/* ============================================
   Slate & Emerald — Modern SaaS Theme
   WPS Office Download Landing Site
   ============================================ */

:root {
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --emerald-700: #047857;
  --emerald-600: #059669;
  --emerald-500: #10b981;
  --emerald-400: #34d399;
  --emerald-300: #6ee7b7;
  --emerald-200: #a7f3d0;
  --emerald-glow: rgba(16, 185, 129, 0.12);
  --white: #ffffff;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.12);
  --shadow-emerald: 0 4px 24px rgba(16, 185, 129, 0.2);
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { 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", sans-serif;
  color: var(--slate-800);
  background: var(--slate-50);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

/* ============================================
   Topbar
   ============================================ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--slate-200);
  transition: var(--transition);
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--slate-900);
}
.logo svg { flex-shrink: 0; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--slate-600);
  border-radius: 999px;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--slate-900);
  background: var(--slate-100);
}
.nav-link.on {
  color: var(--emerald-700);
  background: var(--emerald-glow);
  font-weight: 600;
}
.nav-dl {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--white);
  background: var(--emerald-600);
  border-radius: 999px;
  transition: var(--transition);
}
.nav-dl:hover { background: var(--emerald-700); }

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 28px;
  border-radius: 999px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn svg { flex-shrink: 0; }
.btn-emerald {
  color: var(--white);
  background: var(--emerald-600);
  box-shadow: var(--shadow-emerald);
}
.btn-emerald:hover { background: var(--emerald-700); transform: translateY(-1px); }
.btn-dark {
  color: var(--white);
  background: var(--slate-900);
}
.btn-dark:hover { background: var(--slate-800); transform: translateY(-1px); }
.btn-outline {
  color: var(--slate-700);
  background: transparent;
  border: 2px solid var(--slate-300);
}
.btn-outline:hover { border-color: var(--emerald-500); color: var(--emerald-600); }
.btn-outline-w {
  color: var(--white);
  background: transparent;
  border: 2px solid rgba(255,255,255,.3);
}
.btn-outline-w:hover { border-color: var(--emerald-400); color: var(--emerald-400); }
.btn-ghost {
  color: var(--emerald-600);
  background: var(--emerald-glow);
}
.btn-ghost:hover { background: rgba(16, 185, 129, 0.2); }
.btn-white {
  color: var(--slate-900);
  background: var(--white);
  box-shadow: var(--shadow);
}
.btn-white:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn:disabled { opacity: .6; cursor: not-allowed; transform: none !important; }

/* ============================================
   Layout
   ============================================ */
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.sec {
  padding: 80px 0;
}
.sec-dark {
  background: var(--slate-900);
  color: var(--slate-100);
}
.sec-surface {
  background: var(--slate-800);
  color: var(--slate-100);
}
.sec-light {
  background: var(--slate-100);
}
.sec-white {
  background: var(--white);
}
.sec-emerald {
  background: linear-gradient(135deg, var(--emerald-700) 0%, var(--emerald-500) 100%);
  color: var(--white);
}
.sec-head {
  text-align: center;
  margin-bottom: 56px;
}
.sec-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--emerald-600);
  background: var(--emerald-glow);
  border-radius: 999px;
  margin-bottom: 16px;
}
.sec-dark .sec-chip {
  color: var(--emerald-400);
  background: rgba(16, 185, 129, 0.15);
}
.sec-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--slate-900);
  margin-bottom: 12px;
}
.sec-dark .sec-title,
.sec-surface .sec-title,
.sec-emerald .sec-title { color: var(--white); }
.sec-sub {
  font-size: 17px;
  color: var(--slate-500);
  max-width: 600px;
  margin: 0 auto;
}
.sec-dark .sec-sub { color: var(--slate-400); }
.sec-emerald .sec-sub { color: rgba(255,255,255,.8); }

