/*
  RankLedger static template
  Replaceable tokens to review before launch:
  - https://example.com in sitemap/canonical/hreflang
  - Platform Alpha/Beta/Gamma/Delta sample data
  - # outbound URLs
  - Contact and disclosure copy
*/
:root {
  --bg: #f7f5ef;
  --surface: #ffffff;
  --surface-2: #f1efe8;
  --ink: #111315;
  --muted: #62666d;
  --line: rgba(17, 19, 21, 0.12);
  --line-strong: rgba(17, 19, 21, 0.2);
  --accent: #b88a44;
  --accent-2: #167466;
  --danger: #7d2d2d;
  --ok: #1f6f4a;
  --shadow: 0 22px 60px rgba(18, 18, 18, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(184, 138, 68, 0.14), transparent 32rem),
    radial-gradient(circle at top right, rgba(22, 116, 102, 0.11), transparent 30rem),
    var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent-2); }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: #fff;
  border-radius: 999px;
}
.skip-link:focus { top: 1rem; }

.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }
.narrow { width: min(100% - 2rem, 860px); margin-inline: auto; }

.compliance-bar {
  background: #111315;
  color: rgba(255,255,255,0.86);
  font-size: 0.86rem;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.compliance-bar .container {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  text-align: center;
}
.age-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 24px;
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: 999px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(247,245,239,0.82);
  border-bottom: 1px solid var(--line);
}
.navbar {
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  letter-spacing: -0.035em;
  font-size: 1.05rem;
}
.logo img { width: 34px; height: 34px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
  padding: 0;
  margin: 0;
}
.nav-links a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0.55rem 0.78rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.93rem;
}
.nav-links a[aria-current="page"],
.nav-links a:hover {
  background: rgba(17,19,21,0.06);
  color: var(--ink);
}
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.hero {
  padding: clamp(3rem, 8vw, 7rem) 0 2rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.34rem 0.68rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.64);
  color: var(--accent-2);
  font-weight: 700;
  font-size: 0.82rem;
}
h1, h2, h3, h4 {
  line-height: 1.12;
  letter-spacing: -0.045em;
  margin: 0;
}
h1 {
  margin-top: 1rem;
  font-size: clamp(2.45rem, 8vw, 5.55rem);
  max-width: 920px;
}
h2 { font-size: clamp(1.75rem, 4vw, 3rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.4rem); }
.lead {
  font-size: clamp(1.02rem, 2.2vw, 1.22rem);
  color: var(--muted);
  max-width: 760px;
  margin: 1.2rem 0 0;
}
.hero-actions, .button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-weight: 750;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn-primary:hover { color: #fff; background: #24272a; }
.btn-secondary { background: rgba(255,255,255,0.72); color: var(--ink); }
.btn-ghost { background: transparent; color: var(--muted); }

.hero-panel {
  position: relative;
  min-height: 440px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(160deg, rgba(255,255,255,0.84), rgba(255,255,255,0.45)), url('../images/hero-pattern.svg');
  background-size: cover;
  box-shadow: var(--shadow);
  overflow: hidden;
  padding: 1rem;
}
.hero-stat-grid {
  display: grid;
  gap: 0.85rem;
  margin-top: 4rem;
}
.stat-card, .mini-card {
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1rem;
  backdrop-filter: blur(12px);
}
.stat-card strong {
  display: block;
  font-size: 2rem;
  letter-spacing: -0.05em;
  line-height: 1;
}
.stat-card span, .mini-card span { color: var(--muted); font-size: 0.9rem; }
.mini-card {
  position: absolute;
  right: 1rem;
  top: 1rem;
  width: min(250px, calc(100% - 2rem));
}

.section { padding: clamp(2.5rem, 7vw, 5rem) 0; }
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.4rem;
}
.section-head p { max-width: 680px; color: var(--muted); margin: 0.75rem 0 0; }
.kicker {
  margin-bottom: 0.6rem;
  color: var(--accent-2);
  font-weight: 800;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}
.two-col { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.three-col { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  position: relative;
  background: rgba(255,255,255,0.78);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.1rem;
  box-shadow: 0 12px 40px rgba(17,19,21,0.045);
}
.card:hover { border-color: rgba(22,116,102,0.32); }
.card p { color: var(--muted); }
.rank-card {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.rank-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
}
.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: #111315;
  color: #fff;
  font-weight: 850;
}
.score {
  text-align: right;
  font-weight: 850;
  letter-spacing: -0.03em;
}
.score span { display: block; color: var(--muted); font-size: 0.72rem; font-weight: 650; letter-spacing: 0; }
.platform-logo {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  padding: 0.5rem;
}
.meta-list {
  display: grid;
  gap: 0.42rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.92rem;
}
.meta-list b { color: var(--ink); }
.pros-watch {
  display: grid;
  gap: 0.7rem;
  font-size: 0.92rem;
}
.pros-watch ul {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  background: rgba(22,116,102,0.1);
  color: #145f54;
  font-weight: 760;
  font-size: 0.76rem;
}
.badge.neutral { background: rgba(17,19,21,0.07); color: var(--muted); }
.badge.warn { background: rgba(184,138,68,0.16); color: #7a5720; }

