/* ==========================================================
   赛事直达 SITE.CSS — /assets/site.css
   全站共享：变量、重置、页头、页脚、通用按钮、网格、基础组件
   ========================================================== */

:root {
  /* 色彩体系 */
  --c-primary: #0A1E3C;
  --c-primary-deep: #061226;
  --c-primary-2: #10294B;
  --c-primary-3: #183A63;
  --c-primary-4: #234E82;
  --c-link: #3E77BC;
  --c-accent: #FF6B00;
  --c-accent-soft: #FF8C3B;
  --c-light: #F2F2F2;
  --c-white: #FFFFFF;
  --c-dark: #1A202C;
  --c-line: #DCE3EC;
  --c-muted: #64748B;

  /* 字体 */
  --font-heading: 'Noto Serif SC', 'Playfair Display', 'Songti SC', 'SimSun', Georgia, serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'SFMono-Regular', 'Cascadia Code', Consolas, 'Liberation Mono', monospace;

  /* 字号 */
  --size-display: 64px;
  --size-h1: 44px;
  --size-h2: 32px;
  --size-h3: 22px;
  --size-body: 16px;
  --size-small: 13px;

  /* 形状 */
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;

  /* 动效 */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 300ms;

  /* 布局 */
  --header-h: 72px;
  --rail-w: 44px;
  --container-w: 1280px;
  --page-bg: var(--c-light);
}

/* ---------- Reset & Base ---------- */

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

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

body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd,
figure,
blockquote,
pre {
  margin: 0;
}

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

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

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

button {
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

a {
  color: var(--c-link);
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

body {
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: 1.6;
  color: var(--c-dark);
  background: var(--c-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

@media (min-width: 1200px) {
  body {
    padding-left: var(--rail-w);
  }
}

/* ---------- 通用工具 ---------- */

.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;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 2.5rem);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translate(-50%, -200%);
  z-index: 2001;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--c-accent);
  color: var(--c-white);
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.skip-link:focus-visible {
  transform: translate(-50%, 0);
  opacity: 1;
}

.main-content {
  background: var(--page-bg, var(--c-light));
  color: var(--c-dark);
  min-height: 70vh;
}

.main-content:focus {
  outline: none;
}

:target {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 页头 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  max-width: 1560px;
  margin-inline: auto;
  height: var(--header-h);
  padding: 0 clamp(1rem, 3vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--c-white);
  flex-shrink: 0;
}

.brand:hover {
  color: var(--c-white);
}

.brand-mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--c-primary-4), var(--c-primary-2));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14), 0 6px 16px rgba(0, 0, 0, 0.25);
}

.brand-mark-dot {
  position: absolute;
  right: 5px;
  bottom: 5px;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--c-accent);
  box-shadow: 0 0 10px rgba(255, 107, 0, 0.8);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand-sub {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: rgba(255, 255, 255, 0.48);
}

/* ---------- 左侧坐标轨道 ---------- */

.coord-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 120;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  background: var(--c-primary-deep);
  border-right: 1px dashed rgba(255, 255, 255, 0.14);
  pointer-events: none;
  font-family: var(--font-data);
  color: rgba(255, 255, 255, 0.42);
}

.coord-rail-axis {
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1;
}

.coord-rail-label {
  writing-mode: vertical-rl;
  font-size: 10px;
  letter-spacing: 0.4em;
  color: rgba(255, 255, 255, 0.3);
}

/* ---------- 主导航 ---------- */

.header-nav-wrap {
  display: flex;
  align-items: center;
  gap: 28px;
}

.primary-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-item {
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.72);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.nav-link:hover {
  color: var(--c-white);
  background: rgba(255, 255, 255, 0.07);
}

.nav-link[aria-current="page"] {
  color: var(--c-white);
  background: linear-gradient(135deg, rgba(255, 107, 0, 0.22), rgba(255, 107, 0, 0.08));
  box-shadow: inset 0 0 0 1px rgba(255, 107, 0, 0.45);
}

.header-cta {
  flex-shrink: 0;
}

/* ---------- 移动导航按钮 ---------- */

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.nav-toggle-bar {
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  margin-left: -10px;
  border-radius: 2px;
  background: var(--c-white);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle-bar:nth-child(1) {
  top: 14px;
}

