/* ===== Terracotta Library / 陶土书阁 Theme ===== */
/* Warm ivory + terracotta + forest green + antique gold */

:root {
  --bg-cream: #faf6f1;
  --bg-ivory: #fffbf7;
  --bg-warm: #f5ede4;
  --bg-dark: #1e1812;
  --bg-forest: #1b4d3e;
  --bg-clay: #c65d3b;

  --text-dark: #2c1810;
  --text-light: #faf6f1;
  --text-muted: #7a6658;
  --text-soft: #a18f7e;

  --clay: #c65d3b;
  --clay-hover: #a84a2d;
  --clay-soft: #fde8e0;
  --forest: #1b4d3e;
  --forest-hover: #143d31;
  --forest-soft: #d4e9e2;
  --gold: #c9a227;
  --gold-hover: #a8841c;
  --gold-soft: #f9f0d7;

  --shadow: 0 4px 24px rgba(44,24,16,0.08);
  --shadow-lg: 0 12px 40px rgba(44,24,16,0.12);
  --radius: 14px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text-dark);
  background: var(--bg-cream);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--clay); text-decoration: none; }
a:hover { text-decoration: underline; }

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 600; cursor: pointer; border: none;
  transition: all .25s ease; line-height: 1.4;
}
.btn:disabled { opacity: .7; cursor: not-allowed; }
.btn-clay { background: var(--clay); color: #fff; }
.btn-clay:hover { background: var(--clay-hover); transform: translateY(-1px); }
.btn-forest { background: var(--forest); color: #fff; }
.btn-forest:hover { background: var(--forest-hover); transform: translateY(-1px); }
.btn-gold { background: var(--gold); color: #2c1810; }
.btn-gold:hover { background: var(--gold-hover); color: #2c1810; transform: translateY(-1px); }
.btn-outline { background: transparent; border: 2px solid var(--clay); color: var(--clay); }
.btn-outline:hover { background: var(--clay); color: #fff; }
.btn-outline-w { background: transparent; border: 2px solid rgba(255,255,255,.35); color: #fff; }
.btn-outline-w:hover { background: rgba(255,255,255,.1); }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: var(--clay); }
.btn-white { background: #fff; color: var(--clay); }
.btn-white:hover { background: var(--bg-cream); }
.btn-lg { padding: 16px 40px; font-size: 17px; border-radius: var(--radius); }
.btn-sm { padding: 8px 18px; font-size: 13px; }

/* ===== Navigation ===== */
.arch-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,246,241,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(44,24,16,.06);
}
.arch-nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 64px;
}
.arch-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--text-dark); }
.arch-brand-mark {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--clay), var(--gold));
  display: flex; align-items: center; justify-content: center; color: #fff; font-size: 14px;
}
.arch-menu { display: flex; align-items: center; gap: 6px; }
.arch-link {
  padding: 8px 18px; border-radius: 20px; font-size: 14px; font-weight: 500;
  color: var(--text-muted); transition: all .2s ease;
}
.arch-link:hover { color: var(--clay); background: var(--clay-soft); text-decoration: none; }
.arch-link.active { background: var(--clay); color: #fff; }
.arch-dl { margin-left: 12px; }
.nav-toggle {
  display: none; width: 36px; height: 36px; border-radius: 8px;
  background: transparent; border: 1px solid rgba(44,24,16,.1);
  align-items: center; justify-content: center; cursor: pointer; flex-direction: column; gap: 4px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--text-dark); border-radius: 1px; }
.nav-mobile {
  display: none; position: absolute; top: 64px; left: 0; right: 0;
  background: rgba(250,246,241,.98); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(44,24,16,.08); padding: 16px 24px;
  flex-direction: column; gap: 4px;
}
.nav-mobile.show { display: flex; }
.nav-mobile .arch-link { display: block; padding: 10px 14px; border-radius: 8px; }

