:root {
  --brand: #2d5878;
  --brand-dark: #173a55;
  --brand-soft: #e8f0f4;
  --ink: #1f2933;
  --muted: #67727d;
  --line: #e8e2da;
  --cream: #fbf7ef;
  --warm: #f3e5d2;
  --white: #fffdf8;
  --shadow: 0 20px 60px rgba(45, 88, 120, 0.15);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.65;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

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

button {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 253, 248, 0.86);
  border-bottom: 1px solid rgba(232, 226, 218, 0.8);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  color: #fff;
  background: var(--brand);
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  font-size: 15px;
  line-height: 0.9;
  box-shadow: 0 10px 22px rgba(45, 88, 120, 0.24);
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand strong {
  font-size: 18px;
  letter-spacing: 0.02em;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  color: var(--muted);
  font-size: 14px;
}

.nav a {
  transition: color 0.2s ease;
}

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

.hero {
  position: relative;
  min-height: calc(100vh - 81px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background: var(--cream);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(251, 247, 239, 0.96) 0%, rgba(251, 247, 239, 0.86) 34%, rgba(251, 247, 239, 0.1) 70%);
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(650px, calc(100% - 36px));
  margin-left: clamp(18px, 7vw, 96px);
  padding: 58px 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 620px;
  margin-bottom: 20px;
  color: var(--brand-dark);
  font-size: clamp(40px, 7vw, 74px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  color: var(--brand-dark);
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
}

h3 {
  margin-bottom: 8px;
  color: var(--brand-dark);
  font-size: 20px;
  line-height: 1.35;
}

.hero-lede {
  max-width: 560px;
  margin-bottom: 28px;
  color: #43515d;
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #fff;
  background: var(--brand);
  box-shadow: 0 14px 28px rgba(45, 88, 120, 0.25);
}

.button.secondary {
  color: var(--brand-dark);
  background: rgba(255, 255, 255, 0.8);
  border-color: rgba(45, 88, 120, 0.18);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 580px;
  margin: 0;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.66);
  box-shadow: 0 10px 30px rgba(45, 88, 120, 0.08);
}

.hero-stats dt {
  color: var(--brand);
  font-size: 28px;
  font-weight: 800;
  line-height: 1;
}

.hero-stats dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: clamp(62px, 8vw, 108px) clamp(18px, 5vw, 72px);
}

.section-heading {
  max-width: 880px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-heading.narrow {
  max-width: 760px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.intro {
  background: linear-gradient(180deg, #fffdf8 0%, #f7f1e8 100%);
}

.intro-grid,
.customer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
}

.intro-grid article,
.customer-grid article {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
}

.intro-grid span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 800;
}

.intro-grid p,
.customer-grid p,
.product-list p,
.supply-cards p,
.quality-copy p,
.split-copy p,
.wechat-copy p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(34px, 6vw, 76px);
  align-items: center;
  max-width: 1220px;
  margin: 0 auto;
}

.split-copy > p {
  max-width: 600px;
  font-size: 18px;
}

.product-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.product-list article {
  padding: 22px 24px;
  border-left: 4px solid var(--brand);
  border-radius: 8px;
  background: var(--brand-soft);
}

.product-gallery {
  background: #fffdf8;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
}

.gallery-card {
  position: relative;
  min-height: 340px;
  overflow: hidden;
  border-radius: 8px;
  background: var(--cream);
  box-shadow: 0 16px 40px rgba(45, 88, 120, 0.1);
}

.gallery-card.large {
  grid-column: span 2;
  grid-row: span 2;
  min-height: 696px;
}

.gallery-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.gallery-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 45%;
  background: linear-gradient(180deg, rgba(15, 30, 45, 0), rgba(15, 30, 45, 0.62));
}

.gallery-card div {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  padding: 18px;
  color: #fff;
}

.gallery-card span,
.gallery-card strong {
  display: block;
}

.gallery-card span {
  margin-bottom: 4px;
  font-size: 13px;
  opacity: 0.78;
}

.gallery-card strong {
  font-size: 18px;
  line-height: 1.35;
}

.image-stack {
  position: relative;
}

.image-stack img,
.quality-image img,
.supply-panel img {
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.floating-note {
  position: absolute;
  right: 20px;
  bottom: 20px;
  max-width: 260px;
  padding: 18px 20px;
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.9);
  box-shadow: 0 18px 45px rgba(23, 58, 85, 0.16);
}

