/* ==========================================================================
   鹏宇阅读EpubReader 官网 — 主样式表
   主色：深蓝靛（品牌）  强调色：橙红（书签）
   ========================================================================== */

:root {
  --color-primary: #1b2a6b;
  --color-primary-light: #2e4bad;
  --color-primary-dark: #101a4e;
  --color-primary-deep: #0b1238;
  --color-accent: #f4753c;
  --color-accent-light: #ff8a5c;
  --color-accent-dark: #e05a22;
  --color-bg: #ffffff;
  --color-bg-soft: #f5f7fc;
  --color-bg-blue: #eef2fb;
  --color-text: #1f2937;
  --color-text-muted: #5b6472;
  --color-border: #e6e9f2;
  --gradient-hero: linear-gradient(150deg, #16215e 0%, #1b2a6b 45%, #2e4bad 100%);
  --gradient-accent: linear-gradient(135deg, #ff8a5c 0%, #f4753c 100%);
  --shadow-sm: 0 2px 8px rgba(16, 26, 78, 0.06);
  --shadow-md: 0 8px 28px rgba(16, 26, 78, 0.10);
  --shadow-lg: 0 16px 48px rgba(16, 26, 78, 0.14);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --container: 1200px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--color-primary-light); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-accent); }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

section { position: relative; }

.section-padding { padding: 96px 0; }

/* 通用区块标题 */
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-accent);
  background: rgba(244, 117, 60, 0.10);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}
.section-title { font-size: 36px; font-weight: 800; color: var(--color-primary-dark); line-height: 1.3; margin-bottom: 14px; }
.section-sub { font-size: 17px; color: var(--color-text-muted); }

/* ==========================================================================
   按钮
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.99); }

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 8px 24px rgba(244, 117, 60, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(244, 117, 60, 0.45); color: #fff; }

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
}
.btn-outline:hover { border-color: #fff; background: rgba(255, 255, 255, 0.10); color: #fff; }

.btn-ghost {
  background: var(--color-bg-blue);
  color: var(--color-primary);
}
.btn-ghost:hover { background: #e0e7f7; color: var(--color-primary-dark); }

.btn-lg { padding: 17px 40px; font-size: 17px; }
.btn-sm { padding: 9px 20px; font-size: 14px; }

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--color-primary-dark); }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.brand-text { font-size: 19px; font-weight: 800; letter-spacing: 0.5px; }
.brand-text em { font-style: normal; color: var(--color-accent); }

.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a { font-size: 15px; font-weight: 500; color: var(--color-text); position: relative; padding: 4px 0; }
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--color-accent);
  transition: width .2s ease;
}
.main-nav a:hover { color: var(--color-accent); }
.main-nav a:hover::after { width: 100%; }
.main-nav .btn { margin-left: 8px; }
.main-nav .btn::after { display: none; }
/* 顶部导航「下载 App」按钮：放大底色模块，仅作用于导航栏，不影响 .btn-sm 其它用途 */
.main-nav .btn-sm { padding: 10px 28px; font-size: 14px; }

.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: var(--color-primary-dark);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero 区
   ========================================================================== */
.hero {
  background: var(--gradient-hero);
  color: #fff;
  overflow: hidden;
  padding: 84px 0 88px;
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 360px at 12% 0%, rgba(255, 138, 92, 0.16), transparent 60%),
    radial-gradient(520px 340px at 92% 100%, rgba(78, 112, 255, 0.22), transparent 62%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: #ffd9c8;
  background: rgba(244, 117, 60, 0.16);
  border: 1px solid rgba(255, 138, 92, 0.35);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent-light); animation: pulse 1.8s infinite; }

@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(255,138,92,0.5);} 50% { box-shadow: 0 0 0 6px rgba(255,138,92,0);} }

.hero h1 { font-size: 46px; line-height: 1.22; font-weight: 800; letter-spacing: 1px; margin-bottom: 18px; }
.hero h1 .grad {
  background: linear-gradient(120deg, #ffb393, #ff8a5c);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead { font-size: 18px; color: rgba(255, 255, 255, 0.82); max-width: 520px; margin-bottom: 26px; }

