/* ==========================================================================
   安博体育登录 · /assets/site.css
   共享外壳：轨道导航 + 仪表盘页脚 + 通用组件
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --ink-900: #062a24;
  --ink-800: #0b3a32;
  --ink-700: #0e4b44;
  --cyan-500: #3df2d0;
  --cyan-100: #9ff7e7;
  --amber-400: #f2b84b;
  --wine-700: #6e1f3b;
  --indigo-800: #2b2554;
  --paper: #eaf7f3;
  --mist: #8db8ae;

  --rail-w: 248px;
  --content-max: 1180px;
  --gutter: clamp(1.15rem, 4vw, 3.25rem);
  --bar-h: 4.5rem;

  --radius-lg: 28px;
  --radius-md: 16px;
  --radius-sm: 10px;

  --line: rgba(61, 242, 208, 0.18);
  --line-soft: rgba(141, 184, 174, 0.22);
  --shadow-panel: 0 24px 60px -32px rgba(0, 0, 0, 0.85);
  --ease: cubic-bezier(0.22, 0.68, 0.34, 1);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, "Noto Sans Mono", monospace;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-block-start: calc(var(--bar-h) + 0.75rem);
}

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

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

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

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

a { color: inherit; }

[hidden] { display: none !important; }

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.72;
  color: var(--paper);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(58rem 34rem at 92% -12%, rgba(14, 75, 68, 0.85), transparent 72%),
    radial-gradient(42rem 30rem at -8% 104%, rgba(43, 37, 84, 0.65), transparent 74%),
    linear-gradient(180deg, #041f1b 0%, var(--ink-900) 46%, #07211d 100%);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.08;
  text-wrap: balance;
}

h1 { font-size: clamp(2.35rem, 6vw, 4.4rem); }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.7rem); }
h3 { font-size: clamp(1.22rem, 2vw, 1.5rem); letter-spacing: -0.02em; }
h4 { font-size: 1.06rem; letter-spacing: -0.01em; }

p { max-width: 68ch; }

::selection {
  background: var(--cyan-500);
  color: #03211c;
}

:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 4. 工具类与通用组件 ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  inset-block-start: 0.6rem;
  inset-inline-start: 0.6rem;
  z-index: 200;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  background: var(--cyan-500);
  color: #03211c;
  font-weight: 800;
  font-size: 0.9rem;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.18s var(--ease);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.78rem 1.3rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background-color 0.18s var(--ease),
    color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.btn-primary {
  background: var(--cyan-500);
  color: #03211c;
  box-shadow: 0 14px 32px -18px rgba(61, 242, 208, 0.95);
}

.btn-primary:hover { background: var(--cyan-100); }

.btn-ghost {
  background: transparent;
  color: var(--cyan-100);
  border-color: var(--line);
}

.btn-ghost:hover {
  color: var(--cyan-500);
  border-color: rgba(61, 242, 208, 0.55);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: rgba(141, 184, 174, 0.5);
}

.breadcrumb-link {
  color: var(--cyan-100);
  text-decoration: none;
  border-bottom: 1px dashed rgba(61, 242, 208, 0.4);
}

.breadcrumb-link:hover { color: var(--cyan-500); }

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

.panel {
  padding: clamp(1.1rem, 2.6vw, 1.8rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(158deg, rgba(11, 58, 50, 0.92), rgba(6, 42, 36, 0.92));
  box-shadow: var(--shadow-panel);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber-400);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.62rem;
  border: 1px solid rgba(61, 242, 208, 0.35);
  border-radius: 999px;
  background: rgba(14, 75, 68, 0.5);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--cyan-100);
}

.data-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  align-items: start;
}

.media-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    linear-gradient(152deg, rgba(14, 75, 68, 0.95), rgba(6, 42, 36, 0.95));
}

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

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

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

/* ---------- 5. 轨道导航（header） ---------- */
.site-rail {
  position: sticky;
  inset-block-start: 0;
  z-index: 80;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(6, 42, 36, 0.98), rgba(6, 42, 36, 0.94));
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.rail-inner {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  padding: 0.7rem var(--gutter) 0.8rem;
}

.rail-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--paper);
  text-decoration: none;
  min-width: 0;
}

.brand-glyph {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(61, 242, 208, 0.38);
  border-radius: 12px;
  background: linear-gradient(150deg, rgba(61, 242, 208, 0.2), rgba(14, 75, 68, 0.55));
  color: var(--cyan-500);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.2;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.brand-tagline {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--amber-400);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 0 auto;
  padding: 0.52rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(14, 75, 68, 0.55);
  color: var(--cyan-100);
  font-size: 0.8rem;
  font-weight: 800;
  cursor: pointer;
}

.nav-toggle:hover { border-color: rgba(61, 242, 208, 0.5); }

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

.nav-toggle-bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.site-rail[data-open="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-rail[data-open="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.site-rail[data-open="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.site-nav {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s var(--ease);
}

.site-rail[data-open="true"] .site-nav { grid-template-rows: 1fr; }

.nav-body {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  min-height: 0;
  overflow: hidden;
}

.site-rail[data-open="true"] .nav-body {
  max-height: calc(100dvh - var(--bar-h) - 4rem);
  overflow-y: auto;
}

.nav-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--mist);
  order: -1;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-item { display: block; }

.nav-link {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  align-items: center;
  gap: 0.55rem;
  padding: 0.6rem 0.7rem;
  border: 1px solid transparent;
  border-radius: 12px;
  color: var(--cyan-100);
  font-size: 0.98rem;
  font-weight: 800;
  text-decoration: none;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.nav-text { display: block; line-height: 1.3; }

