:root {
  --bg-page: #FBFAFF;
  --bg-soft: #F4F1FC;
  --bg-card: #FFFFFF;
  --border: #E7E1F6;
  --border-strong: #D8CFF0;
  --primary: #7C5CF0;
  --primary-dark: #6444D6;
  --primary-soft: #F0EBFE;
  --primary-softer: #F7F4FE;
  --pink: #F070BD;
  --pink-soft: #FDEDF7;
  --text: #171029;
  --text-secondary: #4B4363;
  --text-tertiary: #857CA0;
  --success: #2FA96B;
  --warn: #E08A1E;
  --danger: #E04A6E;
  --shadow-sm: 0 1px 3px rgba(60, 40, 120, .06);
  --shadow: 0 6px 20px rgba(60, 40, 120, .08);
  --shadow-lg: 0 18px 48px rgba(60, 40, 120, .12);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --transition: all .25s cubic-bezier(.25, .1, .25, 1);
  --container: 1120px;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-page);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

.container { width: calc(100% - 48px); max-width: var(--container); margin-inline: auto; }

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(251, 250, 255, .86);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.02em;
  white-space: nowrap;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 3px 10px rgba(124, 92, 240, .22);
  transition: transform var(--transition), box-shadow var(--transition);
}
.logo:hover .logo-icon {
  transform: scale(1.06);
  box-shadow: 0 6px 18px rgba(124, 92, 240, .32);
}
.navbar-nav { display: flex; align-items: center; gap: 2px; list-style: none; flex-shrink: 0; }
.nav-link {
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); background: var(--primary-soft); }
.nav-link.active { color: var(--primary); background: var(--primary-soft); font-weight: 600; }
.nav-cta {
  margin-left: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}
.nav-cta {
  background: linear-gradient(135deg, var(--pink), var(--primary));
  box-shadow: 0 4px 14px rgba(124, 92, 240, .26);
}
.nav-cta:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(124, 92, 240, .36);
}
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--primary);
  cursor: pointer;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 104px 0 76px;
  text-align: center;
  background: linear-gradient(180deg, #FFFFFF 0%, #F7F4FE 100%);
  border-bottom: 1px solid var(--border);
}
.hero::before {
  content: "";
  position: absolute;
  top: -280px;
  left: 50%;
  transform: translateX(-50%);
  width: 760px;
  height: 620px;
  background: radial-gradient(circle, rgba(124, 92, 240, .14), transparent 68%);
  pointer-events: none;
}
.hero > .container { position: relative; }
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(124, 92, 240, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 92, 240, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .7), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .7), transparent 78%);
  pointer-events: none;
}
.hero-label {
  display: inline-block;
  padding: 5px 16px;
  margin-bottom: 18px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
}
.hero h1 {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -.035em;
  line-height: 1.15;
  margin-bottom: 18px;
}
.hero h1 .accent {
  background: linear-gradient(120deg, var(--pink), var(--primary) 62%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-bottom: .08em;
  display: inline-block;
}
.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
}
.hero p strong { color: var(--text); font-weight: 600; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.page-header {
  position: relative;
  overflow: hidden;
  padding: 84px 0 56px;
  text-align: center;
  background: linear-gradient(180deg, #FFFFFF 0%, #F7F4FE 100%);
  border-bottom: 1px solid var(--border);
}
.page-header::before {
  content: "";
  position: absolute;
  top: -240px;
  left: 50%;
  transform: translateX(-50%);
  width: 640px;
  height: 480px;
  background: radial-gradient(circle, rgba(240, 112, 189, .12), transparent 68%);
  pointer-events: none;
}
.page-header > .container { position: relative; }
.page-header .label {
  display: inline-block;
  padding: 5px 16px;
  margin-bottom: 16px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.page-header h1 { font-size: 42px; font-weight: 800; letter-spacing: -.035em; line-height: 1.2; margin-bottom: 12px; }
.page-header p { font-size: 17px; color: var(--text-secondary); max-width: 660px; margin-inline: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 28px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -.01em;
  cursor: pointer;
  transition: var(--transition);
}
.btn-filled {
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  box-shadow: 0 4px 14px rgba(124, 92, 240, .26);
}
.btn-filled:hover {
  background: linear-gradient(135deg, var(--pink), var(--primary-dark));
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(124, 92, 240, .34);
}
.btn-tinted { background: var(--primary-soft); color: var(--primary); }
.btn-tinted:hover { background: #E6DEFD; }
.btn-plain { background: var(--bg-card); color: var(--primary); border-color: #C9BCEA; box-shadow: var(--shadow-sm); }
.btn-plain:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 22px rgba(124, 92, 240, .18); }
.btn-sm { padding: 9px 20px; font-size: 13px; }

