:root {
  --ink: #08252e;
  --teal: #0d4f5c;
  --teal-deep: #06343d;
  --gold: #c9a227;
  --gold-soft: #e6c86a;
  --sand: #f3efe4;
  --line: rgba(8, 37, 46, 0.12);
  --text: #1c2b30;
  --muted: #5b6b70;
  --radius: 18px;
  --shadow: 0 24px 60px rgba(6, 40, 48, 0.16);
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Outfit", "PingFang SC", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--sand);
  line-height: 1.65;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 2.5rem)); margin: 0 auto; }
.container-narrow { width: min(780px, calc(100% - 2.5rem)); margin: 0 auto; }

.page-bg {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(201, 162, 39, 0.22), transparent 60%),
    radial-gradient(800px 480px at 92% 6%, rgba(13, 79, 92, 0.18), transparent 55%),
    linear-gradient(180deg, #eef4f2 0%, #f3efe4 45%, #ebe4d4 100%);
}

.site-header {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(243, 239, 228, 0.86);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; gap: 1.25rem;
  min-height: 76px;
}
.brand { display: flex; align-items: center; gap: .75rem; }
.brand-logo {
  width: 46px; height: 52px; object-fit: contain; flex-shrink: 0;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  font-family: var(--font-display);
  font-size: 1.35rem; letter-spacing: .04em;
}
.brand-text small { color: var(--muted); font-size: .78rem; }
.nav { display: flex; gap: 1.15rem; margin-left: auto; align-items: center; }
.nav a {
  color: var(--muted); font-weight: 500; font-size: .95rem;
  padding: .35rem 0; border-bottom: 2px solid transparent;
}
.nav a:hover, .nav a.active { color: var(--ink); border-color: var(--gold); }
.header-cta { white-space: nowrap; }
.nav-toggle {
  display: none; margin-left: auto;
  width: 42px; height: 42px; border-radius: 12px;
  border: 1px solid var(--line); background: rgba(255,255,255,.7);
  cursor: pointer;
}
.nav-toggle span {
  display: block; width: 18px; height: 2px; margin: 4px auto;
  background: var(--ink); border-radius: 2px;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  border: 0; border-radius: 999px; padding: .85rem 1.35rem;
  font-weight: 600; cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--gold), #a88412);
  color: #1a1404; box-shadow: 0 12px 28px rgba(201, 162, 39, .32);
}
.btn-ghost {
  background: rgba(255,255,255,.55);
  border: 1px solid rgba(8,37,46,.14);
  color: var(--ink);
}
.btn-on-dark {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.28);
  color: #f7f3ea;
}
.btn-sm { padding: .55rem 1rem; font-size: .9rem; }

.hero {
  position: relative; overflow: hidden;
  min-height: min(92vh, 860px);
  display: flex; align-items: flex-end;
  color: #f7f3ea;
}
.hero-media {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 34, 42, 0.2) 0%, rgba(6, 34, 42, 0.7) 55%, rgba(6, 28, 34, 0.94) 100%),
    radial-gradient(circle at 72% 32%, rgba(201,162,39,.38), transparent 42%),
    linear-gradient(135deg, #0b4a57, #08252e 55%, #04171c);
  animation: heroGlow 10s ease-in-out infinite alternate;
}
.hero-media::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 18% 70%, rgba(230,200,106,.12), transparent 28%),
    radial-gradient(circle at 88% 78%, rgba(13,79,92,.35), transparent 30%);
}
.hero-media::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 42%;
  background: url("data:image/svg+xml,%3Csvg width='1200' height='240' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 140 Q 150 80 300 140 T 600 140 T 900 140 T 1200 140 V240 H0Z' fill='%2308252e' fill-opacity='.45'/%3E%3Cpath d='M0 170 Q 180 120 360 170 T 720 170 T 1080 170 T 1200 160 V240 H0Z' fill='%230d4f5c' fill-opacity='.35'/%3E%3C/svg%3E") bottom/cover no-repeat;
  opacity: .9;
}
.hero-content {
  position: relative; z-index: 1;
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto 4.8rem;
  animation: rise .95s ease both;
}
.hero-logo {
  width: 108px; height: 122px; object-fit: contain;
  margin: 0 0 .9rem; padding: 8px;
  background: rgba(255,255,255,.94);
  border-radius: 22px;
  box-shadow: 0 16px 40px rgba(0,0,0,.28);
}
.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.9rem, 8vw, 5.5rem);
  line-height: 1.02; letter-spacing: .06em; margin: 0 0 .85rem;
  text-shadow: 0 10px 40px rgba(0,0,0,.35);
}
.hero-title {
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 500; margin: 0 0 .7rem; max-width: 18em;
}
.hero-sub { color: rgba(247,243,234,.82); margin: 0 0 1.7rem; max-width: 30em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }

