:root {
  --mh-ink: #10203f;
  --mh-muted: #64718a;
  --mh-line: #dbe5f4;
  --mh-blue: #2f64bd;
  --mh-blue-dark: #173f86;
  --mh-blue-soft: #eef5ff;
  --mh-steel: #f6f8fb;
  --mh-panel: #ffffff;
  --footer-bg: #0e1d38;
  --footer-bg-deep: #0a1730;
  --max-width: 1180px;
  --header-h: 64px;
  --radius: 8px;
  --shadow-card: 0 12px 34px rgba(16, 32, 63, 0.06);
  --shadow-hover: 0 24px 52px rgba(16, 32, 63, 0.12);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif; color: var(--mh-ink); line-height: 1.6; background: #fff; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
.site-header { position: fixed; inset: 0 0 auto; z-index: 100; height: var(--header-h); background: rgba(255,255,255,.88); border-bottom: 1px solid transparent; backdrop-filter: saturate(180%) blur(14px); transition: background .25s ease, border-color .25s ease, box-shadow .25s ease; }
.site-header.scrolled { background: rgba(255,255,255,.96); border-bottom-color: var(--mh-line); box-shadow: 0 4px 24px rgba(16,32,63,.06); }
.nav-bar { width: min(var(--max-width), calc(100% - 40px)); height: 100%; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-logo img { width: 120px; }
.nav-menu { display: flex; gap: 4px; }
.nav-link { padding: 8px 16px; border-radius: var(--radius); color: var(--mh-ink); font-size: 15px; font-weight: 650; transition: color .2s ease, background .2s ease; }
.nav-link:hover, .nav-link.active { color: var(--mh-blue); background: var(--mh-blue-soft); }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: transparent; cursor: pointer; align-items: center; justify-content: center; flex-direction: column; gap: 5px; }
.nav-toggle span { width: 22px; height: 2px; border-radius: 2px; background: var(--mh-ink); transition: transform .25s ease, opacity .25s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.site-shell { overflow: hidden; background: linear-gradient(180deg, #f8fbff 0%, #fff 34%, #f7f9fc 100%); }
.hero-section, .section { width: min(var(--max-width), calc(100% - 40px)); margin: 0 auto; }
.hero-section { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(340px, .98fr); gap: 54px; align-items: center; padding: calc(78px + var(--header-h)) 0 54px; }
.brand-logo { width: 250px; max-width: 72vw; margin-bottom: 28px; }
.eyebrow { color: var(--mh-blue); font-size: 14px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
.hero-copy h1 { margin-top: 14px; font-size: clamp(42px, 7vw, 74px); line-height: 1.03; font-weight: 800; }
.hero-lede { max-width: 650px; margin-top: 24px; color: var(--mh-muted); font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 24px; border-radius: var(--radius); font-size: 15px; font-weight: 750; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: #fff; background: var(--mh-blue); box-shadow: 0 16px 34px rgba(47,100,189,.26); }
.button.primary:hover { background: var(--mh-blue-dark); }
.button.ghost { color: var(--mh-blue-dark); border: 1px solid #b8cbed; background: #fff; }
.hero-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; max-width: 650px; margin-top: 42px; }
.hero-metrics > div { padding: 18px; border: 1px solid var(--mh-line); border-radius: var(--radius); background: rgba(255,255,255,.82); }
.hero-metrics strong { display: block; color: var(--mh-blue-dark); font-size: 23px; line-height: 1.1; }
.hero-metrics span { display: block; margin-top: 8px; color: var(--mh-muted); font-size: 13px; }
.hero-visual { position: relative; min-height: 560px; display: flex; align-items: center; justify-content: center; }
.hero-banner::before { content: ''; position: absolute; inset: 18px; z-index: 0; border-radius: 24px; background: rgba(76,138,225,.12); filter: blur(28px); }