.hero-price {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  margin-bottom: 28px;
  font-size: 15px;
}
.hero-price b { color: #ffb393; font-size: 18px; }
.hero-price .tag {
  font-size: 12px;
  color: #ffd9c8;
  background: rgba(244, 117, 60, 0.28);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; }

.hero-proof { display: flex; align-items: center; gap: 14px; }
.hero-proof .quote { font-size: 14px; color: rgba(255, 255, 255, 0.78); max-width: 340px; }
.hero-proof .quote b { color: #fff; }
.hero-proof .stars { color: #ffc94d; letter-spacing: 2px; font-size: 15px; margin-bottom: 4px; }

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

.phone {
  width: 300px;
  background: #0f1526;
  border-radius: 44px;
  padding: 12px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.12);
  position: relative;
  transform: perspective(1400px) rotateY(-8deg) rotateX(2deg);
  transition: transform .4s ease;
}
.phone:hover { transform: perspective(1400px) rotateY(-2deg) rotateX(1deg) translateY(-6px); }
.phone::before {
  content: "";
  position: absolute;
  top: 12px; left: 50%;
  transform: translateX(-50%);
  width: 110px; height: 24px;
  background: #0f1526;
  border-radius: var(--radius-full);
  z-index: 5;
}
.phone-screen {
  background: #ffffff;
  border-radius: 34px;
  overflow: hidden;
  height: 600px;
  display: flex;
  flex-direction: column;
}

/* 模拟 App 界面 */
.app-screen { flex: 1; background: #f5f7fc; display: flex; flex-direction: column; }
.app-topbar {
  background: var(--gradient-hero);
  color: #fff;
  padding: 44px 18px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 15px;
  font-weight: 700;
}
.app-topbar .avatar { width: 28px; height: 28px; border-radius: 50%; background: linear-gradient(135deg,#ff8a5c,#f4753c); display: flex; align-items: center; justify-content: center; font-size: 13px; }

.app-tabs { display: flex; background: #fff; border-bottom: 1px solid var(--color-border); }
.app-tabs div {
  flex: 1; text-align: center; padding: 10px 0; font-size: 13px; color: var(--color-text-muted); font-weight: 600;
  border-bottom: 2px solid transparent;
}
.app-tabs div.on { color: var(--color-primary); border-color: var(--color-primary); }

.app-books { flex: 1; padding: 14px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; align-content: start; }
.app-book { text-align: center; }
.app-book .cover {
  aspect-ratio: 3 / 4.2;
  border-radius: 8px;
  background: linear-gradient(160deg, var(--c1, #2e4bad), var(--c2, #101a4e));
  box-shadow: 0 6px 14px rgba(16, 26, 78, 0.22);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
}
.app-book .cover span {
  font-size: 9px; color: rgba(255, 255, 255, 0.85); font-weight: 600;
  width: 80%; text-align: center;
  overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}
.app-book .progress {
  height: 3px; background: #e6e9f2; border-radius: 3px; margin-top: 7px; overflow: hidden;
}
.app-book .progress i { display: block; height: 100%; background: var(--gradient-accent); border-radius: 3px; }
.app-book .title { font-size: 10px; color: var(--color-text-muted); margin-top: 5px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }

.float-card {
  position: absolute;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: floatY 3.6s ease-in-out infinite;
}
.float-card .ic {
  width: 34px; height: 34px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px;
}
.float-card small { display: block; font-weight: 400; color: var(--color-text-muted); font-size: 11px; }
.fc-1 { top: 12%; left: -18px; animation-delay: 0s; }
.fc-1 .ic { background: var(--gradient-accent); }
.fc-2 { bottom: 20%; right: -24px; animation-delay: 1.2s; }
.fc-2 .ic { background: var(--color-primary); }

@keyframes floatY { 0%,100% { transform: translateY(0);} 50% { transform: translateY(-10px);} }

/* ==========================================================================
   信任标签条
   ========================================================================== */
.trust-bar { background: #fff; border-bottom: 1px solid var(--color-border); }
.trust-bar .container { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; padding: 22px 24px; }
.trust-item { display: flex; align-items: center; gap: 10px; color: var(--color-text-muted); font-size: 14px; font-weight: 500; }
.trust-item .ic {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--color-bg-blue);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-primary); font-size: 15px;
}

