/* ============================================
   智拼云 - 现代简约工业风
   主色: 深蓝 #1a56db + 科技青 #06b6d4
   风格: 干净专业, 大量留白, 几何抽象
   ============================================ */

/* ---------- 重置与基础 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --cyan: #06b6d4;
  --cyan-light: #22d3ee;
  --ink: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --muted: #94a3b8;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-mute: #f1f5f9;
  --border: #e2e8f0;
  --grad: linear-gradient(135deg, #1a56db 0%, #06b6d4 100%);
  --grad-soft: linear-gradient(135deg, #eff6ff 0%, #ecfeff 100%);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow: 0 4px 20px rgba(15, 23, 42, .08);
  --shadow-lg: 0 20px 50px rgba(26, 86, 219, .12);
  --radius: 14px;
  --radius-lg: 22px;
  --maxw: 1200px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.num, .stat-num, .hero-stat-num {
  font-family: "Inter", "DIN Alternate", system-ui, sans-serif;
  font-feature-settings: "tnum";
}

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 导航栏 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: all .3s ease;
}
.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  height: 68px; display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--ink); }
.brand-logo {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  flex-shrink: 0;
}
.brand-logo img {
  width: 38px; height: 38px; display: block;
  filter: drop-shadow(0 2px 8px rgba(26, 86, 219, .3));
}
.brand span { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.nav-menu { display: flex; align-items: center; gap: 36px; }
.nav-menu a {
  font-size: 15px; color: var(--text); font-weight: 500;
  position: relative; padding: 6px 0; transition: color .2s;
}
.nav-menu a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--grad); transition: width .25s ease;
}
.nav-menu a:hover { color: var(--primary); }
.nav-menu a:hover::after { width: 100%; }

/* ---------- 导航下拉菜单 ---------- */
.nav-dropdown { position: relative; }
.nav-dropdown-trigger { display: inline-flex; align-items: center; }
.nav-dropdown-menu {
  position: absolute; top: calc(100% + 10px); right: 50%; transform: translateX(50%) translateY(-8px);
  min-width: 280px; background: #fff; border-radius: 14px;
  box-shadow: 0 12px 40px rgba(15, 23, 42, .14); border: 1px solid var(--border);
  padding: 8px; opacity: 0; visibility: hidden;
  transition: opacity .25s ease, transform .25s ease, visibility .25s;
  z-index: 200;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1; visibility: visible; transform: translateX(50%) translateY(0);
}
.dropdown-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px; border-radius: 10px; transition: background .2s;
}
.dropdown-item::after { display: none !important; }
.dropdown-item:hover { background: var(--bg-mute); }
.dropdown-icon {
  width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0;
  display: grid; place-items: center; color: var(--primary);
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
}
.dropdown-icon svg { width: 22px; height: 22px; }
.dropdown-icon.cyan { color: var(--cyan); background: linear-gradient(135deg, #ecfeff, #cffafe); }
.dropdown-icon.green { color: #059669; background: linear-gradient(135deg, #ecfdf5, #d1fae5); }
.dropdown-text { display: flex; flex-direction: column; gap: 2px; }
.dropdown-text strong { font-size: 15px; font-weight: 600; color: var(--ink); }
.dropdown-text small { font-size: 12px; color: var(--text-light); }

.nav-cta {
  padding: 10px 22px; border-radius: 999px; font-size: 14px; font-weight: 600;
  color: #fff; background: var(--grad); box-shadow: 0 4px 14px rgba(26, 86, 219, .3);
  transition: transform .2s, box-shadow .2s;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(26, 86, 219, .4); }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle svg { width: 26px; height: 26px; color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding: 120px 0 80px; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
/* 抽象几何背景 */
.hero-bg::before {
  content: ""; position: absolute; top: -10%; right: -8%;
  width: 640px; height: 640px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(6, 182, 212, .18), rgba(26, 86, 219, .08) 50%, transparent 70%);
  filter: blur(8px);
}
.hero-bg::after {
  content: ""; position: absolute; bottom: -20%; left: -10%;
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 86, 219, .12), transparent 70%);
}
/* 网格点 */
.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image: radial-gradient(rgba(26, 86, 219, .08) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, transparent, #000 20%, #000 70%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 20%, #000 70%, transparent);
}
/* 浮动几何 */
.hero-shape {
  position: absolute; border-radius: 24px; opacity: .7;
  animation: float 8s ease-in-out infinite;
}
.hero-shape.s1 {
  top: 18%; right: 8%; width: 90px; height: 90px;
  background: var(--grad); transform: rotate(15deg);
  box-shadow: 0 20px 40px rgba(26, 86, 219, .25);
}
.hero-shape.s2 {
  top: 55%; right: 22%; width: 60px; height: 60px; border-radius: 50%;
  background: var(--cyan); animation-delay: -2s;
  box-shadow: 0 12px 30px rgba(6, 182, 212, .35);
}
.hero-shape.s3 {
  top: 40%; right: 4%; width: 40px; height: 40px; border-radius: 8px;
  background: var(--primary-light); animation-delay: -4s; transform: rotate(-12deg);
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(15deg); }
  50% { transform: translateY(-20px) rotate(20deg); }
}
.hero-shape.s2 { animation-name: float2; }
@keyframes float2 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(18px); }
}