/* ===== Sections ===== */
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.sec { padding: 72px 0; }
.sec-cream { background: var(--bg-cream); }
.sec-ivory { background: var(--bg-ivory); }
.sec-dark { background: var(--bg-dark); color: var(--text-light); }
.sec-forest { background: var(--forest); color: var(--text-light); }
.sec-warm { background: var(--bg-warm); }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.sec-chip {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px;
  border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 16px;
}
.sec-chip-clay { background: var(--clay-soft); color: var(--clay); }
.sec-chip-forest { background: var(--forest-soft); color: var(--forest); }
.sec-chip-gold { background: var(--gold-soft); color: var(--gold-hover); }
.sec-chip-white { background: rgba(255,255,255,.1); color: #fff; }
.sec-chip-dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; opacity: .7; }
.sec-title { font-size: 32px; font-weight: 800; line-height: 1.25; margin-bottom: 14px; color: var(--text-dark); }
.sec-title-light { color: var(--text-light); }
.sec-sub { font-size: 17px; color: var(--text-muted); line-height: 1.7; }
.sec-sub-light { color: rgba(250,246,241,.75); }

/* ===== Hero ===== */
.hero { padding: 64px 0 80px; background: linear-gradient(160deg, var(--bg-cream) 0%, var(--bg-warm) 50%, #f0e6d8 100%); position: relative; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; top: -120px; right: -120px; width: 420px; height: 420px;
  border-radius: 50%; background: radial-gradient(circle, rgba(198,93,59,.12) 0%, transparent 70%); pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: -80px; left: -80px; width: 320px; height: 320px;
  border-radius: 50%; background: radial-gradient(circle, rgba(27,77,62,.10) 0%, transparent 70%); pointer-events: none;
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; position: relative; z-index: 2; }
.hero-text { max-width: 560px; }
.hero-chip {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px;
  border-radius: 20px; background: var(--clay-soft); color: var(--clay);
  font-size: 13px; font-weight: 600; margin-bottom: 20px;
}
.hero-chip-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--clay); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }
.hero-title { font-size: 46px; font-weight: 800; line-height: 1.15; margin-bottom: 18px; color: var(--text-dark); }
.hero-title .hl { color: var(--clay); }
.hero-desc { font-size: 17px; color: var(--text-muted); line-height: 1.8; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-trust { display: flex; gap: 20px; flex-wrap: wrap; }
.hero-trust-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-soft); }
.hero-trust-item svg { width: 18px; height: 18px; color: var(--forest); }

/* Hero Visual — Document Card Stack */
.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; }
.hv-card {
  background: var(--bg-ivory); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 24px; width: 100%; max-width: 460px; position: relative;
  border: 1px solid rgba(44,24,16,.06);
}
.hv-bar { display: flex; align-items: center; gap: 6px; margin-bottom: 18px; }
.hv-dot { width: 10px; height: 10px; border-radius: 50%; }
.hv-dot.r { background: #e08e79; } .hv-dot.y { background: #d4b06a; } .hv-dot.g { background: #6aaa8e; }
.hv-title { font-size: 13px; color: var(--text-soft); font-weight: 500; }
.hv-mods { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 18px; }
.hv-mod {
  background: var(--bg-cream); border-radius: var(--radius-sm); padding: 14px;
  border: 1px solid rgba(44,24,16,.05); display: flex; align-items: center; gap: 10px;
}
.hv-mod-icon { width: 36px; height: 36px; border-radius: 8px; display: flex; align-items: center; justify-content: center; }
.hv-mod-icon.w { background: var(--clay-soft); color: var(--clay); }
.hv-mod-icon.s { background: var(--forest-soft); color: var(--forest); }
.hv-mod-icon.p { background: var(--gold-soft); color: var(--gold-hover); }
.hv-mod-icon.d { background: #e8e0f5; color: #7c6fae; }
.hv-mod-name { font-size: 13px; font-weight: 700; color: var(--text-dark); }
.hv-mod-desc { font-size: 11px; color: var(--text-soft); }
.hv-stats { display: flex; gap: 24px; padding-top: 16px; border-top: 1px solid rgba(44,24,16,.06); }
.hv-stat-num { font-size: 20px; font-weight: 800; color: var(--clay); }
.hv-stat-lbl { font-size: 12px; color: var(--text-soft); }

