:root {
  font-family: "Segoe UI", "Microsoft YaHei UI", "PingFang SC", sans-serif;
  color: #17211b;
  background: #f4f6f5;
  font-synthesis: none;
  letter-spacing: 0;
  --green: #129650;
  --green-dark: #08753b;
  --ink: #17211b;
  --muted: #6d7a72;
  --line: #dce4df;
  --surface: #fff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: #f4f6f5; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.site-header {
  position: fixed; z-index: 20; top: 0; left: 0; right: 0; height: 72px; padding: 0 max(24px, calc((100vw - 1240px) / 2));
  display: flex; align-items: center; gap: 36px; color: #fff; background: rgba(18, 27, 22, .94);
  border-bottom: 1px solid rgba(255,255,255,.1); backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 7px; overflow: hidden; background: #ffd400; }
.brand-mark img { width: 100%; height: 100%; object-fit: cover; display: block; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 16px; }
.brand small { margin-top: 2px; color: #9fb0a7; font-size: 9px; }
.site-header nav { display: flex; gap: 28px; margin-left: auto; }
.site-header nav a { color: #c9d3cd; font-size: 12px; }
.site-header nav a:hover { color: #fff; }
.header-action { height: 34px; padding: 0 13px; display: inline-flex; align-items: center; gap: 8px; border: 1px solid rgba(255,255,255,.28); border-radius: 5px; font-size: 11px; }

.hero {
  position: relative; min-height: min(760px, calc(100vh - 24px)); padding: 132px max(24px, calc((100vw - 1240px) / 2)) 80px;
  overflow: hidden; display: flex; align-items: center; background: #e9eeeb url("/assets/desktop-dashboard.png") center/cover no-repeat;
}
.hero-backdrop { position: absolute; inset: 0; background: rgba(236, 241, 238, .87); }
.hero-content { position: relative; z-index: 1; width: min(680px, 100%); }
.eyebrow, .section-heading > p, .final-cta p { margin: 0 0 14px; color: var(--green-dark); font-size: 12px; font-weight: 700; }
.hero h1 { margin: 0; font-size: clamp(54px, 8vw, 96px); line-height: 1; font-weight: 800; }
.hero-copy { max-width: 640px; margin: 28px 0 0; color: #46544c; font-size: 18px; line-height: 1.85; }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 10px; }
.button { min-height: 46px; padding: 0 18px; border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; gap: 12px; font-size: 13px; font-weight: 700; }
.button.primary { color: #fff; background: var(--green); }
.button.primary:hover { background: var(--green-dark); }
.button.secondary { border: 1px solid #aebbb3; background: rgba(255,255,255,.72); }
.hero-facts { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 24px; color: #5f6c64; font-size: 11px; }
.hero-facts span { display: flex; gap: 6px; }
.hero-facts b { color: #1d2a22; }

.band { padding: 90px 24px; }
.section-inner { width: min(1160px, 100%); margin: 0 auto; }
.section-heading { max-width: 760px; margin-bottom: 42px; }
.section-heading.compact { margin-bottom: 32px; }
.section-heading h2 { margin: 0; font-size: clamp(30px, 4vw, 48px); line-height: 1.25; }
.section-heading > span { display: block; margin-top: 16px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.product-overview { background: #fff; }
.workflow { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.workflow article { min-height: 210px; padding: 28px 26px; border-right: 1px solid var(--line); }
.workflow article:last-child { border-right: 0; }
.workflow b { color: var(--green); font-size: 12px; }
.workflow h3 { margin: 28px 0 10px; font-size: 18px; }
.workflow p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
.product-shot { margin: 64px 0 0; }
.product-shot img { display: block; width: 100%; border: 1px solid #cfd9d3; box-shadow: 0 22px 60px rgba(26, 49, 35, .13); }
.product-shot figcaption { margin-top: 12px; color: #7c8981; font-size: 10px; text-align: right; }