.section { padding: 72px 0; }
.section-tint { background: var(--bg-soft); border-block: 1px solid var(--border); }
.section-head { margin-bottom: 40px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-head h2 { font-size: 34px; font-weight: 800; letter-spacing: -.03em; line-height: 1.3; margin-bottom: 10px; }
.section-head p { font-size: 16px; color: var(--text-secondary); max-width: 620px; }

.section-title::before, .section-title::after {
  content: "";
  width: 40px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--primary));
}
.section-title::after { background: linear-gradient(90deg, var(--primary), transparent); }

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.stat-item {
  position: relative;
  text-align: center;
  padding: 10px 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.stat-item:hover { background: var(--primary-softer); }
.stat-item + .stat-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22%;
  bottom: 22%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--border), transparent);
}
.stat-num { font-size: 38px; font-weight: 800; letter-spacing: -.04em; line-height: 1.1; background: linear-gradient(135deg, var(--pink), var(--primary)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { font-size: 13px; color: var(--text-tertiary); margin-top: 4px; }

.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.feat-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.feat-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 17px;
  transition: var(--transition);
}
.feat-card:hover .feat-no {
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  transform: scale(1.06);
}
.feat-card h3 { font-size: 18px; font-weight: 700; letter-spacing: -.015em; margin-bottom: 8px; }
.feat-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.feat-card p a { color: var(--primary); font-weight: 500; }
.feat-card p a:hover { text-decoration: underline; }

.detail-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.detail-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: var(--transition);
}
.detail-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--pink), var(--primary));
}
.detail-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.dc-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.dc-icon {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.detail-card:hover .dc-icon { background: linear-gradient(135deg, var(--pink), var(--primary)); color: #fff; }
.detail-card h3 { font-size: 19px; font-weight: 700; letter-spacing: -.02em; }
.dc-status { padding: 3px 10px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-size: 11px; font-weight: 700; }
.detail-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }
.detail-card ul { list-style: none; }
.detail-card ul li {
  position: relative;
  padding: 5px 0 5px 18px;
  font-size: 13px;
  color: var(--text-secondary);
}
.detail-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--primary));
}

.plat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.plat-grid--few { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); max-width: 720px; }
.plat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 16px;
  text-align: center;
  transition: var(--transition);
}
.plat-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.plat-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: 16px;
  background: var(--primary-softer);
  color: var(--primary);
  font-size: 24px;
  transition: var(--transition);
}
.plat-card:hover .plat-icon {
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  transform: translateY(-2px);
}
.plat-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.plat-card p { font-size: 12px; color: var(--text-tertiary); margin-bottom: 14px; }
.plat-card .btn { width: 100%; }

.dl-channels {
  display: flex;
  width: fit-content;
  gap: 4px;
  margin: 0 auto 36px;
  padding: 5px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
  justify-content: center;
}
.ch-tab {
  padding: 9px 24px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.ch-tab:hover { color: var(--primary); background: var(--primary-softer); }
.ch-tab.active {
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  box-shadow: 0 6px 16px rgba(124, 92, 240, .3);
}
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.dl-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: var(--transition);
}
.dl-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.dl-card-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.dl-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--primary-softer);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  transition: var(--transition);
}
.dl-card:hover .dl-card-icon { background: var(--primary-soft); transform: scale(1.06); }
.dl-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 3px; }
.dl-meta { font-size: 12px; color: var(--text-tertiary); }
.dl-card .btn { margin-top: auto; align-self: stretch; }