/* ===== Feature Cards ===== */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feat-card {
  background: var(--bg-ivory); border-radius: var(--radius); padding: 28px;
  border: 1px solid rgba(44,24,16,.06); transition: all .3s ease;
  position: relative; overflow: hidden;
}
.feat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--bar-color, var(--clay)); opacity: 0; transition: opacity .3s ease;
}
.feat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feat-card:hover::before { opacity: 1; }
.fc-clay { --bar-color: var(--clay); }
.fc-forest { --bar-color: var(--forest); }
.fc-gold { --bar-color: var(--gold); }
.fc-rose { --bar-color: #c45c6a; }
.fc-sky { --bar-color: #5a8fb8; }
.fc-stone { --bar-color: #8c7b6b; }
.feat-icon {
  width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.fi-clay { background: var(--clay-soft); color: var(--clay); }
.fi-forest { background: var(--forest-soft); color: var(--forest); }
.fi-gold { background: var(--gold-soft); color: var(--gold-hover); }
.fi-rose { background: #f5e0e4; color: #c45c6a; }
.fi-sky { background: #e0ecf5; color: #5a8fb8; }
.fi-stone { background: #ede8e3; color: #8c7b6b; }
.feat-name { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
.feat-desc { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== Platform Cards ===== */
.plat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.plat-card {
  background: var(--bg-ivory); border-radius: var(--radius); padding: 28px 22px;
  border: 1px solid rgba(44,24,16,.06); text-align: center; transition: all .25s ease;
}
.plat-card.featured { border-color: var(--clay); box-shadow: 0 0 0 1px var(--clay), var(--shadow); }
.plat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.plat-badge {
  display: inline-block; padding: 4px 10px; border-radius: 10px; font-size: 11px; font-weight: 700;
  margin-bottom: 14px;
}
.pb-clay { background: var(--clay-soft); color: var(--clay); }
.pb-forest { background: var(--forest-soft); color: var(--forest); }
.pb-gold { background: var(--gold-soft); color: var(--gold-hover); }
.plat-icon { width: 48px; height: 48px; margin: 0 auto 14px; border-radius: 12px; display: flex; align-items: center; justify-content: center; }
.pi-clay { background: var(--clay-soft); color: var(--clay); }
.pi-forest { background: var(--forest-soft); color: var(--forest); }
.pi-gold { background: var(--gold-soft); color: var(--gold-hover); }
.pi-rose { background: #f5e0e4; color: #c45c6a; }
.plat-name { font-size: 17px; font-weight: 700; margin-bottom: 4px; color: var(--text-dark); }
.plat-ver { font-size: 12px; color: var(--text-soft); margin-bottom: 6px; }
.plat-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; line-height: 1.6; }
.plat-btn { width: 100%; }

/* ===== Deep Dive Rows ===== */
.deep-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.deep-row.flip { direction: rtl; }
.deep-row.flip > * { direction: ltr; }
.deep-info { max-width: 520px; }
.deep-chip {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px;
  border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 16px;
}
.dc-clay { background: var(--clay-soft); color: var(--clay); }
.dc-forest { background: var(--forest-soft); color: var(--forest); }
.dc-gold { background: var(--gold-soft); color: var(--gold-hover); }
.deep-title { font-size: 28px; font-weight: 800; line-height: 1.25; margin-bottom: 16px; color: var(--text-dark); }
.deep-desc { font-size: 16px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.deep-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.deep-list li { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; color: var(--text-muted); }
.deep-list li svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 2px; }
.dld-clay { color: var(--clay); }
.dld-forest { color: var(--forest); }
.dld-gold { color: var(--gold-hover); }

/* Deep Visuals */
.deep-visual { background: var(--bg-ivory); border-radius: var(--radius); padding: 28px; border: 1px solid rgba(44,24,16,.06); }
.dv-title { font-size: 13px; font-weight: 600; color: var(--text-soft); margin-bottom: 18px; }
.dv-bar-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.dv-bar-label { width: 70px; font-size: 12px; color: var(--text-soft); flex-shrink: 0; }
.dv-bar-track { flex: 1; height: 8px; border-radius: 4px; background: var(--bg-warm); overflow: hidden; }
.dv-bar-fill { height: 100%; border-radius: 4px; }
.dvbf-clay { background: var(--clay); }
.dvbf-forest { background: var(--forest); }
.dvbf-gold { background: var(--gold); }
.dvbf-rose { background: #c45c6a; }
.dv-stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; padding-top: 18px; border-top: 1px solid rgba(44,24,16,.06); }
.dv-stat { text-align: center; }
.dv-stat-num { font-size: 22px; font-weight: 800; }
.dvn-clay { color: var(--clay); }
.dvn-forest { color: var(--forest); }
.dvn-gold { color: var(--gold-hover); }
.dv-stat-lbl { font-size: 12px; color: var(--text-soft); margin-top: 4px; }

