/* ============ 基础变量 ============ */
:root {
  --gold: #c9a24b;
  --gold-light: #e6c980;
  --gold-dark: #a37e2c;
  --gold-grad: linear-gradient(135deg, #e8cf8f 0%, #c9a24b 45%, #9c7a2e 100%);
  --bg-dark: #12100c;
  --bg-deep: #1a1712;
  --bg-card: #201c15;
  --text: #f4ede0;
  --text-muted: #b8ae9a;
  --border: rgba(201, 162, 75, 0.25);
  --radius: 14px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

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

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* ============ 顶部导航 ============ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(18, 16, 12, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--gold-grad);
  color: #20160a;
  font-size: 22px;
  font-weight: 800;
  box-shadow: 0 4px 16px rgba(201, 162, 75, 0.4);
}

.logo-icon.big {
  width: 72px;
  height: 72px;
  font-size: 36px;
  border-radius: 16px;
  margin-bottom: 16px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text strong {
  font-size: 20px;
  letter-spacing: 2px;
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--gold);
}

.logo-text small {
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--text-muted);
}

.nav {
  display: flex;
  gap: 34px;
}

.nav-link {
  position: relative;
  font-size: 15px;
  color: var(--text-muted);
  padding: 6px 0;
  transition: var(--transition);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--gold-grad);
  transform: translateX(-50%);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold-light);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--gold-light);
  transition: var(--transition);
}

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(201, 162, 75, 0.18), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(201, 162, 75, 0.14), transparent 45%),
    linear-gradient(180deg, #17140e 0%, #12100c 100%);
  z-index: -1;
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 162, 75, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 162, 75, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at center, #000 30%, transparent 75%);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-kicker {
  color: var(--gold-light);
  letter-spacing: 4px;
  font-size: 14px;
  margin-bottom: 18px;
}

.hero-title {
  font-size: clamp(64px, 12vw, 140px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: 14px;
  margin-bottom: 20px;
  text-shadow: 0 8px 40px rgba(201, 162, 75, 0.35);
}

.gold-text {
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--gold);
}

.hero-sub {
  display: block;
  font-size: clamp(16px, 3vw, 26px);
  letter-spacing: 12px;
  color: var(--text-muted);
  font-weight: 400;
  margin-top: 10px;
}

.hero-desc {
  font-size: clamp(16px, 2.4vw, 20px);
  color: var(--text-muted);
  margin: 34px 0;
  letter-spacing: 2px;
}

.hero-actions {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 38px;
  border-radius: 40px;
  font-size: 16px;
  letter-spacing: 2px;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-gold {
  background: var(--gold-grad);
  color: #20160a;
  font-weight: 600;
  box-shadow: 0 6px 24px rgba(201, 162, 75, 0.45);
}

.btn-gold:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(201, 162, 75, 0.6);
}

.btn-outline {
  border-color: var(--gold);
  color: var(--gold-light);
}

.btn-outline:hover {
  background: rgba(201, 162, 75, 0.12);
  transform: translateY(-3px);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 70px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat strong {
  font-size: 40px;
  font-weight: 800;
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--gold);
}

.stat span {
  color: var(--text-muted);
  font-size: 14px;
  letter-spacing: 1px;
}

/* ============ 通用 Section ============ */
.section {
  padding: 100px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 60px;
}

.section-kicker {
  color: var(--gold);
  letter-spacing: 5px;
  font-size: 13px;
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(30px, 5vw, 44px);
  letter-spacing: 6px;
  margin-bottom: 14px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 8px;
}

.section-line {
  width: 60px;
  height: 3px;
  background: var(--gold-grad);
  margin: 18px auto 0;
  border-radius: 2px;
}

/* ============ 关于我们 ============ */
.about {
  background: var(--bg-deep);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  transition: var(--transition);
}

.about-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
}

.about-card h3 {
  font-size: 22px;
  margin-bottom: 18px;
  color: var(--gold-light);
  letter-spacing: 2px;
}

.about-intro p {
  color: var(--text-muted);
  margin-bottom: 24px;
  text-align: justify;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.about-tags span {
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--gold-light);
  background: rgba(201, 162, 75, 0.08);
}

.info-list {
  list-style: none;
}

.info-list li {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(201, 162, 75, 0.15);
  font-size: 14px;
}

.info-list li:last-child {
  border-bottom: none;
}

.info-list span {
  color: var(--text-muted);
  flex-shrink: 0;
  white-space: nowrap;
}

