/* ========== 磐矜石材 - 品牌官网样式 ========== */
:root {
  --primary: #1a1a1a;
  --primary-light: #333;
  --accent: #c9a96e;
  --accent-light: #e0d0b0;
  --white: #ffffff;
  --off-white: #fafaf9;
  --light-gray: #f5f4f1;
  --mid-gray: #e8e6e1;
  --gray: #999;
  --dark-gray: #666;
  --text: #2c2c2c;
  --text-light: #777;
  --radius: 4px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-en: "Cormorant Garamond", "Playfair Display", Georgia, serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-cn);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
  padding: 0 40px;
}
.navbar.scrolled { border-bottom-color: var(--mid-gray); box-shadow: var(--shadow-sm); }

.nav-inner {
  max-width: var(--max-width); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 28px; font-weight: 700; letter-spacing: 4px;
  color: var(--primary);
  font-family: var(--font-cn);
  display: flex; align-items: center;
}
.logo img { display: block; }
.logo span { color: var(--accent); font-weight: 300; font-size: 14px; letter-spacing: 2px; display: block; line-height: 1; }

.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-links a {
  font-size: 14px; letter-spacing: 1px;
  color: var(--primary-light);
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 1px;
  background: var(--accent); transition: width var(--transition);
}
.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  background: var(--accent); color: #fff !important;
  padding: 10px 24px !important; border-radius: var(--radius);
  font-weight: 500; transition: background var(--transition) !important;
}
.nav-cta:hover { background: #b89345 !important; }
.nav-cta::after { display: none !important; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--primary); transition: var(--transition); }

@media (max-width: 768px) {
  .navbar { padding: 0 20px; }
  .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 24px; gap: 20px; border-bottom: 1px solid var(--mid-gray); box-shadow: var(--shadow); }
  .nav-links.active { display: flex; }
  .nav-toggle { display: flex; }
  .nav-cta { text-align: center; }
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(135deg, #fafaf9 0%, #f0ede8 30%, #e8e4dd 70%, #f5f2ed 100%);
  position: relative; overflow: hidden;
  margin-top: 0;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -20%;
  width: 800px; height: 800px; border-radius: 50%;
  background: radial-gradient(circle, rgba(201,169,110,0.08) 0%, transparent 70%);
}
.hero::after {
  content: ''; position: absolute; bottom: -10%; left: -10%;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(180,160,140,0.06) 0%, transparent 70%);
}
.hero-content {
  max-width: var(--max-width); margin: 0 auto; padding: 120px 40px 80px;
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}
.hero-text h1 {
  font-size: 52px; font-weight: 700; line-height: 1.2;
  color: var(--primary); letter-spacing: 2px;
}
.hero-text h1 em { font-style: normal; color: var(--accent); }
.hero-text .subtitle {
  font-size: 18px; color: var(--dark-gray); margin-top: 20px;
  letter-spacing: 3px; font-weight: 300;
}
.hero-text .desc { font-size: 15px; color: var(--text-light); margin-top: 16px; max-width: 480px; }
.hero-btns { display: flex; gap: 16px; margin-top: 36px; }
.btn { display: inline-block; padding: 14px 36px; border-radius: var(--radius); font-size: 14px; letter-spacing: 1px; font-weight: 500; cursor: pointer; transition: all var(--transition); border: none; text-align: center; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #b89345; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-outline { border: 1px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-white { background: #fff; color: var(--primary); border: 1px solid var(--mid-gray); }
.btn-white:hover { box-shadow: var(--shadow); }

.hero-visual {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.hero-stone {
  aspect-ratio: 1; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-stone:first-child { margin-top: 20px; }
.hero-stone:last-child { margin-top: -20px; }
.stone-sample {
  width: 100%; height: 100%;
  background-size: cover; background-position: center;
}

@media (max-width: 768px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; padding: 100px 20px 60px; text-align: center; }
  .hero-text h1 { font-size: 34px; }
  .hero-text .desc { max-width: none; }
  .hero-btns { justify-content: center; flex-wrap: wrap; }
  .hero-visual { display: none; }
}

