:root {
  --cream: #f7f0e4;
  --oat: #efe2cf;
  --leaf: #8a9b68;
  --deep-leaf: #65764c;
  --clay: #b9825f;
  --bark: #6d543f;
  --ink: #312b24;
  --muted: #756755;
  --white: #ffffff;
  --soft-white: rgba(255, 252, 245, 0.82);
  --shadow: 0 22px 50px rgba(95, 75, 52, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  background:
    linear-gradient(115deg, rgba(138, 155, 104, 0.08) 0 16%, transparent 16% 100%),
    repeating-linear-gradient(90deg, rgba(109, 84, 63, 0.035) 0 1px, transparent 1px 14px),
    var(--cream);
  line-height: 1.7;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 18px 7vw;
  background: rgba(247, 240, 228, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(109, 84, 63, 0.14);
}

.logo {
  font-weight: 800;
  font-size: 20px;
  color: var(--bark);
}

.nav {
  display: flex;
  gap: 18px;
  font-size: 15px;
}

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

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

.hero {
  position: relative;
  min-height: 78vh;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  align-items: center;
  gap: 44px;
  padding: 70px 7vw 80px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 86% 18%, rgba(138, 155, 104, 0.2), transparent 34%),
    linear-gradient(135deg, #f7f0e4 0%, #ead9c2 52%, #f6ead9 100%);
}

.hero::before {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -140px;
  width: 390px;
  height: 330px;
  border-radius: 48% 52% 40% 60% / 58% 36% 64% 42%;
  background: rgba(138, 155, 104, 0.22);
}

.hero::after {
  content: "";
  position: absolute;
  left: -130px;
  top: 120px;
  width: 280px;
  height: 220px;
  border-radius: 62% 38% 52% 48% / 44% 56% 38% 62%;
  background: rgba(185, 130, 95, 0.18);
}

.hero-text,
.hero-card {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-label {
  margin: 0 0 10px;
  color: var(--deep-leaf);
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.hero-copy {
  max-width: 650px;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.primary-btn,
.secondary-btn,
.line-btn,
.install-btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 800;
  border: 0;
  cursor: pointer;
}

.primary-btn,
.line-btn {
  color: var(--white);
  background: linear-gradient(135deg, var(--deep-leaf), var(--leaf));
  box-shadow: var(--shadow);
}

.secondary-btn {
  color: var(--bark);
  background: rgba(255, 252, 245, 0.9);
  border: 1px solid rgba(109, 84, 63, 0.18);
}

.hero-card {
  min-height: 380px;
  padding: 34px;
  border-radius: 34px 58px 32px 54px;
  background:
    linear-gradient(150deg, rgba(255, 252, 245, 0.92), rgba(239, 226, 207, 0.72)),
    repeating-linear-gradient(45deg, rgba(109, 84, 63, 0.035) 0 1px, transparent 1px 12px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.blob-art {
  position: relative;
  height: 210px;
  margin-bottom: 24px;
}

.blob-art span {
  position: absolute;
  display: block;
}

.blob-art span:nth-child(1) {
  width: 170px;
  height: 170px;
  left: 18px;
  top: 12px;
  border-radius: 58% 42% 65% 35% / 44% 58% 42% 56%;
  background: linear-gradient(145deg, #d8c19f, var(--clay));
}

.blob-art span:nth-child(2) {
  width: 124px;
  height: 124px;
  right: 24px;
  top: 58px;
  border-radius: 48% 52% 38% 62% / 60% 35% 65% 40%;
  background: linear-gradient(145deg, #aeb889, var(--leaf));
}

.blob-art span:nth-child(3) {
  width: 88px;
  height: 88px;
  left: 42%;
  bottom: 0;
  border-radius: 60% 40% 50% 50% / 42% 58% 36% 64%;
  background: #ead5b6;
}

.hero-card p {
  color: var(--deep-leaf);
  font-weight: 800;
}

.hero-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 34px;
}

.hero-card small {
  color: var(--muted);
  font-size: 15px;
}

.section {
  padding: 76px 7vw;
}

.about {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 36px;
  background:
    linear-gradient(110deg, rgba(255, 252, 245, 0.96), rgba(234, 217, 194, 0.7));
}

.about p:last-child {
  color: var(--muted);
  font-size: 19px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

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

.card {
  min-height: 230px;
  padding: 28px;
  border-radius: 28px 42px 26px 38px;
  background:
    linear-gradient(150deg, rgba(255, 252, 245, 0.96), rgba(239, 226, 207, 0.78));
  box-shadow: 0 14px 34px rgba(95, 75, 52, 0.1);
}

.card-number {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--clay);
  font-weight: 900;
}

.card p,
.contact p {
  color: var(--muted);
}

.steps {
  background:
    linear-gradient(135deg, rgba(138, 155, 104, 0.16), rgba(239, 226, 207, 0.76));
}

.step-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.step-list li {
  position: relative;
  min-height: 150px;
  padding: 54px 24px 24px;
  border-radius: 24px 34px 26px 38px;
  background: var(--soft-white);
  color: var(--muted);
}

.step-list li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 20px;
  left: 24px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--leaf);
  font-weight: 800;
}

.contact {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
  margin: 76px 7vw;
  padding: 46px;
  border-radius: 36px 58px 34px 46px;
  background:
    linear-gradient(145deg, rgba(255, 252, 245, 0.96), rgba(234, 217, 194, 0.82));
  box-shadow: var(--shadow);
}

.line-btn {
  white-space: nowrap;
}

.install-btn {
  position: fixed;
  right: 18px;
  bottom: 18px;
  color: var(--white);
  background: var(--clay);
  box-shadow: var(--shadow);
}

@media (max-width: 860px) {
  .topbar,
  .hero,
  .about,
  .contact {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .cards,
  .step-list {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 46px;
  }

  .contact {
    margin: 50px 7vw;
    padding: 32px;
  }
}

@media (max-width: 520px) {
  .topbar {
    padding: 14px 5vw;
  }

  .nav {
    gap: 10px;
    font-size: 14px;
  }

  .hero,
  .section {
    padding-left: 5vw;
    padding-right: 5vw;
  }

  h1 {
    font-size: 42px;
  }

  .hero-card {
    min-height: 320px;
    padding: 24px;
  }

  .hero-actions,
  .primary-btn,
  .secondary-btn,
  .line-btn {
    width: 100%;
  }
}