/* ==========================================================
   智音智能报价系统 — 官网样式
   配色：深蓝 #0b1b3a / 主蓝 #2f7cf6 / 青 #13c2c2
   ========================================================== */
:root {
  --primary: #2f7cf6;
  --primary-dark: #1c5fd0;
  --cyan: #13c2c2;
  --ink: #0b1b3a;
  --ink-2: #2b3a55;
  --text: #44506b;
  --bg-alt: #f5f8fc;
  --line: #e6ecf5;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(11, 27, 58, .08);
  --shadow-lg: 0 24px 60px rgba(11, 27, 58, .16);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 820px; }
.grad-text {
  background: linear-gradient(90deg, #2f7cf6, #13c2c2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: all .25s ease;
  border: 1.5px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 16px rgba(47, 124, 246, .35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(47, 124, 246, .42); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { border-color: #cdd9ea; color: var(--ink-2); background: #fff; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-ghost { color: #fff; background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.25); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 10px 30px rgba(0,0,0,.18); }
.btn-light:hover { transform: translateY(-2px); }
.btn-lg { padding: 14px 34px; font-size: 16px; border-radius: 12px; }
.btn-block { width: 100%; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(11, 27, 58, .92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { display: inline-flex; filter: drop-shadow(0 2px 6px rgba(47,124,246,.5)); }
.brand-text { color: #fff; font-size: 17px; font-weight: 700; letter-spacing: .5px; }
.main-nav { display: flex; gap: 34px; }
.nav-link { color: rgba(255,255,255,.82); font-size: 15px; padding: 6px 2px; position: relative; transition: color .2s; }
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 2px; background: var(--cyan); border-radius: 2px; transition: right .25s;
}
.nav-link:hover { color: #fff; }
.nav-link:hover::after { right: 0; }
.header-actions { display: flex; gap: 10px; align-items: center; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: #fff; border-radius: 2px; transition: all .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--ink);
  color: #fff;
  padding: 150px 0 110px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 78% 20%, rgba(47,124,246,.35), transparent 60%),
    radial-gradient(ellipse 45% 40% at 15% 85%, rgba(19,194,194,.22), transparent 60%),
    radial-gradient(ellipse 30% 30% at 50% 50%, rgba(47,124,246,.08), transparent 60%);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  color: #7dd3fc;
  background: rgba(47,124,246,.15);
  border: 1px solid rgba(47,124,246,.4);
  margin-bottom: 22px;
}
.hero h1 { font-size: 44px; line-height: 1.28; font-weight: 800; letter-spacing: .5px; }
.hero-sub { margin-top: 20px; font-size: 17px; color: rgba(255,255,255,.75); line-height: 1.9; }
.hero-cta { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero-points { display: flex; gap: 22px; margin-top: 28px; flex-wrap: wrap; }
.hero-points li { font-size: 14px; color: rgba(255,255,255,.7); display: flex; align-items: center; gap: 8px; }
.dot-check {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--cyan);
  position: relative; flex: none;
}
.dot-check::after {
  content: ""; position: absolute; left: 4.5px; top: 3px;
  width: 5px; height: 8px;
  border: solid #04202f; border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* 界面 mockup */
.hero-visual { position: relative; }
.mock-window {
  background: #0e2145;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: perspective(1200px) rotateY(-6deg) rotateX(2deg);
  transition: transform .4s;
}
.mock-window:hover { transform: perspective(1200px) rotateY(-2deg) rotateX(1deg); }
.mock-titlebar {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px;
  background: rgba(255,255,255,.05);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.mock-titlebar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.25); }
.mock-titlebar span:nth-child(1) { background: #ff5f57; }
.mock-titlebar span:nth-child(2) { background: #febc2e; }
.mock-titlebar span:nth-child(3) { background: #28c840; }
.mock-titlebar em { font-style: normal; font-size: 12px; color: rgba(255,255,255,.6); margin-left: 8px; }
.mock-body { display: flex; height: 320px; }
.mock-sidebar { width: 44px; background: rgba(255,255,255,.04); display: flex; flex-direction: column; align-items: center; gap: 12px; padding-top: 16px; }
.mock-sidebar i { width: 18px; height: 18px; border-radius: 5px; background: rgba(255,255,255,.16); }
.mock-sidebar i:first-child { background: var(--primary); box-shadow: 0 0 10px rgba(47,124,246,.7); }
.mock-main { flex: 1; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.mock-toolbar { display: flex; gap: 8px; }
.mock-toolbar b { width: 42px; height: 20px; border-radius: 5px; background: rgba(255,255,255,.12); }
.mock-toolbar b.wide { width: 90px; background: var(--primary); }
.mock-table { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.mock-row {
  display: grid; grid-template-columns: 1.6fr 1fr .6fr .8fr .9fr;
  gap: 8px; align-items: center;
  background: rgba(255,255,255,.05);
  border-radius: 7px; padding: 8px 10px;
  font-size: 11px; color: rgba(255,255,255,.75);
}
.mock-row.head { background: rgba(255,255,255,.09); color: rgba(255,255,255,.5); font-size: 10px; }
.mock-row.total { background: rgba(19,194,194,.14); color: #7de8e8; font-weight: 700; }
.mock-footer { display: flex; gap: 8px; }
.pill { padding: 5px 12px; border-radius: 999px; font-size: 11px; background: rgba(255,255,255,.1); color: rgba(255,255,255,.8); }
.pill.primary { background: var(--primary); color: #fff; }
.float-card {
  position: absolute;
  background: #fff;
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  animation: float 5s ease-in-out infinite;
}
.float-card-1 { top: -22px; right: -8px; }
.float-card-2 { bottom: -20px; left: -14px; animation-delay: 2.5s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(47,124,246,.08);
  border: 1px solid rgba(47,124,246,.22);
  margin-bottom: 14px;
}
.section-head h2 { font-size: 32px; color: var(--ink); font-weight: 800; margin-bottom: 12px; }
.section-head p { font-size: 16px; }

