* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif; color: #1f2933; background: #f5f7fa; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* 布局基础 */
.container { width: 90%; max-width: 1200px; margin: 0 auto; }
section { padding: 60px 0; }
.section-title { font-size: 28px; text-align: center; margin-bottom: 16px; }
.section-subtitle { text-align: center; color: #6b7280; margin-bottom: 40px; }

/* 头部导航 */
header { position: sticky; top: 0; z-index: 999; background: rgba(15, 23, 42, 0.96); backdrop-filter: blur(10px); }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.logo { display: flex; align-items: center; gap: 8px; color: #e5e7eb; }
.logo-mark { width: 28px; height: 28px; border-radius: 10px; background: linear-gradient(135deg, #22d3ee, #6366f1); display: flex; align-items: center; justify-content: center; color: #0f172a; font-size: 16px; font-weight: 700; }
.logo-text { font-weight: 600; letter-spacing: 1px; }
nav ul { list-style: none; display: flex; gap: 24px; }
nav li { font-size: 14px; color: #9ca3af; cursor: pointer; transition: color 0.2s, transform 0.2s; }
nav li:hover { color: #e5e7eb; transform: translateY(-1px); }
.nav-cta { padding: 8px 16px; border-radius: 999px; background: linear-gradient(135deg, #22c55e, #22d3ee); color: #0f172a; font-size: 14px; font-weight: 600; }

/* 小屏导航 */
.nav-toggle { display: none; width: 24px; height: 24px; flex-direction: column; justify-content: space-between; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; background: #e5e7eb; border-radius: 999px; }
@media (max-width: 768px) {
  nav ul { display: none; position: absolute; top: 56px; left: 0; right: 0; background: #020617; padding: 12px 20px 16px; flex-direction: column; gap: 12px; border-bottom: 1px solid rgba(148, 163, 184, 0.2); }
  nav ul.show { display: flex; }
  .nav-toggle { display: flex; }
  .nav-cta { margin-top: 4px; text-align: center; }
}

/* 英雄区 */
.hero { background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.25), transparent 55%), radial-gradient(circle at bottom right, rgba(129, 140, 248, 0.25), transparent 55%), #020617; color: #e5e7eb; padding: 80px 0 70px; }
.hero-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(15, 23, 42, 0.8); border-radius: 999px; padding: 4px 10px; font-size: 11px; color: #9ca3af; border: 1px solid rgba(148, 163, 184, 0.4); margin-bottom: 20px; }
.hero-badge span { padding: 2px 8px; border-radius: 999px; background: rgba(52, 211, 153, 0.14); color: #6ee7b7; font-weight: 500; }
.hero-title { font-size: 38px; line-height: 1.2; margin-bottom: 16px; }
.hero-title span { background: linear-gradient(120deg, #22d3ee, #a855f7); -webkit-background-clip: text; color: transparent; }
.hero-desc { color: #9ca3af; margin-bottom: 26px; max-width: 500px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 24px; }
.btn-primary { padding: 12px 22px; border-radius: 999px; border: none; background: linear-gradient(135deg, #3b82f6, #22d3ee); color: #0f172a; font-weight: 600; cursor: pointer; font-size: 14px; box-shadow: 0 14px 35px rgba(37, 99, 235, 0.4); }
.btn-secondary { padding: 12px 22px; border-radius: 999px; border: 1px solid rgba(148, 163, 184, 0.8); background: transparent; color: #e5e7eb; font-size: 14px; cursor: pointer; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 24px; font-size: 12px; color: #6b7280; }
.hero-metric strong { display: block; color: #e5e7eb; font-size: 18px; margin-bottom: 4px; }