.filter-bar {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin: 1rem 0 1.25rem;
}
.filter-btn {
  min-height: 42px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.56rem 0.85rem;
  cursor: pointer;
  font-weight: 760;
}
.filter-btn.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.78);
  box-shadow: 0 12px 40px rgba(17,19,21,0.04);
}
table { width: 100%; border-collapse: collapse; min-width: 850px; }
th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  background: rgba(17,19,21,0.04);
  color: var(--ink);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
tr:last-child td { border-bottom: 0; }
td { color: var(--muted); }
td strong { color: var(--ink); }

.notice {
  border: 1px solid rgba(125,45,45,0.18);
  background: rgba(125,45,45,0.06);
  border-radius: var(--radius-lg);
  padding: 1rem;
  color: #5d2b2b;
}
.notice strong { color: #4d2020; }
.callout {
  border: 1px solid rgba(22,116,102,0.18);
  background: rgba(22,116,102,0.075);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
}
.method-grid {
  display: grid;
  gap: 0.8rem;
}
.method-item {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 0.85rem;
  align-items: center;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,0.62);
}
.weight {
  font-weight: 880;
  color: var(--accent-2);
}
.progress {
  height: 10px;
  background: rgba(17,19,21,0.08);
  border-radius: 999px;
  overflow: hidden;
}
.progress span {
  display: block;
  height: 100%;
  width: var(--w);
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  border-radius: inherit;
}

.faq-list { display: grid; gap: 0.7rem; }
details {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
  border-radius: 18px;
  padding: 0.2rem 1rem;
}
summary {
  cursor: pointer;
  min-height: 54px;
  display: flex;
  align-items: center;
  font-weight: 800;
}
details p { color: var(--muted); margin-top: 0; }

.footer {
  margin-top: 2rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,0.36);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.9fr;
  gap: 1.5rem;
}
.footer p, .footer a, .small { color: var(--muted); font-size: 0.92rem; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.55rem; }
.footer h3 { font-size: 1rem; letter-spacing: 0; margin-bottom: 0.7rem; }
.legal-note {
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.84rem;
}

.language-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 0;
}
.language-card {
  width: min(100% - 2rem, 980px);
  border: 1px solid var(--line);
  border-radius: 34px;
  background: rgba(255,255,255,0.78);
  box-shadow: var(--shadow);
  padding: clamp(1.3rem, 5vw, 3rem);
}
.language-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.8rem;
}
.language-option {
  min-height: 170px;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(247,245,239,0.62);
  transition: transform 180ms ease, border-color 180ms ease;
}
.language-option:hover { transform: translateY(-2px); border-color: rgba(22,116,102,0.3); }
.language-option strong { display: block; font-size: 1.4rem; letter-spacing: -0.04em; }
.language-option span { color: var(--muted); }

[data-filter-item].is-hidden,
tr.is-hidden { display: none !important; }

@media (max-width: 980px) {
  .hero-grid, .card-grid, .two-col, .three-col, .footer-grid { grid-template-columns: 1fr; }
  .card-grid { gap: 0.85rem; }
  .nav-links {
    position: fixed;
    inset: 117px 1rem auto 1rem;
    display: none;
    padding: 0.8rem;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: rgba(255,255,255,0.96);
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { justify-content: center; }
  .menu-toggle { display: inline-flex; }
  .section-head { display: block; }
  .hero-panel { min-height: 320px; }
  .method-item { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .container, .narrow { width: min(100% - 1.1rem, var(--max)); }
  .compliance-bar .container { align-items: start; padding-block: 0.55rem; }
  h1 { font-size: clamp(2.15rem, 13vw, 3.45rem); }
  .hero { padding-top: 2.2rem; }
  .hero-actions .btn, .button-row .btn { width: 100%; }
  .rank-top { gap: 0.7rem; }
  .mini-card { position: static; width: auto; }
  .hero-stat-grid { margin-top: 1rem; }
  .language-options { grid-template-columns: 1fr; }
  .card { padding: 1rem; }
}