/* ---------- 功能卡片 ---------- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: all .3s ease;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.icon-blue { background: rgba(47,124,246,.1); color: #2f7cf6; }
.icon-cyan { background: rgba(19,194,194,.1); color: #13c2c2; }
.icon-green { background: rgba(82,196,26,.1); color: #52c41a; }
.icon-purple { background: rgba(114,46,209,.1); color: #722ed1; }
.icon-orange { background: rgba(250,140,22,.1); color: #fa8c16; }
.icon-pink { background: rgba(235,47,150,.1); color: #eb2f96; }
.feature-card h3 { font-size: 18px; color: var(--ink); margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: var(--text); }

/* ---------- 工作流程 ---------- */
.workflow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.workflow-step {
  background: #fff;
  border-radius: var(--radius);
  padding: 30px 24px;
  border: 1px solid var(--line);
  position: relative;
  transition: all .3s;
}
.workflow-step:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.step-num {
  font-size: 34px;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--primary);
  margin-bottom: 14px;
}
.workflow-step h3 { font-size: 17px; color: var(--ink); margin-bottom: 8px; }
.workflow-step p { font-size: 14px; }

/* ---------- 价格 ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.price-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  transition: all .3s;
  position: relative;
}
.price-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.price-card h3 { font-size: 19px; color: var(--ink); margin-bottom: 12px; }
.price { display: flex; align-items: baseline; gap: 6px; margin-bottom: 6px; }
.price strong { font-size: 44px; color: var(--ink); font-weight: 800; }
.price span { color: var(--text); font-size: 14px; }
.price-desc { font-size: 14px; color: var(--text); margin-bottom: 22px; }
.price-features { flex: 1; display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.price-features li { display: flex; align-items: center; gap: 10px; font-size: 14.5px; color: var(--ink-2); }
.price-features .dot-check { width: 15px; height: 15px; }
.price-features .dot-check::after { left: 4px; top: 2.5px; width: 5px; height: 7px; }
.price-hot {
  border: 2px solid var(--primary);
  box-shadow: 0 16px 40px rgba(47,124,246,.18);
  transform: scale(1.03);
}
.price-hot:hover { transform: scale(1.03) translateY(-6px); }
.hot-tag {
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #2f7cf6, #13c2c2);
  color: #fff;
  font-size: 12.5px;
  font-weight: 700;
  padding: 5px 18px;
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 6px 16px rgba(47,124,246,.4);
}

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 22px;
  overflow: hidden;
  transition: box-shadow .3s;
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 0;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--primary);
  font-weight: 400;
  transition: transform .25s;
  flex: none;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 0 18px; font-size: 14.5px; color: var(--text); }

/* ---------- 视频教程 ---------- */
.video-wrap {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 48px;
  align-items: center;
  justify-content: center;
  max-width: 720px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 40px 48px;
  box-shadow: var(--shadow);
}
.video-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.video-qr img {
  border-radius: 14px;
  border: 1px solid var(--line);
  padding: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  width: 200px;
  height: 200px;
  object-fit: contain;
}
.video-qr p { font-size: 13.5px; color: var(--text); }
.video-info h3 { font-size: 20px; color: var(--ink); margin-bottom: 16px; }
.video-points { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.video-points li { display: flex; align-items: center; gap: 10px; font-size: 14.5px; color: var(--ink-2); }

