/* =============================================
   聚鑫印刷 企业官网 - 主样式
   ============================================= */

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

:root {
  --primary: #C8102E;        /* 影院红 */
  --primary-dark: #A00D24;
  --primary-light: #FF2E4C;
  --gold: #F5A623;
  --dark: #0D0D0D;
  --dark-2: #141414;
  --dark-3: #1E1E1E;
  --dark-4: #2A2A2A;
  --gray: #888;
  --gray-light: #E8E8E8;
  --white: #FFFFFF;
  --text: #1A1A1A;
  --text-muted: #666;
  --section-bg: #F8F8F8;
  --font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0,0,0,0.10);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); color: var(--text); background: var(--white); overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ===== NAV ===== */
.nav-wrap {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(13,13,13,0.92); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}
.nav-wrap.scrolled { background: rgba(13,13,13,0.98); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 24px; }
.logo-text { font-size: 20px; font-weight: 700; color: var(--white); letter-spacing: 1px; }
.logo-sub { font-size: 11px; color: rgba(255,255,255,0.4); border-left: 1px solid rgba(255,255,255,0.15); padding-left: 10px; margin-left: 4px; line-height: 1.3; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a { color: rgba(255,255,255,0.75); font-size: 14px; padding: 8px 14px; border-radius: 8px; transition: var(--transition); }
.nav-links a:hover { color: var(--white); background: rgba(255,255,255,0.08); }
.nav-links .nav-cta { background: var(--primary); color: var(--white); font-weight: 600; padding: 9px 20px; }
.nav-links .nav-cta:hover { background: var(--primary-light); }
.menu-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }
.mobile-menu { display: none; flex-direction: column; padding: 12px 20px 16px; border-top: 1px solid rgba(255,255,255,0.08); }
.mobile-menu a { color: rgba(255,255,255,0.8); padding: 12px 0; font-size: 15px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.mobile-menu.open { display: flex; }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; background: var(--dark);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  position: relative; overflow: hidden; padding-top: 68px;
}
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.particle { position: absolute; border-radius: 50%; background: var(--primary); opacity: 0.15; animation: float linear infinite; }
@keyframes float {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 0.15; }
  90% { opacity: 0.15; }
  100% { transform: translateY(-100px) scale(1); opacity: 0; }
}
.hero-content { position: relative; z-index: 2; text-align: center; padding: 60px 0; }
.hero-badge {
  display: inline-block; background: rgba(200,16,46,0.15); border: 1px solid rgba(200,16,46,0.35);
  color: #FF6680; font-size: 13px; padding: 6px 18px; border-radius: 100px;
  margin-bottom: 28px; letter-spacing: 1px;
}
.hero-title {
  font-size: clamp(38px, 6vw, 68px); font-weight: 900; color: var(--white);
  line-height: 1.15; margin-bottom: 24px; letter-spacing: -1px;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary-light), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc { font-size: clamp(15px, 2vw, 18px); color: rgba(255,255,255,0.6); line-height: 1.8; margin-bottom: 40px; }
.br-desktop { display: none; }
@media (min-width: 768px) { .br-desktop { display: block; } }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }
.btn-primary {
  background: var(--primary); color: var(--white); font-size: 16px; font-weight: 700;
  padding: 16px 36px; border-radius: var(--radius); display: inline-flex; align-items: center;
  gap: 8px; transition: var(--transition); box-shadow: 0 0 30px rgba(200,16,46,0.35);
}
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 40px rgba(200,16,46,0.5); }
.btn-secondary {
  background: rgba(255,255,255,0.07); color: rgba(255,255,255,0.85); font-size: 16px; font-weight: 600;
  padding: 16px 36px; border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.15);
  display: inline-flex; align-items: center; gap: 8px; transition: var(--transition);
}
.btn-secondary:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); }
.hero-stats { display: flex; align-items: center; justify-content: center; gap: 0; flex-wrap: wrap; }
.stat-item { text-align: center; padding: 0 40px; }
.stat-num { display: block; font-size: clamp(28px, 4vw, 44px); font-weight: 900; color: var(--white); line-height: 1.1; }
.stat-unit { font-size: 0.5em; color: var(--primary-light); }
.stat-label { display: block; font-size: 12px; color: rgba(255,255,255,0.4); margin-top: 4px; letter-spacing: 1px; }
.stat-divider { width: 1px; height: 48px; background: rgba(255,255,255,0.1); }
.hero-scroll-hint { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); text-align: center; color: rgba(255,255,255,0.3); font-size: 12px; }
.scroll-arrow { width: 20px; height: 20px; border-right: 2px solid rgba(255,255,255,0.2); border-bottom: 2px solid rgba(255,255,255,0.2); transform: rotate(45deg); margin: 8px auto 0; animation: bounce 1.5s infinite; }
@keyframes bounce { 0%,100%{transform:rotate(45deg) translateY(0)} 50%{transform:rotate(45deg) translateY(4px)} }

