/* ==========================================================================
   SmartVoice 产品官网 — 设计系统
   品牌色 #2563EB · 蓝色渐变 · 大圆角 · 深色 Hero
   ========================================================================== */

:root {
  /* 品牌色 */
  --brand: #2563eb;
  --brand-600: #1d4ed8;
  --brand-100: #dbeafe;
  --violet: #7c3aed;
  --cyan: #06b6d4;
  --green: #16a34a;
  --amber: #f59e0b;
  --red: #ef4444;

  /* 中性色 */
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-soft: #f8fafc;

  /* 深色 Hero */
  --dark: #070d1d;
  --dark-2: #0a1428;

  /* 圆角 / 间距（对齐 App 设计 token） */
  --r-s: 8px;
  --r-m: 12px;
  --r-l: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;
  --pill: 999px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .08);
  --shadow-md: 0 8px 24px -8px rgba(15, 23, 42, .16);
  --shadow-lg: 0 24px 60px -16px rgba(15, 23, 42, .28);
  --shadow-brand: 0 12px 32px -10px rgba(37, 99, 235, .5);

  --font: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --maxw: 1160px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

/* ==========================================================================
   通用组件
   ========================================================================== */

.section { padding: 104px 24px; position: relative; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 64px; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-100);
  padding: 6px 14px;
  border-radius: var(--pill);
  margin-bottom: 20px;
}
.section-head h2 {
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
  margin-bottom: 16px;
}
.section-head p { color: var(--muted); font-size: 17px; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 11px 22px;
  border-radius: var(--r-m);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--brand); color: #fff; box-shadow: var(--shadow-brand); }
.btn-primary:hover { background: var(--brand-600); }

.btn-ghost { color: var(--ink); background: #fff; border-color: var(--line); }
.btn-ghost:hover { border-color: #cbd5e1; box-shadow: var(--shadow-sm); }

.btn-ghost-on-dark { color: #e2e8f0; background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.16); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.btn-ghost-on-dark:hover { background: rgba(255,255,255,.12); }

.btn-outline { color: var(--brand); border-color: var(--brand); }
.btn-outline:hover { background: var(--brand-100); }

.btn-lg { padding: 15px 30px; font-size: 16px; border-radius: var(--r-l); }

/* 滚动淡入 */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s cubic-bezier(.2,.65,.3,1), transform .7s cubic-bezier(.2,.65,.3,1);
}
.reveal.visible { opacity: 1; transform: none; }

/* ==========================================================================
   导航栏
   ========================================================================== */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding: 14px 24px;
  transition: background .3s ease, box-shadow .3s ease, padding .3s ease;
}
/* 顶部（Hero 深色背景上）：浅色文字 */
.nav .brand { color: #fff; }
.nav .nav-links a { color: #cbd5e1; }
.nav .nav-links a:hover { color: #fff; }
.nav .menu-toggle span { background: #fff; }
.nav .btn-ghost { color: #e2e8f0; background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.2); }
.nav .btn-ghost:hover { background: rgba(255,255,255,.16); }

/* 滚动后（白底）：深色文字 */
.nav.scrolled {
  background: rgba(255,255,255,.82);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  box-shadow: 0 1px 0 rgba(15,23,42,.06);
  padding: 10px 24px;
}
.nav.scrolled .brand { color: var(--ink); }
.nav.scrolled .nav-links a { color: #475569; }
.nav.scrolled .nav-links a:hover { color: var(--ink); }
.nav.scrolled .menu-toggle span { background: var(--ink); }
.nav.scrolled .btn-ghost { color: var(--ink); background: #fff; border-color: var(--line); }
.nav.scrolled .btn-ghost:hover { border-color: #cbd5e1; }

