/* ==========================================================
   快连电脑版 KLINK for Desktop - 全站样式（浅色版）
   设计要点：留白 / 柔和渐变 / Bento 网格 / 悬浮胶囊导航
   ========================================================== */

:root {
  --bg: #fbfcfe;
  --bg-soft: #f4f7fb;
  --card: #ffffff;
  --ink: #0d1424;
  --ink-2: #33415a;
  --muted: #6b7a90;
  --muted-2: #93a0b3;
  --line: #e7ecf3;
  --line-2: #dfe6f0;
  --brand: #4c5cf5;
  --brand-deep: #3a48d8;
  --teal: #0bc5b8;
  --brand-soft: #eef0ff;
  --mint-soft: #e6faf7;
  --cream: #fff7ec;
  --rose-soft: #fff0f3;
  --grad: linear-gradient(115deg, #4c5cf5 0%, #6b7bff 45%, #0bc5b8 100%);
  --grad-soft: linear-gradient(135deg, #f0f2ff 0%, #f7fbff 50%, #e9fbf8 100%);
  --radius-lg: 26px;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 2px 6px rgba(16, 24, 40, 0.05), 0 18px 40px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 30px 70px rgba(20, 32, 60, 0.12);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font-family: inherit; }

.container { width: min(1160px, 90%); margin: 0 auto; }
.container-wide { width: min(1280px, 92%); margin: 0 auto; }

::selection { background: rgba(76, 92, 245, 0.16); }

/* ---------------- 悬浮胶囊导航 ---------------- */
.nav-shell {
  position: fixed; top: 0; left: 0; right: 0; z-index: 300;
  padding: 14px 0;
  transition: padding 0.3s var(--ease);
  pointer-events: none;
}
.nav-shell.scrolled { padding: 8px 0; }

.nav-pill {
  pointer-events: auto;
  display: flex; align-items: center; gap: 24px;
  height: 64px; padding: 0 12px 0 20px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(231, 236, 243, 0.9);
  border-radius: 20px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.03), 0 10px 30px rgba(20, 32, 60, 0.06);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  transition: box-shadow 0.3s, background 0.3s;
}
.nav-shell.scrolled .nav-pill {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 14px 36px rgba(20, 32, 60, 0.10);
}

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 11px;
  background: var(--grad);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 17px;
  box-shadow: 0 6px 16px rgba(76, 92, 245, 0.28);
}
.brand-text { line-height: 1.15; }
.brand-text strong { display: block; font-size: 17px; letter-spacing: 0.5px; }
.brand-text span { display: block; font-size: 10px; letter-spacing: 1.8px; color: var(--muted-2); }

.nav-links { margin-left: auto; display: flex; gap: 2px; }
.nav-links a {
  padding: 8px 14px; font-size: 14.5px; color: var(--ink-2);
  border-radius: 10px; transition: 0.22s;
}
.nav-links a:hover { background: var(--bg-soft); color: var(--ink); }
.nav-links a.active { color: var(--brand); background: var(--brand-soft); font-weight: 600; }

.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-toggle {
  display: none; width: 42px; height: 42px; border-radius: 12px;
  border: 1px solid var(--line); background: #fff; cursor: pointer;
}
.nav-toggle i {
  display: block; width: 18px; height: 1.6px; background: var(--ink);
  margin: 4px auto; border-radius: 2px; transition: 0.26s;
}

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 12px 24px; border-radius: 12px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.22s var(--ease), box-shadow 0.22s, background 0.22s, border-color 0.22s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--brand); color: #fff;
  box-shadow: 0 8px 20px rgba(76, 92, 245, 0.24);
}
.btn-primary:hover { background: var(--brand-deep); transform: translateY(-1px); box-shadow: 0 12px 26px rgba(76, 92, 245, 0.3); }
.btn-outline { background: #fff; border-color: var(--line-2); color: var(--ink); }
.btn-outline:hover { border-color: var(--brand); color: var(--brand); background: #fcfcff; }
.btn-soft { background: var(--brand-soft); color: var(--brand); }
.btn-soft:hover { background: #e5e8ff; }
.btn-sm { padding: 9px 18px; font-size: 14px; border-radius: 10px; }
.btn-lg { padding: 15px 32px; font-size: 16px; border-radius: 14px; }
.btn-block { width: 100%; }
.btn-white { background: #fff; color: var(--brand); box-shadow: 0 10px 24px rgba(10, 20, 40, 0.16); }
.btn-white:hover { transform: translateY(-1px); box-shadow: 0 14px 30px rgba(10, 20, 40, 0.22); }

