/* ==========================================================
   Clip — 产品介绍页样式
   浅色为默认，深色跟随系统或手动切换（html[data-theme]）
   ========================================================== */

:root {
  --bg: #f6f7fa;
  --bg-elev: #ffffff;
  --bg-tint: #eef1f7;
  --text: #17181c;
  --text-2: #565d6e;
  --text-3: #8b919f;
  --border: rgba(18, 22, 38, 0.09);
  --border-strong: rgba(18, 22, 38, 0.14);
  --brand: #2f7bf6;
  --brand-deep: #1a5cd8;
  --brand-soft: rgba(47, 123, 246, 0.1);
  --brand-softer: rgba(47, 123, 246, 0.05);
  --glass: rgba(255, 255, 255, 0.74);
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05), 0 4px 14px -6px rgba(16, 24, 40, 0.08);
  --shadow-md: 0 2px 6px rgba(16, 24, 40, 0.06), 0 18px 40px -16px rgba(16, 24, 40, 0.16);
  --shadow-lg: 0 30px 80px -24px rgba(16, 24, 40, 0.28);
  --kbd-bg: linear-gradient(180deg, #ffffff, #f1f3f8);
  --kbd-border: rgba(18, 22, 38, 0.16);
  --kbd-shadow: rgba(18, 22, 38, 0.12);
  --code-bg: #f0f2f7;
  --radius-lg: 20px;
  --radius-md: 14px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --nav-h: 60px;
}

/* 深色：系统偏好（未手动指定时） */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0d13;
    --bg-elev: #14171f;
    --bg-tint: #10131b;
    --text: #f2f4f8;
    --text-2: #a7aebc;
    --text-3: #767e8f;
    --border: rgba(255, 255, 255, 0.09);
    --border-strong: rgba(255, 255, 255, 0.16);
    --brand: #6ba4ff;
    --brand-deep: #3f7ef0;
    --brand-soft: rgba(107, 164, 255, 0.14);
    --brand-softer: rgba(107, 164, 255, 0.07);
    --glass: rgba(13, 16, 23, 0.76);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 14px -6px rgba(0, 0, 0, 0.45);
    --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.32), 0 18px 40px -16px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 30px 80px -24px rgba(0, 0, 0, 0.75);
    --kbd-bg: linear-gradient(180deg, #232833, #1a1e27);
    --kbd-border: rgba(255, 255, 255, 0.16);
    --kbd-shadow: rgba(0, 0, 0, 0.5);
    --code-bg: #1a1e27;
  }
}

/* 深色：手动切换 */
:root[data-theme="dark"] {
  --bg: #0b0d13;
  --bg-elev: #14171f;
  --bg-tint: #10131b;
  --text: #f2f4f8;
  --text-2: #a7aebc;
  --text-3: #767e8f;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --brand: #6ba4ff;
  --brand-deep: #3f7ef0;
  --brand-soft: rgba(107, 164, 255, 0.14);
  --brand-softer: rgba(107, 164, 255, 0.07);
  --glass: rgba(13, 16, 23, 0.76);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 14px -6px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.32), 0 18px 40px -16px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 30px 80px -24px rgba(0, 0, 0, 0.75);
  --kbd-bg: linear-gradient(180deg, #232833, #1a1e27);
  --kbd-border: rgba(255, 255, 255, 0.16);
  --kbd-shadow: rgba(0, 0, 0, 0.5);
  --code-bg: #1a1e27;
}

/* ============ 基础 ============ */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 0.35s ease, color 0.35s ease;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: rgba(47, 123, 246, 0.22); }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

section[id] { scroll-margin-top: calc(var(--nav-h) + 16px); }

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 700;
}

p { margin: 0; }

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 25px;
  height: 24px;
  padding: 0 7px;
  border-radius: 7px;
  font-family: var(--font);
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  background: var(--kbd-bg);
  border: 1px solid var(--kbd-border);
  box-shadow: 0 1.5px 0 var(--kbd-shadow);
  vertical-align: middle;
  white-space: nowrap;
}

code {
  font-family: var(--font-mono);
  font-size: 0.86em;
}

/* ============ 导航 ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  height: var(--nav-h);
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 16.5px;
  letter-spacing: -0.01em;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-brand img { border-radius: 8px; }