/* ============================================
   Hero
   ============================================ */
.hero {
  background: linear-gradient(160deg, var(--slate-950) 0%, var(--slate-900) 40%, #0b2e1f 100%);
  color: var(--white);
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16,185,129,.18) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(52,211,153,.1) 0%, transparent 70%);
  bottom: -50px;
  left: 10%;
  pointer-events: none;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--emerald-400);
  background: rgba(16,185,129,.12);
  border: 1px solid rgba(16,185,129,.2);
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero-chip svg { width: 14px; height: 14px; }
.hero-title {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -.02em;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--emerald-400), var(--emerald-300));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px;
  color: var(--slate-400);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-trust {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.hero-trust-item {
  display: flex;
  flex-direction: column;
}
.hero-trust-val {
  font-size: 22px;
  font-weight: 800;
  color: var(--emerald-400);
}
.hero-trust-lbl {
  font-size: 12px;
  color: var(--slate-500);
  margin-top: 2px;
}

/* Hero visual */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-mockup {
  width: 100%;
  max-width: 460px;
  background: var(--slate-800);
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-700);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.mockup-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: var(--slate-700);
}
.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.mockup-dot:nth-child(1) { background: #ef4444; }
.mockup-dot:nth-child(2) { background: #f59e0b; }
.mockup-dot:nth-child(3) { background: var(--emerald-500); }
.mockup-body {
  padding: 24px;
  min-height: 200px;
}
.mockup-line {
  height: 10px;
  border-radius: 5px;
  margin-bottom: 10px;
  background: var(--slate-700);
}
.mockup-line:nth-child(1) { width: 70%; }
.mockup-line:nth-child(2) { width: 90%; }
.mockup-line:nth-child(3) { width: 55%; }
.mockup-line:nth-child(4) { width: 80%; height: 40px; background: linear-gradient(90deg, rgba(16,185,129,.15), rgba(52,211,153,.08)); border: 1px solid rgba(16,185,129,.2); }
.mockup-line:nth-child(5) { width: 65%; margin-top: 16px; }
.mockup-line:nth-child(6) { width: 85%; }
.hero-float-badge {
  position: absolute;
  background: rgba(30,41,59,.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--slate-700);
  border-radius: var(--radius);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--slate-200);
  box-shadow: var(--shadow-lg);
}
.hero-float-badge svg { flex-shrink: 0; }
.hero-float-badge.badge-top { top: 10%; right: -10px; }
.hero-float-badge.badge-bottom { bottom: 15%; left: -20px; }

/* ============================================
   Command Strips (Feature rows)
   ============================================ */
.cmd-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.cmd-row {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 28px 32px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
  transition: var(--transition);
}
.cmd-row:hover {
  border-color: var(--emerald-400);
  box-shadow: var(--shadow-md), 0 0 0 3px var(--emerald-glow);
  transform: translateY(-2px);
}
.cmd-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--emerald-glow);
  color: var(--emerald-600);
}
.cmd-icon svg { width: 28px; height: 28px; }
.cmd-body { flex: 1; }
.cmd-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 4px;
}
.cmd-desc {
  font-size: 14px;
  color: var(--slate-500);
  line-height: 1.6;
}
.cmd-tag {
  flex-shrink: 0;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--emerald-600);
  background: var(--emerald-glow);
  border-radius: 999px;
  letter-spacing: .05em;
}

/* ============================================
   Platform Tower Cards
   ============================================ */
.plat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.plat-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
  transition: var(--transition);
}
.plat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--emerald-400);
}
.plat-card.featured {
  border-color: var(--emerald-500);
  background: linear-gradient(180deg, var(--emerald-glow), var(--white));
  box-shadow: var(--shadow-emerald);
}
.plat-ico {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--slate-100);
  color: var(--slate-700);
}
.plat-card.featured .plat-ico {
  background: var(--emerald-glow);
  color: var(--emerald-600);
}
.plat-ico svg { width: 28px; height: 28px; }
.plat-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 4px;
}
.plat-ver {
  font-size: 13px;
  color: var(--slate-500);
  margin-bottom: 16px;
}
.plat-card .btn { width: 100%; }