/* ==========================================================================
   功能介绍
   ========================================================================== */
.features { background: var(--color-bg); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.feature-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; color: #fff;
  margin-bottom: 20px;
  background: var(--gradient-hero);
  box-shadow: 0 8px 20px rgba(27, 42, 107, 0.25);
}
.feature-card:nth-child(2) .feature-icon { background: var(--gradient-accent); box-shadow: 0 8px 20px rgba(244, 117, 60, 0.28); }
.feature-card:nth-child(3) .feature-icon { background: linear-gradient(135deg, #35c07e, #1f9d64); box-shadow: 0 8px 20px rgba(31, 157, 100, 0.25); }
.feature-card:nth-child(4) .feature-icon { background: linear-gradient(135deg, #7c6ff0, #5a48dd); box-shadow: 0 8px 20px rgba(90, 72, 221, 0.25); }
.feature-card:nth-child(5) .feature-icon { background: linear-gradient(135deg, #38b6e8, #1f8fd6); box-shadow: 0 8px 20px rgba(31, 143, 214, 0.25); }
.feature-card:nth-child(6) .feature-icon { background: linear-gradient(135deg, #f59e0b, #e07b00); box-shadow: 0 8px 20px rgba(224, 123, 0, 0.25); }
.feature-card h3 { font-size: 19px; font-weight: 700; color: var(--color-primary-dark); margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: var(--color-text-muted); }
.feature-card ul { list-style: none; margin-top: 14px; }
.feature-card ul li { font-size: 13.5px; color: var(--color-text-muted); padding: 4px 0 4px 22px; position: relative; }
.feature-card ul li::before { content: "✓"; position: absolute; left: 2px; color: var(--color-accent); font-weight: 700; }

/* ==========================================================================
   阅读体验（双列特性）
   ========================================================================== */
.experience { background: var(--color-bg-soft); overflow: hidden; }
.exp-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 64px; align-items: center; }
.exp-visual { position: relative; }
.exp-visual .reader-mock {
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.reader-toolbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--color-border); background: #fff; }
.reader-toolbar .back { width: 26px; height: 26px; border-radius: 8px; background: var(--color-bg-blue); color: var(--color-primary); display: flex; align-items: center; justify-content: center; font-size: 13px; }
.reader-toolbar .btns { display: flex; gap: 14px; color: var(--color-text-muted); font-size: 14px; }
.reader-toolbar .btns i.on { color: var(--color-accent); }
.reader-body { padding: 34px 40px; min-height: 320px; }
.reader-body .chapter-title { font-size: 20px; font-weight: 700; color: var(--color-primary-dark); margin-bottom: 20px; }
.reader-body p { font-size: 15.5px; color: #3d4653; line-height: 2.05; margin-bottom: 16px; text-align: justify; }
.reader-body .hl { background: rgba(244, 117, 60, 0.28); padding: 0 2px; border-radius: 3px; }
.reader-body .hl-green { background: rgba(31, 157, 100, 0.22); }
.reader-body .hl-blue { background: rgba(31, 143, 214, 0.22); }
.reader-body .hl-yellow { background: rgba(245, 158, 11, 0.26); }
.reader-footer { display: flex; align-items: center; justify-content: space-between; padding: 12px 18px; border-top: 1px solid var(--color-border); background: #fff; font-size: 13px; color: var(--color-text-muted); }
.reader-footer .progressbar { flex: 1; margin: 0 18px; height: 4px; background: #eef0f6; border-radius: 4px; overflow: hidden; }
.reader-footer .progressbar i { display: block; width: 64%; height: 100%; background: var(--color-primary); border-radius: 4px; }