/* ---------------- 通用区块 ---------------- */
.section { padding: 96px 0; position: relative; }
.section-sm { padding: 64px 0; }
.section-soft { background: var(--bg-soft); }
.section-white { background: #fff; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; letter-spacing: 2px;
  color: var(--brand); background: var(--brand-soft);
  padding: 5px 13px; border-radius: 999px; margin-bottom: 20px;
}
.eyebrow.green { color: #0a9e93; background: var(--mint-soft); }

.sec-head { max-width: 720px; margin-bottom: 52px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head h2 {
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.3; letter-spacing: -0.3px; font-weight: 700;
}
.sec-head p { margin-top: 16px; color: var(--muted); font-size: 16.5px; line-height: 1.85; }

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

/* ---------------- 首页 Hero ---------------- */
.hero {
  position: relative; padding: 148px 0 96px; overflow: hidden;
  background:
    radial-gradient(820px 420px at 88% -6%, rgba(76, 92, 245, 0.10), transparent 62%),
    radial-gradient(680px 400px at 4% 22%, rgba(11, 197, 184, 0.09), transparent 66%),
    linear-gradient(180deg, #fdfdff 0%, #fbfcfe 100%);
}
.hero .container { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 54px; align-items: center; }

.hero h1 {
  font-size: clamp(32px, 4.4vw, 54px);
  line-height: 1.22; letter-spacing: -0.8px; font-weight: 800;
}
.hero h1 em { font-style: normal; display: block; }
.hero-lead {
  margin: 22px 0 30px; color: var(--ink-2); font-size: 17px; line-height: 1.9;
  max-width: 520px;
}
.hero-lead strong { color: var(--ink); font-weight: 600; }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-os { font-size: 13px; color: var(--muted-2); margin-top: 14px; }

.hero-proof {
  display: flex; align-items: center; gap: 14px;
  margin-top: 40px; padding-top: 26px;
  border-top: 1px solid var(--line);
}
.avatars { display: flex; }
.avatars span {
  width: 32px; height: 32px; border-radius: 50%;
  border: 2px solid #fff; margin-left: -9px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; color: #fff; font-weight: 600;
}
.avatars span:first-child { margin-left: 0; }
.avatars span:nth-child(1) { background: #8b95f9; }
.avatars span:nth-child(2) { background: #5dd6cb; }
.avatars span:nth-child(3) { background: #f4b26a; }
.avatars span:nth-child(4) { background: #9aa7bd; }
.hero-proof p { font-size: 13.5px; color: var(--muted); }
.hero-proof strong { color: var(--ink); font-weight: 600; }

/* 桌面客户端模拟窗 */
.app-window {
  position: relative;
  background: #fff; border-radius: 22px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.app-window::after {
  content: ""; position: absolute; inset: 0; border-radius: 22px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  pointer-events: none;
}
.win-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; background: #fbfcfe;
  border-bottom: 1px solid var(--line);
}
.win-dots { display: flex; gap: 6px; }
.win-dots i { width: 10px; height: 10px; border-radius: 50%; display: block; }
.win-dots i:nth-child(1) { background: #ffb3ad; }
.win-dots i:nth-child(2) { background: #ffd88f; }
.win-dots i:nth-child(3) { background: #a8e6c4; }
.win-title { font-size: 12px; color: var(--muted-2); margin-left: 6px; }

.win-body { display: grid; grid-template-columns: 62px 1fr; }

.win-side {
  border-right: 1px solid var(--line);
  padding: 14px 0; display: flex; flex-direction: column;
  align-items: center; gap: 14px; background: #fcfdff;
}
.win-side i {
  width: 32px; height: 32px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-style: normal; color: var(--muted);
}
.win-side i.on { background: var(--brand-soft); color: var(--brand); }

