/* ===== 淘销宝 taoxiaobao.com · 企业科技风官网样式 ===== */
:root {
  --bg: #060a17;
  --bg-2: #0a1226;
  --bg-3: #0e1836;
  --panel: rgba(18, 30, 62, 0.55);
  --panel-border: rgba(90, 160, 255, 0.14);
  --blue: #3b82f6;
  --cyan: #06b6d4;
  --accent: #2a6cff;
  --accent-2: #17c0d6;
  --text: #eaf2ff;
  --text-2: #cfe1ff;
  --text-3: #9fb3d6;
  --grad: linear-gradient(135deg, #3b82f6, #06b6d4);
  --grad-text: linear-gradient(90deg, #7cc0ff, #ffffff 55%, #6ee7ff);
  --radius: 16px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  --maxw: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, sans-serif;
  background: radial-gradient(1200px 800px at 15% 10%, var(--bg-2) 0%, var(--bg) 55%, #04060f 100%);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; }

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

/* ===== 背景层 ===== */
.net-canvas { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(90, 160, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 160, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 80%);
}
.bg-orb {
  position: fixed; z-index: 0; border-radius: 50%; filter: blur(30px);
  opacity: 0.5; pointer-events: none; animation: float 16s ease-in-out infinite;
}
.bg-orb-1 { width: 520px; height: 520px; left: -140px; top: -80px; background: radial-gradient(circle, var(--accent) 0%, transparent 70%); }
.bg-orb-2 { width: 560px; height: 560px; right: -160px; top: 40%; background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%); animation-delay: -8s; }
@keyframes float { 0%,100% { transform: translateY(0) translateX(0); } 50% { transform: translateY(30px) translateX(20px); } }

/* 所有内容层置于背景之上 */
.nav, .hero, .section, .footer { position: relative; z-index: 2; }

/* ===== 导航 ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: all 0.3s ease; padding: 18px 0;
}
.nav.scrolled {
  padding: 10px 0;
  background: rgba(8, 14, 30, 0.75);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--panel-border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 11px; font-size: 20px;
  background: var(--grad); box-shadow: 0 8px 24px rgba(59, 130, 246, 0.5);
}
.brand-text {
  font-size: 24px; letter-spacing: 2px;
  background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 30px; }
.nav-links a { color: var(--text-2); font-size: 15px; position: relative; transition: color 0.2s; }
.nav-links a:hover { color: #fff; }
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--grad); transition: width 0.25s ease;
}
.nav-links a:hover::after { width: 100%; }
.nav-cta { display: inline-flex; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 12px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: 1px solid transparent; transition: all 0.25s ease; white-space: nowrap;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(59, 130, 246, 0.55); }
.btn-ghost { background: rgba(255, 255, 255, 0.04); color: var(--text); border-color: var(--panel-border); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(90, 160, 255, 0.35); }
.btn-lg { padding: 15px 30px; font-size: 16px; border-radius: 14px; }
.btn-block { width: 100%; }
.btn .arrow { transition: transform 0.25s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ===== 渐变文字 ===== */
.grad-text { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* ===== Hero ===== */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 120px 0 60px; }
.hero-inner { text-align: center; max-width: 900px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px; border-radius: 999px;
  background: rgba(59, 130, 246, 0.1); border: 1px solid var(--panel-border);
  color: var(--text-2); font-size: 14px; margin-bottom: 26px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 10px var(--accent-2); animation: pulse 1.8s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
.hero-title { font-size: clamp(34px, 6vw, 62px); font-weight: 800; line-height: 1.15; letter-spacing: 1px; }
.hero-typing { margin-top: 20px; font-size: clamp(18px, 3vw, 26px); font-weight: 600; color: var(--text-2); min-height: 34px; }
.typing-prefix { color: var(--text-3); }
.typing-text { color: var(--accent-2); }
.typing-caret { color: var(--accent-2); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-desc { margin: 24px auto 0; max-width: 680px; color: var(--text-3); font-size: 16px; line-height: 1.9; }
.hero-actions { margin-top: 36px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-stats { margin-top: 56px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.hero-stat { padding: 20px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--panel-border); backdrop-filter: blur(8px); }
.hero-stat .num { font-size: 30px; font-weight: 800; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-stat .label { margin-top: 6px; color: var(--text-3); font-size: 14px; }
.hero-scroll { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); color: var(--text-3); font-size: 13px; letter-spacing: 1px; text-align: center; }
.hero-scroll span { display: block; font-size: 22px; animation: bounce 1.8s infinite; }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(8px); } }

