthead__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.32em;
  color: var(--mist);
  text-transform: uppercase;
}

/* ---------- 头部：栏目线 ---------- */
.nav-bar {
  background: linear-gradient(180deg, rgba(14, 42, 71, 0.75), rgba(7, 26, 47, 0.96));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line-strong);
}
.nav-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 60px;
}
.primary-nav { margin: 0 auto; }
.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.primary-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
  border-radius: 2px;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.primary-nav__link:hover {
  color: var(--paper);
  background: rgba(53, 224, 208, 0.09);
}
.primary-nav__link[aria-current="page"] { color: var(--orange); }
.primary-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 3px;
  height: 2px;
  background: var(--orange);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--warm);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.nav-toggle[aria-expanded="true"] {
  color: var(--orange);
  border-color: rgba(255, 90, 31, 0.6);
}
.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); }

.nav-bar__cta {
  flex: none;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  background: var(--orange);
  border-radius: 999px;
  transition: background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.nav-bar__cta:hover { background: #FF7040; transform: translateY(-1px); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.btn--primary { background: var(--orange); color: var(--ink); }
.btn--primary:hover { background: #FF7040; transform: translateY(-2px); }
.btn--ghost { color: var(--warm); border-color: var(--line-strong); }
.btn--ghost:hover { color: var(--cyan); border-color: rgba(53, 224, 208, 0.6); }
.btn--quiet {
  color: var(--cyan);
  background: rgba(53, 224, 208, 0.1);
  border-color: rgba(53, 224, 208, 0.35);
}
.btn--quiet:hover { background: rgba(53, 224, 208, 0.18); transform: translateY(-2px); }
.btn--sm { padding: 9px 16px; font-size: 13.5px; }

/* ---------- 分区与色彩节奏 ---------- */
.section { padding: clamp(56px, 8vw, 112px) 0; }
.section--deep { background: var(--deep); color: var(--warm); }
.section--night { background: var(--night); color: var(--warm); }
.section--warm,
.section--paper {
  --line: var(--line-dark);
  --line-strong: rgba(11, 11, 15, 0.26);
  --mist: #5A6672;
  background: var(--warm);
  color: var(--ink);
}
.section--paper { background: var(--paper); }
.section--warm .file-card,
.section--paper .file-card { background: var(--paper); }
.section--warm .disclosure,
.section--paper .disclosure { background: var(--paper); }
.section--warm .data-bar,
.section--paper .data-bar { background: rgba(11, 11, 15, 0.1); }
.section--warm .section-head__index,
.section--paper .section-head__index { -webkit-text-stroke-color: var(--orange); }

/* ---------- 章节头 ---------- */
.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(16px, 3vw, 46px);
  align-items: start;
  margin-bottom: clamp(28px, 4vw, 54px);
}
.section-head__index {
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.8vw, 66px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--orange);
}
@supports (-webkit-text-stroke: 1px #000) {
  .section-head__index {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--orange);
  }
}
.section-head__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--cyan);
}
.section-head__title { margin: 0 0 0.35em; font-size: clamp(28px, 4.6vw, 52px); }
.section-head__note {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 正文 ---------- */
.prose { max-width: 38em; font-size: 17.5px; line-height: 1.8; }
.prose--wide { max-width: 46em; }
.prose p { margin: 0 0 1.15em; }
.prose h2 { margin: 1.8em 0 0.6em; font-size: clamp(26px, 3.4vw, 38px); }
.prose h3 { margin: 1.5em 0 0.5em; font-size: 20px; letter-spacing: -0.02em; }
.prose ul { display: grid; gap: 10px; margin: 0 0 1.3em; padding-left: 0; }
.prose ul > li {
  position: relative;
  padding-left: 20px;
}
.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--orange);
}
.prose a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.prose a:hover { color: var(--orange); }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.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)); }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--9-3 { grid-template-columns: 9fr 3fr; }
.grid--drift > :nth-child(2n) { margin-top: clamp(18px, 4vw, 56px); }

/* ---------- 档案卡 ---------- */
.file-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 13px;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--night);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease);
}
.file-card:hover {
  transform: translateY(-3px);
  border-color: rgba(53, 224, 208, 0.5);
  box-shadow: var(--shadow-soft);
}
.file-card--accent {
  background: linear-gradient(158deg, rgba(255, 90, 31, 0.18), rgba(14, 42, 71, 0.94));
  border-color: rgba(255, 90, 31, 0.42);
}
.file-card__index {
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.file-card__tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.file-card__title { font-size: clamp(19px, 2vw, 24px); letter-spacing: -0.025em; }
.file-card__body { margin: 0; font-size: 15.5px; line-height: 1.7; color: var(--mist); }
.file-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.file-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

/* ---------- 标签 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  white-space: nowrap;
  color: var(--mist);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}
.chip--cyan { color: var(--cyan); background: rgba(53, 224, 208, 0.08); border-color: rgba(53, 224, 208, 0.45); }
.chip--orange { color: var(--orange); background: rgba(255, 90, 31, 0.1); border-color: rgba(255, 90, 31, 0.5); }
.chip--amber { color: var(--amber); background: rgba(255, 176, 32, 0.1); border-color: rgba(255, 176, 32, 0.45); }

/* ---------- 时间轴 ---------- */
.timeline {
  position: relative;
  display: grid;
  gap: 26px;
  padding-left: 30px;
  border-left: 1px solid var(--line-strong);
}
.timeline__item { position: relative; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--cyan);
}
.timeline__item--hot::before { background: var(--orange); border-color: var(--orange); }
.timeline__time {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.timeline__title { margin: 6px 0 4px; font-size: 19px; letter-spacing: -0.02em; }
.timeline__text { margin: 0; font-size: 15.5px; line-height: 1.7; color: var(--mist); }