/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(120deg, #0b1b3a, #123069 55%, #0e2b52);
  color: #fff;
  padding: 90px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 60% at 50% 0%, rgba(47,124,246,.3), transparent 70%);
}
.cta-inner { position: relative; }
.cta h2 { font-size: 34px; font-weight: 800; margin-bottom: 14px; }
.cta p { font-size: 16px; color: rgba(255,255,255,.75); margin-bottom: 30px; }
.cta-note { font-size: 14px; margin-top: 18px; margin-bottom: 0; }
.cta-note a { color: #7dd3fc; text-decoration: underline; }

/* ---------- 页脚 ---------- */
.site-footer { background: #081426; color: rgba(255,255,255,.65); padding-top: 60px; }
.footer-inner { display: flex; justify-content: space-between; gap: 40px; padding-bottom: 44px; flex-wrap: wrap; }
.footer-brand { max-width: 280px; }
.footer-brand p { margin-top: 14px; font-size: 14px; line-height: 1.8; }
.footer-links { display: flex; gap: 64px; flex-wrap: wrap; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 6px; }
.footer-col a { font-size: 14px; transition: color .2s; }
.footer-col a:hover { color: #7dd3fc; }
.footer-muted { font-size: 13px; opacity: .6; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; font-size: 13px; flex-wrap: wrap; gap: 8px; }

/* ---------- 滚动渐入 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- 焦点可见性（无障碍） ---------- */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(47,124,246,.55);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .workflow-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 130px 0 90px; }
  .hero h1 { font-size: 36px; }
}
@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(11,27,58,.98);
    padding: 10px 24px 20px;
    transform: translateY(-120%);
    transition: transform .3s;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  .main-nav.open { transform: translateY(0); }
  .nav-link { padding: 14px 2px; border-bottom: 1px solid rgba(255,255,255,.06); }
  .nav-toggle { display: flex; }
  .header-actions { display: none; }
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-visual { max-width: 520px; margin: 0 auto; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 26px; }
  .video-wrap { grid-template-columns: 1fr; padding: 30px 22px; gap: 26px; text-align: center; }
  .video-points { align-items: flex-start; text-align: left; }
  .features-grid, .workflow-grid, .pricing-grid { grid-template-columns: 1fr; }
  .price-hot { transform: none; }
  .price-hot:hover { transform: translateY(-6px); }
  .hero { padding: 110px 0 76px; }
  .hero h1 { font-size: 30px; }
  .hero-cta .btn { width: 100%; }
  .hero-points { flex-direction: column; gap: 10px; }
  .mobile-br { display: none; }
  .mock-body { height: 260px; }
  .float-card-1 { right: 4px; top: -16px; }
  .float-card-2 { left: 4px; }
  .footer-inner { flex-direction: column; gap: 28px; }
  .footer-links { gap: 32px; }
  .cta h2 { font-size: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}
.icon-indigo { background: rgba(99,102,241,.1); color: #6366f1; }
.icon-teal { background: rgba(0,191,165,.1); color: #00bfa5; }
.icon-amber { background: rgba(250,173,20,.1); color: #faad14; }

/* ===== 桌面版下载区块 ===== */
.download-card { background: #fff; border-radius: 16px; box-shadow: 0 8px 32px rgba(15,23,42,.08); border: 1px solid #eef2f7; padding: 36px 40px; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; max-width: 900px; margin: 0 auto; }
.download-left { display: flex; align-items: flex-start; gap: 20px; flex: 1; min-width: 300px; }
.download-icon { width: 72px; height: 72px; border-radius: 18px; background: linear-gradient(135deg, #2f7cf6, #6366f1); color: #fff; display: flex; align-items: center; justify-content: center; flex: none; box-shadow: 0 8px 20px rgba(47,124,246,.3); }
.download-info h3 { font-size: 18px; color: #1f2f3d; margin: 0 0 10px; }
.download-meta { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.dl-tag { font-size: 12px; padding: 3px 12px; border-radius: 12px; background: #f0f4ff; color: #2f7cf6; font-weight: 500; }
.download-points { list-style: none; padding: 0; margin: 0; font-size: 13px; color: #5a6b85; line-height: 2; }
.download-right { display: flex; flex-direction: column; align-items: center; gap: 8px; flex: none; }
.btn-download { font-size: 16px; padding: 14px 36px; border-radius: 10px; box-shadow: 0 6px 18px rgba(47,124,246,.35); transition: all .25s; }
.btn-download:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(47,124,246,.45); }
.download-note { font-size: 12px; color: #8a97ad; margin: 0; }
.download-note-muted { font-size: 11px; color: #b0bccf; margin: 0; }
@media (max-width: 768px) {
  .download-card { padding: 24px 20px; justify-content: center; }
  .download-left { flex-direction: column; align-items: center; text-align: center; }
}