.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; }

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--border);
  font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 24px;
}
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(6, 182, 212, .2); }

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem); line-height: 1.15; font-weight: 800;
  color: var(--ink); letter-spacing: -.02em; margin-bottom: 24px;
}
.hero h1 .accent {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 1.15rem; color: var(--text-light); max-width: 540px; margin-bottom: 36px;
}

.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 12px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: none; transition: all .25s; white-space: nowrap;
}
.btn-primary { color: #fff; background: var(--grad); box-shadow: 0 8px 20px rgba(26, 86, 219, .3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 28px rgba(26, 86, 219, .4); }
.btn-ghost { color: var(--ink); background: #fff; border: 1.5px solid var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }
.btn svg { width: 18px; height: 18px; }

.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stat { display: flex; flex-direction: column; }
.hero-stat-num { font-size: 2.2rem; font-weight: 800; color: var(--ink); line-height: 1; }
.hero-stat-num .unit { font-size: 1.2rem; color: var(--primary); margin-left: 2px; }
.hero-stat-label { font-size: 14px; color: var(--text-light); margin-top: 8px; }

/* Hero 右侧 - 拼版可视化 */
.hero-visual { position: relative; }
.hero-panel {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px; box-shadow: var(--shadow-lg); position: relative;
}
.hero-panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.hero-panel-title { font-size: 13px; color: var(--text-light); font-weight: 600; }
.hero-panel-badge {
  font-size: 12px; font-weight: 700; color: var(--cyan);
  background: rgba(6, 182, 212, .1); padding: 4px 10px; border-radius: 999px;
}
/* 拼版网格演示 */
.nesting {
  position: relative; height: 260px; border-radius: 14px; overflow: hidden;
  background:
    linear-gradient(rgba(26, 86, 219, .04) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, rgba(26, 86, 219, .04) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--bg-soft);
  border: 1px solid var(--border);
}
.piece {
  position: absolute; border-radius: 6px;
  background: var(--grad); opacity: .9;
  animation: pieceIn .6s ease both;
}
.piece.p1 { top: 8%; left: 6%; width: 28%; height: 38%; transform: rotate(0); }
.piece.p2 { top: 8%; left: 38%; width: 22%; height: 38%; }
.piece.p3 { top: 8%; left: 64%; width: 30%; height: 55%; }
.piece.p4 { top: 50%; left: 6%; width: 36%; height: 42%; }
.piece.p5 { top: 50%; left: 46%; width: 14%; height: 42%; }
.piece.p6 { top: 67%; left: 64%; width: 30%; height: 25%; }
.piece.cyan { background: linear-gradient(135deg, #06b6d4, #22d3ee); }
@keyframes pieceIn { from { opacity: 0; transform: scale(.6); } to { opacity: .9; transform: scale(1); } }

.hero-panel-foot { display: flex; justify-content: space-between; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--border); }
.hero-foot-item .num { font-size: 1.5rem; font-weight: 800; color: var(--primary); }
.hero-foot-item .lbl { font-size: 12px; color: var(--text-light); }

/* ---------- 通用 section ---------- */
.section { padding: 100px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.section-eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--cyan); margin-bottom: 14px;
}
.section h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; color: var(--ink); letter-spacing: -.02em; line-height: 1.25; }
.section h2 .accent { color: var(--primary); }
.section-sub { font-size: 1.05rem; color: var(--text-light); margin-top: 16px; }