/* ===== 通用区块 ===== */
.section { padding: 100px 40px; }
.section-inner { max-width: var(--max-width); margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-label {
  font-size: 12px; letter-spacing: 4px; color: var(--accent);
  text-transform: uppercase; font-weight: 500; margin-bottom: 12px;
}
.section-title {
  font-size: 36px; font-weight: 700; letter-spacing: 2px;
  color: var(--primary);
}
.section-desc { font-size: 15px; color: var(--text-light); margin-top: 12px; max-width: 600px; margin-left: auto; margin-right: auto; }

@media (max-width: 768px) {
  .section { padding: 60px 20px; }
  .section-title { font-size: 28px; }
}

/* ===== 产品展示 ===== */
.products-section { background: var(--off-white); }
.product-cats { display: flex; justify-content: center; gap: 12px; margin-bottom: 48px; flex-wrap: wrap; }
.cat-btn {
  padding: 10px 28px; border: 1px solid var(--mid-gray); background: #fff;
  border-radius: 50px; font-size: 14px; cursor: pointer; letter-spacing: 1px;
  transition: all var(--transition); font-family: var(--font-cn);
}
.cat-btn:hover, .cat-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: all var(--transition);
  cursor: pointer; position: relative;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.product-img {
  aspect-ratio: 1; position: relative; overflow: hidden;
}
.product-img .stone-preview { width: 100%; height: 100%; }
.product-tag {
  position: absolute; top: 12px; right: 12px;
  background: var(--accent); color: #fff; font-size: 11px;
  padding: 4px 12px; border-radius: 50px; letter-spacing: 1px;
}
.product-info { padding: 20px; }
.product-info h3 { font-size: 18px; font-weight: 600; letter-spacing: 1px; }
.product-info .en-name { font-size: 12px; color: var(--gray); margin-top: 2px; font-style: italic; }
.product-info .p-desc { font-size: 13px; color: var(--text-light); margin-top: 8px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-features { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.product-features span {
  font-size: 11px; padding: 3px 10px; background: var(--light-gray);
  border-radius: 50px; color: var(--dark-gray);
}

@media (max-width: 768px) {
  .product-grid { grid-template-columns: 1fr; }
}

/* ===== 优势区块 ===== */
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.adv-card { text-align: center; padding: 40px 24px; border-radius: var(--radius); transition: all var(--transition); background: #fff; }
.adv-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.adv-icon { font-size: 40px; margin-bottom: 16px; }
.adv-card h3 { font-size: 16px; font-weight: 600; letter-spacing: 1px; margin-bottom: 8px; }
.adv-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

@media (max-width: 768px) {
  .advantages-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .adv-card { padding: 24px 16px; }
}

/* ===== 案例展示 ===== */
.cases-section { background: var(--off-white); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.case-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: all var(--transition);
  display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-img {
  aspect-ratio: 4/3; background: var(--light-gray);
  display: flex; align-items: center; justify-content: center;
  font-size: 48px; color: var(--mid-gray);
  cursor: pointer; overflow: hidden;
}
.case-img img { width: 100%; height: 100%; object-fit: cover; }
.case-info {
  padding: 24px;
  flex: 1;
  display: flex; flex-direction: column;
}
.case-info .case-cat {
  font-size: 11px; color: var(--accent); letter-spacing: 2px; text-transform: uppercase;
  cursor: pointer; display: inline-block;
}
.case-info h3 {
  font-size: 18px; font-weight: 600; margin-top: 6px;
  cursor: pointer;
}
.case-info h3:hover, .case-info .case-cat:hover { color: var(--accent); }
.case-info p {
  font-size: 13px; color: var(--text-light); margin-top: 8px; line-height: 1.6;
  flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.case-meta { display: flex; gap: 16px; margin-top: 12px; font-size: 12px; color: var(--gray); }