.page-hero {
  position: relative; overflow: hidden;
  padding: 4.2rem 0 3.2rem;
  color: #f7f3ea;
  background:
    radial-gradient(circle at 80% 20%, rgba(201,162,39,.28), transparent 40%),
    linear-gradient(135deg, #0b4a57, #08252e 60%, #04171c);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero-logo {
  width: 88px; height: 100px; object-fit: contain;
  background: #fff; border-radius: 18px; padding: 6px; margin-bottom: .8rem;
}
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 .6rem; letter-spacing: .04em;
  animation: rise .7s ease both;
}
.page-hero p {
  margin: 0; max-width: 34rem; color: rgba(247,243,234,.82);
  animation: rise .85s ease both;
}

.notice-strip {
  margin-top: -1.2rem; position: relative; z-index: 2;
}
.notice-strip .container { display: grid; gap: .7rem; }
.notice-link {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  background: rgba(8, 37, 46, 0.92);
  color: #f7f3ea;
  border: 1px solid rgba(230, 200, 106, 0.28);
  transition: transform .2s ease;
}
.notice-link:hover { transform: translateY(-2px); }
.notice-link strong {
  font-family: var(--font-display); font-size: 1.05rem; display: block;
}
.notice-link span { opacity: .8; font-size: .92rem; }
.notice-link em { font-style: normal; color: var(--gold-soft); white-space: nowrap; font-weight: 600; }

.section { padding: 4.8rem 0; }
.section-tight { padding-top: 3rem; }
.section-head { margin-bottom: 2rem; max-width: 38rem; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-kicker {
  display: inline-block; margin-bottom: .55rem;
  color: var(--teal); font-weight: 600; font-size: .86rem; letter-spacing: .08em;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3vw, 2.45rem);
  margin: 0 0 .55rem; letter-spacing: .04em;
}
.section-head p { margin: 0; color: var(--muted); }

.service-rail {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: rgba(8,37,46,.08);
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  border: 1px solid rgba(8,37,46,.08);
}
.service-item {
  background: rgba(255,255,255,.72);
  padding: 1.7rem 1.35rem;
  min-height: 210px;
}
.service-item .idx {
  font-family: var(--font-display);
  color: var(--gold); font-size: 1.1rem; letter-spacing: .08em; margin-bottom: .7rem;
}
.service-item h3 {
  font-family: var(--font-display);
  font-size: 1.28rem; margin: 0 0 .55rem;
}
.service-item p { margin: 0; color: var(--muted); font-size: .95rem; }

.ecosystem {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 2rem; align-items: stretch;
}
.eco-copy { display: flex; flex-direction: column; justify-content: center; }
.eco-steps { display: grid; gap: 1rem; }
.eco-step {
  display: grid; grid-template-columns: 48px 1fr; gap: 1rem; align-items: start;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}
.eco-step:last-child { border-bottom: 0; }
.eco-step .num {
  width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--teal), var(--ink));
  color: var(--gold-soft); font-weight: 700;
}
.eco-step h3 { margin: 0 0 .25rem; font-family: var(--font-display); font-size: 1.15rem; }
.eco-step p { margin: 0; color: var(--muted); }

.split {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 2rem; align-items: center;
}
.split-panel {
  padding: 2.2rem;
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(circle at 80% 10%, rgba(201,162,39,.25), transparent 40%),
    linear-gradient(160deg, rgba(13,79,92,.95), rgba(8,37,46,.98));
  color: #f7f3ea;
  min-height: 300px;
  box-shadow: var(--shadow);
  animation: rise .8s ease both;
}
.split-panel h2 { font-family: var(--font-display); margin: 0 0 .8rem; }
.split-panel p { margin: 0 0 .8rem; color: rgba(247,243,234,.86); }
.split-meta { margin-top: 1.4rem; opacity: .9; font-size: .95rem; }

.news-grid, .download-grid, .partner-grid, .coop-grid {
  display: grid; gap: 1.15rem;
}
.news-grid { grid-template-columns: repeat(3, 1fr); }
.news-card {
  display: flex; flex-direction: column; gap: .7rem;
  padding: 1.4rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.66);
  border: 1px solid var(--line);
  transition: transform .2s ease, border-color .2s ease;
}
.news-card:hover { transform: translateY(-3px); border-color: rgba(13,79,92,.28); }
.news-meta { color: var(--muted); font-size: .82rem; }
.news-card h3 {
  font-family: var(--font-display);
  font-size: 1.18rem; margin: 0; line-height: 1.35;
}
.news-card p { margin: 0; color: var(--muted); flex: 1; }
.news-more { color: var(--teal); font-weight: 600; font-size: .9rem; }

.download-grid { grid-template-columns: repeat(3, 1fr); }
.download-card {
  padding: 1.7rem 1.45rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.72);
  border: 1px solid var(--line);
  display: flex; flex-direction: column; gap: .7rem;
  min-height: 240px;
}
.download-card .platform {
  display: inline-flex; align-self: flex-start;
  padding: .2rem .65rem; border-radius: 999px;
  background: rgba(13,79,92,.1); color: var(--teal);
  font-size: .8rem; font-weight: 700; letter-spacing: .04em;
}
.download-card h3 { margin: 0; font-family: var(--font-display); font-size: 1.25rem; }
.download-card .ver { color: var(--muted); font-size: .92rem; }
.download-card .desc { color: var(--muted); flex: 1; margin: 0; }
.download-card .actions { margin-top: auto; }

