/* EnviXionAI 晶耀智远 — site styles */
:root {
  --ink: #0b1220;
  --ink-2: #101a2e;
  --ink-3: #16233c;
  --cyan: #2ea8d5;
  --blue: #1e5edc;
  --blue-deep: #123a8f;
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #1b2432;
  --muted: #5b6b82;
  --line: #e3e9f1;
  --on-dark: #eaf1fa;
  --on-dark-muted: #9fb0c7;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(11, 18, 32, 0.08);
  --maxw: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* language toggle: body carries lang-zh or lang-en */
body.lang-zh .en { display: none !important; }
body.lang-en .zh { display: none !important; }

img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 88px;
}
.brand { display: flex; align-items: baseline; gap: 10px; color: #fff; font-weight: 700; }
.brand .b-en { font-size: 20px; letter-spacing: 0.2px; }
.brand .b-en em { font-style: normal; color: var(--cyan); }
.brand .b-zh { font-size: 13px; color: var(--on-dark-muted); font-weight: 500; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--muted); font-size: 14.5px; font-weight: 500; transition: color 0.15s; }
.nav a:hover, .nav a.active { color: var(--ink); }

.nav .dropdown { position: relative; }
.nav .dropdown > a::after { content: " ▾"; font-size: 10px; }
.nav .dropdown-menu {
  display: none; position: absolute; top: 100%; left: -14px; padding: 10px 0;
  min-width: 210px; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; box-shadow: 0 16px 40px rgba(11,18,32,0.15);
}
.nav .dropdown:hover .dropdown-menu { display: block; }
.nav .dropdown-menu a { display: block; padding: 8px 18px; font-size: 14px; }
.nav .dropdown-menu a:hover { background: rgba(46,168,213,0.12); }

.lang-switch {
  border: 1px solid #c8d2e0; border-radius: 999px;
  color: var(--ink); background: transparent; cursor: pointer;
  font-size: 13px; padding: 5px 14px; font-family: inherit;
}
.lang-switch:hover { border-color: var(--blue); color: var(--blue); }

.menu-btn { display: none; background: none; border: none; color: var(--ink); font-size: 24px; cursor: pointer; }

/* ---------- Hero (dark) ---------- */
.hero {
  background:
    radial-gradient(900px 420px at 80% -10%, rgba(30, 94, 220, 0.35), transparent 60%),
    radial-gradient(700px 400px at 10% 110%, rgba(46, 168, 213, 0.18), transparent 60%),
    var(--ink);
  color: var(--on-dark);
  padding: 92px 0 84px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(700px 500px at 60% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero .container { position: relative; }
.hero .eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 1px; font-weight: 600;
  color: var(--cyan); border: 1px solid rgba(46,168,213,0.4);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 22px;
  background: rgba(46,168,213,0.08);
}
.hero h1 { font-size: clamp(30px, 4.6vw, 52px); line-height: 1.2; color: #fff; font-weight: 800; max-width: 820px; }
.hero h1 .hl { color: var(--cyan); }
.hero .sub { margin-top: 20px; max-width: 680px; font-size: 17px; color: var(--on-dark-muted); }
.hero .cta-row { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 12px 26px; border-radius: 10px;
  font-weight: 600; font-size: 15px; transition: transform 0.12s, box-shadow 0.12s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--cyan), var(--blue)); color: #fff; box-shadow: 0 8px 24px rgba(30,94,220,0.35); }
.btn-ghost { border: 1px solid rgba(255,255,255,0.3); color: #fff; }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-dark { background: var(--ink); color: #fff; }

/* hero stats strip */
.stat-strip {
  margin-top: 56px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.stat-strip .stat {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); padding: 20px 22px;
}
.stat .num { font-size: 32px; font-weight: 800; color: #fff; }
.stat .num small { font-size: 18px; font-weight: 700; }
.stat .lbl { font-size: 13.5px; color: var(--on-dark-muted); margin-top: 4px; }

/* ---------- Sections (light) ---------- */
.section { padding: 76px 0; }
.section.alt { background: #fff; }
.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head .kicker { color: var(--blue); font-weight: 700; font-size: 13.5px; letter-spacing: 1.5px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(24px, 3vw, 34px); margin-top: 8px; font-weight: 800; color: var(--ink); }
.section-head p { margin-top: 12px; color: var(--muted); font-size: 16px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* card grid */
.grid { display: grid; gap: 22px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); transition: transform 0.15s, box-shadow 0.15s;
}
a.card { color: var(--text); display: block; }
.card:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(11,18,32,0.12); }
.card .icon {
  width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 22px; background: linear-gradient(135deg, rgba(46,168,213,0.15), rgba(30,94,220,0.15));
  color: var(--blue); margin-bottom: 16px;
}
.card h3 { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.card p { font-size: 14.5px; color: var(--muted); }
.card .more { display: inline-block; margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--blue); }
.card .tag {
  float: right; font-size: 11.5px; font-weight: 700; color: var(--cyan);
  border: 1px solid rgba(46,168,213,0.45); padding: 2px 9px; border-radius: 999px;
}

