/* ============================================================
   利升体育 · 共享样式表 /assets/site.css
   夜间赛场指挥台：墨绿底 + 电光青柠脉冲 + 暖金时间标记
   ============================================================ */

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

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

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

ul, ol { padding: 0; list-style: none; }

img, svg, video, canvas { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
}

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B1F1A;
  --char: #101315;
  --night: #16232B;
  --lime: #C6FF3D;
  --lime-veil: rgba(198, 255, 61, 0.14);
  --gold: #F2B23C;
  --mist: #E8F1EC;
  --sage: #8FA79C;
  --rule: #2C3A38;
  --live: #FF6B4A;

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

  --wrap: 1240px;
  --gut: clamp(18px, 4vw, 44px);
  --sec: clamp(48px, 7vw, 96px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(112deg, rgba(198, 255, 61, 0.045) 0 1px, transparent 1px 26px),
    radial-gradient(120% 70% at 88% -12%, rgba(242, 178, 60, 0.12), transparent 58%),
    radial-gradient(100% 62% at -6% 104%, rgba(198, 255, 61, 0.08), transparent 56%);
  color: var(--mist);
  font-family: var(--font-sans);
  font-size: clamp(15px, 0.55vw + 13.6px, 17px);
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.005em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--mist);
}

::selection { background: var(--lime); color: var(--char); }

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

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin-block: clamp(24px, 3vw, 40px);
}

/* ---------- 4. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.section {
  position: relative;
  padding-block: var(--sec);
}

.section--tight { padding-block: clamp(26px, 4vw, 52px); }

.section__head { margin-bottom: clamp(22px, 3vw, 40px); }

.section__title {
  font-size: clamp(26px, 3.6vw, 46px);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.section__lead {
  max-width: 60ch;
  margin-top: 14px;
  color: var(--sage);
  font-size: 15.5px;
  line-height: 1.85;
}

.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)); }

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 200;
  transform: translate(-50%, -160%);
  background: var(--lime);
  color: var(--char);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.04em;
  padding: 12px 22px;
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
  outline-offset: -4px;
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  background: linear-gradient(180deg, #131A19 0%, var(--char) 46%, var(--ink) 100%);
  border-bottom: 1px solid var(--rule);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--lime) 0 16%,
    var(--rule) 16% 62%,
    var(--gold) 62% 78%,
    var(--rule) 78% 100%
  );
}

.header-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: clamp(12px, 3vw, 40px);
  padding-top: clamp(18px, 2.8vw, 30px);
  padding-bottom: clamp(8px, 1.2vw, 14px);
}

.masthead-rail {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: clamp(10px, 0.85vw, 11.5px);
  letter-spacing: 0.16em;
  line-height: 1.5;
  color: var(--sage);
}

.masthead-rail--end {
  align-items: flex-end;
  text-align: right;
}

.mono-tag { display: block; }

.masthead-rail--start .mono-tag::before,
.masthead-rail--end .mono-tag::after {
  content: "";
  display: inline-block;
  width: 10px;
  height: 2px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--gold);
}

.masthead-rail--end .mono-tag::after {
  margin-right: 0;
  margin-left: 8px;
  background: var(--lime);
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.42em;
}

.brand-lockup__cn {
  font-size: clamp(28px, 5.2vw, 54px);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}

.brand-lockup__en {
  font-family: var(--font-mono);
  font-size: clamp(9px, 0.85vw, 11px);
  letter-spacing: 0.44em;
  text-indent: 0.44em;
  color: var(--lime);
}

.brand-lockup:hover .brand-lockup__cn { color: var(--lime); }

.header-tagline {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 0 var(--gut) clamp(12px, 1.8vw, 20px);
  text-align: center;
  font-family: var(--font-mono);
  font-size: clamp(10px, 0.9vw, 12.5px);
  letter-spacing: 0.2em;
  text-indent: 0.2em;
  color: var(--gold);
}

.nav-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  padding-bottom: clamp(14px, 1.8vw, 20px);
}

.primary-nav { min-width: 0; }

.nav-strip {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--rule);
  background: linear-gradient(180deg, rgba(22, 35, 43, 0.92), rgba(16, 19, 21, 0.92));
}

.nav-strip__seg { display: flex; align-items: stretch; }

.nav-strip__seg + .nav-strip__seg {
  border-left: 1px dashed var(--rule);
}

.nav-strip a {
  position: relative;
  display: flex;
  align-items: center;
  padding: 12px clamp(10px, 1.2vw, 17px);
  font-size: clamp(13px, 0.95vw, 15px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--mist);
  white-space: nowrap;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.nav-strip a::after {
  content: "";
  position: absolute;
  left: clamp(10px, 1.2vw, 17px);
  right: clamp(10px, 1.2vw, 17px);
  bottom: 8px;
  height: 1px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s var(--ease);
}

.nav-strip a:hover,
.nav-strip a:focus-visible {
  background: var(--lime-veil);
  color: var(--lime);
}