@media (max-width: 768px) {
  .cases-grid { grid-template-columns: 1fr; }
}

/* ===== 关于我们 ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-text h2 { font-size: 36px; font-weight: 700; letter-spacing: 2px; }
.about-text .about-content { font-size: 15px; color: var(--text-light); margin-top: 24px; line-height: 2; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 32px; }
.stat-item { text-align: center; padding: 24px; background: var(--light-gray); border-radius: var(--radius); }
.stat-num { font-size: 32px; font-weight: 700; color: var(--accent); }
.stat-label { font-size: 13px; color: var(--text-light); margin-top: 4px; }
.about-img {
  background: linear-gradient(135deg, #e8e4dd, #f0ede8);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  font-size: 120px; color: rgba(201,169,110,0.2);
  overflow: hidden;
}
.about-img img {
  width: 100%; height: auto; display: block;
  border-radius: var(--radius);
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-text h2 { font-size: 28px; }
}

/* ===== CTA区块 ===== */
.cta-section {
  background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 100%);
  color: #fff; text-align: center;
}
.cta-section .section-title { color: #fff; }
.cta-section .section-desc { color: rgba(255,255,255,0.6); }

/* ===== 联系表单 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info h3 { font-size: 20px; font-weight: 600; margin-bottom: 20px; }
.contact-item { display: flex; gap: 12px; margin-bottom: 16px; align-items: flex-start; }
.contact-icon { font-size: 20px; flex-shrink: 0; width: 28px; text-align: center; }
.contact-item .label { font-size: 12px; color: var(--gray); }
.contact-item .value { font-size: 15px; color: var(--text); }

.contact-form { background: #fff; padding: 40px; border-radius: var(--radius); box-shadow: var(--shadow); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; letter-spacing: 1px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid var(--mid-gray);
  border-radius: var(--radius); font-size: 14px; font-family: var(--font-cn);
  transition: border-color var(--transition); background: var(--off-white);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
}

/* ===== Footer ===== */
.footer {
  background: #1a1a1a; color: rgba(255,255,255,0.6);
  padding: 60px 40px 30px;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; line-height: 1.8; }
.footer-col h4 { color: #fff; font-size: 14px; letter-spacing: 2px; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13px; margin-bottom: 10px; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; text-align: center; font-size: 12px; }

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ===== 弹窗 ===== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: all var(--transition);
}
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal {
  background: #fff; border-radius: var(--radius); max-width: 800px; width: 90%;
  max-height: 90vh; overflow-y: auto; position: relative;
  padding: 0;
}
.modal-close {
  position: absolute; top: 16px; right: 16px; z-index: 10;
  width: 36px; height: 36px; border-radius: 50%; background: #fff;
  border: none; font-size: 20px; cursor: pointer; box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: center;
}
.modal-body { display: grid; grid-template-columns: 1fr 1fr; }
.modal-img { aspect-ratio: 1; background: var(--light-gray); }
.modal-detail { padding: 40px; }
.modal-detail .cat { font-size: 11px; color: var(--accent); letter-spacing: 2px; }
.modal-detail h2 { font-size: 26px; font-weight: 700; margin: 8px 0; }
.modal-detail .en { font-size: 14px; color: var(--gray); font-style: italic; margin-bottom: 16px; }
.modal-detail .desc { font-size: 14px; color: var(--text-light); line-height: 1.8; margin-bottom: 20px; }
.modal-specs { margin-bottom: 20px; }
.modal-specs h4 { font-size: 13px; letter-spacing: 2px; margin-bottom: 12px; }
.spec-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--mid-gray); font-size: 13px; }
.spec-row .spec-label { color: var(--gray); }
.modal-features { display: flex; gap: 8px; flex-wrap: wrap; }
.modal-features span { font-size: 12px; padding: 6px 14px; background: var(--light-gray); border-radius: 50px; }
.modal-cta { display: inline-block; margin-top: 24px; }

@media (max-width: 768px) {
  .modal-body { grid-template-columns: 1fr; }
  .modal-detail { padding: 24px; }
}

/* ===== Toast ===== */
.toast {
  position: fixed; top: 24px; right: 24px; z-index: 3000;
  padding: 14px 24px; border-radius: var(--radius); color: #fff; font-size: 14px;
  transform: translateX(120%); transition: transform var(--transition);
  box-shadow: var(--shadow);
}
.toast.show { transform: translateX(0); }
.toast.success { background: #4caf50; }
.toast.error { background: #f44336; }

