/* =========================================================
   多宝体育赛事 · DUOBAO GOAL
   /assets/site.css — 共享外壳与通用组件
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 112px;
}

body { margin: 0; }

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%; }

button, input, select, textarea { font: inherit; color: inherit; }

a { color: inherit; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色彩 */
  --ink-900: #0B1230;
  --ink-700: #161F45;
  --ink-500: #2A3A76;
  --orange: #FF5A1F;
  --orange-soft: #FFA36B;
  --cyan: #2BEFD2;
  --gold: #F3C56B;
  --paper: #F4F1E9;
  --paper-dim: rgba(244, 241, 233, 0.82);
  --black: #0A0D18;
  --slate: #93A0C4;
  --clay: #C2542F;

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

  /* 尺度 */
  --max: 1280px;
  --gutter: clamp(16px, 4vw, 40px);
  --r-sm: 2px;
  --r-md: 4px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --shadow-paper:
    6px 6px 0 -1px var(--ink-700),
    7px 7px 0 0 var(--ink-500),
    14px 14px 0 -2px var(--ink-700),
    15px 15px 0 -1px rgba(42, 58, 118, 0.55),
    0 30px 44px -30px #000;
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 560px at 88% -8%, rgba(43, 239, 210, 0.06), transparent 62%),
    radial-gradient(900px 520px at 2% 4%, rgba(255, 90, 31, 0.07), transparent 66%),
    repeating-linear-gradient(112deg, rgba(194, 84, 47, 0.045) 0 1px, transparent 1px 72px);
  background-attachment: fixed;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.16;
  color: var(--paper);
}

h1 { font-size: clamp(32px, 5vw, 56px); }
h2 { font-size: clamp(24px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 28px); }
h4 { font-size: clamp(17px, 1.8vw, 22px); }

p { margin: 0 0 1.2em; }

p a, li a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

strong { color: var(--paper); font-weight: 700; }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

/* ---------- 4. 可访问性 ---------- */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: top 150ms var(--ease);
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 5. 容器与栅格 ---------- */
.u-shell {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 24px);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.section {
  padding-block: clamp(40px, 6vw, 80px);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
  margin-bottom: clamp(20px, 3vw, 34px);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink-500);
}

/* ---------- 6. 通用标签 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.dot {
  display: inline-block;
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(43, 239, 210, 0.18);
}

.dot--gold {
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(243, 197, 107, 0.18);
}

.dot--orange {
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.2);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--ink-500);
  border-radius: var(--r-sm);
  background: rgba(22, 31, 69, 0.82);
  color: var(--slate);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.6;
  white-space: nowrap;
}

.tag--accent {
  border-color: rgba(255, 90, 31, 0.5);
  background: rgba(255, 90, 31, 0.12);
  color: var(--orange-soft);
}

.tag--gold {
  border-color: rgba(243, 197, 107, 0.5);
  background: rgba(243, 197, 107, 0.1);
  color: var(--gold);
}

.tag--paper {
  border-color: transparent;
  background: var(--paper);
  color: var(--black);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  font-size: 13px;
  color: var(--slate);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: background-color 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.btn:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--cyan), inset 0 0 0 4px rgba(11, 18, 48, 0.6);
}

.btn--accent {
  background: var(--orange);
  color: var(--ink-900);
}

.btn--accent:hover {
  background: var(--orange-soft);
}

.btn--ghost {
  background: rgba(22, 31, 69, 0.9);
  border-color: var(--ink-500);
  color: var(--paper);
}

.btn--ghost:hover {
  background: var(--ink-500);
  border-color: var(--cyan);
}

.btn--paper {
  background: var(--paper);
  color: var(--black);
}

.btn--paper:hover {
  background: #fff;
}

.btn--sm {
  padding: 8px 13px;
  font-size: 13px;
}

.btn--block {
  display: flex;
  width: 100%;
}

/* ---------- 8. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(11, 18, 48, 0);
  border-bottom: 1px solid transparent;
  transition:
    background-color 180ms var(--ease),
    border-color 180ms var(--ease),
    box-shadow 180ms var(--ease);
}

.site-header[data-scrolled="true"] {
  background: rgba(11, 18, 48, 0.95);
  border-bottom-color: var(--ink-500);
  box-shadow: 0 18px 40px -30px #000;
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  backdrop-filter: saturate(140%) blur(12px);
}

.header-rail {
  background: rgba(10, 13, 24, 0.5);
  border-bottom: 1px solid rgba(42, 58, 118, 0.6);
}

