:root {
  --c-navy: #0b2545;
  --c-blue: #13558c;
  --c-sky: #1d7fb8;
  --c-cyan: #2bb6c4;
  --c-accent: #ff7a18;
  --c-accent2: #ffb347;
  --c-ink: #1a2233;
  --c-gray: #5b6677;
  --c-line: #e3e9f0;
  --c-bg: #f5f8fc;
  --c-white: #ffffff;
  --shadow: 0 10px 30px rgba(11, 37, 69, 0.08);
  --radius: 16px;
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img, svg { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--c-line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--c-navy); }
.brand .logo { width: 34px; height: 34px; }
.brand span { color: var(--c-sky); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--c-gray); font-weight: 600; font-size: 15px; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--c-blue); }
.nav-cta {
  background: var(--c-accent); color: #fff; padding: 9px 18px; border-radius: 999px;
  font-weight: 700; font-size: 14px; transition: transform .2s, box-shadow .2s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(255,122,24,.35); }
.nav-toggle { display: none; background: none; border: none; font-size: 26px; color: var(--c-navy); cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(43,182,196,.25), transparent 60%),
    linear-gradient(135deg, #0b2545 0%, #13558c 55%, #1d7fb8 100%);
  color: #fff;
}
.hero .container { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; padding: 84px 20px 96px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25); padding: 6px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 600; margin-bottom: 22px;
}
.hero h1 { font-size: 44px; line-height: 1.25; font-weight: 800; letter-spacing: -.5px; }
.hero h1 em { font-style: normal; color: var(--c-accent2); }
.hero p.lead { font-size: 18px; color: rgba(255,255,255,.86); margin: 20px 0 32px; max-width: 540px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px; border-radius: 999px;
  font-weight: 700; font-size: 15px; transition: transform .2s, box-shadow .2s; cursor: pointer;
}
.btn-primary { background: var(--c-accent); color: #fff; box-shadow: 0 10px 24px rgba(255,122,24,.4); }
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.35); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }
.hero-stats { display: flex; gap: 30px; margin-top: 40px; }
.hero-stats .num { font-size: 30px; font-weight: 800; color: var(--c-accent2); }
.hero-stats .lbl { font-size: 13px; color: rgba(255,255,255,.75); }
.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; filter: drop-shadow(0 20px 40px rgba(0,0,0,.25)); }

/* ---------- Sections ---------- */
section { padding: 84px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 50px; }
.section-head .eyebrow { color: var(--c-sky); font-weight: 700; letter-spacing: 2px; font-size: 13px; text-transform: uppercase; }
.section-head h2 { font-size: 34px; font-weight: 800; color: var(--c-navy); margin: 12px 0 14px; }
.section-head p { color: var(--c-gray); font-size: 16px; }

.bg-white { background: var(--c-white); }
.bg-soft { background: var(--c-bg); }

/* feature cards */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); transition: transform .2s, border-color .2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--c-cyan); }
.card .ic {
  width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--c-sky), var(--c-cyan)); color: #fff; margin-bottom: 16px;
}
.card h3 { font-size: 19px; color: var(--c-navy); margin-bottom: 8px; }
.card p { color: var(--c-gray); font-size: 14.5px; }
.card ul { list-style: none; margin-top: 12px; }
.card li { position: relative; padding-left: 20px; font-size: 14px; color: var(--c-gray); margin: 6px 0; }
.card li::before { content: ""; position: absolute; left: 0; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--c-cyan); }

/* steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.step { text-align: center; position: relative; }
.step .n {
  width: 46px; height: 46px; border-radius: 50%; margin: 0 auto 14px; display: flex; align-items: center; justify-content: center;
  background: var(--c-navy); color: #fff; font-weight: 800; font-size: 18px;
}
.step h4 { color: var(--c-navy); font-size: 16px; margin-bottom: 6px; }
.step p { color: var(--c-gray); font-size: 13.5px; }

/* advantages */
.adv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.adv .item { display: flex; gap: 14px; align-items: flex-start; }
.adv .tick { flex: none; width: 30px; height: 30px; border-radius: 8px; background: rgba(43,182,196,.15); color: var(--c-sky); display: flex; align-items: center; justify-content: center; font-weight: 800; }
.adv h4 { color: var(--c-navy); font-size: 16px; margin-bottom: 4px; }
.adv p { color: var(--c-gray); font-size: 14px; }