.nav-links {
  display: flex;
  gap: 4px;
  margin-right: auto;
}

.nav-links a {
  position: relative;
  padding: 6px 12px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover { color: var(--text); background: var(--brand-softer); }

.nav-links a.active { color: var(--text); font-weight: 600; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 1px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 9px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-2);
  font-family: var(--font);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}

.icon-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-moon { display: none; }
}

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 92px 0 72px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(720px 420px at 82% -8%, rgba(47, 123, 246, 0.16), transparent 62%),
    radial-gradient(560px 380px at 8% 12%, rgba(47, 123, 246, 0.09), transparent 60%);
}

:root[data-theme="dark"] .hero-bg,
:root:not([data-theme="light"]) .hero-bg { opacity: 0.85; }

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 13px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.badge-version { color: var(--brand-deep); border-color: rgba(47, 123, 246, 0.3); background: var(--brand-soft); }
:root[data-theme="dark"] .badge-version { color: var(--brand); }

.badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.18);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.hero h1 {
  font-size: clamp(38px, 5.2vw, 58px);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.lead {
  font-size: 17.5px;
  color: var(--text-2);
  max-width: 560px;
  margin-bottom: 30px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.cta-row-center { justify-content: center; }

.cta-meta {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-3);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 13px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease, background 0.18s;
  white-space: nowrap;
}

.btn:active { transform: translateY(1px) scale(0.99); }

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
  box-shadow: 0 1px 2px rgba(26, 92, 216, 0.28), 0 12px 28px -10px rgba(26, 92, 216, 0.5);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 2px 4px rgba(26, 92, 216, 0.3), 0 18px 36px -10px rgba(26, 92, 216, 0.55);
}

.btn-ghost {
  color: var(--text);
  background: var(--bg-elev);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.btn-block { width: 100%; }
.btn-sm { padding: 8px 15px; font-size: 13.5px; border-radius: 10px; }

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

.hero-glow {
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 123, 246, 0.32), transparent 65%);
  filter: blur(38px);
  animation: breathe 5.5s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.85; }
  50% { transform: scale(1.12); opacity: 1; }
}

.app-icon-wrap {
  position: relative;
}

.app-icon {
  position: relative;
  width: 200px;
  height: 200px;
  border-radius: 46px;
  box-shadow:
    0 2px 6px rgba(16, 24, 40, 0.1),
    0 30px 60px -18px rgba(26, 92, 216, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
  animation: floaty 6s ease-in-out infinite;
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

.float-chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-md);
  font-size: 13px;
  font-weight: 600;
  animation: floaty 5s ease-in-out infinite;
}

.chip-key {
  top: 8px;
  right: -30px;
  gap: 4px;
  animation-delay: 0.8s;
}

.chip-key kbd { height: 22px; min-width: 22px; font-size: 12px; }

.chip-pill { padding: 6px 13px; color: var(--brand-deep); background: var(--brand-soft); border-color: rgba(47, 123, 246, 0.28); }
:root[data-theme="dark"] .chip-pill { color: var(--brand); }

.pill-text { bottom: 58px; left: -46px; animation-delay: 1.6s; }
.pill-img { bottom: 18px; left: -24px; animation-delay: 2.4s; }
.pill-link { top: 78px; left: -52px; animation-delay: 3.2s; }

/* Hero 截图 */
.hero-shot { margin-top: 64px; }

.shot-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  background: var(--bg-elev);
  transition: transform 0.4s cubic-bezier(0.2, 0.7, 0.3, 1), box-shadow 0.4s;
}

.shot-frame:hover { transform: translateY(-4px); }

.shot-frame img { width: 100%; height: auto; }

.shot-caption {
  margin-top: 14px;
  text-align: center;
  font-size: 13px;
  color: var(--text-3);
}

/* ============ 通用 section ============ */
.section { padding: 96px 0; }
.section-tint { background: var(--bg-tint); }
.section-download {
  background:
    radial-gradient(900px 480px at 50% -10%, var(--brand-softer), transparent 70%),
    var(--bg);
}

.section-head {
  max-width: 640px;
  margin-bottom: 52px;
}

.eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--brand-deep);
  margin-bottom: 12px;
}

:root[data-theme="dark"] .eyebrow { color: var(--brand); }

.section-head h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 14px; }

.section-lead { color: var(--text-2); font-size: 16.5px; margin-top: 4px; }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

