/* Site 1 — Classic product landing, WhatsApp greens */
:root {
  --wa-dark: #075e54;
  --wa-teal: #128c7e;
  --wa-green: #25d366;
  --wa-bubble: #dcf8c6;
  --wa-sand: #ece5dd;
  --ink: #1a2b28;
  --muted: #4a5c58;
  --line: #d4ddd9;
  --card: #ffffff;
  --radius: 12px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #f4f7f6;
  line-height: 1.7;
  font-size: 16px;
}

img,
svg {
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.wrap {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(7, 94, 84, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--wa-dark);
  white-space: nowrap;
}

.brand svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px 16px;
}

.nav a {
  font-size: 14px;
  color: var(--muted);
}

.nav a:hover {
  color: var(--wa-teal);
}

/* Hero */
.hero {
  background:
    radial-gradient(circle at 18% 20%, rgba(37, 211, 102, 0.18), transparent 42%),
    linear-gradient(160deg, #075e54 0%, #128c7e 62%, #0a6b5f 100%);
  color: #fff;
  padding: 72px 0 64px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.28;
  font-weight: 750;
  max-width: 820px;
  margin: 0 auto 20px;
}

.hero-lead {
  max-width: 680px;
  margin: 0 auto 16px;
  font-size: 17px;
  color: rgba(255, 255, 255, 0.92);
}

.hero-lead + .hero-lead {
  margin-bottom: 28px;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  background: var(--wa-green);
  color: #06382f;
  font-weight: 700;
  border-radius: 999px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.16);
}

.cta:hover {
  filter: brightness(1.06);
}

.hero-minis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
  text-align: left;
}

.mini-card {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(220, 248, 198, 0.28);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  backdrop-filter: blur(6px);
}

.mini-card strong {
  display: block;
  font-size: 18px;
  margin-bottom: 6px;
}

.mini-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.88);
}

/* Sections */
section {
  padding: 72px 0;
}

.section-kicker {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--wa-teal);
  font-weight: 700;
  margin-bottom: 8px;
}

h2 {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.35;
  margin-bottom: 14px;
  color: var(--wa-dark);
}

.lead {
  color: var(--muted);
  max-width: 720px;
  margin-bottom: 28px;
}

.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.icon-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px 22px;
  border: 1px solid var(--line);
}

.icon-card .ico {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--wa-sand);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}

.icon-card .ico svg {
  width: 22px;
  height: 22px;
}

.icon-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.icon-card p,
.icon-card li {
  font-size: 14.5px;
  color: var(--muted);
}

.icon-card ul {
  padding-left: 18px;
}

/* Chat */
.chat-sec {
  background: #fff;
}

.chat-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: start;
}

.chat-list {
  display: grid;
  gap: 12px;
}

.chat-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 12px;
  background: var(--wa-sand);
  border-radius: var(--radius);
  padding: 14px;
}

.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--wa-teal);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.bubble {
  background: var(--wa-bubble);
  border-radius: 12px 12px 4px 12px;
  padding: 12px 14px;
  font-size: 14.5px;
}

/* Files */
.file-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.file-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--line);
}

.file-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.file-card p {
  color: var(--muted);
  font-size: 14.5px;
}

/* Security */
.security {
  background: var(--wa-dark);
  color: #e8f4f1;
}

.security h2 {
  color: #fff;
}

.security .lead {
  color: rgba(255, 255, 255, 0.78);
}

.sec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.sec-card {
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.sec-card h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.sec-card p {
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.8);
}

/* Browser pills */
.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.pill {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--wa-dark);
  font-weight: 600;
}

.browser-notes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.note {
  background: #fff;
  border-radius: var(--radius);
  padding: 18px 20px;
  border: 1px solid var(--line);
}

.note h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.note p {
  color: var(--muted);
  font-size: 14.5px;
}

/* Table */
.compare {
  background: #fff;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

th,
td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  background: var(--wa-dark);
  color: #fff;
  font-weight: 600;
}

tr:last-child td {
  border-bottom: 0;
}

td:first-child {
  font-weight: 600;
  white-space: nowrap;
}

.bounds {
  margin-top: 22px;
  background: var(--wa-sand);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.bounds h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.bounds ul {
  padding-left: 18px;
  color: var(--muted);
}

/* Steps bar */
.steps {
  background: linear-gradient(180deg, #f4f7f6, #e8f0ed);
}

.step-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 8px;
}

.step {
  position: relative;
  padding: 8px 18px 0 0;
}

.step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 22px;
  left: 48px;
  right: 8px;
  height: 3px;
  background: var(--wa-green);
  border-radius: 2px;
}

.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--wa-teal);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  position: relative;
  z-index: 1;
  margin-bottom: 14px;
}

.step h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.step p {
  font-size: 14px;
  color: var(--muted);
}

/* FAQ */
.faq {
  background: #fff;
}

.faq-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.faq-list dt {
  padding: 20px 0 6px;
  font-weight: 700;
  font-size: 16px;
}

.faq-list dd {
  padding: 0 0 20px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

/* Footer */
.site-footer {
  background: #04352f;
  color: #c9ddd8;
  padding: 36px 0 28px;
  font-size: 14px;
}

.site-footer p + p {
  margin-top: 10px;
}

/* Repeat CTA band */
.cta-band {
  text-align: center;
  margin-top: 28px;
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero-minis,
  .cards-3,
  .sec-grid,
  .chat-grid,
  .file-grid,
  .browser-notes,
  .step-bar {
    grid-template-columns: 1fr;
  }

  .step:not(:last-child)::after {
    display: none;
  }
}

.news { padding: 64px 0 24px; }
.news-list { list-style: none; display: grid; gap: 16px; }
.news-list li { background: #fff; border-radius: 12px; padding: 18px 20px; border: 1px solid var(--line); }
.news-list h3 { font-size: 17px; margin-bottom: 6px; color: var(--wa-dark); }
.news-list time { display: block; font-size: 13px; color: var(--muted); margin-bottom: 8px; }