.nav-toggle-bar:nth-child(2) {
  top: 21px;
}

.nav-toggle-bar:nth-child(3) {
  top: 28px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

/* ---------- 页头滚动进度线 ---------- */

.header-scroll-line {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent-soft));
  box-shadow: 0 0 12px rgba(255, 107, 0, 0.6);
  z-index: 3;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease), color var(--dur) var(--ease);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--c-accent);
  color: var(--c-white);
  box-shadow: 0 6px 18px rgba(255, 107, 0, 0.3);
}

.btn-primary:hover {
  background: var(--c-accent-soft);
  color: var(--c-white);
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(255, 107, 0, 0.42);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: var(--c-white);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--c-white);
}

/* ---------- 字体与排版 ---------- */

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  color: inherit;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2rem, 5vw, var(--size-h1));
  font-weight: 700;
  letter-spacing: 0.01em;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, var(--size-h2));
  font-weight: 700;
}

h3 {
  font-size: var(--size-h3);
  font-weight: 600;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--c-accent);
  border-radius: 2px;
}

.page-title {
  margin-top: 12px;
  max-width: 12em;
}

.page-lead {
  margin-top: 16px;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
}

.prose {
  max-width: 720px;
}

.prose p {
  margin-bottom: 1.2em;
  line-height: 1.85;
}

.prose h2 {
  margin-top: 2.4em;
  margin-bottom: 0.6em;
}

.prose h3 {
  margin-top: 2em;
  margin-bottom: 0.5em;
}

.prose ul,
.prose ol {
  margin-bottom: 1.2em;
  padding-left: 1.4em;
}

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

.prose a {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.section {
  padding-block: clamp(2rem, 5vw, 4rem);
}

.section--tight {
  padding-block: 1.5rem;
}

.stack {
  display: grid;
  gap: 1.25rem;
}

.stack--lg {
  gap: 2rem;
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

/* ---------- 面包屑 / 坐标索引 ---------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 2rem;
  padding: 14px 18px;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--c-muted);
}

.breadcrumb-list a {
  color: var(--c-link);
}

.breadcrumb-sep {
  color: #CBD5E1;
}

.breadcrumb-coord {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: #94A7BC;
}

/* ---------- 主题筛选 ---------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 2rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--c-white);
  border: 1px solid var(--c-line);
  color: #38506B;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.2;
  transition: all var(--dur) var(--ease);
}

.chip:hover {
  border-color: #93B0CC;
  color: var(--c-primary-2);
  box-shadow: 0 3px 10px rgba(10, 30, 60, 0.08);
}

.chip[data-active],
.chip.is-active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-white);
  box-shadow: 0 6px 16px rgba(255, 107, 0, 0.32);
}

[data-filter-item][data-hidden] {
  display: none !important;
}

/* ---------- 卡片 ---------- */

.card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 10px 30px rgba(10, 30, 60, 0.06);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(10, 30, 60, 0.12);
  border-color: #C9D7E7;
}

/* ---------- 数据与标签 ---------- */

.data-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.data-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(10, 30, 60, 0.05);
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--c-primary-2);
}

.data-chip--accent {
  background: rgba(255, 107, 0, 0.12);
  color: #D15500;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--c-primary-2);
  color: var(--c-white);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.tag--soft {
  background: #E8EEF6;
  color: var(--c-primary-3);
}

/* ---------- 手风琴 ---------- */

.accordion {
  display: grid;
  gap: 12px;
}

.accordion-item {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.accordion-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
  color: var(--c-dark);
}

.accordion-item summary::-webkit-details-marker {
  display: none;
}

.accordion-item summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: rgba(10, 30, 60, 0.06);
  color: var(--c-primary-3);
  font-size: 18px;
  font-weight: 500;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.accordion-item[open] summary::after {
  transform: rotate(45deg);
  background: var(--c-accent);
  color: var(--c-white);
}

.accordion-panel {
  padding: 0 20px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: #52647A;
}

/* ---------- 图片容器 ---------- */

.image-frame {
  --frame-ratio: 16 / 9;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-primary-2), var(--c-primary));
  aspect-ratio: var(--frame-ratio);
  box-shadow: 0 14px 34px rgba(10, 30, 60, 0.18);
}