/* ===== Stats Strip ===== */
.stats-strip { background: var(--bg-dark); color: var(--text-light); padding: 48px 0; }
.stats-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; text-align: center; }
.stat-item { padding: 0 12px; }
.stat-num { font-size: 32px; font-weight: 800; margin-bottom: 6px; }
.sn-clay { color: var(--clay); }
.sn-gold { color: var(--gold); }
.sn-forest { color: #6aaa8e; }
.stat-lbl { font-size: 13px; color: rgba(250,246,241,.65); }

/* ===== Reviews ===== */
.rev-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.rev-card {
  background: var(--bg-ivory); border-radius: var(--radius); padding: 26px;
  border: 1px solid rgba(44,24,16,.06); transition: all .25s ease;
}
.rev-card:hover { box-shadow: var(--shadow); }
.rev-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.rev-avatar {
  width: 44px; height: 44px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; color: #fff;
}
.av-clay { background: linear-gradient(135deg, var(--clay), #a84a2d); }
.av-forest { background: linear-gradient(135deg, var(--forest), #2d6b56); }
.av-gold { background: linear-gradient(135deg, var(--gold), #a8841c); }
.av-rose { background: linear-gradient(135deg, #c45c6a, #a04050); }
.av-sky { background: linear-gradient(135deg, #5a8fb8, #3e6f96); }
.av-stone { background: linear-gradient(135deg, #8c7b6b, #6e5f51); }
.rev-meta { flex: 1; }
.rev-name { font-size: 15px; font-weight: 700; color: var(--text-dark); }
.rev-role { font-size: 12px; color: var(--text-soft); }
.rev-stars { display: flex; gap: 3px; margin-bottom: 12px; }
.rev-stars svg { width: 16px; height: 16px; color: var(--gold); }
.rev-text { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== Comparison Table ===== */
.cmp-wrap { overflow-x: auto; }
.cmp-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.cmp-table th, .cmp-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid rgba(44,24,16,.08); }
.cmp-table th { background: var(--bg-warm); font-weight: 700; color: var(--text-dark); }
.cmp-table td { color: var(--text-muted); }
.cmp-hl { background: rgba(198,93,59,.06); }
.cmp-table .yes { color: var(--forest); font-weight: 700; }
.cmp-table .no { color: #b04a4a; }
.cmp-table .part { color: var(--gold-hover); }

/* ===== FAQ ===== */
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-ivory); border-radius: var(--radius-sm); border: 1px solid rgba(44,24,16,.06);
  overflow: hidden; transition: all .25s ease;
}
.faq-item.open { box-shadow: var(--shadow); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px; cursor: pointer; font-size: 15px; font-weight: 600; color: var(--text-dark);
}
.faq-chevron { width: 20px; height: 20px; color: var(--text-soft); transition: transform .25s ease; flex-shrink: 0; }
.faq-item.open .faq-chevron { transform: rotate(180deg); color: var(--clay); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item.open .faq-a { max-height: 600px; }
.faq-a-inner { padding: 0 22px 20px; font-size: 14px; color: var(--text-muted); line-height: 1.8; }

/* ===== CTA Banner ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--clay), #a84a2d); color: #fff;
  border-radius: var(--radius); padding: 56px 48px; text-align: center; position: relative; overflow: hidden;
}
.cta-banner::before {
  content: ''; position: absolute; top: -60px; right: -60px; width: 200px; height: 200px;
  border-radius: 50%; background: rgba(255,255,255,.06); pointer-events: none;
}
.cta-eyebrow { font-size: 13px; font-weight: 600; opacity: .85; margin-bottom: 12px; display: inline-flex; align-items: center; gap: 8px; }
.cta-title { font-size: 30px; font-weight: 800; margin-bottom: 12px; }
.cta-desc { font-size: 16px; opacity: .85; margin-bottom: 28px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===== Download Page ===== */
.dl-hero { padding: 56px 0 64px; background: linear-gradient(160deg, var(--bg-cream) 0%, var(--bg-warm) 100%); }
.dl-hero-inner { text-align: center; max-width: 720px; margin: 0 auto; }
.dl-hero-chip {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px;
  border-radius: 20px; background: var(--clay-soft); color: var(--clay);
  font-size: 13px; font-weight: 600; margin-bottom: 18px;
}
.dl-hero-title { font-size: 38px; font-weight: 800; line-height: 1.2; margin-bottom: 14px; color: var(--text-dark); }
.dl-hero-sub { font-size: 17px; color: var(--text-muted); margin-bottom: 28px; }

