:root {
  --bg: #F6F4EF;
  --bg-2: #EFEBE2;
  --paper: #FFFDF9;
  --ink: #2A3038;
  --muted: #6C7683;
  --line: #E0D9CC;
  --steel: #4A6579;
  --steel-deep: #33495A;
  --clay: #D9622B;
  --shadow: 0 16px 40px rgba(42, 48, 56, .09);
  --shell: 1140px;
  --header-height: 72px;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
ul, ol, dl, dd { margin: 0; }
.page-shell { width: min(calc(100% - 44px), var(--shell)); margin: 0 auto; }

/* header */
.site-header { position: sticky; top: 0; z-index: 60; border-bottom: 1px solid var(--line); background: rgba(246, 244, 239, .94); backdrop-filter: blur(12px); }
.nav-shell { display: flex; align-items: center; justify-content: space-between; width: min(calc(100% - 44px), var(--shell)); min-height: var(--header-height); margin: 0 auto; gap: 16px; }
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 17px; font-weight: 900; letter-spacing: .2px; }
.brand img { width: 40px; height: 40px; border-radius: 8px; object-fit: contain; background: #fff; border: 1px solid var(--line); }
.primary-nav ul { display: flex; align-items: center; gap: clamp(10px, 1.5vw, 22px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 8px 0; color: var(--muted); font-size: 13px; font-weight: 700; }
.primary-nav a:hover { color: var(--clay); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; gap: 7px; padding: 0 16px; border-radius: 6px; background: var(--clay); color: #fff; font-size: 12.5px; font-weight: 900; white-space: nowrap; transition: background .18s ease; }
.nav-download:hover { background: #B94E1E; }
.nav-download svg, .button svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 6px; background: #fff; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; height: 2px; margin: 5px auto; background: var(--ink); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* hero */
.hero { border-bottom: 1px solid var(--line); background:
  repeating-linear-gradient(90deg, rgba(224, 217, 204, .5) 0 1px, transparent 1px 96px);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); align-items: center; gap: clamp(26px, 4vw, 58px); padding: 66px 0 70px; }
.hero-kicker { display: inline-block; margin: 0 0 16px; padding: 4px 12px; border: 1px solid var(--line); border-left: 3px solid var(--clay); background: var(--paper); color: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: 1.3px; }
.hero-kicker b { margin-right: 6px; color: var(--clay); }
.hero h1 { font-size: clamp(42px, 6vw, 66px); font-weight: 900; letter-spacing: -1.4px; line-height: 1.05; }
.hero-subtitle { margin-top: 14px; color: var(--steel); font-size: clamp(18px, 2.2vw, 23px); font-weight: 800; }
.hero-lead { max-width: 30em; margin-top: 16px; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; gap: 12px; padding: 0 26px; border: 1px solid transparent; border-radius: 6px; font-size: 14px; font-weight: 900; transition: background .18s ease; }
.button-primary { background: var(--steel); color: #fff; }
.button-primary:hover { background: var(--steel-deep); }
.button-large { min-height: 56px; padding: 0 32px; font-size: 15px; }
.text-link { color: var(--muted); font-size: 13px; font-weight: 700; border-bottom: 1px solid var(--line); padding-bottom: 2px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 0; margin: 28px 0 0; list-style: none; color: var(--muted); font-size: 12px; }
.hero-tags b { color: var(--ink); }