.header-rail__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 30px;
  padding-block: 3px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.rail-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.rail-meta--note {
  color: rgba(244, 241, 233, 0.6);
  letter-spacing: 0.06em;
}

.header-main {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 28px);
  min-height: 70px;
  padding-block: 10px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--paper);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-900);
  background: linear-gradient(135deg, var(--cyan) 0%, #18C9B1 58%, var(--orange) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 80%, 80% 100%, 0 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand__latin {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: var(--slate);
}

.brand--footer .brand__mark {
  width: 34px;
  height: 34px;
  font-size: 13px;
}

.brand--footer .brand__name {
  font-size: 17px;
}

/* 主导航 */
.primary-nav {
  display: flex;
  justify-content: center;
  flex: 1 1 auto;
  min-width: 0;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  max-width: 100%;
  padding-block: 3px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.primary-nav__list::-webkit-scrollbar {
  display: none;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #CCD5EF;
  text-decoration: none;
  white-space: nowrap;
  transition: color 150ms var(--ease), background-color 150ms var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 180ms var(--ease);
}

.nav-link:hover {
  color: #fff;
  background: var(--ink-500);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--orange-soft);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-drawer-foot {
  display: none;
}

/* 右上角工具区 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
}

.tool-link {
  padding: 6px 2px;
  border-bottom: 1px dashed rgba(147, 160, 196, 0.45);
  font-size: 13px;
  font-weight: 600;
  color: var(--slate);
  text-decoration: none;
  transition: color 150ms var(--ease), border-color 150ms var(--ease);
}

.tool-link:hover {
  color: var(--paper);
  border-bottom-color: var(--orange);
}

/* 移动端切换按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 14px;
  border: 1px solid var(--ink-500);
  border-radius: var(--r-sm);
  background: var(--ink-700);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color 150ms var(--ease), border-color 150ms var(--ease);
}

.nav-toggle:hover {
  background: var(--ink-500);
  border-color: var(--orange);
}

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 180ms var(--ease), opacity 140ms var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5px) 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(-5px) rotate(-45deg);
}

/* 阅读进度尺 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--orange) 0%, var(--gold) 46%, var(--cyan) 100%);
  pointer-events: none;
}

/* ---------- 9. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  overflow: hidden;
  border-top: 1px solid var(--ink-500);
  background: var(--ink-700);
  color: var(--paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--orange) 0 16%,
    rgba(42, 58, 118, 0) 16% 84%,
    var(--cyan) 84% 100%
  );
  opacity: 0.85;
}

.site-footer::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -46%;
  width: 70%;
  height: 70%;
  background: radial-gradient(closest-side, rgba(194, 84, 47, 0.2), transparent 72%);
  pointer-events: none;
}

.footer-top {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(28px, 4vw, 64px);
  padding-block: clamp(36px, 5vw, 64px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.footer-note {
  max-width: 32ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #AAB4D4;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-col ul {
  display: grid;
  gap: 2px;
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.footer-col__title::before {
  content: "";
  flex: none;
  width: 14px;
  height: 2px;
  background: var(--orange);
}

.footer-link {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: #B3BDDD;
  text-decoration: none;
  transition: color 150ms var(--ease), transform 150ms var(--ease);
}

.footer-link:hover {
  color: var(--paper);
  transform: translateX(3px);
}

.footer-contact {
  position: relative;
  display: grid;
  gap: 18px;
  justify-items: start;
  padding-block: clamp(24px, 3vw, 36px);
  border-top: 1px solid rgba(42, 58, 118, 0.85);
}

.contact-list {
  display: grid;
  gap: 10px;
}

.contact-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
}

.contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.contact-val {
  color: #C3CBE6;
  word-break: break-word;
}

.contact-val.num {
  color: var(--paper);
  font-size: 15px;
  letter-spacing: 0.02em;
}

.service-note {
  max-width: 70ch;
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid rgba(147, 160, 196, 0.45);
  font-size: 13px;
  line-height: 1.75;
  color: #8F9AC0;
}

.footer-legal {
  position: relative;
  padding-block: 16px;
  border-top: 1px solid rgba(42, 58, 118, 0.6);
  background: var(--black);
}

.footer-legal__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-size: 12.5px;
  color: #8B96BD;
}

.legal-sep {
  color: var(--ink-500);
}

/* ---------- 10. 资料卡与档案装置 ---------- */
.paper-card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--black);
  border-radius: var(--r-sm);
  background: var(--paper);
  color: var(--black);
  box-shadow: var(--shadow-paper);
}