/* ============================================
   Showcase Panels (deep features)
   ============================================ */
.showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}
.showcase.flip .showcase-media { order: -1; }
.showcase-info { padding: 16px 0; }
.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--emerald-600);
  background: var(--emerald-glow);
  border-radius: 999px;
  margin-bottom: 16px;
}
.sec-dark .showcase-badge { color: var(--emerald-400); }
.showcase-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 12px;
  line-height: 1.3;
}
.sec-dark .showcase-title { color: var(--white); }
.showcase-desc {
  font-size: 15px;
  color: var(--slate-500);
  line-height: 1.7;
  margin-bottom: 20px;
}
.sec-dark .showcase-desc { color: var(--slate-400); }
.showcase-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.showcase-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--slate-600);
}
.sec-dark .showcase-list li { color: var(--slate-300); }
.showcase-list svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--emerald-500);
  margin-top: 2px;
}
.showcase-media {
  background: var(--slate-100);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  position: relative;
  overflow: hidden;
}
.sec-dark .showcase-media { background: var(--slate-800); }
.showcase-media svg { width: 120px; height: 120px; opacity: .6; }

/* ============================================
   Reviews
   ============================================ */
.rev-scroll {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.rev-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
  padding: 28px;
  transition: var(--transition);
}
.rev-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.rev-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
  color: #f59e0b;
}
.rev-stars svg { width: 16px; height: 16px; }
.rev-text {
  font-size: 14px;
  color: var(--slate-600);
  line-height: 1.7;
  margin-bottom: 16px;
}
.rev-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.rev-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--emerald-glow);
  color: var(--emerald-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}
.rev-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--slate-900);
}
.rev-role {
  font-size: 12px;
  color: var(--slate-500);
}

/* ============================================
   Stats Banner
   ============================================ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-block {
  padding: 32px 16px;
}
.stat-num {
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--emerald-400), var(--emerald-300));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}
.stat-lbl {
  font-size: 14px;
  color: var(--slate-400);
}

/* ============================================
   Comparison Table
   ============================================ */
.cmp-wrap { overflow-x: auto; }
.cmp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.cmp-table thead {
  background: var(--slate-900);
  color: var(--white);
}
.cmp-table th {
  padding: 14px 20px;
  font-weight: 600;
  text-align: left;
}
.cmp-table td {
  padding: 13px 20px;
  border-bottom: 1px solid var(--slate-200);
}
.cmp-table tbody tr:hover { background: var(--emerald-glow); }
.cmp-table .hl {
  background: rgba(16,185,129,.06);
  font-weight: 600;
}
.cmp-check { color: var(--emerald-500); font-weight: 700; }
.cmp-cross { color: var(--slate-400); }

/* ============================================
   FAQ Accordion
   ============================================ */
.faq-search {
  max-width: 500px;
  margin: 0 auto 40px;
  position: relative;
}
.faq-search input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  border: 2px solid var(--slate-200);
  border-radius: 999px;
  font-size: 15px;
  background: var(--white);
  transition: var(--transition);
  outline: none;
  font-family: inherit;
}
.faq-search input:focus { border-color: var(--emerald-500); }
.faq-search svg {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--slate-400);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.faq-item {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open {
  border-color: var(--emerald-400);
  box-shadow: 0 0 0 3px var(--emerald-glow);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--slate-800);
  cursor: pointer;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-family: inherit;
}
.faq-q:hover { color: var(--emerald-600); }
.faq-q svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--slate-400);
  transition: var(--transition);
}
.faq-item.open .faq-q svg { transform: rotate(180deg); color: var(--emerald-500); }
.faq-a {
  display: none;
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--slate-600);
  line-height: 1.7;
}
.faq-item.open .faq-a { display: block; }