.scale-card { padding: 24px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); box-shadow: var(--shadow); }
.scale-top { display: flex; align-items: flex-end; justify-content: space-between; padding-bottom: 14px; border-bottom: 2px solid var(--ink); }
.scale-top p { color: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: 1.6px; }
.scale-top b { font-family: var(--mono); font-size: 34px; font-weight: 800; letter-spacing: -1px; }
.scale-top small { margin-left: 4px; color: var(--muted); font-family: var(--sans); font-size: 11px; font-weight: 400; letter-spacing: 0; }
.scale-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; padding: 16px 0 14px; }
.scale-stats div { min-width: 0; padding: 8px 10px; border-left: 2px solid var(--bg-2); }
.scale-stats dt { color: var(--muted); font-size: 11px; }
.scale-stats dd { font-family: var(--mono); font-size: 19px; font-weight: 700; }
.scale-bar { display: flex; height: 10px; border-radius: 2px; overflow: hidden; background: var(--bg-2); }
.scale-bar i:nth-child(1) { background: var(--steel); }
.scale-bar i:nth-child(2) { background: var(--clay); }
.scale-bar i:nth-child(3) { background: #C8B48E; }
.scale-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; padding: 10px 0 0; list-style: none; color: var(--muted); font-size: 11px; }
.scale-legend span { display: inline-block; width: 8px; height: 8px; margin-right: 5px; border-radius: 1px; background: var(--steel); }
.scale-legend li:nth-child(2) span { background: var(--clay); }
.scale-legend li:nth-child(3) span { background: #C8B48E; }
.scale-foot { padding-top: 14px; margin-top: 12px; border-top: 1px dashed var(--line); color: var(--muted); font-family: var(--mono); font-size: 10.5px; }

/* features */
.features { padding: 74px 0 78px; background: var(--paper); }
.section-heading { max-width: 720px; margin-bottom: 34px; }
.section-heading .eyebrow { margin-bottom: 12px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--clay); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1.8px; }
.eyebrow::before { content: ""; width: 14px; height: 2px; background: var(--clay); }
.section-heading h2 { font-size: clamp(25px, 3.2vw, 34px); font-weight: 900; letter-spacing: -.4px; line-height: 1.3; }
.section-heading p { margin-top: 10px; color: var(--muted); font-size: 13.5px; }
.section-heading-split { display: flex; align-items: flex-end; justify-content: space-between; max-width: none; gap: 24px; }

.rules { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line); }
.rule { display: flex; gap: 18px; padding: 26px 24px 26px 0; border-bottom: 1px solid var(--line); }
.rule:nth-child(odd) { padding-right: 32px; border-right: 1px solid var(--line); }
.rule:nth-child(even) { padding-left: 32px; }
.rule-no { flex: none; color: var(--clay); font-family: var(--mono); font-size: 13px; font-weight: 700; letter-spacing: 1px; }
.rule h3 { font-size: 15px; font-weight: 900; }
.rule p { margin-top: 7px; color: var(--muted); font-size: 12.9px; }

/* shots */
.shots { padding: 74px 0 80px; background: var(--bg-2); border-block: 1px solid var(--line); }
.board { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
.board figure { min-width: 0; margin: 0; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); box-shadow: var(--shadow); }
.board figure:nth-child(even) { margin-top: 26px; }
.board img { width: 100%; height: auto; border-radius: 4px; }
.board figcaption { display: flex; align-items: baseline; gap: 10px; padding: 12px 4px 2px; font-size: 13px; font-weight: 900; }
.board figcaption b { color: var(--clay); font-family: var(--mono); font-size: 11px; }
.board figcaption small { color: var(--muted); font-size: 11.5px; font-weight: 400; }
.sample-note { margin-top: 18px; color: var(--muted); font-size: 11.5px; }

/* faq */
.faq { padding: 74px 0 78px; }
.faq-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; align-items: start; }
.faq-grid details { min-width: 0; padding: 0 20px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.faq-grid summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 0; cursor: pointer; list-style: none; }
.faq-grid summary::-webkit-details-marker { display: none; }
.faq-grid summary h3 { font-size: 14px; font-weight: 900; }
.faq-grid summary i { position: relative; flex: none; width: 18px; height: 18px; }
.faq-grid summary i::before, .faq-grid summary i::after { content: ""; position: absolute; top: 8px; left: 2px; width: 14px; height: 1.5px; background: var(--steel); transition: transform .18s ease; }
.faq-grid summary i::after { transform: rotate(90deg); }
.faq-grid details[open] summary i::after { transform: rotate(0deg); }
.faq-grid details p { padding: 13px 0 16px; border-top: 1px dashed var(--line); color: var(--muted); font-size: 13px; line-height: 1.85; }

