/* =========================================================
   MASP — Design System
   Palette : navy #0E2A47 / amber #F6A21E / teal #1F8A8C
   Type    : Sora (display) + Manrope (body)
   Grid    : 8pt | Radius 14/8 | 3-level elevation
   ========================================================= */
:root {
  --navy: #0E2A47;
  --navy-d: #163A5F;
  --amber: #F6A21E;
  --amber-d: #E08A0B;
  --teal: #1F8A8C;
  --bg: #F4F6F9;
  --card: #FFFFFF;
  --ink: #16202B;
  --muted: #5B6776;
  --line: #E3E8EF;
  --r: 14px;
  --r-sm: 8px;
  --s1: 0 1px 2px rgba(16,32,55,.06), 0 1px 3px rgba(16,32,55,.08);
  --s2: 0 8px 24px rgba(16,32,55,.10);
  --s3: 0 18px 50px rgba(16,32,55,.16);
  --maxw: 1200px;
  --ease: cubic-bezier(.22,.61,.36,1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Manrope", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4 { font-family: "Sora", sans-serif; line-height: 1.15; margin: 0 0 .5em; color: var(--navy); letter-spacing: -.01em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; }
a { color: var(--navy-d); text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.text-wrap-pretty { text-wrap: pretty; }
.muted { color: var(--muted); }
.center { text-align: center; }
.eyebrow { color: var(--amber-d); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; font-size: .8rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "Sora", sans-serif; font-weight: 600; font-size: .95rem;
  padding: 14px 26px; border-radius: var(--r-sm); border: 0; cursor: pointer;
  transition: transform .15s var(--ease), box-shadow .2s var(--ease), background .2s;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary { background: var(--amber); color: #1c1206; box-shadow: var(--s1); }
.btn-primary:hover { background: var(--amber-d); box-shadow: var(--s2); }
.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,.22); }
.btn-outline { background: transparent; color: var(--navy); border: 1.5px solid var(--line); }
.btn-outline:hover { border-color: var(--navy); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
  background: transparent;
}
.site-header.scrolled, .site-header.solid { background: rgba(255,255,255,.96); backdrop-filter: blur(10px); box-shadow: var(--s1); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav .logo { display: inline-flex; align-items: center; }
.nav .logo img { height: 44px; width: auto; }
.nav .logo .logo-light { display: none; }
/* 首页未滚动时头部透明压深色 Hero，切换为反白 Logo */
.site-header:not(.scrolled):not(.solid) .logo .logo-light { display: block; }
.site-header:not(.scrolled):not(.solid) .logo .logo-dark { display: none; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { font-weight: 600; font-size: .95rem; color: #fff; transition: color .2s; }
.site-header.scrolled .nav-links a, .site-header.solid .nav-links a { color: var(--navy); }
.nav-links a:hover { color: var(--amber); }
.nav-cta { margin-left: 8px; }
.lang-switch { display: inline-flex; gap: 4px; align-items: center; margin-left: 6px; font-size: .8rem; font-weight: 700; }
.lang-switch a { color: var(--amber); padding: 3px 7px; border-radius: 6px; text-decoration: none; opacity: .8; border: 1px solid transparent; transition: opacity .2s, background .2s, color .2s; }
.site-header.scrolled .lang-switch a:not(.on), .site-header.solid .lang-switch a:not(.on) { color: var(--amber); }
.lang-switch a:hover { opacity: 1; }
.lang-switch a.on { background: var(--amber); color: #1c1206; opacity: 1; }
.menu-toggle { display: none; background: none; border: 0; cursor: pointer; width: 40px; height: 40px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: #fff; margin: 5px auto; transition: .3s; }
.site-header.scrolled .menu-toggle span, .site-header.solid .menu-toggle span { background: var(--navy); }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; color: #fff; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .35; }
.hero-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(14,42,71,.92), rgba(14,42,71,.65)); }
.hero .container { position: relative; z-index: 1; padding-top: 120px; }
.hero h1 { color: #fff; max-width: 16ch; }
.hero p { font-size: 1.15rem; max-width: 56ch; color: rgba(255,255,255,.86); }
.hero-actions { display: flex; gap: 16px; margin-top: 28px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 56px; flex-wrap: wrap; }
.hero-stats .num { font-family: "Sora"; font-size: 2rem; font-weight: 700; color: var(--amber); }
.hero-stats .lbl { font-size: .85rem; color: rgba(255,255,255,.7); }

