/* ========================================
   银河欢迎港 / swift-yinhe.com.cn
   共享样式 /assets/site.css
   ======================================== */

:root {
  --color-space: #0B1B3A;
  --color-space-deep: #060E1F;
  --color-galaxy: #1D3A6E;
  --color-gold: #F5B942;
  --color-gold-soft: rgba(245, 185, 66, .35);
  --color-silver: #E6E9F0;
  --color-ink: #1A1A2E;
  --color-bg: #F4F6FA;
  --color-white: #FFFFFF;
  --color-warning: #E67E22;
  --color-success: #2ECC71;
  --gradient-space: linear-gradient(135deg, #0B1B3A 0%, #1D3A6E 100%);
  --gradient-gold: linear-gradient(135deg, #F5B942 0%, #E67E22 100%);
  --gradient-silver: linear-gradient(135deg, #FFFFFF 0%, #E6E9F0 100%);
  --font-heading: "Century Gothic", "Futura", "Noto Sans SC", sans-serif;
  --font-body: "Helvetica Neue", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 12px 32px rgba(11, 27, 58, .12);
  --shadow-gold: 0 0 24px rgba(245, 185, 66, .25);
  --transition: .3s ease;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  color: var(--color-space);
  line-height: 1.25;
}

p { margin: 0; }

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

a { color: var(--color-galaxy); text-decoration-thickness: 1px; text-underline-offset: .2em; }
a:hover { color: var(--color-gold); }

button { font-family: inherit; }

:focus-visible { outline: 3px solid var(--color-gold); outline-offset: 3px; }
:focus:not(:focus-visible) { outline: none; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  z-index: 200;
  background: var(--color-gold);
  color: var(--color-space);
  padding: .75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-decoration: none;
  transition: top .2s ease;
}

.skip-link:focus { top: 1rem; }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  z-index: 1000;
  background: linear-gradient(100deg, var(--color-gold), var(--color-warning));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .1s linear;
  pointer-events: none;
}

.site-header {
  position: relative;
  z-index: 100;
  overflow: hidden;
  background: var(--gradient-space);
  color: var(--color-silver);
  border-bottom: 1px solid rgba(245, 185, 66, .18);
}

.site-header::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -8%;
  width: 70%;
  height: 100%;
  background: radial-gradient(ellipse at 70% 30%, rgba(245, 185, 66, .14), transparent 62%);
  pointer-events: none;
}

.site-header::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -52px;
  width: 120%;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(ellipse at 50% 100%, rgba(255, 255, 255, .07), transparent 70%);
  pointer-events: none;
}

.header-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
}

.header-topline {
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  padding: .6rem 0;
  text-align: center;
}

.header-tagline {
  font-size: .82rem;
  letter-spacing: .18em;
  color: var(--color-gold);
  line-height: 1.4;
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0 .75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  color: var(--color-silver);
  text-decoration: none;
}

.brand:hover { color: var(--color-silver); }

.brand-orb {
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, var(--color-silver), var(--color-space) 68%);
  border: 1px solid rgba(245, 185, 66, .7);
  box-shadow: var(--shadow-gold), 0 0 0 6px rgba(245, 185, 66, .06);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-gold);
  transform: skewX(-6deg);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--color-white);
  transform: skewX(-6deg);
}

.brand-sub {
  font-size: .82rem;
  letter-spacing: .12em;
  color: var(--color-silver);
  opacity: .8;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .6rem;
  border: 1px solid rgba(245, 185, 66, .5);
  background: rgba(245, 185, 66, .1);
  color: var(--color-gold);
  padding: .55rem 1.1rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: .95rem;
  line-height: 1;
  transition: background .2s ease, transform .2s ease;
}

.nav-toggle:hover { background: rgba(245, 185, 66, .2); }
.nav-toggle:active { transform: scale(.96); }

.nav-toggle-label { font-weight: 600; letter-spacing: .1em; }

.nav-toggle-bar {
  position: relative;
  display: inline-block;
  width: 1.25rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: background .2s ease;
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .25s ease, top .25s ease;
}

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

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

.site-nav { transition: opacity .25s ease, transform .25s ease; }

.nav-list {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.2rem;
  padding: .8rem 0 .35rem;
}

.nav-item { margin: 0; }

.nav-link {
  display: block;
  padding: .45rem 0;
  color: var(--color-silver);
  text-decoration: none;
  font-size: .96rem;
  letter-spacing: .12em;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

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

.nav-link[aria-current="page"] {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
  font-weight: 700;
}

@media (max-width: 860px) {
  .js .nav-toggle { display: inline-flex; }

  .site-nav { width: 100%; }

  .nav-list {
    flex-wrap: wrap;
    justify-content: center;
    gap: .4rem 1.2rem;
    padding: .5rem 0 .75rem;
  }

  .js .site-nav { display: none; }
  .js .site-nav[data-open] { display: block; animation: navFade .25s ease; }

  .js .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .25rem 0 1rem;
  }

  .js .nav-link {
    padding: .85rem .25rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
  }

  .js .nav-link[aria-current="page"] {
    background: rgba(245, 185, 66, .08);
    border-bottom-color: var(--color-gold);
  }
}

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

.container,
.container-narrow {
  width: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container { max-width: var(--container-width); }
.container-narrow { max-width: 860px; }