.win-main { padding: 22px 24px 24px; }
.win-status {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px;
}
.win-status .label { font-size: 12.5px; color: var(--muted); }
.win-status .state {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: #0a9e93; background: var(--mint-soft);
  padding: 3px 10px; border-radius: 999px; font-weight: 600;
}
.win-status .state b {
  width: 6px; height: 6px; border-radius: 50%; background: var(--teal);
  animation: blink 2s infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.gauge-row { display: flex; align-items: center; gap: 22px; margin-bottom: 20px; }
.gauge {
  width: 116px; height: 116px; border-radius: 50%; flex-shrink: 0;
  background: conic-gradient(var(--brand) 0deg, var(--teal) 260deg, #eef1f7 260deg 360deg);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  transition: background 1s var(--ease);
}
.gauge::before {
  content: ""; position: absolute; inset: 9px; background: #fff; border-radius: 50%;
  box-shadow: inset 0 2px 10px rgba(20, 32, 60, 0.05);
}
.gauge-inner { position: relative; text-align: center; }
.gauge-inner b { display: block; font-size: 25px; font-weight: 800; letter-spacing: -0.5px; }
.gauge-inner span { font-size: 10.5px; color: var(--muted-2); }

.gauge-info { flex: 1; }
.gauge-info .big { font-size: 30px; font-weight: 800; letter-spacing: -0.6px; }
.gauge-info .big small { font-size: 13px; font-weight: 500; color: var(--muted); margin-left: 4px; }
.gauge-info .sub { font-size: 12.5px; color: var(--muted); margin-top: 2px; }

.mini-nodes { display: grid; gap: 9px; }
.mini-node {
  display: grid; grid-template-columns: 80px 1fr 48px;
  align-items: center; gap: 10px; font-size: 12px; color: var(--ink-2);
}
.mini-node .track { height: 5px; border-radius: 999px; background: #eff2f8; overflow: hidden; }
.mini-node .track i {
  display: block; height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, #6b7bff, #0bc5b8);
  width: 0; transition: width 1.3s var(--ease);
}
.mini-node em { font-style: normal; text-align: right; color: #0a9e93; font-size: 11.5px; }

.win-foot {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line);
  font-size: 11.5px; color: var(--muted-2);
}
.win-foot .pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px; background: var(--bg-soft);
  color: var(--ink-2); font-size: 11px;
}

/* 浮动装饰 */
.float-card {
  position: absolute; background: #fff; border-radius: 14px;
  box-shadow: var(--shadow-md); padding: 12px 16px;
  border: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px;
  font-size: 12.5px; z-index: 3;
  animation: floaty 5s ease-in-out infinite;
}
.float-card .ico {
  width: 30px; height: 30px; border-radius: 9px;
  display: flex; align-items: center; justify-content: center; font-size: 15px;
  background: var(--mint-soft);
}
.float-card strong { display: block; font-size: 13.5px; }
.float-card span { color: var(--muted); font-size: 11px; }
.float-a { top: -18px; right: -14px; }
.float-b { bottom: -20px; left: -20px; animation-delay: 1.4s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

/* ---------------- 信任条 ---------------- */
.trust-bar {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: #fff;
}
.trust-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 26px; padding: 26px 0; flex-wrap: wrap;
}
.trust-inner p { font-size: 13px; color: var(--muted-2); letter-spacing: 1px; }
.trust-items { display: flex; gap: 44px; flex-wrap: wrap; }
.trust-items li { font-size: 14px; color: var(--ink-2); font-weight: 500; display: flex; align-items: center; gap: 7px; }
.trust-items li::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--teal);
}

/* ---------------- Bento 网格 ---------------- */
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.bento-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px; position: relative; overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s, border-color 0.35s;
}
.bento-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #d8e0ee; }
.bento-card h3 { font-size: 18.5px; margin-bottom: 10px; letter-spacing: -0.2px; }
.bento-card p { font-size: 14.5px; color: var(--muted); line-height: 1.85; }
.bento-card .ico {
  width: 46px; height: 46px; border-radius: 13px;
  display: flex; align-items: center; justify-content: center;
  font-size: 21px; margin-bottom: 18px;
  background: var(--brand-soft);
}
.span-3 { grid-column: span 3; }
.span-2 { grid-column: span 2; }
.span-4 { grid-column: span 4; }
.card-tint-blue { background: linear-gradient(150deg, #f2f4ff 0%, #ffffff 62%); }
.card-tint-mint { background: linear-gradient(150deg, #eafaf7 0%, #ffffff 62%); }
.card-tint-cream { background: linear-gradient(150deg, #fff8ee 0%, #ffffff 62%); }
.bento-card .big-num {
  font-size: 44px; font-weight: 800; letter-spacing: -1.5px; line-height: 1;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.bento-card .big-num small { font-size: 16px; font-weight: 600; }
.bento-card .cap { font-size: 12.5px; color: var(--muted-2); margin-top: 6px; }