.dl-main-wrap { max-width: 680px; margin: 0 auto 48px; }
.dl-main-card {
  background: var(--bg-ivory); border-radius: var(--radius); border: 1px solid rgba(44,24,16,.08);
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.dl-main-top {
  height: 5px; background: linear-gradient(90deg, var(--clay), var(--gold));
}
.dl-main-head { display: flex; align-items: center; gap: 18px; padding: 28px 32px 20px; }
.dl-main-icon {
  width: 56px; height: 56px; border-radius: 14px; background: var(--clay-soft);
  color: var(--clay); display: flex; align-items: center; justify-content: center;
}
.dl-main-name { font-size: 22px; font-weight: 800; color: var(--text-dark); }
.dl-main-meta { font-size: 13px; color: var(--text-soft); }
.dl-main-body { padding: 0 32px 28px; }
.dl-specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 20px; }
.dl-spec { background: var(--bg-cream); border-radius: var(--radius-sm); padding: 14px; }
.dl-spec-label { font-size: 11px; color: var(--text-soft); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 4px; }
.dl-spec-val { font-size: 15px; font-weight: 700; color: var(--text-dark); }
.dl-sec-badge {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px;
  border-radius: 20px; background: var(--forest-soft); color: var(--forest);
  font-size: 13px; font-weight: 600; margin-bottom: 20px;
}
.dl-main-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.dl-main-btns .btn { flex: 1; min-width: 160px; }

/* Other Platform Cards */
.op-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 48px; }
.op-card {
  background: var(--bg-ivory); border-radius: var(--radius); padding: 28px;
  border: 1px solid rgba(44,24,16,.06); transition: all .25s ease;
}
.op-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.op-icon { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.opi-forest { background: var(--forest-soft); color: var(--forest); }
.opi-gold { background: var(--gold-soft); color: var(--gold-hover); }
.opi-rose { background: #f5e0e4; color: #c45c6a; }
.op-name { font-size: 17px; font-weight: 700; margin-bottom: 4px; color: var(--text-dark); }
.op-ver { font-size: 12px; color: var(--text-soft); margin-bottom: 14px; }
.op-steps { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.op-steps li { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--text-muted); }
.op-step-n {
  width: 22px; height: 22px; border-radius: 50%; font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;
}
.op-step-n { background: var(--clay-soft); color: var(--clay); }

