/* ============ 基础与主题 ============ */
:root {
  --bg: #0e0b0a;
  --bg-soft: #171210;
  --card: #1f1815;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f7f3f1;
  --text-dim: #b0a29a;
  --primary: #ff5330;
  --primary-2: #ff7a1e;
  --accent: #ffa71e;
  --navy: #1e2749;
  --grad: linear-gradient(120deg, #ff4438, #ff7a1e 45%, #ffa71e);
  --radius: 18px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%; /* 抑制 iOS 横屏时字号自动放大 */
  text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  cursor: pointer;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 30px rgba(255, 94, 43, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(255, 94, 43, 0.5);
}
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 14px 32px; font-size: 17px; }

/* ============ 导航栏 ============ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 14px 0;
  transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}
.navbar.scrolled,
.navbar.menu-open {
  /* 先铺高不透明底色作为 backdrop-filter 不支持时的降级 */
  background: rgba(14, 11, 10, 0.96);
  box-shadow: 0 1px 0 var(--border);
  padding: 10px 0;
}
@supports (backdrop-filter: blur(14px)) or (-webkit-backdrop-filter: blur(14px)) {
  .navbar.scrolled,
  .navbar.menu-open {
    background: rgba(14, 11, 10, 0.85);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
  }
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.logo-mark { font-size: 24px; }
.logo-img {
  width: 30px; height: 30px;
  border-radius: 8px;
  display: block;
  flex-shrink: 0;
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-links-download { display: none; }
.nav-right { display: flex; align-items: center; gap: 12px; }

/* 汉堡菜单按钮（仅移动端显示） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.navbar.menu-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
.navbar.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 150px 0 90px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  pointer-events: none;
}
.hero-glow-1 {
  width: 520px; height: 520px;
  background: #c2270f;
  top: -140px; left: -120px;
}
.hero-glow-2 {
  width: 460px; height: 460px;
  background: #b45309;
  bottom: -180px; right: -100px;
  opacity: 0.22;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 94, 43, 0.12);
  color: #ffc39e;
  font-size: 14px;
  margin-bottom: 22px;
}
.hero-badge svg { width: 16px; height: 16px; flex-shrink: 0; }
.hero h1 {
  font-size: clamp(38px, 5.2vw, 60px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: 1px;
}
.hero-sub {
  margin-top: 20px;
  color: var(--text-dim);
  font-size: 18px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  gap: 44px;
  margin-top: 44px;
}
.stat strong {
  display: block;
  font-size: 26px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat span { color: var(--text-dim); font-size: 14px; }

/* ============ 手机模型与提词演示 ============ */
.hero-phone {
  display: flex;
  justify-content: center;
  position: relative;
}
.phone-frame {
  position: relative;
  width: 300px;
  height: 633px; /* 显式高度代替 aspect-ratio，兼容旧版 Android WebView */
  border-radius: 42px;
  padding: 10px;
  background: linear-gradient(160deg, #2a2a3a, #14141f);
  box-shadow:
    0 0 0 2px rgba(255, 255, 255, 0.06),
    0 30px 80px rgba(0, 0, 0, 0.6),
    0 0 90px rgba(255, 94, 43, 0.18);
  animation: float 5s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
.phone-notch {
  position: absolute;
  top: 18px; left: 50%;
  transform: translateX(-50%);
  width: 88px; height: 22px;
  background: #0a0a10;
  border-radius: 999px;
  z-index: 5;
}
.phone-screen {
  position: relative;
  width: 100%; height: 100%;
  border-radius: 34px;
  overflow: hidden;
  background: #000;
}
.viewfinder-img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
/* 提词浮层 */
.prompter-overlay {
  position: absolute;
  top: 52px; left: 12px; right: 12px;
  height: 128px;
  border-radius: 14px;
  background: rgba(14, 10, 8, 0.72); /* 不支持毛玻璃时用更深底色保证可读性 */
  border: 1px solid rgba(255, 255, 255, 0.12);
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 22%, #000 78%, transparent);
  mask-image: linear-gradient(to bottom, transparent, #000 22%, #000 78%, transparent);
}
@supports (backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px)) {
  .prompter-overlay {
    background: rgba(14, 10, 8, 0.62);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
  }
}
.prompter-track {
  padding: 46px 14px;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.prompter-track p {
  font-size: 14px;
  line-height: 2;
  text-align: center;
  color: rgba(255, 255, 255, 0.55);
  transition: color 0.4s, transform 0.4s;
  white-space: nowrap;
}
.prompter-track p.active {
  color: #fff;
  font-weight: 700;
  transform: scale(1.06);
  text-shadow: 0 0 14px rgba(255, 94, 43, 0.9);
}
/* 录制状态条 */
.record-bar {
  position: absolute;
  top: 20px; left: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.45);
  font-size: 12px;
  color: #fff;
  z-index: 4;
}
.rec-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #ef4444;
  animation: blink 1.1s infinite;
}
@keyframes blink { 50% { opacity: 0.2; } }
.record-btn {
  position: absolute;
  bottom: 22px; left: 50%;
  transform: translateX(-50%);
  width: 58px; height: 58px;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.9);
  background: radial-gradient(circle, #ef4444 42%, transparent 46%);
}
.phone-shadow {
  position: absolute;
  bottom: -34px; left: 50%;
  transform: translateX(-50%);
  width: 220px; height: 30px;
  background: radial-gradient(ellipse, rgba(0, 0, 0, 0.55), transparent 70%);
  filter: blur(6px);
}