/* ---------- 产品矩阵 ---------- */
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 36px 30px; transition: all .3s ease; position: relative; overflow: hidden;
}
.product-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--grad); transform: scaleX(0); transform-origin: left; transition: transform .35s;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card:hover::before { transform: scaleX(1); }
.product-icon {
  width: 64px; height: 64px; border-radius: 16px; margin-bottom: 24px;
  display: grid; place-items: center;
  background: var(--grad-soft); color: var(--primary);
}
.product-icon svg { width: 32px; height: 32px; }
.product-card.cyan .product-icon { background: linear-gradient(135deg, #ecfeff, #e0f7fe); color: var(--cyan); }
.product-card.green .product-icon { background: linear-gradient(135deg, #f0fdf4, #dcfce7); color: #16a34a; }
.product-tag {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--text-light);
  background: var(--bg-mute); padding: 4px 10px; border-radius: 6px; margin-bottom: 14px;
}
.product-card h3 { font-size: 1.45rem; font-weight: 700; color: var(--ink); margin-bottom: 12px; }
.product-card p.desc { color: var(--text-light); font-size: .98rem; margin-bottom: 20px; min-height: 48px; }
.product-features { margin-bottom: 24px; }
.product-features li {
  font-size: .92rem; color: var(--text); padding: 6px 0 6px 26px; position: relative;
}
.product-features li::before {
  content: ""; position: absolute; left: 0; top: 12px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--grad-soft);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231a56db' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-size: 12px; background-repeat: no-repeat; background-position: center;
}
.product-card.cyan .product-features li::before {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2306b6d4' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
}
.product-card.green .product-features li::before {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2316a34a' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
}
.product-link {
  display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--primary);
  font-size: .95rem; transition: gap .2s;
}
.product-card.cyan .product-link { color: var(--cyan); }
.product-card.green .product-link { color: #16a34a; }
.product-link:hover { gap: 12px; }
.product-link svg { width: 16px; height: 16px; }

/* ---------- 核心优势 ---------- */
.advantages { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.adv-card {
  background: #fff; border-radius: var(--radius-lg); padding: 40px 32px;
  border: 1px solid var(--border); position: relative; overflow: hidden;
  transition: all .3s;
}
.adv-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.adv-num {
  position: absolute; top: 24px; right: 28px; font-size: 4.5rem; font-weight: 800;
  color: var(--bg-mute); line-height: 1; font-family: "Inter", sans-serif;
}
.adv-icon {
  width: 56px; height: 56px; border-radius: 14px; margin-bottom: 24px;
  display: grid; place-items: center; background: var(--grad); color: #fff;
  box-shadow: 0 8px 20px rgba(26, 86, 219, .25);
}
.adv-card:nth-child(2) .adv-icon { background: linear-gradient(135deg, #06b6d4, #22d3ee); box-shadow: 0 8px 20px rgba(6, 182, 212, .3); }
.adv-card:nth-child(3) .adv-icon { background: linear-gradient(135deg, #16a34a, #22c55e); box-shadow: 0 8px 20px rgba(22, 163, 74, .25); }
.adv-icon svg { width: 28px; height: 28px; }
.adv-card h3 { font-size: 1.35rem; font-weight: 700; color: var(--ink); margin-bottom: 12px; position: relative; }
.adv-card p { color: var(--text-light); font-size: .98rem; margin-bottom: 20px; }
.adv-metric {
  display: inline-flex; align-items: baseline; gap: 4px;
  padding: 8px 16px; border-radius: 10px; background: var(--bg-soft);
  border: 1px solid var(--border);
}
.adv-metric .v { font-size: 1.4rem; font-weight: 800; color: var(--primary); font-family: "Inter", sans-serif; }
.adv-card:nth-child(2) .adv-metric .v { color: var(--cyan); }
.adv-card:nth-child(3) .adv-metric .v { color: #16a34a; }
.adv-metric .l { font-size: 13px; color: var(--text-light); }