/* ===== SECTION HEADER ===== */
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
  display: inline-block; background: rgba(200,16,46,0.08); border: 1px solid rgba(200,16,46,0.2);
  color: var(--primary); font-size: 12px; font-weight: 600; padding: 5px 16px;
  border-radius: 100px; margin-bottom: 16px; letter-spacing: 2px; text-transform: uppercase;
}
.section-tag.light { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.15); color: rgba(255,255,255,0.6); }
.section-title { font-size: clamp(26px, 4vw, 40px); font-weight: 800; color: var(--text); line-height: 1.3; margin-bottom: 16px; }
.section-title.white { color: var(--white); }
.section-desc { font-size: 16px; color: var(--text-muted); }
.section-desc.white { color: rgba(255,255,255,0.55); }
.red { color: var(--primary); }
.highlight { color: var(--primary); }
.gold { color: var(--gold); }
.white { color: var(--white); }

/* ===== PAIN SECTION ===== */
.pain-section { padding: 100px 0; background: var(--white); }
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 40px; }
@media (max-width: 900px) { .pain-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px) { .pain-grid { grid-template-columns: 1fr; } }
.pain-card {
  background: var(--section-bg); border: 1px solid #EDEDED; border-radius: var(--radius-lg);
  padding: 32px 28px; position: relative; overflow: hidden; transition: var(--transition);
}
.pain-card::before {
  content: attr(data-index); position: absolute; right: 20px; top: 16px;
  font-size: 52px; font-weight: 900; color: rgba(0,0,0,0.04); line-height: 1;
}
.pain-card:hover { border-color: var(--primary); box-shadow: 0 8px 40px rgba(200,16,46,0.10); transform: translateY(-4px); }
.pain-icon { font-size: 36px; margin-bottom: 16px; }
.pain-card h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.pain-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.pain-loss { font-size: 13px; color: var(--primary); font-weight: 600; background: rgba(200,16,46,0.06); padding: 6px 12px; border-radius: 6px; display: inline-block; }
.pain-conclusion {
  background: linear-gradient(135deg, #FFF8F9, #FFF3D6);
  border: 1px solid rgba(200,16,46,0.15); border-radius: var(--radius-lg); padding: 28px 36px;
}
.pain-conclusion-inner { display: flex; align-items: center; gap: 20px; }
.pain-q-icon { font-size: 32px; flex-shrink: 0; }
.pain-conclusion p { font-size: 16px; color: var(--text); line-height: 1.7; }

/* ===== PRODUCTS SECTION ===== */
.products-section { padding: 100px 0; background: var(--dark); }
.products-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 700px) { .products-grid { grid-template-columns: 1fr; } }
.product-card {
  background: var(--dark-3); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg); padding: 36px 32px; position: relative;
  transition: var(--transition);
}
.product-card:hover { border-color: rgba(200,16,46,0.4); transform: translateY(-4px); box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.product-card.featured { border-color: rgba(200,16,46,0.35); background: linear-gradient(135deg, rgba(200,16,46,0.08), rgba(30,30,30,1)); }
.product-badge {
  position: absolute; top: -1px; right: 24px;
  background: var(--primary); color: var(--white); font-size: 11px; font-weight: 700;
  padding: 5px 14px; border-radius: 0 0 10px 10px; letter-spacing: 1px;
}
.product-icon-wrap { margin-bottom: 20px; }
.product-icon { font-size: 40px; }
.product-card h3 { font-size: 22px; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.product-desc { font-size: 14px; color: rgba(255,255,255,0.55); line-height: 1.7; margin-bottom: 20px; }
.product-features { list-style: none; margin-bottom: 28px; }
.product-features li { font-size: 14px; color: rgba(255,255,255,0.7); padding: 6px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
.product-features li:last-child { border-bottom: none; }
.product-btn {
  display: inline-block; background: var(--primary); color: var(--white); font-size: 14px;
  font-weight: 600; padding: 12px 24px; border-radius: var(--radius); transition: var(--transition);
}
.product-btn:hover { background: var(--primary-light); }
.product-card:not(.featured) .product-btn { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); }
.product-card:not(.featured) .product-btn:hover { background: var(--primary); border-color: var(--primary); }