/* numbered feature rows */
.feature-row { display: flex; gap: 18px; align-items: flex-start; }
.feature-row .n {
  flex: 0 0 34px; height: 34px; border-radius: 50%; background: var(--blue); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 15px;
}
.feature-row h4 { font-size: 16.5px; color: var(--ink); margin-bottom: 4px; }
.feature-row p { color: var(--muted); font-size: 14.5px; }

/* comparison / advantage table */
.adv-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.adv-table th {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue)); color: #fff;
  text-align: left; padding: 14px 18px; font-size: 14.5px;
}
.adv-table td { padding: 15px 18px; border-top: 1px solid var(--line); font-size: 14.5px; vertical-align: top; }
.adv-table td:first-child { font-weight: 700; color: var(--ink); white-space: nowrap; }
.adv-table .val { color: var(--blue); font-weight: 600; }
.table-scroll { overflow-x: auto; border-radius: var(--radius); }

/* dark band (testimonial / cta) */
.band {
  background:
    radial-gradient(600px 300px at 85% 20%, rgba(30,94,220,0.3), transparent 60%),
    var(--ink);
  color: var(--on-dark); padding: 70px 0;
}
.band blockquote { font-size: clamp(18px, 2.4vw, 24px); line-height: 1.6; color: #fff; max-width: 860px; font-weight: 500; }
.band blockquote::before { content: "“"; color: var(--cyan); font-size: 1.4em; }
.band blockquote::after { content: "”"; color: var(--cyan); font-size: 1.4em; }
.band .who { margin-top: 18px; color: var(--on-dark-muted); font-size: 15px; }
.band h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); }
.band .sub { color: var(--on-dark-muted); margin-top: 12px; max-width: 640px; }

/* partner strip */
.partners { display: flex; align-items: center; gap: 40px; flex-wrap: wrap; }
.partners .p-item { font-size: 22px; font-weight: 800; color: var(--ink); opacity: 0.75; letter-spacing: 0.5px; }
.partners .p-item small { display: block; font-size: 12px; font-weight: 500; color: var(--muted); letter-spacing: 0; }

/* workflow / steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px;
  position: relative; counter-increment: step;
}
.step::before {
  content: counter(step, decimal-leading-zero);
  font-size: 13px; font-weight: 800; color: var(--cyan); letter-spacing: 1px;
}
.step h4 { margin-top: 8px; font-size: 16px; color: var(--ink); }
.step p { margin-top: 6px; font-size: 13.5px; color: var(--muted); }

/* page hero (subpages) */
.page-hero { padding: 72px 0 64px; }
.page-hero .crumb { font-size: 13.5px; color: var(--on-dark-muted); margin-bottom: 16px; }
.page-hero .crumb a { color: var(--cyan); }

/* stat callouts inline */
.big-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.big-stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; text-align: center; box-shadow: var(--shadow); }
.big-stat .num { font-size: 44px; font-weight: 800; color: var(--blue); line-height: 1.1; }
.big-stat .num small { font-size: 22px; }
.big-stat .lbl { margin-top: 8px; color: var(--muted); font-size: 14.5px; }

/* pain point cards */
.pain { border-left: none; }
.pain h3 { color: var(--ink); }

/* contact */
.contact-wrap { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 36px; align-items: start; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.form-card label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin: 16px 0 6px; }
.form-card label:first-of-type { margin-top: 0; }
.form-card input, .form-card select, .form-card textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--line); border-radius: 9px;
  font-size: 14.5px; font-family: inherit; background: var(--bg); color: var(--text);
}
.form-card input:focus, .form-card select:focus, .form-card textarea:focus {
  outline: 2px solid rgba(30,94,220,0.35); border-color: var(--blue);
}
.form-card .btn { margin-top: 22px; border: none; cursor: pointer; width: 100%; font-family: inherit; }
.contact-side .card { margin-bottom: 20px; }
.qr-box {
  width: 160px; height: 160px; border: 2px dashed var(--line); border-radius: 12px;
  display: flex; align-items: center; justify-content: center; color: var(--muted);
  font-size: 13px; text-align: center; padding: 12px; background: var(--bg);
}

/* footer */
.site-footer { background: var(--ink); color: var(--on-dark-muted); padding: 54px 0 34px; font-size: 14px; }
.site-footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 36px; }
.site-footer h5 { color: #fff; font-size: 14.5px; margin-bottom: 14px; }
.site-footer a { display: block; color: var(--on-dark-muted); margin-bottom: 9px; }
.site-footer a:hover { color: var(--cyan); }
.site-footer .legal { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 22px; font-size: 13px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- imagery ---------- */
.brand img { height: 72px; width: auto; }

