:root {
  --bg: #f5efe3;
  --bg-soft: #fbf8f1;
  --paper: rgba(255, 250, 241, 0.78);
  --panel: #fffaf0;
  --text: #1f261f;
  --muted: #566154;
  --line: rgba(74, 88, 68, 0.14);
  --brand: #335c43;
  --brand-strong: #274734;
  --accent: #b88a4a;
  --accent-soft: #e8d8b6;
  --shadow: 0 24px 60px rgba(40, 48, 37, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --container: min(1120px, calc(100vw - 32px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(184, 138, 74, 0.18), transparent 28%),
    radial-gradient(circle at 85% 10%, rgba(71, 102, 78, 0.18), transparent 24%),
    linear-gradient(180deg, #f8f4ec 0%, #f3ecd9 100%);
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

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

button {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(184, 138, 74, 0.36);
  outline-offset: 3px;
}

.page-shell {
  min-height: 100vh;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.section {
  padding: 88px 0;
}

.section-soft {
  background: rgba(255, 252, 246, 0.72);
  backdrop-filter: blur(8px);
}

.section-accent {
  background:
    linear-gradient(135deg, rgba(51, 92, 67, 0.94), rgba(29, 52, 39, 0.96)),
    linear-gradient(180deg, #203426, #3a5d45);
  color: #f7f0e3;
}

.section-accent .eyebrow {
  background: rgba(255, 255, 255, 0.08);
  color: #f5e7c9;
}

.section-accent .section-heading p,
.section-accent .section-heading .eyebrow {
  color: rgba(247, 240, 227, 0.8);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 14px 0;
  backdrop-filter: blur(18px);
  background: rgba(248, 244, 236, 0.75);
  border-bottom: 1px solid rgba(58, 73, 55, 0.08);
}

.header-inner,
.footer-inner,
.hero-grid,
.guide-grid,
.faq-grid,
.cta-box,
.trust-shell,
.trust-grid,
.benefit-grid,
.product-grid,
.usage-grid {
  display: grid;
}

.header-inner {
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--brand) 0%, #5f7a64 100%);
  color: #f9f3e7;
  font-family: "Noto Serif SC", "STSong", serif;
  font-size: 1.4rem;
  box-shadow: var(--shadow);
}

.brand-copy {
  display: grid;
}

.brand-copy strong {
  font-size: 1rem;
}

.brand-copy small,
.main-nav a,
.hero-text,
.section-heading p,
.benefit-card p,
.product-body p,
.guide-item p,
.usage-card p,
.timeline-item p,
.faq-item p,
.cta-box p,
.site-footer p {
  color: var(--muted);
}

.main-nav {
  display: inline-flex;
  justify-content: center;
  gap: 28px;
}

.main-nav a {
  position: relative;
  padding-bottom: 4px;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--accent), transparent);
  transition: transform 180ms ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.btn {
  border: 0;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  cursor: pointer;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.btn:hover,
.btn:focus-visible,
.floating-wechat:hover,
.floating-wechat:focus-visible,
.footer-copy:hover,
.footer-copy:focus-visible {
  transform: translateY(-2px);
}

.btn-primary,
.floating-wechat {
  background: linear-gradient(135deg, var(--brand) 0%, #43694d 100%);
  color: #f9f5ea;
  box-shadow: 0 18px 36px rgba(47, 78, 58, 0.24);
}

.btn-secondary,
.footer-copy {
  color: var(--brand-strong);
  background: rgba(255, 250, 241, 0.75);
  border: 1px solid rgba(51, 92, 67, 0.18);
}

.btn-large {
  min-height: 56px;
  padding: 0 28px;
}

.hero {
  padding-top: 48px;
}

.hero-grid {
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 44px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(184, 138, 74, 0.12);
  color: #6f532f;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.hero-copy h1,
.section-heading h2,
.cta-box h2 {
  margin: 16px 0 14px;
  font-family: "Noto Serif SC", "STSong", serif;
  line-height: 1.15;
  letter-spacing: 0.01em;
}

.hero-copy h1 {
  font-size: clamp(2.6rem, 5vw, 4.8rem);
}

.hero-text {
  font-size: 1.06rem;
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 250, 241, 0.72);
  border: 1px solid rgba(51, 92, 67, 0.12);
}

.hero-visual {
  position: relative;
}

.hero-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(180deg, #fbf5e7 0%, #edf2e8 100%);
  box-shadow: var(--shadow);
}

.hero-card-main img {
  width: 100%;
  aspect-ratio: 1 / 1.05;
  object-fit: cover;
}

.hero-card-copy {
  display: grid;
  gap: 6px;
  padding: 24px 26px 28px;
}

.hero-card-copy span,
.product-body ul,
.disclaimer,
.timeline-item span {
  color: var(--muted);
}

.hero-card-copy strong,
.benefit-card h3,
.product-body h3,
.guide-item h3,
.usage-card h3,
.timeline-item strong,
.faq-item summary {
  font-family: "Noto Serif SC", "STSong", serif;
}