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, #13558c, #1d7fb8);
  color: #fff; border-radius: 24px; padding: 56px 40px; text-align: center;
  box-shadow: var(--shadow);
}
.cta-band h2 { font-size: 30px; margin-bottom: 12px; }
.cta-band p { color: rgba(255,255,255,.85); margin-bottom: 26px; font-size: 16px; }

/* contact */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.contact-info .row { display: flex; gap: 14px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--c-line); }
.contact-info .row .ic { width: 42px; height: 42px; border-radius: 12px; background: linear-gradient(135deg, var(--c-sky), var(--c-cyan)); color: #fff; display: flex; align-items: center; justify-content: center; flex: none; }
.contact-info .row .k { font-size: 13px; color: var(--c-gray); }
.contact-info .row .v { font-size: 17px; font-weight: 700; color: var(--c-navy); }
.contact-info .row .qr-hint { font-size: 12px; color: var(--c-gray); margin-top: 6px; }
.contact-info .row .qr { display: block; width: 150px; height: auto; margin-top: 10px; border: 1px solid var(--c-line); border-radius: 10px; padding: 6px; background: #fff; }
.contact-note { background: var(--c-bg); border: 1px solid var(--c-line); border-radius: var(--radius); padding: 22px; font-size: 14px; color: var(--c-gray); }
.contact-note b { color: var(--c-navy); }

/* demo */
.demo-box { background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius); padding: 40px; text-align: center; box-shadow: var(--shadow); }
.demo-box .shot { border: 1px solid var(--c-line); border-radius: 12px; overflow: hidden; margin: 24px 0; background: var(--c-bg); }
.demo-meta { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin: 18px 0; }
.demo-meta .pill { background: var(--c-bg); border: 1px solid var(--c-line); border-radius: 999px; padding: 8px 16px; font-size: 14px; color: var(--c-navy); font-weight: 600; }
.demo-meta .pill b { color: var(--c-sky); }

/* ===== 演示须知弹窗 ===== */
.modal-mask {
  position: fixed; inset: 0; z-index: 999;
  display: none; align-items: center; justify-content: center;
  background: rgba(11, 37, 69, 0.55); backdrop-filter: blur(3px);
  padding: 20px;
}
.modal-mask.show { display: flex; animation: mmFade .2s ease; }
@keyframes mmFade { from { opacity: 0 } to { opacity: 1 } }
.modal-card {
  position: relative; width: 100%; max-width: 540px;
  background: #fff; border-radius: 18px; padding: 30px 30px 26px;
  box-shadow: 0 24px 60px rgba(11, 37, 69, 0.30);
  animation: mcPop .25s cubic-bezier(.2, .8, .3, 1.2);
}
@keyframes mcPop { from { transform: translateY(16px) scale(.97); opacity: 0 } to { transform: none; opacity: 1 } }
.modal-close {
  position: absolute; top: 14px; right: 16px;
  width: 30px; height: 30px; border: none; border-radius: 50%;
  background: #f1f4f8; color: #5b6677; font-size: 20px; line-height: 1;
  cursor: pointer; transition: background .2s;
}
.modal-close:hover { background: #e3e9f0; }
.modal-badge {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 1px;
  color: var(--c-accent); background: #fff3e8; border: 1px solid #ffd9b8;
  padding: 4px 12px; border-radius: 999px; margin-bottom: 12px;
}
.modal-card h3 { font-size: 22px; color: var(--c-navy); margin-bottom: 10px; }
.modal-lead { font-size: 14.5px; color: var(--c-gray); margin-bottom: 18px; }
.modal-lead strong { color: var(--c-blue); }

/* 吸睛焦点：可定制 */
.modal-hero {
  display: flex; gap: 14px; align-items: flex-start;
  background: linear-gradient(135deg, #fff6ec 0%, #ffe9d2 100%);
  border: 1.5px solid #ffc58a; border-radius: 14px;
  padding: 16px 18px; margin-bottom: 18px;
  box-shadow: 0 6px 18px rgba(255, 122, 24, .15);
}
.modal-hero-ico { font-size: 30px; line-height: 1.2; filter: drop-shadow(0 2px 3px rgba(255,122,24,.3)); }
.modal-hero-bd { flex: 1; }
.modal-hero-t { font-size: 17px; font-weight: 800; color: #c2410c; margin-bottom: 6px; }
.modal-hero-t .hl { color: var(--c-accent); }
.modal-hero-s { font-size: 13.5px; color: #6b4a2e; line-height: 1.7; }
.modal-hero-s strong { color: #c2410c; }