/* ============================================
   CTA Block
   ============================================ */
.cta-block {
  text-align: center;
  padding: 64px 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--slate-900) 0%, #0b2e1f 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.cta-block::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16,185,129,.2) 0%, transparent 70%);
  top: -150px;
  right: -100px;
}
.cta-block h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
}
.cta-block p {
  font-size: 16px;
  color: var(--slate-400);
  margin-bottom: 28px;
  position: relative;
}
.cta-block .btn { position: relative; }

/* ============================================
   Download Hero
   ============================================ */
.dl-hero {
  background: linear-gradient(160deg, var(--slate-950) 0%, var(--slate-900) 50%, #0b2e1f 100%);
  color: var(--white);
  padding: 100px 0 60px;
  position: relative;
  overflow: hidden;
}
.dl-hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16,185,129,.12) 0%, transparent 70%);
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
}
.dl-hero-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}
.dl-hero h1 {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 12px;
}
.dl-hero p {
  font-size: 17px;
  color: var(--slate-400);
  margin-bottom: 32px;
}
.dl-main-card {
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 540px;
  margin: 0 auto;
}
.dl-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.dl-meta-item {
  text-align: center;
}
.dl-meta-val {
  font-size: 16px;
  font-weight: 700;
  color: var(--emerald-400);
}
.dl-meta-lbl {
  font-size: 12px;
  color: var(--slate-500);
  margin-top: 2px;
}
.dl-main-card .btn { width: 100%; }

/* ============================================
   Guide Steps
   ============================================ */
.steps-timeline {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}
.steps-timeline::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--slate-200);
}
.step-item {
  display: flex;
  gap: 24px;
  padding-bottom: 32px;
  position: relative;
}
.step-item:last-child { padding-bottom: 0; }
.step-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--emerald-600);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  z-index: 1;
}
.step-body { padding-top: 10px; }
.step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 4px;
}
.step-desc {
  font-size: 14px;
  color: var(--slate-500);
  line-height: 1.6;
}

/* ============================================
   Requirements Grid
   ============================================ */
.req-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.req-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 24px;
}
.req-card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--slate-500);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.req-card-val {
  font-size: 15px;
  font-weight: 600;
  color: var(--slate-900);
}

/* ============================================
   Version Log
   ============================================ */
.ver-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.ver-item {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.ver-tag {
  flex-shrink: 0;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 700;
  color: var(--emerald-600);
  background: var(--emerald-glow);
  border-radius: 999px;
}
.ver-body { flex: 1; }
.ver-date {
  font-size: 12px;
  color: var(--slate-500);
  margin-bottom: 4px;
}
.ver-text {
  font-size: 14px;
  color: var(--slate-700);
  line-height: 1.6;
}

/* ============================================
   Security Banner
   ============================================ */
.sec-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px 24px;
  background: var(--emerald-glow);
  border: 1px solid rgba(16,185,129,.2);
  border-radius: var(--radius);
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.sec-banner svg { flex-shrink: 0; color: var(--emerald-600); }
.sec-banner span {
  font-size: 14px;
  font-weight: 600;
  color: var(--emerald-700);
}

