:root {
  --yellow: #f5c00c;
  --yellow-dark: #e0ad00;
  --dark: #2f2f2f;
  --darker: #1f1f1f;
  --gray: #555;
  --muted: #888;
  --white: #ffffff;
  --max: 1200px;
  --radius: 12px;
  --shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(100% - 32px, var(--max));
  margin-inline: auto;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark);
  color: var(--white);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand img,
.brand svg {
  width: auto;
  height: 44px;
  display: block;
}

.brand-name {
  display: inline-block;
  font-size: 15px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav a {
  position: relative;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.92);
  transition: color 0.2s;
}

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

.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 2px;
  background: var(--yellow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}

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

.btn-contact {
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--yellow);
  color: var(--white);
  font-size: 14px;
  white-space: nowrap;
}

.btn-contact:hover {
  background: var(--yellow-dark);
}

.btn-contact svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: 28px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  padding: 10px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  margin: 6px 0;
  background: currentColor;
  border-radius: 2px;
  transition: 0.2s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: #0054ff;
  color: var(--white);
  overflow: hidden;
}

.hero-banner {
  display: block;
  width: 100%;
  height: auto;
  /* 完整显示含左右蓝边，不拉伸变形 */
  object-fit: contain;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  background: linear-gradient(
    90deg,
    rgba(0, 40, 140, 0.35) 0%,
    rgba(0, 40, 140, 0.12) 45%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-overlay .btn,
.hero-overlay a {
  pointer-events: auto;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 48px 0;
  max-width: 640px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.35);
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.25;
}

.hero .slogan {
  margin: 0;
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 500;
}

.hero .slogan-en {
  margin: 8px 0 28px;
  font-size: 14px;
  opacity: 0.9;
  letter-spacing: 0.04em;
}

.btn-more {
  padding: 12px 28px 12px 14px;
  border-radius: 999px;
  background: var(--yellow);
  color: var(--white);
  font-size: 15px;
}

.btn-more .icon-circle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  color: var(--yellow);
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 700;
}

.btn-more:hover {
  background: var(--yellow-dark);
}

/* ---------- Advantages ---------- */
.advantages {
  padding: 72px 0 40px;
  background: var(--white);
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  margin: 0;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--dark);
}

.section-title p {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.adv-card {
  background: linear-gradient(180deg, #f7c820 0%, #f0b400 100%);
  color: var(--white);
  border-radius: var(--radius);
  padding: 28px 18px;
  text-align: center;
  box-shadow: var(--shadow);
  min-height: 148px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  transition: transform 0.25s ease;
}

.adv-card:hover {
  transform: translateY(-4px);
}

.adv-card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.adv-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  opacity: 0.95;
  white-space: pre-line;
}

/* ---------- About ---------- */
.about {
  padding: 48px 0 80px;
  background: var(--white);
  overflow: hidden;
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 28px;
  align-items: stretch;
}

.about-visual {
  position: relative;
  min-height: 420px;
}

.about-panel {
  width: 78%;
  height: 100%;
  min-height: 420px;
  border-radius: 18px;
  background:
    linear-gradient(160deg, #2a2a2a, #0f0f0f),
    url("../assets/images/geo-dark.jpg") center / cover;
  box-shadow: var(--shadow);
}

.about-logo-card {
  position: absolute;
  top: 28px;
  left: -28px;
  width: min(160px, 52%);
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
  text-align: center;
  box-shadow: none;
  z-index: 2;
}

.about-logo-card .logo2 {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

/* 公司名叠在 logo 下半偏上位置 */
.about-logo-card .cn {
  position: absolute;
  left: 6%;
  right: 6%;
  bottom: 8%;
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.35;
  text-align: center;
}

.about-leather {
  position: absolute;
  right: 8px;
  bottom: 36px;
  width: min(220px, 46%);
  border-radius: 14px;
  /* border: 4px solid var(--yellow); 暂时注释自作黄框，避免与实物图重叠 */
  overflow: visible;
  box-shadow: var(--shadow);
  background: #fff;
}

.about-leather img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  border-radius: 14px;
}

.about-right {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  min-width: 0;
}

.about-tab {
  position: relative;
  top: auto;
  left: auto;
  width: min(300px, 72%);
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 12px 52px 12px 28px;
  background: url("../assets/images/about-tab.png") left center / 100% 100% no-repeat;
  color: var(--white);
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 28px);
  letter-spacing: 0.08em;
  box-sizing: border-box;
}