.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.hero-grid.wide { grid-template-columns: 0.82fr 1.18fr; }
.hero-media img { width: 100%; height: auto; }
.hero-media img[src*="agent-computer-branded"] { width: 34%; margin: 0 auto; filter: drop-shadow(0 18px 30px rgba(0,0,0,0.45)); }
.hero-media.shot img { border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.12); box-shadow: 0 24px 60px rgba(0,0,0,0.5); }

.card .thumb {
  margin: -26px -26px 18px; border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden; aspect-ratio: 16 / 9; background: var(--ink-2);
}
.card .thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.card .thumb.fit { background: #fff; }
.card .thumb.fit img { object-fit: contain; }

.img-panel { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: #fff; }
.img-panel img { width: 100%; height: auto; }
.img-panel figcaption { padding: 12px 18px; font-size: 13.5px; color: var(--muted); border-top: 1px solid var(--line); }
.band .img-panel, .section .img-panel.on-dark { border-color: rgba(255,255,255,0.12); background: var(--ink-2); }
.band .img-panel figcaption { border-color: rgba(255,255,255,0.1); color: var(--on-dark-muted); }

.media-row { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.media-row.rev > .img-panel { order: -1; }

/* industry events — old-site style: big image, heading + text below */
.event { display: block; color: var(--text); }
.event .img-panel { margin-bottom: 16px; }
.event .img-panel img { width: 100%; height: auto; display: block; }
.event h3 { font-size: 18px; font-weight: 800; color: var(--ink); letter-spacing: 0.5px; margin-bottom: 8px; text-transform: uppercase; }
.event p { font-size: 14.5px; color: var(--muted); }
.event:hover h3 { color: var(--blue); }

/* horizontal scroller (滚动) */
.h-scroll { display: flex; gap: 16px; overflow-x: auto; padding-bottom: 12px; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
.h-scroll figure { flex: 0 0 auto; max-width: 86vw; scroll-snap-align: start; margin: 0; }
.h-scroll figure img { height: 300px; width: auto; max-width: 86vw; object-fit: contain; display: block; }

/* photo gallery */
.photo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.photo-grid .img-panel img { aspect-ratio: 4 / 3; object-fit: cover; }
@media (max-width: 920px) { .photo-grid { grid-template-columns: repeat(2, 1fr); } }

/* blog */
.post-body { max-width: 780px; }
.post-body p { margin-bottom: 18px; font-size: 16px; color: var(--text); }
.post-body .post-h { font-size: 22px; font-weight: 800; color: var(--ink); margin: 34px 0 14px; }
.post-body .post-img { margin: 28px 0; }
.post-body .post-img img { width: auto; max-width: 100%; margin: 0 auto; }
.blog-grid .card h3 { font-size: 16.5px; line-height: 1.45; margin-top: 6px; }
.blog-grid .card .thumb { aspect-ratio: auto; }
.blog-grid .card .thumb img { height: auto; object-fit: contain; }
.blog-grid .card .news-date { margin-bottom: 0; }

/* news / videos — native <video> with poster, like envixionai.com */
.news-list { display: flex; flex-direction: column; gap: 56px; }
.video-panel { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: #000; }
.video-panel video { width: 100%; display: block; object-fit: contain; max-height: 420px; }
.news-date { font-size: 13px; font-weight: 700; letter-spacing: 1.2px; color: var(--cyan); text-transform: uppercase; margin-bottom: 8px; }
.news-item h2 { font-size: clamp(20px, 2.4vw, 27px); color: var(--ink); margin-bottom: 10px; font-weight: 800; }
.news-item p { color: var(--muted); font-size: 15.5px; }

.logo-strip { display: flex; align-items: center; gap: 44px; flex-wrap: wrap; }
.logo-strip img { max-height: 46px; width: auto; }
.logo-strip img.tall { max-height: 76px; }
.logo-strip .dark-chip { background: var(--ink); padding: 10px 20px; border-radius: 10px; }

@media (max-width: 920px) {
  .hero-grid, .hero-grid.wide { grid-template-columns: 1fr; }
  .media-row { grid-template-columns: 1fr; }
  .media-row.rev > .img-panel { order: 0; }
}

/* reveal animation */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.in { opacity: 1; transform: none; }

/* utility */
.mt-1 { margin-top: 12px; } .mt-2 { margin-top: 24px; } .mt-3 { margin-top: 40px; }
.note { font-size: 13px; color: var(--muted); }

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .big-stats { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .site-footer .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .menu-btn { display: block; }
  .nav {
    display: none; position: absolute; top: 88px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 10px 0;
  }
  .nav.open { display: flex; }
  .nav > a, .nav .dropdown { width: 100%; }
  .nav > a, .nav .dropdown > a { display: block; padding: 12px 24px; }
  .nav .dropdown-menu { display: block; position: static; border: none; box-shadow: none; background: transparent; padding: 0 0 6px; }
  .nav .dropdown-menu a { padding: 8px 40px; }
}