/* ---------- Sections ---------- */
section { padding: 88px 0; }
.section-head { max-width: 640px; margin: 0 auto 48px; text-align: center; }
.section-head p { color: var(--muted); }

/* Advantages */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 28px; box-shadow: var(--s1); transition: transform .25s var(--ease), box-shadow .25s; }
.adv-card:hover { transform: translateY(-6px); box-shadow: var(--s2); }
.adv-card img { width: 56px; height: 56px; margin-bottom: 16px; }
.adv-card h3 { font-size: 1.1rem; }

/* Product grid */
.cat-bar { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 36px; }
.cat-chip { padding: 9px 18px; border-radius: 999px; border: 1px solid var(--line); background: #fff; font-weight: 600; font-size: .9rem; cursor: pointer; transition: .2s; }
.cat-chip:hover { border-color: var(--navy); }
.cat-chip.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.prod-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; box-shadow: var(--s1); transition: transform .25s var(--ease), box-shadow .25s; display: flex; flex-direction: column; }
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--s2); }
.prod-card .thumb { aspect-ratio: 4/3; overflow: hidden; background: var(--bg); display: flex; align-items: center; justify-content: center; padding: 12px; }
.prod-card .thumb img { width: 100%; height: 100%; object-fit: contain; transition: transform .4s var(--ease); }
.prod-card:hover .thumb img { transform: scale(1.05); }
.prod-card .body { padding: 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.tag { align-self: flex-start; font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--teal); background: rgba(31,138,140,.1); padding: 4px 10px; border-radius: 999px; }
.prod-card h3 { font-size: 1.05rem; margin: 0; }
.prod-card .desc { color: var(--muted); font-size: .92rem; flex: 1; }
.prod-card .foot { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; }
.price-note { font-size: .82rem; color: var(--muted); }

/* Solutions */
.sol-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.sol-card { position: relative; border-radius: var(--r); overflow: hidden; min-height: 260px; display: flex; align-items: flex-end; color: #fff; box-shadow: var(--s1); }
.sol-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .55; transition: transform .4s var(--ease); }
.sol-card:hover img { transform: scale(1.06); }
.sol-card::after { content:""; position:absolute; inset:0; background: linear-gradient(0deg, rgba(14,42,71,.9), rgba(14,42,71,.2)); }
.sol-card .inner { position: relative; z-index: 1; padding: 28px; }
.sol-card h3 { color: #fff; }
.sol-card p { color: rgba(255,255,255,.82); font-size: .92rem; }
.sol-card .more { color: var(--amber); font-weight: 700; }

/* Cases */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { border-radius: var(--r); overflow: hidden; background: var(--card); box-shadow: var(--s1); }
.case-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.case-card .body { padding: 20px; }
.case-card h3 { font-size: 1.05rem; }
.case-card p { color: var(--muted); font-size: .9rem; margin: 0; }

/* CTA band */
.cta-band { background: var(--navy); color: #fff; border-radius: var(--r); padding: 56px; text-align: center; }
.cta-band h2 { color: #fff; }

/* About */
.about-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-wrap img { border-radius: var(--r); box-shadow: var(--s2); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 36px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; text-align: center; box-shadow: var(--s1); }
.stat .num { font-family: "Sora"; font-size: 1.9rem; font-weight: 700; color: var(--amber-d); }
.stat .lbl { font-size: .82rem; color: var(--muted); }
.badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.badge { border: 1px solid var(--line); border-radius: var(--r-sm); padding: 8px 14px; font-weight: 700; font-size: .8rem; color: var(--navy); background: #fff; }

/* Contact / form */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.form-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 32px; box-shadow: var(--s1); }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 6px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--r-sm);
  font-family: inherit; font-size: .95rem; background: #fff; color: var(--ink); transition: border .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--navy); box-shadow: 0 0 0 3px rgba(14,42,71,.12); }
.field textarea { min-height: 110px; resize: vertical; }
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list li { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.info-list .k { color: var(--muted); min-width: 90px; font-weight: 600; }
.form-status { margin-top: 14px; padding: 12px 14px; border-radius: var(--r-sm); font-weight: 600; display: none; }
.form-status.ok { display: block; background: rgba(31,138,140,.12); color: var(--teal); }
.form-status.err { display: block; background: rgba(224,138,11,.12); color: var(--amber-d); }

