:root {
  --ink: #102033;
  --muted: #66758a;
  --soft: #f3f7ff;
  --paper: #ffffff;
  --line: #dbe7fb;
  --blue: #2f6fff;
  --blue-2: #0f8cff;
  --cyan: #18b6ff;
  --sky: #eaf3ff;
  --indigo: #4f63ff;
  --shadow: 0 22px 70px rgba(47, 111, 255, 0.16);
  --shadow-soft: 0 14px 42px rgba(25, 64, 120, 0.1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: #f7faff;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 44px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid rgba(219, 231, 251, 0.72);
  backdrop-filter: blur(18px);
  transition: box-shadow 180ms ease, background 180ms ease;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 12px 38px rgba(21, 56, 110, 0.09);
}

.brand,
.site-nav,
.hero-actions,
.hero-trust,
.browser-top,
.stats-grid,
.highlight-tabs,
.site-footer,
.contact-band {
  display: flex;
  align-items: center;
}

.brand { gap: 10px; min-width: 190px; font-weight: 900; }
.brand img { width: 36px; height: 36px; }
.site-nav { gap: 28px; color: #40506a; font-size: 14px; font-weight: 700; }
.site-nav a { opacity: 0.82; }
.site-nav a:hover { color: var(--blue); opacity: 1; }

.header-action,
.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  font-weight: 900;
  white-space: nowrap;
}

.header-action {
  min-width: 112px;
  padding: 0 20px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--blue-2));
  box-shadow: 0 12px 26px rgba(47, 111, 255, 0.24);
}

.section-inner { width: min(1200px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 92px 0; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 132px 0 86px;
  background: linear-gradient(180deg, #f7fbff 0%, #eef6ff 62%, #ffffff 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(47, 111, 255, 0.16), transparent 30%),
    radial-gradient(circle at 84% 20%, rgba(24, 182, 255, 0.2), transparent 32%),
    linear-gradient(rgba(47, 111, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 111, 255, 0.06) 1px, transparent 1px);
  background-size: auto, auto, 36px 36px, 36px 36px;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 54px;
  align-items: center;
}

.hero-content { padding-top: 20px; }
.eyebrow, .section-kicker {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0;
  color: #0b1b34;
  font-size: clamp(42px, 5.6vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-copy {
  margin: 24px 0 0;
  color: #4f6178;
  font-size: 19px;
  line-height: 1.9;
}

.hero-actions { flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.primary-action { min-width: 156px; padding: 0 24px; color: #fff; background: linear-gradient(135deg, var(--blue), var(--cyan)); box-shadow: 0 16px 34px rgba(47, 111, 255, 0.26); }
.secondary-action { min-width: 156px; padding: 0 24px; color: var(--blue); background: #fff; border: 1px solid #bed3ff; }
.hero-trust { flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.hero-trust span { padding: 9px 13px; color: #2f5fb3; background: rgba(255,255,255,.78); border: 1px solid #d8e6ff; border-radius: 999px; font-size: 13px; font-weight: 800; }

.hero-showcase { position: relative; min-height: 590px; }
.browser-card {
  position: absolute;
  overflow: hidden;
  border: 1px solid rgba(179, 204, 247, 0.9);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow);
}
.browser-top { gap: 7px; height: 38px; padding: 0 14px; color: #6b7b90; border-bottom: 1px solid #e8f0ff; background: #fbfdff; font-size: 12px; font-weight: 800; }
.browser-top i { width: 9px; height: 9px; border-radius: 50%; background: #93b7ff; }
.browser-top i:nth-child(2) { background: #6fd4ff; }
.browser-top i:nth-child(3) { background: #2f6fff; }
.browser-top span { margin-left: 6px; }
.admin-preview { top: 0; right: 0; width: 88%; animation: floatOne 7s ease-in-out infinite; }
.shop-preview { left: 0; bottom: 12px; width: 74%; animation: floatTwo 8s ease-in-out infinite; }
.browser-card img { width: 100%; height: auto; }
.floating-note { position: absolute; z-index: 3; padding: 13px 17px; color: #174ca8; background: rgba(255,255,255,.88); border: 1px solid #d6e6ff; border-radius: 16px; box-shadow: var(--shadow-soft); font-size: 13px; font-weight: 900; backdrop-filter: blur(10px); }
.note-pay { top: 98px; left: 4px; }
.note-auto { right: 8px; bottom: 90px; }

.intro-section { padding-top: 64px; background: #fff; }
.intro-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 56px; align-items: start; }
.section h2 { margin: 0; font-size: clamp(30px, 4vw, 46px); line-height: 1.22; letter-spacing: -0.03em; }
.intro-grid > p, .section-heading p, .sticky-heading p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.section-heading { width: min(800px, 100%); margin-bottom: 38px; }
.center-heading { margin-inline: auto; text-align: center; }
.center-heading p:last-child { margin-top: 14px; }