/* 迷你图示 */
.chip-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.chip-row span {
  font-size: 12px; color: var(--ink-2); background: var(--bg-soft);
  padding: 4px 11px; border-radius: 999px; border: 1px solid var(--line);
}
.split-visual {
  display: flex; align-items: center; gap: 10px; margin-top: 18px;
  padding: 14px; border-radius: 14px; background: #fbfcfe; border: 1px solid var(--line);
}
.split-visual .track2 { flex: 1; height: 30px; border-radius: 8px; background: #eef1f7; position: relative; overflow: hidden; }
.split-visual .track2 i {
  position: absolute; inset: 0; width: 62%;
  background: repeating-linear-gradient(45deg, #dfe5f2, #dfe5f2 6px, #eef1f7 6px, #eef1f7 12px);
}
.split-visual .track3 { flex: 0 0 34%; height: 30px; border-radius: 8px; background: var(--mint-soft); position: relative; overflow: hidden; }
.split-visual .track3 i { position: absolute; inset: 0; background: linear-gradient(90deg, #9be4dd, #d8f7f2); }
.split-visual small { font-size: 10.5px; color: var(--muted-2); position: absolute; bottom: 2px; right: 6px; }

/* ---------------- 特性左右交替 ---------------- */
.feature-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px;
  align-items: center; padding: 52px 0;
}
.feature-row + .feature-row { border-top: 1px solid var(--line); }
.feature-row.reverse .fr-text { order: 2; }
.feature-row.reverse .fr-visual { order: 1; }

.fr-text .tag {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 1px;
  color: var(--brand); background: var(--brand-soft);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 16px;
}
.fr-text h3 { font-size: 28px; letter-spacing: -0.4px; margin-bottom: 14px; line-height: 1.35; }
.fr-text p { color: var(--muted); font-size: 15.5px; line-height: 1.9; }
.fr-list { margin-top: 22px; display: grid; gap: 12px; }
.fr-list li {
  display: flex; gap: 10px; font-size: 14.8px; color: var(--ink-2);
  align-items: flex-start;
}
.fr-list li::before {
  content: "✓"; flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%;
  background: var(--mint-soft); color: #0a9e93;
  font-size: 11px; display: flex; align-items: center; justify-content: center;
  margin-top: 3px; font-weight: 700;
}

.fr-visual {
  border-radius: var(--radius-lg); border: 1px solid var(--line);
  background: var(--grad-soft); padding: 30px;
  min-height: 300px; display: flex; align-items: center; justify-content: center;
}
.mock-panel {
  background: #fff; border-radius: 16px; border: 1px solid var(--line);
  box-shadow: var(--shadow-md); width: 100%; overflow: hidden;
}
.mock-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--line); background: #fcfdff;
  font-size: 12.5px; color: var(--muted);
}
.mock-head b { color: var(--ink); font-size: 13px; font-weight: 600; }
.mock-body { padding: 18px; display: grid; gap: 12px; }
.mock-line { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--ink-2); }
.mock-line .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); flex-shrink: 0; }
.mock-line .bar { flex: 1; height: 6px; border-radius: 999px; background: #eef1f7; overflow: hidden; }
.mock-line .bar i { display: block; height: 100%; background: linear-gradient(90deg, #6b7bff, #0bc5b8); }
.mock-line em { font-style: normal; color: var(--muted-2); font-size: 11.5px; width: 44px; text-align: right; }

