/* Stirling PDF - 扁平现代专业 */
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #dc2626;
  --primary-700: #b91c1c;
  --primary-50: #fef2f2;
  --primary-10: rgba(220, 38, 38, 0.1);
  --orange: #f97316;
  --orange-300: #fdba74;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --muted-2: #4b5563;
  --border: #e8e6e4;
  --card: #ffffff;
  --secondary: #f6f5f4;
  --radius: 0.75rem;
  --radius-lg: 1rem;
  --radius-2xl: 1.5rem;
  --radius-3xl: 1.75rem;
  --maxw: 80rem;
}
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; color: var(--fg); }

/* ===== Layout helpers ===== */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }
@media (min-width: 640px) { .container { padding-left: 1.5rem; padding-right: 1.5rem; } }
@media (min-width: 1024px) { .container { padding-left: 2rem; padding-right: 2rem; } }
.section { padding-top: 4rem; padding-bottom: 4rem; }
@media (min-width: 640px) { .section { padding-top: 6rem; padding-bottom: 6rem; } }
@media (min-width: 1024px) { .section { padding-top: 3rem; padding-bottom: 3rem; } }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.maxw-3xl { max-width: 48rem; }
.gradient-text {
  background: linear-gradient(to right, var(--primary), var(--orange));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.bg-grid {
  background-image:
    linear-gradient(to right, #e8e6e4 1px, transparent 1px),
    linear-gradient(to bottom, #e8e6e4 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  width: 100%; border-bottom: 1px solid transparent;
  background: rgba(255,255,255,0.6); backdrop-filter: blur(8px);
  transition: all .3s ease;
}
.site-header.scrolled {
  border-color: var(--border);
  background: rgba(255,255,255,0.85);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  height: 4rem; max-width: var(--maxw); margin: 0 auto;
  padding-left: 1rem; padding-right: 1rem;
}
@media (min-width: 640px) { .header-inner { padding-left: 1.5rem; padding-right: 1.5rem; } }
@media (min-width: 1024px) { .header-inner { padding-left: 2rem; padding-right: 2rem; } }
.logo-link { display: flex; align-items: center; gap: 0.625rem; flex-shrink: 0; }
.logo-link img { height: 2.25rem; width: 2.25rem; }
.logo-text { display: flex; flex-direction: column; line-height: 1.3; }
.logo-text .name { font-size: 1rem; font-weight: 700; letter-spacing: -0.02em; }
.logo-text .sub { font-size: 11px; color: var(--muted); }
.desktop-nav { display: none; align-items: center; gap: 0.25rem; }
@media (min-width: 1024px) { .desktop-nav { display: flex; } }
.desktop-nav a {
  padding: 0.5rem 0.75rem; border-radius: 0.375rem;
  font-size: 0.875rem; font-weight: 500; color: var(--muted);
  transition: all .15s;
}
.desktop-nav a:hover { color: var(--fg); background: rgba(246,245,244,0.6); }
.desktop-nav a.active { color: var(--primary); background: var(--primary-10); }
.header-actions { display: flex; align-items: center; gap: 0.5rem; }
.icon-btn {
  display: none; align-items: center; justify-content: center;
  height: 2.5rem; width: 2.5rem; border-radius: 0.5rem;
  color: var(--muted); transition: all .15s;
}
.icon-btn:hover { color: var(--fg); background: rgba(246,245,244,0.6); }
@media (min-width: 640px) { .icon-btn.gh { display: inline-flex; } }
.icon-btn svg { width: 1.25rem; height: 1.25rem; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-size: 0.875rem; font-weight: 500; line-height: 1;
  height: 2.5rem; padding: 0 1rem; border-radius: var(--radius);
  transition: all .15s; white-space: nowrap;
}
.btn-lg { height: 3rem; padding: 0 2rem; font-size: 1rem; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-700); }
.btn-outline { border: 1px solid var(--border); background: var(--bg); color: var(--fg); }
.btn-outline:hover { background: var(--secondary); }
.btn-ghost { color: var(--muted); }
.btn-ghost:hover { color: var(--fg); background: var(--secondary); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: rgba(255,255,255,0.9); }
.btn-white-outline { border: 1px solid rgba(255,255,255,0.4); background: rgba(255,255,255,0.1); color: #fff; }
.btn-white-outline:hover { background: rgba(255,255,255,0.2); }
.btn-white-ghost { color: #fff; }
.btn-white-ghost:hover { background: rgba(255,255,255,0.15); }
.btn-block { width: 100%; }
@media (min-width: 640px) { .btn-sm-auto { width: auto; } }

