:root {
  color-scheme: light;
  --ink: #171b35;
  --muted: #697086;
  --line: #e6e9f2;
  --surface: #ffffff;
  --soft: #f4f6ff;
  --blue: #4c46f5;
  --violet: #7f2cff;
  --teal: #13b99f;
  --pink: #ec5f8e;
  --orange: #f28a35;
  --shadow: 0 22px 70px rgba(45, 52, 95, 0.16);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  color: var(--ink);
  background: #f1f4fb;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px clamp(20px, 4vw, 58px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(230, 233, 242, 0.8);
  backdrop-filter: blur(18px);
}
.brand, .nav, .hero-actions, .site-footer { display: flex; align-items: center; }
.brand { gap: 10px; font-weight: 900; font-size: 18px; }
.brand-logo {
  display: block;
  width: 118px;
  height: 42px;
  object-fit: contain;
}
.nav { gap: 28px; color: #3f455d; font-size: 14px; }
.nav a { padding: 8px 0; }
.header-cta, .primary-action, .secondary-action, .product-card button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 8px;
  font-weight: 800;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background 160ms ease;
}
.header-cta, .primary-action {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 14px 30px rgba(76, 70, 245, 0.26);
}
.header-cta { padding: 0 18px; font-size: 14px; }
.primary-action { padding: 0 24px; }
.secondary-action {
  padding: 0 22px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.9);
}
.header-cta:hover, .primary-action:hover, .secondary-action:hover, .product-card button:hover { transform: translateY(-2px); }
.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.menu-button span { display: block; width: 18px; height: 2px; margin: 5px auto; background: var(--ink); }
.hero {
  position: relative;
  min-height: 88vh;
  padding: 150px clamp(20px, 6vw, 82px) 72px;
  overflow: hidden;
  background: linear-gradient(90deg, rgba(26, 22, 78, 0.94), rgba(48, 37, 154, 0.72) 48%, rgba(94, 47, 211, 0.2)), #1b1754;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 28%;
  background: linear-gradient(180deg, rgba(241, 244, 251, 0), #f1f4fb);
}
.hero-media { position: absolute; inset: 0; opacity: 0.94; }
.shot { position: absolute; object-fit: cover; border: 1px solid rgba(255,255,255,0.44); box-shadow: var(--shadow); }
.shot-main { right: clamp(245px, 26vw, 380px); bottom: 42px; width: min(28vw, 330px); min-width: 230px; border-radius: 28px; transform: rotate(-4deg); }
.shot-side { right: clamp(16px, 5vw, 96px); top: 108px; width: min(24vw, 292px); min-width: 210px; border-radius: 28px; transform: rotate(5deg); }
.shot-form { right: clamp(18px, 5vw, 80px); top: 250px; width: min(22vw, 270px); min-width: 210px; border-radius: 28px; transform: rotate(1deg); }
.hero-content { position: relative; z-index: 1; width: min(720px, 100%); color: #fff; }
.eyebrow { margin: 0 0 14px; color: var(--teal); font-weight: 900; font-size: 13px; text-transform: uppercase; }
.hero .eyebrow { color: #b7fff4; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 22px; font-size: clamp(48px, 6.2vw, 82px); line-height: 0.98; letter-spacing: 0; }
h2 { margin-bottom: 0; font-size: clamp(30px, 4vw, 54px); line-height: 1.08; letter-spacing: 0; }
h3 { margin-bottom: 10px; font-size: 22px; line-height: 1.24; }
.hero-copy { width: min(640px, 100%); color: rgba(255,255,255,0.86); font-size: 20px; line-height: 1.75; }
.hero-actions { flex-wrap: wrap; gap: 14px; margin: 34px 0 28px; }
.hero-note { display: inline-flex; padding: 12px 16px; color: rgba(255,255,255,0.78); background: rgba(255,255,255,0.11); border: 1px solid rgba(255,255,255,0.16); border-radius: 8px; backdrop-filter: blur(16px); }
.section { padding: 92px clamp(20px, 6vw, 82px); }
.section-heading { width: min(880px, 100%); margin-bottom: 42px; }
.section-heading h2 { color: #172033; }
.section-heading p, .product-card p, .flow-step p, .why-grid p, .process-card p { color: var(--muted); line-height: 1.72; }
.process-card {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 28px;
  align-items: center;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.value-icon { display: grid; place-items: center; width: 32px; height: 32px; margin-bottom: 16px; color: #ff6d3a; background: #fff0e8; border-radius: 9px; font-weight: 900; }
.mini-flow { display: grid; grid-template-columns: 1fr 28px 1fr 28px 1fr; gap: 8px; align-items: center; }
.mini-flow div { display: grid; place-items: center; min-height: 132px; padding: 18px; text-align: center; background: #f6f7fe; border-radius: 14px; }
.mini-flow span { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 10px; color: var(--blue); background: #e9e7ff; border-radius: 50%; font-size: 22px; }
.mini-flow i { height: 2px; background: #cdd3e4; position: relative; }