.paper-card h2,
.paper-card h3,
.paper-card h4 {
  color: var(--black);
}

.paper-card p {
  color: #1C2130;
}

.paper-card a {
  color: var(--clay);
}

.file-tab {
  position: absolute;
  left: -1px;
  top: -13px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px 4px;
  background: var(--orange);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.scoreboard {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  border: 1px solid var(--ink-500);
  border-left: 3px solid var(--orange);
  border-radius: var(--r-sm);
  background: var(--ink-900);
}

.scoreboard__digits {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.stat {
  display: grid;
  gap: 4px;
}

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.stat__label {
  font-size: 13px;
  color: var(--slate);
}

/* ---------- 11. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--ink-500);
  border-radius: var(--r-sm);
  background:
    linear-gradient(150deg, var(--ink-700), var(--ink-900));
}

.media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(11, 18, 48, 0) 42%, rgba(11, 18, 48, 0.78) 100%);
  pointer-events: none;
}

.media-frame--tall {
  aspect-ratio: 3 / 4;
}

.media-frame--wide {
  aspect-ratio: 21 / 9;
}

/* ---------- 12. 面包屑与正文 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--slate);
}

.breadcrumb a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 150ms var(--ease), border-color 150ms var(--ease);
}

.breadcrumb a:hover {
  color: var(--paper);
  border-bottom-color: var(--orange);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--ink-500);
}

.breadcrumb [aria-current="page"] {
  color: var(--paper);
}

.prose {
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper-dim);
}

.prose h2 {
  margin: 1.6em 0 0.55em;
  font-size: clamp(22px, 2.6vw, 28px);
  color: var(--paper);
}

.prose h3 {
  margin: 1.5em 0 0.5em;
  font-size: clamp(18px, 2vw, 22px);
  color: var(--paper);
}

.prose p {
  margin: 0 0 1.2em;
}

.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.3em;
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin-bottom: 0.4em;
}

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

.prose strong {
  color: var(--paper);
}

.prose--paper {
  max-width: 76ch;
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid var(--black);
  border-radius: var(--r-sm);
  background: var(--paper);
  color: var(--black);
  box-shadow: var(--shadow-paper);
}

.prose--paper h2,
.prose--paper h3,
.prose--paper strong {
  color: var(--black);
}

.prose--paper a {
  color: var(--clay);
}

/* ---------- 13. 折叠组件 ---------- */
details {
  border: 1px solid var(--ink-500);
  border-radius: var(--r-sm);
  background: rgba(22, 31, 69, 0.72);
}

summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::before {
  content: "";
  flex: none;
  width: 0;
  height: 0;
  border-left: 6px solid var(--orange);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform 200ms var(--ease);
}

details[open] > summary::before {
  transform: rotate(90deg);
}

.details__body {
  padding: 0 14px 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-dim);
}

/* ---------- 14. 进入显现 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

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

/* ---------- 15. 断点 ---------- */
@media (max-width: 1200px) {
  .tool-link {
    display: none;
  }
}

@media (max-width: 1080px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-tools {
    display: none;
  }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 3;
    display: none;
    flex-direction: column;
    justify-content: flex-start;
    max-height: calc(100vh - 96px);
    padding: 10px var(--gutter) 22px;
    overflow-y: auto;
    border-top: 1px solid var(--ink-500);
    border-bottom: 1px solid var(--ink-500);
    background: var(--ink-700);
    box-shadow: 0 30px 50px -32px #000;
  }

  .primary-nav[data-open="true"] {
    display: flex;
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: visible;
    padding-block: 0;
  }

  .nav-link {
    padding: 14px 4px;
    border-bottom: 1px solid rgba(42, 58, 118, 0.6);
    border-radius: 0;
    font-size: 16px;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    color: var(--orange);
    background: rgba(255, 90, 31, 0.09);
  }

  .nav-drawer-foot {
    display: block;
    margin-top: 16px;
  }
}

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

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

  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

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

  body {
    background-attachment: scroll;
  }
}

@media (max-width: 720px) {
  .rail-meta--note {
    display: none;
  }

  .brand__mark {
    width: 36px;
    height: 36px;
    font-size: 13px;
  }

  .brand__name {
    font-size: 17px;
  }

  .brand__latin {
    font-size: 9.5px;
    letter-spacing: 0.18em;
  }

  .header-main {
    min-height: 62px;
  }
}

@media (max-width: 560px) {
  .footer-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .contact-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .footer-legal__inner {
    font-size: 12px;
    gap: 6px 10px;
  }

  .legal-sep {
    display: none;
  }
}

/* ---------- 16. 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;
    scroll-behavior: auto !important;
  }

  .js-ready [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .footer-link:hover {
    transform: none;
  }
}