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; }
.brand-mark { width: 34px; height: 34px; border-radius: 9px; }
.nav-links { display: flex; gap: 26px; margin-left: auto; }
.nav-links a { font-size: 15px; font-weight: 500; transition: color .15s; }
.nav-actions { display: flex; gap: 10px; margin-left: 12px; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.menu-toggle span { width: 22px; height: 2px; border-radius: 2px; transition: transform .25s, opacity .25s; }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  background: radial-gradient(120% 120% at 80% -10%, #14264d 0%, var(--dark-2) 40%, var(--dark) 100%);
  color: #fff;
  padding: 164px 24px 120px;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .55; }
.orb-a { width: 520px; height: 520px; background: #1d4ed8; top: -160px; right: -100px; }
.orb-b { width: 420px; height: 420px; background: #7c3aed; bottom: -180px; left: -120px; opacity: .35; }
.orb-c { width: 300px; height: 300px; background: #06b6d4; top: 30%; left: 40%; opacity: .22; }
.grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(80% 80% at 50% 30%, #000 20%, transparent 80%);
  mask-image: radial-gradient(80% 80% at 50% 30%, #000 20%, transparent 80%);
}

.hero-inner {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: 48px;
}
.hero-copy .pill {
  display: inline-block;
  font-size: 13.5px;
  font-weight: 600;
  color: #bfdbfe;
  background: rgba(37,99,235,.28);
  border: 1px solid rgba(96,165,250,.35);
  padding: 7px 16px;
  border-radius: var(--pill);
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(38px, 6vw, 62px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: 24px;
}
.grad {
  background: linear-gradient(100deg, #60a5fa 0%, #a78bfa 55%, #67e8f9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead { font-size: 18px; color: #b6c4e0; max-width: 500px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-points { display: flex; gap: 22px; flex-wrap: wrap; color: #94a3b8; font-size: 14px; }
.hero-points li::before { content: ""; }

/* ---------- 手机 mockup ---------- */
.hero-visual { position: relative; display: flex; justify-content: center; }

.phone {
  width: 292px;
  height: 594px;
  background: #0b1220;
  border-radius: 48px;
  padding: 12px;
  box-shadow:
    0 0 0 1px rgba(255,255,255,.09),
    0 0 0 2px rgba(37,99,235,.25),
    0 48px 100px -20px rgba(0,0,0,.65);
  position: relative;
  transform: rotate(-2deg);
}
.phone-notch {
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 96px;
  height: 26px;
  background: #000;
  border-radius: 14px;
  z-index: 5;
}
.phone-screen {
  position: relative;
  height: 100%;
  background: linear-gradient(180deg, #eef4ff 0%, #f8fafc 100%);
  border-radius: 38px;
  overflow: hidden;
  padding: 52px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-status {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 600;
  color: #334155;
  position: absolute;
  top: 16px;
  left: 0;
  right: 0;
  padding: 0 30px;
}
.app-status-icons { letter-spacing: 1px; }
.app-head { display: flex; align-items: center; justify-content: space-between; }
.app-title { font-weight: 800; font-size: 17px; color: #0f172a; }
.app-avatar {
  width: 30px; height: 30px; border-radius: 50%;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff; font-size: 11px; font-weight: 700;
  display: grid; place-items: center;
}

.app-wave-card {
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  border-radius: 20px;
  padding: 16px;
  color: #fff;
  box-shadow: 0 12px 26px -10px rgba(37,99,235,.55);
}
.wave-label { font-size: 12px; opacity: .9; }
.wave-time { font-size: 26px; font-weight: 800; font-variant-numeric: tabular-nums; margin: 2px 0 10px; }
.waveform { display: flex; align-items: center; gap: 3px; height: 40px; }
.waveform span {
  flex: 1;
  height: var(--h);
  background: rgba(255,255,255,.85);
  border-radius: 4px;
  animation: wave 1.2s ease-in-out infinite alternate;
}
.waveform span:nth-child(odd) { animation-delay: -.5s; }
@keyframes wave { from { transform: scaleY(.55); } to { transform: scaleY(1); } }