.hero-visual { position: relative; }
.hero-card { background: rgba(15, 23, 42, 0.9); border-radius: 24px; padding: 22px; border: 1px solid rgba(148, 163, 184, 0.35); box-shadow: 0 25px 60px rgba(15, 23, 42, 0.7); }
.hero-card-title { font-size: 14px; color: #e5e7eb; margin-bottom: 8px; display: flex; justify-content: space-between; align-items: center; }
.hero-chip { font-size: 10px; padding: 4px 8px; border-radius: 999px; border: 1px solid rgba(96, 165, 250, 0.6); color: #93c5fd; }
.hero-chart { height: 160px; border-radius: 18px; background: radial-gradient(circle at top, rgba(52, 211, 153, 0.28), transparent 65%), radial-gradient(circle at bottom, rgba(59, 130, 246, 0.3), transparent 65%), #020617; display: flex; align-items: flex-end; gap: 6px; padding: 12px 18px; overflow: hidden; }
.hero-bar { flex: 1; border-radius: 999px 999px 4px 4px; background: linear-gradient(180deg, rgba(248, 250, 252, 0.96), rgba(148, 163, 184, 0.25)); opacity: 0.7; }
.hero-bar:nth-child(3), .hero-bar:nth-child(4), .hero-bar:nth-child(5) { background: linear-gradient(180deg, rgba(52, 211, 153, 0.96), rgba(37, 99, 235, 0.9)); opacity: 1; }
.hero-bar:nth-child(1) { height: 35%; }
.hero-bar:nth-child(2) { height: 48%; }
.hero-bar:nth-child(3) { height: 70%; }
.hero-bar:nth-child(4) { height: 82%; }
.hero-bar:nth-child(5) { height: 60%; }
.hero-bar:nth-child(6) { height: 42%; }
.hero-stats { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; font-size: 11px; color: #9ca3af; }
.hero-avatar-row { position: absolute; right: -8px; bottom: -16px; background: #020617; border-radius: 16px; padding: 10px 14px; border: 1px solid rgba(148, 163, 184, 0.35); display: flex; align-items: center; gap: 10px; box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9); }
.hero-avatars { display: flex; }
.avatar-dot { width: 24px; height: 24px; border-radius: 999px; border: 2px solid #020617; margin-left: -6px; background: linear-gradient(135deg, #22d3ee, #6366f1); }
.avatar-dot:nth-child(2) { background: linear-gradient(135deg, #34d399, #22c55e); }
.avatar-dot:nth-child(3) { background: linear-gradient(135deg, #f97316, #e11d48); }
.hero-avatar-row-text { font-size: 11px; color: #e5e7eb; }
.hero-avatar-row-text span { display: block; color: #22c55e; }

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; margin-bottom: 12px; }
  .hero { padding-top: 70px; }
}

/* 关于我们 */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
.about-text p { color: #4b5563; margin-bottom: 14px; line-height: 1.7; }
.about-highlights { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 20px; }
.about-item { background: #fff; border-radius: 16px; padding: 16px 18px; border: 1px solid #e5e7eb; box-shadow: 0 8px 25px rgba(15, 23, 42, 0.04); }
.about-item-title { font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.about-item p { font-size: 12px; color: #6b7280; margin: 0; }
.about-badge { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; padding: 4px 10px; border-radius: 999px; background: #ecfdf5; color: #16a34a; margin-bottom: 10px; }
.about-right { position: relative; }
.about-card { background: #020617; border-radius: 20px; padding: 20px; color: #e5e7eb; border: 1px solid rgba(148, 163, 184, 0.3); box-shadow: 0 18px 40px rgba(15, 23, 42, 0.38); }
.about-card-title { font-size: 14px; margin-bottom: 8px; display: flex; justify-content: space-between; align-items: center; }
.about-pill { font-size: 10px; padding: 3px 8px; border-radius: 999px; background: rgba(59, 130, 246, 0.14); color: #60a5fa; }
.about-timeline { margin-top: 12px; }
.timeline-item { display: flex; align-items: center; gap: 10px; font-size: 11px; color: #9ca3af; margin-bottom: 8px; }
.timeline-dot { width: 8px; height: 8px; border-radius: 999px; background: #4ade80; box-shadow: 0 0 0 4px rgba(74, 222, 128, 0.2); }
.timeline-item span { color: #e5e7eb; }