/* Product detail */
.breadcrumb { font-size: .85rem; color: var(--muted); margin-bottom: 20px; }
.detail-wrap { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
.detail-wrap .thumb img { border-radius: var(--r); box-shadow: var(--s2); width: 100%; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 18px; }
.spec-table td { padding: 12px 14px; border-bottom: 1px solid var(--line); font-size: .92rem; }
.spec-table td:first-child { color: var(--muted); font-weight: 600; width: 40%; }
.price-box { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; box-shadow: var(--s1); margin-top: 22px; }

/* Product gallery (public detail) */
.gallery-main { border-radius: var(--r); overflow: hidden; box-shadow: var(--s2); background: var(--bg); }
.gallery-main img { width: 100%; display: block; }
.gallery-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.gthumb { width: 84px; height: 64px; padding: 0; border: 2px solid transparent; border-radius: 8px; overflow: hidden; background: var(--bg); cursor: pointer; transition: border-color .15s; }
.gthumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gthumb.active { border-color: var(--amber); }
.prod-videos video { width: 100%; border-radius: var(--r); margin-top: 10px; box-shadow: var(--s1); background: #000; }

/* Media manager (admin) */
.media-row { display: flex; gap: 10px; align-items: center; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--r-sm); background: #fff; margin-bottom: 8px; flex-wrap: wrap; }
.media-row select.m-type { width: 110px; }
.media-row .m-url { flex: 1; min-width: 200px; }
.media-row .m-preview { width: 96px; height: 72px; border-radius: 6px; overflow: hidden; background: var(--bg); display: flex; align-items: center; justify-content: center; }
.media-row .m-preview img, .media-row .m-preview video { width: 100%; height: 100%; object-fit: cover; }
.media-row .m-remove { color: #c0392b; background: none; border: 0; cursor: pointer; font-weight: 700; font-size: 1.1rem; line-height: 1; padding: 4px 8px; }
.media-row .m-remove:hover { color: #e74c3c; }

/* Footer */
.site-footer { background: var(--navy); color: rgba(255,255,255,.78); padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 32px; }
.site-footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
.site-footer a { color: rgba(255,255,255,.78); display: block; padding: 5px 0; }
.site-footer a:hover { color: var(--amber); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 36px; padding-top: 20px; font-size: .85rem; color: rgba(255,255,255,.55); }
.footer-brand img { height: 32px; margin-bottom: 14px; filter: brightness(0) invert(1); }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Admin ---------- */
.admin-body { background: #eef1f6; }
.admin-nav { background: var(--navy); color: #fff; padding: 14px 0; }
.admin-nav .container { display: flex; align-items: center; justify-content: space-between; }
.admin-nav a { color: rgba(255,255,255,.85); margin-right: 18px; font-weight: 600; font-size: .9rem; }
.admin-nav a:hover { color: var(--amber); }
.admin-container { max-width: 980px; margin: 32px auto; padding: 0 24px; }
.admin-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 28px; box-shadow: var(--s1); margin-bottom: 24px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); font-size: .9rem; vertical-align: top; }
.admin-table th { color: var(--muted); font-weight: 700; }
.badge-status { padding: 4px 10px; border-radius: 999px; font-size: .75rem; font-weight: 700; }
.st-new { background: rgba(246,162,30,.18); color: var(--amber-d); }
.st-replied { background: rgba(31,138,140,.16); color: var(--teal); }
.st-closed { background: rgba(91,103,118,.16); color: var(--muted); }
.btn-sm { padding: 7px 14px; font-size: .82rem; }
.btn-danger { background: #e23b3b; color: #fff; }
.btn-danger:hover { background: #c22f2f; }
textarea.code { width: 100%; min-height: 320px; font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: .85rem; border: 1px solid var(--line); border-radius: var(--r-sm); padding: 14px; }
.upload-row { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.upload-row img { width: 90px; height: 64px; object-fit: cover; border-radius: var(--r-sm); border: 1px solid var(--line); }
.login-wrap { max-width: 380px; margin: 12vh auto; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .sol-grid, .about-wrap, .contact-wrap, .detail-wrap { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  section { padding: 60px 0; }
  .nav-links { position: fixed; inset: 72px 0 auto 0; flex-direction: column; background: #fff; padding: 20px 24px; gap: 16px; box-shadow: var(--s2); transform: translateY(-120%); transition: transform .3s var(--ease); }
  .nav-links.open { transform: none; }
  .nav-links a { color: var(--navy); }
  .menu-toggle { display: block; }
  .adv-grid, .prod-grid, .case-grid, .stats-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}