.toggle-demo {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-radius: 12px; background: #fbfcfe;
  border: 1px solid var(--line); font-size: 13px;
}
.switch {
  width: 42px; height: 24px; border-radius: 999px; background: var(--brand);
  position: relative; flex-shrink: 0;
}
.switch::after {
  content: ""; position: absolute; top: 3px; right: 3px;
  width: 18px; height: 18px; border-radius: 50%; background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}
.switch.off { background: #dfe5f0; }
.switch.off::after { right: auto; left: 3px; }

/* ---------------- 步骤 ---------------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; position: relative; }
.steps::before {
  content: ""; position: absolute; top: 40px; left: 12%; right: 12%;
  border-top: 1.5px dashed #d8e0ee; z-index: 0;
}
.step-card {
  position: relative; z-index: 1; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm);
}
.step-num {
  width: 42px; height: 42px; border-radius: 12px;
  background: var(--grad); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; margin-bottom: 18px;
  box-shadow: 0 6px 16px rgba(76, 92, 245, 0.22);
}
.step-card h3 { font-size: 17.5px; margin-bottom: 8px; }
.step-card p { font-size: 14.3px; color: var(--muted); }

/* ---------------- 对比表 ---------------- */
.table-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
}
.table-scroll { overflow-x: auto; }
table.cmp { width: 100%; border-collapse: collapse; min-width: 700px; font-size: 14.5px; }
table.cmp th, table.cmp td { padding: 16px 22px; text-align: left; border-bottom: 1px solid var(--line); }
table.cmp thead th {
  background: #fafbfe; font-size: 13.5px; color: var(--ink-2); font-weight: 600;
  white-space: nowrap;
}
table.cmp thead th.hl { color: var(--brand); background: var(--brand-soft); }
table.cmp td:first-child { color: var(--ink-2); }
table.cmp tbody tr:last-child td { border-bottom: none; }
table.cmp tbody tr:hover { background: #fcfdff; }
table.cmp .yes { color: #0a9e93; font-weight: 600; }
table.cmp .no { color: #c2ccdb; }

/* ---------------- 价格 ---------------- */
.price-toggle {
  display: inline-flex; gap: 4px; padding: 4px; border-radius: 12px;
  background: #eef1f7; margin: 0 auto 44px;
}
.price-toggle button {
  border: none; background: transparent; padding: 8px 20px;
  border-radius: 9px; font-size: 14px; color: var(--muted); cursor: pointer;
  transition: 0.22s;
}
.price-toggle button.active { background: #fff; color: var(--ink); font-weight: 600; box-shadow: 0 1px 3px rgba(16, 24, 40, 0.1); }
.toggle-wrap { text-align: center; }

.plans { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: stretch; }
.plan {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px 26px; display: flex; flex-direction: column;
  transition: transform 0.3s var(--ease), box-shadow 0.3s, border-color 0.3s;
}
.plan:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.plan.featured {
  border-color: transparent; position: relative;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(135deg, #4c5cf5, #0bc5b8) border-box;
  border: 1.5px solid transparent;
  box-shadow: 0 20px 46px rgba(76, 92, 245, 0.14);
}
.plan.featured::after {
  content: "推荐"; position: absolute; top: 16px; right: 16px;
  font-size: 11px; font-weight: 700; color: #fff;
  background: var(--brand); padding: 3px 10px; border-radius: 999px;
}
.plan h3 { font-size: 18px; }
.plan .who { font-size: 12.8px; color: var(--muted); margin-top: 5px; min-height: 36px; }
.plan .price { display: flex; align-items: baseline; gap: 5px; margin: 14px 0 2px; }
.plan .price b { font-size: 36px; font-weight: 800; letter-spacing: -1px; }
.plan .price span { font-size: 13px; color: var(--muted); }
.plan .pay-note { font-size: 12.3px; color: var(--muted-2); margin-bottom: 20px; }
.plan ul { display: grid; gap: 10px; margin-bottom: 24px; flex: 1; }
.plan li { font-size: 14px; color: var(--ink-2); padding-left: 22px; position: relative; }
.plan li::before {
  content: "✓"; position: absolute; left: 0; top: 1px;
  color: var(--teal); font-weight: 700; font-size: 12px;
}