.screenshots-section { background: #fff; }
.screenshot-grid { display: grid; gap: 28px; }
.screenshot-card { overflow: hidden; border: 1px solid var(--line); border-radius: 28px; background: linear-gradient(180deg, #fff, #f7fbff); box-shadow: var(--shadow-soft); }
.screenshot-card-large { display: grid; grid-template-columns: 0.42fr 0.58fr; align-items: center; }
.screenshot-copy { padding: 38px; }
.screenshot-copy span { display: inline-flex; margin-bottom: 16px; padding: 8px 12px; color: var(--blue); background: #eaf3ff; border-radius: 999px; font-size: 13px; font-weight: 900; }
.screenshot-copy h3 { margin: 0 0 14px; font-size: 28px; line-height: 1.28; }
.screenshot-copy p { margin: 0; color: var(--muted); line-height: 1.85; }
.screenshot-card figure { margin: 0; padding: 18px; }
.screenshot-card figure img { border: 1px solid #dce9ff; border-radius: 18px; box-shadow: 0 16px 48px rgba(27, 80, 155, 0.12); }

.stats-section { padding: 30px 0; background: #fff; }
.stats-grid { justify-content: space-between; gap: 16px; padding: 24px; border: 1px solid var(--line); border-radius: 24px; background: linear-gradient(135deg, #f5f9ff, #ffffff); box-shadow: var(--shadow-soft); }
.stats-grid div { flex: 1; padding: 12px 20px; border-right: 1px solid var(--line); }
.stats-grid div:last-child { border-right: 0; }
.stats-grid strong { display: block; color: var(--blue); font-size: 36px; line-height: 1; }
.stats-grid span { display: block; margin-top: 8px; color: #52657d; font-weight: 800; }

.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.feature-card { position: relative; min-height: 250px; padding: 28px; overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: 0 8px 28px rgba(30, 78, 140, 0.06); transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease; }
.feature-card:hover { transform: translateY(-5px); border-color: #aecaec; box-shadow: var(--shadow); }
.feature-card::after { position: absolute; right: -32px; top: -32px; width: 120px; height: 120px; border-radius: 50%; background: rgba(47,111,255,.08); content: ""; }
.feature-icon { display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px; margin-bottom: 28px; color: #fff; border-radius: 15px; background: var(--blue); font-weight: 900; }
.feature-card h3 { margin: 0 0 12px; font-size: 22px; }
.feature-card p, .flow-list p, .architecture-item p, .highlight-copy p, .contact-band p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
.accent-cyan .feature-icon { background: var(--cyan); }
.accent-sky .feature-icon { background: #429dff; }
.accent-indigo .feature-icon { background: var(--indigo); }

.payment-section { background: #f5f9ff; }
.split-layout { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 44px; align-items: start; }
.sticky-heading { position: sticky; top: 96px; margin-bottom: 0; }
.payment-grid-new { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.payment-grid-new article { min-height: 190px; padding: 28px; border: 1px solid #d7e6ff; border-radius: 24px; background: #fff; box-shadow: var(--shadow-soft); }
.payment-grid-new b { display: block; margin-bottom: 14px; color: #12345f; font-size: 22px; }
.payment-grid-new p { margin: 0; color: var(--muted); line-height: 1.8; }

.section-muted { background: linear-gradient(180deg, #eef6ff, #ffffff); }
.flow-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; padding: 0; margin: 0; list-style: none; }
.flow-list li { min-height: 230px; padding: 28px; border: 1px solid #d7e6ff; border-radius: 24px; background: rgba(255,255,255,.82); box-shadow: var(--shadow-soft); }
.flow-list span { display: inline-flex; margin-bottom: 38px; color: var(--blue); font-size: 15px; font-weight: 900; }
.flow-list h3 { margin: 0 0 12px; font-size: 21px; }

.architecture-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.architecture-item { display: flex; gap: 18px; min-height: 210px; padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: var(--shadow-soft); }
.architecture-item > span { display: inline-flex; align-items: center; justify-content: center; width: 58px; height: 58px; flex: 0 0 auto; color: #fff; border-radius: 18px; background: linear-gradient(135deg, var(--blue), var(--cyan)); font-weight: 900; }
.architecture-item h3 { margin: 0 0 12px; font-size: 22px; }

.highlight-section { color: var(--ink); background: #fff; }
.highlight-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr) minmax(280px, 0.78fr); gap: 22px; align-items: stretch; }
.highlight-tabs { flex-direction: column; align-items: stretch; gap: 10px; }
.highlight-tab { min-height: 54px; border: 1px solid #d7e6ff; border-radius: 16px; color: #48617e; background: #fff; cursor: pointer; font-weight: 900; transition: 160ms ease; }
.highlight-tab.active, .highlight-tab:hover { color: #fff; border-color: transparent; background: linear-gradient(135deg, var(--blue), var(--cyan)); box-shadow: 0 14px 30px rgba(47,111,255,.22); }
.highlight-copy, .highlight-points { min-height: 250px; margin: 0; padding: 32px; border: 1px solid #d7e6ff; border-radius: 24px; background: linear-gradient(180deg, #f8fbff, #fff); box-shadow: var(--shadow-soft); }
.highlight-copy h3 { margin: 0 0 16px; font-size: 28px; line-height: 1.28; }
.highlight-points { list-style: none; color: #445a75; }
.highlight-points li { position: relative; padding-left: 28px; margin-bottom: 18px; line-height: 1.7; font-weight: 800; }
.highlight-points li::before { position: absolute; top: 9px; left: 0; width: 10px; height: 10px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 6px #e9f2ff; content: ""; }