/* Guide Grid */
.guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-bottom: 48px; }
.guide-col-title { font-size: 18px; font-weight: 700; margin-bottom: 18px; display: flex; align-items: center; gap: 10px; color: var(--text-dark); }
.gct-dot { width: 10px; height: 10px; border-radius: 50%; }
.gct-clay { background: var(--clay); }
.gct-forest { background: var(--forest); }
.guide-steps { display: flex; flex-direction: column; gap: 14px; }
.gstep { display: flex; gap: 14px; }
.gstep-num {
  width: 32px; height: 32px; border-radius: 50%; font-size: 14px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.gsn-clay { background: var(--clay-soft); color: var(--clay); }
.gsn-forest { background: var(--forest-soft); color: var(--forest); }
.gstep-body { flex: 1; }
.gstep-title { font-size: 15px; font-weight: 700; margin-bottom: 4px; color: var(--text-dark); }
.gstep-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* Requirements */
.req-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 48px; }
.req-card {
  background: var(--bg-ivory); border-radius: var(--radius-sm); padding: 22px;
  border: 1px solid rgba(44,24,16,.06); text-align: center;
}
.req-icon { width: 40px; height: 40px; margin: 0 auto 12px; border-radius: 10px; display: flex; align-items: center; justify-content: center; }
.ri-clay { background: var(--clay-soft); color: var(--clay); }
.ri-forest { background: var(--forest-soft); color: var(--forest); }
.ri-gold { background: var(--gold-soft); color: var(--gold-hover); }
.ri-rose { background: #f5e0e4; color: #c45c6a; }
.req-title { font-size: 15px; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
.req-val { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* Version Timeline */
.ver-list { display: flex; flex-direction: column; gap: 16px; max-width: 820px; margin: 0 auto; }
.ver-item { display: flex; gap: 16px; }
.ver-dot-col { display: flex; flex-direction: column; align-items: center; }
.ver-dot { width: 14px; height: 14px; border-radius: 50%; border: 3px solid; }
.vd-clay { border-color: var(--clay); background: var(--clay-soft); }
.vd-forest { border-color: var(--forest); background: var(--forest-soft); }
.vd-gold { border-color: var(--gold); background: var(--gold-soft); }
.vd-rose { border-color: #c45c6a; background: #f5e0e4; }
.vd-sky { border-color: #5a8fb8; background: #e0ecf5; }
.ver-line { flex: 1; width: 2px; background: rgba(44,24,16,.08); margin-top: 6px; }
.ver-body { flex: 1; padding-bottom: 20px; border-bottom: 1px solid rgba(44,24,16,.06); }
.ver-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.ver-num { font-size: 16px; font-weight: 700; color: var(--text-dark); }
.ver-tag {
  font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 6px;
}
.vt-stable { background: var(--forest-soft); color: var(--forest); }
.vt-lts { background: var(--gold-soft); color: var(--gold-hover); }
.vt-beta { background: var(--clay-soft); color: var(--clay); }
.ver-date { font-size: 13px; color: var(--text-soft); margin-bottom: 6px; }
.ver-desc { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* Security Banner */
.sec-banner {
  background: var(--forest-soft); border-radius: var(--radius); padding: 28px 32px;
  display: flex; align-items: center; gap: 18px; margin-bottom: 48px;
}
.sec-banner-icon { width: 48px; height: 48px; border-radius: 12px; background: var(--forest); color: #fff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.sec-banner-text { flex: 1; }
.sec-banner-title { font-size: 17px; font-weight: 700; margin-bottom: 6px; color: var(--forest); }
.sec-banner-desc { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ===== Article Page ===== */
.art-hero { padding: 48px 0 40px; background: linear-gradient(160deg, var(--bg-cream) 0%, var(--bg-warm) 100%); }
.art-hero-inner { max-width: 900px; margin: 0 auto; text-align: center; }
.art-hero-crumb { font-size: 13px; color: var(--text-soft); margin-bottom: 16px; }
.art-hero-crumb a { color: var(--text-soft); }
.art-hero-crumb a:hover { color: var(--clay); }
.art-hero-crumb span { margin: 0 6px; }
.art-hero-title { font-size: 34px; font-weight: 800; line-height: 1.2; margin-bottom: 14px; color: var(--text-dark); }
.art-hero-sub { font-size: 16px; color: var(--text-muted); margin-bottom: 24px; }
.kw-strip { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.kw {
  padding: 5px 12px; border-radius: 20px; background: var(--bg-ivory);
  border: 1px solid rgba(44,24,16,.08); font-size: 12px; color: var(--text-muted);
}

.art-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.art-body { min-width: 0; }
.art-body h2 { font-size: 24px; font-weight: 800; margin: 40px 0 16px; color: var(--text-dark); }
.art-body h3 { font-size: 18px; font-weight: 700; margin: 28px 0 10px; color: var(--text-dark); }
.art-body p { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 14px; }
.art-body ul { margin: 0 0 14px 20px; color: var(--text-muted); }
.art-body ul li { margin-bottom: 6px; }
.art-body strong { color: var(--text-dark); }

.inline-cta {
  border-radius: var(--radius); padding: 24px 28px; margin: 28px 0;
  display: flex; align-items: center; gap: 20px; justify-content: space-between;
}
.inline-cta-clay { background: var(--clay-soft); }
.inline-cta-forest { background: var(--forest-soft); }
.inline-cta-gold { background: var(--gold-soft); }
.inline-cta-title { font-size: 17px; font-weight: 700; margin-bottom: 6px; color: var(--text-dark); }
.inline-cta-desc { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.inline-cta .btn { flex-shrink: 0; }

