/* ===== CoreSwift - Warm Edition v3 ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=DM+Serif+Display:ital@0;1&display=swap');

:root {
  /* 暖色深色调色板 — 2026版 */
  --bg-dark: #1a1410;
  --bg-card: #231c16;
  --bg-card-hover: #2d241e;
  --bg-section: #1e1814;
  --bg-warm: #221c18;

  --accent: #e8874a;
  --accent-hover: #d4763a;
  --accent-glow: rgba(232, 135, 74, 0.12);
  --accent-soft: #3d2a1e;
  --gold: #c8963e;

  --text: #f5ede6;
  --text-muted: #b8a89a;
  --text-dim: #8a7a6e;

  --border: #3a3028;
  --border-light: #4a3e34;

  --font-body: 'Inter', -apple-system, sans-serif;
  --font-display: 'DM Serif Display', Georgia, serif;
  --radius: 6px;
  --radius-lg: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航栏 ===== */
nav {
  position: fixed; top: 0; width: 100%; z-index: 1000;
  background: rgba(26, 20, 16, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
nav.scrolled { border-color: var(--border); background: rgba(26, 20, 16, 0.96); }
nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo-wrap { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.logo-img { height: 34px; width: auto; }
.logo-divider { width: 1px; height: 24px; background: var(--border); }
.logo-text-side { display: flex; flex-direction: column; }
.logo-brand { font-family: var(--font-display); font-size: 1.1rem; color: var(--text); line-height: 1.2; letter-spacing: -0.3px; }
.logo-tagline { font-size: 0.58rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1.8px; font-weight: 500; }

.nav-links { display: flex; gap: 4px; list-style: none; align-items: center; }
.nav-links a {
  text-decoration: none; color: var(--text-muted);
  font-size: 0.82rem; font-weight: 500;
  padding: 8px 14px; border-radius: 6px;
  transition: all 0.2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.03); }
.nav-links a.active { color: var(--accent); }
.nav-links .btn {
  padding: 9px 20px; background: var(--accent); color: #fff;
  border-radius: 6px; font-weight: 600; font-size: 0.8rem; letter-spacing: 0.3px;
}
.nav-links .btn:hover { background: var(--accent-hover); color: #fff; }

.nav-social { padding: 8px !important; opacity: 0.5; transition: opacity 0.2s; line-height: 1; }
.nav-social:hover { opacity: 1 !important; background: transparent !important; }
.nav-social svg { display: block; }

.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.mobile-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s; }

/* ===== Hero ===== */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(180deg, #1a1410 0%, #221a14 40%, var(--bg-dark) 100%);
  position: relative;
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero-bg { position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 0; pointer-events: none; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; object-position: center bottom; }
.hero-bg-overlay { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: linear-gradient(180deg, rgba(26,20,16,0.4) 0%, rgba(26,20,16,0.2) 40%, var(--bg-dark) 85%, var(--bg-dark) 100%); z-index: 1; }

.hero-accent-bar { position: absolute; bottom: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, transparent, var(--accent), transparent); }
.hero-content { position: relative; z-index: 2; max-width: 880px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px;
  border: 1px solid rgba(232, 135, 74, 0.2);
  border-radius: 100px;
  font-size: 0.7rem; font-weight: 500;
  color: var(--accent);
  text-transform: uppercase; letter-spacing: 1.5px;
  margin-bottom: 28px;
}
.hero-badge-dot { width: 5px; height: 5px; background: var(--accent); border-radius: 50%; }

.hero h1 {
  font-family: var(--font-display);
  font-size: 3.4rem;
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 28px;
  letter-spacing: -1px;
}
.hero h1 .highlight { color: var(--accent); font-style: italic; }

.hero-sub {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 650px;
  margin-bottom: 36px;
  line-height: 1.8;
  border-left: 3px solid var(--accent);
  padding-left: 24px;
}

