/*
  落笔 Nextype — 官网 v3
  风格：Linear / Vercel 工具风（亮色）
  字体：系统字体栈，与各端 App 保持一致
  色彩：严格遵循全局 Design Context（#007AFF / #1D1D1F）
*/

/* ── Token ── */
:root {
  --white:   #FFFFFF;
  --bg:      #F5F5F7;
  --text:    #1D1D1F;
  --text-2:  #555560;
  --text-3:  #8E8E93;
  --accent:  #007AFF;
  --accent-h:#0066DD;
  --border:  rgba(0,0,0,0.09);
  --border-s:rgba(0,0,0,0.06);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
          "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--white);
  color: var(--text);
  line-height: 1.5;
  overflow-x: hidden;
}

/* ── 布局 ── */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ── 字体工具类 ── */
.t-medium { font-weight: 500; color: var(--text); }
.t-normal { font-weight: 400; }
.t-muted  { color: var(--text-3); margin-left: 5px; }

/* ══════════════════════════════
   导航
══════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 0.5px solid var(--border);
}

.nav-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0;
  font-size: 0.9375rem;
}

.nav-logo {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  object-fit: cover;
  margin-right: 8px;
}

/* ── 胶囊按钮基础 ── */
.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover { background: var(--accent-h); }

/* ══════════════════════════════
   Hero
══════════════════════════════ */
.hero {
  padding: 120px 0 80px;
  background: var(--white);
}

.hero-inner {
  display: grid;
  grid-template-columns: 55fr 45fr;
  gap: 48px;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  background: #007AFF;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 22px;
  letter-spacing: 0;
  text-transform: none;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.08;
  color: var(--text);
  margin-bottom: 20px;
}

.hero-desc {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--text-2);
  line-height: 1.65;
  margin-bottom: 36px;
}

/* ── 产品示意图 ── */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual svg {
  width: 100%;
  max-width: 480px;
  height: auto;
  border-radius: 16px;
}

/* ── 下载按钮组 ── */
.dl-group {
  display: flex;
  justify-content: flex-start;
  gap: 10px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.dl-segment {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

/* ── 信任信号 ── */
.trust-signals {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.trust-signal {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9375rem;
  color: var(--text-3);
  font-weight: 400;
}

.trust-signal svg {
  color: var(--text-3);
  flex-shrink: 0;
}

.dl-row {
  display: flex;
  gap: 10px;
}

.dl-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 12px 20px;
  min-width: 108px;
  background: var(--white);
  border: 0.5px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
  font-family: var(--font);
}

.dl-btn:not(.dl-disabled):hover {
  border-color: rgba(0,0,0,0.2);
  box-shadow: 0 2px 10px rgba(0,0,0,0.07);
}

.dl-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.dl-primary:hover {
  background: var(--accent-h) !important;
  border-color: var(--accent-h) !important;
}

.dl-icon {
  width: 20px;
  height: 20px;
  margin-bottom: 6px;
  flex-shrink: 0;
}

.dl-primary .dl-icon { color: #fff; }
.dl-btn:not(.dl-primary):not(.dl-disabled) .dl-icon { color: var(--text-2); }

.dl-platform {
  font-size: 0.875rem;
  font-weight: 600;
  color: inherit;
  line-height: 1;
}
.dl-btn:not(.dl-primary):not(.dl-disabled) .dl-platform { color: var(--text); }

.dl-sub {
  font-size: 0.6875rem;
  color: inherit;
  opacity: 0.7;
  line-height: 1;
}
.dl-btn:not(.dl-primary) .dl-sub { color: var(--text-3); opacity: 1; }

/* ── 置灰 Windows ── */
.dl-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  color: var(--text-2);
}

.dl-badge {
  font-size: 0.625rem;
  font-weight: 500;
  color: var(--text-3);
  background: var(--bg);
  border-radius: 999px;
  padding: 2px 7px;
  margin-top: 2px;
  letter-spacing: 0.01em;
}

/* ── 特性 pills ── */
.feature-pills {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 13px;
  background: var(--bg);
  border: 0.5px solid var(--border);
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--text-2);
  font-weight: 400;
  letter-spacing: 0.005em;
}

/* ══════════════════════════════
   如何开始
══════════════════════════════ */
.second-screen {
  background: var(--bg);
  border-top: 0.5px solid var(--border-s);
  padding: 72px 0 80px;
}

.second-screen .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.col-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  text-align: center;
  margin-bottom: 48px;
}

/* ── 步骤 ── */
.steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 540px;
}

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-num {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  padding-top: 2px;
  min-width: 22px;
}

.step-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 5px;
  letter-spacing: -0.01em;
}

.step-desc {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* ══════════════════════════════
   用户说
══════════════════════════════ */
.quotes-section {
  background: var(--white);
  border-top: 0.5px solid var(--border-s);
  padding: 72px 0 80px;
}

.quotes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.quote {
  padding: 24px;
  background: var(--bg);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  border: 0.5px solid transparent;
  transform: translateY(0);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.quote:hover {
  background: var(--white);
  border-color: var(--border);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.quote-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.quote-avatar {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--av-bg, #E3F0FF);
  color: var(--av-color, #007AFF);
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}

.quote-avatar::before {
  content: attr(data-initials);
}

.quote-avatar img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.quote-name {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.quote-role {
  font-size: 0.8125rem;
  color: var(--text-3);
}

.quote p {
  font-size: 1.0625rem;
  color: var(--text-2);
  line-height: 1.75;
}


/* ══════════════════════════════
   页脚
══════════════════════════════ */
.footer {
  background: var(--white);
  border-top: 0.5px solid var(--border-s);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
}

.footer-logo {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  object-fit: cover;
  margin-right: 8px;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-3);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-link {
  font-size: 0.8rem;
  color: var(--text-3);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-link:hover { color: var(--text-2); }

.footer-dl {
  font-size: 0.875rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s;
}
.footer-dl:hover { color: var(--accent-h); }

/* ══════════════════════════════
   进场动画（极轻）
══════════════════════════════ */
@keyframes up {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-label    { animation: up .45s ease-out .05s both; }
.hero-title    { animation: up .5s  ease-out .1s  both; }
.hero-desc     { animation: up .5s  ease-out .17s both; }
.dl-group      { animation: up .5s  ease-out .23s both; }
.trust-signals { animation: up .5s  ease-out .28s both; }
.hero-visual   { animation: up .6s  ease-out .15s both; }

/* ══════════════════════════════
   响应式
══════════════════════════════ */
@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    order: 1;
  }

  .hero-copy {
    order: 2;
  }
}

@media (max-width: 860px) {
  .quotes-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 680px) {
  .hero-title { letter-spacing: -0.025em; }

  .dl-btn { min-width: 90px; padding: 10px 14px; }

  .trust-signals { gap: 14px; }

  .footer-inner { flex-direction: column; text-align: center; gap: 8px; }
}

@media (max-width: 420px) {
  .dl-row { gap: 8px; }
  .dl-btn { min-width: 80px; padding: 10px 12px; }
}

/* ══════════════════════════════
   无障碍：减少动效
══════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}