.tips-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 20px 0; }
.tip-card {
  background: var(--bg-ivory); border-radius: var(--radius-sm); padding: 18px;
  border: 1px solid rgba(44,24,16,.06);
}
.tip-num {
  width: 28px; height: 28px; border-radius: 50%; background: var(--clay); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; margin-bottom: 10px;
}
.tip-title { font-size: 15px; font-weight: 700; margin-bottom: 6px; color: var(--text-dark); }
.tip-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* Sidebar */
.sidebar { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 20px; }
.sbox { background: var(--bg-ivory); border-radius: var(--radius); padding: 22px; border: 1px solid rgba(44,24,16,.06); }
.sbox-title { font-size: 15px; font-weight: 700; margin-bottom: 14px; color: var(--text-dark); }
.sdl-btn {
  display: flex; align-items: center; gap: 12px; padding: 12px;
  border-radius: var(--radius-sm); background: var(--bg-cream); margin-bottom: 10px;
  border: 1px solid rgba(44,24,16,.06); cursor: pointer; transition: all .2s ease;
  width: 100%; text-align: left; font-family: inherit;
}
.sdl-btn:last-child { margin-bottom: 0; }
.sdl-btn:hover { border-color: var(--clay); background: var(--clay-soft); }
.sdl-btn-icon { width: 36px; height: 36px; border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.sdl-btn-info { flex: 1; }
.sdl-btn-name { font-size: 14px; font-weight: 600; color: var(--text-dark); }
.sdl-btn-ver { font-size: 11px; color: var(--text-soft); }
.sdl-btn.primary { background: var(--clay); border-color: var(--clay); }
.sdl-btn.primary .sdl-btn-name, .sdl-btn.primary .sdl-btn-ver { color: #fff; }
.sdl-btn.primary:hover { background: var(--clay-hover); }

.stoc { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.stoc li a { display: block; padding: 8px 0; font-size: 13px; color: var(--text-muted); border-bottom: 1px solid rgba(44,24,16,.04); }
.stoc li a:hover { color: var(--clay); text-decoration: none; }
.sstat { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sstat-item { text-align: center; padding: 10px; background: var(--bg-cream); border-radius: var(--radius-sm); }
.sstat-num { font-size: 18px; font-weight: 800; color: var(--clay); }
.sstat-lbl { font-size: 11px; color: var(--text-soft); }
.side-security { font-size: 12px; color: var(--text-soft); line-height: 1.6; }
.side-security svg { width: 16px; height: 16px; color: var(--forest); vertical-align: -3px; margin-right: 4px; }

/* ===== Footer ===== */
.site-footer { background: var(--bg-dark); color: rgba(250,246,241,.55); padding: 40px 0 28px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 16px; color: var(--text-light); }
.footer-brand-mark { width: 28px; height: 28px; border-radius: 6px; background: linear-gradient(135deg, var(--clay), var(--gold)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 12px; }
.footer-security { font-size: 13px; max-width: 480px; line-height: 1.6; }
.footer-note { font-size: 12px; color: rgba(250,246,241,.4); margin-top: 16px; text-align: center; border-top: 1px solid rgba(250,246,241,.08); padding-top: 16px; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .art-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .deep-row { grid-template-columns: 1fr; gap: 32px; }
  .deep-row.flip { direction: ltr; }
  .guide-grid { grid-template-columns: 1fr; }
  .plat-grid { grid-template-columns: repeat(2, 1fr); }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .arch-menu { display: none; }
  .arch-dl { display: none; }
  .nav-toggle { display: flex; }
  .hero-title { font-size: 34px; }
  .sec-title { font-size: 26px; }
  .feat-grid { grid-template-columns: 1fr; }
  .rev-grid { grid-template-columns: 1fr; }
  .plat-grid { grid-template-columns: 1fr; }
  .op-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .req-grid { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; }
  .dl-specs { grid-template-columns: repeat(2, 1fr); }
  .cta-banner { padding: 40px 24px; }
  .sec { padding: 52px 0; }
  .footer-inner { flex-direction: column; text-align: center; }
}
/* ===== News ===== */
.news-hero { background: linear-gradient(135deg, var(--bg-forest) 0%, #143d31 100%); color: var(--text-light); padding: 120px 0 80px; }
.news-hero-inner { max-width: 800px; }
.news-hero-chip { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); padding: 8px 18px; border-radius: 100px; font-size: 13px; font-weight: 600; margin-bottom: 24px; }
.news-hero-chip-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .5; } }
.news-hero-title { font-size: 48px; font-weight: 800; line-height: 1.15; margin-bottom: 18px; }
.news-hero-sub { font-size: 18px; color: rgba(250,246,241,.7); max-width: 600px; }

