/* ============ 基础 ============ */
:root {
  --green-deep: #1c3a2e;
  --green-mid: #2e5543;
  --green-soft: #eef3ec;
  --gold: #c9a96a;
  --gold-deep: #a88448;
  --ink: #23302a;
  --muted: #6d7a72;
  --cream: #faf8f2;
  --white: #ffffff;
  --shadow: 0 20px 50px rgba(28, 58, 46, 0.12);
  --radius: 16px;
  --maxw: 1180px;
  --font-serif: "STKaiti", "KaiTi", "SimSun", serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background: var(--cream);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }

.section-head { margin-bottom: 56px; }
.section-head.center { text-align: center; }

.section-eyebrow {
  display: inline-block;
  color: var(--gold-deep);
  font-size: 14px;
  letter-spacing: 4px;
  margin-bottom: 16px;
  font-weight: 600;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--green-deep);
  line-height: 1.35;
}

.section-desc {
  margin-top: 14px;
  color: var(--muted);
  font-size: 16px;
}

.section-head.center .section-eyebrow::before,
.section-head.center .section-eyebrow::after {
  content: "·";
  margin: 0 10px;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-block;
  padding: 13px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--gold);
  color: #fff;
}
.btn-primary:hover { background: var(--gold-deep); transform: translateY(-2px); }

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.15); transform: translateY(-2px); }

.btn-block { width: 100%; border: none; }

/* ============ 导航栏 ============ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: all 0.35s ease;
}

.site-header.scrolled {
  background: rgba(250, 248, 242, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.site-header.scrolled .brand-name,
.site-header.scrolled .nav-link { color: var(--ink); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--green-deep);
  color: var(--gold);
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
}

.brand-name {
  color: #fff;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 2px;
  font-family: var(--font-serif);
  transition: color 0.3s;
}

.site-nav { display: flex; gap: 36px; }

.nav-link {
  color: rgba(255, 255, 255, 0.9);
  font-size: 15px;
  letter-spacing: 1px;
  position: relative;
  transition: color 0.3s;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: var(--gold);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link:hover,
.nav-link.active { color: var(--gold); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--green-deep);
  transition: all 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: heroZoom 14s ease-in-out infinite alternate;
}

@keyframes heroZoom {
  from { transform: scale(1); }
  to { transform: scale(1.08); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20, 40, 32, 0.45) 0%, rgba(20, 40, 32, 0.35) 50%, rgba(20, 40, 32, 0.75) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 120px;
  color: #fff;
  text-align: center;
}

.hero-eyebrow {
  font-size: 15px;
  letter-spacing: 6px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(40px, 7vw, 76px);
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.35);
}

.hero-subtitle {
  max-width: 620px;
  margin: 28px auto 40px;
  font-size: 17px;
  color: rgba(255, 255, 255, 0.88);
}

.hero-actions { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }

.hero-scroll {
  position: absolute;
  bottom: 34px; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 44px;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 14px;
  z-index: 2;
}
.hero-scroll span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  margin-left: -2px;
  border-radius: 2px;
  background: #fff;
  animation: scrollDot 1.8s infinite;
}
@keyframes scrollDot {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 0; transform: translateY(16px); }
  100% { opacity: 0; }
}

/* ============ 关于 ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-images { position: relative; padding-bottom: 60px; }

.about-img-main {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-img-small {
  position: absolute;
  right: -20px;
  bottom: 0;
  width: 45%;
  border-radius: var(--radius);
  border: 8px solid var(--cream);
  box-shadow: var(--shadow);
}

.about-text .section-title { margin-bottom: 24px; }
.about-text > p { color: var(--muted); margin-bottom: 18px; }

.about-features { margin-top: 32px; display: grid; gap: 20px; }

.about-features li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: #fff;
  padding: 18px 20px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(28, 58, 46, 0.06);
}

.feat-icon { font-size: 24px; line-height: 1.4; }
.about-features strong { color: var(--green-deep); font-size: 16px; }
.about-features p { color: var(--muted); font-size: 14px; margin-top: 2px; }

/* ============ 产品 ============ */
.products { background: var(--white); }

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.product-card {
  background: var(--cream);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
}

.product-cover {
  position: relative;
  height: 210px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-tag {
  position: absolute;
  top: 16px; left: 16px;
  background: var(--gold);
  color: #fff;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 1px;
}

.product-emoji {
  font-size: 72px;
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.18));
  transition: transform 0.35s ease;
}

.product-card:hover .product-emoji { transform: scale(1.15) rotate(-6deg); }

.cover-green   { background: linear-gradient(135deg, #dcebdc, #b8d8b8); }
.cover-amber   { background: linear-gradient(135deg, #f3e3c3, #e0bf8f); }
.cover-dark    { background: linear-gradient(135deg, #cbb9a5, #9c8368); }
.cover-silver  { background: linear-gradient(135deg, #eef1f0, #cdd8d5); }
.cover-umber   { background: linear-gradient(135deg, #e4cbb0, #c79c6e); }
.cover-mint    { background: linear-gradient(135deg, #e5f0e2, #c3ddc0); }