.hero-banner img { position: relative; z-index: 1; width: min(720px, 100%); border: 1px solid rgba(198,216,241,.72); border-radius: 20px; box-shadow: 0 26px 64px rgba(18,42,83,.13), 0 0 0 10px rgba(255,255,255,.62); }
.section { padding: 92px 0; }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading h2 { margin-top: 10px; font-size: clamp(28px, 4vw, 44px); line-height: 1.18; }
.section-heading p:not(.eyebrow) { margin-top: 14px; color: var(--mh-muted); font-size: 17px; line-height: 1.8; }
.intro-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.intro-grid article, .platform-copy article, .solution-card { border: 1px solid var(--mh-line); border-radius: var(--radius); background: var(--mh-panel); box-shadow: var(--shadow-card); transition: transform .25s ease, box-shadow .25s ease; }
.intro-grid article:hover, .platform-copy article:hover, .solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.intro-grid article { padding: 28px; }
.card-icon { width: 52px; height: 52px; margin-bottom: 18px; display: flex; align-items: center; justify-content: center; border-radius: 12px; background: var(--mh-blue-soft); color: var(--mh-blue); }
.card-icon svg { width: 28px; height: 28px; }
.card-icon--sm { flex: 0 0 auto; width: 44px; height: 44px; margin: 0 16px 0 0; }
.card-icon--sm svg { width: 22px; height: 22px; }
.intro-grid h3, .platform-copy h3, .image-card h3 { font-size: 21px; line-height: 1.3; }
.intro-grid p, .platform-copy p, .image-card p { margin-top: 12px; color: var(--mh-muted); line-height: 1.75; }
.platform-layout { display: grid; grid-template-columns: minmax(280px, .86fr) minmax(0, 1.14fr); gap: 38px; align-items: center; }
.platform-copy { display: grid; gap: 16px; }
.platform-copy article { display: flex; align-items: flex-start; padding: 24px; }
.platform-copy h3 { font-size: 19px; }
.platform-copy p { margin-top: 10px; font-size: 15px; }
.miniapp-overview-card { margin: 0; padding: 12px; border: 1px solid var(--mh-line); border-radius: 16px; background: #fff; box-shadow: 0 18px 40px rgba(16,32,63,.1); }
.miniapp-overview-card img { width: 100%; display: block; border-radius: 8px; }
.panel-gallery { display: grid; grid-template-columns: 1fr; gap: 14px; }
.miniapp-caption { margin-top: 14px; color: var(--mh-muted); font-size: 14px; line-height: 1.7; text-align: center; }
.platform-section .platform-layout { grid-template-columns: minmax(300px, 1.15fr) minmax(0, 0.85fr); gap: 30px; }
.solutions-section { width: 100%; max-width: none; padding-left: max(20px, calc((100vw - var(--max-width)) / 2)); padding-right: max(20px, calc((100vw - var(--max-width)) / 2)); background: var(--mh-steel); }
.solutions-section .section-heading, .solution-grid { width: min(var(--max-width), calc(100% - 40px)); }
.solution-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; margin: 0 auto; }
.solution-card { min-height: 260px; overflow: hidden; }
.image-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: #eef2f6; }
.image-card > div { padding: 22px; }
.image-card h3 { font-size: 19px; }
.image-card p { font-size: 14px; line-height: 1.7; }
.tag { display: inline-block; margin-bottom: 12px; padding: 3px 10px; border-radius: 999px; color: var(--mh-blue); background: var(--mh-blue-soft); font-size: 12px; font-weight: 800; }
.site-footer { color: #b4c0d6; background: var(--footer-bg); }
.footer-grid { width: min(var(--max-width), calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 1.6fr 1fr 1.4fr; gap: 48px; align-items: start; padding: 56px 0 40px; }
.footer-col--brand { display: flex; flex-direction: column; gap: 14px; }
.footer-logo-img { width: 128px; max-width: 100%; }
.footer-tagline { max-width: 360px; color: #c8d3e7; font-size: 15px; line-height: 1.7; }
.footer-agent { max-width: 380px; padding-top: 12px; margin-top: 4px; border-top: 1px solid rgba(255,255,255,.1); color: #8a98b5; font-size: 14px; line-height: 1.75; }