.tut-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tut-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: var(--transition);
}
.tut-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.tut-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  font-size: 17px;
  box-shadow: 0 6px 18px rgba(124, 92, 240, .24);
  transition: var(--transition);
}
.tut-card:hover .tut-no { transform: scale(1.06) rotate(-4deg); }
.tut-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 7px; letter-spacing: -.015em; }
.tut-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 14px; }
.tut-meta { display: flex; align-items: center; gap: 10px; margin-top: auto; font-size: 12px; color: var(--text-tertiary); }
.tut-tag { padding: 3px 10px; border-radius: 999px; font-size: 11px; font-weight: 700; }
.t-easy { background: var(--primary-soft); color: var(--primary); }
.t-mid { background: var(--pink-soft); color: #C24E96; }
.t-hard { background: #FDF0E6; color: var(--warn); }

.tut-detail { margin-bottom: 48px; }
.tut-detail h3 { font-size: 22px; font-weight: 800; letter-spacing: -.025em; margin-bottom: 8px; }
.step-num-list { list-style: none; margin: 18px 0 0; }
.step-num-list li {
  position: relative;
  padding: 15px 20px 15px 56px;
  margin-bottom: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.step-num-list li::before {
  content: attr(data-step);
  position: absolute;
  left: 16px;
  top: 15px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
}
.step-num-list li strong { color: var(--text); }

.code-block {
  position: relative;
  background: #221B3A;
  color: #E4DEFA;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 13px;
  line-height: 1.9;
  overflow-x: auto;
  margin: 16px 0;
  white-space: pre-wrap;
  word-break: break-word;
  border: 1px solid rgba(124, 92, 240, .22);
  box-shadow: 0 12px 34px rgba(34, 27, 58, .22);
}
.code-block::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 16px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #FF5F57;
  box-shadow: 18px 0 0 #FEBC2E, 36px 0 0 #28C840;
}
.code-block .cmt { color: #9C8FD0; }
.info-box {
  padding: 15px 20px;
  margin: 16px 0 0;
  background: var(--primary-softer);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 13px;
  color: var(--text-secondary);
}
.info-box strong { color: var(--text); }

.guide-block { margin-bottom: 44px; }
.guide-block-title { font-size: 24px; font-weight: 800; letter-spacing: -.025em; margin-bottom: 20px; }
.guide-step {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.guide-step:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.step-badge {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  margin-top: 2px;
}
.step-badge .fab { font-size: 15px; }
.step-body h4 { font-size: 16px; font-weight: 700; margin-bottom: 5px; }
.step-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.75; }
.step-body code, .faq-a-inner code {
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--primary-softer);
  color: var(--primary);
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 12.5px;
}
.note-block {
  padding: 14px 20px;
  margin-top: 16px;
  background: var(--pink-soft);
  border-left: 3px solid var(--pink);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.note-block p { font-size: 14px; color: var(--text-secondary); line-height: 1.75; }
.note-block strong { color: var(--text); }

.faq-wrap { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 32px; box-shadow: var(--shadow-sm); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: background .18s;
}
.faq-q:hover { background: var(--primary-softer); }
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 19px;
  font-weight: 400;
  line-height: 28px;
  text-align: center;
  transition: transform .3s cubic-bezier(.34, 1.56, .64, 1), background .25s, color .25s;
}
.faq-item.open .faq-icon {
  transform: rotate(135deg);
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
}
.faq-a { height: 0; overflow: hidden; transition: height .32s ease; }
.faq-item.open .faq-a { height: auto; }
.faq-a-inner { padding: 20px 24px; font-size: 14px; color: var(--text-secondary); line-height: 1.85; }
.faq-a-inner strong { color: var(--text); }
.faq-a-inner a { color: var(--primary); }
.faq-a-inner a:hover { text-decoration: underline; }
.faq-group-title { font-size: 20px; font-weight: 800; letter-spacing: -.02em; margin: 36px 0 16px; display: flex; align-items: center; gap: 10px; }
.faq-group-title::before { content: ""; width: 4px; height: 20px; border-radius: 2px; background: linear-gradient(180deg, var(--pink), var(--primary)); }