.nav-strip a:hover::after,
.nav-strip a:focus-visible::after { transform: scaleX(1); }

.nav-strip a[aria-current="page"] {
  background: var(--lime);
  color: var(--char);
  font-weight: 800;
}

.nav-strip a[aria-current="page"]::after { display: none; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  border: 1px solid var(--rule);
  background: var(--night);
  color: var(--mist);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.nav-toggle:hover { border-color: var(--lime); color: var(--lime); }

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: var(--lime);
  transition: transform 0.22s var(--ease), opacity 0.18s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.subscribe-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--gold);
  background: linear-gradient(180deg, rgba(242, 178, 60, 0.16), rgba(242, 178, 60, 0.04));
  color: var(--mist);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: background 0.2s var(--ease);
}

.subscribe-chip__dot {
  flex: none;
  width: 7px;
  height: 7px;
  background: var(--gold);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

.subscribe-chip__label { font-weight: 700; }

.subscribe-chip__time {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.subscribe-chip:hover { background: rgba(242, 178, 60, 0.26); }

.nav-cta { flex: none; }

.scroll-progress {
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 90;
  width: 0;
  height: 3px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--lime), var(--gold));
  box-shadow: 0 0 12px rgba(198, 255, 61, 0.45);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(242, 178, 60, 0.5); }
  50% { opacity: 0.55; box-shadow: 0 0 0 6px rgba(242, 178, 60, 0); }
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--sec);
  background: linear-gradient(180deg, var(--char) 0%, #080B0C 100%);
  border-top: 1px solid var(--rule);
  color: var(--mist);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(
    90deg,
    var(--gold) 0 11%,
    var(--rule) 11% 66%,
    var(--lime) 66% 100%
  );
  opacity: 0.9;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 2.4fr);
  gap: clamp(28px, 5vw, 72px);
  padding-top: clamp(44px, 6vw, 78px);
  padding-bottom: clamp(32px, 4vw, 54px);
}

.footer-sign__cn {
  display: block;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--mist);
}

.footer-sign__en {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--lime);
}

.footer-sign__note {
  margin-top: 18px;
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--sage);
}

.footer-sign__btn { margin-top: 22px; }

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}

.footer-col__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.footer-list > li { margin-bottom: 9px; }

.footer-list a {
  font-size: 14px;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.footer-list a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.footer-static {
  font-size: 14px;
  color: var(--sage);
}

.contact-line { margin-bottom: 14px; }

.contact-line__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.contact-line__val {
  display: block;
  margin-top: 3px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
  word-break: break-word;
}

.contact-line__sub {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  color: var(--sage);
}

.contact-line--link a {
  display: inline-block;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--lime);
  border-bottom: 1px solid rgba(198, 255, 61, 0.5);
}

.contact-line--link a:hover { border-bottom-color: var(--lime); }

.footer-base { border-top: 1px solid var(--rule); }

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  padding-top: 18px;
  padding-bottom: 26px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sage);
}

.footer-base__legal { color: var(--mist); }

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  padding: 13px 24px;
  border: 1px solid transparent;
  font-size: 14.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.3;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.btn--primary { background: var(--lime); color: var(--char); }
.btn--primary:hover { background: #D9FF78; transform: translateY(-1px); }

.btn--gold { background: var(--gold); color: var(--char); }
.btn--gold:hover { background: #FFC75C; transform: translateY(-1px); }

.btn--ghost {
  border-color: var(--rule);
  background: rgba(22, 35, 43, 0.6);
  color: var(--mist);
}

.btn--ghost:hover { border-color: var(--lime); color: var(--lime); }

/* ---------- 9. 章节色带与面包屑 ---------- */
.chapter-band {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: clamp(24px, 3.4vw, 44px);
  padding-block: 10px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.chapter-band__no {
  flex: none;
  padding: 3px 9px;
  border: 1px solid rgba(242, 178, 60, 0.5);
  background: rgba(242, 178, 60, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.chapter-band__title {
  font-size: clamp(13px, 0.95vw, 14px);
  letter-spacing: 0.18em;
  color: var(--sage);
}

.chapter-band__spacer {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--rule), transparent);
}

.breadcrumb {
  padding-top: clamp(18px, 2.6vw, 28px);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sage);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--rule);
}

.breadcrumb a { color: var(--sage); }
.breadcrumb a:hover { color: var(--lime); }
.breadcrumb [aria-current="page"] { color: var(--mist); }

/* ---------- 10. 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: clamp(15.5px, 0.8vw + 12.8px, 17.5px);
  line-height: 1.85;
  color: var(--mist);
}

.prose > * + * { margin-top: 1.15em; }

.prose h2 {
  margin-top: 2em;
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.prose h3 {
  margin-top: 1.6em;
  font-size: clamp(18px, 1.7vw, 22px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.prose a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.prose strong { color: #FFFFFF; font-weight: 700; }