.usecase-section { background: #f5f9ff; }
.usecase-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.usecase-grid div { min-height: 86px; padding: 22px; border: 1px solid #d7e6ff; border-radius: 20px; background: #fff; color: #17355f; font-weight: 900; box-shadow: 0 8px 24px rgba(30, 78, 140, 0.05); }

.contact-section { padding-top: 0; background: #f5f9ff; }
.contact-band { align-items: stretch; justify-content: space-between; gap: 36px; padding: 44px; border-radius: 30px; color: #fff; background: linear-gradient(135deg, #1e63ff, #18b6ff); box-shadow: var(--shadow); }
.contact-band .section-kicker { color: rgba(255,255,255,.78); }
.contact-band h2 { margin-bottom: 14px; color: #fff; }
.contact-band p { color: rgba(255,255,255,.82); }
.contact-band > div:first-child { flex: 1 1 420px; }
.contact-cards { display: grid; grid-template-columns: repeat(2, minmax(190px, 1fr)); gap: 12px; flex: 1 1 520px; }
.contact-card { display: flex; flex-direction: column; justify-content: center; min-height: 98px; padding: 18px; border: 1px solid rgba(255,255,255,.32); border-radius: 20px; background: rgba(255,255,255,.16); backdrop-filter: blur(8px); }
.contact-card span { margin-bottom: 10px; color: rgba(255,255,255,.72); font-size: 13px; font-weight: 900; }
.contact-card strong { color: #fff; font-size: 16px; line-height: 1.35; word-break: break-word; }
.contact-card-disabled { cursor: not-allowed; opacity: 0.78; }
.contact-card-disabled strong { color: rgba(255,255,255,.86); }

.site-footer { justify-content: space-between; gap: 24px; padding: 28px 44px; color: var(--muted); border-top: 1px solid var(--line); background: #fff; font-size: 14px; }

@keyframes floatOne { 0%, 100% { transform: translate3d(0, 0, 0) rotate(0.2deg); } 50% { transform: translate3d(0, -12px, 0) rotate(-0.2deg); } }
@keyframes floatTwo { 0%, 100% { transform: translate3d(0, 0, 0) rotate(-0.4deg); } 50% { transform: translate3d(0, 14px, 0) rotate(0.2deg); } }

@media (max-width: 1060px) {
  .site-header { padding: 0 24px; }
  .site-nav { gap: 16px; }
  .hero-grid, .intro-grid, .split-layout, .screenshot-card-large, .highlight-layout { grid-template-columns: 1fr; }
  .hero-showcase { min-height: 520px; }
  .admin-preview { width: 86%; }
  .shop-preview { width: 76%; }
  .feature-grid, .architecture-grid, .usecase-grid, .payment-grid-new { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .highlight-tabs { flex-direction: row; flex-wrap: wrap; }
  .highlight-tab { flex: 1 1 160px; }
  .sticky-heading { position: static; }
}

@media (max-width: 760px) {
  .site-header { min-height: 64px; padding: 0 16px; }
  .site-nav { display: none; }
  .brand { min-width: 0; }
  .brand span { max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .header-action { min-width: 92px; min-height: 38px; padding: 0 14px; font-size: 13px; }
  .section-inner { width: min(100% - 28px, 1200px); }
  .section { padding: 64px 0; }
  .hero { padding: 96px 0 58px; }
  .hero-grid { gap: 28px; }
  .hero-copy { font-size: 16px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .primary-action, .secondary-action { width: 100%; }
  .hero-showcase { min-height: 360px; }
  .browser-top { height: 30px; }
  .admin-preview { width: 94%; right: -18px; }
  .shop-preview { width: 84%; left: -8px; bottom: 0; }
  .floating-note { display: none; }
  .feature-grid, .architecture-grid, .usecase-grid, .payment-grid-new, .flow-list { grid-template-columns: 1fr; }
  .stats-grid { flex-direction: column; align-items: stretch; }
  .stats-grid div { border-right: 0; border-bottom: 1px solid var(--line); }
  .stats-grid div:last-child { border-bottom: 0; }
  .screenshot-copy, .highlight-copy, .highlight-points, .contact-band { padding: 24px; }
  .screenshot-copy h3, .highlight-copy h3 { font-size: 23px; }
  .contact-band, .site-footer { flex-direction: column; }
  .contact-cards { grid-template-columns: 1fr; }
}