:root {
  --ink: #10203d; --muted: #5d6b82; --blue: #145cf5; --blue-dark: #0b3ca8;
  --cyan: #17c5ee; --paper: #f4f7fc; --line: #dbe4f2;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: white; font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif; font-size: 16px; line-height: 1.65; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
.site-header { position: sticky; top: 0; z-index: 30; height: 76px; padding: 0 max(24px, calc((100vw - 1180px) / 2)); display: flex; align-items: center; gap: 36px; background: rgb(255 255 255 / 92%); border-bottom: 1px solid rgb(219 228 242 / 80%); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand img { border-radius: 11px; }
.brand span { display: flex; flex-direction: column; line-height: 1.25; }
.brand b { font-size: 18px; letter-spacing: .02em; }
.brand small { color: var(--muted); font-size: 12px; }
nav { display: flex; gap: 28px; margin-left: auto; color: #41506a; font-size: 15px; }
nav a:hover { color: var(--blue); }
.header-download { display: inline-flex; align-items: center; gap: 7px; padding: 9px 16px; color: white; background: var(--blue); border-radius: 10px; font-weight: 700; }
.hero { min-height: 670px; padding: 84px max(24px, calc((100vw - 1180px) / 2)) 74px; display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 54px; overflow: hidden; background: radial-gradient(circle at 74% 15%, #d9f6ff 0, transparent 30%), linear-gradient(145deg, #f7faff 0%, #edf4ff 57%, #f7fbff 100%); }
.eyebrow { display: inline-flex; align-items: center; gap: 7px; padding: 7px 12px; border: 1px solid #bcd0fa; border-radius: 99px; color: var(--blue-dark); background: rgb(255 255 255 / 70%); font-size: 14px; font-weight: 700; }
h1 { margin: 23px 0 18px; font-size: clamp(40px, 5vw, 70px); line-height: 1.08; letter-spacing: -.045em; word-break: keep-all; overflow-wrap: normal; }
h1 em { display: inline-block; color: var(--blue); font-style: normal; white-space: nowrap; }
.hero-lead { max-width: 580px; margin: 0; color: #4f5f78; font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; align-items: center; gap: 12px; margin: 29px 0 20px; }
.primary-button, .secondary-button { min-height: 50px; padding: 0 22px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border-radius: 12px; font-weight: 800; }
.primary-button { color: white; background: linear-gradient(135deg, var(--blue), #2d73ff); box-shadow: 0 12px 28px rgb(20 92 245 / 25%); }
.primary-button:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgb(20 92 245 / 32%); }
.secondary-button { border: 1px solid #cbd8ed; background: white; }
.download-note { display: flex; flex-wrap: wrap; gap: 10px 20px; color: #52617a; font-size: 13px; }
.download-status { min-height: 24px; margin: -8px 0 10px; color: var(--blue-dark); font-size: 13px; font-weight: 700; }
.download-trigger.downloading { opacity: .65; pointer-events: none; }
.download-note span { display: inline-flex; align-items: center; gap: 4px; }
.download-note svg { color: #18a265; }
.hero-visual { position: relative; }
.hero-visual > img { display: block; border-radius: 28px; box-shadow: 0 30px 70px rgb(38 69 126 / 22%); transform: rotate(1deg); }
.version-tag { position: absolute; z-index: 2; right: -15px; top: -20px; width: 78px; height: 78px; display: grid; place-items: center; border: 7px solid white; border-radius: 50%; color: white; background: var(--blue); font-weight: 900; box-shadow: 0 10px 30px rgb(20 92 245 / 30%); }
.float-card { position: absolute; left: -26px; bottom: -30px; display: flex; align-items: center; gap: 10px; padding: 13px 18px; border: 1px solid white; border-radius: 15px; background: rgb(255 255 255 / 94%); box-shadow: 0 17px 35px rgb(28 50 92 / 20%); }
.float-card svg { color: var(--blue); }
.float-card span { display: flex; flex-direction: column; }
.float-card small { color: var(--muted); }