/* 卡片 */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.3, 1), box-shadow 0.3s, border-color 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
  box-shadow: 0 8px 18px -8px rgba(26, 92, 216, 0.55);
}

.card h3 { font-size: 17.5px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--text-2); }

/* ============ 引入段 ============ */
.intro { padding: 72px 0 8px; }

.intro-inner {
  max-width: 760px;
  text-align: center;
}

.intro-quote {
  font-size: clamp(20px, 2.6vw, 25px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.5;
  margin-bottom: 20px;
}

.intro-text { color: var(--text-2); font-size: 16.5px; }

/* ============ 快捷键 ============ */
.shortcuts-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
}

.keys-demo { margin-top: 34px; }

.keys-bar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 16px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
}

.keys-sep {
  width: 1px;
  height: 18px;
  background: var(--border-strong);
  margin: 0 6px;
}

.table-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.keys-table { width: 100%; border-collapse: collapse; }

.keys-table tr + tr td { border-top: 1px solid var(--border); }

.keys-table td {
  padding: 13px 22px;
  font-size: 14.5px;
  vertical-align: middle;
}

.keys-table td:first-child {
  width: 132px;
  white-space: nowrap;
  color: var(--text);
}

.keys-table td:last-child { color: var(--text-2); }

.keys-table tbody tr { transition: background 0.2s; }
.keys-table tbody tr:hover { background: var(--brand-softer); }

/* ============ 截图画廊 ============ */
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.showcase-grid .shot:first-child { grid-column: 1 / -1; }

.shot { margin: 0; }

.shot figcaption {
  margin-top: 12px;
  font-size: 13.5px;
  color: var(--text-3);
  text-align: center;
}

/* ============ 下载 ============ */
.download-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 28px;
  align-items: start;
}

.dl-card {
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-md);
}

.dl-card-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.dl-card-head img { border-radius: 13px; box-shadow: var(--shadow-sm); }
.dl-card-head h3 { font-size: 19px; }
.dl-card-head p { font-size: 13px; color: var(--text-3); margin-top: 2px; }

.dl-meta { margin: 0 0 22px; display: grid; gap: 12px; }

.dl-meta > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 13.5px;
}

.dl-meta dt { color: var(--text-3); flex-shrink: 0; }
.dl-meta dd { margin: 0; font-weight: 600; text-align: right; }

.dl-sha {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 10px 12px;
  border-radius: 11px;
  background: var(--code-bg);
  border: 1px solid var(--border);
}

.dl-sha-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-3);
  flex-shrink: 0;
}

.dl-sha code {
  flex: 1;
  font-size: 10.5px;
  color: var(--text-2);
  word-break: break-all;
  line-height: 1.5;
}

.dl-verify {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-3);
}

.dl-verify code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--code-bg);
  font-size: 11px;
}

.dl-all {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand-deep);
  text-decoration: none;
  transition: gap 0.2s;
}

.dl-all:hover { gap: 10px; }
:root[data-theme="dark"] .dl-all { color: var(--brand); }

/* 步骤 */
.step-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.step {
  position: relative;
  display: flex;
  gap: 16px;
  padding: 20px 22px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.step:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }

.step-highlight {
  border-color: rgba(47, 123, 246, 0.35);
  background: linear-gradient(180deg, var(--brand-softer), var(--bg-elev) 60%);
}

.step-num {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
  box-shadow: 0 6px 14px -6px rgba(26, 92, 216, 0.6);
}

.step-body h4 { font-size: 15.5px; margin-bottom: 6px; }
.step-body p { font-size: 14px; color: var(--text-2); }
.step-body p + p { margin-top: 8px; }

.code-block {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 11px 44px 11px 14px;
  border-radius: 11px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  overflow-x: auto;
}

.code-block code {
  font-size: 12.5px;
  color: var(--text);
  white-space: nowrap;
}

.code-block .copy-btn { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); }

.code-block-lg {
  position: relative;
  margin: 14px 0;
  padding: 16px 44px 16px 16px;
  border-radius: 12px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  overflow-x: auto;
}

.code-block-lg pre { margin: 0; }
.code-block-lg code { font-size: 12.5px; line-height: 1.8; color: var(--text); white-space: pre; }