/* ---------- 数据条 ---------- */
.data-bar {
  position: relative;
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(199, 208, 217, 0.16);
}
.data-bar__fill {
  display: block;
  height: 100%;
  width: var(--fill, 0%);
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transition: width var(--t-slow) var(--ease);
}

/* ---------- 可展开内容组 ---------- */
.disclosure {
  background: rgba(14, 42, 71, 0.5);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.disclosure__trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 20px;
  text-align: left;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.disclosure__trigger:hover { background: rgba(53, 224, 208, 0.08); color: var(--cyan); }
.disclosure__index {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}
.disclosure__icon {
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform var(--t-mid) var(--ease);
}
.disclosure__trigger[aria-expanded="true"] .disclosure__icon { transform: rotate(45deg); }
.disclosure__panel {
  padding: 0 20px 20px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}
.disclosure__panel[hidden] { display: none; }

/* ---------- 面包屑 ---------- */
.crumbs { padding-top: 22px; }
.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.crumbs__sep { color: rgba(199, 208, 217, 0.45); }
.crumbs__link { transition: color var(--t-fast) var(--ease); }
.crumbs__link:hover { color: var(--cyan); }
.crumbs__item[aria-current="page"] { color: var(--warm); }

/* ---------- 图片容器基础 ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(142deg, var(--night), var(--deep) 58%, rgba(53, 224, 208, 0.16));
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media__img { width: 100%; height: 100%; object-fit: cover; }
.media__glow {
  position: absolute;
  right: -12%;
  bottom: -32%;
  width: 62%;
  height: 72%;
  pointer-events: none;
  background: radial-gradient(circle at 70% 70%, rgba(255, 90, 31, 0.38), transparent 70%);
}
.media__caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--warm);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.65);
}

/* ---------- 渐显 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}
html.js-reveal [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--deep);
  border-top: 1px solid var(--line-strong);
  padding: clamp(44px, 6vw, 78px) 0 26px;
  color: var(--warm);
}
.footer__inner { width: 100%; }

.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 2fr);
  gap: clamp(28px, 4vw, 62px);
  padding-bottom: clamp(30px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}
.footer__wordmark {
  display: inline-block;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 900;
  letter-spacing: -0.045em;
  transition: color var(--t-fast) var(--ease);
}
.footer__wordmark:hover { color: var(--orange); }
.footer__claim {
  margin: 14px 0 18px;
  max-width: 32ch;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--mist);
}
.footer__chips { display: flex; flex-wrap: wrap; gap: 10px; }

.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 38px);
}
.footer__heading {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer__list { display: grid; gap: 10px; font-size: 15px; }
.footer__list a {
  display: inline-block;
  color: var(--mist);
  transition: color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.footer__list a:hover { color: var(--warm); transform: translateX(4px); }

.footer__contact {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 38px);
  padding: clamp(24px, 3vw, 38px) 0;
  border-bottom: 1px solid var(--line);
}
.contact-block__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}
.contact-block__value {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  word-break: break-word;
}
.contact-block__value--mono { font-family: var(--font-mono); font-size: 15px; color: var(--cyan); }
.contact-block__note {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 6px 13px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--mist);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.copy-btn:hover { color: var(--cyan); border-color: rgba(53, 224, 208, 0.5); }
.copy-btn[data-state="done"] { color: var(--orange); border-color: rgba(255, 90, 31, 0.55); }
.copy-btn__label { white-space: nowrap; }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.footer__fine { margin: 0; }
.footer__legal { display: flex; flex-wrap: wrap; gap: 20px; }
.footer__legal a { transition: color var(--t-fast) var(--ease); }
.footer__legal a:hover { color: var(--cyan); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--7-5, .grid--5-7, .grid--8-4, .grid--9-3 { grid-template-columns: 1fr; }
  .grid--drift > :nth-child(2n) { margin-top: 0; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    padding: 6px 0 16px;
    background: var(--night);
    border-bottom: 1px solid var(--line-strong);
    box-shadow: var(--shadow-soft);
  }
  .primary-nav[data-open] { display: block; }
  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 18px;
  }
  .primary-nav__link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }
  .primary-nav__link[aria-current="page"]::after { left: 4px; right: auto; width: 22px; bottom: 8px; }
  .nav-bar__inner { justify-content: space-between; }
  .primary-nav { margin: 0; }
  .footer__top { grid-template-columns: 1fr; }
  .footer__nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .shell, .container { padding: 0 18px; }
  .masthead { padding: 24px 0 18px; }
  .masthead__kicker { letter-spacing: 0.2em; }
  .utility-strip__inner { justify-content: center; }
  .quick-nav { gap: 16px; }
  .section-head { grid-template-columns: 1fr; gap: 12px; }
  .section-head__index { font-size: 40px; }
  .footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__contact { grid-template-columns: 1fr; }
  .footer__bottom { justify-content: flex-start; }
}

@media (max-width: 600px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

@media (max-width: 460px) {
  .nav-toggle__label { display: none; }
  .nav-bar__cta { padding: 9px 14px; font-size: 13px; }
  .footer__nav { grid-template-columns: 1fr; }
}

/* ---------- 动效偏好 ---------- */
@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;
    scroll-behavior: auto !important;
  }
  html.js-reveal [data-reveal] { opacity: 1; transform: none; }
}