.exp-cards { display: grid; gap: 22px; }
.exp-card { display: flex; gap: 18px; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 22px 24px; transition: transform .22s ease, box-shadow .22s ease; }
.exp-card:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }
.exp-card .ic { flex-shrink: 0; width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center; font-size: 21px; color: #fff; background: var(--gradient-hero); }
.exp-card:nth-child(2) .ic { background: var(--gradient-accent); }
.exp-card:nth-child(3) .ic { background: linear-gradient(135deg, #35c07e, #1f9d64); }
.exp-card:nth-child(4) .ic { background: linear-gradient(135deg, #7c6ff0, #5a48dd); }
.exp-card h4 { font-size: 16.5px; font-weight: 700; color: var(--color-primary-dark); margin-bottom: 4px; }
.exp-card p { font-size: 14px; color: var(--color-text-muted); }

/* ==========================================================================
   价格 / 会员
   ========================================================================== */
.pricing { background: #fff; }
.price-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; align-items: stretch; }
.price-card {
  background: var(--color-bg-soft);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  text-align: center;
  transition: transform .25s ease, box-shadow .25s ease;
  position: relative;
}
.price-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.price-card .plan { font-size: 15px; font-weight: 700; color: var(--color-text-muted); letter-spacing: 1px; }
.price-card .amount { font-size: 40px; font-weight: 800; color: var(--color-primary-dark); margin: 14px 0 4px; }
.price-card .amount small { font-size: 15px; font-weight: 600; color: var(--color-text-muted); }
.price-card .desc { font-size: 13px; color: var(--color-text-muted); margin-bottom: 18px; }
.price-card ul { list-style: none; text-align: left; margin-bottom: 22px; }
.price-card ul li { font-size: 13.5px; color: var(--color-text-muted); padding: 6px 0 6px 24px; position: relative; }
.price-card ul li::before { content: "✓"; position: absolute; left: 2px; color: var(--color-accent); font-weight: 700; }

.price-card.hot {
  background: var(--gradient-hero);
  border-color: transparent;
  transform: scale(1.04);
}
.price-card.hot .plan { color: rgba(255, 255, 255, 0.75); }
.price-card.hot .amount { color: #fff; }
.price-card.hot .amount small { color: rgba(255, 255, 255, 0.7); }
.price-card.hot .desc { color: rgba(255, 255, 255, 0.75); }
.price-card.hot ul li { color: rgba(255, 255, 255, 0.88); }
.price-card.hot ul li::before { color: #ffb393; }
.price-card .badge {
  position: absolute;
  top: -13px; left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.price-card.hot:hover { transform: scale(1.04) translateY(-6px); }
.price-note { text-align: center; margin-top: 30px; font-size: 13.5px; color: var(--color-text-muted); }
.price-note a { color: var(--color-primary-light); font-weight: 600; }

/* ==========================================================================
   用户评价
   ========================================================================== */
.testimonials { background: var(--color-bg-soft); }
.testimonial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.testimonial-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 30px;
  position: relative;
}
.testimonial-card .quote-mark { font-size: 40px; font-family: Georgia, serif; color: var(--color-accent); line-height: 1; opacity: 0.55; position: absolute; top: 22px; right: 26px; }
.testimonial-card p.text { font-size: 15px; color: #374151; margin-bottom: 20px; }
.testimonial-card .person { display: flex; align-items: center; gap: 14px; }
.testimonial-card .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px; font-weight: 700;
  background: var(--gradient-hero);
}
.testimonial-card:nth-child(2) .avatar { background: var(--gradient-accent); }
.testimonial-card:nth-child(3) .avatar { background: linear-gradient(135deg, #35c07e, #1f9d64); }
.testimonial-card:nth-child(4) .avatar { background: linear-gradient(135deg, #7c6ff0, #5a48dd); }
.testimonial-card .name { font-size: 15px; font-weight: 700; color: var(--color-primary-dark); }
.testimonial-card .meta { font-size: 12.5px; color: var(--color-text-muted); }

/* ==========================================================================
   下载区
   ========================================================================== */
.download { background: var(--gradient-hero); color: #fff; overflow: hidden; }
.download::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 320px at 85% 10%, rgba(255, 138, 92, 0.20), transparent 60%);
  pointer-events: none;
}
.download .container { position: relative; z-index: 2; text-align: center; }
.download .section-tag { background: rgba(255, 255, 255, 0.12); color: #ffb393; }
.download .section-title { color: #fff; }
.download .section-sub { color: rgba(255, 255, 255, 0.8); }