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* 解决方案 */
.solutions-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.solution-card { background: #fff; border-radius: 18px; padding: 18px 18px 16px; border: 1px solid #e5e7eb; box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04); display: flex; flex-direction: column; justify-content: space-between; min-height: 160px; transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease; }
.solution-card:hover { transform: translateY(-3px); border-color: rgba(59, 130, 246, 0.55); box-shadow: 0 20px 40px rgba(148, 163, 184, 0.32); }
.solution-title { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.solution-tag { font-size: 11px; padding: 3px 8px; border-radius: 999px; background: #eff6ff; color: #2563eb; display: inline-block; margin-bottom: 8px; }
.solution-desc { font-size: 13px; color: #6b7280; margin-bottom: 10px; }
.solution-meta { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: #9ca3af; }
.solution-meta span strong { color: #4b5563; }
@media (max-width: 900px) {
  .solutions-grid { grid-template-columns: 1fr; }
}

/* 产品商城 */
.shop { background: #0b1120; color: #e5e7eb; }
.shop .section-title { color: #e5e7eb; }
.shop .section-subtitle { color: #9ca3af; }

.shop-layout { display: grid; grid-template-columns: minmax(0, 2.4fr) minmax(0, 1.3fr); gap: 30px; align-items: flex-start; }
.product-filter { display: flex; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.filter-pill { font-size: 12px; padding: 6px 12px; border-radius: 999px; border: 1px solid rgba(148, 163, 184, 0.7); color: #cbd5f5; cursor: pointer; }
.filter-pill.active { background: linear-gradient(135deg, #3b82f6, #22d3ee); border-color: transparent; color: #0b1120; font-weight: 600; }

.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.product-card { background: #020617; border-radius: 16px; padding: 12px 12px 14px; border: 1px solid rgba(30, 64, 175, 0.7); box-shadow: 0 16px 36px rgba(15, 23, 42, 0.7); display: flex; flex-direction: column; justify-content: space-between; min-height: 210px; }
.product-chip { font-size: 10px; padding: 3px 7px; border-radius: 999px; background: rgba(22, 163, 74, 0.12); color: #4ade80; display: inline-block; margin-bottom: 6px; }
.product-title { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.product-spec { font-size: 11px; color: #9ca3af; margin-bottom: 8px; min-height: 32px; }
.product-meta { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.product-price { font-size: 16px; font-weight: 700; color: #22d3ee; }
.product-price span { font-size: 12px; color: #9ca3af; font-weight: 400; margin-left: 3px; }
.product-tagline { font-size: 11px; color: #9ca3af; }
.product-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; gap: 8px; }
.btn-add { flex: 1; padding: 7px 8px; border-radius: 999px; border: none; background: linear-gradient(135deg, #4ade80, #22c55e); color: #022c22; font-size: 12px; font-weight: 600; cursor: pointer; }
.btn-outline { padding: 7px 10px; border-radius: 999px; border: 1px solid rgba(148, 163, 184, 0.8); background: transparent; color: #e5e7eb; font-size: 11px; cursor: pointer; white-space: nowrap; }

@media (max-width: 960px) {
  .shop-layout { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 500px) {
  .product-grid { grid-template-columns: 1fr; }
}

