:root {
  --bg: #f7f4ee;
  --surface: #ffffff;
  --surface-muted: #edf4f2;
  --text: #1e2522;
  --muted: #5f6d68;
  --line: #d7dfda;
  --accent: #116a65;
  --accent-strong: #0b4d49;
  --warm: #c87642;
  --shadow: 0 18px 45px rgba(22, 43, 39, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 64px);
  background: rgba(247, 244, 238, 0.92);
  border-bottom: 1px solid rgba(215, 223, 218, 0.8);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
}

.nav {
  display: flex;
  gap: clamp(14px, 3vw, 32px);
  color: var(--muted);
  font-size: 15px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: clamp(28px, 6vw, 80px);
  min-height: 74vh;
  align-items: center;
  padding: clamp(54px, 8vw, 96px) clamp(20px, 5vw, 64px) 48px;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--warm);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 680px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  max-width: 640px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  background: var(--accent);
  color: #fff;
}

.button.secondary {
  color: var(--accent-strong);
}

.hero-visual {
  min-height: 360px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, rgba(17, 106, 101, 0.92), rgba(200, 118, 66, 0.72)),
    linear-gradient(45deg, #dbe7e3 25%, transparent 25%),
    linear-gradient(-45deg, #dbe7e3 25%, transparent 25%);
  background-size: auto, 26px 26px, 26px 26px;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.visual-card {
  width: min(72%, 340px);
  aspect-ratio: 4 / 3;
  padding: 28px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 8px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
}

.visual-line {
  display: block;
  height: 12px;
  margin-bottom: 18px;
  background: var(--line);
  border-radius: 99px;
}

.visual-line.short {
  width: 42%;
  background: var(--warm);
}

.visual-line.medium {
  width: 68%;
}

.visual-dot {
  display: block;
  width: 58px;
  height: 58px;
  margin-top: 40px;
  background: var(--accent);
  border-radius: 50%;
}

.section {
  padding: 72px clamp(20px, 5vw, 64px);
}

.section.muted {
  background: var(--surface-muted);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  max-width: 980px;
  color: var(--muted);
  font-size: 17px;
}

.note-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.note-list article {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.note-list time {
  color: var(--warm);
  font-size: 14px;
  font-weight: 700;
}

.note-list h3 {
  margin: 8px 0;
  font-size: 21px;
}

.note-list p,
.contact-box p {
  margin: 0;
  color: var(--muted);
}

.contact-box {
  max-width: 620px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.contact-box a {
  display: inline-block;
  margin-top: 10px;
  color: var(--accent);
  font-weight: 700;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 26px clamp(20px, 5vw, 64px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--accent);
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-visual {
    min-height: 260px;
  }

  .content-grid,
  .note-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero-actions,
  .button {
    width: 100%;
  }
}