/* ============================================================
   中欧体育赛事 — 共享站点样式 /assets/site.css
   设计语言：深空蓝场地 · 竞技橙运动轨迹 · 薄荷绿数据点
   切角面板 / 等宽索引 / 左右分屏式信息节奏
   ============================================================ */

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

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

body {
  margin: 0;
  min-height: 100%;
  overflow-x: hidden;
  background: var(--space-blue);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

svg { display: block; max-width: 100%; }

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

ul, ol { margin: 0; padding: 0; }

a { color: inherit; }

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

hr { border: 0; border-top: 1px solid var(--line); margin: 2em 0; }

::selection {
  background: var(--orange);
  color: #07182B;
}

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 品牌色 */
  --space-blue: #07182B;
  --midnight: #0D2C4D;
  --mist: #EDF3F7;
  --orange: #FF6B1A;
  --orange-deep: #D94E0B;
  --mint: #34D6A5;
  --indigo: #3B3C8F;
  --wine: #7B1E3B;
  --silver: #C3D0DC;
  --amber: #F4B740;

  /* 语义色 */
  --ink: #07182B;
  --paper: #EDF3F7;
  --paper-dim: #DCE6EE;

  /* 字体栈 */
  --font-display: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", SFMono-Regular, ui-monospace, Menlo, Consolas, "Courier New", monospace;

  /* 尺度 */
  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 48px);
  --header-h: 78px;
  --cut: 12px;

  /* 线与阴影 */
  --line: rgba(195, 208, 220, .18);
  --line-strong: rgba(195, 208, 220, .36);
  --shadow-soft: 0 24px 60px -40px rgba(0, 0, 0, .95);
  --ease: cubic-bezier(.32, .72, 0, 1);
}

@media (max-width: 900px) {
  :root { --header-h: 64px; }
}

/* ---------- 3. 排版基础 ---------- */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .6em;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.01em;
  color: inherit;
}

h1 { font-size: clamp(38px, 6vw, 78px); font-weight: 900; }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: clamp(21px, 2.4vw, 27px); }
h4 { font-size: 19px; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

strong, b { font-weight: 700; }

small { font-size: 13px; }

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: .92em;
  letter-spacing: .02em;
}

/* ---------- 4. 焦点可见性 ---------- */
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 5. 跳至主要内容 ---------- */
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 12px 22px;
  background: var(--orange);
  color: #07182B;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .04em;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}

.skip-link:focus { transform: translateY(0); }

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

/* ---------- 6. 站点头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  color: var(--mist);
  background: linear-gradient(180deg, rgba(7, 24, 43, .88) 0%, rgba(7, 24, 43, .44) 60%, rgba(7, 24, 43, 0) 100%);
  border-bottom: 1px solid transparent;
  transition: background .32s var(--ease), border-color .32s var(--ease), box-shadow .32s var(--ease);
}

.site-header[data-scrolled="true"] {
  background: rgba(13, 44, 77, .97);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
  border-bottom-color: var(--line);
  box-shadow: 0 22px 44px -34px rgba(0, 0, 0, .95);
}

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  width: 100%;
  max-width: var(--shell);
  min-height: var(--header-h);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* 品牌签名 + 赛事信号灯 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
  color: inherit;
}

.brand-signal {
  display: inline-flex;
  align-items: flex-end;
  gap: 3px;
  height: 22px;
}

.brand-signal i {
  display: block;
  width: 3px;
  border-radius: 1px;
  animation: signal-pulse 2.6s var(--ease) infinite;
}

.brand-signal i:nth-child(1) { height: 9px; background: var(--mint); animation-delay: 0s; }
.brand-signal i:nth-child(2) { height: 15px; background: var(--orange); animation-delay: .22s; }
.brand-signal i:nth-child(3) { height: 21px; background: var(--silver); animation-delay: .44s; }

@keyframes signal-pulse {
  0%, 100% { opacity: .5; }
  50% { opacity: 1; }
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.14;
}

.brand-mark {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--orange);
  white-space: nowrap;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .08em;
  color: var(--mist);
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 14px;
  background: rgba(13, 44, 77, .72);
  border: 1px solid var(--line-strong);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.nav-toggle-label { line-height: 1; }

.nav-toggle-bar {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background .2s var(--ease);
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .24s var(--ease);
}

.nav-toggle-bar::before { top: -6px; }
.nav-toggle-bar::after { top: 6px; }

/* 主导航 */
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.6vw, 26px);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.1vw, 20px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item { display: block; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 4px 12px;
  font-size: clamp(13px, 1.05vw, 14.5px);
  font-weight: 600;
  letter-spacing: .03em;
  color: rgba(237, 243, 247, .78);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: var(--orange);
  transition: width .24s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: #FFFFFF; }
.nav-link:hover::after { width: 100%; }

