:root {
  --brand: #ff5a3c;
  --brand-2: #ff8a3d;
  --ink: #1c1a1e;
  --sub: #6b6770;
  --bg: #fff8f4;
  --card: #ffffff;
  --line: #f0e4dc;
  --grad: linear-gradient(120deg, #ff5a3c 0%, #ff8a3d 100%);
  --radius: 18px;
  --shadow: 0 18px 40px rgba(255, 90, 60, 0.10);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }

/* 导航 */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 250, 246, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1120px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 32px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 38px; height: 38px; border-radius: 11px;
  background: var(--grad); color: #fff;
  font-size: 20px; font-weight: 700;
  display: grid; place-items: center;
  box-shadow: 0 6px 16px rgba(255, 90, 60, 0.35);
}
.logo-text { font-size: 19px; font-weight: 700; letter-spacing: 1px; }
.logo-text em { font-style: normal; font-size: 11px; color: var(--sub); margin-left: 6px; font-weight: 500; }
.nav-links { display: flex; gap: 24px; margin-left: auto; color: var(--sub); font-size: 15px; }
.nav-links a:hover { color: var(--brand); }

.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px;
  background: var(--grad); color: #fff; font-weight: 600; font-size: 15px;
  box-shadow: 0 8px 22px rgba(255, 90, 60, 0.32);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  border: none; cursor: pointer;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(255, 90, 60, 0.42); }
.btn-ghost { background: #fff; color: var(--brand); border: 1.5px solid #ffd9cd; box-shadow: none; }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 15px 34px; font-size: 16px; }

/* Hero */
.hero { overflow: hidden; }
.hero-inner {
  max-width: 1120px; margin: 0 auto; padding: 76px 24px 88px;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center;
}
.badge {
  display: inline-block; padding: 7px 16px; border-radius: 999px;
  background: #ffe9e2; color: var(--brand); font-size: 13px; font-weight: 600;
  margin-bottom: 20px;
}
h1 { font-size: 52px; line-height: 1.18; letter-spacing: 1px; }
.grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { margin: 22px 0 30px; color: var(--sub); font-size: 17px; max-width: 460px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-points {
  list-style: none; margin-top: 34px; display: flex; flex-wrap: wrap; gap: 10px 22px;
  color: var(--sub); font-size: 14px;
}
.hero-points li::before { content: "✓ "; color: var(--brand); font-weight: 700; }

/* Hero 手机 mockup */
.hero-art { position: relative; display: flex; justify-content: center; }
.phone {
  width: 280px; height: 560px; border-radius: 40px;
  background: #211d24; padding: 12px;
  box-shadow: 0 40px 80px rgba(80, 30, 10, 0.28);
  transform: rotate(3deg);
}
.phone-notch {
  width: 90px; height: 22px; background: #211d24; border-radius: 0 0 14px 14px;
  position: absolute; left: 50%; transform: translateX(-50%); top: 12px; z-index: 2;
}
.phone-screen {
  height: 100%; border-radius: 30px; background: #fff7f1; overflow: hidden;
  padding: 46px 16px 16px; display: flex; flex-direction: column; gap: 14px;
}
.screen-bar {
  height: 54px; border-radius: 14px; background: var(--grad);
  margin-bottom: 4px;
}
.screen-card {
  background: #fff; border-radius: 14px; padding: 12px;
  box-shadow: 0 8px 20px rgba(60, 20, 5, 0.08);
  display: flex; flex-direction: column; gap: 8px;
}
.screen-thumb {
  height: 88px; border-radius: 10px;
  background: linear-gradient(135deg, #ffd8c8, #ff9d6b);
}
.screen-thumb.warm { background: linear-gradient(135deg, #ffe3c8, #ffb05e); }
.screen-line { height: 10px; border-radius: 6px; background: #efe8e2; }
.w70 { width: 70%; } .w60 { width: 60%; } .w50 { width: 50%; }
.w40 { width: 40%; } .w85 { width: 85%; } .w45 { width: 45%; }
.screen-play {
  background: #fff; border-radius: 14px; padding: 16px;
  display: flex; align-items: center; gap: 12px;
  box-shadow: 0 8px 20px rgba(60, 20, 5, 0.08);
}
.play-dot {
  width: 40px; height: 40px; border-radius: 50%; background: var(--grad);
  position: relative;
}
.play-dot::after {
  content: ""; position: absolute; inset: 0; margin: auto;
  width: 0; height: 0;
  border-left: 11px solid #fff; border-top: 7px solid transparent; border-bottom: 7px solid transparent;
  transform: translateX(1px);
}
.chip {
  position: absolute; background: #fff; border-radius: 12px; padding: 9px 14px;
  font-size: 13px; font-weight: 600; box-shadow: 0 12px 28px rgba(60, 20, 5, 0.14);
}
.chip-a { top: 90px; left: -6px; color: #16a34a; }
.chip-b { bottom: 70px; right: -8px; color: var(--brand); }