.hero-cta-row { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.hero-trust-row { display: flex; gap: 24px; align-items: center; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border); }
.hero-trust-item { display: flex; align-items: center; gap: 10px; font-size: 0.75rem; color: var(--text-dim); font-weight: 500; }
.hero-trust-item svg { width: 20px; height: 20px; flex-shrink: 0; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 30px; background: var(--accent); color: #fff;
  text-decoration: none; border-radius: 6px;
  font-weight: 600; font-size: 0.88rem;
  transition: all 0.2s; border: none; cursor: pointer;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,135,74,0.25); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 30px; border: 1px solid rgba(255,255,255,0.1);
  color: var(--text); text-decoration: none; border-radius: 6px;
  font-weight: 500; font-size: 0.88rem; transition: all 0.2s;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); background: rgba(232,135,74,0.04); }

/* ===== 通用区块 ===== */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-section); }

.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 2px;
  color: var(--accent); font-weight: 600; margin-bottom: 14px;
}
.section-label::before { content: ''; width: 20px; height: 2px; background: var(--accent); }

.section-title {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.section-sub {
  color: var(--text-muted);
  max-width: 700px;
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 48px;
}

.section-divider { width: 100%; height: 1px; background: linear-gradient(90deg, transparent, var(--border), transparent); }

/* ===== 产品 ===== */
.products-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.product-card {
  position: relative; border-radius: var(--radius-lg);
  overflow: hidden; transition: all 0.4s;
  min-height: 320px; display: flex; align-items: flex-end;
  cursor: pointer; border: 1px solid var(--border);
}
.product-card:hover { transform: translateY(-4px); border-color: rgba(232,135,74,0.15); box-shadow: 0 12px 40px rgba(0,0,0,0.5); }

.product-card-main {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 12px;
}

.preview-icon { width: 56px; height: 56px; border-radius: 50%; background: rgba(255,255,255,0.05); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; backdrop-filter: blur(4px); transition: all 0.3s; }
.product-card:hover .preview-icon { background: var(--accent); transform: scale(1.1); }
.preview-label { font-size: 0.72rem; color: rgba(255,255,255,0.35); letter-spacing: 1px; text-transform: uppercase; }

.product-card-content { position: relative; z-index: 2; padding: 24px 22px; width: 100%; background: linear-gradient(0deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.3) 60%, transparent 100%); }
.product-card-content h4 { font-family: var(--font-display); font-size: 1.15rem; color: #fff; margin-bottom: 4px; }
.product-card-content p { font-size: 0.82rem; color: rgba(255,255,255,0.5); line-height: 1.5; margin-bottom: 10px; }

.product-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.product-tags span { padding: 3px 10px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.05); border-radius: 100px; font-size: 0.65rem; color: rgba(255,255,255,0.6); }

.pcard-mining { background: linear-gradient(145deg, #0c1a1e, #1c342e, #0e1210); }
.pcard-granny { background: linear-gradient(145deg, #0e1e14, #203a2a, #0e1410); }
.pcard-cabin { background: linear-gradient(145deg, #1a140a, #2e2416, #12100a); }
.pcard-custom { background: linear-gradient(145deg, #101018, #1e1e2e, #0e0e14); }

/* ===== 认证 ===== */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cert-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px 22px 22px; text-align: center; transition: all 0.3s; }
.cert-card:hover { border-color: rgba(232,135,74,0.1); background: var(--bg-card-hover); transform: translateY(-2px); }
.cert-icon-wrap { width: 44px; height: 44px; margin: 0 auto 14px; background: rgba(232,135,74,0.05); border-radius: 12px; display: flex; align-items: center; justify-content: center; }
.cert-card h4 { font-size: 0.92rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.cert-card p { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }
.cert-badge-sm { display: inline-block; padding: 2px 10px; background: rgba(232,135,74,0.03); border: 1px solid rgba(232,135,74,0.08); border-radius: 100px; font-size: 0.64rem; color: var(--accent); margin-top: 10px; }

/* ===== Truth ===== */
.truth-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.truth-visual-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px 32px; position: relative; overflow: hidden; }
.truth-visual-box::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent), transparent); }
.truth-quote { font-family: var(--font-display); font-size: 1.3rem; line-height: 1.4; color: var(--text); margin-bottom: 24px; font-style: italic; }
.truth-author { display: flex; align-items: center; gap: 12px; padding-top: 20px; border-top: 1px solid var(--border); }
.truth-author-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--accent-glow); border: 1px solid rgba(232,135,74,0.1); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; }
.truth-author-name { font-weight: 600; font-size: 0.85rem; }
.truth-author-title { font-size: 0.76rem; color: var(--text-dim); }
.truth-content h3 { font-family: var(--font-display); font-size: 1.6rem; line-height: 1.3; margin-bottom: 18px; }
.truth-content p { color: var(--text-muted); margin-bottom: 14px; line-height: 1.8; font-size: 0.92rem; }
.truth-highlight { padding: 18px 22px; background: rgba(232,135,74,0.02); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; margin-top: 20px; font-size: 0.92rem; color: var(--text); line-height: 1.7; }