.nav-link[aria-current="page"] { color: #FFFFFF; }
.nav-link[aria-current="page"]::after { width: 24px; }

/* 头部入口 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-left: clamp(8px, 1.6vw, 22px);
  border-left: 1px solid var(--line);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  background: var(--orange);
  color: #07182B;
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: .03em;
  text-decoration: none;
  white-space: nowrap;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background .2s var(--ease), color .2s var(--ease);
}

.nav-cta:hover { background: var(--orange-deep); color: #FFFFFF; }

.nav-ghost {
  display: inline-flex;
  align-items: center;
  padding: 9px 2px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .03em;
  color: rgba(237, 243, 247, .72);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.nav-ghost:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

/* 滚动进度轨迹 */
.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(195, 208, 220, .12);
  pointer-events: none;
}

.header-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--orange) 0%, var(--amber) 55%, var(--mint) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .12s linear;
}

@media (max-width: 1180px) {
  .nav-ghost { display: none; }
}

/* 移动端导航 */
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .site-header[data-open="true"] .nav-toggle {
    background: var(--orange);
    border-color: var(--orange);
    color: #07182B;
  }

  .site-header[data-open="true"] .nav-toggle-bar { background: transparent; }
  .site-header[data-open="true"] .nav-toggle-bar::before { transform: translateY(6px) rotate(45deg); }
  .site-header[data-open="true"] .nav-toggle-bar::after { transform: translateY(-6px) rotate(-45deg); }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: 10px var(--gutter) 28px;
    background: rgba(9, 32, 56, .99);
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 34px 60px -32px rgba(0, 0, 0, .96);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    overscroll-behavior: contain;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    display: block;
    padding: 15px 0;
    font-size: 16px;
    border-bottom: 1px solid rgba(195, 208, 220, .12);
  }

  .nav-link::after { bottom: 9px; }
  .nav-link[aria-current="page"]::after { width: 28px; }

  .nav-actions {
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
    padding: 20px 0 4px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .nav-cta,
  .nav-ghost {
    flex: 1 1 auto;
    justify-content: center;
    display: inline-flex;
  }

  .nav-ghost { padding: 11px 8px; font-size: 13.5px; }
}

@media (max-width: 420px) {
  .brand-name { font-size: 15.5px; }
  .brand-mark { font-size: 9.5px; letter-spacing: .18em; }
}

/* ---------- 7. 站点页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--space-blue);
  color: var(--mist);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange) 0 20%, var(--mint) 20% 30%, var(--indigo) 30% 46%, transparent 46%);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  right: -150px;
  top: -110px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 60, 143, .5) 0%, rgba(59, 60, 143, 0) 68%);
  pointer-events: none;
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.55fr .85fr .85fr 1.35fr;
  gap: clamp(28px, 4vw, 56px);
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(52px, 7vw, 88px) var(--gutter) clamp(36px, 5vw, 56px);
}

.footer-brand { display: block; }

.footer-mark {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--orange);
}

.footer-name {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 900;
  letter-spacing: .04em;
  line-height: 1.2;
  color: var(--mist);
}

.footer-summary {
  max-width: 42ch;
  margin: 0 0 24px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(237, 243, 247, .7);
}

.footer-column { display: block; }

.footer-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mint);
}

.footer-heading::after {
  content: "";
  flex: 1 1 auto;
  min-width: 16px;
  height: 1px;
  background: var(--line);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.footer-links a {
  display: inline-block;
  font-size: 14.5px;
  color: rgba(237, 243, 247, .74);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.footer-contact-list li { display: grid; gap: 3px; }

.footer-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(195, 208, 220, .55);
}

.footer-value {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.footer-note {
  max-width: 40ch;
  margin: 18px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(237, 243, 247, .5);
}

.footer-base {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 20px var(--gutter) 30px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(237, 243, 247, .58);
}

.footer-legal,
.footer-icp,
.footer-domain { margin: 0; }

.footer-icp { color: rgba(195, 208, 220, .7); }
.footer-domain { color: rgba(52, 214, 165, .7); letter-spacing: .1em; }

@media (max-width: 1100px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-base { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* ---------- 8. 通用按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: .82em 1.55em;
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .03em;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease);
}

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

.btn:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--mint), inset 0 0 0 4px rgba(7, 24, 43, .85);
}

.btn--primary {
  background: var(--orange);
  color: #07182B;
}

.btn--primary:hover { background: var(--orange-deep); color: #FFFFFF; }

.btn--outline {
  border-color: var(--line-strong);
  color: var(--mist);
}

.btn--outline:hover {
  border-color: var(--mint);
  color: var(--mint);
}

.btn--mint {
  background: var(--mint);
  color: #052A22;
}

.btn--mint:hover { background: #26B98C; color: #041F19; }

.btn--small {
  padding: .62em 1.15em;
  font-size: 13px;
}

/* ---------- 9. 版式容器与网格 ---------- */
.page-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-top { padding-top: calc(var(--header-h) + clamp(28px, 5vw, 64px)); }