.privacy-block { margin-bottom: 24px; padding: 26px 28px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.privacy-block h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.privacy-block p, .privacy-block li { font-size: 14px; color: var(--text-secondary); line-height: 1.85; }
.privacy-block ul { padding-left: 20px; list-style: disc; margin-top: 8px; }
.privacy-block li { margin-bottom: 7px; }
.privacy-block li::marker { color: var(--primary); }
.privacy-block a { color: var(--primary); }
.privacy-block a:hover { text-decoration: underline; }

.inset-group { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 20px; box-shadow: var(--shadow-sm); }
.inset-item { display: flex; align-items: flex-start; gap: 14px; padding: 16px 22px; border-bottom: 1px solid var(--border); transition: background .18s; }
.inset-item:last-child { border-bottom: none; }
.inset-item:hover { background: var(--primary-softer); }
.inset-item:hover .inset-icon { transform: scale(1.08); }
.inset-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}
.inset-icon.brand { background: linear-gradient(135deg, var(--pink), var(--primary)); color: #fff; }

.about-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.about-card { padding: 26px 20px; text-align: center; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); transition: var(--transition); }
.about-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.about-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 14px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  font-size: 19px;
  box-shadow: 0 6px 18px rgba(124, 92, 240, .22);
  transition: var(--transition);
}
.about-card:hover .about-no { transform: translateY(-3px) scale(1.05); }
.about-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 5px; }
.about-card p { font-size: 12.5px; color: var(--text-secondary); }

.release-list { display: flex; flex-direction: column; gap: 14px; }
.release { padding: 22px 26px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); transition: var(--transition); }
.release:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.release:first-child { border-color: var(--primary); box-shadow: 0 8px 26px rgba(124, 92, 240, .12); }
.release__head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin-bottom: 10px; }
.release__ver { font-size: 19px; font-weight: 800; color: var(--primary); letter-spacing: -.01em; }
.release__date { font-size: 13px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }
.release__ver { font-variant-numeric: tabular-nums; }
.release__tag { padding: 3px 11px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-size: 11px; font-weight: 700; }
.release__notes { margin: 0; padding-left: 20px; color: var(--text-secondary); font-size: 14px; line-height: 1.85; }
.release__notes li { margin-bottom: 4px; }
.release__notes li::marker { color: var(--primary); }

.friends-wrap { padding: 40px 0; background: var(--bg-soft); border-top: 1px solid var(--border); }
.friends-wrap h3 { font-size: 16px; font-weight: 700; text-align: center; margin-bottom: 20px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.friends-wrap h3::before, .friends-wrap h3::after { content: ""; width: 36px; height: 1px; background: linear-gradient(90deg, transparent, var(--border-strong)); }
.friends-wrap h3::after { background: linear-gradient(90deg, var(--border-strong), transparent); }
.friends-list { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.friends-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13.5px;
  transition: var(--transition);
}
.friends-list a i { color: var(--primary); font-size: 13px; transition: var(--transition); }
.friends-list a:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 6px 18px rgba(124, 92, 240, .14);
  transform: translateY(-2px);
}
.friends-list a:hover i { transform: scale(1.15); }

.footer { background: #1B1430; color: #B9B2CF; padding: 60px 0 22px; }
.footer-inner { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { color: #fff; margin-bottom: 14px; font-size: 17px; }
.footer-brand .logo-icon { width: 28px; height: 28px; box-shadow: 0 3px 10px rgba(0, 0, 0, .3); }
.footer-brand p { font-size: 13px; line-height: 1.85; max-width: 300px; }
.footer-links h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer-links ul { list-style: none; }
.footer-links ul li { margin-bottom: 9px; }
.footer-links ul li a { font-size: 13.5px; color: #B9B2CF; transition: var(--transition); }
.footer-links ul li a { display: inline-block; transition: color var(--transition), transform var(--transition); }
.footer-links ul li a:hover { color: #fff; transform: translateX(3px); }
.footer-bottom { padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .09); text-align: center; font-size: 12.5px; color: #837B9B; }
.footer-bottom a { color: #A99BE8; }
.footer-bottom a:hover { text-decoration: underline; }

