/* ==========================================================================
   星空赛事 · 共享样式表 /assets/site.css
   reset · 变量 · 中文排版 · 页头页脚 · 通用组件
   ========================================================================== */

:root {
  --ink: #070B14;
  --ink-2: #0E1626;
  --ink-3: #1B2740;
  --gold: #F2B84B;
  --gold-deep: #E39B2E;
  --cyan: #4FD1C5;
  --orange: #FF7A45;
  --paper: #F5F7FA;
  --silver: #A8B3C7;
  --teal-deep: #123B36;
  --alert: #E45757;
  --line: #1B2740;
  --radius: 2px;
  --shadow: 0 18px 48px rgba(0, 0, 0, .45);
  --maxw: 1240px;
  --gutter: clamp(18px, 4vw, 52px);
  --font-head: "Helvetica Neue", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
  --font-serif: Georgia, "Songti SC", "Times New Roman", serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Roboto Mono", monospace;
}

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

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 520px at 84% -10%, rgba(27, 39, 64, .85), transparent 70%),
    radial-gradient(720px 440px at 4% 14%, rgba(18, 59, 54, .55), transparent 72%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.02vw, 17px);
  line-height: 1.75;
  letter-spacing: .008em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--cyan); text-decoration: none; transition: color .2s ease; }
a:hover { color: #7DE3D9; }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }

h1, h2, h3, h4 {
  margin: 0 0 .6em;
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: .01em;
}

h1 { font-size: clamp(32px, 4.4vw, 58px); }
h2 { font-size: clamp(26px, 3.2vw, 42px); }
h3 { font-size: clamp(19px, 1.9vw, 26px); }

::selection { background: rgba(242, 184, 75, .32); color: #FFFFFF; }

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

/* ---------- 基础构件 ---------- */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip-link {
  position: absolute;
  left: 14px;
  top: -70px;
  z-index: 140;
  padding: 11px 18px;
  background: var(--gold);
  color: #0A0F1C;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .04em;
  border-radius: var(--radius);
  transition: top .22s ease;
}
.skip-link:focus { top: 14px; color: #0A0F1C; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(27, 39, 64, .42);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  white-space: nowrap;
  transition: transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-1px); color: var(--paper); }

.btn-primary {
  background: linear-gradient(120deg, var(--gold), var(--gold-deep));
  border-color: transparent;
  color: #0A0F1C;
  box-shadow: 0 10px 26px rgba(242, 184, 75, .2);
}
.btn-primary:hover {
  background: linear-gradient(120deg, #FFCB66, var(--gold));
  color: #0A0F1C;
}

.btn-ghost {
  background: transparent;
  border-color: rgba(79, 209, 197, .42);
  color: var(--cyan);
}
.btn-ghost:hover { background: rgba(79, 209, 197, .12); color: var(--cyan); }

.guide-line {
  height: 1px;
  border: 0;
  margin: clamp(28px, 5vw, 64px) 0;
  background: linear-gradient(90deg, transparent, var(--line) 18%, rgba(242, 184, 75, .45) 50%, var(--line) 82%, transparent);
  transform: rotate(-1.1deg);
}

.stack { display: grid; gap: var(--stack-gap, 16px); }

/* ---------- 页头：双层命令栏 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(7, 11, 20, .97), rgba(7, 11, 20, .84));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.header-rail {
  background: linear-gradient(90deg, var(--ink-2), rgba(14, 22, 38, .72));
  border-bottom: 1px solid rgba(27, 39, 64, .85);
}

.rail-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 20px;
  min-height: 34px;
}

.rail-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(168, 179, 199, .82);
}
.rail-item:last-child { color: var(--gold); }

.rail-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(79, 209, 197, .14);
}
.rail-item:last-child .rail-dot {
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(242, 184, 75, .16);
}

.bar-inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.6vw, 36px);
  min-height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--paper);
}
.brand:hover { color: var(--paper); }

.brand-mark {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--gold), var(--orange));
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  box-shadow: 0 0 20px rgba(242, 184, 75, .45);
}

.brand-text { display: block; }

.brand-name {
  display: block;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .07em;
  line-height: 1.2;
}

.brand-tag {
  display: block;
  margin-top: 3px;
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--silver);
}

.nav { margin-left: auto; }

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

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--silver);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .03em;
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}
.nav-link:hover {
  color: var(--paper);
  background: rgba(27, 39, 64, .55);
  border-color: var(--line);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: rgba(168, 179, 199, .55);
}