.info-list em {
  font-style: normal;
  color: var(--text);
  text-align: right;
  word-break: break-all;
}

.tel-link {
  color: var(--gold-light);
  font-weight: 600;
  letter-spacing: 1px;
  transition: var(--transition);
}

.tel-link:hover {
  color: var(--gold);
}

.badge {
  display: inline-block;
  padding: 2px 12px;
  background: rgba(74, 173, 111, 0.18);
  color: #7fdaa8;
  border: 1px solid rgba(74, 173, 111, 0.4);
  border-radius: 20px;
  font-size: 13px;
  line-height: 1.6;
}

/* ============ 品牌商标 ============ */
.brand {
  background: var(--bg-dark);
}

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

.trademark-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.trademark-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.tm-image {
  width: 100%;
  aspect-ratio: 3 / 2;
  background: #f7f3ea;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.tm-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
}

.tm-fallback {
  font-size: 42px;
  font-weight: 800;
  color: var(--gold-dark);
  letter-spacing: 4px;
}

.tm-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tm-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 6px;
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--gold);
}

.tm-category {
  display: inline-block;
  align-self: flex-start;
  padding: 3px 12px;
  background: var(--gold-grad);
  color: #20160a;
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 14px;
}

.tm-detail {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
  padding: 7px 0;
  border-bottom: 1px dashed rgba(201, 162, 75, 0.12);
}

.tm-detail:last-of-type {
  border-bottom: none;
}

.tm-status {
  margin-top: 12px;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: #7fdaa8;
  letter-spacing: 2px;
}

/* ============ 企业新闻 ============ */
.news {
  background: var(--bg-deep);
}

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

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.news-card:hover {
  border-color: var(--gold);
  transform: translateY(-6px);
}

.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.news-date {
  color: var(--text-muted);
  font-size: 13px;
}

.news-tag {
  padding: 3px 12px;
  background: rgba(201, 162, 75, 0.15);
  border: 1px solid var(--border);
  color: var(--gold-light);
  border-radius: 20px;
  font-size: 12px;
}

.news-card h3 {
  font-size: 17px;
  line-height: 1.55;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.news-card p {
  color: var(--text-muted);
  font-size: 14px;
  flex: 1;
}

/* ============ 业务范围 ============ */
.business {
  background: var(--bg-dark);
}

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

.business-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 30px;
  text-align: center;
  transition: var(--transition);
}

.business-item:hover {
  border-color: var(--gold);
  transform: translateY(-6px);
}

.business-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gold-grad);
  color: #20160a;
  font-size: 26px;
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(201, 162, 75, 0.35);
}

.business-item h3 {
  font-size: 20px;
  letter-spacing: 3px;
  margin-bottom: 12px;
  color: var(--gold-light);
}

.business-item p {
  color: var(--text-muted);
  font-size: 14px;
}

/* ============ 联系我们 ============ */
.contact {
  background: var(--bg-deep);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 30px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}

.contact-card h3 {
  font-size: 20px;
  letter-spacing: 2px;
  color: var(--gold-light);
  margin-bottom: 20px;
}

.contact-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.contact-brand h3 {
  font-size: 34px;
  letter-spacing: 10px;
  margin: 0 0 6px;
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--gold);
}

.contact-brand p {
  color: var(--text-muted);
  letter-spacing: 4px;
  font-size: 14px;
}

.contact-slogan {
  margin-top: 18px;
  color: var(--gold-light) !important;
  letter-spacing: 2px !important;
}

/* ============ 页脚 ============ */
.footer {
  background: #0c0a07;
  border-top: 1px solid var(--border);
  padding: 36px 0;
}

.footer-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

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

.footer-brand strong {
  display: block;
  letter-spacing: 3px;
  color: var(--gold-light);
}

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

.footer-text {
  color: var(--text-muted);
  font-size: 13px;
}

.footer-text .icp {
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-text .icp:hover {
  color: var(--gold-light);
}

/* ============ 动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

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

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

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(18, 16, 12, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 0 5%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }

  .nav.open {
    max-height: 340px;
  }

  .nav-link {
    padding: 16px 0;
    border-bottom: 1px solid rgba(201, 162, 75, 0.1);
  }

  .nav-toggle {
    display: flex;
  }

  .hero-stats {
    gap: 30px;
  }

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

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

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

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

  .business-grid {
    grid-template-columns: 1fr;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    letter-spacing: 6px;
  }
}