.floating-note strong,
.floating-note span {
  display: block;
}

.floating-note strong {
  color: var(--brand-dark);
  font-size: 18px;
}

.floating-note span {
  color: var(--muted);
  font-size: 13px;
}

.supply {
  background: #f5efe5;
}

.supply-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 22px;
  align-items: stretch;
  max-width: 1180px;
  margin: 0 auto;
}

.supply-panel img {
  height: 100%;
  object-fit: cover;
}

.supply-cards {
  display: grid;
  gap: 14px;
}

.supply-cards article {
  padding: 24px;
  border-radius: 8px;
  background: #fffdf8;
  box-shadow: 0 16px 38px rgba(45, 88, 120, 0.1);
}

.supply-cards span {
  display: inline-flex;
  margin-bottom: 8px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
}

.supply-cards strong {
  display: block;
  color: var(--brand-dark);
  font-size: 22px;
}

.quality {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(0, 1fr);
  gap: clamp(34px, 6vw, 76px);
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
}

.checks {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.checks li {
  position: relative;
  padding: 14px 18px 14px 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
}

.checks li::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 18px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--brand);
  box-shadow: 0 0 0 5px var(--brand-soft);
}

.customers {
  background: linear-gradient(180deg, #fffdf8 0%, #edf4f7 100%);
}

.wechat-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: clamp(28px, 5vw, 58px);
  align-items: center;
  margin: clamp(28px, 5vw, 72px);
  padding: clamp(34px, 6vw, 68px);
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  box-shadow: var(--shadow);
}

.wechat-section .eyebrow,
.wechat-section h2 {
  color: #fff;
}

.wechat-copy p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.wechat-id {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  width: fit-content;
  margin-top: 24px;
  padding: 12px 14px 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.wechat-id span {
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
}

.wechat-id strong {
  font-size: 20px;
}

.wechat-id button,
.copy-wechat:not(.button) {
  border: 0;
  border-radius: 999px;
  color: var(--brand-dark);
  background: #fff;
  cursor: pointer;
  font-weight: 800;
}

.wechat-id button {
  padding: 8px 14px;
}

.qr-card {
  padding: 18px;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 24px 48px rgba(15, 30, 45, 0.22);
}

.qr-card img {
  border-radius: 6px;
}

.qr-card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(18px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #fffdf8;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--brand);
  font-weight: 700;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 20;
  padding: 12px 18px;
  border-radius: 999px;
  color: #fff;
  background: rgba(23, 58, 85, 0.94);
  opacity: 0;
  transform: translate(-50%, 16px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

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

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: auto;
    padding-top: 340px;
  }

  .hero::after {
    background: linear-gradient(180deg, rgba(251, 247, 239, 0.08) 0%, rgba(251, 247, 239, 0.96) 42%, #fbf7ef 100%);
  }

  .hero-image {
    height: 420px;
    object-position: 63% top;
  }

  .hero-content {
    width: calc(100% - 36px);
    margin: 0 auto;
    padding: 34px 0 52px;
  }

  .hero-stats,
  .intro-grid,
  .customer-grid,
  .split,
  .gallery-grid,
  .supply-panel,
  .quality,
  .wechat-section {
    grid-template-columns: 1fr;
  }

  .gallery-card.large {
    grid-column: auto;
    grid-row: auto;
    min-height: 420px;
  }

  .wechat-section {
    margin: 18px;
  }

  .qr-card {
    max-width: 330px;
    margin: 0 auto;
  }
}

@media (max-width: 560px) {
  .brand-mark {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    font-size: 13px;
  }

  .hero {
    padding-top: 300px;
  }

  .hero-image {
    height: 360px;
  }

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

  .hero-stats {
    gap: 10px;
  }

  .hero-stats div {
    padding: 14px 12px;
  }

  .hero-stats dt {
    font-size: 22px;
  }

  .section {
    padding: 56px 18px;
  }

  .intro-grid article,
  .customer-grid article,
  .supply-cards article {
    padding: 22px;
  }

  .floating-note {
    position: static;
    max-width: none;
    margin-top: 12px;
  }

  .gallery-card,
  .gallery-card.large {
    min-height: 390px;
  }

  .wechat-section {
    padding: 30px 20px;
  }

  .wechat-id {
    width: 100%;
    border-radius: 8px;
  }

  .site-footer {
    flex-direction: column;
  }
}