.nav-link[aria-current="page"] {
  color: var(--gold);
  background: rgba(242, 184, 75, .08);
  border-color: rgba(242, 184, 75, .3);
}
.nav-link[aria-current="page"] .nav-index { color: var(--gold); }
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(242, 184, 75, 0));
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.header-cta { display: inline-flex; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(27, 39, 64, .5);
  transition: border-color .2s ease, background .2s ease;
}
.nav-toggle:hover { border-color: rgba(242, 184, 75, .45); }

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  position: absolute;
  left: 50%;
  width: 18px;
  height: 1.5px;
  background: var(--paper);
  border-radius: 2px;
  transition: transform .25s ease, background .25s ease, top .25s ease;
}
.nav-toggle-bars { top: 50%; transform: translate(-50%, -50%); }
.nav-toggle-bars::before { content: ""; top: -6px; transform: translateX(-50%); }
.nav-toggle-bars::after { content: ""; top: 6px; transform: translateX(-50%); }

.site-header[data-open="true"] .nav-toggle-bars { background: transparent; }
.site-header[data-open="true"] .nav-toggle-bars::before { top: 0; transform: translateX(-50%) rotate(45deg); background: var(--gold); }
.site-header[data-open="true"] .nav-toggle-bars::after { top: 0; transform: translateX(-50%) rotate(-45deg); background: var(--gold); }

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  z-index: 3;
  background: linear-gradient(90deg, var(--cyan), var(--gold), var(--orange));
}

/* ---------- 页脚：档案抽屉标签栏 ---------- */

.site-footer {
  position: relative;
  margin-top: clamp(60px, 10vw, 140px);
  background: linear-gradient(180deg, #070B14, #0A1120 58%, #0E1626);
  border-top: 1px solid var(--line);
  color: var(--silver);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 18%, rgba(245, 247, 250, .5), transparent),
    radial-gradient(1.6px 1.6px at 79% 9%, rgba(242, 184, 75, .55), transparent),
    radial-gradient(1.4px 1.4px at 44% 62%, rgba(79, 209, 197, .45), transparent),
    radial-gradient(1.4px 1.4px at 62% 34%, rgba(245, 247, 250, .3), transparent),
    radial-gradient(140px 140px at 86% 22%, rgba(242, 184, 75, .1), transparent),
    radial-gradient(240px 240px at 6% 92%, rgba(79, 209, 197, .09), transparent);
}

.footer-arc {
  position: absolute;
  top: -150px;
  right: -14%;
  width: min(760px, 84vw);
  height: 340px;
  border: 1px solid rgba(79, 209, 197, .22);
  border-radius: 50%;
  transform: rotate(-8deg);
  pointer-events: none;
}
.footer-arc::after {
  content: "";
  position: absolute;
  inset: 28px;
  border: 1px solid rgba(242, 184, 75, .14);
  border-radius: 50%;
}

.footer-inner {
  position: relative;
  z-index: 2;
  padding: clamp(44px, 7vw, 88px) 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(26px, 4vw, 60px);
}

.footer-brand-mark {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 800;
  letter-spacing: .05em;
  color: var(--paper);
}

.footer-brand-line {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.footer-note {
  margin: 0;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
}

.footer-heading {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-links { display: grid; gap: 11px; }

.footer-link {
  color: var(--silver);
  font-size: 14px;
  letter-spacing: .02em;
  transition: color .2s ease;
}
.footer-link:hover {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: rgba(242, 184, 75, .65);
  text-underline-offset: 4px;
}

.footer-meta {
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: 24px;
  border-top: 1px solid rgba(27, 39, 64, .95);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px 32px;
}

.meta-item {
  display: flex;
  gap: 10px;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
}

.meta-label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(168, 179, 199, .68);
  padding-top: 2px;
}

.footer-legal {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid rgba(27, 39, 64, .7);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(168, 179, 199, .74);
}

.legal-copy { margin: 0; }

.legal-links { display: flex; flex-wrap: wrap; gap: 18px; }

.legal-link { color: rgba(168, 179, 199, .86); }
.legal-link:hover { color: var(--gold); }

.legal-icp { margin: 0; color: rgba(168, 179, 199, .6); }

/* ---------- 通用版式组件 ---------- */

.section { padding: clamp(56px, 9vw, 132px) 0; }

.section-head {
  display: grid;
  gap: 14px;
  max-width: 74ch;
  margin-bottom: clamp(28px, 4vw, 54px);
}

.eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold);
}

.section-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .01em;
}

.lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 1.8;
  color: var(--silver);
}