/* reviews */
.reviews { padding: 74px 0 78px; border-block: 1px solid var(--line); background: var(--paper); }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.review-card { min-width: 0; padding: 20px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); }
.review-card > p { color: #3E4753; font-size: 13px; }
.review-meta { display: flex; flex-direction: column; gap: 3px; padding-top: 12px; margin-top: 12px; border-top: 1px dashed var(--line); }
.review-meta b { color: var(--steel); font-size: 12px; font-weight: 800; }
.review-meta time { color: var(--muted); font-family: var(--mono); font-size: 10.5px; }

/* steps */
.steps { padding: 74px 0 80px; }
.flow { position: relative; display: grid; gap: 0; padding: 0 0 0 28px; margin: 0; list-style: none; }
.flow::before { content: ""; position: absolute; top: 10px; bottom: 10px; left: 6px; width: 1px; background: var(--line); }
.flow li { position: relative; padding: 0 0 28px; }
.flow li:last-child { padding-bottom: 0; }
.flow li::before { content: ""; position: absolute; top: 9px; left: -28px; width: 11px; height: 11px; border: 2px solid var(--clay); border-radius: 50%; background: var(--bg); }
.flow b { display: inline-block; margin-bottom: 4px; color: var(--clay); font-family: var(--mono); font-size: 11px; letter-spacing: 1.2px; }
.flow h3 { display: inline-block; margin-left: 8px; font-size: 15px; font-weight: 900; }
.flow p { margin-top: 6px; color: var(--muted); font-size: 13px; }

/* download */
.download { padding: 64px 0 70px; background: var(--steel-deep); }
.download-panel { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 28px; }
.download-copy .eyebrow { color: #E9A47D; }
.download-copy .eyebrow::before { background: #E9A47D; }
.download-copy h2 { margin-top: 10px; color: #fff; font-size: clamp(24px, 3vw, 32px); font-weight: 900; }
.download-copy p { margin-top: 10px; color: #B9C7D3; font-size: 13px; }
.download-act { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.download .button-primary { background: var(--clay); }
.download .button-primary:hover { background: #B94E1E; }
.download-notes { display: flex; flex-wrap: wrap; gap: 8px 16px; padding: 0; margin: 0; list-style: none; color: #9FB0BE; font-family: var(--mono); font-size: 11px; }

/* footer */
.site-footer { padding: 46px 0 36px; background: #2A3038; color: #C9CED4; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.3fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.footer-brand strong { color: #fff; font-size: 16px; font-weight: 900; }
.footer-brand p { margin-top: 6px; color: #8B939C; font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 12.5px; }
.footer-nav a { color: #AEB5BD; }
.footer-nav a:hover { color: #fff; }
.footer-meta { color: #8B939C; font-size: 12px; text-align: right; }
.footer-meta a { display: inline-block; margin-top: 6px; font-size: 11.5px; }
.disclaimer { grid-column: 1 / -1; padding-top: 18px; margin-top: 4px; border-top: 1px solid #3B444E; color: #7C848D; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; padding: 46px 0 50px; }
  .scale-card { max-width: 520px; }
  .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-meta { text-align: left; }
}
@media (max-width: 860px) {
  .primary-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; padding: 8px 22px 16px; border-bottom: 1px solid var(--line); background: var(--bg); }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
  .menu-toggle { display: block; }
}
@media (max-width: 760px) {
  .faq-grid { grid-template-columns: 1fr; }
  .rules { grid-template-columns: 1fr; }
  .rule:nth-child(odd) { padding-right: 0; border-right: 0; }
  .rule:nth-child(even) { padding-left: 0; }
}
@media (max-width: 640px) {
  .page-shell, .nav-shell { width: calc(100% - 34px); }
  .brand { font-size: 15px; }
  .nav-download { padding: 0 12px; }
  .nav-download span { font-size: 12px; }
  .hero h1 { font-size: 40px; }
  .hero-subtitle { font-size: 17px; }
  .board { grid-template-columns: 1fr; }
  .board figure:nth-child(even) { margin-top: 0; }
  .review-grid { grid-template-columns: 1fr; }
  .scale-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .button, .button-large { width: 100%; }
  .text-link { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}