.app-card {
  background: #fff;
  border-radius: 18px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}
.app-card-row { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: #334155; }
.chip { font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 7px; color: #fff; }
.chip-blue { background: #2563eb; }
.chip-purple { background: #7c3aed; }
.chip-green { background: #16a34a; }
.app-card-text { flex: 1; }
.check { color: #16a34a; font-weight: 800; }
.spinner {
  width: 14px; height: 14px;
  border: 2px solid #dbeafe;
  border-top-color: #2563eb;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.app-report-card {
  background: #fff;
  border-radius: 18px;
  padding: 14px;
  box-shadow: var(--shadow-sm);
}
.app-report-title { font-weight: 700; font-size: 13px; color: #0f172a; margin-bottom: 10px; }
.app-report-lines { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.ln { height: 7px; border-radius: 4px; background: #e2e8f0; }
.ln.w90 { width: 90%; } .ln.w100 { width: 100%; }
.ln.w70 { width: 70%; } .ln.w84 { width: 84%; }
.ln.w60 { width: 60%; } .ln.w92 { width: 92%; }
.ln.w78 { width: 78%; } .ln.w40 { width: 40%; }
.ln.w80 { width: 80%; } .ln.w65 { width: 65%; }
.ln.w88 { width: 88%; } .ln.w50 { width: 50%; }
.ln.w58 { width: 58%; } .ln.w76 { width: 76%; }
.ln.w72 { width: 72%; } .ln.w46 { width: 46%; }
.app-report-tags { display: flex; gap: 6px; }
.tag { font-size: 10.5px; font-weight: 600; color: #2563eb; background: #eff6ff; padding: 3px 8px; border-radius: 6px; }

.app-record-btn {
  margin: 4px auto 0;
  width: 54px; height: 54px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 6px 18px -4px rgba(239,68,68,.5);
  display: grid; place-items: center;
}
.record-dot {
  width: 22px; height: 22px; border-radius: 50%;
  background: #ef4444;
  animation: pulse 1.6s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(239,68,68,.5); }
  100% { box-shadow: 0 0 0 14px rgba(239,68,68,0); }
}

/* 漂浮徽章 */
.float-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--ink);
  border-radius: 16px;
  padding: 11px 16px;
  box-shadow: var(--shadow-lg);
  animation: floaty 5s ease-in-out infinite;
}
.float-badge .fb-icon { font-size: 22px; }
.float-badge strong { display: block; font-size: 13.5px; }
.float-badge small { font-size: 11.5px; color: var(--muted); }
.fb-1 { top: 14%; left: -8%; }
.fb-2 { bottom: 22%; left: -14%; animation-delay: -1.6s; }
.fb-3 { top: 42%; right: -10%; animation-delay: -3s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.scroll-hint { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); }
.mouse {
  width: 26px; height: 42px;
  border: 2px solid rgba(255,255,255,.4);
  border-radius: 14px;
  display: flex; justify-content: center;
  padding-top: 7px;
}
.wheel { width: 3px; height: 8px; background: #fff; border-radius: 2px; animation: wheel 1.6s ease infinite; }
@keyframes wheel { 0% { opacity: 1; transform: translateY(0); } 70% { opacity: 0; transform: translateY(12px); } 100% { opacity: 0; } }

/* ==========================================================================
   统计条
   ========================================================================== */

.stats { padding: 56px 24px; border-bottom: 1px solid var(--line); background: var(--bg-soft); }
.stats-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat { text-align: center; }
.stat strong {
  display: block;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--brand);
}
.stat strong .unit { font-size: .5em; font-weight: 700; }
.stat span { color: var(--muted); font-size: 14px; }

/* ==========================================================================
   功能特性
   ========================================================================== */

.feature-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 30px 28px;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.f-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid; place-items: center;
  color: var(--c);
  background: #f1f5f9;
  background: color-mix(in srgb, var(--c) 12%, #fff);
  margin-bottom: 20px;
}
.f-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 15px; }

/* ==========================================================================
   工作流程
   ========================================================================== */