/* ===== 方法论 ===== */
.steps-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.step-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px 26px; transition: all 0.3s; position: relative; overflow: hidden; }
.step-card:hover { border-color: rgba(232,135,74,0.1); background: var(--bg-card-hover); transform: translateY(-3px); }
.step-card::before { content: ''; position: absolute; top: 0; left: 0; width: 3px; height: 100%; background: linear-gradient(180deg, var(--accent), transparent); opacity: 0.2; }
.step-emoji { font-size: 1.8rem; margin-bottom: 12px; }
.step-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.step-card p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.7; }

/* ===== Process ===== */
.process-steps { max-width: 800px; }
.process-step { display: flex; gap: 24px; align-items: flex-start; }
.process-number { font-family: var(--font-display); font-size: 1.6rem; color: var(--accent); opacity: 0.2; min-width: 40px; line-height: 1; }
.process-step-content h4 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.process-step-content p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 18px; }
.process-connector { width: 1px; height: 18px; background: var(--border); margin-left: 19px; }

/* ===== Hub ===== */
.hub-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.hub-content h3 { font-family: var(--font-display); font-size: 1.6rem; line-height: 1.3; margin-bottom: 18px; }
.hub-content p { color: var(--text-muted); margin-bottom: 14px; line-height: 1.8; font-size: 0.92rem; }
.hub-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; }
.hub-tag { padding: 5px 12px; background: rgba(232,135,74,0.03); border: 1px solid rgba(232,135,74,0.08); border-radius: 100px; font-size: 0.72rem; color: var(--accent); font-weight: 500; }
.hub-visual { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px 32px; text-align: center; }
.hub-visual-icon { font-size: 3.2rem; margin-bottom: 16px; }
.hub-visual h4 { font-family: var(--font-display); font-size: 1.2rem; margin-bottom: 6px; }
.hub-visual p { color: var(--text-dim); font-size: 0.84rem; }

/* ===== Founder ===== */
.founder-grid { display: grid; grid-template-columns: 260px 1fr; gap: 64px; align-items: start; }
.founder-photo { width: 260px; height: 320px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 12px; color: var(--text-dim); font-size: 0.82rem; position: relative; overflow: hidden; }
.founder-photo-icon { font-size: 3.2rem; opacity: 0.2; }
.founder-note h3 { font-family: var(--font-display); font-size: 1.6rem; line-height: 1.3; margin-bottom: 20px; }
.founder-note p { color: var(--text-muted); margin-bottom: 14px; line-height: 1.8; font-size: 0.92rem; }
.founder-note .highlight-text { padding: 18px 22px; background: rgba(232,135,74,0.02); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; margin-top: 20px; font-size: 0.92rem; color: var(--text); line-height: 1.7; }

/* ===== About ===== */
.about-hero { padding: 140px 0 80px; background: linear-gradient(180deg, #1a1410 0%, #221a14 40%, var(--bg-dark) 100%); position: relative; overflow: hidden; }
.about-bg { position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 0; pointer-events: none; }
.about-bg img { width: 100%; height: 100%; object-fit: cover; object-position: center bottom; }
.about-bg-overlay { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: linear-gradient(180deg, rgba(26,20,16,0.5) 0%, rgba(26,20,16,0.2) 50%, var(--bg-dark) 100%); z-index: 1; }
.about-hero-content { position: relative; z-index: 2; }
.about-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin: 60px 0; }
.about-stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 36px 24px; text-align: center; }
.about-stat-number { font-family: var(--font-display); font-size: 2.4rem; color: var(--accent); margin-bottom: 8px; }
.about-stat-label { font-size: 0.82rem; color: var(--text-dim); }