.trust-strip { min-height: 82px; padding: 18px max(24px, calc((100vw - 1180px) / 2)); display: flex; align-items: center; justify-content: center; gap: 42px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: #475873; }
.trust-strip > span { color: #8a96a9; font-size: 13px; text-transform: uppercase; letter-spacing: .15em; }
.trust-strip b { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.trust-strip svg { color: var(--blue); }
.section { max-width: 1180px; margin: auto; padding: 105px 24px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 45px; }
.section-heading > span, .section-kicker { color: var(--blue); font-size: 14px; font-weight: 800; letter-spacing: .12em; }
.section-heading h2, .showcase h2, .contact h2, .requirements h2 { margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.25; letter-spacing: -.04em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { position: relative; min-height: 250px; padding: 32px; border: 1px solid var(--line); border-radius: 20px; background: linear-gradient(145deg, white, #f8fbff); overflow: hidden; }
.feature-card:hover { border-color: #9dbaf3; transform: translateY(-4px); box-shadow: 0 20px 46px rgb(38 76 140 / 10%); }
.feature-card svg { margin-top: 36px; color: var(--blue); }
.feature-symbol { margin-top: 34px; color: var(--blue); font: 800 30px/1 Arial, sans-serif; }
.feature-card h3 { margin: 14px 0 7px; font-size: 21px; }
.feature-card p { margin: 0; color: var(--muted); }
.feature-index { position: absolute; right: 24px; top: 17px; color: #d8e4fb; font: 800 40px/1 Arial; }
.showcase { display: grid; grid-template-columns: .85fr 1.15fr; align-items: center; gap: 72px; }
.showcase-copy h2 { margin-top: 14px; }
.showcase ul { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; color: #4b5b74; }
.showcase li { display: flex; align-items: flex-start; gap: 9px; }
.showcase li svg { width: 19px; flex: 0 0 19px; margin-top: 4px; color: #18a265; }
.feature-poster { border-radius: 24px; box-shadow: 0 26px 64px rgb(42 75 132 / 15%); }
.compact { display: block; text-align: center; }
.compact h2 { margin-top: 8px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.steps article { padding: 30px; border-top: 3px solid var(--blue); background: var(--paper); }
.steps article > b { color: var(--blue); font: 800 26px/1 Arial; }
.steps h3 { margin: 28px 0 7px; font-size: 21px; }
.steps p { margin: 0; color: var(--muted); }
.interface-section { padding-top: 68px; }
.interface-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 20px; align-items: stretch; }
.interface-grid figure { margin: 0; padding: 16px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 20px; background: white; box-shadow: 0 18px 44px rgb(38 76 140 / 9%); }
.interface-grid .interface-main { grid-column: 1 / -1; }
.interface-grid img { width: 100%; flex: 1; object-fit: contain; border: 1px solid #e8edf5; border-radius: 12px; background: #f7f9fc; }
.interface-grid figcaption { padding: 17px 5px 4px; display: flex; flex-direction: column; gap: 5px; }
.interface-grid figcaption b { font-size: 19px; }
.interface-grid figcaption span { color: var(--muted); line-height: 1.65; }
.workflow-list { margin-top: 20px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.workflow-list div { padding: 20px; display: flex; flex-direction: column; gap: 7px; border-radius: 15px; background: #edf4ff; }
.workflow-list b { color: var(--blue-dark); font-size: 17px; }
.workflow-list span { color: #53647d; line-height: 1.65; }
.security-note { margin-top: 22px; padding: 22px 26px; border: 1px solid #f0cf83; border-radius: 16px; color: #634718; background: #fff9e9; }
.security-note b { font-size: 18px; }
.security-note p { margin: 9px 0 0; line-height: 1.75; }
.requirements { margin: 30px auto; padding: 76px max(24px, calc((100vw - 1180px) / 2)); display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; color: white; background: #0d2043; }
.section-kicker.light { color: #6fdfff; }
.requirements h2 { margin-top: 12px; }
.requirements p { color: #b8c5d9; }