.how { background: var(--bg-soft); }
.flow {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}
.flow-step { text-align: center; position: relative; }
.flow-num {
  position: absolute;
  top: -14px; right: 8%;
  font-size: 44px; font-weight: 900;
  color: var(--brand-100);
  z-index: 0;
  line-height: 1;
}
.flow-icon {
  position: relative;
  z-index: 1;
  width: 76px; height: 76px;
  margin: 0 auto 16px;
  border-radius: 22px;
  display: grid; place-items: center;
  color: var(--c);
  background: #fff;
  box-shadow: var(--shadow-md);
}
.flow-icon svg { width: 34px; height: 34px; }
.flow-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.flow-step p { color: var(--muted); font-size: 13.5px; }
.flow-arrow { font-size: 28px; color: #cbd5e1; font-weight: 300; }

/* ==========================================================================
   报告模板
   ========================================================================== */

.template-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.template-card { text-align: left; }
.t-preview {
  aspect-ratio: 4 / 3;
  border-radius: var(--r-xl);
  background: #f1f5f9;
  background: linear-gradient(145deg, color-mix(in srgb, var(--t) 16%, #fff), color-mix(in srgb, var(--t) 4%, #fff));
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border: 1px solid #e2e8f0;
  border: 1px solid color-mix(in srgb, var(--t) 18%, #fff);
  overflow: hidden;
  transition: transform .22s ease;
}
.template-card:hover .t-preview { transform: translateY(-5px) scale(1.02); }
.t-sheet {
  width: 62%;
  background: #fff;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  transform: rotate(-2deg);
}
.t-sheet-title { font-size: 12px; font-weight: 800; color: var(--t); margin-bottom: 6px; }
.template-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.template-card p { color: var(--muted); font-size: 13.5px; }

/* ==========================================================================
   受众
   ========================================================================== */

.audience-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.audience-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  padding: 28px 24px;
  text-align: center;
  transition: transform .2s, box-shadow .2s;
}
.audience-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.audience-card .emoji, .audience-card > span:first-child { font-size: 36px; line-height: 1.2; display: block; margin-bottom: 4px; }
.audience-card h3 { font-size: 17px; font-weight: 700; margin: 12px 0 6px; }
.audience-card p { color: var(--muted); font-size: 14px; }

/* ==========================================================================
   定价
   ========================================================================== */

.pricing { background: var(--bg-soft); }
.pricing-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.price-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-2xl);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform .2s, box-shadow .2s;
}
.price-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.price-card.featured {
  border: 2px solid var(--brand);
  box-shadow: var(--shadow-brand);
}
.popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(100deg, #2563eb, #7c3aed);
  color: #fff;
  font-size: 12.5px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: var(--pill);
  white-space: nowrap;
}
.price-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 14px; }
.price { display: flex; align-items: baseline; gap: 6px; margin-bottom: 24px; }
.price strong { font-size: 44px; font-weight: 800; letter-spacing: -0.03em; }
.price span { color: var(--muted); font-size: 15px; }
.price-card ul { display: flex; flex-direction: column; gap: 12px; margin-bottom: 30px; flex: 1; }
.price-card li { position: relative; padding-left: 26px; color: var(--ink-2); font-size: 15px; }
.price-card li::before {
  content: "✓";
  position: absolute; left: 0; top: 0;
  color: var(--green); font-weight: 800;
}
.price-card .btn { justify-content: center; }

/* ==========================================================================
   安全隐私
   ========================================================================== */

.security { background: var(--dark); color: #fff; overflow: hidden; }
.security-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  align-items: center;
  gap: 60px;
}
.security .eyebrow { background: rgba(37,99,235,.25); color: #93c5fd; }
.security-copy h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 28px; }
.security-copy ul { display: flex; flex-direction: column; gap: 16px; }
.security-copy li { font-size: 16px; color: #cbd5e1; display: flex; align-items: center; gap: 12px; }
.security-copy li span { font-size: 20px; }

