:root {
  --navy-900: #071626;
  --navy-800: #0b1e33;
  --navy-700: #123154;
  --blue-600: #1a5fa8;
  --cyan-500: #17b0bf;
  --cyan-400: #2ac6d4;
  --cyan-100: #dff5f7;
  --orange-500: #e8833a;
  --orange-100: #fdeee1;
  --ink-900: #16324a;
  --ink-600: #46617a;
  --ink-400: #7c93a8;
  --bg-light: #f6f9fc;
  --bg-card: #ffffff;
  --line: #e2ebf2;
  --radius: 16px;
  --shadow-sm: 0 2px 10px rgba(11, 30, 51, 0.06);
  --shadow-md: 0 10px 30px rgba(11, 30, 51, 0.10);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC",
    "Source Han Sans SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink-900);
  background: #ffffff;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--blue-600); text-decoration: none; }
a:hover { color: var(--cyan-500); }

:focus-visible { outline: 3px solid var(--cyan-400); outline-offset: 2px; border-radius: 4px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--navy-800); color: #fff; padding: 8px 16px; z-index: 200;
}
.skip-link:focus { left: 12px; top: 12px; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ===== Navbar ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(7, 22, 38, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(42, 198, 212, 0.18);
}
.nav-bar {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; color: #fff; }
.brand:hover { color: #fff; }
.brand svg { width: 30px; height: 30px; flex: none; }
.brand .brand-name { font-size: 19px; font-weight: 700; letter-spacing: 2px; }
.brand .brand-sub { font-size: 10px; color: var(--cyan-400); letter-spacing: 3px; display: block; margin-top: -4px; }

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  color: rgba(255, 255, 255, 0.82); font-size: 15px;
  padding: 8px 13px; border-radius: 8px; transition: all 0.2s;
}
.nav-links a:hover { color: #fff; background: rgba(42, 198, 212, 0.14); }
.nav-links a.active { color: var(--cyan-400); font-weight: 600; }

.nav-cta {
  margin-left: 10px; padding: 8px 18px;
  background: linear-gradient(135deg, var(--cyan-500), var(--blue-600));
  color: #fff !important; border-radius: 999px; font-weight: 600;
}
.nav-cta:hover { filter: brightness(1.1); }

.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 40px; height: 40px; border-radius: 8px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; background: #fff;
  margin: 5px auto; border-radius: 2px; transition: all 0.25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Buttons ===== */
.btn {
  display: inline-block; padding: 13px 30px; border-radius: 999px;
  font-size: 16px; font-weight: 600; line-height: 1.4;
  transition: all 0.2s; cursor: pointer; border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--cyan-500), var(--blue-600));
  color: #fff; box-shadow: 0 6px 20px rgba(26, 95, 168, 0.35);
}
.btn-primary:hover { filter: brightness(1.08); color: #fff; transform: translateY(-2px); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.08); color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.18); color: #fff; }

/* ===== Home Hero ===== */
.home-hero {
  position: relative; min-height: 96vh;
  display: flex; flex-direction: column; justify-content: center;
  background: var(--navy-900) url("../images/hero-home.png") center 38% / cover no-repeat;
}
.home-hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(7, 22, 38, 0.82) 0%, rgba(7, 22, 38, 0.45) 42%, rgba(7, 22, 38, 0.88) 100%);
}
.home-hero .container { position: relative; z-index: 1; padding-top: 110px; padding-bottom: 40px; }
.hero-kicker {
  display: inline-block; color: var(--cyan-400); font-size: 15px;
  letter-spacing: 6px; margin-bottom: 18px; font-weight: 600;
}
.hero-title {
  color: #fff; font-size: clamp(34px, 5.6vw, 60px);
  font-weight: 800; line-height: 1.25; letter-spacing: 1px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
}
.hero-title .accent { color: var(--cyan-400); }
.hero-sub {
  color: rgba(255, 255, 255, 0.88); font-size: clamp(16px, 2vw, 20px);
  margin: 20px 0 8px; max-width: 640px;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 34px; }
.hero-tags span {
  color: rgba(255, 255, 255, 0.92); font-size: 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(42, 198, 212, 0.4);
  padding: 6px 16px; border-radius: 999px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }

.hero-stats {
  position: relative; z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(7, 22, 38, 0.55);
  backdrop-filter: blur(6px);
}
.hero-stats .container {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 12px; padding-top: 22px; padding-bottom: 22px;
}
.stat { text-align: center; padding: 6px 10px; }
.stat b { display: block; color: var(--cyan-400); font-size: 26px; font-weight: 800; line-height: 1.3; }
.stat span { color: rgba(255, 255, 255, 0.75); font-size: 13.5px; }

