/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* 赫尔南品牌VI色系 */
  --brand-green: #0B2F1F;       /* 主色：深墨绿 */
  --brand-green-light: #1A4A33; /* 主色浅版 */
  --brand-red: #8B0A1A;         /* 辅助色：酒红 */
  --brand-red-light: #B0303F;   /* 辅助色浅版 */
  --brand-gold: #C8A063;         /* 点缀金（极少量使用） */
  --brand-white: #FFFFFF;       /* 反白 */
  --brand-cream: #F5F2ED;       /* 米白底色 */
  --brand-gray: #8C8C8C;        /* 中灰文字 */
  --brand-dark: #051810;        /* 更深的墨绿（背景层） */
  --brand-border: rgba(255,255,255,0.08);

  /* 字体 */
  --font-serif: 'Cormorant Garamond', 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --font-sans: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* 尺寸 */
  --max-width: 1400px;
  --nav-height: 72px;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--brand-dark);
  color: var(--brand-cream);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(5, 24, 16, 0.85);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  border-bottom: 1px solid var(--brand-border);
  transition: background 0.3s;
}
.nav-logo {
  display: flex;
  align-items: center;
  height: 42px;
}
.nav-logo img {
  height: 42px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}
.footer .nav-logo img {
  height: 56px;
  max-width: 240px;
}
.nav-menu {
  display: flex;
  gap: 36px;
  list-style: none;
}
.nav-menu a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  transition: color 0.3s;
  position: relative;
  padding-bottom: 4px;
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--brand-gold);
}
.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: var(--brand-gold);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--brand-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== 通用布局 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
}
.section {
  padding: 100px 0;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--brand-white);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.section-subtitle {
  font-size: 0.95rem;
  color: var(--brand-gray);
  text-align: center;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 60px;
}
.section-divider {
  width: 40px;
  height: 2px;
  background: var(--brand-red);
  margin: 16px auto 60px;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--brand-dark);
}
.hero-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
}
.hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(180deg, rgba(5,24,16,0.6) 0%, rgba(5,24,16,0.85) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
}
.hero-content h1 {
  font-family: var(--font-serif);
  font-size: 4.5rem;
  font-weight: 700;
  color: var(--brand-white);
  letter-spacing: 2px;
  margin-bottom: 8px;
  line-height: 1.1;
}
.hero-content .brand-zh {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--brand-gold);
  letter-spacing: 6px;
  margin-bottom: 24px;
}
.hero-content .slogan {
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
  letter-spacing: 4px;
}
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.4);
  font-size: 0.75rem;
  letter-spacing: 2px;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== 数据条 ===== */
.stats-bar {
  background: var(--brand-green);
  padding: 48px 0;
  border-top: 1px solid var(--brand-border);
  border-bottom: 1px solid var(--brand-border);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  text-align: center;
}
.stat-item {
  border-right: 1px solid rgba(255,255,255,0.1);
  padding: 0 20px;
}
.stat-item:last-child { border-right: none; }
.stat-number {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--brand-gold);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 1px;
}

/* ===== 三大核心优势 ===== */
.advantages {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.advantage-card {
  background: rgba(11, 47, 31, 0.4);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 48px 36px;
  text-align: center;
  transition: all 0.3s;
}
.advantage-card:hover {
  border-color: var(--brand-gold);
  background: rgba(11, 47, 31, 0.6);
  transform: translateY(-4px);
}
.advantage-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}
.advantage-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--brand-white);
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.advantage-card p {
  font-size: 0.9rem;
  color: var(--brand-gray);
  line-height: 1.7;
}