.security-visual { position: relative; display: grid; place-items: center; height: 320px; }
.shield {
  width: 130px; height: 150px;
  background: linear-gradient(145deg, #1d4ed8, #2563eb);
  border-radius: 28px 28px 34px 34px;
  display: grid; place-items: center;
  box-shadow: 0 30px 60px -20px rgba(37,99,235,.6);
  position: relative;
  z-index: 2;
}
.shield svg { width: 72px; height: 72px; }
.ring { position: absolute; border-radius: 50%; border: 1px solid rgba(96,165,250,.35); }
.ring-1 { width: 220px; height: 220px; animation: ringpulse 3.5s ease-out infinite; }
.ring-2 { width: 320px; height: 320px; animation: ringpulse 3.5s ease-out infinite; animation-delay: 1.2s; }
@keyframes ringpulse {
  0% { transform: scale(.6); opacity: 0; }
  40% { opacity: 1; }
  100% { transform: scale(1.15); opacity: 0; }
}

/* ==========================================================================
   下载区
   ========================================================================== */

.download { text-align: center; }
.download-inner { max-width: 760px; margin: 0 auto; }
.download-inner h2 { font-size: clamp(28px, 4.5vw, 40px); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 16px; }
.download-inner > p { color: var(--muted); font-size: 18px; margin-bottom: 40px; }
.download-btns { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-bottom: 24px; }
.store-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #0f172a;
  color: #fff;
  padding: 15px 28px;
  border-radius: var(--r-l);
  transition: transform .18s, box-shadow .18s;
  box-shadow: var(--shadow-lg);
}
.store-btn:hover { transform: translateY(-3px); }
.store-btn svg { width: 26px; height: 26px; }
.store-btn small { display: block; font-size: 12px; color: #94a3b8; }
.store-btn strong { font-size: 16px; font-weight: 700; }
.download-note { font-size: 14px; color: var(--muted); }
.download-note a { color: var(--brand); font-weight: 600; }
.download-note a:hover { text-decoration: underline; }

/* ==========================================================================
   页脚
   ========================================================================== */

.footer { background: var(--bg-soft); border-top: 1px solid var(--line); padding: 64px 24px 32px; }
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p { color: var(--muted); font-size: 14px; margin-top: 16px; line-height: 1.7; }
.footer-col h4 { font-size: 14px; font-weight: 700; margin-bottom: 16px; }
.footer-col a { display: block; color: var(--muted); font-size: 14px; margin-bottom: 10px; transition: color .15s; }
.footer-col a:hover { color: var(--ink); }
.footer-bottom {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

/* ==========================================================================
   响应式
   ========================================================================== */

@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; padding-top: 20px; }
  .hero-copy .lead { margin-left: auto; margin-right: auto; }
  .hero-cta, .hero-points { justify-content: center; }
  .hero-visual { margin-top: 40px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .template-grid { grid-template-columns: repeat(2, 1fr); }
  .audience-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 460px; }
  .security-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .flow-arrow { display: none; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); row-gap: 32px; }
}

@media (max-width: 640px) {
  .nav-links, .nav-actions { display: none; }
  .menu-toggle { display: flex; margin-left: auto; }
  .nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 16px;
    right: 16px;
    background: #fff;
    border-radius: var(--r-l);
    box-shadow: var(--shadow-lg);
    padding: 16px;
    gap: 4px;
    border: 1px solid var(--line);
  }
  .nav.open .nav-links a { padding: 10px 12px; border-radius: var(--r-s); color: #475569; }
  .nav.open .nav-links a:hover { background: var(--bg-soft); color: var(--ink); }

  .hero { padding: 140px 20px 100px; }
  .phone { transform: rotate(0); }
  .fb-1 { left: -4%; }
  .fb-2 { left: -6%; }
  .fb-3 { right: -4%; }
  .feature-grid { grid-template-columns: 1fr; }
  .template-grid { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .section { padding: 72px 20px; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
}

/* 减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}