/* ---------- 对比条 ---------- */
.compare { background: var(--bg-soft); }
.compare-wrap { background: #fff; border-radius: var(--radius-lg); padding: 48px; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.compare-row { display: grid; grid-template-columns: 1.2fr 1fr 1fr; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--border); }
.compare-row:last-child { border-bottom: none; }
.compare-row.head { font-weight: 700; color: var(--ink); padding-bottom: 16px; }
.compare-row.head .col-bad { color: var(--muted); }
.compare-row.head .col-good { color: var(--primary); }
.compare-label { font-weight: 600; color: var(--ink); }
.compare-val { font-family: "Inter", sans-serif; font-weight: 600; }
.col-bad { color: var(--text-light); }
.col-good { color: var(--primary); }
.compare-bar { display: inline-block; height: 8px; border-radius: 4px; background: var(--bg-mute); margin-top: 6px; vertical-align: middle; position: relative; overflow: hidden; }
.compare-bar.good { background: var(--grad); }
.compare-bar > i { display: block; height: 100%; background: #cbd5e1; border-radius: 4px; }

/* ---------- 客户案例 ---------- */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: #fff; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); transition: all .3s;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-top {
  height: 8px; background: var(--grad);
}
.case-card:nth-child(2) .case-top { background: linear-gradient(90deg, #06b6d4, #22d3ee); }
.case-card:nth-child(3) .case-top { background: linear-gradient(90deg, #16a34a, #22c55e); }
.case-body { padding: 28px; }
.case-industry {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary);
  background: var(--bg-soft); padding: 4px 10px; border-radius: 6px; margin-bottom: 14px;
}
.case-card h4 { font-size: 1.15rem; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
.case-card p { font-size: .92rem; color: var(--text-light); margin-bottom: 20px; }
.case-metrics { display: flex; gap: 24px; padding-top: 18px; border-top: 1px solid var(--border); }
.case-metric .v { font-size: 1.6rem; font-weight: 800; color: var(--primary); font-family: "Inter", sans-serif; line-height: 1; }
.case-card:nth-child(2) .case-metric .v { color: var(--cyan); }
.case-card:nth-child(3) .case-metric .v { color: #16a34a; }
.case-metric .l { font-size: 12px; color: var(--text-light); margin-top: 4px; }

/* ---------- CTA ---------- */
.cta-band { padding: 80px 0; }
.cta-box {
  position: relative; border-radius: 28px; padding: 64px 48px; overflow: hidden;
  background: var(--grad); color: #fff; text-align: center;
}
.cta-box::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, .15) 1px, transparent 1px);
  background-size: 24px 24px; opacity: .6;
}
.cta-box::after {
  content: ""; position: absolute; top: -50%; right: -10%; width: 400px; height: 400px;
  border-radius: 50%; background: rgba(255, 255, 255, .1); filter: blur(20px);
}
.cta-box > * { position: relative; z-index: 2; }
.cta-box h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: 14px; }
.cta-box p { font-size: 1.05rem; opacity: .92; margin: 0 auto 36px; max-width: 620px; line-height: 1.7; }
.cta-box .btn { background: #fff; color: var(--primary); }
.cta-box .btn:hover { background: var(--bg-soft); transform: translateY(-3px); }
.cta-box .btn-ghost-w { background: transparent; color: #fff; border: 1.5px solid rgba(255, 255, 255, .5); }
.cta-box .btn-ghost-w:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink); color: #cbd5e1; padding: 64px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.footer-brand .brand { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: .92rem; line-height: 1.7; color: #94a3b8; max-width: 320px; }
.footer-col h5 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 18px; }
.footer-col ul li { padding: 6px 0; }
.footer-col ul li a { font-size: .92rem; color: #94a3b8; transition: color .2s; white-space: nowrap; }
.footer-col ul li a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; font-size: .85rem; color: #64748b; }