.dl-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(27, 20, 48, .5);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.dl-modal-overlay.active { display: flex; }
.dl-modal {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 34px 30px;
  text-align: center;
  animation: modalIn .28s cubic-bezier(.25, .1, .25, 1);
}
@keyframes modalIn { from { opacity: 0; transform: scale(.95) translateY(14px); } to { opacity: 1; transform: none; } }
.dl-modal-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 16px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--pink), var(--primary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  box-shadow: 0 10px 28px rgba(124, 92, 240, .3);
}
.dl-modal h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; letter-spacing: -.02em; }
.dl-modal p { font-size: 14px; color: var(--text-secondary); margin-bottom: 10px; }
.dl-modal .dl-filename { display: inline-block; padding: 6px 16px; margin-bottom: 18px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-size: 12.5px; font-weight: 600; word-break: break-all; }
.dl-modal-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }

.text-secondary-md { font-size: 15px; color: var(--text-secondary); }
.text-primary-strong { color: var(--primary); font-weight: 600; }
.text-primary-strong:hover { text-decoration: underline; }
.text-tertiary { color: var(--text-tertiary); }
.text-tertiary-md { font-size: 14px; color: var(--text-tertiary); margin-bottom: 24px; }
.text-body { font-size: 15px; color: var(--text-secondary); line-height: 1.85; }
.text-body strong { color: var(--text); }
.title-lg { font-size: 28px; font-weight: 800; letter-spacing: -.03em; margin-bottom: 14px; }
.title-ios { font-size: 20px; font-weight: 700; text-align: center; margin-bottom: 16px; color: var(--text); }
.lead-center { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.lead-narrow { max-width: 760px; margin: 0 auto; }
.list-note { padding: 22px 24px 22px 44px; font-size: 14px; color: var(--text-secondary); line-height: 2; }
.list-note li { margin-bottom: 4px; }
.list-note li::marker { color: var(--primary); font-weight: 700; }
.list-note li { margin-bottom: 4px; }
.list-note li::marker { color: var(--primary); font-weight: 700; }
.code-box { background: #221B3A; color: #E4DEFA; border-radius: var(--radius); padding: 26px 28px; font-family: 'SF Mono', Consolas, monospace; font-size: 13.5px; line-height: 2; overflow-x: auto; }
.code-box .text-tertiary { color: #9C8FD0; }
.pad-center-lg { text-align: center; padding: 40px 0 56px; }
.mt-12 { margin-top: 12px; }
.mt-40 { margin-top: 40px; }
.mt-44 { margin-top: 44px; }
.center-mt-40 { text-align: center; margin-top: 40px; }
.flex-1 { flex: 1; }
.text-label { font-size: 15px; font-weight: 600; }
.hint-xs { font-size: 13px; color: var(--text-tertiary); margin-top: 3px; }
.hint-xs a { color: var(--primary); }
.hint-xs a:hover { text-decoration: underline; }
.fs-16 { font-size: 16px; }
.cursor-pointer { cursor: pointer; }
.overflow-x-auto { overflow-x: auto; }
.shadow-pink { box-shadow: 0 10px 34px rgba(240, 112, 189, .16); border-color: #F3D3E8; }