/* 购物车 */
.cart { background: rgba(15, 23, 42, 0.8); border-radius: 18px; padding: 16px 16px 18px; border: 1px solid rgba(148, 163, 184, 0.5); box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9); position: sticky; top: 90px; }
.cart-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.cart-title { font-size: 15px; font-weight: 600; }
.cart-count { font-size: 11px; color: #9ca3af; }
.cart-list { max-height: 260px; overflow-y: auto; margin-bottom: 10px; padding-right: 4px; }
.cart-empty { font-size: 12px; color: #6b7280; padding: 10px 4px 4px; }
.cart-item { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: #e5e7eb; padding: 7px 4px; border-bottom: 1px dashed rgba(75, 85, 99, 0.6); gap: 6px; }
.cart-item-main { flex: 1; }
.cart-item-title { font-weight: 500; margin-bottom: 3px; }
.cart-item-meta { font-size: 11px; color: #9ca3af; }
.cart-item-price { font-size: 12px; color: #38bdf8; white-space: nowrap; }
.cart-item-actions { display: flex; align-items: center; gap: 4px; }
.qty-btn { width: 20px; height: 20px; border-radius: 999px; border: none; background: rgba(15, 23, 42, 0.9); color: #e5e7eb; font-size: 12px; cursor: pointer; display: flex; align-items: center; justify-content: center; border: 1px solid rgba(148, 163, 184, 0.8); }
.qty-text { min-width: 18px; text-align: center; font-size: 12px; }
.cart-footer { border-top: 1px solid rgba(55, 65, 81, 0.8); padding-top: 10px; font-size: 12px; color: #9ca3af; }
.cart-total-row { display: flex; justify-content: space-between; margin-bottom: 6px; }
.cart-total-row span:last-child { color: #fbbf24; font-size: 14px; font-weight: 600; }
.cart-actions { display: flex; gap: 8px; margin-top: 8px; }
.btn-cart-primary { flex: 1; padding: 9px 10px; border-radius: 999px; border: none; background: linear-gradient(135deg, #eab308, #f97316); color: #0b1120; font-size: 12px; font-weight: 700; cursor: pointer; }
.btn-cart-secondary { padding: 9px 10px; border-radius: 999px; border: 1px dashed rgba(148, 163, 184, 0.8); background: transparent; color: #e5e7eb; font-size: 11px; cursor: pointer; white-space: nowrap; }

/* 成功案例 & 新闻 */
.cases-news { display: grid; grid-template-columns: 1.5fr 1.2fr; gap: 28px; }
.case-list, .news-list { display: flex; flex-direction: column; gap: 12px; }
.case-item, .news-item { background: #fff; border-radius: 14px; padding: 12px 14px; border: 1px solid #e5e7eb; box-shadow: 0 6px 18px rgba(15, 23, 42, 0.04); font-size: 13px; }
.case-tag, .news-tag { font-size: 11px; color: #22c55e; margin-bottom: 4px; }
.news-tag { color: #3b82f6; }
.case-title, .news-title { font-weight: 600; margin-bottom: 4px; }
.case-meta, .news-meta { font-size: 11px; color: #9ca3af; }
@media (max-width: 900px) {
  .cases-news { grid-template-columns: 1fr; }
}

/* 联系我们 */
.contact { background: #020617; color: #e5e7eb; }
.contact-grid { display: grid; grid-template-columns: 1.1fr 1.2fr; gap: 30px; align-items: flex-start; }
.contact-info p { font-size: 13px; color: #9ca3af; margin-bottom: 8px; }
.contact-list { margin-top: 10px; font-size: 13px; color: #e5e7eb; }
.contact-list div { margin-bottom: 6px; }
.contact-form { background: rgba(15, 23, 42, 0.9); border-radius: 18px; padding: 18px 18px 20px; border: 1px solid rgba(148, 163, 184, 0.5); box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9); }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; margin-bottom: 10px; }
.form-group { margin-bottom: 10px; }
label { display: block; font-size: 12px; margin-bottom: 4px; color: #cbd5f5; }
input, textarea, select { width: 100%; border-radius: 10px; border: 1px solid rgba(55, 65, 81, 0.9); background: #020617; padding: 8px 10px; font-size: 13px; color: #e5e7eb; }
textarea { resize: vertical; min-height: 80px; }
.form-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; font-size: 11px; color: #6b7280; }
.btn-send { padding: 9px 18px; border-radius: 999px; border: none; background: linear-gradient(135deg, #3b82f6, #22d3ee); color: #020617; font-size: 12px; font-weight: 600; cursor: pointer; }
@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

/* 页脚 */
footer { background: #020617; color: #6b7280; padding: 20px 0 22px; font-size: 12px; border-top: 1px solid rgba(31, 41, 55, 0.9); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.footer-links { display: flex; gap: 16px; }
.footer-links a { color: #9ca3af; font-size: 12px; }

/* 平滑滚动 */
html { scroll-behavior: smooth; }