/* ===== Sections ===== */
.section { padding: 84px 0; }
.section.alt { background: var(--bg-light); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-kicker {
  color: var(--cyan-500); font-size: 14px; font-weight: 700;
  letter-spacing: 4px; margin-bottom: 10px;
}
.section-title { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; color: var(--ink-900); line-height: 1.35; }
.section-desc { color: var(--ink-600); margin-top: 14px; font-size: 17px; }

/* ===== Systems grid (home) ===== */
.systems-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.system-card {
  background: var(--bg-card); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
  transition: all 0.25s; display: flex; flex-direction: column;
}
.system-card:hover {
  transform: translateY(-6px); box-shadow: var(--shadow-md);
  border-color: rgba(23, 176, 191, 0.5);
}
.system-card .thumb { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.system-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.system-card:hover .thumb img { transform: scale(1.06); }
.system-card .thumb .badge {
  position: absolute; top: 12px; left: 12px;
  width: 38px; height: 38px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
}
.system-card .body { padding: 18px 18px 20px; flex: 1; display: flex; flex-direction: column; }
.system-card h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 8px; }
.system-card p { color: var(--ink-600); font-size: 14px; flex: 1; }
.system-card .more {
  margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--cyan-500);
}
.system-card .more::after { content: " →"; }

/* ===== Hub split ===== */
.hub-split {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 60px; align-items: center;
}
.hub-split .img-wrap { position: relative; }
.hub-split .img-wrap img {
  border-radius: var(--radius); box-shadow: var(--shadow-md);
}
.hub-split .img-wrap::after {
  content: ""; position: absolute; inset: -14px;
  border: 2px dashed rgba(23, 176, 191, 0.35);
  border-radius: 22px; z-index: -1;
}
.hub-points { list-style: none; display: grid; gap: 18px; }
.hub-points li {
  display: flex; gap: 14px; background: #fff;
  border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 18px; box-shadow: var(--shadow-sm);
}
.hub-points .pt-icon {
  flex: none; width: 44px; height: 44px; border-radius: 12px;
  background: var(--cyan-100); color: #0e7d8a;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
}
.hub-points b { display: block; font-size: 16.5px; margin-bottom: 2px; }
.hub-points p { color: var(--ink-600); font-size: 14.5px; }

/* ===== Feature cards (advantages / services / detail features) ===== */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.info-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 24px;
  box-shadow: var(--shadow-sm); transition: all 0.22s;
}
.info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.info-card .ic {
  width: 50px; height: 50px; border-radius: 14px;
  background: linear-gradient(135deg, var(--cyan-100), #eaf3fb);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 16px;
}
.info-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.info-card p { color: var(--ink-600); font-size: 14.5px; }

/* ===== Audience chips ===== */
.audience-wrap { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; max-width: 900px; margin: 0 auto; }
.audience-chip {
  background: #fff; border: 1px solid var(--line);
  border-radius: 999px; padding: 12px 24px;
  color: var(--ink-900); font-size: 15.5px;
  box-shadow: var(--shadow-sm); transition: all 0.2s;
  display: flex; align-items: center; gap: 9px;
}
.audience-chip:hover { border-color: var(--cyan-500); color: var(--cyan-500); transform: translateY(-2px); }
.audience-chip .dot { color: var(--orange-500); }

/* ===== Packages ===== */
.packages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pkg-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 22px; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; transition: all 0.22s; position: relative;
}
.pkg-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.pkg-card.featured {
  background: linear-gradient(160deg, var(--navy-800), #10375e);
  border-color: transparent; color: #fff;
}
.pkg-card.featured .pkg-body, .pkg-card.featured .pkg-scene { color: rgba(255, 255, 255, 0.85); }
.pkg-name { font-size: 18px; font-weight: 800; }
.pkg-card.featured .pkg-name { color: var(--cyan-400); }
.pkg-tag {
  font-size: 12.5px; color: var(--cyan-500); font-weight: 600;
  letter-spacing: 1px; margin-bottom: 4px;
}
.pkg-card.featured .pkg-tag { color: var(--cyan-400); }
.pkg-body {
  color: var(--ink-600); font-size: 14.5px; flex: 1;
  margin: 14px 0 10px; padding-top: 14px;
  border-top: 1px dashed var(--line);
}
.pkg-card.featured .pkg-body { border-top-color: rgba(255, 255, 255, 0.25); }
.pkg-scene {
  color: var(--ink-400); font-size: 13.5px;
  display: flex; align-items: center; gap: 6px;
}
.pkg-scene::before { content: "▸"; color: var(--orange-500); font-size: 15px; }
.pkg-card.featured .pkg-scene::before { color: var(--orange-500); }