.about-copy {
  position: relative;
  width: 100%;
  background: var(--yellow);
  color: var(--white);
  border-radius: 18px;
  padding: 36px 36px 36px;
  box-shadow: var(--shadow);
  box-sizing: border-box;
}

.about-copy h3 {
  margin: 0 0 16px;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
}

.about-copy p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.85;
  text-align: justify;
}

.about-copy p:last-child {
  margin-bottom: 0;
  font-weight: 600;
}

/* ---------- Products ---------- */
.products {
  position: relative;
  padding: 64px 0 72px;
  background-color: var(--yellow);
  background-image: url("../assets/images/products-mask.png");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  color: var(--white);
  overflow: hidden;
}

.products > .container {
  position: relative;
  z-index: 1;
}

.products-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.products-head h2 {
  margin: 0;
  font-size: clamp(26px, 3.2vw, 36px);
  font-weight: 800;
  color: var(--dark);
}

.products-head h2 span {
  color: var(--white);
}

.products-head .en {
  margin: 6px 0 0;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.9);
}

.tabs {
  display: inline-flex;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  background: rgba(255, 255, 255, 0.12);
}

.tab {
  min-width: 88px;
  padding: 10px 22px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--white);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s;
}

.tab.is-active {
  background: var(--dark);
  color: var(--white);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  aspect-ratio: 3 / 4;
  border-radius: 18px;
  background: #3a3a3a;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
  overflow: hidden;
  position: relative;
}

.product-card::after {
  content: attr(data-label);
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px;
  text-align: center;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.65));
  color: var(--white);
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.2s;
}

.product-card:hover::after {
  opacity: 1;
}

.product-panel[hidden] {
  display: none;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.92);
  padding: 40px 0 28px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.footer-nav h4 {
  margin: 0;
  font-size: 16px;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.footer-links a:hover {
  color: var(--yellow);
}

.footer-bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-top: 28px;
  flex-wrap: wrap;
}

.contact-list {
  display: grid;
  gap: 12px;
  font-size: 14px;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-list svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--yellow);
}

.qr-box {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.qr-label {
  writing-mode: vertical-rl;
  background: var(--yellow);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  padding: 12px 8px;
  border-radius: 8px 0 0 8px;
}

.qr-box img {
  width: 112px;
  height: 112px;
  background: var(--white);
  padding: 6px;
  border-radius: 0 8px 8px 0;
}

.copyright {
  margin-top: 28px;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- Inner pages ---------- */
.page-hero {
  padding: 56px 0;
  background: linear-gradient(135deg, #2f2f2f, #1a1a1a);
  color: var(--white);
  text-align: center;
}

.page-hero h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 36px);
}

.page-hero p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
}

.page-body {
  padding: 56px 0 80px;
}

.page-body .card-box {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px;
  border-radius: 16px;
  background: #fafafa;
  border: 1px solid #eee;
}

.page-body p {
  margin: 0 0 14px;
  color: var(--gray);
  line-height: 1.8;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .adv-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-layout {
    grid-template-columns: 1fr;
  }

  .about-visual {
    min-height: 360px;
  }

  .about-panel {
    width: 100%;
    min-height: 320px;
  }

  .about-leather {
    width: min(180px, 42%);
    bottom: 20px;
    right: 4px;
  }

  .about-tab {
    width: min(260px, 80%);
    min-height: 50px;
    font-size: 22px;
    padding: 10px 44px 10px 22px;
  }

  .about-right {
    gap: 14px;
  }

  .about-copy {
    padding: 28px 22px;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-wrap {
    position: fixed;
    inset: 72px 0 auto 0;
    background: var(--darker);
    padding: 20px 24px 28px;
    display: none;
    flex-direction: column;
    gap: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.25);
  }

  .nav-wrap.is-open {
    display: flex;
  }

  .nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }

  .nav a.is-active::after {
    display: none;
  }

  .btn-contact {
    width: 100%;
  }

  .hero-content {
    padding: 28px 0;
    max-width: none;
  }

  .hero h1 {
    font-size: clamp(20px, 5.5vw, 28px);
  }

  .hero .slogan {
    font-size: 14px;
  }

  .hero .slogan-en {
    font-size: 12px;
    margin-bottom: 18px;
  }

  .advantages {
    padding: 48px 0 24px;
  }

  .product-grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin-inline: auto;
  }

  .footer-nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .adv-grid {
    grid-template-columns: 1fr;
  }

  .brand-name {
    display: none;
  }
}