:root {
  --green: #2f9b45;
  --green-dark: #176b32;
  --green-soft: #e9f6ed;
  --orange: #ef5a0a;
  --orange-dark: #16120f;
  --text: #172018;
  --muted: #647067;
  --line: #e4ebe5;
  --paper: #ffffff;
  --soft: #f7faf7;
  --width: 1200px;
  --shadow: 0 18px 45px rgba(22, 42, 25, .12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: var(--paper);
}

img {
  max-width: 100%;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid rgba(228, 235, 229, .88);
  backdrop-filter: blur(12px);
}

.header-inner {
  width: min(var(--width), calc(100% - 32px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 330px;
}

.brand-logo {
  width: 54px;
  height: 54px;
  object-fit: contain;
  flex: 0 0 auto;
}

.brand-text {
  min-width: 0;
  display: block;
}

.brand-title {
  display: block;
  color: #1b261f;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
}

.brand-subtitle {
  display: block;
  margin-top: 4px;
  color: #627166;
  font-size: 10px;
  line-height: 1.2;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 34px;
  color: #3f4942;
  font-size: 15px;
  white-space: nowrap;
}

.nav a {
  position: relative;
  padding: 28px 0;
}

.nav a::after {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18px;
  height: 2px;
  background: var(--green);
  content: "";
  opacity: 0;
  transform: scaleX(.35);
  transition: .2s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--green);
}

.nav a:hover::after,
.nav a.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--green);
  font-size: 19px;
  font-weight: 800;
}

.hero {
  min-height: 640px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, .95), rgba(255, 255, 255, .74) 42%, rgba(255, 255, 255, .24)),
    linear-gradient(180deg, rgba(233, 246, 237, .9), rgba(255, 255, 255, 0) 55%),
    url("../assets/kougan-1000g-bottle.png") right center / auto 100% no-repeat;
  overflow: hidden;
}

.hero-inner {
  width: min(var(--width), calc(100% - 32px));
  min-height: 640px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(300px, 580px) 1fr;
  align-items: center;
}

.badge {
  display: inline-block;
  margin-bottom: 18px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--orange);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(42px, 5vw, 72px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero h1 span {
  color: var(--orange);
}

.hero-lead {
  margin: 20px 0 22px;
  color: #1f2a22;
  font-size: clamp(21px, 2vw, 30px);
  line-height: 1.5;
}

.hero-text {
  width: min(520px, 100%);
  margin: 0 0 28px;
  color: #526057;
  font-size: 16px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 15px;
  font-weight: 700;
}

.btn-primary {
  background: var(--green);
  color: #fff;
}

.btn-ghost {
  border-color: var(--green);
  color: var(--green);
  background: #fff;
}

.hero-stats {
  display: grid;
  width: min(520px, 100%);
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat {
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .78);
  box-shadow: 0 10px 30px rgba(30, 55, 33, .08);
}

.stat strong {
  display: block;
  color: var(--green);
  font-size: 21px;
  line-height: 1.2;
}

.stat span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.section {
  padding: 76px 0;
}

.section-soft {
  background: var(--soft);
}

.wrap {
  width: min(var(--width), calc(100% - 32px));
  margin: 0 auto;
}

.section-head {
  margin-bottom: 38px;
  text-align: center;
}

.section-kicker {
  color: #b4beb7;
  font-size: 12px;
  text-transform: uppercase;
}

.section-head h2 {
  margin: 8px 0 0;
  font-size: 30px;
  line-height: 1.35;
}

.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: -112px;
  position: relative;
  z-index: 5;
}

.feature {
  min-height: 126px;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .94);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 58px;
  height: 58px;
  border: 2px solid rgba(239, 90, 10, .25);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--orange);
  font-size: 24px;
  font-weight: 800;
}

.feature h3 {
  margin: 0 0 6px;
  font-size: 20px;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.product-band {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 42px;
  align-items: center;
  padding: 34px;
  border: 1px solid var(--line);
  background: #fff;
}

.product-media {
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line);
}

.product-media img {
  display: block;
  width: 100%;
}

.product-copy h2 {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1.35;
}

.product-copy p {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.spec {
  min-height: 98px;
  padding: 16px;
  border: 1px solid var(--line);
  background: #fbfdfb;
}

.spec strong {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
}

.spec span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.effects {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.effect {
  min-height: 190px;
  padding: 22px 18px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--orange);
  background: #fff;
}

.effect strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
}

.effect p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.crop-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}

.crop {
  min-height: 92px;
  padding: 18px 12px;
  border: 1px solid var(--line);
  background: #fff;
  text-align: center;
}

