/* ================================================================
   /assets/site.css · 全站共享样式
   万博MANBETCN官网 · 深空蓝 × 鎏金橙 海报式设计系统
   ================================================================ */

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.75;
  background: var(--light-gray);
  color: var(--near-black);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
input,
textarea,
select {
  font: inherit;
  border: none;
  background: none;
  color: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Design Tokens ---------- */
:root {
  --space-navy: #0B1B3A;
  --space-navy-light: #14336B;
  --gold: #F2A900;
  --near-black: #0A0A0A;
  --white: #FFFFFF;
  --light-gray: #F5F7FA;
  --mid-gray: #9CA3AF;
  --border-gray: #E5E7EB;
  --success-green: #10B981;
  --warning-red: #EF4444;

  --font-heading: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'SFMono-Regular', monospace;

  --content-max: 1240px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow-float: 0 12px 40px rgba(10, 10, 10, .14);
  --shadow-hover: 0 18px 44px rgba(242, 169, 0, .16);
  --transition-timing: cubic-bezier(.22, 1, .36, 1);
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--space-navy);
  overflow-wrap: break-word;
}

h1 {
  font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
}

h2 {
  font-size: clamp(1.75rem, 3vw + 1rem, 2.8rem);
}

h3 {
  font-size: clamp(1.1rem, 1vw + .8rem, 1.5rem);
}

h4 {
  font-size: 1rem;
}

h5,
h6 {
  font-size: .875rem;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}

.page-title {
  font-size: clamp(2rem, 4vw + 1rem, 3.8rem);
  line-height: 1.15;
  margin-bottom: 20px;
}

.page-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--mid-gray);
  max-width: 30em;
}

.data-number {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}

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

/* ---------- Layout System ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 44px);
}

.site-main {
  min-height: 70vh;
  padding-top: 110px;
  position: relative;
}

.section {
  padding-block: clamp(64px, 8vw, 120px);
}

.section-deep {
  background: var(--space-navy);
  color: var(--white);
}

.section-plain {
  background: var(--white);
}

.section-light {
  background: var(--light-gray);
}

.is-inverted {
  color: var(--white);
}

.is-inverted h1,
.is-inverted h2,
.is-inverted h3,
.is-inverted h4,
.is-inverted h5,
.is-inverted h6 {
  color: var(--white);
}

.is-inverted .link-underline {
  color: var(--white);
}

.is-grid-bg {
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 34px 34px;
}

/* ---------- Grid / Split ---------- */
.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));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.split-reverse {
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
}

.split-wide {
  grid-template-columns: minmax(0, 1.5fr) minmax(0, .5fr);
}

@media (min-width: 768px) and (max-width: 1023px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid-4,
  .split,
  .split-reverse,
  .split-wide {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 28px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.4;
  letter-spacing: .02em;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color .2s var(--transition-timing),
    border-color .2s var(--transition-timing),
    color .2s var(--transition-timing),
    transform .2s var(--transition-timing),
    box-shadow .2s var(--transition-timing);
  cursor: pointer;
}

.btn-primary {
  background: var(--gold);
  color: var(--near-black);
}

.btn-primary:hover {
  background: #FFB800;
  color: var(--near-black);
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(242, 169, 0, .22);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: transparent;
  border-color: currentColor;
  color: inherit;
}

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

.btn-dark {
  background: var(--space-navy);
  color: var(--white);
}

.btn-dark:hover {
  background: var(--space-navy-light);
  color: var(--gold);
  transform: translateY(-1px);
}

/* ---------- Links ---------- */
.link-underline {
  position: relative;
  display: inline-block;
  padding-bottom: 3px;
  font-weight: 600;
  color: var(--space-navy);
  text-decoration: none;
}

.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .3s var(--transition-timing);
}

.link-underline:hover::after,
.link-underline:focus-visible::after {
  transform: scaleX(1);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--mid-gray);
  padding-block: 16px;
}

.breadcrumb-item {
  color: var(--space-navy);
  text-decoration: none;
  transition: color .18s var(--transition-timing);
}

.breadcrumb-item:hover {
  color: var(--gold);
}

.breadcrumb-item[aria-current="page"] {
  color: var(--mid-gray);
  pointer-events: none;
}

.breadcrumb-separator {
  color: var(--mid-gray);
  opacity: .6;
}

/* ---------- Badge / Tag ---------- */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  background: var(--space-navy);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.5;
}

.badge-gold {
  background: var(--gold);
  color: var(--near-black);
}

.badge-green {
  background: var(--success-green);
  color: var(--white);
}

.badge-red {
  background: var(--warning-red);
  color: var(--white);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--light-gray);
  border: 1px solid var(--border-gray);
  color: var(--space-navy);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
}

.tag-gold {
  background: rgba(242, 169, 0, .14);
  border-color: rgba(242, 169, 0, .35);
  color: var(--space-navy);
}

/* ---------- Media Frame ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--space-navy);
  box-shadow: var(--shadow-float);
}

.media-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
  background:
    repeating-linear-gradient(
      135deg,
      rgba(255, 255, 255, .05) 0 1px,
      transparent 1px 14px
    ),
    linear-gradient(150deg, var(--space-navy-light), var(--space-navy));
}

.media-frame[data-frame="4:3"]::before {
  padding-top: 75%;
}

.media-frame[data-frame="1:1"]::before {
  padding-top: 100%;
}

.media-frame[data-frame="portrait"]::before {
  padding-top: 125%;
}

.media-frame img,
.media-frame video {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame .media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 32px 18px 14px;
  background: linear-gradient(transparent, rgba(11, 27, 58, .8));
  color: var(--white);
  font-size: 13px;
  line-height: 1.5;
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 38px;
  margin-top: 36px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--border-gray), var(--gold));
}