.modal-list { list-style: none; display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }
.modal-list li { display: flex; gap: 10px; align-items: flex-start; }
.modal-list .dot { color: var(--c-cyan); font-size: 14px; line-height: 1.6; }
.modal-list b { color: var(--c-navy); }
.modal-list p { font-size: 13.5px; color: var(--c-gray); }
.modal-foot { font-size: 13px; color: var(--c-gray); margin-bottom: 18px; }
.modal-foot a { color: var(--c-sky); font-weight: 600; }
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; }
.btn-ghost {
  background: #fff; color: var(--c-gray); border: 1px solid var(--c-line);
  padding: 10px 18px; border-radius: 10px; font-size: 14px; cursor: pointer;
  transition: background .2s;
}
.btn-ghost:hover { background: var(--c-bg); }

/* ---------- Customization highlight band ---------- */
.hl-band {
  background:
    radial-gradient(1000px 420px at 85% -20%, rgba(255,179,71,.22), transparent 60%),
    linear-gradient(135deg, #0b2545 0%, #13558c 55%, #1d7fb8 100%);
  color: #fff;
}
.hl-band .section-head h2 { color: #fff; }
.hl-band .section-head p { color: rgba(255,255,255,.85); }
.hl-band .eyebrow { color: #7fd6e0; }
.hl-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 38px; }
.hl-item {
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16);
  border-radius: 16px; padding: 24px 20px; transition: transform .2s, background .2s;
}
.hl-item:hover { background: rgba(255,255,255,.13); transform: translateY(-4px); }
.hl-ic { font-size: 32px; display: block; margin-bottom: 12px; }
.hl-item h4 { color: #fff; font-size: 16.5px; margin-bottom: 8px; }
.hl-item p { color: rgba(255,255,255,.78); font-size: 13.5px; line-height: 1.7; }
.hl-note {
  margin-top: 30px; text-align: center; font-size: 16px; font-weight: 700;
  color: #ffd9a8;
}

/* footer */
.site-footer { background: var(--c-navy); color: rgba(255,255,255,.8); padding: 48px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-grid a, .footer-grid p { color: rgba(255,255,255,.7); font-size: 14px; display: block; margin: 6px 0; }
.footer-grid a:hover { color: var(--c-accent2); }
.footer-brand { font-size: 18px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 32px; padding-top: 18px; font-size: 13px; color: rgba(255,255,255,.55); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* responsive */
@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; padding: 60px 20px 70px; }
  .hero-art { display: none; }
  .hero h1 { font-size: 34px; }
  .grid-3, .adv, .steps { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .hl-grid { grid-template-columns: 1fr 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 20px; gap: 14px; border-bottom: 1px solid var(--c-line); }
  .nav-toggle { display: block; }
}
@media (max-width: 560px) {
  .grid-3, .adv, .steps { grid-template-columns: 1fr; }
  .hl-grid { grid-template-columns: 1fr; }
  .shots-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
  .section-head h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; }
  .home-contact { flex-direction: column; align-items: center; }
  .hc-item { width: 100%; max-width: 320px; justify-content: center; }
}

/* screenshots */
.shots-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.shot-card {
  margin: 0; background: #fff; border: 1px solid var(--c-line); border-radius: 12px;
  overflow: hidden; cursor: zoom-in; box-shadow: 0 4px 16px rgba(11,37,69,.06);
  transition: transform .18s ease, box-shadow .18s ease;
}
.shot-card:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(11,37,69,.14); }
.shot-card img { width: 100%; display: block; aspect-ratio: 4 / 3; object-fit: cover; object-position: top; }
.shot-card figcaption { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 4px; }
.shot-card figcaption b { font-size: 15px; color: var(--c-navy); }
.shot-card figcaption span { font-size: 13px; color: var(--c-gray); line-height: 1.6; }