/* ===== 通用 section ===== */
.section { padding: 100px 0; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(10, 18, 38, 0.5), transparent); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag { font-size: 13px; letter-spacing: 3px; color: var(--accent-2); font-weight: 700; margin-bottom: 14px; }
.section-title { font-size: clamp(26px, 4vw, 40px); font-weight: 800; line-height: 1.25; }
.section-title.left { text-align: left; }
.section-sub { margin-top: 14px; color: var(--text-3); font-size: 16px; }
.section-sub.left { text-align: left; }

/* ===== 服务卡片 ===== */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  position: relative; padding: 30px 26px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--panel-border);
  backdrop-filter: blur(10px); overflow: hidden; transition: transform 0.3s ease, border-color 0.3s ease;
}
.card:hover { transform: translateY(-8px); border-color: rgba(90, 160, 255, 0.4); }
.card-icon {
  width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: rgba(59, 130, 246, 0.12); color: var(--accent-2); margin-bottom: 20px;
}
.card-icon svg { width: 30px; height: 30px; }
.card h3 { font-size: 19px; margin-bottom: 12px; }
.card p { color: var(--text-3); font-size: 14.5px; line-height: 1.8; }
.card-list { margin-top: 16px; display: flex; flex-direction: column; gap: 9px; }
.card-list li { position: relative; padding-left: 20px; color: var(--text-2); font-size: 14px; }
.card-list li::before { content: '›'; position: absolute; left: 4px; color: var(--accent-2); font-weight: 700; }
.card-featured { border-color: rgba(90, 160, 255, 0.4); background: linear-gradient(160deg, rgba(59, 130, 246, 0.14), var(--panel)); }
.card-badge { position: absolute; top: 16px; right: 16px; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; background: var(--grad); color: #fff; }
.card-glow {
  position: absolute; width: 200px; height: 200px; border-radius: 50%; top: -80px; right: -80px;
  background: radial-gradient(circle, rgba(23, 192, 214, 0.25), transparent 70%);
  opacity: 0; transition: opacity 0.4s;
}
.card:hover .card-glow { opacity: 1; }

/* ===== 解决方案 / 终端 ===== */
.solutions-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.cap-list { margin-top: 30px; display: flex; flex-direction: column; gap: 22px; }
.cap-item { display: flex; gap: 16px; }
.cap-ico { color: var(--accent-2); font-size: 20px; line-height: 1.4; }
.cap-item b { font-size: 16px; color: var(--text); }
.cap-item p { color: var(--text-3); font-size: 14px; margin-top: 4px; }
.terminal { border-radius: 14px; overflow: hidden; border: 1px solid var(--panel-border); background: rgba(6, 10, 22, 0.9); box-shadow: var(--shadow); }
.terminal-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: rgba(16, 24, 48, 0.9); border-bottom: 1px solid var(--panel-border); }
.tdot { width: 12px; height: 12px; border-radius: 50%; }
.tdot.red { background: #ff5f57; } .tdot.yellow { background: #febc2e; } .tdot.green { background: #28c840; }
.terminal-title { margin-left: 10px; font-size: 13px; color: var(--text-3); font-family: 'Consolas', 'Courier New', monospace; }
.terminal-body { padding: 22px; font-family: 'Consolas', 'Courier New', monospace; font-size: 13.5px; line-height: 1.9; color: #7fe3a0; min-height: 300px; white-space: pre-wrap; word-break: break-all; }
.terminal-body .t-cmd { color: #6ee7ff; } .terminal-body .t-ok { color: #7fe3a0; } .terminal-body .t-warn { color: #febc2e; } .terminal-body .t-dim { color: var(--text-3); }