.timeline-item {
  position: relative;
  padding-bottom: 34px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 169, 0, .2);
}

/* ---------- Account Entry ---------- */
.account-entry {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: var(--gold);
  border-radius: var(--radius-pill);
  color: var(--near-black);
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
  text-decoration: none;
  transition:
    background-color .2s var(--transition-timing),
    transform .2s var(--transition-timing),
    box-shadow .2s var(--transition-timing);
}

.account-entry:hover {
  background: #FFB800;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.account-entry-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--space-navy);
  box-shadow: 0 0 0 3px rgba(11, 27, 58, .18);
  flex: none;
}

/* ---------- Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 3000;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--space-navy), var(--gold) 40%, var(--gold));
  pointer-events: none;
}

/* ---------- Skip Link ---------- */
.skip-link:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link:focus {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  padding: 10px 20px;
  background: var(--space-navy);
  color: var(--gold);
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-decoration: none;
  pointer-events: auto;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 14px 20px 0;
  pointer-events: none;
}

.nav-capsule {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  width: min(100%, 1120px);
  padding: 8px 8px 8px 14px;
  background: rgba(11, 27, 58, .78);
  backdrop-filter: blur(14px) saturate(1.25);
  -webkit-backdrop-filter: blur(14px) saturate(1.25);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 32px rgba(0, 0, 0, .18);
  transition:
    background-color .3s var(--transition-timing),
    box-shadow .3s var(--transition-timing);
}

body[data-nav-open] .nav-capsule {
  background: rgba(11, 27, 58, .94);
  box-shadow: 0 14px 50px rgba(0, 0, 0, .32);
}

/* ---------- Brand ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gold);
  color: var(--near-black);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 18px;
  line-height: 1;
  transform: rotate(-6deg);
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, .1);
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -.02em;
  color: var(--white);
  white-space: nowrap;
}

/* ---------- Navigation ---------- */
.site-nav {
  margin-right: 4px;
}

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

.nav-item {
  flex: none;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, .86);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .01em;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color .2s var(--transition-timing),
    color .2s var(--transition-timing);
}

.nav-link:hover,
.nav-link:focus-visible {
  background: var(--gold);
  color: var(--near-black);
}

.nav-link[aria-current="page"] {
  background: var(--gold);
  color: var(--near-black);
}

/* ---------- Nav Toggle ---------- */
.nav-toggle {
  display: none;
  flex: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  background: radial-gradient(circle at 30% 20%, rgba(242, 169, 0, .18), transparent 60%);
  transition:
    border-color .2s var(--transition-timing),
    background-color .2s var(--transition-timing);
}

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

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--white);
  transition:
    transform .3s var(--transition-timing),
    opacity .2s var(--transition-timing);
}

.nav-toggle-bar:nth-child(1) {
  transform-origin: center left;
}

.nav-toggle-bar:nth-child(3) {
  transform-origin: center left;
}

body[data-nav-open] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  width: 20px;
}

body[data-nav-open] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(.4);
}

body[data-nav-open] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  width: 20px;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding-block: 130px 60px;
  background: var(--space-navy);
  color: var(--white);
  overflow: hidden;
  isolation: isolate;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-family: var(--font-heading);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.08;
  font-size: clamp(2.6rem, 6vw + 1rem, 5.2rem);
  margin-bottom: 24px;
  color: var(--white);
}

.hero-lead {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .72);
  max-width: 34em;
}

.hero-decor {
  position: absolute;
  right: -8%;
  top: 18%;
  width: 44%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(242, 169, 0, .25), transparent 60%),
    linear-gradient(150deg, var(--space-navy-light), var(--space-navy));
  transform: rotate(12deg);
  pointer-events: none;
  z-index: 1;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  background: var(--space-navy);
  color: var(--white);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 80% 0%, rgba(20, 51, 107, .65), transparent 65%),
    repeating-linear-gradient(115deg, rgba(255, 255, 255, .025) 0 1px, transparent 1px 22px);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.footer-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1.3fr;
  gap: 48px;
  align-items: start;
  padding-block: 64px 32px;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -.02em;
  margin-bottom: 14px;
  color: var(--white);
}

.footer-brand-desc {
  color: rgba(255, 255, 255, .62);
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .92);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  position: relative;
  z-index: 1;
}

.footer-link {
  color: rgba(255, 255, 255, .72);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  transition: color .18s var(--transition-timing);
}

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

.footer-contact {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.footer-contact-line {
  color: rgba(255, 255, 255, .7);
  font-size: 14px;
  line-height: 1.6;
}

.footer-contact-note {
  color: rgba(255, 255, 255, .42);
  font-size: 12px;
  line-height: 1.6;
  margin: 10px 0 4px;
}

.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding-block: 20px;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .5);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

/* ---------- Responsive: Tablet & Mobile ---------- */
@media (max-width: 1023px) {
  .footer-layout {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .nav-link {
    padding: 8px 12px;
    font-size: 13px;
  }
}

@media (max-width: 767px) {
  .site-header {
    padding-inline: 12px;
  }

  .nav-capsule {
    flex-wrap: wrap;
    padding: 8px 10px;
    border-radius: 26px;
  }

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

  .site-nav {
    display: none;
    flex-basis: 100%;
    width: 100%;
    margin: 8px 0 2px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, .1);
  }

  .site-nav[data-open] {
    display: block;
    animation: nav-reveal .28s var(--transition-timing);
  }

  @keyframes nav-reveal {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius-md);
  }

  body[data-nav-open] {
    overflow: hidden;
  }

  .footer-layout {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 48px;
  }

  .footer-brand {
    grid-column: auto;
  }

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

  .site-main {
    padding-top: 84px;
  }

  .hero {
    padding-block: 110px 40px;
  }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}