/* ===== 图片入口卡 ===== */
.entry-section {
  padding: 0;
  background: var(--brand-dark);
}
.entry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2px;
}
.entry-card {
  position: relative;
  height: 480px;
  overflow: hidden;
  cursor: pointer;
}
.entry-card .entry-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.6s ease;
}
.entry-card:hover .entry-bg {
  transform: scale(1.05);
}
.entry-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5,24,16,0.9) 100%);
}
.entry-card-content {
  position: absolute;
  bottom: 40px;
  left: 0; right: 0;
  z-index: 2;
  text-align: center;
}
.entry-card-content h3 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--brand-white);
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.entry-card-content p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 2px;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.entry-btn {
  display: inline-block;
  padding: 10px 32px;
  border: 1px solid var(--brand-gold);
  color: var(--brand-gold);
  font-size: 0.85rem;
  letter-spacing: 2px;
  transition: all 0.3s;
}
.entry-btn:hover {
  background: var(--brand-gold);
  color: var(--brand-dark);
}

/* ===== 信任背书条 ===== */
.trust-bar {
  background: var(--brand-green);
  padding: 60px 0;
}
.trust-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  letter-spacing: 1px;
}
.trust-item .check {
  color: var(--brand-gold);
}

/* ===== 时间线 ===== */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 0;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: var(--brand-border);
}
.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 40px 60px 0;
  text-align: right;
}
.timeline-item:nth-child(even) {
  left: 50%;
  padding: 0 0 60px 40px;
  text-align: left;
}
.timeline-item::before {
  content: '';
  position: absolute;
  top: 6px;
  right: -7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--brand-red);
  border: 2px solid var(--brand-green);
  z-index: 2;
}
.timeline-item:nth-child(even)::before {
  left: -7px;
  right: auto;
}
.timeline-year {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--brand-gold);
  font-weight: 700;
  margin-bottom: 8px;
}
.timeline-text {
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
}

/* ===== 画廊网格 ===== */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  aspect-ratio: 4/3;
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.gallery-item:hover img {
  transform: scale(1.05);
}
.gallery-item.large {
  grid-column: span 2;
  grid-row: span 2;
  aspect-ratio: auto;
}
.gallery-item.wide {
  grid-column: span 2;
}

/* ===== 参数表 ===== */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 40px 0;
}
.compare-table th {
  background: var(--brand-green);
  color: var(--brand-gold);
  padding: 16px 20px;
  text-align: left;
  font-size: 0.9rem;
  letter-spacing: 1px;
  border: 1px solid var(--brand-border);
}
.compare-table td {
  padding: 14px 20px;
  border: 1px solid var(--brand-border);
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
}
.compare-table tr:nth-child(even) td {
  background: rgba(11, 47, 31, 0.3);
}
.compare-table .highlight {
  color: var(--brand-gold);
  font-weight: 600;
}

/* ===== FAQ手风琴 ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--brand-border);
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  cursor: pointer;
  font-size: 1rem;
  color: var(--brand-white);
  transition: color 0.3s;
}
.faq-question:hover {
  color: var(--brand-gold);
}
.faq-question .arrow {
  color: var(--brand-gold);
  transition: transform 0.3s;
  font-size: 0.8rem;
}
.faq-item.open .faq-question .arrow {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--brand-gray);
  font-size: 0.9rem;
  line-height: 1.7;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

/* ===== 产品卡片 ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.product-card {
  background: rgba(11, 47, 31, 0.3);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s;
}
.product-card:hover {
  border-color: var(--brand-gold);
  transform: translateY(-4px);
}
.product-card .product-img {
  width: 100%;
  height: 280px;
  background-size: cover;
  background-position: center;
}
.product-card .product-body {
  padding: 28px;
}
.product-card h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--brand-white);
  margin-bottom: 8px;
}
.product-card .product-tag {
  display: inline-block;
  padding: 3px 12px;
  background: var(--brand-red);
  color: white;
  font-size: 0.75rem;
  letter-spacing: 1px;
  border-radius: 2px;
  margin-bottom: 12px;
}
.product-card p {
  font-size: 0.88rem;
  color: var(--brand-gray);
  line-height: 1.6;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--brand-dark);
  border-top: 1px solid var(--brand-border);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand h3 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--brand-white);
  margin-bottom: 8px;
}
.footer-brand .brand-sub {
  font-size: 0.85rem;
  color: var(--brand-gold);
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--brand-gray);
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 0.9rem;
  color: var(--brand-white);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  font-size: 0.85rem;
  color: var(--brand-gray);
  margin-bottom: 8px;
}
.footer-col a:hover {
  color: var(--brand-gold);
}
.footer-bottom {
  border-top: 1px solid var(--brand-border);
  padding-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
}