.display-xl {
  font-family: var(--font-head);
  font-size: clamp(48px, 8vw, 112px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.01em;
  margin: 0;
}

.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}
.prose p { margin: 0 0 1.1em; }
.prose strong { color: var(--paper); }

.editorial {
  font-family: var(--font-serif);
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.9;
  color: rgba(245, 247, 250, .9);
}

/* 面包屑 */
.breadcrumb { padding: 20px 0 0; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(168, 179, 199, .75);
}
.breadcrumb-list li { display: flex; align-items: center; gap: 8px; }
.breadcrumb-list li + li::before { content: "/"; color: var(--line); }

.breadcrumb-link { color: var(--silver); }
.breadcrumb-link:hover { color: var(--cyan); }
.breadcrumb-current { color: var(--gold); }

/* 栅格 */
.grid { display: grid; gap: clamp(18px, 2.4vw, 34px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

/* 档案面板 */
.panel {
  position: relative;
  padding: clamp(20px, 2.4vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(27, 39, 64, .5), rgba(14, 22, 38, .86));
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.panel-body { color: var(--silver); font-size: 15px; line-height: 1.8; }

/* 数据字段 */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(14px, 2vw, 30px);
}

.stat { display: grid; gap: 6px; }

.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--gold);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(168, 179, 199, .8);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--silver);
  white-space: nowrap;
}
.tag--gold { color: var(--gold); border-color: rgba(242, 184, 75, .42); background: rgba(242, 184, 75, .08); }
.tag--cyan { color: var(--cyan); border-color: rgba(79, 209, 197, .42); background: rgba(79, 209, 197, .08); }
.tag--orange { color: var(--orange); border-color: rgba(255, 122, 69, .42); background: rgba(255, 122, 69, .08); }

.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(168, 179, 199, .82);
}

/* 图片容器基础规则 */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, #0E1626, #070B14 55%, rgba(18, 59, 54, .72));
  aspect-ratio: 16 / 10;
}
.img-frame > img { width: 100%; height: 100%; object-fit: cover; }
.img-frame::after {
  content: "";
  position: absolute;
  left: -24%;
  bottom: -60%;
  width: 78%;
  aspect-ratio: 1 / 1;
  border: 1px solid rgba(255, 122, 69, .34);
  border-radius: 50%;
  pointer-events: none;
}
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--tall { aspect-ratio: 3 / 4; }

.img-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(168, 179, 199, .8);
}

/* 滚动显现 */
html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s cubic-bezier(.22, .61, .36, 1), transform .7s cubic-bezier(.22, .61, .36, 1);
}
html.js-ready [data-reveal].is-visible { opacity: 1; transform: none; }

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(16px, 3vw, 38px);
  bottom: clamp(16px, 3vw, 38px);
  z-index: 90;
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(242, 184, 75, .42);
  border-radius: 50%;
  background: rgba(14, 22, 38, .92);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease, background .2s ease;
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: rgba(242, 184, 75, .16); }

/* ---------- 响应式 ---------- */

@media (max-width: 1100px) {
  .brand-tag { display: none; }
  .nav-link { padding: 10px 9px; font-size: 13px; }
}

@media (max-width: 980px) {
  .header-cta { display: none; }

  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    z-index: 20;
    background: linear-gradient(180deg, var(--ink-2), #0A1120);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height .32s ease, visibility .32s ease;
  }

  .site-header[data-open="true"] .nav {
    max-height: 78vh;
    overflow-y: auto;
    visibility: visible;
  }

  .nav-list { flex-direction: column; gap: 0; padding: 10px var(--gutter) 22px; }

  .nav-link {
    padding: 15px 8px;
    font-size: 15px;
    border-bottom: 1px solid rgba(27, 39, 64, .75);
    border-radius: 0;
  }
  .nav-link[aria-current="page"] { border-color: rgba(242, 184, 75, .3); border-radius: var(--radius); }
  .nav-link[aria-current="page"]::after { display: none; }

  .grid--2, .grid--3, .grid--asym, .grid--12 { grid-template-columns: minmax(0, 1fr); }
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-9, .span-12 { grid-column: 1 / -1; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-arc { top: -180px; right: -32%; }
}

@media (max-width: 640px) {
  .rail-item { font-size: 10px; letter-spacing: .12em; }
  .site-header { position: sticky; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
  .legal-links { gap: 14px; }
  .stat-row { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html { scroll-behavior: auto !important; }
  html.js-ready [data-reveal] { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
}