/* ============================================================
   /assets/site.css — 万博娱乐 共享站级样式
   01 Reset / 02 Tokens / 03 中文排版 / 04 可访问性
   05 容器与栅格 / 06 基础组件 / 07 图片容器
   08 头部 / 09 页脚 / 10 响应式 / 11 减动效
   ============================================================ */

/* ---------- 01 Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

a { color: inherit; }

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

table { border-collapse: collapse; }

/* ---------- 02 Tokens ---------- */
:root {
  --void: #050817;
  --indigo: #0B1035;
  --panel: #141B4D;
  --orange: #FF6A2B;
  --cyan: #3DE0FF;
  --gold: #F4C46A;
  --violet: #A78BFA;
  --mist: #E9ECF7;
  --stone: #8C93AC;
  --cream: #F3EFE6;
  --moss: #6F8F6A;
  --clay: #C46B4A;

  --ink-body: #CBD1E6;
  --line: rgba(233, 236, 247, 0.12);
  --line-strong: rgba(233, 236, 247, 0.28);
  --line-cyan: rgba(61, 224, 255, 0.32);
  --focus: #3DE0FF;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "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, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-20: clamp(1.125rem, 0.35vw + 1rem, 1.25rem);
  --fs-28: clamp(1.35rem, 0.9vw + 1.1rem, 1.75rem);
  --fs-40: clamp(1.75rem, 2.2vw + 1rem, 2.5rem);
  --fs-64: clamp(2.35rem, 4.6vw + 1rem, 4rem);
  --fs-96: clamp(2.9rem, 7.6vw + 0.5rem, 6rem);

  --gap: clamp(1rem, 2vw, 1.75rem);
  --gutter: clamp(1rem, 3vw, 2.5rem);
  --radius: 2px;
}

/* ---------- 03 中文排版 ---------- */
html { scroll-behavior: smooth; }

body {
  min-height: 100%;
  background-color: var(--indigo);
  background-image:
    radial-gradient(1100px 680px at 82% -8%, rgba(61, 224, 255, 0.09), transparent 62%),
    radial-gradient(900px 620px at -6% 4%, rgba(255, 106, 43, 0.10), transparent 58%);
  background-repeat: no-repeat;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: #fff;
}

h1 { font-size: var(--fs-64); }
h2 { font-size: var(--fs-40); }
h3 { font-size: var(--fs-28); }
h4 { font-size: var(--fs-20); }

p { color: var(--ink-body); }

strong { font-weight: 800; color: #fff; }

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--cyan);
}

#main-content { scroll-margin-top: 140px; }

/* ---------- 04 可访问性 ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: var(--radius);
}

.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  z-index: 200;
  transform: translateY(-240%);
  padding: 0.65rem 1.05rem;
  background: var(--cyan);
  color: #050817;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 800;
  text-decoration: none;
  border-radius: var(--radius);
  box-shadow: 0 10px 24px -16px rgba(5, 8, 23, 0.9);
  transition: transform 180ms ease;
}

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

/* ---------- 05 容器与栅格 ---------- */
.container {
  width: min(100% - 2 * var(--gutter), 1200px);
  margin-inline: auto;
}

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }

.grid {
  display: grid;
  gap: var(--gap);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }

.prose { max-width: 72ch; }
.prose p + p { margin-top: 1rem; }

/* ---------- 06 基础组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 1px;
  background: currentColor;
  flex: 0 0 auto;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  background: rgba(244, 196, 106, 0.07);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.78rem 1.35rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 200ms ease, background-color 200ms ease,
    border-color 200ms ease, color 200ms ease, box-shadow 200ms ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--orange);
  color: #080B1F;
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 16px 32px -22px rgba(255, 106, 43, 0.95);
}

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

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

.btn-ghost:hover {
  color: var(--cyan);
  border-color: var(--line-cyan);
  background: rgba(61, 224, 255, 0.08);
}

.breadcrumb {
  font-size: 0.8rem;
  color: var(--stone);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.breadcrumb li + li::before {
  content: "/";
  color: rgba(140, 147, 172, 0.55);
}

.breadcrumb a {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}

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

/* ---------- 07 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--indigo);
  background-image:
    radial-gradient(120% 92% at 12% 8%, rgba(61, 224, 255, 0.18), transparent 62%),
    radial-gradient(110% 100% at 88% 92%, rgba(255, 106, 43, 0.20), transparent 64%),
    linear-gradient(158deg, #141B4D 0%, #0B1035 58%, #070A24 100%);
  box-shadow: inset 0 1px 0 rgba(233, 236, 247, 0.08),
    0 24px 48px -40px rgba(5, 8, 23, 0.95);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(233, 236, 247, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233, 236, 247, 0.055) 1px, transparent 1px);
  background-size: 32px 32px;
}