.section { padding: clamp(48px, 7vw, 96px) 0; }

.section--paper {
  background: var(--paper);
  color: var(--ink);
}

.section--paper .eyebrow { color: var(--wine); }
.section--paper .tag { border-color: rgba(7, 24, 43, .2); }

.section--midnight {
  background: var(--midnight);
  color: var(--mist);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

/* ---------- 10. 索引类小件 ---------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .05em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mint);
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: currentColor;
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumbs {
  padding: calc(var(--header-h) + 26px) 0 0;
}

.section--paper .breadcrumbs,
.breadcrumbs--on-light { color: rgba(7, 24, 43, .66); }

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55em;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: rgba(237, 243, 247, .6);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: .55em;
}

.breadcrumbs li + li::before {
  content: "/";
  color: rgba(195, 208, 220, .4);
}

.breadcrumbs a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

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

/* ---------- 12. 标签与芯片 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: rgba(52, 214, 165, .14);
  color: var(--mint);
  border: 1px solid rgba(52, 214, 165, .42);
  white-space: nowrap;
}

.tag--orange {
  background: rgba(255, 107, 26, .16);
  color: var(--orange);
  border-color: rgba(255, 107, 26, .46);
}

.tag--wine {
  background: rgba(123, 30, 59, .38);
  color: #F0A3BB;
  border-color: rgba(123, 30, 59, .9);
}

.tag--amber {
  background: rgba(244, 183, 64, .16);
  color: var(--amber);
  border-color: rgba(244, 183, 64, .48);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: .45em;
  padding: 8px 15px;
  border: 1px solid var(--line-strong);
  background: rgba(13, 44, 77, .62);
  color: var(--mist);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .02em;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.chip:hover,
.chip:focus-visible {
  border-color: var(--mint);
  color: var(--mint);
}

.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--mint);
  border-color: var(--mint);
  color: #052A22;
}

/* ---------- 13. 面板与数据卡 ---------- */
.panel {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 32px);
  background: var(--midnight);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  color: var(--mist);
  box-shadow: var(--shadow-soft);
}

.panel::after {
  content: "";
  position: absolute;
  right: -46px;
  bottom: -46px;
  width: 132px;
  height: 132px;
  border: 1px solid rgba(195, 208, 220, .16);
  transform: rotate(45deg);
  pointer-events: none;
}

.panel--paper {
  background: #FFFFFF;
  color: var(--ink);
  border-color: rgba(7, 24, 43, .14);
  border-left-color: var(--mint);
}

.panel--paper::after { border-color: rgba(7, 24, 43, .12); }

.panel--wine {
  background: linear-gradient(160deg, var(--wine) 0%, #4A1226 100%);
  border-color: rgba(242, 167, 190, .3);
  border-left-color: var(--amber);
}

.data-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 22px 24px;
  background: linear-gradient(160deg, rgba(13, 44, 77, .95) 0%, rgba(7, 24, 43, .98) 100%);
  border: 1px solid var(--line);
  border-top: 2px solid var(--mint);
  color: var(--mist);
  text-decoration: none;
  transition: transform .26s var(--ease), border-color .26s var(--ease), box-shadow .26s var(--ease);
}

.data-card:hover,
.data-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  border-top-color: var(--orange);
  box-shadow: var(--shadow-soft);
}

.data-card__index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--mint);
}

.data-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.32;
  color: var(--mist);
}

.data-card__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(237, 243, 247, .58);
}

/* ---------- 14. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(59, 60, 143, .55) 0%, rgba(7, 24, 43, .92) 55%, rgba(13, 44, 77, .94) 100%);
  border: 1px solid var(--line);
}

.media-frame::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: 18%;
  width: 120%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 26, .85), transparent);
  transform: rotate(-9deg);
  pointer-events: none;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 15. 长文正文 ---------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.85;
}

.prose > * + * { margin-top: 1em; }

.prose h2 {
  margin-top: 2em;
  font-size: clamp(24px, 3vw, 32px);
}

.prose h3 {
  margin-top: 1.7em;
  font-size: 20px;
}

.prose ul,
.prose ol { padding-left: 1.35em; }

.prose li { margin: .4em 0; }

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

.prose a:hover { color: var(--orange-deep); }

.prose blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--mint);
  font-size: 16.5px;
  color: rgba(237, 243, 247, .82);
}

/* ---------- 16. 进入动效 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}

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

/* ---------- 17. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

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

  .data-card:hover,
  .data-card:focus-visible,
  .btn:active { transform: none; }
}