.platform-cards { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin: 48px 0 36px; }
.platform-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  min-width: 150px;
  text-align: center;
  transition: background .22s ease, transform .22s ease;
  color: #fff;
}
.platform-card:hover { background: rgba(255, 255, 255, 0.14); transform: translateY(-4px); color: #fff; }
.platform-card .p-icon { font-size: 30px; margin-bottom: 10px; }
.platform-card .p-name { font-size: 15px; font-weight: 700; }
.platform-card .p-sub { font-size: 12px; color: rgba(255, 255, 255, 0.7); }
.platform-card.hot-card { background: var(--gradient-accent); border-color: transparent; box-shadow: 0 10px 30px rgba(244, 117, 60, 0.4); }
.platform-card.hot-card:hover { background: var(--gradient-accent); }

.channel-list { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-top: 22px; }
.channel-chip {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.08);
  border: 1px dashed rgba(255, 255, 255, 0.3);
  padding: 6px 16px;
  border-radius: var(--radius-full);
}
.download .btn-primary { margin-top: 8px; }

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq { background: #fff; }
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); margin-bottom: 14px; overflow: hidden; background: #fff; }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary-dark);
  font-family: inherit;
  text-align: left;
}
.faq-q .arrow { transition: transform .25s ease; color: var(--color-accent); flex-shrink: 0; }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-a p { padding: 0 24px 22px; font-size: 14.5px; color: var(--color-text-muted); }

/* ==========================================================================
   底部 CTA
   ========================================================================== */
.cta-banner { background: var(--color-bg-blue); }
.cta-box {
  background: var(--gradient-hero);
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(500px 240px at 80% 0%, rgba(255, 138, 92, 0.25), transparent 60%);
}
.cta-box h2 { font-size: 32px; font-weight: 800; margin-bottom: 12px; position: relative; }
.cta-box p { color: rgba(255, 255, 255, 0.82); margin-bottom: 30px; position: relative; }
.cta-box .btn-primary { position: relative; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer { background: var(--color-primary-deep); color: #aeb6d4; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 44px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand img { width: 34px; height: 34px; border-radius: 8px; }
.footer-brand span { font-size: 18px; font-weight: 800; color: #fff; }
.footer-brand span em { font-style: normal; color: var(--color-accent); }
.footer-col p { font-size: 13.5px; line-height: 1.8; max-width: 300px; }
.footer-col h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 16px; letter-spacing: 1px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 13.5px; color: #aeb6d4; }
.footer-col ul a:hover { color: var(--color-accent-light); }

.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); padding: 20px 0; }
.footer-bottom .container { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13px; }
.footer-bottom .icp a { color: #8f98c0; }
.footer-bottom .icp a:hover { color: var(--color-accent-light); }
.footer-bottom .icp a + a { margin-left: 16px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: #8f98c0; font-size: 13px; }
/* 页脚底部运营者信息行（公司全称 + 注册/办公地址 + 客服邮箱） */
.footer-company {
  width: 100%;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 12.5px;
  color: #8f98c0;
  text-align: center;
  line-height: 1.9;
}
.footer-company a { color: #8f98c0; }
.footer-company a:hover { color: var(--color-accent-light); }

/* ==========================================================================
   页面头部（内页）
   ========================================================================== */
.page-hero { background: var(--gradient-hero); color: #fff; padding: 72px 0; text-align: center; position: relative; overflow: hidden; }
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 26px 26px;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: 36px; font-weight: 800; margin-bottom: 10px; }
.page-hero .crumb { font-size: 14px; color: rgba(255, 255, 255, 0.7); }
.page-hero .crumb a { color: rgba(255, 255, 255, 0.85); }
.page-hero .crumb a:hover { color: #ffb393; }