.mini-flow i::after { content: ""; position: absolute; right: 0; top: -4px; border-left: 7px solid #cdd3e4; border-top: 5px solid transparent; border-bottom: 5px solid transparent; }
.products-section { background: #edf1fb; }
.product-layout { display: grid; grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr); gap: 22px; align-items: stretch; }
.product-card { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 158px; padding: 24px; cursor: pointer; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.product-card + .product-card { margin-top: 14px; }
.product-card.active { border-color: rgba(76, 70, 245, 0.5); box-shadow: 0 18px 50px rgba(76, 70, 245, 0.13); }
.tag { margin-bottom: 8px; color: var(--orange); font-weight: 900; font-size: 13px; }
.product-card button { width: 58px; min-width: 58px; color: var(--blue); background: #eff0ff; border: 1px solid #d8dbff; cursor: pointer; }
.product-preview { grid-row: span 3; margin: 0; padding: 18px; background: #101827; border-radius: 8px; box-shadow: var(--shadow); }
.product-preview img { width: 100%; height: 590px; object-fit: contain; background: #e9eef5; border-radius: 6px; }
.product-preview figcaption { padding: 16px 4px 2px; color: rgba(255,255,255,0.78); line-height: 1.55; }
.flow-section { background: #f8fafc; }
.flow-rail { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.flow-step { min-height: 250px; padding: 28px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.flow-step span { display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: 48px; color: #fff; background: var(--ink); border-radius: 50%; font-weight: 900; }
.why-section { background: #f1f4fb; }
.why-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.why-grid article { min-height: 210px; padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 12px 36px rgba(45, 52, 95, 0.08); }
.why-icon { display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: 22px; border-radius: 12px; font-size: 22px; font-weight: 900; }
.purple { color: #6b4df6; background: #eeeaff; }
.pink { color: var(--pink); background: #ffeaf2; }
.green { color: var(--teal); background: #e5faf5; }
.orange { color: var(--orange); background: #fff0e2; }
.start-section { padding: 58px clamp(20px, 6vw, 82px) 72px; text-align: center; background: #f1f4fb; }
.agreement-line { display: flex; align-items: flex-start; justify-content: center; gap: 8px; max-width: 760px; margin: 0 auto 20px; color: #7b8295; font-size: 14px; line-height: 1.7; }
.agreement-line span { display: grid; place-items: center; width: 18px; height: 18px; flex: 0 0 auto; margin-top: 2px; color: #fff; background: var(--blue); border-radius: 4px; font-size: 12px; }
.agreement-line p { margin-bottom: 0; }
.big-action { width: min(390px, 100%); min-height: 58px; font-size: 18px; }
.secure-note { margin: 18px 0 0; color: #9aa1b4; font-size: 13px; }
.site-footer { justify-content: space-between; gap: 20px; padding: 28px clamp(20px, 6vw, 82px); color: #687386; background: #fff; border-top: 1px solid var(--line); }
.site-footer a { color: #687386; }
@media (max-width: 980px) {
  .nav, .header-cta { display: none; }
  .menu-button { display: block; }
  .site-header.open .nav { position: absolute; top: 72px; right: 20px; left: 20px; display: grid; gap: 4px; padding: 16px; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); }
  .hero { padding-top: 126px; }
  .shot-form { display: none; }
  .shot-main { right: -20px; bottom: 18px; opacity: 0.52; }
  .shot-side { right: 116px; top: auto; bottom: 80px; opacity: 0.48; }
  .process-card, .product-layout, .flow-rail, .why-grid { grid-template-columns: 1fr; }
  .product-preview { grid-row: auto; }
  .product-preview img { height: min(76vh, 620px); }
}
@media (max-width: 640px) {
  .site-header { min-height: 64px; padding: 11px 16px; }
  .site-header.open .nav { top: 64px; right: 16px; left: 16px; }
  .hero { min-height: 92vh; padding: 108px 18px 48px; }
  h1 { font-size: 44px; }
  .hero-copy { font-size: 17px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .primary-action, .secondary-action { width: 100%; }
  .shot-main { width: 210px; min-width: 210px; opacity: 0.32; }
  .shot-side { display: none; }
  .section { padding: 70px 18px; }
  .process-card { padding: 24px; border-radius: 16px; }
  .mini-flow { grid-template-columns: 1fr; }
  .mini-flow i { width: 2px; height: 24px; margin: 0 auto; }
  .mini-flow i::after { right: -4px; top: auto; bottom: 0; border-left: 5px solid transparent; border-right: 5px solid transparent; border-top: 7px solid #cdd3e4; border-bottom: 0; }
  .product-card { align-items: flex-start; flex-direction: column; }
  .product-preview { padding: 10px; }
  .product-preview img { height: 520px; }
  .site-footer { align-items: flex-start; flex-direction: column; }
}