/* ===== ADVANTAGES SECTION ===== */
.advantages-section { padding: 100px 0; background: var(--section-bg); }
.adv-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
@media (max-width: 800px) { .adv-layout { grid-template-columns: 1fr; } }
.adv-list { display: flex; flex-direction: column; gap: 4px; }
.adv-item {
  display: flex; align-items: center; gap: 16px;
  padding: 20px 20px; border-radius: var(--radius); cursor: pointer;
  border: 1px solid transparent; transition: var(--transition);
}
.adv-item:hover, .adv-item.active { background: var(--white); border-color: var(--primary); box-shadow: var(--shadow); }
.adv-num { font-size: 24px; font-weight: 900; color: var(--gray-light); min-width: 36px; transition: var(--transition); }
.adv-item.active .adv-num { color: var(--primary); }
.adv-text { flex: 1; }
.adv-text h4 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.adv-text p { font-size: 13px; color: var(--text-muted); }
.adv-arrow { color: var(--gray-light); font-size: 18px; transition: var(--transition); }
.adv-item.active .adv-arrow { color: var(--primary); }

.adv-display { position: relative; }
.adv-panel {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 44px 40px; border: 1px solid #EDEDED;
  box-shadow: var(--shadow); display: none;
}
.adv-panel.active { display: block; animation: fadeIn 0.35s ease; }
@keyframes fadeIn { from{opacity:0;transform:translateY(8px)} to{opacity:1;transform:none} }
.adv-panel-icon { font-size: 44px; margin-bottom: 20px; }
.adv-panel h3 { font-size: 24px; font-weight: 800; color: var(--text); margin-bottom: 16px; }
.adv-panel p { font-size: 15px; color: var(--text-muted); line-height: 1.8; }
.adv-metric { margin-top: 24px; display: flex; flex-direction: column; gap: 10px; }
.metric-bar { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-muted); }
.metric-bar > span:first-child { min-width: 80px; }
.bar { flex: 1; height: 8px; background: var(--gray-light); border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-light)); border-radius: 4px; transition: width 0.8s ease; }
.bar-fill.gray { background: linear-gradient(90deg, #CCC, #E0E0E0); }
.metric-val { min-width: 50px; font-weight: 700; color: var(--text); font-size: 13px; }
.adv-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tag { background: rgba(200,16,46,0.07); border: 1px solid rgba(200,16,46,0.15); color: var(--primary); font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 100px; }

/* ===== CASES SECTION ===== */
.cases-section { padding: 100px 0; background: var(--dark-2); }
.cases-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
@media (max-width: 700px) { .cases-grid { grid-template-columns: 1fr; } }
.case-card {
  background: var(--dark-3); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg); padding: 32px 28px; transition: var(--transition);
}
.case-card:hover { border-color: var(--gold); transform: translateY(-4px); }
.case-type { font-size: 14px; font-weight: 700; color: var(--gold); margin-bottom: 16px; }
.case-body p { font-size: 15px; color: rgba(255,255,255,0.65); line-height: 1.7; margin-bottom: 24px; }
.case-body strong { color: var(--white); }
.case-metrics { display: flex; gap: 24px; }
.case-metric { text-align: center; }
.case-num { display: block; font-size: 32px; font-weight: 900; color: var(--white); }
.case-num.red { color: var(--primary-light); }
.case-label { display: block; font-size: 12px; color: rgba(255,255,255,0.35); margin-top: 4px; }

/* ===== COMPARE SECTION ===== */
.compare-section { padding: 100px 0; background: var(--white); }
.compare-table-wrap { overflow-x: auto; margin-top: 16px; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.compare-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.compare-table th, .compare-table td { padding: 18px 24px; text-align: left; border-bottom: 1px solid #F0F0F0; }
.compare-table thead th { font-size: 14px; font-weight: 700; letter-spacing: 1px; }
.compare-table thead th:first-child { background: #F8F8F8; color: var(--text); }
.compare-table thead .col-bad { background: #FFF0F0; color: #C0392B; }
.compare-table thead .col-good { background: #0A1628; color: var(--white); }
.compare-table tbody tr:hover { background: #FAFAFA; }
.compare-table td:first-child { font-weight: 600; color: var(--text); }
.compare-table .col-bad { color: #B0303A; background: #FFF9F9; font-size: 14px; }
.compare-table .col-good { color: #1A5C3A; background: #F0FFF6; font-size: 14px; font-weight: 600; }
.compare-table tbody tr:last-child td { border-bottom: none; }

/* ===== CONTACT SECTION ===== */
.contact-section { padding: 100px 0; background: var(--dark); }
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
@media (max-width: 900px) { .contact-wrap { grid-template-columns: 1fr; gap: 40px; } }
.contact-title { font-size: clamp(28px, 3.5vw, 42px); font-weight: 900; color: var(--white); line-height: 1.25; margin: 16px 0 20px; }
.contact-desc { font-size: 15px; color: rgba(255,255,255,0.5); margin-bottom: 36px; line-height: 1.7; }
.contact-offers { display: flex; flex-direction: column; gap: 20px; margin-bottom: 36px; }
.offer-item { display: flex; align-items: flex-start; gap: 16px; }
.offer-icon { font-size: 24px; flex-shrink: 0; margin-top: 2px; }
.offer-item strong { display: block; color: var(--white); font-size: 15px; margin-bottom: 4px; }
.offer-item p { color: rgba(255,255,255,0.5); font-size: 13px; }
.contact-info { display: flex; flex-direction: column; gap: 10px; }
.info-item { display: flex; align-items: center; gap: 12px; color: rgba(255,255,255,0.45); font-size: 14px; }