/* ============ 通用 Section ============ */
.section { padding: 96px 0; }
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 800;
}
.section-head p {
  margin-top: 12px;
  color: var(--text-dim);
  font-size: 17px;
}

/* ============ 痛点场景 ============ */
.scenes { background: var(--bg-soft); }
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.scene-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.scene-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 94, 43, 0.5);
}
.scene-icon {
  width: 52px; height: 52px;
  margin-bottom: 14px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--primary-2);
  background: rgba(255, 94, 43, 0.12);
  border: 1px solid rgba(255, 94, 43, 0.25);
}
.scene-icon svg { width: 26px; height: 26px; }
.scene-card h3 { font-size: 18px; margin-bottom: 8px; }
.scene-card p { color: var(--text-dim); font-size: 14.5px; }

/* ============ 功能区 ============ */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  padding: 44px 0;
}
.feature-row-rev .feature-media { order: 2; }
.feature-row-rev .feature-copy { order: 1; }
.feature-media img {
  width: min(320px, 82%);
  display: block;
  margin: 0 auto;
  border-radius: 28px;
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5), 0 0 60px rgba(255, 94, 43, 0.12);
  transition: transform 0.35s ease;
}
.feature-media img:hover { transform: scale(1.03) rotate(-0.5deg); }
.feature-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 13px;
  color: #ffc39e;
  background: rgba(255, 94, 43, 0.14);
  border: 1px solid rgba(255, 94, 43, 0.3);
  margin-bottom: 16px;
}
.feature-copy h3 {
  font-size: clamp(24px, 2.8vw, 32px);
  line-height: 1.35;
  margin-bottom: 14px;
}
.feature-copy > p { color: var(--text-dim); margin-bottom: 20px; }
.feature-list { list-style: none; }
.feature-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 10px;
  color: var(--text);
}
.feature-list li::before {
  /* 纯 CSS 对勾（边框旋转），不依赖字体字形，跨平台一致 */
  content: "";
  position: absolute;
  left: 2px;
  top: 7px;
  width: 5px;
  height: 10px;
  border-right: 2.5px solid var(--primary);
  border-bottom: 2.5px solid var(--primary);
  transform: rotate(45deg);
}

/* ============ 对比区 ============ */
.compare { background: var(--bg-soft); }
.compare-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 24px;
}
.compare-card {
  border-radius: var(--radius);
  padding: 34px 30px;
  border: 1px solid var(--border);
}
.compare-before { background: rgba(239, 68, 68, 0.06); border-color: rgba(239, 68, 68, 0.25); }
.compare-after { background: rgba(255, 94, 43, 0.08); border-color: rgba(255, 94, 43, 0.4); }
.compare-label {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.compare-ico { width: 22px; height: 22px; flex-shrink: 0; }
.ico-bad { color: #ef4444; }
.ico-good { color: #22c55e; }
.compare-card ul { list-style: none; }
.compare-card li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
  color: var(--text-dim);
}
.compare-after li { color: var(--text); }
.compare-card li:last-child { border-bottom: none; }
.compare-vs {
  align-self: center;
  font-size: 22px;
  font-weight: 900;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============ 用户评价 ============ */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.review-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.review-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 94, 43, 0.5);
}
.review-stars { display: flex; gap: 3px; }
.review-stars svg { width: 16px; height: 16px; fill: #fbbf24; }
.review-card > p { color: var(--text); flex: 1; }
.review-user { display: flex; align-items: center; gap: 12px; }
.avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  background: var(--grad);
  color: #fff;
  flex-shrink: 0;
}
.review-user strong { display: block; font-size: 15px; }
.review-user em { font-style: normal; color: var(--text-dim); font-size: 13px; }

/* ============ FAQ ============ */
.faq { background: var(--bg-soft); }
.faq-container { max-width: 760px; }
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 600;
  font-size: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-arrow {
  font-size: 22px;
  color: var(--text-dim);
  transform: rotate(90deg);
  transition: transform 0.25s;
}
.faq-item[open] .faq-arrow { transform: rotate(-90deg); }
.faq-item p {
  padding: 0 24px 20px;
  color: var(--text-dim);
}

/* ============ CTA ============ */
.cta {
  position: relative;
  text-align: center;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 300px at 50% 100%, rgba(255, 94, 43, 0.22), transparent);
  pointer-events: none;
}
.cta h2 { font-size: clamp(30px, 4vw, 46px); font-weight: 800; }
.cta p { margin-top: 14px; color: var(--text-dim); font-size: 17px; }
/* 下载二维码：白底卡片保证扫码对比度 */
.cta-qrcode {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
}
.cta-qrcode img {
  width: 168px; height: 168px;
  display: block;
  background: #fff;
  padding: 10px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.45), 0 0 50px rgba(255, 94, 43, 0.15);
}
.cta-qrcode span { color: var(--text-dim); font-size: 14px; }
.cta-actions { margin-top: 24px; display: flex; justify-content: center; }
.cta-note { font-size: 14px !important; margin-top: 18px !important; }