.trust-strip {
  padding: 26px 0 30px;
}

.trust-shell {
  gap: 24px;
  padding: 0;
}

.trust-lead {
  max-width: 760px;
}

.trust-lead h2 {
  margin: 14px 0 10px;
  font-family: "Noto Serif SC", "STSong", serif;
  font-size: clamp(1.9rem, 3vw, 3rem);
  line-height: 1.18;
}

.trust-lead p {
  margin: 0;
  color: var(--muted);
}

.trust-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.trust-item,
.benefit-card,
.product-card,
.usage-card,
.timeline-item,
.faq-item,
.cta-box,
.guide-item {
  border: 1px solid var(--line);
  box-shadow: 0 14px 36px rgba(61, 70, 55, 0.07);
}

.trust-item,
.benefit-card,
.usage-card,
.timeline-item,
.faq-item {
  padding: 22px;
  border-radius: var(--radius-md);
  background: rgba(255, 250, 241, 0.84);
}

.trust-item {
  min-height: 156px;
  padding: 24px;
}

.trust-item strong {
  display: block;
  margin-bottom: 10px;
  font-family: "Noto Serif SC", "STSong", serif;
  font-size: 1.28rem;
}

.trust-item p {
  margin: 0;
  max-width: 24ch;
  font-size: 1rem;
}

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

.section-heading h2 {
  font-size: clamp(2rem, 3vw, 3.2rem);
}

.benefit-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.product-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  overflow: hidden;
  border-radius: 28px;
  background: rgba(255, 251, 244, 0.92);
}

.product-card img {
  width: 100%;
  aspect-ratio: 1.2 / 1;
  object-fit: cover;
  background: linear-gradient(180deg, #f5e9d2 0%, #e6eedf 100%);
}

.product-body {
  padding: 24px;
}

.product-body ul {
  margin: 18px 0 0;
  padding-left: 18px;
}

.guide-grid {
  grid-template-columns: 0.92fr 1.08fr;
  gap: 28px;
  align-items: start;
}

.guide-list {
  display: grid;
  gap: 14px;
}

.guide-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 22px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
}

.guide-item span {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.1);
  color: #f8edd8;
  font-family: "Noto Serif SC", "STSong", serif;
  font-size: 1.1rem;
}

.guide-item p {
  color: rgba(247, 240, 227, 0.76);
}

.usage-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.disclaimer {
  margin: 24px 0 0;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.faq-grid {
  gap: 16px;
}

.faq-item {
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 1.4rem;
  line-height: 1;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-item[open] summary {
  margin-bottom: 12px;
}

.cta-section {
  padding-bottom: 110px;
}

.cta-box {
  grid-template-columns: 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 36px;
  border-radius: 34px;
  background:
    radial-gradient(circle at top left, rgba(184, 138, 74, 0.24), transparent 28%),
    linear-gradient(135deg, rgba(255, 248, 236, 0.98), rgba(246, 239, 225, 0.98));
}

.cta-actions {
  display: grid;
  gap: 12px;
}

.site-footer {
  padding: 26px 0 84px;
  border-top: 1px solid rgba(62, 77, 58, 0.1);
}

.footer-inner {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.footer-copy {
  border-radius: 999px;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid rgba(51, 92, 67, 0.18);
  cursor: pointer;
}

.floating-wechat {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 30;
  border: 0;
  min-width: 128px;
  min-height: 54px;
  padding: 0 20px;
  border-radius: 999px;
  cursor: pointer;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 18px);
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(31, 38, 31, 0.92);
  color: #f6f0e5;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 220ms ease,
    transform 220ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 500ms ease,
    transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .header-inner,
  .hero-grid,
  .guide-grid,
  .cta-box,
  .benefit-grid,
  .product-grid,
  .usage-grid,
  .timeline {
    grid-template-columns: 1fr 1fr;
  }

  .main-nav {
    display: none;
  }

  .header-inner {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .hero-copy {
    grid-column: 1 / -1;
  }
}

@media (max-width: 780px) {
  .section {
    padding: 72px 0;
  }

  .site-header {
    padding: 10px 0;
  }

  .brand-copy small {
    display: none;
  }

  .header-inner,
  .hero-grid,
  .guide-grid,
  .cta-box,
  .trust-shell,
  .trust-grid,
  .benefit-grid,
  .product-grid,
  .usage-grid,
  .timeline,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .nav-cta {
    display: none;
  }

  .hero {
    padding-top: 28px;
  }

  .hero-copy h1 {
    font-size: clamp(2.2rem, 9vw, 3.5rem);
  }

  .hero-actions {
    grid-template-columns: 1fr;
  }

  .hero-actions,
  .cta-actions {
    display: grid;
  }

  .guide-item {
    grid-template-columns: 48px 1fr;
  }

  .cta-box {
    padding: 26px;
  }

  .floating-wechat {
    right: 14px;
    bottom: 14px;
    min-width: 110px;
    min-height: 50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}