/* Story */
.story-section { padding: 80px 0; }
.story-timeline { position: relative; max-width: 800px; margin: 0 auto; }
.story-timeline::before { content: ''; position: absolute; left: 24px; top: 0; bottom: 0; width: 1px; background: linear-gradient(180deg, var(--accent), transparent); opacity: 0.15; }
.story-item { display: flex; gap: 32px; margin-bottom: 48px; position: relative; }
.story-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); opacity: 0.35; margin-top: 4px; flex-shrink: 0; position: relative; left: 18px; }
.story-content h3 { font-family: var(--font-display); font-size: 1.2rem; color: var(--text); margin-bottom: 8px; }
.story-content h3 span { color: var(--accent); font-size: 0.8rem; display: block; font-family: var(--font-body); font-weight: 400; margin-top: 2px; }
.story-content p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.8; }

/* Trust */
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 60px 0; }
.trust-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 32px 20px; text-align: center; }
.trust-number { font-family: var(--font-display); font-size: 2.8rem; color: var(--accent); line-height: 1; margin-bottom: 8px; }
.trust-label { font-size: 0.8rem; color: var(--text-dim); line-height: 1.4; }
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 40px 0; }
.about-value-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 28px 24px; }
.about-value-card .icon { font-size: 1.8rem; margin-bottom: 12px; }
.about-value-card h4 { font-size: 1rem; margin-bottom: 8px; }
.about-value-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
.contact-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px 28px; }
.contact-title { font-family: var(--font-display); font-size: 1.15rem; margin-bottom: 4px; }
.contact-subtitle { color: var(--text-dim); font-size: 0.82rem; margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.contact-detail { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.contact-detail:last-of-type { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.contact-icon-wrap { width: 38px; height: 38px; background: rgba(232,135,74,0.05); border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-icon-wrap svg { width: 16px; height: 16px; stroke: var(--accent); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.contact-detail .label { font-size: 0.65rem; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; display: block; margin-bottom: 1px; }
.contact-detail .value { font-size: 0.85rem; color: var(--text); font-weight: 500; }
.contact-social-row { display: flex; gap: 8px; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); }
.contact-social-btn { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; text-decoration: none; color: var(--text-muted); font-size: 0.78rem; font-weight: 600; transition: all 0.2s; }
.contact-social-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(232,135,74,0.03); }

.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: 13px 16px; background: rgba(255,255,255,0.02); border: 1px solid var(--border); border-radius: 6px; font-family: var(--font-body); font-size: 0.85rem; color: var(--text); margin-bottom: 14px; transition: border-color 0.2s; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: var(--accent); }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: var(--text-dim); }
.contact-form select { -webkit-appearance: none; appearance: none; cursor: pointer; }
.contact-form textarea { height: 110px; resize: vertical; }
.contact-form button { width: 100%; padding: 14px; background: var(--accent); color: #fff; border: none; border-radius: 6px; font-size: 0.9rem; font-weight: 600; font-family: var(--font-body); cursor: pointer; transition: all 0.2s; }
.contact-form button:hover { background: var(--accent-hover); transform: translateY(-1px); }

/* ===== Footer ===== */
footer { padding: 56px 0 28px; border-top: 1px solid var(--border); }
footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 40px; }
.footer-left { max-width: 340px; }
.footer-logo-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.footer-logo-row img { height: 30px; width: auto; }
.footer-brand-name { font-family: var(--font-display); font-size: 1rem; color: var(--text); }
.footer-left p { font-size: 0.8rem; color: var(--text-dim); line-height: 1.7; }
.footer-right { display: flex; gap: 48px; }
.footer-col h4 { font-size: 0.68rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-dim); margin-bottom: 14px; }
.footer-col a { display: block; color: var(--text-muted); text-decoration: none; font-size: 0.82rem; margin-bottom: 8px; transition: color 0.2s; }
.footer-col a:hover { color: var(--text); }
.footer-social-row { display: flex; gap: 10px; margin-top: 18px; }
.footer-social-btn { width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; text-decoration: none; color: var(--text-muted); font-size: 0.72rem; font-weight: 600; transition: all 0.2s; }
.footer-social-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(232,135,74,0.03); }
.footer-bottom { width: 100%; text-align: center; padding-top: 28px; margin-top: 28px; border-top: 1px solid var(--border); font-size: 0.72rem; color: var(--text-dim); }