/* ============ 页脚 ============ */
.footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.footer-brand { font-weight: 700; font-size: 17px; display: flex; align-items: center; gap: 8px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; justify-content: center; }
.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
}
.footer-links a:hover { color: var(--text); }
.footer-copy { color: var(--text-dim); font-size: 13px; text-align: center; }
.footer-legal-link-img {
  height: 12px;
  margin-right: 4px;
  width: auto;
}
/* ============ 滚动入场动效 ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ 响应式：平板 / 窄屏 ============ */
@media (max-width: 960px) {
  /* 导航：汉堡菜单 + 下拉抽屉 */
  .nav-toggle { display: flex; }
  .nav-download { display: none; }
  .nav-links {
    position: fixed;
    top: 0; left: 0; right: 0;
    padding: 76px 6% 22px;
    flex-direction: column;
    gap: 4px;
    background: rgba(14, 11, 10, 0.98);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    transform: translateY(-110%);
    transition: transform 0.3s ease;
    z-index: -1; /* 藏在导航栏下方滑出 */
  }
  .navbar.menu-open .nav-links { transform: translateY(0); }
  .nav-links a {
    padding: 13px 4px; /* ≥44px 触控高度 */
    font-size: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links a:last-child { border-bottom: none; }
  .nav-links-download { display: block; color: #ffc39e !important; font-weight: 600; }

  /* Hero 单列居中 */
  .hero { padding: 110px 0 70px; }
  .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 56px; }
  .hero-actions, .hero-stats { justify-content: center; }
  .hero-sub { font-size: 16px; }
  .hero-glow-1 { width: 340px; height: 340px; }
  .hero-glow-2 { width: 300px; height: 300px; }

  .section { padding: 72px 0; }
  .section-head { margin-bottom: 40px; }

  .scene-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .scene-card { padding: 24px 18px; }

  .feature-row { grid-template-columns: 1fr; gap: 32px; text-align: center; padding: 30px 0; }
  .feature-row-rev .feature-media { order: 0; }
  .feature-media img { width: min(280px, 76%); }
  .feature-list { display: inline-block; text-align: left; }

  .compare-grid { grid-template-columns: 1fr; gap: 16px; }
  .compare-vs { justify-self: center; padding: 2px 0; }

  .review-grid { grid-template-columns: 1fr; gap: 16px; }

  .footer-inner { flex-direction: column; text-align: center; }
}

/* ============ 响应式：手机 ============ */
@media (max-width: 520px) {
  .container { width: 92%; }
  .hero { padding: 96px 0 60px; }
  .hero h1 { font-size: 34px; }
  .hero-badge { font-size: 13px; }
  .hero-sub br { display: none; } /* 窄屏下取消硬换行，避免碎行 */
  .hero-stats { gap: 0; justify-content: space-around; width: 100%; }
  .stat strong { font-size: 22px; }

  /* 按钮通栏，拇指好点 */
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn, .cta-actions .btn { justify-content: center; width: 100%; }
  .cta-actions { padding: 0 6%; }
  .btn-lg { padding: 15px 28px; font-size: 16px; }

  .scene-grid { grid-template-columns: 1fr; }

  .phone-frame { width: 250px; height: 528px; border-radius: 36px; }
  .phone-screen { border-radius: 28px; }
  .prompter-overlay { top: 46px; height: 112px; }
  .prompter-track { padding: 38px 10px; }
  .prompter-track p { font-size: 12.5px; }
  .record-btn { width: 50px; height: 50px; bottom: 18px; }

  .section { padding: 60px 0; }
  .section-head h2 { font-size: 26px; }
  .compare-card { padding: 26px 22px; }
  .review-card { padding: 24px 20px; }
  .faq-item summary { padding: 16px 18px; font-size: 15px; }
  .faq-item p { padding: 0 18px 16px; }

  /* 手机上无法扫自己的屏幕，隐藏二维码，直接用下载按钮 */
  .cta-qrcode { display: none; }

  .footer { padding: 28px 0 calc(28px + env(safe-area-inset-bottom)); }
  .footer-links { flex-wrap: wrap; justify-content: center; gap: 14px 22px; }
}

/* 横向窄而矮的屏幕（横屏手机）：缩小手机模型避免撑爆首屏 */
@media (max-height: 700px) and (max-width: 960px) {
  .phone-frame { width: 220px; height: 464px; }
  .prompter-overlay { top: 40px; height: 100px; }
  .prompter-track { padding: 34px 10px; }
}

/* ============ 无鼠标设备：去掉 hover 位移，避免触控闪跳 ============ */
@media (hover: none) {
  .scene-card:hover, .review-card:hover, .btn-primary:hover { transform: none; }
  .feature-media img:hover { transform: none; }
}

/* ============ 减少动态偏好：关闭装饰性动画 ============ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .phone-frame { animation: none; }
  .rec-dot { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .prompter-track { transition: none; }
}