/* ===== 联系表单 ===== */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}
.form-group {
  margin-bottom: 24px;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--brand-gray);
  margin-bottom: 8px;
  letter-spacing: 1px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(11, 47, 31, 0.4);
  border: 1px solid var(--brand-border);
  border-radius: 4px;
  color: var(--brand-white);
  font-size: 0.9rem;
  font-family: var(--font-sans);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--brand-gold);
}
.btn-submit {
  display: block;
  width: 100%;
  padding: 14px;
  background: var(--brand-red);
  color: white;
  border: none;
  font-size: 0.95rem;
  letter-spacing: 2px;
  cursor: pointer;
  border-radius: 4px;
  transition: background 0.3s;
}
.btn-submit:hover {
  background: var(--brand-red-light);
}

/* ===== 展厅分区图 ===== */
.zone-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.zone-item {
  background: rgba(11, 47, 31, 0.3);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  transition: all 0.3s;
}
.zone-item:hover {
  border-color: var(--brand-gold);
}
.zone-item .zone-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--brand-gold);
  margin-bottom: 8px;
}
.zone-item h4 {
  font-size: 0.95rem;
  color: var(--brand-white);
  margin-bottom: 6px;
}
.zone-item p {
  font-size: 0.8rem;
  color: var(--brand-gray);
}

/* ===== 工厂数据卡 ===== */
.factory-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 40px 0;
}
.factory-stat {
  text-align: center;
  padding: 32px 16px;
  background: rgba(11, 47, 31, 0.3);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
}
.factory-stat .num {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--brand-gold);
  line-height: 1;
  margin-bottom: 8px;
}
.factory-stat .unit {
  font-size: 0.9rem;
  color: var(--brand-gold);
}
.factory-stat .desc {
  font-size: 0.85rem;
  color: var(--brand-gray);
  margin-top: 4px;
}

/* ===== 品牌定位金字塔 ===== */
.pyramid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin: 40px auto;
}
.pyramid-row {
  display: flex;
  align-items: center;
  justify-content: center;
}
.pyramid-tier {
  padding: 20px 40px;
  text-align: center;
  border: 1px solid var(--brand-border);
  border-radius: 4px;
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
  transition: all 0.3s;
}
.pyramid-tier:hover {
  border-color: var(--brand-gold);
  color: var(--brand-white);
}
.pyramid-tier.gold {
  border-color: var(--brand-gold);
  color: var(--brand-gold);
}

/* ===== 筛选按钮 ===== */
.filter-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 44px;
}
.filter-btn {
  padding: 8px 20px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 2px;
  color: var(--brand-cream);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.3s;
  font-family: var(--font-sans);
}
.filter-btn:hover {
  border-color: var(--brand-gold);
  color: var(--brand-gold);
}
.filter-btn.active {
  background: var(--brand-red);
  border-color: var(--brand-red);
  color: var(--brand-white);
}
.gallery-item.hidden {
  display: none;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .nav-toggle { display: block; }
  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--brand-dark);
    padding: 20px 48px;
    gap: 20px;
  }
  .hero-content h1 { font-size: 3rem; }
  .hero-content .brand-zh { font-size: 1.4rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 24px; }
  .advantages { grid-template-columns: 1fr; }
  .entry-grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .gallery-item.large { grid-column: span 2; }
  .product-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .factory-stats { grid-template-columns: repeat(2, 1fr); }
  .zone-grid { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 24px; }
  .navbar { padding: 0 24px; }
}
@media (max-width: 640px) {
  .hero-content h1 { font-size: 2.2rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .gallery-item.large { grid-column: span 1; }
  .footer-grid { grid-template-columns: 1fr; }
  .factory-stats { grid-template-columns: 1fr; }
  .zone-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.8rem; }
}