/* ===== 加载动画 ===== */
.loading { text-align: center; padding: 40px; color: var(--gray); }
.spinner {
  width: 32px; height: 32px; border: 3px solid var(--mid-gray);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 0.8s linear infinite; margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 石材纹理CSS模拟 ===== */
.stone-quartz-1 { background: linear-gradient(135deg, #f5f0e8 0%, #ede6d8 30%, #f0ebe0 60%, #e8e0d2 100%); }
.stone-quartz-2 { background: linear-gradient(45deg, #2a2a2a 0%, #1a1a1a 40%, #333 70%, #222 100%); position: relative; }
.stone-quartz-2::after { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.05) 0%, transparent 50%), radial-gradient(circle at 70% 60%, rgba(255,255,255,0.08) 0%, transparent 40%); }
.stone-quartz-3 { background: linear-gradient(160deg, #fafaf8 0%, #f2efe8 30%, #f8f6f2 60%, #efe9e0 100%); position: relative; }
.stone-quartz-3::after { content: ''; position: absolute; inset: 0; background: repeating-linear-gradient(45deg, transparent, transparent 40px, rgba(180,170,155,0.1) 40px, rgba(180,170,155,0.1) 42px); }
.stone-quartz-4 { background: linear-gradient(135deg, #c8c4bc 0%, #b8b4ac 25%, #ccc8c0 50%, #bfbab2 75%, #d0ccc4 100%); }
.stone-quartz-5 { background: linear-gradient(135deg, #f5ecd8 0%, #ede0c0 30%, #f0e8d0 60%, #e8dcc0 100%); position: relative; }
.stone-quartz-5::after { content: ''; position: absolute; inset: 0; background: linear-gradient(45deg, transparent 40%, rgba(201,169,110,0.08) 40%, rgba(201,169,110,0.08) 42%, transparent 42%); }
.stone-quartz-6 { background: linear-gradient(180deg, #fefefe 0%, #fafafa 50%, #f5f5f5 100%); }
.stone-solid-1 { background: linear-gradient(135deg, #fafaf8 0%, #f5f5f0 50%, #fafaf8 100%); }
.stone-solid-2 { background: linear-gradient(135deg, #f8f5ed 0%, #f3efe5 30%, #faf7f0 60%, #f0ebe0 100%); position: relative; }
.stone-solid-2::after { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 40% 50%, rgba(200,180,150,0.1) 0%, transparent 60%); }
.stone-solid-3 { background: linear-gradient(135deg, #fdf5e6 0%, #faf0d7 30%, #fef8ed 60%, #f5e8c8 100%); }
.stone-sintered-1 { background: linear-gradient(135deg, #f8f6f2 0%, #efe9e0 30%, #f5f1ea 60%, #e8e0d5 100%); position: relative; }
.stone-sintered-1::after { content: ''; position: absolute; inset: 0; background: linear-gradient(120deg, transparent 30%, rgba(150,140,120,0.06) 30%, rgba(150,140,120,0.06) 32%, transparent 32%), linear-gradient(200deg, transparent 60%, rgba(160,150,130,0.04) 60%, rgba(160,150,130,0.04) 62%, transparent 62%); }
.stone-sintered-2 { background: linear-gradient(160deg, #b8b4ac 0%, #a8a49c 25%, #c0bcb4 50%, #b0aca4 75%, #c8c4bc 100%); }
.stone-sintered-3 { background: linear-gradient(135deg, #f0ece4 0%, #e8e0d5 30%, #f2eee6 60%, #e5dcd0 100%); position: relative; }
.stone-sintered-3::after { content: ''; position: absolute; inset: 0; background: linear-gradient(45deg, transparent 25%, rgba(180,160,140,0.08) 25%, rgba(180,160,140,0.08) 27%, transparent 27%), linear-gradient(135deg, transparent 55%, rgba(180,160,140,0.06) 55%, rgba(180,160,140,0.06) 57%, transparent 57%); }