/* ===== Mobile menu ===== */
.mobile-toggle { display: inline-flex; align-items: center; justify-content: center; height: 2.5rem; width: 2.5rem; border-radius: 0.5rem; color: var(--fg); }
@media (min-width: 1024px) { .mobile-toggle { display: none; } }
.mobile-toggle svg { width: 1.25rem; height: 1.25rem; }
.mobile-menu {
  position: fixed; inset: 0; z-index: 60; display: none;
  background: rgba(0,0,0,0.4);
}
.mobile-menu.open { display: block; }
.mobile-menu-panel {
  position: absolute; top: 0; right: 0; bottom: 0; width: 17.5rem;
  background: #fff; display: flex; flex-direction: column;
  box-shadow: -4px 0 16px rgba(0,0,0,0.1);
}
.mobile-menu-head { display: flex; align-items: center; gap: 0.625rem; padding: 1rem 1.25rem; border-bottom: 1px solid var(--border); }
.mobile-menu-head img { height: 2rem; width: 2rem; }
.mobile-menu-head .name { font-weight: 700; }
.mobile-menu-nav { display: flex; flex-direction: column; gap: 0.25rem; padding: 1rem; }
.mobile-menu-nav a { padding: 0.625rem 0.75rem; border-radius: 0.5rem; font-size: 0.875rem; font-weight: 500; }
.mobile-menu-nav a:hover { background: var(--secondary); }
.mobile-menu-nav a.active { background: var(--primary-10); color: var(--primary); }
.mobile-menu-foot { margin-top: auto; padding: 1rem; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 0.5rem; }
.mobile-menu-close { position: absolute; top: 1rem; right: 1rem; height: 2rem; width: 2rem; display: flex; align-items: center; justify-content: center; border-radius: 0.375rem; color: var(--muted); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  border-bottom: 1px solid rgba(220,38,38,0.12);
  background:
    radial-gradient(circle at left center, rgba(220,38,38,0.08), transparent 28rem),
    linear-gradient(180deg, rgba(254,242,242,0.72), rgba(255,255,255,0.94));
}
.breadcrumb .container { padding-top: 0.875rem; padding-bottom: 0.875rem; }
.breadcrumb ol {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  max-width: 100%;
  border: 1px solid rgba(220,38,38,0.14);
  border-radius: 9999px;
  background: rgba(255,255,255,0.82);
  padding: 0.375rem 0.75rem 0.375rem 0.4375rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1;
  box-shadow: 0 10px 24px rgba(220,38,38,0.06);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 0.375rem; min-width: 0; }
.breadcrumb a {
  display: inline-flex;
  align-items: center;
  color: var(--muted-2);
  transition: color .15s, background .15s, transform .15s;
}
.breadcrumb a:hover { color: var(--primary); transform: translateY(-1px); }
.breadcrumb .sep {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(220,38,38,0.42);
}
.breadcrumb .sep svg { width: 0.875rem; height: 0.875rem; }
.breadcrumb .current {
  min-width: 0;
  overflow: hidden;
  color: var(--fg);
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.breadcrumb .home-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.875rem;
  height: 1.875rem;
  border-radius: 9999px;
  background: var(--primary-10);
  color: var(--primary);
}
.breadcrumb .home-icon svg { width: 1rem; height: 1rem; }
@media (max-width: 480px) {
  .breadcrumb .container { padding-top: 0.625rem; padding-bottom: 0.625rem; }
  .breadcrumb ol {
    display: flex;
    width: 100%;
    border-radius: var(--radius);
    padding-right: 0.625rem;
  }
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative; overflow: hidden; border-bottom: 1px solid var(--border);
  background: linear-gradient(to bottom, rgba(254,242,242,0.7), #fff);
}
.page-hero .grid-bg { position: absolute; inset: 0; opacity: 0.4; -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%); mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%); }
.page-hero .blob1 { position: absolute; top: -5rem; right: 2.5rem; height: 18rem; width: 18rem; border-radius: 50%; background: rgba(220,38,38,0.15); filter: blur(48px); }
.page-hero .blob2 { position: absolute; bottom: 0; left: -4rem; height: 16rem; width: 16rem; border-radius: 50%; background: rgba(253,186,116,0.2); filter: blur(48px); }
.page-hero .container { position: relative; padding-top: 3.5rem; padding-bottom: 3.5rem; }
@media (min-width: 640px) { .page-hero .container { padding-top: 4rem; padding-bottom: 4rem; } }
@media (min-width: 1024px) { .page-hero .container { padding-top: 5rem; padding-bottom: 5rem; } }
.page-hero .inner { max-width: 48rem; margin: 0 auto; text-align: center; }
.badge-pill { display: inline-block; border-radius: 9999px; background: var(--primary-10); padding: 0.375rem 1rem; font-size: 0.875rem; font-weight: 500; color: var(--primary); }
.page-hero h1 { margin-top: 1rem; font-size: 1.875rem; font-weight: 800; letter-spacing: -0.02em; }
@media (min-width: 640px) { .page-hero h1 { font-size: 2.25rem; } }
@media (min-width: 1024px) { .page-hero h1 { font-size: 3rem; } }
.page-hero .subtitle { margin: 1.25rem auto 0; max-width: 42rem; font-size: 1rem; color: var(--muted); line-height: 1.7; }
@media (min-width: 640px) { .page-hero .subtitle { font-size: 1.125rem; } }