.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: var(--bg-ivory); border-radius: var(--radius); border: 1px solid rgba(44,24,16,.06); overflow: hidden; transition: all .3s ease; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-card-top { height: 4px; background: linear-gradient(90deg, var(--clay), var(--gold)); }
.news-card-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.news-card-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.news-card-date { font-size: 12px; color: var(--text-soft); }
.news-card-tag { font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 100px; }
.tag-clay { background: var(--clay-soft); color: var(--clay); }
.tag-forest { background: var(--forest-soft); color: var(--forest); }
.tag-gold { background: var(--gold-soft); color: #7a5c10; }
.news-card-title { font-size: 17px; font-weight: 700; line-height: 1.4; margin-bottom: 10px; }
.news-card-title a { color: var(--text-dark); }
.news-card-title a:hover { color: var(--clay); text-decoration: none; }
.news-card-excerpt { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 18px; flex: 1; }
.news-card-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 700; color: var(--clay); }
.news-card-link svg { width: 16px; height: 16px; transition: transform .2s ease; }
.news-card-link:hover svg { transform: translateX(3px); }

.news-full { max-width: 800px; margin: 0 auto; }
.news-back { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--text-muted); margin-bottom: 32px; }
.news-back:hover { color: var(--clay); }
.news-article { margin-bottom: 60px; padding-bottom: 60px; border-bottom: 1px solid rgba(44,24,16,.08); }
.news-article:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.news-article-header { margin-bottom: 28px; }
.news-article-header h2 { font-size: 32px; font-weight: 800; line-height: 1.25; margin-top: 12px; color: var(--text-dark); }
.news-article-content p { font-size: 16px; color: var(--text-muted); line-height: 1.85; margin-bottom: 18px; }
.news-article-content h3 { font-size: 20px; font-weight: 700; margin: 28px 0 14px; color: var(--text-dark); }
.news-article-content ul { margin: 0 0 18px 20px; }
.news-article-content li { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 8px; }
.news-article-content a { color: var(--clay); font-weight: 600; }

/* Article Page Meta Row */
.art-hero-meta-row { display: flex; align-items: center; gap: 10px; margin-top: 16px; justify-content: center; flex-wrap: wrap; }

/* Related Articles */
.nap-related { margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(44,24,16,.08); }
.nap-related h3 { font-size: 20px; font-weight: 700; margin-bottom: 18px; color: var(--text-dark); }
.nap-related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.nap-related-card {
  display: flex; flex-direction: column; gap: 10px; padding: 20px;
  background: var(--bg-cream); border-radius: var(--radius-sm);
  border: 1px solid rgba(44,24,16,.06); transition: all .25s ease;
}
.nap-related-card:hover { border-color: var(--clay); box-shadow: var(--shadow); text-decoration: none; }
.nap-related-card .news-card-tag { align-self: flex-start; }
.nap-related-title { font-size: 15px; font-weight: 600; color: var(--text-dark); line-height: 1.5; }

/* Section Label */
.sec-label { display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 16px; background: var(--clay-soft); color: var(--clay); }
.sec-label-dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; opacity: .7; }
.sec-white { background: #fff; }

@media (max-width: 768px) {
  .nap-related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .news-hero-title { font-size: 38px; }
}
@media (max-width: 768px) {
  .news-grid { grid-template-columns: 1fr; }
  .news-hero { padding: 100px 0 60px; }
  .news-hero-title { font-size: 32px; }
  .news-article-header h2 { font-size: 26px; }
}