/* 风月AI APP站 · 霜白产品页 + 墨蓝信任色 + 朱红行动色 · #f4f6f8 #0b1c2c #c45c3e */
:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #0b1c2c;
  --muted: #5a6b7a;
  --line: #d7dee6;
  --navy: #14324a;
  --navy-soft: #1e4663;
  --action: #c45c3e;
  --action-dark: #a84830;
  --mint: #2f7a6b;
  --shadow: 0 18px 50px rgba(11, 28, 44, 0.08);
  --radius: 10px;
  --font-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(196, 92, 62, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 40% at 0% 20%, rgba(47, 122, 107, 0.07), transparent 50%),
    var(--bg);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(1100px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px max(20px, calc((100vw - 1100px) / 2));
  background: rgba(244, 246, 248, 0.88);
  border-bottom: 1px solid rgba(215, 222, 230, 0.9);
  backdrop-filter: blur(12px);
  transition: box-shadow 0.25s ease;
}
.site-header.is-scrolled { box-shadow: 0 8px 30px rgba(11, 28, 44, 0.08); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; letter-spacing: 0.02em; }
.brand img { width: 34px; height: 34px; object-fit: contain; }
.site-nav { display: flex; gap: 18px; color: var(--muted); font-size: 0.92rem; }
.site-nav a:hover { color: var(--navy); }

.header-cta, .btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 999px;
  font-weight: 700; font-size: 0.92rem; line-height: 1;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.header-cta, .btn-primary {
  color: #fff; background: var(--action);
  box-shadow: 0 10px 24px rgba(196, 92, 62, 0.28);
  border: none;
}
.header-cta:hover, .btn-primary:hover {
  background: var(--action-dark); transform: translateY(-1px);
}
.btn-ghost {
  color: var(--navy); background: #fff;
  border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--navy-soft); }

.hero {
  padding: 72px 0 56px;
}
.hero-panel {
  display: grid; grid-template-columns: 1.25fr 0.9fr; gap: 28px; align-items: stretch;
}
.hero-copy-card, .hero-store-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 18px; box-shadow: var(--shadow);
}
.hero-copy-card { padding: 36px 32px; }
.hero-store-card { padding: 28px 24px; background: linear-gradient(165deg, #123047, #0b1c2c); color: #eef3f7; }
.kicker {
  margin: 0 0 10px; color: var(--action); font-size: 0.8rem;
  letter-spacing: 0.14em; font-weight: 700;
}
.brand-signal {
  margin: 0 0 12px; font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800; letter-spacing: 0.04em; color: var(--navy);
}
.hero h1 {
  margin: 0 0 14px; font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  font-weight: 650; line-height: 1.4; max-width: 18em;
}
.hero-lead { margin: 0 0 22px; color: var(--muted); max-width: 36em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.store-label { margin: 0 0 8px; color: rgba(238,243,247,0.65); font-size: 0.8rem; letter-spacing: 0.12em; }
.hero-store-card h2 { margin: 0 0 14px; font-size: 1.25rem; }
.store-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.store-list li {
  padding: 12px 14px; border-radius: 10px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
}
.store-list strong { display: block; margin-bottom: 4px; }
.store-list span { color: rgba(238,243,247,0.7); font-size: 0.88rem; }

.section { padding: 56px 0; }
.section-label { margin: 0 0 8px; color: var(--action); font-size: 0.78rem; letter-spacing: 0.14em; font-weight: 700; }
h2 { margin: 0 0 14px; font-size: clamp(1.35rem, 2.4vw, 1.8rem); font-weight: 750; color: var(--navy); }
.muted { color: var(--muted); }

.gap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 22px; }
.gap-grid article {
  padding: 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
}
.gap-grid h3 { margin: 0 0 8px; font-size: 1.02rem; color: var(--navy); }
.gap-grid p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.path-steps { margin: 22px 0 0; padding: 0; list-style: none; counter-reset: s; display: grid; gap: 12px; }
.path-steps li {
  position: relative; padding: 18px 18px 18px 68px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  counter-increment: s;
}
.path-steps li::before {
  content: counter(s, decimal-leading-zero);
  position: absolute; left: 16px; top: 18px;
  color: var(--action); font-weight: 800;
}
.path-steps strong { display: block; margin-bottom: 4px; }
.path-steps span { color: var(--muted); font-size: 0.92rem; }