/* ===== Hero (home) ===== */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(to bottom, rgba(254,242,242,0.6), #fff, #fff);
}
.hero .grid-bg { position: absolute; inset: 0; opacity: 0.4; -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%); mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%); }
.hero .blob1 { position: absolute; top: -6rem; right: -6rem; height: 24rem; width: 24rem; border-radius: 50%; background: rgba(220,38,38,0.15); filter: blur(64px); }
.hero .blob2 { position: absolute; top: 10rem; left: -6rem; height: 20rem; width: 20rem; border-radius: 50%; background: rgba(253,186,116,0.2); filter: blur(64px); }
.hero .container { position: relative; padding-top: 4rem; padding-bottom: 5rem; }
@media (min-width: 1024px) { .hero .container { padding-top: 6rem; padding-bottom: 7rem; } }
.hero-grid { display: grid; gap: 3rem; align-items: center; }
@media (min-width: 1024px) { .hero-grid { grid-template-columns: 1fr 1fr; } }
.hero-left { text-align: center; }
@media (min-width: 1024px) { .hero-left { text-align: left; } }
.hero-badge { display: inline-flex; align-items: center; gap: 0.375rem; margin-bottom: 1.25rem; padding: 0.25rem 0.75rem; border: 1px solid rgba(220,38,38,0.3); background: var(--primary-50); color: var(--primary); border-radius: 9999px; font-size: 0.875rem; }
.hero-badge svg{width:24px;}
.hero h1 { font-size: 2.25rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; }
@media (min-width: 640px) { .hero h1 { font-size: 3rem; } }
@media (min-width: 1024px) { .hero h1 { font-size: 3.75rem; } }
.hero .lead { margin: 1.5rem auto 0; max-width: 36rem; font-size: 1rem; color: var(--muted); line-height: 1.7; }
@media (min-width: 640px) { .hero .lead { font-size: 1.125rem; } }
@media (min-width: 1024px) { .hero .lead { margin-left: 0; margin-right: 0; } }
.hero-cta { margin-top: 2rem; display: flex; flex-direction: column; align-items: center; gap: 0.75rem; }
@media (min-width: 640px) { .hero-cta { flex-direction: row; } }
@media (min-width: 1024px) { .hero-cta { justify-content: flex-start; } }
.hero-cta .btn { width: 100%; }
@media (min-width: 640px) { .hero-cta .btn { width: auto; } }
.hero-trust { margin-top: 1.75rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 0.625rem 1.25rem; font-size: 0.875rem; color: var(--muted); }
@media (min-width: 1024px) { .hero-trust { justify-content: flex-start; } }
.hero-trust span { display: inline-flex; align-items: center; gap: 0.375rem; }
.hero-trust svg { width: 1rem; height: 1rem; color: var(--primary); }
.hero-right { position: relative; }
.hero-right .glow { position: absolute; inset: -1rem; border-radius: var(--radius-2xl); background: linear-gradient(to top right, rgba(220,38,38,0.2), rgba(253,186,116,0.2)); filter: blur(32px); }
.hero-right .img-wrap { position: relative; overflow: hidden; border-radius: var(--radius-lg); border: 1px solid var(--border); background: #fff; box-shadow: 0 25px 50px -12px rgba(220,38,38,0.1); }
.hero-right .float-card { position: absolute; display: none; align-items: center; gap: 0.75rem; padding: 0.75rem; border-radius: var(--radius); border: 1px solid var(--border); background: #fff; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
@media (min-width: 640px) { .hero-right .float-card { display: flex; } }
.hero-right .float-card .ic { display: flex; align-items: center; justify-content: center; height: 2.5rem; width: 2.5rem; border-radius: var(--radius); background: var(--primary-10); color: var(--primary); }
.float-bl { bottom: -1.25rem; left: -1.25rem; }
.float-tr { top: -1.25rem; right: -0.75rem; }

/* Stats bar */
.stats-bar { margin-top: 4rem; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; border-radius: var(--radius-2xl); border: 1px solid var(--border); background: rgba(255,255,255,0.6); padding: 1.5rem; backdrop-filter: blur(8px); }
@media (min-width: 1024px) { .stats-bar { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 640px) { .stats-bar { margin-top: 5rem; } }
.stat-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.5rem; }
.stat-item .ic { display: flex; align-items: center; justify-content: center; height: 2.75rem; width: 2.75rem; flex-shrink: 0; border-radius: var(--radius); background: var(--primary-10); color: var(--primary); }
.stat-item .val { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; }
.stat-item .lbl { font-size: 0.75rem; color: var(--muted); }