.nav-link:hover {
  background: rgba(14, 75, 68, 0.6);
  border-color: var(--line);
  color: var(--paper);
  transform: translateX(2px);
}

.nav-link:hover .nav-index { color: var(--amber-400); }

.nav-link[aria-current="page"] {
  background: linear-gradient(100deg, rgba(61, 242, 208, 0.18), rgba(14, 75, 68, 0.28));
  border-color: rgba(61, 242, 208, 0.5);
  color: var(--cyan-500);
  box-shadow: inset 3px 0 0 0 var(--amber-400);
}

.nav-link[aria-current="page"] .nav-index { color: var(--amber-400); }

.rail-foot {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding-block-start: 0.85rem;
  border-top: 1px dashed var(--line-soft);
}

.rail-cta { width: 100%; }

.rail-note {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  max-width: none;
}

.rail-progress {
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  height: 2px;
  background: rgba(61, 242, 208, 0.12);
}

.rail-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan-500), var(--amber-400));
}

.rail-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(4, 23, 20, 0.7);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

body.nav-open { overflow: hidden; }

/* ---------- 6. 页脚（footer） ---------- */
.site-footer {
  margin-block-start: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--line);
  color: var(--paper);
  background-image:
    radial-gradient(40rem 22rem at 92% 0%, rgba(61, 242, 208, 0.1), transparent 72%),
    linear-gradient(180deg, #082e28 0%, #0b3a32 42%, var(--indigo-800) 100%);
}

.footer-inner {
  display: grid;
  gap: clamp(1.6rem, 3.5vw, 2.6rem);
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(2.2rem, 5vw, 3.6rem) var(--gutter) clamp(1.2rem, 2.5vw, 1.8rem);
}

.footer-upper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.7rem;
  padding-block-end: clamp(1.4rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line-soft);
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber-400);
  max-width: none;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.08;
  max-width: none;
}

.footer-line {
  margin-block-start: 0.5rem;
  max-width: 34ch;
  font-size: 0.95rem;
  color: var(--cyan-100);
}

.footer-line-muted {
  margin-block-start: 0.35rem;
  max-width: 40ch;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-contact-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
  max-width: none;
}

.contact-row {
  display: grid;
  grid-template-columns: 5.2rem minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.65rem;
  border: 1px solid rgba(61, 242, 208, 0.12);
  border-radius: var(--radius-sm);
  background: rgba(6, 42, 36, 0.45);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.contact-value {
  font-size: 0.86rem;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.copy-btn {
  padding: 0.28rem 0.7rem;
  border: 1px solid rgba(242, 184, 75, 0.5);
  border-radius: 999px;
  background: rgba(242, 184, 75, 0.12);
  color: var(--amber-400);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.copy-btn:hover {
  background: var(--amber-400);
  color: #2a1c02;
}

.copy-status {
  min-height: 1.2em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--cyan-500);
  max-width: none;
}

.footer-note {
  font-size: 0.78rem;
  color: var(--mist);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.6rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber-400);
  max-width: none;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  width: fit-content;
  padding-block: 0.15rem;
  border-bottom: 1px solid transparent;
  color: var(--cyan-100);
  font-size: 0.92rem;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-link::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(61, 242, 208, 0.4);
  transition: background-color 0.18s var(--ease);
}

.footer-link:hover {
  color: var(--cyan-500);
  border-bottom-color: rgba(61, 242, 208, 0.5);
}

.footer-link:hover::before { background: var(--amber-400); }

.footer-lower {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.4rem;
  padding-block-start: 1rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.footer-meta { max-width: none; }

.footer-icp {
  color: var(--cyan-100);
  letter-spacing: 0.04em;
  max-width: none;
}

/* ---------- 7. 平板 ---------- */
@media (min-width: 700px) {
  .footer-upper { gap: 2rem; }
  .footer-cols { gap: 2rem; }
  .split { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 8. 桌面：侧边导览轨道 ---------- */
@media (min-width: 1024px) {
  :root { --bar-h: 0px; }

  html { scroll-padding-block-start: 1.5rem; }

  body { padding-inline-start: var(--rail-w); }

  .site-rail {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    width: var(--rail-w);
    display: flex;
    border-bottom: 0;
    border-inline-end: 1px solid var(--line);
    background: linear-gradient(192deg, #062a24 0%, #0b3a32 56%, #0e4b44 100%);
  }

  .rail-inner {
    flex: 1 1 auto;
    gap: 0.9rem;
    min-height: 0;
    padding: 1.55rem 1.1rem 1.1rem;
  }

  .rail-top { flex-direction: column; align-items: flex-start; gap: 0; }

  .brand-tagline { display: block; }

  .nav-toggle { display: none; }

  .site-nav {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    min-height: 0;
    grid-template-rows: none;
    transition: none;
  }

  .nav-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding-block: 0.2rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(61, 242, 208, 0.4) transparent;
  }

  .nav-body::-webkit-scrollbar { width: 6px; }
  .nav-body::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(61, 242, 208, 0.35);
  }

  .rail-foot { margin-block-start: auto; }

  .rail-scrim { display: none !important; }

  body.nav-open { overflow: visible; }

  .footer-upper {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
    gap: 2.8rem;
  }

  .footer-cols {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.4fr);
  }

  .contact-row { grid-template-columns: 4.6rem minmax(0, 1fr) auto; }
}

/* ---------- 9. 小屏补丁 ---------- */
@media (max-width: 520px) {
  .brand-sub { display: none; }

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

  .contact-label { grid-column: 1 / -1; }

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

/* ---------- 10. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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

  .rail-progress-bar { transition: none; }
}