.notifications { background: #eef2f0; }
.channel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.channel-grid article { min-height: 174px; padding: 24px; display: flex; align-items: flex-start; gap: 16px; background: #fff; border: 1px solid var(--line); border-radius: 7px; }
.channel-icon { width: 42px; height: 42px; flex: none; display: grid; place-items: center; color: #fff; border-radius: 7px; font-weight: 800; }
.channel-icon.ding { background: #2088ee; }
.channel-icon.feishu { background: #3056d3; }
.channel-icon.wecom { background: #19a75c; }
.channel-grid h3 { margin: 2px 0 10px; font-size: 17px; }
.channel-grid p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
.notice-strip { margin-top: 12px; min-height: 70px; padding: 18px 22px; display: flex; align-items: center; gap: 24px; color: #dbe8e0; background: #17211b; border-radius: 7px; }
.notice-strip strong { color: #fff; white-space: nowrap; }
.notice-strip span { font-size: 12px; line-height: 1.7; }

.plans { background: #fff; }
.plan-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.plan-card { padding: 30px; border: 1px solid var(--line); border-radius: 7px; }
.plan-card.featured { border-top: 4px solid var(--green); }
.plan-title { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.plan-title h3 { margin: 0; font-size: 22px; }
.plan-title span { color: #4c6b58; background: #e8f5ec; padding: 5px 8px; border-radius: 4px; font-size: 10px; }
.plan-price { display: block; margin: 28px 0; font-size: 38px; }
.plan-price small { color: var(--muted); font-size: 11px; font-weight: 400; }
.plan-prices { margin: 22px 0; display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.plan-prices span { padding: 10px 8px; border-right: 1px solid var(--border); display: grid; gap: 5px; text-align: center; }
.plan-prices span:last-child { border-right: 0; }
.plan-prices b { color: var(--muted); font-size: 10px; font-weight: 500; }
.plan-prices strong { font-size: 18px; }
.plan-card ul { margin: 0; padding: 0; list-style: none; }
.plan-card li { min-height: 44px; display: flex; align-items: center; gap: 5px; border-bottom: 1px solid #edf1ee; color: #526158; font-size: 12px; }
.plan-card li::before { content: "✓"; margin-right: 7px; color: var(--green); font-weight: 800; }
.plan-card li b { color: #1c2921; }

.final-cta { padding: 54px max(24px, calc((100vw - 1160px) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 28px; color: #fff; background: #17211b; }
.final-cta p { color: #68d293; }
.final-cta h2 { margin: 0 0 10px; font-size: 32px; }
.final-cta > div > span { color: #9eaea5; font-size: 11px; }
.final-cta > div:last-child { display: flex; flex-wrap: wrap; gap: 10px; }
.button.dark { color: #fff; border-color: #617068; background: transparent; }
footer { min-height: 86px; padding: 20px max(24px, calc((100vw - 1160px) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 24px; color: #738078; background: #f4f6f5; font-size: 10px; }
footer span { color: #27342c; font-weight: 700; }
footer p { margin: 0; text-align: right; }

@media (max-width: 820px) {
  .site-header { height: 64px; padding: 0 16px; }
  .site-header nav { display: none; }
  .header-action { margin-left: auto; }
  .hero { min-height: 710px; padding: 120px 20px 70px; background-position: 30% center; }
  .hero-copy { font-size: 15px; }
  .hero-facts { gap: 12px 20px; }
  .band { padding: 66px 16px; }
  .workflow { grid-template-columns: 1fr 1fr; }
  .workflow article:nth-child(2) { border-right: 0; }
  .workflow article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .channel-grid { grid-template-columns: 1fr; }
  .plan-grid { grid-template-columns: 1fr; }
  .final-cta { align-items: flex-start; flex-direction: column; padding: 44px 20px; }
}

@media (max-width: 480px) {
  .brand small { display: none; }
  .hero h1 { font-size: 56px; }
  .hero-actions .button { width: 100%; }
  .workflow { grid-template-columns: 1fr; }
  .workflow article { min-height: 170px; border-right: 0; border-bottom: 1px solid var(--line); }
  .workflow article:last-child { border-bottom: 0; }
  .notice-strip { align-items: flex-start; flex-direction: column; gap: 7px; }
  .plan-card { padding: 24px 20px; }
  .final-cta > div:last-child, .final-cta .button { width: 100%; }
  footer { align-items: flex-start; flex-direction: column; }
  footer p { text-align: left; line-height: 1.6; }
}