.product-info { padding: 24px; }

.product-info h3 {
  color: var(--green-deep);
  font-size: 19px;
  margin-bottom: 10px;
}

.product-info p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px;
  min-height: 66px;
}

.product-price {
  color: var(--gold-deep);
  font-weight: 700;
  font-size: 16px;
}

/* ============ 工艺 ============ */
.craft {
  background: var(--green-deep);
  position: relative;
  overflow: hidden;
}

.craft::before {
  content: "茶";
  position: absolute;
  right: -60px; top: -60px;
  font-family: var(--font-serif);
  font-size: 380px;
  color: rgba(255, 255, 255, 0.04);
  line-height: 1;
}

.craft .section-eyebrow { color: var(--gold); }
.craft .section-title { color: #fff; }

.craft-steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 28px;
  z-index: 1;
}

.craft-step {
  text-align: center;
  padding: 32px 18px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: background 0.3s, transform 0.3s;
}

.craft-step:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-6px);
}

.step-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 34px;
  color: var(--gold);
  margin-bottom: 14px;
}

.craft-step h3 {
  color: #fff;
  font-size: 19px;
  margin-bottom: 10px;
}

.craft-step p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13.5px;
}

/* ============ 数据 ============ */
.stats {
  background: var(--green-soft);
  padding: 72px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: 700;
  color: var(--green-deep);
  display: inline-block;
}

.stat-suffix {
  font-size: 22px;
  color: var(--gold-deep);
  margin-left: 4px;
}

.stat p {
  color: var(--muted);
  margin-top: 8px;
  font-size: 14px;
  letter-spacing: 1px;
}

/* ============ 资讯 ============ */
.news { background: var(--white); }

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.news-card {
  background: var(--cream);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid rgba(28, 58, 46, 0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.news-meta {
  display: flex;
  justify-content: space-between;
  color: var(--gold-deep);
  font-size: 13px;
  margin-bottom: 14px;
}

.news-card h3 {
  color: var(--green-deep);
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 12px;
}

.news-card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 18px;
}

.news-link {
  color: var(--gold-deep);
  font-size: 14px;
  font-weight: 600;
  transition: letter-spacing 0.3s;
}

.news-link:hover { letter-spacing: 2px; }

/* ============ 联系 ============ */
.contact {
  background:
    radial-gradient(ellipse at 20% 20%, rgba(201, 169, 106, 0.12), transparent 50%),
    var(--cream);
}

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info .section-title { margin-bottom: 20px; }
.contact-info > p { color: var(--muted); margin-bottom: 28px; }

.contact-list { display: grid; gap: 14px; }
.contact-list li { color: var(--ink); font-size: 15px; }

.contact-form {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.contact-form h3 {
  color: var(--green-deep);
  font-size: 20px;
  margin-bottom: 8px;
}

.contact-form > p { color: var(--muted); font-size: 14px; margin-bottom: 24px; }

.form-group { margin-bottom: 16px; }

.form-group input {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid rgba(28, 58, 46, 0.15);
  border-radius: 10px;
  font-size: 15px;
  background: var(--cream);
  transition: border-color 0.3s, box-shadow 0.3s;
  outline: none;
  font-family: inherit;
}

.form-group input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 169, 106, 0.18);
}

.form-tip {
  margin-top: 14px;
  font-size: 14px;
  text-align: center;
  min-height: 20px;
}

.form-tip.success { color: var(--green-mid); }
.form-tip.error { color: #c0392b; }

/* ============ 页脚 ============ */
.site-footer {
  background: var(--green-deep);
  color: rgba(255, 255, 255, 0.75);
  padding-top: 64px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 64px;
  padding-bottom: 48px;
}

.footer-brand .brand-name { color: #fff; font-size: 22px; }
.footer-brand .brand-mark { background: rgba(255, 255, 255, 0.08); }
.footer-brand p { margin-top: 16px; font-size: 14px; max-width: 280px; }

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  padding: 5px 0;
  transition: color 0.3s, padding-left 0.3s;
}

.footer-col a:hover {
  color: var(--gold);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ============ 滚动动画 ============ */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .products-grid,
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .craft-steps { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
  .section { padding: 72px 0; }
  .about-grid,
  .contact-wrap { grid-template-columns: 1fr; gap: 48px; }
  .about-img-small { right: 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 700px) {
  .site-nav {
    position: fixed;
    top: 76px; right: 0;
    width: 240px;
    height: calc(100vh - 76px);
    background: var(--cream);
    flex-direction: column;
    padding: 40px 32px;
    gap: 28px;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
  }
  .site-nav.open { transform: translateX(0); }
  .site-nav .nav-link { color: var(--ink); font-size: 16px; }
  .nav-toggle { display: flex; }

  .products-grid,
  .news-grid,
  .craft-steps,
  .stats-grid { grid-template-columns: 1fr; }

  .hero-actions .btn { padding: 12px 26px; }
  .footer-links { grid-template-columns: 1fr; }
}