/* Form */
.contact-form {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 40px 36px; box-shadow: var(--shadow-lg);
}
.contact-form h3 { font-size: 20px; font-weight: 800; color: var(--text); margin-bottom: 28px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 7px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; border: 1.5px solid #E8E8E8; border-radius: var(--radius);
  padding: 12px 16px; font-size: 15px; font-family: var(--font);
  color: var(--text); transition: var(--transition); outline: none; background: var(--white);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(200,16,46,0.08); }
.form-group textarea { resize: vertical; min-height: 90px; }
.form-submit {
  width: 100%; background: var(--primary); color: var(--white); border: none; cursor: pointer;
  font-size: 16px; font-weight: 700; font-family: var(--font);
  padding: 16px; border-radius: var(--radius); transition: var(--transition);
}
.form-submit:hover { background: var(--primary-light); transform: translateY(-1px); }
.form-note { font-size: 12px; color: var(--text-muted); margin-top: 12px; text-align: center; }

/* Phone field error */
.field-error {
  display: none;
  font-size: 12px; color: #E74C3C; margin-top: 4px;
}
.field-error.show { display: block; }
.phone-input.error { border-color: #E74C3C !important; box-shadow: 0 0 0 3px rgba(231,76,60,0.12) !important; }
.phone-input.valid { border-color: #27AE60 !important; box-shadow: 0 0 0 3px rgba(39,174,96,0.12) !important; }

/* Honeypot: 对真人完全不可见 */
.honeypot { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; pointer-events: none; }

/* ===== FOOTER ===== */
.footer { background: #080808; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-top {
  display: grid; grid-template-columns: 1fr 280px 180px;
  gap: 40px; padding: 48px 0;
}
.footer-heading { font-size: 14px; font-weight: 700; color: rgba(255,255,255,0.4); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 2px; }
.footer-brand { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.footer-brand .logo-icon { font-size: 28px; }
.footer-company { font-size: 16px; font-weight: 700; color: var(--white); }
.footer-tagline { font-size: 12px; color: rgba(255,255,255,0.3); margin-top: 3px; }
.footer-nav { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-nav a { font-size: 13px; color: rgba(255,255,255,0.35); transition: var(--transition); }
.footer-nav a:hover { color: rgba(255,255,255,0.8); }

/* Contact list */
.footer-contact-list { display: flex; flex-direction: column; gap: 12px; }
.fc-item { display: flex; align-items: flex-start; gap: 10px; }
.fc-icon { font-size: 16px; flex-shrink: 0; width: 20px; text-align: center; }
.fc-label { display: block; font-size: 11px; color: rgba(255,255,255,0.25); text-transform: uppercase; letter-spacing: 1px; }
.fc-value { font-size: 14px; color: rgba(255,255,255,0.65); }
.fc-link {
  font-size: 16px; font-weight: 600; color: var(--white);
  transition: var(--transition); display: inline-block;
}
.fc-link:hover { color: var(--primary-light); }

/* QR code */
.footer-qr-wrap { text-align: center; }
.footer-qr-img {
  width: 140px; height: 140px; border: 3px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); background: var(--white); padding: 8px;
}
.footer-qr-hint { display: block; font-size: 12px; color: rgba(255,255,255,0.35); margin-top: 8px; }

/* Bottom bar */
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05); padding: 16px 0;
  text-align: center; font-size: 12px; color: rgba(255,255,255,0.2);
}

/* ===== TOAST ===== */
.toast {
  position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%) translateY(80px);
  background: var(--dark-3); color: var(--white); padding: 14px 28px;
  border-radius: 100px; font-size: 14px; font-weight: 600; z-index: 9999;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3); transition: transform 0.4s ease, opacity 0.4s ease;
  opacity: 0; border: 1px solid rgba(200,16,46,0.3);
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

/* ===== SCROLL ANIMATION ===== */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .menu-toggle { display: flex; }
  .stat-item { padding: 0 20px; }
  .pain-section, .products-section, .advantages-section, .cases-section, .compare-section, .contact-section { padding: 70px 0; }
  .section-header { margin-bottom: 40px; }
  .contact-form { padding: 28px 20px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-qr-col { display: flex; flex-direction: column; align-items: center; text-align: center; }
  .adv-panel { padding: 28px 24px; }
  .pain-conclusion-inner { flex-direction: column; }
}