@media (max-width: 1024px) {
  .feat-grid, .tut-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid,   .dl-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: repeat(2, 1fr); }
  .plat-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .section-head h2 { font-size: 29px; }
}
@media (max-width: 860px) {
  .navbar .container { position: relative; }
  .mobile-menu-btn { display: flex; }
  .navbar-nav {
    position: absolute;
    top: 64px;
    left: -24px;
    right: -24px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 24px 20px;
    background: #FFFFFF;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    visibility: hidden;
    pointer-events: none;
    transition: transform .3s ease, visibility .3s;
  }
  .navbar-nav.active, .navbar-nav.open { transform: none; visibility: visible; pointer-events: auto; }
  .navbar-nav .nav-link { padding: 11px 14px; }
  .nav-cta { margin: 8px 0 0; text-align: center; }
  .hero { padding: 84px 0 60px; }
  .hero h1 { font-size: 34px; }
  .hero p { font-size: 16px; }
  .page-header { padding: 68px 0 48px; }
  .page-header h1 { font-size: 31px; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 25px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); padding: 24px; gap: 14px; }
  .stat-num { font-size: 30px; }
  .plat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; gap: 30px; }
  .faq-q { padding: 16px 18px; font-size: 14.5px; }
  .faq-a-inner { padding: 18px; }
  .spec-table { display: block; width: 100%; overflow-x: auto; }
  .spec-table th, .spec-table td { white-space: nowrap; }
}
@media (max-width: 560px) {
  .container { width: calc(100% - 32px); }
  .feat-grid, .tut-grid, .dl-grid, .about-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
  .page-header h1 { font-size: 25px; }
  .section-head h2, .section-title, .guide-block-title, .tut-detail h3 { font-size: 20px; }
  .feat-card, .detail-card, .tut-card, .compare-col, .dl-card { padding: 22px; }
  .stats-row { grid-template-columns: 1fr 1fr; padding: 20px 16px; }
  .stat-num { font-size: 26px; }
  .plat-grid { grid-template-columns: 1fr; }
  .faq-q { padding: 14px 16px; }
  .faq-a-inner { padding: 16px; }
  .privacy-block, .release { padding: 20px; }
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: #CFC6E8; border-radius: 5px; border: 2px solid var(--bg-soft); }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

::selection { background: rgba(124, 92, 240, .18); color: var(--text); }


/* ========== 内容扩充组件 ========== */



.para-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.para-grid--3 { grid-template-columns: repeat(3, 1fr); }

.para-card {
  padding: 24px 26px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.para-card:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.para-card h3 { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; margin-bottom: 10px; letter-spacing: -.015em; }
.para-card h3 i { color: var(--primary); font-size: 15px; }
.para-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin: 0; }
.para-card p + p { margin-top: 10px; }

.check-list { list-style: none; padding: 0; }
.check-list li {
  position: relative;
  padding: 9px 0 9px 30px;
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-bottom: 1px solid var(--border);
}
.check-list li:last-child { border-bottom: none; }
.check-list li::before {
  content: "\f00c";
  position: absolute;
  left: 0;
  top: 12px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-family: "Font Awesome 5 Free";
  font-weight: 900;
  font-size: 9px;
  line-height: 18px;
  text-align: center;
}
.check-list--cross li::before { content: "\f00d"; background: #FDE8EE; color: var(--danger); }
.check-list li strong { color: var(--text); font-weight: 600; }

.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.spec-table th, .spec-table td { padding: 13px 20px; text-align: left; border-bottom: 1px solid var(--border); }
.spec-table thead th { background: var(--primary-softer); color: var(--primary); font-weight: 700; font-size: 13px; letter-spacing: .02em; }
.spec-table tbody tr:last-child td { border-bottom: none; }
.spec-table tbody tr:hover td { background: var(--primary-softer); }
.spec-table td:first-child { color: var(--text); font-weight: 600; }
.spec-table .yes { color: var(--success); font-weight: 700; }
.spec-table .no { color: var(--text-tertiary); }

.callout {
  padding: 18px 22px;
  margin: 18px 0;
  background: var(--primary-softer);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.callout h4 { display: flex; align-items: center; gap: 9px; font-size: 15.5px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.callout h4 i { color: var(--primary); }
.callout p { font-size: 14px; color: var(--text-secondary); line-height: 1.85; margin: 0; }
.callout p + p { margin-top: 9px; }
.callout--warn { background: #FFF7EC; border-color: #F7DFC0; border-left-color: var(--warn); }
.callout--warn h4 i { color: var(--warn); }
.callout--pink { background: var(--pink-soft); border-color: #F6D6E9; border-left-color: var(--pink); }
.callout--pink h4 i { color: var(--pink); }
.callout--center { max-width: 660px; margin-left: auto; margin-right: auto; }