.code-block-lg .copy-btn { position: absolute; right: 8px; top: 8px; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-3);
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.copy-btn:hover { color: var(--brand-deep); border-color: rgba(47, 123, 246, 0.4); }
:root[data-theme="dark"] .copy-btn:hover { color: var(--brand); }
.copy-btn.copied { color: #16a34a; border-color: rgba(22, 163, 74, 0.4); }

.note-card {
  display: flex;
  gap: 13px;
  padding: 17px 19px;
  border-radius: var(--radius-md);
  background: var(--brand-softer);
  border: 1px solid rgba(47, 123, 246, 0.22);
}

.note-icon { color: var(--brand-deep); flex-shrink: 0; margin-top: 2px; }
:root[data-theme="dark"] .note-icon { color: var(--brand); }
.note-card p { font-size: 13.5px; color: var(--text-2); }

/* ============ 隐私 ============ */
.priv-item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
}

.priv-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.priv-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-deep);
  background: var(--brand-soft);
  border: 1px solid rgba(47, 123, 246, 0.2);
}

:root[data-theme="dark"] .priv-icon { color: var(--brand); }

.priv-item h3 { font-size: 16px; margin-bottom: 7px; }
.priv-item p { font-size: 14px; color: var(--text-2); }

/* ============ 开源 ============ */
.os-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.os-stack h3, .os-build h3 { font-size: 18px; margin-bottom: 16px; }

.os-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.os-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  color: var(--text-2);
}

.os-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
}

.os-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.os-tags span {
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-2);
  background: var(--bg-tint);
  border: 1px solid var(--border);
}

.os-build p { font-size: 14.5px; color: var(--text-2); }

.os-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ============ 结尾 CTA ============ */
.final-cta {
  padding: 104px 0;
  text-align: center;
  background:
    radial-gradient(640px 300px at 50% 100%, var(--brand-soft), transparent 72%),
    var(--bg-tint);
  border-top: 1px solid var(--border);
}

.final-inner img {
  margin: 0 auto 22px;
  border-radius: 18px;
  box-shadow: 0 20px 44px -14px rgba(26, 92, 216, 0.5);
}

.final-cta h2 { font-size: clamp(26px, 3.4vw, 34px); margin-bottom: 12px; }
.final-cta p { color: var(--text-2); margin-bottom: 28px; }

/* ============ 页脚 ============ */
.footer {
  padding: 40px 0 44px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-inner { text-align: center; }

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 10px;
}

.footer-brand img { border-radius: 6px; }

.footer-line { font-size: 13px; color: var(--text-3); margin-bottom: 6px; }

.footer-copy { font-size: 12.5px; color: var(--text-3); }
.footer-copy a { color: var(--text-2); text-decoration: none; border-bottom: 1px solid var(--border-strong); }
.footer-copy a:hover { color: var(--brand-deep); }

/* ============ Toast ============ */
.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translate(-50%, 16px);
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s cubic-bezier(0.2, 0.7, 0.3, 1);
  z-index: 200;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ============ 进场动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .app-icon, .float-chip, .hero-glow, .badge .dot { animation: none; }
}

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .hero { padding-top: 64px; }
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-copy { text-align: center; }
  .lead { margin-left: auto; margin-right: auto; }
  .cta-row { justify-content: center; }
  .badges { justify-content: center; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .shortcuts-grid { grid-template-columns: 1fr; gap: 36px; }
  .download-grid { grid-template-columns: 1fr; }
  .dl-card { position: static; }
  .os-grid { grid-template-columns: 1fr; }
  .section { padding: 76px 0; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .nav-inner { padding: 0 20px; gap: 14px; }
  .nav-links { display: none; }
  .nav-links a { padding: 6px 8px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .showcase-grid { grid-template-columns: 1fr; }
  .hero-shot { margin-top: 44px; }
  .chip-key { right: -6px; }
  .pill-text { left: -8px; }
  .pill-img { left: -4px; }
  .pill-link { left: -14px; }
  .app-icon { width: 150px; height: 150px; border-radius: 34px; }
  .hero-glow { width: 250px; height: 250px; }
  .keys-table td { padding: 12px 16px; }
  .keys-table td:first-child { width: 108px; }
  .step { padding: 17px 18px; }
  .section { padding: 64px 0; }
  .final-cta { padding: 76px 0; }
}