/* ===== Contact ===== */
.contact-band {
  background:
    radial-gradient(900px 400px at 15% 0%, rgba(23, 176, 191, 0.28), transparent 60%),
    radial-gradient(700px 380px at 90% 100%, rgba(232, 131, 58, 0.2), transparent 55%),
    var(--navy-800);
  color: #fff;
}
.contact-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 60px; align-items: center; }
.contact-quote {
  font-size: clamp(19px, 2.6vw, 26px); font-weight: 600; line-height: 1.7;
  color: #fff; margin-bottom: 10px;
}
.contact-quote .accent { color: var(--cyan-400); }
.contact-sub { color: rgba(255, 255, 255, 0.72); margin-top: 10px; }
.contact-list { list-style: none; display: grid; gap: 16px; }
.contact-list li {
  display: flex; align-items: center; gap: 14px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px; padding: 15px 20px;
}
.contact-list .ci {
  flex: none; width: 42px; height: 42px; border-radius: 12px;
  background: rgba(42, 198, 212, 0.16);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.contact-list b { display: block; font-size: 13px; color: rgba(255, 255, 255, 0.6); font-weight: 400; }
.contact-list span { font-size: 16.5px; }

/* ===== Detail pages ===== */
.page-body { padding-top: 64px; }
.page-hero {
  background:
    radial-gradient(700px 340px at 85% 10%, rgba(23, 176, 191, 0.12), transparent 60%),
    radial-gradient(560px 300px at 5% 95%, rgba(232, 131, 58, 0.08), transparent 55%),
    var(--bg-light);
  padding: 76px 0 84px;
}
.page-hero-split {
  display: grid; grid-template-columns: 1fr 1.1fr;
  gap: 56px; align-items: center;
}
.page-hero-split .img-wrap img { border-radius: var(--radius); box-shadow: var(--shadow-md); }
.ph-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--cyan-500); font-weight: 700; font-size: 14px;
  letter-spacing: 3px; margin-bottom: 14px;
}
.ph-kicker .ic {
  width: 34px; height: 34px; border-radius: 10px; background: var(--cyan-100);
  display: inline-flex; align-items: center; justify-content: center; font-size: 18px;
}
.page-hero h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 800; line-height: 1.3; }
.page-hero .lead { color: var(--ink-600); font-size: 17px; margin: 18px 0 30px; max-width: 520px; }
.page-hero .hero-actions { gap: 14px; }
.btn-outline {
  background: #fff; color: var(--navy-800);
  border: 1.5px solid var(--navy-800); font-weight: 700;
}
.btn-outline:hover { background: var(--navy-800); color: #fff; }
.btn-solid {
  background: linear-gradient(135deg, var(--cyan-500), var(--blue-600));
  color: #fff; font-weight: 700; box-shadow: 0 6px 18px rgba(26, 95, 168, 0.3);
}
.btn-solid:hover { filter: brightness(1.08); color: #fff; transform: translateY(-2px); }

.feature-table { padding: 84px 0; }

/* CTA band (detail pages) */
.cta-band {
  background:
    radial-gradient(700px 300px at 12% 20%, rgba(23, 176, 191, 0.3), transparent 55%),
    linear-gradient(120deg, var(--navy-800), var(--navy-700));
  color: #fff; padding: 66px 0; text-align: center;
}
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; margin-bottom: 12px; }
.cta-band p { color: rgba(255, 255, 255, 0.75); margin-bottom: 28px; font-size: 16.5px; }
.cta-band .hero-actions { justify-content: center; }

/* ===== Footer ===== */
.site-footer { background: var(--navy-900); color: rgba(255, 255, 255, 0.72); padding: 56px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 48px;
  padding-bottom: 40px;
}
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.site-footer .f-brand { display: flex; align-items: center; gap: 10px; color: #fff; margin-bottom: 14px; }
.site-footer .f-brand svg { width: 28px; height: 28px; }
.site-footer .f-slogan { font-size: 14.5px; line-height: 1.9; max-width: 380px; }
.site-footer ul { list-style: none; display: grid; gap: 10px; }
.site-footer ul a { color: rgba(255, 255, 255, 0.72); font-size: 14.5px; }
.site-footer ul a:hover { color: var(--cyan-400); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 0; text-align: center; font-size: 13.5px; color: rgba(255, 255, 255, 0.45);
}

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ===== Responsive ===== */
@media (max-width: 1020px) {
  .systems-grid { grid-template-columns: repeat(3, 1fr); }
  .packages-grid { grid-template-columns: repeat(3, 1fr); }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .hub-split, .page-hero-split { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 1080px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(7, 22, 38, 0.97);
    flex-direction: column; align-items: stretch;
    padding: 12px 24px 22px; gap: 4px;
    border-bottom: 1px solid rgba(42, 198, 212, 0.2);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; font-size: 16px; }
  .nav-cta { margin: 8px 0 0; text-align: center; }
  .home-hero { min-height: 88vh; }
  .hero-stats .container { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 60px 0; }
}

@media (max-width: 640px) {
  .systems-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .packages-grid { grid-template-columns: 1fr; }
  .card-grid, .card-grid.cols-2 { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .section-head { margin-bottom: 36px; }
}