/* ===== Section header ===== */
.sec-head { max-width: 48rem; margin: 0 auto; text-align: center; }
.sec-head h2 { margin-top: 1rem; font-size: 1.875rem; font-weight: 700; letter-spacing: -0.02em; }
@media (min-width: 640px) { .sec-head h2 { font-size: 2.25rem; } }
.sec-head p { margin-top: 1rem; font-size: 1rem; color: var(--muted); line-height: 1.7; }
@media (min-width: 640px) { .sec-head p { font-size: 1.125rem; } }
.sec-head-flex { display: flex; flex-direction: column; align-items: flex-start; gap: 1rem; }
@media (min-width: 640px) { .sec-head-flex { flex-direction: row; align-items: flex-end; justify-content: space-between; } }
.sec-head-flex .left { max-width: 36rem; }
.sec-head-flex h2 { margin-top: 1rem; font-size: 1.875rem; font-weight: 700; }
@media (min-width: 640px) { .sec-head-flex h2 { font-size: 2.25rem; } }
.sec-head-flex p { margin-top: 1rem; color: var(--muted); line-height: 1.7; }

/* ===== Feature cards (preview) ===== */
.feat-grid { margin-top: 2.5rem; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (min-width: 640px) { .feat-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .feat-grid { grid-template-columns: repeat(4, 1fr); } }
.feat-card { border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.25rem; transition: all .2s; }
.feat-card:hover { transform: translateY(-4px); border-color: rgba(220,38,38,0.3); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
.feat-card .ic { display: flex; align-items: center; justify-content: center; height: 2.75rem; width: 2.75rem; border-radius: var(--radius); background: var(--primary-10); color: var(--primary); transition: all .2s; }
.feat-card:hover .ic { background: var(--primary); color: #fff; }
.feat-card h3 { margin-top: 0.75rem; font-size: 1rem; font-weight: 700; }
.feat-card p { margin-top: 0.25rem; font-size: 0.875rem; color: var(--muted); }
.feat-card svg { width: 1.25rem; height: 1.25rem; }

/* feature strip */
.feat-strip { margin-top: 2rem; display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1.5rem; border-radius: var(--radius-2xl); background: rgba(246,245,244,0.5); padding: 1.25rem; font-size: 0.875rem; color: var(--muted-2); }
.feat-strip span { display: inline-flex; align-items: center; gap: 0.375rem; }
.feat-strip svg { width: 1rem; height: 1rem; color: var(--primary); }

/* ===== Feature category (full) ===== */
.fcat { border-radius: var(--radius-3xl); border: 1px solid var(--border); background: rgba(255,255,255,0.5); padding: 1.5rem; }
@media (min-width: 640px) { .fcat { padding: 2rem; } }
.fcat + .fcat { margin-top: 2rem; }
.fcat-head { display: flex; align-items: center; gap: 1rem; }
.fcat-head .ic { display: flex; align-items: center; justify-content: center; height: 3rem; width: 3rem; border-radius: var(--radius-2xl); color: #fff; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
.fcat-head .ic svg { width: 1.5rem; height: 1.5rem; }
.fcat-head h3 { font-size: 1.25rem; font-weight: 700; }
.fcat-head p { margin-top: 0.125rem; font-size: 0.875rem; color: var(--muted); }
.fcat-items { margin-top: 1.5rem; display: grid; gap: 0.75rem; }
@media (min-width: 640px) { .fcat-items { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .fcat-items { grid-template-columns: 1fr 1fr 1fr; } }
.fcat-item { display: flex; align-items: flex-start; gap: 0.75rem; border: 1px solid var(--border); background: #fff; border-radius: var(--radius); padding: 1rem; transition: all .15s; }
.fcat-item:hover { border-color: rgba(220,38,38,0.3); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }
.fcat-item .ic { display: flex; align-items: center; justify-content: center; height: 2.25rem; width: 2.25rem; flex-shrink: 0; border-radius: var(--radius); background: var(--primary-10); color: var(--primary); }
.fcat-item .ic svg { width: 1.125rem; height: 1.125rem; }
.fcat-item .name { font-size: 0.875rem; font-weight: 600; }
.fcat-item .desc { margin-top: 0.125rem; font-size: 0.75rem; color: var(--muted); line-height: 1.5; }

/* gradient helpers */
.g-red { background: linear-gradient(135deg, #ef4444, #dc2626); }
.g-orange-red { background: linear-gradient(135deg, #f97316, #ef4444); }
.g-rose-red { background: linear-gradient(135deg, #f43f5e, #dc2626); }
.g-red-orange { background: linear-gradient(135deg, #ef4444, #f97316); }
.g-amber-red { background: linear-gradient(135deg, #f59e0b, #ef4444); }