.crop strong {
  display: block;
  margin-bottom: 7px;
  color: var(--green-dark);
  font-size: 17px;
}

.crop span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

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

.application-card {
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
}

.application-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.application-card div {
  padding: 18px;
}

.application-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.application-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.about-band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
  align-items: center;
}

.about-copy p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.95;
}

.tech-list {
  display: grid;
  gap: 12px;
}

.tech-item {
  padding: 18px 20px;
  border-left: 4px solid var(--green);
  background: #fff;
}

.tech-item strong {
  display: block;
  margin-bottom: 5px;
}

.tech-item span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.contact-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 34px;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(23, 107, 50, .96), rgba(47, 155, 69, .9)),
    url("../assets/kougan-poster-applications.png") center / cover no-repeat;
}

.contact-band h2 {
  margin: 0 0 8px;
  font-size: 28px;
}

.contact-band p {
  margin: 0;
  color: rgba(255, 255, 255, .82);
  font-size: 15px;
}

.contact-band .btn {
  background: #fff;
  color: var(--green);
}

.site-footer {
  padding: 54px 0 18px;
  background: #202522;
  color: rgba(255, 255, 255, .72);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 34px;
  margin-bottom: 34px;
}

.footer-grid h3 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 17px;
}

.footer-grid p,
.footer-grid a {
  display: block;
  margin: 0 0 9px;
  color: rgba(255, 255, 255, .68);
  font-size: 14px;
  line-height: 1.7;
}

.copyright {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding-top: 18px;
  color: rgba(255, 255, 255, .45);
  font-size: 13px;
  text-align: center;
}

.page-hero {
  padding: 74px 0;
  background:
    linear-gradient(90deg, rgba(23, 107, 50, .88), rgba(47, 155, 69, .6)),
    url("../assets/kougan-outdoor-01.png") center / cover no-repeat;
  color: #fff;
}

.page-hero h1 {
  margin: 0 0 12px;
  font-size: 42px;
}

.page-hero p {
  width: min(620px, 100%);
  margin: 0;
  color: rgba(255, 255, 255, .86);
  font-size: 17px;
  line-height: 1.8;
}

.detail-layout {
  display: grid;
  grid-template-columns: 480px 1fr;
  gap: 46px;
  align-items: start;
}

.detail-image {
  border: 1px solid var(--line);
  padding: 12px;
  background: #fff;
}

.detail-image img {
  display: block;
}

.detail-info h2 {
  margin: 0 0 14px;
  font-size: 34px;
}

.detail-info .lead {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 26px;
}

.info-table th,
.info-table td {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
  text-align: left;
  vertical-align: top;
  font-size: 15px;
  line-height: 1.7;
}

.info-table th {
  width: 118px;
  color: var(--muted);
  font-weight: 400;
}

.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.method {
  padding: 24px;
  border: 1px solid var(--line);
  background: #fff;
}

.method h3 {
  margin: 0 0 14px;
  font-size: 21px;
}

.method ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 15px;
  line-height: 2;
}

@media (max-width: 1100px) {
  .hero {
    background-position: 70% center;
  }

  .feature-row,
  .effects,
  .spec-grid,
  .crop-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-band,
  .about-band,
  .detail-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .header-inner {
    min-height: auto;
    padding: 16px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    gap: 0;
    overflow-x: auto;
    justify-content: space-between;
    font-size: 14px;
  }

  .nav a {
    padding: 10px 18px 10px 0;
  }

  .nav a::after {
    bottom: 4px;
  }

  .header-phone {
    font-size: 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand-logo {
    width: 48px;
    height: 48px;
  }

  .brand-title {
    font-size: 18px;
    white-space: normal;
  }

  .brand-subtitle {
    font-size: 9px;
    white-space: normal;
  }

  .hero,
  .hero-inner {
    min-height: 560px;
  }

  .hero {
    background:
      linear-gradient(180deg, rgba(255, 255, 255, .96), rgba(255, 255, 255, .78) 62%, rgba(255, 255, 255, .2)),
      url("../assets/kougan-1000g-bottle.png") center bottom / 120% auto no-repeat;
  }

  .hero-inner {
    display: block;
    padding-top: 48px;
  }

  .hero-stats,
  .feature-row,
  .effects,
  .spec-grid,
  .crop-grid,
  .application-grid,
  .footer-grid,
  .method-grid {
    grid-template-columns: 1fr;
  }

  .feature-row {
    margin-top: 0;
    padding-top: 34px;
  }

  .section {
    padding: 52px 0;
  }

  .product-band,
  .contact-band {
    padding: 24px;
  }

  .contact-band {
    grid-template-columns: 1fr;
  }

  .page-hero h1 {
    font-size: 34px;
  }
}