/* ---------------- 评价 ---------------- */
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.quote-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm);
}
.quote-card .mark { font-size: 30px; color: #dde3f0; line-height: 1; margin-bottom: 6px; }
.quote-card p { font-size: 14.6px; color: var(--ink-2); line-height: 1.9; }
.quote-user { display: flex; align-items: center; gap: 11px; margin-top: 20px; }
.quote-user .ava {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: #fff; font-weight: 600;
}
.quote-user strong { display: block; font-size: 13.8px; }
.quote-user span { font-size: 12px; color: var(--muted-2); }

/* ---------------- FAQ ---------------- */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  margin-bottom: 10px; overflow: hidden; transition: border-color 0.25s, box-shadow 0.25s;
}
.faq-item.open { border-color: #cfd8ea; box-shadow: var(--shadow-sm); }
.faq-q {
  width: 100%; text-align: left; border: none; background: none;
  padding: 20px 54px 20px 22px; font-size: 15.8px; font-weight: 500;
  color: var(--ink); cursor: pointer; position: relative;
}
.faq-q::after {
  content: ""; position: absolute; right: 22px; top: 50%;
  width: 9px; height: 9px; border-right: 1.8px solid var(--muted);
  border-bottom: 1.8px solid var(--muted);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.28s;
}
.faq-item.open .faq-q::after { transform: translateY(-30%) rotate(-135deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s var(--ease); }
.faq-a p { padding: 0 22px 20px; color: var(--muted); font-size: 14.6px; line-height: 1.9; }

/* ---------------- CTA ---------------- */
.cta {
  border-radius: 28px; padding: 66px 44px; text-align: center;
  background: linear-gradient(125deg, #4654ec 0%, #5f6ffa 42%, #0bbdae 100%);
  color: #fff; position: relative; overflow: hidden;
  box-shadow: 0 30px 70px rgba(58, 72, 216, 0.28);
}
.cta::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 18% 20%, rgba(255, 255, 255, 0.22), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(255, 255, 255, 0.16), transparent 44%);
}
.cta > * { position: relative; }
.cta h2 { font-size: clamp(24px, 3vw, 36px); letter-spacing: -0.3px; }
.cta p { color: rgba(255, 255, 255, 0.86); margin: 14px auto 30px; max-width: 560px; font-size: 15.5px; }
.cta .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta .fine { font-size: 12.5px; color: rgba(255, 255, 255, 0.7); margin-top: 20px; }

/* ---------------- 内页标题区 ---------------- */
.page-head {
  padding: 140px 0 56px; position: relative; overflow: hidden;
  background:
    radial-gradient(700px 300px at 85% 0%, rgba(76, 92, 245, 0.09), transparent 60%),
    linear-gradient(180deg, #fdfdff, var(--bg));
}
.page-head .crumb { font-size: 13px; color: var(--muted-2); margin-bottom: 16px; }
.page-head .crumb a:hover { color: var(--brand); }
.page-head h1 { font-size: clamp(28px, 3.6vw, 44px); line-height: 1.3; letter-spacing: -0.6px; }
.page-head p { margin-top: 16px; max-width: 680px; color: var(--muted); font-size: 16.5px; line-height: 1.85; }

/* ---------------- 下载页 ---------------- */
.os-tabs { display: flex; gap: 8px; padding: 5px; background: #eef1f7; border-radius: 14px; width: fit-content; margin-bottom: 30px; }
.os-tab {
  border: none; background: transparent; padding: 9px 22px; border-radius: 10px;
  font-size: 14.5px; color: var(--muted); cursor: pointer; transition: 0.22s;
  display: flex; align-items: center; gap: 7px;
}
.os-tab.active { background: #fff; color: var(--ink); font-weight: 600; box-shadow: 0 1px 3px rgba(16, 24, 40, 0.1); }

.dl-panel { display: none; }
.dl-panel.active { display: block; animation: fadeIn 0.4s var(--ease); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.dl-card {
  display: grid; grid-template-columns: 1fr 320px; gap: 40px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 38px; box-shadow: var(--shadow-sm);
}
.dl-main h2 { font-size: 24px; letter-spacing: -0.3px; }
.dl-main .ver { display: flex; gap: 14px; flex-wrap: wrap; margin: 12px 0 20px; }
.dl-main .ver span {
  font-size: 12.5px; color: var(--ink-2); background: var(--bg-soft);
  padding: 4px 11px; border-radius: 999px; border: 1px solid var(--line);
}
.dl-main p { color: var(--muted); font-size: 14.8px; }
.dl-actions { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.dl-side {
  background: #fbfcfe; border: 1px solid var(--line); border-radius: 16px; padding: 22px;
}
.dl-side h3 { font-size: 14px; margin-bottom: 12px; }
.dl-side ul { display: grid; gap: 9px; }
.dl-side li { font-size: 13px; color: var(--muted); display: flex; justify-content: space-between; gap: 10px; }
.dl-side li b { color: var(--ink-2); font-weight: 500; }