/* ===== Use cases grid ===== */
.uc-grid { margin-top: 2.5rem; display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .uc-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .uc-grid { grid-template-columns: repeat(4, 1fr); } }
.uc-card { position: relative; overflow: hidden; border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.5rem; transition: all .2s; }
.uc-card:hover { transform: translateY(-4px); border-color: rgba(220,38,38,0.3); box-shadow: 0 20px 25px -5px rgba(220,38,38,0.05); }
.uc-card .blob { position: absolute; top: -2rem; right: -2rem; height: 6rem; width: 6rem; border-radius: 50%; opacity: 0.1; filter: blur(32px); }
.uc-card .ic { display: flex; align-items: center; justify-content: center; height: 3rem; width: 3rem; border-radius: var(--radius); color: #fff; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); position: relative; }
.uc-card .ic svg { width: 1.5rem; height: 1.5rem; }
.uc-card h3 { margin-top: 1rem; font-size: 1.125rem; font-weight: 700; }
.uc-card .desc { margin-top: 0.5rem; font-size: 0.875rem; color: var(--muted); line-height: 1.6; }
.uc-card ul { margin-top: 1rem; display: flex; flex-direction: column; gap: 0.375rem; }
.uc-card li { display: flex; align-items: center; gap: 0.5rem; font-size: 0.75rem; color: var(--muted-2); }
.uc-card li svg { width: 0.875rem; height: 0.875rem; color: var(--primary); flex-shrink: 0; }
.bg-red-500 { background: #ef4444; }
.bg-orange-500 { background: #f97316; }
.bg-rose-500 { background: #f43f5e; }
.bg-amber-500 { background: #f59e0b; }
.bg-red-600 { background: #dc2626; }
.bg-orange-600 { background: #ea580c; }
.bg-amber-600 { background: #d97706; }

/* ===== Reviews ===== */
.rev-stats { margin: 2.5rem auto 0; max-width: 48rem; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (min-width: 640px) { .rev-stats { grid-template-columns: repeat(4, 1fr); } }
.rev-stat { border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.25rem; text-align: center; }
.rev-stat .val { font-size: 1.875rem; font-weight: 700; }
.rev-stat .lbl { margin-top: 0.25rem; font-size: 0.75rem; color: var(--muted); }
.rev-grid { margin-top: 3rem; display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 768px) { .rev-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .rev-grid { grid-template-columns: 1fr 1fr 1fr; } }
.rev-card { position: relative; display: flex; flex-direction: column; border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.5rem; transition: all .15s; }
.rev-card:hover { border-color: rgba(220,38,38,0.3); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05); }
.rev-card .quote { position: absolute; right: 1.25rem; top: 1.25rem; width: 2rem; height: 2rem; color: rgba(220,38,38,0.1); }
.rev-stars { display: flex; align-items: center; gap: 0.25rem; color: var(--primary); }
.rev-stars svg { width: 1rem; height: 1rem; fill: currentColor; }
.rev-card .content { margin-top: 1rem; flex: 1; font-size: 0.875rem; line-height: 1.7; color: var(--muted-2); }
.rev-card .who { margin-top: 1.25rem; display: flex; align-items: center; gap: 0.75rem; border-top: 1px solid var(--border); padding-top: 1rem; }
.rev-card .avatar { display: flex; align-items: center; justify-content: center; height: 2.5rem; width: 2.5rem; border-radius: 50%; color: #fff; font-size: 0.875rem; font-weight: 600; }
.rev-card .who .name { font-size: 0.875rem; font-weight: 600; }
.rev-card .who .meta { font-size: 0.75rem; color: var(--muted); }

/* ===== Download section ===== */
.dl-sub { margin-top: 0.25rem; font-size: 0.875rem; color: var(--muted); }
.dl-desktop { margin-top: 1.25rem; display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .dl-desktop { grid-template-columns: 1fr 1fr; } }
.dl-card { display: flex; flex-direction: column; border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.5rem; transition: all .2s; gap: 1rem; }
@media (min-width: 640px) { .dl-card { flex-direction: row; align-items: center; justify-content: space-between; } }
.dl-card:hover { border-color: rgba(220,38,38,0.3); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05); }
.dl-card .info { display: flex; align-items: center; gap: 1rem; }
.dl-card .ic { display: flex; align-items: center; justify-content: center; height: 3.5rem; width: 3.5rem; border-radius: var(--radius-2xl); color: #fff; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); }
.dl-card .ic svg { width: 1.75rem; height: 1.75rem; }
.dl-card .os { display: flex; align-items: center; gap: 0.5rem; }
.dl-card .os .name { font-size: 1rem; font-weight: 700; }
.dl-card .ver { display: inline-block; padding: 0.125rem 0.5rem; border-radius: 9999px; background: var(--secondary); font-size: 11px; font-weight: 500; color: var(--muted-2); }
.dl-card .req { margin-top: 0.25rem; font-size: 0.75rem; color: var(--muted); }
.dl-card .size { margin-top: 0.25rem; font-size: 0.75rem; color: var(--muted-2); font-weight: 500; }