/* ============================================
   Article Page
   ============================================ */
.article-hero {
  background: linear-gradient(160deg, var(--slate-950), var(--slate-900));
  color: var(--white);
  padding: 100px 0 60px;
  text-align: center;
}
.article-hero h1 {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 14px;
}
.article-hero p {
  font-size: 17px;
  color: var(--slate-400);
  max-width: 600px;
  margin: 0 auto 24px;
}
.kw-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  max-width: 700px;
  margin: 0 auto;
}
.kw {
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--emerald-400);
  background: rgba(16,185,129,.1);
  border: 1px solid rgba(16,185,129,.15);
  border-radius: 999px;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
}
.article-body h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--slate-900);
  margin: 40px 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--emerald-400);
}
.article-body h2:first-child { margin-top: 0; }
.article-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--slate-800);
  margin: 24px 0 10px;
}
.article-body p {
  font-size: 15px;
  color: var(--slate-600);
  line-height: 1.8;
  margin-bottom: 16px;
}
.article-body ul, .article-body ol {
  margin: 12px 0 20px 24px;
  font-size: 15px;
  color: var(--slate-600);
  line-height: 1.8;
}
.article-body li { margin-bottom: 6px; }
.inline-cta {
  margin: 32px 0;
  padding: 28px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--slate-900), #0b2e1f);
  color: var(--white);
  text-align: center;
}
.inline-cta h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--white) !important;
  margin: 0 0 6px !important;
}
.inline-cta p {
  font-size: 14px;
  color: var(--slate-400) !important;
  margin-bottom: 16px !important;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.sbox {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 24px;
}
.sbox-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--emerald-400);
}
.sbox .btn { width: 100%; margin-bottom: 8px; }
.sbox .btn:last-child { margin-bottom: 0; }
.stoc {
  list-style: none;
}
.stoc li {
  margin-bottom: 6px;
}
.stoc a {
  font-size: 13px;
  color: var(--slate-600);
  display: block;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  transition: var(--transition);
}
.stoc a:hover {
  color: var(--emerald-600);
  background: var(--emerald-glow);
  border-left-color: var(--emerald-500);
}
.sstat {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sstat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.sstat-lbl {
  font-size: 13px;
  color: var(--slate-500);
}
.sstat-val {
  font-size: 15px;
  font-weight: 700;
  color: var(--emerald-600);
}
.side-security {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: var(--emerald-glow);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  color: var(--emerald-700);
}
.side-security svg { flex-shrink: 0; }

/* ============================================
   Tips Grid
   ============================================ */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 16px 0;
}
.tip-card {
  padding: 20px;
  background: var(--slate-50);
  border-radius: var(--radius);
  border: 1px solid var(--slate-200);
}
.tip-card h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--slate-800);
  margin-bottom: 6px;
}
.tip-card p {
  font-size: 13px;
  color: var(--slate-500);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: var(--slate-900);
  color: var(--slate-400);
  padding: 40px 0;
  text-align: center;
}
.footer-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--slate-200);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.footer-security {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--emerald-400);
  margin-bottom: 10px;
}
.footer-security svg { width: 16px; height: 16px; }
.footer-note {
  font-size: 12px;
  color: var(--slate-500);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ============================================
   Spin Animation
   ============================================ */
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }
  .hero-trust { justify-content: center; }
  .hero-visual { margin-top: 32px; }
  .hero-float-badge.badge-top { right: 0; }
  .hero-float-badge.badge-bottom { left: 0; }
  .showcase { grid-template-columns: 1fr; }
  .showcase.flip .showcase-media { order: 0; }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .plat-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .sec { padding: 56px 0; }
  .hero-inner { padding: 72px 24px 56px; }
  .hero-title { font-size: 32px; }
  .sec-title { font-size: 28px; }
  .topbar-inner { height: 56px; }
  .nav-list { gap: 2px; }
  .nav-link { padding: 6px 12px; font-size: 13px; }
  .nav-dl { padding: 6px 14px; font-size: 12px; }
  .plat-grid { grid-template-columns: 1fr 1fr; }
  .rev-scroll { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .stat-num { font-size: 30px; }
  .cmd-row { flex-direction: column; text-align: center; }
  .cmd-tag { align-self: center; }
  .dl-meta { grid-template-columns: 1fr; gap: 10px; }
  .dl-hero h1 { font-size: 28px; }
  .article-hero h1 { font-size: 28px; }
  .req-grid { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; }
  .kw-cloud { max-width: 90%; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 26px; }
  .hero-trust { flex-direction: column; gap: 16px; align-items: center; }
  .plat-grid { grid-template-columns: 1fr; }
  .nav-dl { display: none; }
}