/* ===== 动画 ===== */
/* ===== Back to Top ===== */
.back-to-top {
  position: fixed; bottom: 30px; right: 30px;
  width: 48px; height: 48px;
  background: var(--accent); color: #fff;
  border: none; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; z-index: 9999;
  opacity: 0; visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s;
  box-shadow: 0 4px 16px rgba(232,135,74,0.3);
}

.back-to-top.visible {
  opacity: 1; visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(232,135,74,0.4);
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.92);
  z-index: 10000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: all 0.3s;
}

.lightbox.active { opacity: 1; visibility: visible; }

.lightbox-img {
  max-width: 90vw; max-height: 85vh;
  border-radius: 8px;
  transform: scale(0.9);
  transition: transform 0.3s;
}

.lightbox.active .lightbox-img { transform: scale(1); }

.lightbox-close {
  position: absolute; top: 24px; right: 32px;
  font-size: 2rem; color: #fff; cursor: pointer;
  opacity: 0.7; transition: opacity 0.2s;
}

.lightbox-close:hover { opacity: 1; }

.lightbox-caption {
  position: absolute; bottom: 24px; left: 0; right: 0;
  text-align: center; color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
}

/* ===== Animations (enhanced) ===== */
.animate-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.animate-in.visible { opacity: 1; transform: translateY(0); }

/* Stagger */
[data-stagger] .animate-in:nth-child(2) { transition-delay: 0.1s; }
[data-stagger] .animate-in:nth-child(3) { transition-delay: 0.2s; }
[data-stagger] .animate-in:nth-child(4) { transition-delay: 0.3s; }

/* ===== Product Detail ===== */
.pd-section { padding: 140px 0 60px; background: var(--bg-section); }
.pd-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.pd-specs-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 24px 0; }
.pd-specs-list li { padding: 12px 16px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; font-size: 0.85rem; color: var(--text); }
.pd-specs-list li::before { content: '✓ '; color: var(--accent); font-weight: 600; }
.pd-certs { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.pd-certs .product-tag { padding: 6px 14px; background: rgba(232,135,74,0.03); border: 1px solid rgba(232,135,74,0.08); border-radius: 100px; font-size: 0.72rem; color: var(--accent); font-weight: 500; }
.pd-gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 32px 0; }
.pd-nav { display: flex; gap: 16px; justify-content: space-between; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border); }

/* ===== Mobile 768 ===== */
@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .nav-links { position: fixed; top: 72px; left: 0; width: 100%; background: rgba(26,20,16,0.98); backdrop-filter: blur(16px); flex-direction: column; padding: 16px; gap: 4px; border-bottom: 1px solid var(--border); display: none; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; width: 100%; }
  .nav-links .btn { width: 100%; text-align: center; }
  .hero { padding: 120px 0 60px; min-height: auto; }
  .hero h1 { font-size: 2rem; }
  .hero-sub { font-size: 0.9rem; padding-left: 16px; }
  .hero-trust-row { flex-wrap: wrap; gap: 16px; }
  .hero-cta-row .btn-primary, .hero-cta-row .btn-secondary { width: 100%; justify-content: center; }
  .section { padding: 64px 0; }
  .section-title { font-size: 1.6rem; }
  .products-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .truth-grid, .hub-grid, .founder-grid, .contact-grid, .pd-grid, .about-content-grid { grid-template-columns: 1fr; gap: 32px; }
  .steps-grid { grid-template-columns: 1fr; }
  .pd-gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .pd-specs-list { grid-template-columns: 1fr; }
  .pd-nav { flex-direction: column; gap: 12px; }
  .pd-nav .btn-primary, .pd-nav .btn-secondary { width: 100%; justify-content: center; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .about-stats { grid-template-columns: 1fr; }
  .about-values { grid-template-columns: 1fr; }
  .footer-right { flex-direction: column; gap: 24px; }
}

/* ===== Mobile 480 ===== */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.6rem; letter-spacing: -0.3px; }
  .hero-sub { font-size: 0.85rem; padding-left: 12px; margin-bottom: 24px; }
  .cert-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }
  .pd-gallery-grid { grid-template-columns: 1fr; }
  .story-item { gap: 20px; }
  .story-timeline::before { left: 16px; }
  .story-dot { width: 10px; height: 10px; left: 11px; }
}