.footer-heading { margin-bottom: 18px; color: #e8eef8; font-size: 14px; font-weight: 750; }
.footer-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.footer-contact-list { display: flex; flex-direction: column; gap: 12px; }
.footer-links a, .footer-contact-list a, .footer-contact-list span { color: #8a98b5; font-size: 14px; line-height: 1.5; transition: color .2s ease, padding-left .2s ease; }
.footer-links a:hover, .footer-contact-list a:hover { color: #fff; }
.footer-links a:hover { padding-left: 4px; }
.footer-contact-list li { display: flex; align-items: flex-start; gap: 10px; }
.footer-contact-icon { flex: 0 0 auto; width: 20px; height: 20px; display: inline-flex; align-items: center; justify-content: center; color: #6aa0f0; }
.footer-contact-icon svg { width: 18px; height: 18px; }
.footer-bottom { padding: 18px 0; border-top: 1px solid rgba(255,255,255,.08); background: var(--footer-bg-deep); }
.footer-bottom-inner { width: min(var(--max-width), calc(100% - 40px)); margin: 0 auto; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; text-align: center; }
.footer-copy, .footer-icp { color: #6b7a99; font-size: 13px; }
.footer-icp a { color: #6b7a99; transition: color .2s ease; }
.footer-icp a:hover { color: #fff; }
.back-to-top { position: fixed; right: 28px; bottom: 28px; z-index: 90; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; border: 0; border-radius: 50%; background: var(--mh-blue); color: #fff; box-shadow: 0 8px 24px rgba(47,100,189,.36); cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(12px); transition: opacity .25s ease, transform .25s ease, visibility .25s ease, background .2s ease; }
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--mh-blue-dark); transform: translateY(-3px); }
.back-to-top svg { width: 22px; height: 22px; }
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .reveal { opacity: 1; transform: none; transition: none; } .button:hover, .intro-grid article:hover, .platform-copy article:hover, .solution-card:hover, .back-to-top:hover { transform: none; } }
@media (max-width: 980px) { .hero-section, .platform-layout { grid-template-columns: 1fr; } .hero-section { min-height: auto; padding-top: calc(56px + var(--header-h)); } .hero-visual { min-height: 440px; } .intro-grid { grid-template-columns: 1fr; } .solution-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; } .footer-col--brand { grid-column: 1 / -1; } }
@media (max-width: 720px) { .nav-menu { position: fixed; top: var(--header-h); left: 0; right: 0; flex-direction: column; gap: 0; padding: 8px 0; border-bottom: 1px solid var(--mh-line); background: rgba(255,255,255,.98); box-shadow: 0 12px 32px rgba(16,32,63,.1); transform: translateY(-130%); opacity: 0; pointer-events: none; transition: transform .25s ease, opacity .25s ease; } .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; } .nav-link { padding: 14px 24px; border-radius: 0; } .nav-toggle { display: flex; } .brand-logo { width: 180px; margin-bottom: 20px; } .hero-section, .section { width: min(100% - 28px, var(--max-width)); } .hero-copy h1 { font-size: 34px; line-height: 1.16; } .hero-lede, .section-heading p:not(.eyebrow) { font-size: 16px; } .hero-metrics, .solution-grid { grid-template-columns: 1fr; } .intro-grid article, .platform-copy article { padding: 20px; } .platform-copy article { display: block; } .card-icon--sm { margin: 0 0 14px; } .hero-visual { min-height: 320px; } .section { padding: 64px 0; } .footer-grid { grid-template-columns: 1fr; gap: 28px; padding: 40px 0 28px; } .footer-col--brand { grid-column: auto; } .footer-bottom-inner { flex-direction: column; align-items: center; gap: 6px; } .back-to-top { right: 20px; bottom: 20px; } }