.dl-server { margin-top: 3.5rem; }
.dl-server-grid { margin-top: 1.25rem; display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 1024px) { .dl-server-grid { grid-template-columns: 1fr 1fr; } }
.dl-server-card { display: flex; flex-direction: column; border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.5rem; }
.dl-server-card .head { display: flex; align-items: center; gap: 0.75rem; }
.dl-server-card .ic { display: flex; align-items: center; justify-content: center; height: 2.75rem; width: 2.75rem; border-radius: var(--radius); background: var(--primary-10); color: var(--primary); }
.dl-server-card .ic svg { width: 1.25rem; height: 1.25rem; }
.dl-server-card .title { font-size: 1rem; font-weight: 700; }
.dl-server-card .badge { display: inline-block; padding: 0.125rem 0.5rem; border-radius: 9999px; background: var(--primary-10); color: var(--primary); font-size: 11px; font-weight: 500; }
.dl-server-card .desc { margin-top: 0.75rem; font-size: 0.875rem; color: var(--muted); line-height: 1.6; }
.dl-server-card pre { margin-top: 1rem; overflow-x: auto; border-radius: var(--radius); background: #18181b; padding: 1rem; font-size: 0.75rem; line-height: 1.7; color: #f4f4f5; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
.dl-server-card .points { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.375rem 1rem; }
.dl-server-card .points li { display: flex; align-items: center; gap: 0.375rem; font-size: 0.75rem; color: var(--muted-2); }
.dl-server-card .points svg { width: 0.875rem; height: 0.875rem; color: var(--primary); }

.dl-reqs { margin-top: 3.5rem; border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.5rem; }
@media (min-width: 640px) { .dl-reqs { padding: 2rem; } }
.dl-reqs h3 { font-size: 1.125rem; font-weight: 700; }
.dl-reqs .sub { margin-top: 0.25rem; font-size: 0.875rem; color: var(--muted); }
.dl-reqs-grid { margin-top: 1.5rem; display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .dl-reqs-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .dl-reqs-grid { grid-template-columns: 1fr 1fr 1fr; } }
.dl-req { display: flex; align-items: center; gap: 0.75rem; border: 1px solid var(--border); background: #fff; border-radius: var(--radius); padding: 1rem; }
.dl-req .ic { display: flex; align-items: center; justify-content: center; height: 2.5rem; width: 2.5rem; flex-shrink: 0; border-radius: var(--radius); background: var(--primary-10); color: var(--primary); }
.dl-req .ic svg { width: 1.25rem; height: 1.25rem; }
.dl-req .lbl { font-size: 0.75rem; color: var(--muted); }
.dl-req .val { font-size: 0.875rem; font-weight: 600; }

/* download preview CTA strip */
.dl-cta { margin-top: 2rem; display: flex; flex-direction: column; align-items: center; gap: 0.75rem; border: 1px solid rgba(220,38,38,0.2); background: var(--primary-50); border-radius: var(--radius-2xl); padding: 1.5rem; }
@media (min-width: 640px) { .dl-cta { flex-direction: row; justify-content: center; } }
.dl-cta p { font-size: 0.875rem; color: var(--muted-2); }
.dl-trust { margin-top: 1.5rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 0.5rem 1.5rem; font-size: 0.75rem; color: var(--muted); }
.dl-trust span { display: inline-flex; align-items: center; gap: 0.375rem; }
.dl-trust svg { width: 0.875rem; height: 0.875rem; color: var(--primary); }

/* download options 3-col (preview) */
.dl-opt-grid { margin-top: 2.5rem; display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .dl-opt-grid { grid-template-columns: 1fr 1fr 1fr; } }
.dl-opt { display: flex; flex-direction: column; align-items: center; border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.5rem; text-align: center; transition: all .2s; }
.dl-opt:hover { border-color: rgba(220,38,38,0.3); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05); }
.dl-opt .ic { display: flex; align-items: center; justify-content: center; height: 3.5rem; width: 3.5rem; border-radius: var(--radius-2xl); color: #fff; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); }
.dl-opt .ic svg { width: 1.75rem; height: 1.75rem; }
.dl-opt h3 { margin-top: 1rem; font-size: 1rem; font-weight: 700; }
.dl-opt p { margin-top: 0.25rem; font-size: 0.875rem; color: var(--muted); }

/* ===== About ===== */
.about-grid { display: grid; gap: 3rem; align-items: center; grid-template-columns: 1fr; }
@media (min-width: 1024px) { .about-grid { grid-template-columns: 1fr 1fr; } }
.about-text h2 { font-size: 1.875rem; font-weight: 700; }
@media (min-width: 640px) { .about-text h2 { font-size: 2.25rem; } }
.about-text p { margin-top: 1.25rem; font-size: 1rem; color: var(--muted); line-height: 1.7; }
.about-tags { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }
.about-tag { display: inline-flex; align-items: center; gap: 0.5rem; border-radius: var(--radius); background: var(--secondary); padding: 0.5rem 0.75rem; font-size: 0.875rem; }
.about-tag svg { width: 1rem; height: 1rem; color: var(--primary); }
.about-tag .t { font-weight: 500; }
.adv-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .adv-grid { grid-template-columns: 1fr 1fr; } }
.adv-card { border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.25rem; transition: all .15s; }
.adv-card:hover { border-color: rgba(220,38,38,0.3); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }
.adv-card .ic { display: flex; align-items: center; justify-content: center; height: 2.75rem; width: 2.75rem; border-radius: var(--radius); background: var(--primary-10); color: var(--primary); }
.adv-card .ic svg { width: 1.25rem; height: 1.25rem; }
.adv-card h3 { margin-top: 0.75rem; font-size: 1rem; font-weight: 700; }
.adv-card p { margin-top: 0.375rem; font-size: 0.875rem; color: var(--muted); line-height: 1.6; }