/* 文档内容 */
.doc-page { background: var(--color-bg-soft); }
.doc-wrap {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: var(--shadow-sm);
}
.doc-wrap h2 { font-size: 24px; color: var(--color-primary-dark); margin: 40px 0 14px; padding-top: 12px; border-top: 1px solid var(--color-border); }
.doc-wrap h2:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.doc-wrap h2.doc-title { font-size: 26px; border-top: none; padding-top: 0; margin: 4px 0 20px; color: var(--color-primary-dark); }
.doc-wrap h3 { font-size: 18px; color: var(--color-primary-dark); margin: 24px 0 10px; }
.doc-wrap p { font-size: 14.5px; color: #4b5563; margin-bottom: 14px; line-height: 1.9; }
.doc-wrap ul { padding-left: 22px; margin-bottom: 14px; }
.doc-wrap ul li { font-size: 14.5px; color: #4b5563; margin-bottom: 8px; line-height: 1.8; }
.doc-wrap .meta-line { font-size: 13px; color: var(--color-text-muted); padding-bottom: 20px; margin-bottom: 8px; border-bottom: 1px solid var(--color-border); }
.doc-wrap strong { color: var(--color-primary-dark); }

/* 关于我们 */
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.about-card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 32px 26px; text-align: center; transition: transform .22s ease, box-shadow .22s ease; }
.about-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.about-card .ic { width: 54px; height: 54px; border-radius: 16px; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; font-size: 25px; color: #fff; background: var(--gradient-hero); }
.about-card:nth-child(2) .ic { background: var(--gradient-accent); }
.about-card:nth-child(3) .ic { background: linear-gradient(135deg, #35c07e, #1f9d64); }
.about-card h3 { font-size: 17px; font-weight: 700; color: var(--color-primary-dark); margin-bottom: 8px; }
.about-card p { font-size: 14px; color: var(--color-text-muted); }

/* ==========================================================================
   动画
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ==========================================================================
   微信内置浏览器下载引导遮罩
   ========================================================================== */
.wechat-mask {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(11, 18, 56, 0.9);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 20px 26px;
  color: #fff;
  text-align: right;
}
.wechat-arrow { font-size: 34px; line-height: 1; margin-right: 10px; animation: floatY 1.6s ease-in-out infinite; }
.wechat-tip { margin-top: 14px; font-size: 16px; line-height: 1.9; }
.wechat-tip b { color: #ffb393; font-size: 18px; }
.wechat-close {
  margin: 28px auto 0;
  padding: 10px 30px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-full);
  font-size: 14px;
  cursor: pointer;
  transition: background .2s ease;
}
.wechat-close:hover { background: rgba(255, 255, 255, 0.14); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 56px; text-align: center; }
  .hero p.lead { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-proof { justify-content: center; }
  .hero-visual { order: -1; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .exp-grid { grid-template-columns: 1fr; gap: 40px; }
  .price-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; }
  .price-card.hot { transform: none; }
  .price-card.hot:hover { transform: translateY(-6px); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section-padding { padding: 64px 0; }
  .section-title { font-size: 28px; }
  .brand img { width: 32px; height: 32px; }
  .brand-text { font-size: 16px; letter-spacing: 0; }
  .main-nav {
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform .3s ease, opacity .3s ease;
    z-index: 99;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; }
  .main-nav a { padding: 10px 0; font-size: 16px; width: 100%; }
  .main-nav .btn { margin: 8px 0 0; width: 100%; }
  .nav-toggle { display: flex; }

  .hero { padding: 56px 0 64px; }
  .hero h1 { font-size: 32px; }
  .hero p.lead { font-size: 16px; }
  .phone { width: 240px; }
  .phone-screen { height: 480px; border-radius: 28px; }
  .phone::before { width: 84px; height: 20px; }
  .app-topbar { padding: 36px 14px 10px; font-size: 13px; }
  .float-card { font-size: 11px; padding: 9px 12px; }
  .float-card .ic { width: 28px; height: 28px; font-size: 13px; }
  .fc-1 { left: -4px; }
  .fc-2 { right: -6px; }

  .feature-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .trust-bar .container { gap: 18px; }
  .exp-grid { gap: 32px; }
  .reader-body { padding: 26px 22px; }
  .reader-body p { font-size: 14px; }
  .cta-box { padding: 44px 24px; }
  .cta-box h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .doc-wrap { padding: 28px 22px; }
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .price-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .btn-lg { padding: 16px 24px; }
}