/* ---------- 体验使用弹窗 ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(15, 23, 42, .55);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity .3s ease, visibility .3s ease;
}
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal-box {
  position: relative; background: #fff; border-radius: 24px;
  padding: 40px 36px 32px; width: 92%; max-width: 480px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .25);
  transform: translateY(20px) scale(.96);
  transition: transform .3s cubic-bezier(.34, 1.56, .64, 1);
}
.modal-overlay.active .modal-box { transform: translateY(0) scale(1); }
.modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px; border: none; border-radius: 10px;
  background: #f1f5f9; color: #64748b; cursor: pointer;
  display: grid; place-items: center; transition: all .2s;
}
.modal-close svg { width: 18px; height: 18px; }
.modal-close:hover { background: #e2e8f0; color: #1e293b; }
.modal-box h3 { font-size: 1.4rem; font-weight: 800; color: var(--text); text-align: center; margin-bottom: 6px; }
.modal-sub { text-align: center; font-size: .92rem; color: var(--text-light); margin-bottom: 28px; }
.modal-cards { display: flex; flex-direction: column; gap: 12px; }
.modal-card {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px; border-radius: 16px;
  border: 1.5px solid var(--border); background: #fff;
  text-decoration: none; transition: all .25s ease;
}
.modal-card:hover {
  border-color: var(--primary); background: #f8faff;
  transform: translateX(4px); box-shadow: 0 4px 16px rgba(26, 86, 219, .12);
}
.modal-card-icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center; flex-shrink: 0;
}
.modal-card-icon svg { width: 24px; height: 24px; }
.modal-card-body { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.modal-card-body strong { font-size: 1.02rem; font-weight: 700; color: var(--text); }
.modal-card-body small { font-size: .84rem; color: var(--text-light); }
.modal-card-arrow { width: 18px; height: 18px; color: #cbd5e1; flex-shrink: 0; transition: color .2s; }
.modal-card:hover .modal-card-arrow { color: var(--primary); }
@media (max-width: 640px) {
  .modal-box { padding: 32px 20px 24px; }
  .modal-box h3 { font-size: 1.2rem; }
}

/* ---------- 滚动渐入动画 ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: .1s; }
.reveal.delay-2 { transition-delay: .2s; }
.reveal.delay-3 { transition-delay: .3s; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 480px; }
  .products, .advantages, .cases { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-menu { display: none; }
  .nav-toggle { display: block; }
  .nav-menu.open {
    display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; padding: 20px 24px; gap: 16px; border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  .nav-dropdown { display: none; }
  .nav-dropdown-menu {
    position: static; transform: none;
    box-shadow: none; border: none; padding: 0; min-width: 0;
    margin-top: 0;
    max-height: 0; overflow: hidden; opacity: 1; visibility: visible;
    transition: max-height .3s ease, margin-top .3s ease;
  }
  .nav-dropdown.expanded .nav-dropdown-menu {
    max-height: 260px; margin-top: 8px;
  }
  .nav-dropdown-trigger svg { transition: transform .3s ease; }
  .nav-dropdown.expanded .nav-dropdown-trigger svg { transform: rotate(180deg); }
  .dropdown-item { padding: 10px 14px; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .hero { padding: 100px 0 60px; }
  .products, .advantages, .cases { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-stats { gap: 24px; }
  .compare-wrap { padding: 24px; }
  .compare-row { grid-template-columns: 1fr; gap: 8px; }
  .cta-box { padding: 40px 24px; }
  .footer-bottom { flex-direction: column; gap: 12px; }
}

/* ---------- 联系信息 ---------- */
.contact-wrap { display: flex; align-items: center; justify-content: center; gap: 56px; }
.contact-info { flex: 1; max-width: 460px; text-align: left; }
.contact-list { display: flex; flex-direction: column; gap: 18px; font-size: 1rem; }
.contact-item { display: flex; align-items: center; gap: 10px; color: rgba(255, 255, 255, .92); }
.contact-item svg { width: 20px; height: 20px; flex-shrink: 0; opacity: .9; }
.contact-item a { color: #fff; border-bottom: 1px solid rgba(255, 255, 255, .35); transition: border-color .2s; }
.contact-item a:hover { border-bottom-color: #fff; }
.contact-address { font-size: .92rem; color: rgba(255, 255, 255, .78); line-height: 1.6; }
.contact-qr {
  background: #fff; border-radius: 18px; padding: 18px;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .18); flex-shrink: 0;
}
.contact-qr img { width: 150px; height: 150px; border-radius: 10px; }
.contact-qr span { font-size: 15px; font-weight: 600; color: var(--text); white-space: nowrap; }
@media (max-width: 768px) {
  .contact-wrap { flex-direction: column; gap: 36px; }
  .contact-info { text-align: center; max-width: 100%; }
  .contact-list { align-items: center; }
}
@media (max-width: 640px) {
  .contact-qr img { width: 130px; height: 130px; }
}