/* FAQ */
.faq-wrap { margin-top: 5rem; }
.faq-list { max-width: 48rem; margin: 2.5rem auto 0; }
.faq-item { border: 1px solid var(--border); background: #fff; border-radius: var(--radius); margin-bottom: 0.75rem; transition: all .15s; }
.faq-item.open { border-color: rgba(220,38,38,0.3); box-shadow: 0 1px 2px rgba(0,0,0,0.03); }
.faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.25rem; text-align: left; font-size: 1rem; font-weight: 600; color: var(--fg); }
.faq-q svg{width: 24px;}
.faq-q .chev { width: 1.25rem; height: 1.25rem; color: var(--muted); flex-shrink: 0; transition: transform .2s; }
.faq-item.open .faq-q .chev { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; }
.faq-a-inner { padding: 0 1.25rem 1.25rem; font-size: 0.875rem; color: var(--muted); line-height: 1.7; }

/* ===== CTA banner ===== */
.cta-section .container { padding-top: 4rem; padding-bottom: 4rem; }
@media (min-width: 640px) { .cta-section .container { padding-top: 5rem; padding-bottom: 5rem; } }
@media (min-width: 1024px) { .cta-section .container { padding-top: 7rem; padding-bottom: 7rem; } }
.cta-banner { position: relative; overflow: hidden; border-radius: var(--radius-3xl); background: linear-gradient(135deg, var(--primary), var(--primary-700)); padding: 2rem 1.5rem; }
@media (min-width: 640px) { .cta-banner { padding: 3.5rem 3rem; } }
@media (min-width: 1024px) { .cta-banner { padding: 5rem 3rem; } }
.cta-banner .grid-bg { position: absolute; inset: 0; opacity: 0.15; }
.cta-banner .blob1 { position: absolute; top: -5rem; right: -5rem; height: 18rem; width: 18rem; border-radius: 50%; background: rgba(255,255,255,0.1); filter: blur(64px); }
.cta-banner .blob2 { position: absolute; bottom: -6rem; left: -4rem; height: 18rem; width: 18rem; border-radius: 50%; background: rgba(253,186,116,0.2); filter: blur(64px); }
.cta-banner .inner { position: relative; max-width: 48rem; margin: 0 auto; text-align: center; }
.cta-pill { display: inline-flex; align-items: center; gap: 0.5rem; margin-bottom: 1.25rem; padding: 0.375rem 1rem; border-radius: 9999px; background: rgba(255,255,255,0.15); color: #fff; font-size: 0.875rem; font-weight: 500; backdrop-filter: blur(4px); }
.cta-pill svg { width: 1rem; height: 1rem; fill: currentColor; }
.cta-banner h2 { color: #fff; font-size: 1.875rem; font-weight: 700; letter-spacing: -0.02em; }
@media (min-width: 640px) { .cta-banner h2 { font-size: 2.25rem; } }
@media (min-width: 1024px) { .cta-banner h2 { font-size: 3rem; } }
.cta-banner p { margin: 1.25rem auto 0; max-width: 42rem; color: rgba(255,255,255,0.85); font-size: 1rem; line-height: 1.7; }
@media (min-width: 640px) { .cta-banner p { font-size: 1.125rem; } }
.cta-actions { margin-top: 2rem; display: flex; flex-direction: column; align-items: center; gap: 0.75rem; }
@media (min-width: 640px) { .cta-actions { flex-direction: row; justify-content: center; } }
.cta-actions .btn { width: 100%; }
@media (min-width: 640px) { .cta-actions .btn { width: auto; } }
.cta-note { margin-top: 1.25rem; font-size: 0.75rem; color: rgba(255,255,255,0.7); }

/* ===== Footer ===== */
.site-footer { margin-top: auto; border-top: 1px solid var(--border); background: rgba(246,245,244,0.4); }
.site-footer .container { padding-top: 3rem; padding-bottom: 3rem; }
.footer-grid { display: grid; gap: 2rem; grid-template-columns: 1fr 1fr; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer-brand .logo-link { margin-bottom: 1rem; }
.footer-brand p { max-width: 24rem; font-size: 0.875rem; color: var(--muted); line-height: 1.7; }
.footer-social { margin-top: 1.25rem; display: flex; gap: 0.5rem; }
.footer-social a { display: flex; align-items: center; justify-content: center; height: 2.25rem; width: 2.25rem; border-radius: var(--radius); border: 1px solid var(--border); background: #fff; color: var(--muted); transition: all .15s; }
.footer-social a:hover { border-color: rgba(220,38,38,0.4); color: var(--primary); }
.footer-social svg { width: 1rem; height: 1rem; }
.footer-col h3 { font-size: 0.875rem; font-weight: 600; }
.footer-col ul { margin-top: 1rem; display: flex; flex-direction: column; gap: 0.625rem; }
.footer-col a { font-size: 0.875rem; color: var(--muted); transition: color .15s; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { margin-top: 2.5rem; border-top: 1px solid var(--border); padding-top: 1.5rem; display: flex; flex-direction: column; align-items: flex-start; gap: 1rem; }
@media (min-width: 640px) { .footer-bottom { flex-direction: row; align-items: center; justify-content: space-between; } }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; font-size: 0.75rem; color: var(--muted); }
.footer-meta .dot { display: none; }
@media (min-width: 640px) { .footer-meta .dot { display: inline; } }
.footer-license { display: flex; align-items: center; gap: 0.375rem; font-size: 0.75rem; color: var(--muted); }
.footer-license svg { width: 0.875rem; height: 0.875rem; color: var(--primary); }