.hash-box {
  margin-top: 22px; background: #fbfcfe; border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px; font-size: 11.5px;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  color: var(--muted); word-break: break-all; line-height: 1.7;
}
.hash-box b { display: block; color: var(--ink-2); font-size: 11px; margin-bottom: 4px; font-family: inherit; letter-spacing: 1px; }

.release-list { display: grid; gap: 10px; }
.release-item {
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 18px 22px; transition: border-color 0.22s, box-shadow 0.22s;
}
.release-item:hover { border-color: #cfd8ea; box-shadow: var(--shadow-sm); }
.release-item h4 { font-size: 14.5px; }
.release-item p { font-size: 12.8px; color: var(--muted); margin-top: 3px; }
.release-item .meta { font-size: 12.5px; color: var(--muted-2); white-space: nowrap; }

/* ---------------- 教程页 ---------------- */
.doc-layout { display: grid; grid-template-columns: 232px 1fr; gap: 56px; align-items: start; }
.doc-toc { position: sticky; top: 100px; }
.doc-toc h4 { font-size: 12px; letter-spacing: 1.6px; color: var(--muted-2); margin-bottom: 14px; }
.doc-toc ul { display: grid; gap: 3px; border-left: 1px solid var(--line); }
.doc-toc a {
  display: block; padding: 7px 0 7px 16px; font-size: 14px; color: var(--muted);
  border-left: 2px solid transparent; margin-left: -1px; transition: 0.2s;
}
.doc-toc a:hover { color: var(--brand); border-left-color: var(--brand); }

.doc-article h2 { font-size: 26px; letter-spacing: -0.3px; margin: 52px 0 18px; scroll-margin-top: 110px; }
.doc-article h2:first-child { margin-top: 0; }
.doc-article h3 { font-size: 18px; margin: 26px 0 10px; }
.doc-article p { color: var(--ink-2); font-size: 15.6px; line-height: 1.95; margin-bottom: 14px; }
.doc-article ul, .doc-article ol { margin: 12px 0 18px; padding-left: 4px; }
.doc-article li { color: var(--ink-2); font-size: 15.4px; margin-bottom: 9px; display: flex; gap: 10px; }
.doc-article ul li::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand);
  flex-shrink: 0; margin-top: 10px;
}
.doc-article ol { counter-reset: o; }
.doc-article ol li { counter-increment: o; }
.doc-article ol li::before {
  content: counter(o); flex-shrink: 0; width: 21px; height: 21px; border-radius: 50%;
  background: var(--brand-soft); color: var(--brand);
  font-size: 11.5px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; margin-top: 3px;
}
.callout {
  border-left: 3px solid var(--teal); background: var(--mint-soft);
  border-radius: 0 12px 12px 0; padding: 16px 20px; margin: 20px 0;
  font-size: 14.6px; color: #0b6f68;
}
.callout b { color: #08564f; }
.callout.warn { border-left-color: #f0a83c; background: var(--cream); color: #8a5c14; }
.callout.warn b { color: #6f4a10; }

.code-block {
  background: #f7f9fd; border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px; font-family: ui-monospace, Consolas, monospace;
  font-size: 13px; color: var(--ink-2); overflow-x: auto; margin: 14px 0;
  line-height: 1.8;
}

/* ---------------- 支持页 ---------------- */
.search-hero { max-width: 620px; margin: 26px auto 0; position: relative; }
.search-hero input {
  width: 100%; padding: 16px 56px 16px 22px; font-size: 15px;
  border: 1px solid var(--line-2); border-radius: 14px; background: #fff;
  box-shadow: var(--shadow-sm); outline: none; color: var(--ink);
}
.search-hero input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px rgba(76, 92, 245, 0.1); }
.search-hero .ico {
  position: absolute; right: 18px; top: 50%; transform: translateY(-50%);
  color: var(--muted-2); font-size: 17px;
}