.prose ul { padding-left: 1.5em; }

.prose ul li { position: relative; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: -1.2em;
  top: 0.78em;
  width: 9px;
  height: 2px;
  background: var(--lime);
}

.prose ol {
  padding-left: 1.5em;
  list-style: decimal;
}

.prose ol li::marker {
  color: var(--gold);
  font-family: var(--font-mono);
}

.prose li + li { margin-top: 0.5em; }

.prose blockquote {
  padding-left: 1.1em;
  border-left: 2px solid var(--gold);
  color: var(--sage);
}

.lead {
  font-size: clamp(16.5px, 1vw + 13.6px, 19px);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 11. 卡片与标签 ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--rule);
  background: var(--night);
}

.card--paper {
  background: linear-gradient(180deg, rgba(232, 241, 236, 0.07), rgba(232, 241, 236, 0.02));
  box-shadow: 0 16px 0 -10px rgba(0, 0, 0, 0.4);
}

.card__title {
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.card__meta {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.card__text {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sage);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--sage);
}

.tag--live { border-color: var(--live); color: var(--live); }
.tag--lime { border-color: rgba(198, 255, 61, 0.5); color: var(--lime); }
.tag--gold { border-color: rgba(242, 178, 60, 0.55); color: var(--gold); }

/* ---------- 12. 图形容器（供页面阶段放图） ---------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--rule);
  background: linear-gradient(140deg, var(--night), var(--char));
}

.figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    125deg,
    rgba(198, 255, 61, 0.07) 0 1px,
    transparent 1px 14px
  );
}

.figure__media {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--night);
}

.figure__media--wide { aspect-ratio: 21 / 9; }
.figure__media--portrait { aspect-ratio: 4 / 5; }

.figure__caption {
  position: relative;
  z-index: 2;
  padding: 10px 14px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--sage);
  background: rgba(11, 31, 26, 0.85);
}

.figure--overlay .figure__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  border-top: 0;
  background: linear-gradient(180deg, transparent, rgba(11, 31, 26, 0.94));
  padding-top: 34px;
}

/* ---------- 13. 折叠面板 ---------- */
.acc {
  border: 1px solid var(--rule);
  background: rgba(22, 35, 43, 0.5);
}

.acc + .acc { border-top: 0; }

.acc__sum {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px clamp(14px, 2vw, 22px);
  font-size: 15.5px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}

.acc__sum::-webkit-details-marker { display: none; }
.acc__sum:hover { color: var(--lime); background: var(--lime-veil); }

.acc__sum::after {
  content: "";
  flex: none;
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--lime);
  border-bottom: 2px solid var(--lime);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.22s var(--ease);
}

.acc[open] > .acc__sum::after {
  transform: rotate(225deg) translate(-1px, -1px);
}

.acc__body {
  max-width: 68ch;
  padding: 0 clamp(14px, 2vw, 22px) 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sage);
}

/* ---------- 14. 工具类 ---------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.02em;
}

.v-label {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--sage);
}

.pulse-line { display: block; width: 100%; height: auto; }

.pulse-line path {
  fill: none;
  stroke: var(--lime);
  stroke-width: 1.5;
  stroke-linecap: square;
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: pulse-draw 1.6s ease-out forwards;
}

@keyframes pulse-draw {
  to { stroke-dashoffset: 0; }
}

/* ---------- 15. 显现动效 ---------- */
html[data-reveal-ready] [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.62s var(--ease), transform 0.62s var(--ease);
}

html[data-reveal-ready] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1180px) {
  .nav-cta { display: none; }
  .nav-row { grid-template-columns: minmax(0, 1fr) auto; }
}

@media (max-width: 1020px) {
  .nav-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
  }

  .nav-toggle { display: inline-flex; order: 1; }

  .subscribe-chip { order: 2; margin-left: auto; }

  .primary-nav {
    order: 3;
    flex: 1 0 100%;
    display: none;
    border: 1px solid var(--rule);
    background: var(--char);
  }

  .primary-nav[data-open] { display: block; }

  .nav-strip {
    flex-direction: column;
    border: 0;
    background: transparent;
  }

  .nav-strip__seg { flex-direction: column; align-items: stretch; }

  .nav-strip__seg + .nav-strip__seg {
    border-left: 0;
    border-top: 1px dashed var(--rule);
  }

  .nav-strip a {
    padding: 14px 18px;
    font-size: 15px;
    white-space: normal;
  }

  .nav-strip a::after { display: none; }

  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .masthead-rail { display: none; }

  .header-grid {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 20px;
  }

  .header-tagline {
    font-size: 10px;
    letter-spacing: 0.14em;
    text-indent: 0.14em;
  }

  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

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

  .subscribe-chip__time { display: none; }

  .footer-base__inner { flex-direction: column; align-items: flex-start; }
}

/* ---------- 17. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  html[data-reveal-ready] [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .pulse-line path {
    animation: none !important;
    stroke-dashoffset: 0 !important;
  }

  .scroll-progress { transition: none !important; }
}