/* ===== 数据统计 ===== */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.stat-box { text-align: center; padding: 40px 20px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--panel-border); backdrop-filter: blur(8px); transition: transform 0.3s; }
.stat-box:hover { transform: translateY(-6px); }
.stat-num { font-size: 40px; font-weight: 800; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { margin-top: 10px; color: var(--text-3); font-size: 15px; }

/* ===== 服务流程 ===== */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.step { position: relative; padding: 30px 22px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--panel-border); backdrop-filter: blur(8px); transition: transform 0.3s, border-color 0.3s; }
.step:hover { transform: translateY(-6px); border-color: rgba(90, 160, 255, 0.4); }
.step-no { font-size: 30px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 12px; }
.step h4 { font-size: 17px; margin-bottom: 8px; }
.step p { color: var(--text-3); font-size: 13.5px; line-height: 1.7; }

/* ===== 行业 ===== */
.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.industry {
  display: flex; align-items: center; gap: 14px; padding: 22px 24px; border-radius: 14px;
  background: var(--panel); border: 1px solid var(--panel-border); backdrop-filter: blur(8px);
  font-size: 16px; font-weight: 600; color: var(--text-2); transition: all 0.3s;
}
.industry span { font-size: 26px; }
.industry:hover { transform: translateY(-4px); border-color: rgba(90, 160, 255, 0.4); color: #fff; }

/* ===== CTA 联系 ===== */
.section-cta { padding: 100px 0; }
.cta-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; padding: 50px; border-radius: 24px; background: linear-gradient(160deg, rgba(59, 130, 246, 0.14), rgba(10, 18, 38, 0.6)); border: 1px solid var(--panel-border); backdrop-filter: blur(10px); }
.cta-contacts { margin-top: 30px; display: flex; flex-direction: column; gap: 14px; }
.cta-contact { display: flex; align-items: center; gap: 12px; color: var(--text-2); font-size: 16px; }
.cta-contact span { font-size: 20px; }
.cta-form { display: flex; flex-direction: column; gap: 14px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.cta-form input, .cta-form select, .cta-form textarea {
  width: 100%; padding: 14px 16px; border-radius: 12px; font-size: 15px; font-family: inherit;
  background: rgba(6, 10, 22, 0.6); border: 1px solid var(--panel-border); color: var(--text); transition: border-color 0.2s;
}
.cta-form input::placeholder, .cta-form textarea::placeholder { color: var(--text-3); }
.cta-form input:focus, .cta-form select:focus, .cta-form textarea:focus { outline: none; border-color: var(--accent); }
.cta-form select { appearance: none; cursor: pointer; }
.cta-form select option { background: var(--bg-2); }
.cta-form textarea { resize: vertical; }
.form-tip { font-size: 14px; text-align: center; min-height: 20px; }
.form-tip.ok { color: #7fe3a0; }

/* ===== 页脚 ===== */
.footer { padding: 70px 0 30px; border-top: 1px solid var(--panel-border); background: rgba(6, 10, 22, 0.6); }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand p { margin-top: 16px; color: var(--text-3); font-size: 14px; line-height: 1.8; max-width: 320px; }
.footer-col h5 { font-size: 15px; margin-bottom: 16px; color: var(--text); }
.footer-col a { display: block; color: var(--text-3); font-size: 14px; margin-bottom: 10px; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent-2); }
.footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--panel-border); display: flex; justify-content: space-between; color: var(--text-3); font-size: 13.5px; flex-wrap: wrap; gap: 10px; }

/* ===== 滚动揭示动画 ===== */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .cards, .stat-grid, .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid, .cta-inner { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links { position: fixed; top: 64px; right: 16px; left: 16px; flex-direction: column; gap: 0; padding: 10px 0; background: rgba(8, 14, 30, 0.96); backdrop-filter: blur(14px); border: 1px solid var(--panel-border); border-radius: 14px; transform: translateY(-10px); opacity: 0; pointer-events: none; transition: all 0.25s; }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 13px 20px; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .cards, .stat-grid, .steps, .industry-grid, .footer-inner { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .cta-inner { padding: 30px 22px; }
  .section { padding: 70px 0; }
}