.support-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.support-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform 0.3s var(--ease), box-shadow 0.3s, border-color 0.3s;
  display: block;
}
.support-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #d5dded; }
.support-card .ico {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; background: var(--brand-soft); margin-bottom: 16px;
}
.support-card h3 { font-size: 17px; margin-bottom: 8px; }
.support-card p { font-size: 14px; color: var(--muted); }
.support-card .link { display: inline-block; margin-top: 14px; font-size: 13.5px; color: var(--brand); font-weight: 600; }

/* ---------------- 页脚 ---------------- */
.footer { background: #fff; border-top: 1px solid var(--line); padding-top: 64px; margin-top: 0; }
.footer-top { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 44px; padding-bottom: 46px; }
.footer-about p { font-size: 14px; color: var(--muted); margin-top: 14px; max-width: 300px; line-height: 1.9; }
.footer-col h4 { font-size: 13px; letter-spacing: 1px; color: var(--muted-2); margin-bottom: 16px; font-weight: 600; }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { font-size: 14.2px; color: var(--ink-2); transition: color 0.2s; }
.footer-col a:hover { color: var(--brand); }
.footer-bottom {
  border-top: 1px solid var(--line); padding: 22px 0;
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: 12.8px; color: var(--muted-2);
}
.footer-bottom a:hover { color: var(--brand); }

/* ---------------- 返回顶部 ---------------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 150;
  width: 44px; height: 44px; border-radius: 50%;
  background: #fff; border: 1px solid var(--line);
  box-shadow: var(--shadow-sm); color: var(--ink-2);
  cursor: pointer; font-size: 15px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: 0.28s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--brand); border-color: var(--brand); }

/* ---------------- 动效 ---------------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.65s var(--ease), transform 0.65s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .float-card { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding-top: 132px; }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .span-3, .span-2, .span-4 { grid-column: span 1; }
  .feature-row { gap: 34px; }
  .plans { grid-template-columns: repeat(2, 1fr); }
  .quote-grid, .support-grid { grid-template-columns: repeat(2, 1fr); }
  .doc-layout { grid-template-columns: 1fr; gap: 30px; }
  .doc-toc { position: static; }
  .dl-card { grid-template-columns: 1fr; gap: 24px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 860px) {
  .nav-pill { gap: 12px; }
  .nav-links {
    position: absolute; top: 76px; left: 0; right: 0;
    flex-direction: column; gap: 2px; padding: 12px;
    background: #fff; border: 1px solid var(--line); border-radius: 18px;
    box-shadow: var(--shadow-md);
    max-height: 0; overflow: hidden; opacity: 0; visibility: hidden;
    transition: 0.3s var(--ease);
  }
  .nav-links.open { max-height: 420px; opacity: 1; visibility: visible; padding: 12px; }
  .nav-links a { padding: 11px 14px; font-size: 15px; }
  .nav-toggle { display: block; margin-left: auto; }
  .nav-cta .btn { display: none; }
  .nav-pill { position: relative; }
  .steps { grid-template-columns: 1fr; }
  .steps::before { display: none; }
  .feature-row { grid-template-columns: 1fr; gap: 26px; }
  .feature-row.reverse .fr-text { order: 1; }
  .feature-row.reverse .fr-visual { order: 2; }
  .float-card { display: none; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .hero { padding: 118px 0 68px; }
  .page-head { padding: 118px 0 42px; }
  .bento, .plans, .quote-grid, .support-grid { grid-template-columns: 1fr; }
  .hero-proof { flex-wrap: wrap; gap: 10px; }
  .trust-items { gap: 22px; }
  .footer-top { grid-template-columns: 1fr; }
  .gauge-row { gap: 16px; }
  .gauge { width: 96px; height: 96px; }
  .gauge-info .big { font-size: 25px; }
  .cta { padding: 44px 24px; border-radius: 22px; }
  .dl-card { padding: 26px; }
  .release-item { flex-direction: column; align-items: flex-start; gap: 8px; }
}