.cta-band {
  margin: 0;
  padding: 3.8rem 0;
  background:
    radial-gradient(circle at 15% 40%, rgba(201,162,39,.22), transparent 35%),
    linear-gradient(120deg, #0b4a57, #08252e);
  color: #f7f3ea;
}
.cta-band .inner {
  display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; flex-wrap: wrap;
}
.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin: 0 0 .45rem;
}
.cta-band p { margin: 0; color: rgba(247,243,234,.8); max-width: 30rem; }
.cta-actions { display: flex; flex-wrap: wrap; gap: .7rem; }

.partner-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.partner-item {
  text-align: center;
  padding: 1.2rem .8rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.coop-grid { grid-template-columns: repeat(3, 1fr); margin-bottom: 2rem; }
.coop-item {
  padding: 1.35rem 1.2rem 1.35rem 0;
  border-top: 2px solid var(--gold);
}
.coop-item h3 { margin: 0 0 .4rem; font-family: var(--font-display); font-size: 1.15rem; }
.coop-item p { margin: 0; color: var(--muted); font-size: .95rem; }

.form {
  display: grid; gap: .9rem;
  padding: 1.7rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.78);
  border: 1px solid var(--line);
}
.form label { display: grid; gap: .35rem; font-weight: 500; }
.form input, .form select, .form textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 12px;
  padding: .85rem .95rem; font: inherit; background: #fff;
}
.form textarea { min-height: 140px; resize: vertical; }
.alert { padding: .85rem 1rem; border-radius: 12px; margin-bottom: 1rem; }
.alert-ok { background: #e7f6ec; color: #1d5c34; }
.alert-err { background: #fdeceb; color: #8a1f1a; }

.article {
  max-width: 760px; margin: 0 auto;
  padding: 2.1rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.78);
  border: 1px solid var(--line);
}
.article h1 { font-family: var(--font-display); line-height: 1.25; margin-top: 0; }
.article-body { font-size: 1.05rem; }
.article-body p { margin: 0 0 1rem; }

.news-filters {
  display: flex; flex-wrap: wrap; gap: .55rem; margin-bottom: 1.6rem;
}
.chip {
  display: inline-flex; align-items: center;
  padding: .45rem .95rem; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(255,255,255,.55);
  color: var(--muted); font-weight: 500; font-size: .9rem;
}
.chip.active, .chip:hover {
  background: var(--ink); color: #f7f3ea; border-color: var(--ink);
}

.tips {
  margin-top: 2rem;
  padding: 1.4rem 1.5rem;
  border-radius: var(--radius);
  background: rgba(13,79,92,.06);
  border: 1px solid rgba(13,79,92,.12);
}
.tips h3 { margin: 0 0 .55rem; font-family: var(--font-display); }
.tips ul { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.tips li { margin: .25rem 0; }

.values {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem;
  margin-top: 2.2rem;
}
.value-item h3 {
  margin: 0 0 .4rem; font-family: var(--font-display); font-size: 1.2rem;
  padding-top: .8rem; border-top: 2px solid var(--gold);
}
.value-item p { margin: 0; color: var(--muted); }

.site-footer {
  margin-top: 0;
  background: linear-gradient(180deg, rgba(8,37,46,.97), #04161b);
  color: rgba(247,243,234,.88);
  padding: 3.2rem 0 1.4rem;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 1.5rem;
  padding-bottom: 2rem; border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-logo {
  width: 72px; height: 82px; object-fit: contain;
  background: #fff; border-radius: 16px; padding: 4px; margin-bottom: .7rem;
}
.footer-brand {
  font-family: var(--font-display); font-size: 1.65rem; margin-bottom: .5rem;
}
.site-footer h4 { margin: 0 0 .75rem; color: var(--gold-soft); font-size: .95rem; }
.site-footer a, .site-footer p { display: block; color: rgba(247,243,234,.76); margin: 0 0 .4rem; }
.site-footer a:hover { color: #fff; }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  padding-top: 1rem; font-size: .88rem; color: rgba(247,243,234,.52);
}

/* 默认可见（勿再默认 opacity:0）：PHP 中断时 footer/site.js 不会加载，否则整页像「空白」 */
.reveal {
  opacity: 1;
  transform: none;
}
.reveal.is-in { opacity: 1; transform: none; }

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes heroGlow {
  from { filter: saturate(1); }
  to { filter: saturate(1.08); }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-block; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 76px;
    background: rgba(243,239,228,.97); border-bottom: 1px solid var(--line);
    padding: 1rem 1.25rem 1.2rem; flex-direction: column; align-items: stretch; gap: .35rem;
  }
  .nav.open { display: flex; }
  .nav a { padding: .7rem 0; border-bottom: 1px solid var(--line); }
  .header-cta { display: none; }
  .service-rail, .news-grid, .download-grid, .footer-grid, .split, .ecosystem, .coop-grid, .values {
    grid-template-columns: 1fr;
  }
  .hero { min-height: 78vh; }
  .notice-link { flex-direction: column; align-items: flex-start; }
}