.requirements dl { margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.requirements dl div { padding: 20px; border: 1px solid rgb(255 255 255 / 14%); border-radius: 14px; background: rgb(255 255 255 / 5%); }
.requirements dt { color: #91a4c3; font-size: 13px; }
.requirements dd { margin: 4px 0 0; font-weight: 700; }
.contact { display: grid; grid-template-columns: 1fr 340px; align-items: center; gap: 80px; }
.contact h2 { max-width: 750px; margin-top: 10px; }
.contact-copy > p { color: var(--muted); }
.price-row { display: flex; gap: 14px; margin-top: 30px; }
.price-row > div { min-width: 190px; padding: 20px; border: 1px solid var(--line); border-radius: 16px; }
.price-row small, .price-row span { display: block; color: var(--muted); font-size: 13px; }
.price-row b { color: var(--blue); font-size: 30px; }
.qr-card { padding: 18px 18px 24px; display: flex; flex-direction: column; align-items: center; border: 1px solid var(--line); border-radius: 22px; background: white; box-shadow: 0 20px 50px rgb(38 76 140 / 12%); }
.qr-card img { border-radius: 13px; }
.qr-card b { margin-top: 12px; }
.qr-card span { color: var(--muted); font-size: 13px; }
.final-cta { max-width: 1180px; margin: 30px auto 100px; padding: 38px 45px; display: flex; align-items: center; gap: 22px; color: white; border-radius: 24px; background: linear-gradient(125deg, #0d45bd, #1469ff 70%, #09bce9); box-shadow: 0 24px 55px rgb(20 92 245 / 25%); }
.final-cta h2 { margin: 0; font-size: 30px; }
.cta-icon { font-size: 42px; font-weight: 800; line-height: 1; }
.final-cta p { margin: 0; color: #dce9ff; }
.light-button { margin-left: auto; color: var(--blue); background: white; box-shadow: none; white-space: nowrap; }
footer { min-height: 110px; padding: 26px max(24px, calc((100vw - 1180px) / 2)); display: flex; align-items: center; gap: 30px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer p { margin-left: auto; }
footer > a { color: var(--blue); }
.primary-button, .secondary-button, .feature-card { transition: .2s ease; }
a:focus-visible { outline: 3px solid #77a3ff; outline-offset: 3px; }
@media (max-width: 1050px) {
  nav { display: none; } .site-header { gap: 12px; } .header-download { margin-left: auto; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 56px; } .hero-copy { text-align: center; }
  .hero-lead { margin-inline: auto; } .hero-actions, .download-note { justify-content: center; }
  .hero-visual { max-width: 680px; margin: 15px auto 0; } .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase, .contact, .requirements { grid-template-columns: 1fr; gap: 42px; } .qr-card { max-width: 340px; margin: auto; }
  .interface-grid { grid-template-columns: 1fr; } .workflow-list { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .site-header { height: 68px; padding-inline: 16px; } .brand small { display: none; }
  .header-download { padding: 8px 12px; font-size: 14px; } .hero { padding: 48px 18px 60px; gap: 38px; }
  h1 { font-size: clamp(34px, 10vw, 45px); letter-spacing: -.035em; } .hero-lead { font-size: 16px; } .hero-actions { flex-direction: column; }
  .hero-actions a { width: 100%; } .version-tag { right: -5px; width: 62px; height: 62px; }
  .float-card { left: 8px; bottom: -28px; } .trust-strip { justify-content: flex-start; gap: 18px; overflow-x: auto; white-space: nowrap; }
  .section { padding: 78px 18px; } .section-heading { display: block; } .section-heading h2 { margin-top: 10px; }
  .feature-grid, .steps { grid-template-columns: 1fr; } .showcase { padding-top: 10px; }
  .requirements { padding: 60px 20px; } .requirements dl { grid-template-columns: 1fr; }
  .price-row { flex-direction: column; } .final-cta { margin: 20px 18px 70px; padding: 32px 24px; flex-direction: column; align-items: flex-start; }
  .light-button { width: 100%; margin: 8px 0 0; } footer { padding: 28px 18px; flex-direction: column; align-items: flex-start; gap: 12px; }
  footer p { margin: 0; }
}