/* 数据条 */
.strip { background: var(--ink); color: #fff; padding: 26px 0; }
.strip-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-around; flex-wrap: wrap; gap: 18px;
}
.strip-num { font-size: 20px; font-weight: 700; letter-spacing: 1px; }

/* 通用 section */
.features, .flow, .platforms {
  max-width: 1120px; margin: 0 auto; padding: 88px 24px 20px;
}
h2 { font-size: 34px; text-align: center; }
.sub { text-align: center; color: var(--sub); margin: 14px 0 46px; font-size: 16px; }
.grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; box-shadow: var(--shadow);
  transition: transform 0.2s ease;
}
.card:hover { transform: translateY(-5px); }
.icon {
  width: 48px; height: 48px; border-radius: 14px; background: #ffe9e2;
  color: var(--brand); display: grid; place-items: center; font-size: 22px; font-weight: 700;
  margin-bottom: 18px;
}
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--sub); font-size: 14px; }

/* 流程 */
.steps {
  display: flex; align-items: center; justify-content: center; gap: 18px; flex-wrap: wrap;
}
.step {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; width: 250px; text-align: center; box-shadow: var(--shadow);
}
.step-num {
  width: 42px; height: 42px; border-radius: 50%; background: var(--grad); color: #fff;
  display: grid; place-items: center; font-size: 18px; font-weight: 700; margin: 0 auto 16px;
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--sub); font-size: 14px; }
.step-arrow { font-size: 26px; color: #f4b79f; font-weight: 700; }

/* 平台 */
.plat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.plat {
  border-radius: var(--radius); padding: 32px 26px; color: #fff; position: relative;
  overflow: hidden; min-height: 210px;
}
.plat.douyin { background: linear-gradient(150deg, #181820, #2a2a34); }
.plat.kuaishou { background: linear-gradient(150deg, #ff6a00, #ff9a3c); }
.plat.shipinhao { background: linear-gradient(150deg, #06ae56, #16c873); }
.plat-logo {
  width: 52px; height: 52px; border-radius: 15px; background: rgba(255,255,255,0.18);
  display: grid; place-items: center; font-size: 24px; font-weight: 700; margin-bottom: 18px;
}
.plat h3 { font-size: 20px; margin-bottom: 10px; }
.plat p { font-size: 14px; opacity: 0.9; margin-bottom: 18px; }
.plat-tag {
  display: inline-block; font-size: 12px; padding: 4px 12px; border-radius: 999px;
  background: rgba(255,255,255,0.2);
}

/* 下载 */
.download { padding: 88px 24px 96px; }
.download-inner {
  max-width: 920px; margin: 0 auto; text-align: center;
  background: var(--grad); border-radius: 28px; color: #fff; padding: 64px 32px;
  box-shadow: 0 30px 60px rgba(255, 90, 60, 0.32);
}
.download h2 { font-size: 32px; }
.download p { margin: 12px 0 30px; opacity: 0.92; }
.store-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.download .btn { background: #fff; color: var(--brand); box-shadow: 0 10px 24px rgba(0,0,0,0.18); }
.download .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.65); }

.footer { background: var(--ink); color: #9b96a0; font-size: 13px; }
.footer-inner {
  max-width: 1120px; margin: 0 auto; padding: 22px 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; padding-top: 48px; }
  h1 { font-size: 38px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .plat-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .phone { transform: none; }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  h1 { font-size: 32px; }
}