/* ===== Download Dialog ===== */
.dialog-overlay { position: fixed; inset: 0; z-index: 100; display: none; align-items: center; justify-content: center; padding: 1rem; background: rgba(0,0,0,0.5); }
.dialog-overlay.open { display: flex; }
.dialog { position: relative; width: 100%; max-width: 42rem; background: #fff; border-radius: var(--radius-2xl); overflow: hidden; box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25); }
.dialog-head { position: relative; background: linear-gradient(135deg, var(--primary), var(--primary-700)); padding: 1.75rem; color: #fff; }
@media (min-width: 640px) { .dialog-head { padding: 2rem; } }
.dialog-head .grid-bg { position: absolute; inset: 0; opacity: 0.2; }
.dialog-head .head-inner { position: relative; display: flex; align-items: center; gap: 0.75rem; }
.dialog-head .ic { display: flex; align-items: center; justify-content: center; height: 2.75rem; width: 2.75rem; border-radius: var(--radius); background: rgba(255,255,255,0.2); backdrop-filter: blur(4px); }
.dialog-head .ic svg { width: 1.5rem; height: 1.5rem; }
.dialog-head .title { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em; }
.dialog-head .desc { margin-top: 0.125rem; font-size: 0.875rem; color: rgba(255,255,255,0.8); }
.dialog-close { position: absolute; top: 1rem; right: 1rem; height: 2.25rem; width: 2.25rem; display: flex; align-items: center; justify-content: center; border-radius: var(--radius); color: #fff; background: rgba(255,255,255,0.15); transition: background .15s; }
.dialog-close:hover { background: rgba(255,255,255,0.25); }
.dialog-close svg { width: 1.25rem; height: 1.25rem; }
.dialog-body { padding: 1.5rem; }
@media (min-width: 640px) { .dialog-body { padding: 2rem; } }
.qr-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .qr-grid { grid-template-columns: 1fr 1fr; } }
.qr-card { display: flex; flex-direction: column; align-items: center; border-radius: var(--radius-2xl); border: 1px solid var(--border); background: #fff; padding: 1.25rem; text-align: center; transition: all .15s; }
.qr-card:hover { border-color: rgba(220,38,38,0.4); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }
.qr-card .label { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; }
.qr-card .label svg { width: 1.25rem; height: 1.25rem; color: var(--primary); }
.qr-card .label .name { font-size: 0.875rem; font-weight: 600; }
.qr-card .label .ver { padding: 0.125rem 0.5rem; border-radius: 9999px; background: var(--secondary); font-size: 11px; font-weight: 500; color: var(--muted-2); }
.qr-box { border: 2px solid var(--border); border-radius: var(--radius); background: #fff; padding: 0.75rem; transition: border-color .15s; }
.qr-card:hover .qr-box { border-color: rgba(220,38,38,0.3); }
.qr-box img { width: 150px; height: 150px; }
.qr-card .req { margin-top: 0.75rem; font-size: 0.75rem; color: var(--muted); }
.qr-card .size { margin-top: 0.25rem; font-size: 0.75rem; color: var(--muted-2); font-weight: 500; }
.dialog-tip { margin-top: 1.25rem; display: flex; align-items: flex-start; gap: 0.625rem; border-radius: var(--radius); background: rgba(246,245,244,0.6); padding: 0.875rem; font-size: 0.875rem; color: var(--muted); }
.dialog-tip svg { margin-top: 0.125rem; width: 1rem; height: 1rem; flex-shrink: 0; color: var(--primary); }
.dialog-tip .key { font-weight: 500; color: var(--fg); }
.dialog-tip .em { font-weight: 500; color: var(--primary); }

/* section bg variants */
.bg-white { background: #fff; }
.bg-tint { background: linear-gradient(to bottom, #fff, rgba(254,242,242,0.4)); }
.bg-tint-rev { background: linear-gradient(to bottom, rgba(254,242,242,0.4), #fff); }

/* hidden helpers */
.hidden { display: none; }
@media (min-width: 640px) { .sm-block { display: block; } }


@media (max-width: 750px) { 
	.hero-cta .btn svg{width: 24px;}
	.mobile-menu-foot .btn-block svg{width: 24px;}
}