.kv-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.kv-item { padding: 20px 22px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.kv-item__k { font-size: 13px; color: var(--text-tertiary); margin-bottom: 6px; }
.kv-item__v { font-size: 16px; font-weight: 700; color: var(--text); letter-spacing: -.015em; }
.kv-item__d { font-size: 13px; color: var(--text-secondary); margin-top: 6px; line-height: 1.7; }

.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; border-radius: 2px; background: linear-gradient(180deg, var(--pink), var(--primary), transparent); }
.timeline__item { position: relative; margin-bottom: 26px; }
.timeline__item:last-child { margin-bottom: 0; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--primary);
}
.timeline__t { font-size: 13px; font-weight: 700; color: var(--primary); letter-spacing: .04em; margin-bottom: 5px; }
.timeline__h { font-size: 16.5px; font-weight: 700; margin-bottom: 7px; letter-spacing: -.015em; }
.timeline__p { font-size: 14px; color: var(--text-secondary); line-height: 1.85; }
.timeline__p strong { color: var(--text); }

.compare-cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.compare-col { padding: 26px 28px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.compare-col--win { border-color: var(--primary); box-shadow: 0 10px 32px rgba(124, 92, 240, .14); }
.compare-col h3 { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; margin-bottom: 14px; letter-spacing: -.02em; }
.compare-col h3 i { color: var(--primary); font-size: 16px; }
.compare-col--win h3 { color: var(--primary); }
.compare-col p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 14px; }

.faq-addon { margin-top: 14px; padding: 18px 22px; background: var(--primary-softer); border: 1px dashed var(--border-strong); border-radius: var(--radius); text-align: center; }
.faq-addon p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }

.glossary { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.glossary__item { padding: 18px 20px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.glossary__item dt { font-size: 14.5px; font-weight: 700; color: var(--text); margin-bottom: 5px; display: flex; align-items: center; gap: 8px; }
.glossary__item dt i { color: var(--primary); font-size: 13px; }
.glossary__item dd { font-size: 13.5px; color: var(--text-secondary); line-height: 1.75; margin: 0; }

@media (max-width: 1024px) {
  .para-grid, .para-grid--3, .compare-cols, .glossary { grid-template-columns: 1fr; }
  }
@media (max-width: 560px) {
    .para-card, .compare-col, .kv-item { padding: 20px; }
}
.tag-ios { display: inline-block; margin-right: 8px; padding: 2px 9px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-size: 11px; font-weight: 700; }


/* ========== 返回顶端 ========== */
.to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--primary);
  font-family: inherit;
  font-size: 16px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  box-shadow: 0 10px 28px rgba(60, 40, 120, .16);
  transition: opacity .28s ease, transform .28s ease, visibility .28s,
    background .22s ease, color .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.to-top:hover {
  background: linear-gradient(135deg, var(--pink), var(--primary));
  border-color: transparent;
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(124, 92, 240, .34);
}
.to-top:active { transform: translateY(-1px); }
.to-top i { transition: transform .28s ease; line-height: 1; }
.to-top:hover i { transform: translateY(-2px); }
.to-top__ring {
  position: absolute;
  inset: -1px;
  border-radius: 50%;
  background: conic-gradient(var(--primary) var(--to-top-progress, 0%), transparent 0);
  opacity: 0;
  transition: opacity .28s ease;
  z-index: -1;
}
.to-top--progress .to-top__ring { opacity: .28; }
.to-top:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

@media (max-width: 860px) {
  .to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; font-size: 15px; }
}
@media (max-width: 560px) {
  .to-top { right: 14px; bottom: 14px; width: 40px; height: 40px; font-size: 14px; }
}

.js .reveal { opacity: 0; }
.js .reveal.in { opacity: 1; }