.media-frame > img,
.media-frame > picture > 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; }

/* ---------- 08 头部 ---------- */
.site-header {
  position: relative;
  position: sticky;
  top: 0;
  z-index: 90;
  isolation: isolate;
  color: var(--mist);
  background-color: #080C26;
  background-image:
    linear-gradient(112deg, rgba(255, 106, 43, 0.16) 0 12%, rgba(255, 106, 43, 0) 12.2%),
    linear-gradient(112deg, rgba(61, 224, 255, 0.10) 0 4.6%, rgba(61, 224, 255, 0) 4.8%),
    linear-gradient(180deg, #0C1138 0%, #070A24 100%);
  border-bottom: 1px solid rgba(61, 224, 255, 0.20);
}

.header-inner {
  width: min(100% - 2 * var(--gutter), 1240px);
  margin-inline: auto;
}

.header-top {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.6rem);
  padding-block: 0.6rem 0.55rem;
  border-bottom: 1px solid rgba(233, 236, 247, 0.09);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 900;
  line-height: 1;
  color: #060A1E;
  background: linear-gradient(150deg, var(--orange) 0%, var(--gold) 55%, var(--cyan) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  transition: transform 220ms ease;
}

.brand:hover .brand-mark { transform: rotate(-4deg) scale(1.04); }

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
}

.brand-name {
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.6vw, 1.22rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: #fff;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.26em;
  line-height: 1;
  color: var(--stone);
}

.quick-actions {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  margin-left: auto;
  flex-wrap: wrap;
}

.quick-link {
  display: inline-block;
  padding: 0.42rem 0.7rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--stone);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: color 200ms ease, border-color 200ms ease, background-color 200ms ease;
}

.quick-link:hover,
.quick-link:focus-visible {
  color: var(--cyan);
  border-color: rgba(61, 224, 255, 0.42);
  background: rgba(61, 224, 255, 0.07);
}

.quick-cta {
  display: inline-block;
  padding: 0.5rem 0.95rem;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: #080B1F;
  text-decoration: none;
  background: var(--orange);
  border: 1px solid rgba(255, 106, 43, 0.9);
  border-radius: var(--radius);
  box-shadow: 0 8px 20px -16px rgba(255, 106, 43, 0.95);
  transition: background-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}

.quick-cta:hover,
.quick-cta:focus-visible {
  background: var(--gold);
  transform: translateY(-1px);
}

.header-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 3.1rem;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--mist);
  background: rgba(20, 27, 77, 0.6);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  transition: border-color 180ms ease, color 180ms ease, background-color 180ms ease;
}

.nav-toggle:hover {
  color: var(--cyan);
  border-color: var(--line-cyan);
}

.nav-toggle-bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 200ms ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

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

.site-nav { flex: 1 1 auto; }

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(0.3rem, 1.6vw, 1.2rem);
}

.nav-list a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.55rem 0.2rem;
  font-family: var(--font-display);
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--mist);
  text-decoration: none;
  transition: color 180ms ease;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.18rem;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 200ms ease;
}

.nav-list a:hover { color: #fff; }
.nav-list a:hover::after { transform: scaleX(1); }

.nav-index {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--cyan);
  opacity: 0.75;
  transition: color 180ms ease, opacity 180ms ease;
}

.nav-list a[aria-current="page"] { color: #fff; }
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }
.nav-list a[aria-current="page"] .nav-index {
  color: var(--orange);
  opacity: 1;
}

.header-stamp {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: rgba(140, 147, 172, 0.72);
  white-space: nowrap;
}

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(61, 224, 255, 0.10);
}

.scroll-meter > span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--orange) 0%, var(--gold) 46%, var(--cyan) 100%);
  will-change: transform;
}

/* ---------- 09 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: #050817;
  border-top: 1px solid rgba(61, 224, 255, 0.20);
  color: var(--mist);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--orange) 0 22%,
    var(--gold) 22% 34%,
    var(--cyan) 34% 52%,
    var(--violet) 52% 68%,
    var(--moss) 68% 80%,
    var(--clay) 80% 100%
  );
  opacity: 0.85;
}

.footer-inner {
  width: min(100% - 2 * var(--gutter), 1200px);
  margin-inline: auto;
  padding-block: clamp(2.25rem, 5vw, 3.5rem) 1.5rem;
}