.hub-grid, .article-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px;
}
.hub-grid a, .article-grid a {
  display: flex; flex-direction: column; gap: 8px;
  padding: 18px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); transition: border-color 0.2s, transform 0.2s;
}
.hub-grid a:hover, .article-grid a:hover {
  border-color: rgba(196, 92, 62, 0.45); transform: translateY(-2px);
}
.hub-grid span, .article-grid span { color: var(--action); font-size: 0.76rem; letter-spacing: 0.08em; font-weight: 700; }
.hub-grid strong, .article-grid strong { font-size: 0.96rem; line-height: 1.45; }
.hub-grid em, .article-grid em { color: var(--muted); font-style: normal; font-size: 0.82rem; margin-top: auto; }

.qa-list details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.qa-list summary { cursor: pointer; font-weight: 700; list-style: none; }
.qa-list summary::-webkit-details-marker { display: none; }
.qa-list p { margin: 8px 0 0; color: var(--muted); }

.final-cta {
  margin: 24px 0 64px; padding: 42px 28px; text-align: center;
  background: linear-gradient(135deg, #123047, #0b1c2c); color: #eef3f7;
  border-radius: 18px;
}
.final-cta p { color: rgba(238,243,247,0.72); margin: 0 auto 18px; max-width: 32em; }
.final-cta .btn-primary { background: #fff; color: var(--navy); box-shadow: none; }
.final-cta .btn-primary:hover { background: #f0f3f6; }

.site-footer {
  padding: 42px 0 28px; border-top: 1px solid var(--line); background: #eef1f4;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; margin-bottom: 22px; }
.site-footer p, .site-footer li a { color: var(--muted); font-size: 0.9rem; }
.site-footer h3 { margin: 0 0 10px; font-size: 0.86rem; color: var(--navy); }
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li { margin-bottom: 8px; }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 10px 18px; justify-content: space-between;
  padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.82rem;
}
.footer-bottom a { color: var(--action); }

.page-hero {
  padding: 56px 0 28px;
}
.page-hero h1 { margin: 0 0 12px; font-size: clamp(1.6rem, 3vw, 2.2rem); color: var(--navy); }
.page-hero .lead { margin: 0 0 18px; color: var(--muted); max-width: 40em; }

.checklist { margin: 14px 0 0; padding: 0; list-style: none; }
.checklist li {
  position: relative; padding: 10px 0 10px 26px; border-bottom: 1px solid var(--line); color: var(--muted);
}
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 1.05em; width: 10px; height: 10px;
  border: 2px solid var(--mint); border-radius: 50%;
}
.howto-steps { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.howto-steps li {
  padding: 16px 18px; background: var(--surface); border-left: 3px solid var(--action); border-radius: 0 var(--radius) var(--radius) 0;
}
.howto-steps strong { display: block; margin-bottom: 4px; }
.howto-steps p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.data-table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.9rem; }
.data-table th, .data-table td { padding: 11px 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.data-table th { background: #e8eef3; color: var(--navy); }
.data-table td { color: var(--muted); background: #fff; }

.article-page .article-hero { padding: 48px 0 24px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; color: var(--muted); font-size: 0.84rem; }
.breadcrumb a { color: var(--action); }
.article-meta { margin: 8px 0 0; color: var(--muted); font-size: 0.86rem; }
.article-layout {
  display: grid; grid-template-columns: 1fr 260px; gap: 28px; padding: 12px 0 56px; align-items: start;
}
.article-content .lead { font-size: 1.05rem; color: var(--ink); margin: 0 0 22px; }
.article-content h2 { margin: 28px 0 10px; font-size: 1.2rem; }
.article-content p { margin: 0 0 12px; color: var(--muted); }
.article-faq, .related { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line); }
.related-grid { display: grid; gap: 8px; }
.related-grid a {
  display: flex; flex-direction: column; gap: 4px; padding: 12px 14px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
}
.related-grid span { color: var(--action); font-size: 0.76rem; }
.article-side {
  position: sticky; top: 80px; padding: 18px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
}
.article-side h2 { font-size: 1rem; margin-bottom: 6px; }
.article-side p { margin: 0 0 12px; color: var(--muted); font-size: 0.88rem; }
.side-link { display: inline-block; margin-top: 10px; color: var(--action); font-size: 0.86rem; }
.inline-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

.comp-table-wrap { overflow-x: auto; }
.trust-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 22px;
}
.trust-strip div {
  padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 10px; text-align: center;
}
.trust-strip strong { display: block; color: var(--navy); font-size: 0.95rem; }
.trust-strip span { color: var(--muted); font-size: 0.8rem; }

@media (max-width: 900px) {
  .site-nav { display: none; }
  .hero-panel, .gap-grid, .hub-grid, .article-grid, .footer-grid, .article-layout, .trust-strip {
    grid-template-columns: 1fr;
  }
  .article-side { position: static; }
}
@media (max-width: 600px) {
  .hero-copy-card { padding: 26px 20px; }
}