.section { padding: 4rem 0; }
.section-tight { padding: 2rem 0; }
.section-alt { background: var(--gradient-silver); }

.section-title {
  display: inline-block;
  position: relative;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  transform: skewX(-5deg);
  padding-bottom: .3rem;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 3px;
  border-radius: 3px;
  background: var(--gradient-gold);
}

.section-lead {
  margin-top: 1rem;
  font-size: 1.125rem;
  color: #3a4468;
  max-width: 60ch;
}

.grid { display: grid; gap: 1.5rem; }
.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)); }

@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 3rem 0; }
}

.card {
  padding: 1.8rem;
  background: rgba(255, 255, 255, .88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(29, 58, 110, .12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 185, 66, .45);
  box-shadow: 0 18px 40px rgba(11, 27, 58, .16);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-space);
  margin-bottom: .6rem;
}

.card-body { color: #3a4468; }

.card-glow { border-color: rgba(245, 185, 66, .4); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 1.8rem;
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.btn:active { transform: scale(.96); }

.btn-primary {
  background: var(--gradient-gold);
  color: var(--color-space);
  box-shadow: 0 6px 20px rgba(245, 185, 66, .35);
}

.btn-primary:hover {
  color: var(--color-space);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(245, 185, 66, .45);
}

.btn-secondary {
  background: var(--color-galaxy);
  color: var(--color-silver);
  box-shadow: 0 6px 16px rgba(29, 58, 110, .3);
}

.btn-secondary:hover {
  color: var(--color-silver);
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1px solid var(--color-silver);
  background: transparent;
  color: var(--color-space);
}

.btn-ghost:hover {
  color: var(--color-space);
  border-color: var(--color-gold);
  transform: translateY(-2px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .25rem .75rem;
  padding: 1rem 0;
  font-size: .9rem;
}

.breadcrumb a { color: var(--color-galaxy); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-gold); }

.breadcrumb li + li::before {
  content: "/";
  display: inline-block;
  margin-right: .75rem;
  color: var(--color-galaxy);
  opacity: .5;
}

.image-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--gradient-space);
  aspect-ratio: 16 / 9;
  isolation: isolate;
}

.image-frame::before,
.image-frame::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.image-frame::before {
  top: 20%;
  left: 25%;
  width: 50%;
  height: 50%;
  border: 1px solid rgba(245, 185, 66, .4);
  box-shadow: 0 0 32px rgba(245, 185, 66, .18);
}

.image-frame::after {
  top: 8%;
  left: 8%;
  width: 84%;
  height: 84%;
  border: 1px dashed rgba(255, 255, 255, .2);
  animation: orbitSpin 30s linear infinite;
}

.image-frame img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame-label {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  font-family: var(--font-heading);
  letter-spacing: .12em;
  color: var(--color-gold);
  text-align: center;
}

.orbit-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--color-galaxy);
  font-size: .85rem;
  letter-spacing: .2em;
}

.orbit-divider::before,
.orbit-divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}

.timeline {
  position: relative;
  padding-left: 1.8rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: .35rem;
  top: .2rem;
  bottom: .2rem;
  width: 2px;
  background: linear-gradient(180deg, var(--color-gold), var(--color-galaxy));
}

.timeline-item {
  position: relative;
  padding-bottom: 1.6rem;
}

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

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.8rem;
  top: .25rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 0 4px rgba(245, 185, 66, .18);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s ease, transform .55s ease;
}

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

.site-footer {
  position: relative;
  margin-top: auto;
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-space-deep), var(--color-space));
  color: var(--color-silver);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 185, 66, .7), transparent);
}

.footer-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 1.5rem;
  position: relative;
}

.footer-orbit {
  position: absolute;
  right: -12%;
  bottom: -35%;
  width: 70%;
  height: 90%;
  border: 1px solid rgba(245, 185, 66, .12);
  border-radius: 50%;
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.6fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  min-width: 0;
}

.footer-col-brand { gap: 1rem; }

.footer-col-contact { gap: .4rem; }

.brand-footer {
  align-self: flex-start;
  margin-bottom: .25rem;
}

.footer-tagline {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-silver);
  opacity: .92;
  max-width: 32ch;
}

.footer-title {
  font-family: var(--font-heading);
  font-size: .9rem;
  letter-spacing: .16em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin: .5rem 0 .9rem;
}

.footer-list,
.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: .55rem;
}

.footer-list a {
  color: var(--color-silver);
  text-decoration: none;
  font-size: .95rem;
  transition: color .2s ease;
}

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

.footer-list a[aria-current="page"] {
  color: var(--color-gold);
  font-weight: 600;
}

.footer-contact-list li {
  font-size: .9rem;
  opacity: .92;
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: .85rem;
  color: var(--color-silver);
  opacity: .82;
}

.footer-copy { margin: 0; }
.footer-shared { margin: 0; letter-spacing: .04em; }

@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 50%;
  background: var(--color-gold);
  color: var(--color-space);
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 0 24px rgba(245, 185, 66, .4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s, background .25s ease;
  z-index: 500;
}

.back-to-top:hover { background: var(--color-silver); }

.back-to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

@keyframes orbitSpin {
  to { transform: rotate(360deg); }
}

@keyframes orbitShift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(12px, -8px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .js [data-reveal] { opacity: 1; transform: none; }
  .image-frame::after { animation: none; }
  .site-header::before,
  .site-header::after { display: none; }
}