.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: linear-gradient(135deg, transparent 48%, #000 48%);
  mask-image: linear-gradient(135deg, transparent 48%, #000 48%);
}

.image-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 40%;
  background: linear-gradient(180deg, transparent, rgba(10, 30, 60, 0.55));
}

.image-frame img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.image-frame--portrait {
  --frame-ratio: 3 / 4;
}

.image-frame--square {
  --frame-ratio: 1 / 1;
}

.image-frame--light::before {
  background-image:
    linear-gradient(to right, rgba(10, 30, 60, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10, 30, 60, 0.05) 1px, transparent 1px);
}

/* ---------- 主题带与经纬线 ---------- */

.theme-band {
  position: relative;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  padding: clamp(2.5rem, 6vw, 5rem) 0;
}

.theme-band::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 120px;
  height: 3px;
  background: var(--c-accent);
  border-radius: 0 3px 3px 0;
}

.theme-band--dark {
  background: var(--c-primary);
  color: var(--c-white);
  border-color: transparent;
  border-radius: var(--radius-xl);
}

.theme-band--dark::before {
  width: 60px;
}

.theme-band--dark .section-title,
.theme-band--dark h2 {
  color: var(--c-white);
}

.theme-band--dark .page-lead,
.theme-band--dark .prose {
  color: rgba(255, 255, 255, 0.78);
}

.grid-lines {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(10, 30, 60, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10, 30, 60, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}

.grid-lines--dark {
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
}

/* ---------- 坐标标签 ---------- */

.coord-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: #9BB8DA;
}

.coord-tag--dark {
  background: rgba(10, 30, 60, 0.06);
  box-shadow: inset 0 0 0 1px rgba(10, 30, 60, 0.12);
  color: var(--c-primary-3);
}

/* ---------- 滚动显现 ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

[data-reveal][data-inview] {
  opacity: 1;
  transform: none;
}

/* ---------- 页脚 ---------- */

.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--c-primary) 0%, var(--c-primary-deep) 120%);
  color: rgba(255, 255, 255, 0.72);
  overflow: hidden;
}

.data-stream {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: repeating-linear-gradient(90deg, transparent 0 14px, rgba(255, 107, 0, 0.7) 14px 24px, transparent 24px 40px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent);
  animation: stream-move 9s linear infinite;
  pointer-events: none;
}

@keyframes stream-move {
  to {
    background-position: 40px 0;
  }
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(2rem, 4vw, 3.5rem);
}

.footer-brand-block {
  display: grid;
  gap: 16px;
  align-content: start;
}

.footer-note {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 34em;
}

.footer-col {
  display: grid;
  gap: 14px;
  align-content: start;
}

.footer-heading {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.footer-links a:hover {
  color: var(--c-accent-soft);
  padding-left: 4px;
}

.footer-contact {
  display: grid;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
}

.footer-contact li {
  display: grid;
  gap: 2px;
  list-style: none;
}

.footer-label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  padding-bottom: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding: 0;
  list-style: none;
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  transition: color var(--dur) var(--ease);
}

.footer-legal a:hover {
  color: var(--c-accent-soft);
}

/* ---------- 响应式 ---------- */

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

@media (max-width: 960px) {
  .nav-toggle {
    display: block;
  }

  .header-nav-wrap {
    position: fixed;
    top: var(--header-h);
    right: 0;
    left: 0;
    bottom: 0;
    z-index: 99;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 32px;
    padding: clamp(1.5rem, 6vw, 3rem) clamp(1.25rem, 6vw, 3rem) 3rem;
    background: var(--c-primary-deep);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .header-nav-wrap[data-open] {
    opacity: 1;
    transform: none;
    visibility: visible;
    pointer-events: auto;
  }

  .primary-nav {
    flex: 1;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .nav-link {
    display: block;
    font-size: 20px;
    font-weight: 600;
    padding: 14px 16px;
    border-radius: var(--radius-md);
  }

  .header-cta {
    width: 100%;
    padding: 14px 20px;
    font-size: 15px;
  }
}

@media (max-width: 880px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ---------- 减弱动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .data-stream {
    animation: none;
  }

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