.footer-lead {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  padding-bottom: clamp(1.5rem, 3vw, 2.25rem);
  border-bottom: 1px solid rgba(233, 236, 247, 0.10);
}

.footer-brand-link {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: #fff;
  text-decoration: none;
  transition: color 200ms ease;
}

.footer-brand-link:hover { color: var(--gold); }

.footer-brand-note {
  margin-top: 0.45rem;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--stone);
}

.footer-ticket {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 1.15rem 1.25rem;
  border: 1px solid rgba(255, 106, 43, 0.35);
  border-radius: var(--radius);
  background-image: linear-gradient(
    135deg,
    rgba(255, 106, 43, 0.13) 0%,
    rgba(61, 224, 255, 0.06) 100%
  );
  box-shadow: inset 0 1px 0 rgba(233, 236, 247, 0.08);
}

.footer-ticket-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  color: var(--orange);
}

.footer-ticket-text {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--ink-body);
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem 1rem;
  padding-block: clamp(1.75rem, 4vw, 2.5rem);
  border-bottom: 1px solid rgba(233, 236, 247, 0.10);
}

.footer-group-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(233, 236, 247, 0.10);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--stone);
}

.footer-group-title::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  background: var(--orange);
  transform: rotate(45deg);
}

.footer-list li + li { margin-top: 0.45rem; }

.footer-list a {
  font-size: 0.86rem;
  color: var(--ink-body);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.footer-list a:hover {
  color: var(--cyan);
  border-bottom-color: rgba(61, 224, 255, 0.5);
}

.footer-static {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--stone);
}

.footer-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem 2rem;
  padding-top: 1.4rem;
}

.footer-contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.4rem;
  font-size: 0.8rem;
}

.footer-contact li:first-child { margin-top: 0; }

.footer-meta-label {
  flex: 0 0 auto;
  min-width: 5.2rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.footer-meta-value {
  color: var(--ink-body);
  word-break: break-word;
}

.footer-legal {
  font-size: 0.75rem;
  line-height: 1.9;
  color: rgba(140, 147, 172, 0.88);
}

.footer-copy {
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(140, 147, 172, 0.9);
}

/* ---------- 10 响应式 ---------- */
@media (min-width: 760px) {
  .footer-lead { grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); align-items: end; }
  .footer-groups { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .footer-meta { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); align-items: start; }
}

@media (max-width: 900px) {
  .header-stamp { display: none; }

  .nav-toggle { display: inline-flex; flex: 0 0 auto; }

  .header-bar {
    position: relative;
    justify-content: flex-start;
    gap: 0.75rem;
    min-height: 3rem;
    padding-block: 0.35rem;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    max-height: 70vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0.5rem var(--gutter) 1.1rem;
    background: #070A24;
    border-top: 1px solid rgba(233, 236, 247, 0.12);
    border-bottom: 1px solid rgba(61, 224, 255, 0.24);
    box-shadow: 0 28px 48px -34px rgba(5, 8, 23, 0.98);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: opacity 200ms ease, transform 200ms ease, visibility 200ms;
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

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

  .nav-list li + li { border-top: 1px solid rgba(233, 236, 247, 0.08); }

  .nav-list a {
    display: flex;
    padding: 0.82rem 0.2rem;
    font-size: 1.05rem;
  }

  .nav-list a::after { display: none; }

  .nav-list a[aria-current="page"] { color: var(--orange); }
  .nav-list a[aria-current="page"] .nav-index { color: var(--orange); opacity: 1; }
}

@media (max-width: 640px) {
  .brand-mark { width: 36px; height: 36px; font-size: 0.92rem; }
  .brand-sub { display: none; }

  .header-top {
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    padding-block: 0.55rem 0.5rem;
  }

  .quick-actions { margin-left: auto; gap: 0.15rem; }
  .quick-link { padding: 0.34rem 0.42rem; font-size: 0.72rem; }
  .quick-cta { padding: 0.44rem 0.68rem; font-size: 0.74rem; }

  .footer-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.4rem 0.9rem; }

  .btn { padding: 0.72rem 1.1rem; font-size: 0.9rem; }

  h1 { font-size: var(--fs-40); }
  h2 { font-size: var(--fs-28); }
}

@media (min-width: 901px) and (max-width: 1080px) {
  .header-stamp { display: none; }
}

/* ---------- 11 减动效 ---------- */
@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;
  }

  .btn:hover,
  .quick-cta:hover,
  .brand:hover .brand-mark { transform: none; }
}