/* lightbox */
.lb-mask {
  position: fixed; inset: 0; background: rgba(6,20,38,.88); display: none;
  align-items: center; justify-content: center; z-index: 999; padding: 24px;
}
.lb-mask.show { display: flex; }
.lb-mask img { max-width: min(1200px, 94vw); max-height: 88vh; border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,.5); background:#fff; }
.lb-close { position: fixed; top: 10px; right: 24px; font-size: 38px; color: #fff; cursor: pointer; line-height: 1; user-select: none; }

/* home contact cards */
.home-contact { margin-top: 30px; display: flex; align-items: stretch; justify-content: center; gap: 18px; flex-wrap: wrap; }
.hc-item {
  display: flex; align-items: center; gap: 14px; background: #fff;
  border: 1px solid var(--c-line); border-radius: 14px; padding: 16px 22px;
  box-shadow: 0 4px 16px rgba(11,37,69,.06); text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease;
}
a.hc-item:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(11,37,69,.12); }
.hc-ico { font-size: 24px; }
.hc-txt { display: flex; flex-direction: column; gap: 2px; text-align: left; }
.hc-txt span { font-size: 12px; color: var(--c-gray); }
.hc-txt b { font-size: 19px; color: var(--c-navy); letter-spacing: .5px; }
.hc-qr { width: 92px; height: 92px; object-fit: cover; border-radius: 8px; border: 1px solid var(--c-line); }
.home-contact .btn { align-self: center; }

/* ---------- 内页页头（page-hero） ---------- */
.page-hero {
  background:
    radial-gradient(1000px 420px at 85% -20%, rgba(255,179,71,.20), transparent 60%),
    linear-gradient(135deg, #0b2545 0%, #13558c 55%, #1d7fb8 100%);
  color: #fff; padding: 60px 0 70px;
}
.page-hero .container { max-width: 920px; text-align: center; }
.page-hero .eyebrow { color: #7fd6e0; font-weight: 700; letter-spacing: 2px; font-size: 13px; text-transform: uppercase; }
.page-hero h1 { font-size: 40px; font-weight: 800; margin: 14px 0 14px; letter-spacing: -.5px; }
.page-hero p { font-size: 17px; color: rgba(255,255,255,.86); max-width: 720px; margin: 0 auto; }
.breadcrumb { font-size: 13px; color: rgba(255,255,255,.72); margin-bottom: 16px; }
.breadcrumb a { color: rgba(255,255,255,.88); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span.sep { margin: 0 8px; opacity: .6; }

/* ---------- 文章正文（article） ---------- */
.article { max-width: 840px; margin: 0 auto; }
.article h2 { font-size: 26px; color: var(--c-navy); margin: 36px 0 14px; }
.article h3 { font-size: 20px; color: var(--c-blue); margin: 26px 0 10px; }
.article p { font-size: 16px; color: var(--c-ink); margin: 14px 0; }
.article .lead-p { color: var(--c-gray); font-size: 17px; }
.article ul.tips { list-style: none; margin: 14px 0 18px; }
.article ul.tips li { position: relative; padding-left: 26px; margin: 11px 0; font-size: 15.5px; color: var(--c-ink); }
.article ul.tips li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--c-cyan); font-weight: 800; }
.article blockquote { margin: 20px 0; padding: 16px 20px; background: var(--c-bg); border-left: 4px solid var(--c-cyan); border-radius: 0 10px 10px 0; color: var(--c-gray); font-size: 15.5px; }

/* 文章元信息 */
.post-meta { font-size: 13.5px; color: var(--c-gray); margin: 12px 0 26px; display: flex; gap: 18px; flex-wrap: wrap; }
.post-meta span b { color: var(--c-blue); }

/* 相关推荐 */
.relate { background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius); padding: 30px; margin-top: 40px; }
.relate h3 { color: var(--c-navy); font-size: 20px; margin-bottom: 18px; }
.relate a { color: var(--c-blue); font-weight: 600; display: block; margin: 10px 0; }
.relate a:hover { text-decoration: underline; }

/* FAQ */
.faq-item { background: var(--c-white); border: 1px solid var(--c-line); border-radius: 12px; padding: 18px 22px; margin-bottom: 14px; }
.faq-item h3 { color: var(--c-navy); font-size: 17px; margin-bottom: 8px; }
.faq-item p { color: var(--c-gray); font-size: 15px; }