/* =========================================================
   广东净芯 · 企业官网 Design System
   Modern Industrial · 深紫 / 工业蓝 / 白
   ========================================================= */

:root {
  /* Brand palette */
  --c-purple-900: #2a1a4a;
  --c-purple-700: #3d2470;
  --c-purple-500: #5b3fa3;
  --c-purple-400: #7a5bc8;
  --c-blue-900: #14283f;
  --c-blue-700: #1e3d5f;
  --c-blue-500: #2c6e9e;
  --c-blue-400: #3e8bbf;

  --c-white: #ffffff;
  --c-bg: #f5f6f8;
  --c-bg-soft: #eceff3;
  --c-ink: #1c2330;
  --c-muted: #66707e;
  --c-line: #e2e6ec;

  --grad-brand: linear-gradient(120deg, var(--c-purple-700) 0%, var(--c-blue-700) 100%);
  --grad-brand-soft: linear-gradient(120deg, rgba(91,63,163,0.08) 0%, rgba(44,110,158,0.08) 100%);

  /* Type scale */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "微软雅黑", sans-serif;

  /* Layout */
  --maxw: 1280px;
  --nav-h: 72px;

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-sm: 0 1px 3px rgba(20, 40, 63, 0.08);
  --shadow-md: 0 10px 30px rgba(20, 40, 63, 0.10);
  --shadow-lg: 0 24px 60px rgba(20, 40, 63, 0.16);
}

/* ----------------------- Reset ----------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--c-ink);
  background: var(--c-white);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }

/* ----------------------- Helpers ----------------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
}
.section { padding: 96px 0; }
.section--soft { background: var(--c-bg); }
.section--grad { background: var(--grad-brand); color: #fff; }
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-purple-500);
  margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(28px, 4vw, 42px); }
.section-head p { margin-top: 16px; color: var(--c-muted); font-size: 17px; }
.section--grad .section-head p { color: rgba(255,255,255,0.82); }
.section--grad .eyebrow { color: #cbb8f2; }

/* ----------------------- Buttons ----------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--c-purple-700); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--c-purple-500); box-shadow: var(--shadow-md); }
.btn--blue { background: var(--c-blue-700); color: #fff; }
.btn--blue:hover { background: var(--c-blue-500); }
.btn--ghost { background: transparent; border-color: rgba(255,255,255,0.5); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,0.12); }
.btn--outline { background: #fff; border-color: var(--c-line); color: var(--c-ink); }
.btn--outline:hover { border-color: var(--c-purple-400); color: var(--c-purple-700); }

/* ----------------------- Header / Nav ----------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  min-height: var(--nav-h);
  z-index: 1100;
  background: rgba(255,255,255,0.88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow .25s, background .25s;
  padding-top: env(safe-area-inset-top);
}
.site-header.is-scrolled { box-shadow: var(--shadow-sm); }
.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 19px; }
.brand__mark {
  width: 38px; height: 38px; border-radius: 9px;
  background: var(--grad-brand);
  display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 18px;
  box-shadow: var(--shadow-sm);
}
.brand__name b { color: var(--c-purple-700); }
.brand__name span { display: block; font-size: 11px; font-weight: 600; letter-spacing: 0.16em; color: var(--c-muted); }

/* Logo image (replaces text mark+name). Wide horizontal lockup: size by height, keep ratio. */
.brand__logo { height: 32px; width: auto; display: block; }
/* Footer has dark-purple background → invert logo to white so it pops */
.footer__brand .brand__logo {
  height: 38px;
  filter: brightness(0) invert(1);
}

.nav__links { display: flex; align-items: center; gap: 6px; }
.nav__links a {
  padding: 9px 16px;
  border-radius: 7px;
  font-weight: 600;
  font-size: 15px;
  color: var(--c-ink);
  transition: background .2s, color .2s;
}
.nav__links a:hover { background: var(--c-bg-soft); color: var(--c-purple-700); }
.nav__links a.is-active { background: var(--grad-brand); color: #fff; }
.nav__cta { margin-left: 10px; }

.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--c-line);
  border-radius: 8px;
  background: #fff;
  position: relative;
}
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  content: ""; position: absolute; left: 12px; width: 20px; height: 2px;
  background: var(--c-ink); transition: transform .25s, opacity .2s;
}
.nav__toggle span { top: 21px; }
.nav__toggle span::before { top: -7px; }
.nav__toggle span::after { top: 7px; }

/* ----------------------- Hero Carousel ----------------------- */
.hero { margin-top: calc(var(--nav-h) + env(safe-area-inset-top)); position: relative; }
.hero__track { position: relative; height: clamp(460px, 64vh, 640px); overflow: hidden; }
.hero__slide {
  position: absolute; inset: 0;
  opacity: 0; visibility: hidden;
  transition: opacity .8s var(--ease);
  display: flex; align-items: center;
  background-size: cover !important; background-position: center !important; background-repeat: no-repeat !important;
}
.hero__slide.is-active { opacity: 1; visibility: visible; }
.hero__overlay { position: absolute; inset: 0; background: linear-gradient(105deg, rgba(20,40,63,0.60) 0%, rgba(20,40,63,0.28) 50%, rgba(20,40,63,0.10) 100%); }
.hero__content { position: relative; z-index: 2; max-width: 640px; color: #fff; text-shadow: 0 2px 16px rgba(0,0,0,0.55); }
.hero__content .eyebrow { color: #cbb8f2; }
.hero__content h1 { font-size: clamp(34px, 5.4vw, 60px); line-height: 1.08; }
.hero__content p { margin-top: 20px; font-size: 18px; color: rgba(255,255,255,0.86); max-width: 520px; }
.hero__actions { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero__dots { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 3; display: flex; gap: 10px; }
.hero__dot { width: 11px; height: 11px; border-radius: 50%; border: none; background: rgba(255,255,255,0.45); transition: background .2s, width .2s; }
.hero__dot.is-active { background: #fff; width: 30px; border-radius: 6px; }
.hero__arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 48px; height: 48px; border-radius: 50%; border: none;
  background: rgba(255,255,255,0.18); color: #fff; font-size: 22px;
  display: grid; place-items: center; backdrop-filter: blur(4px);
  transition: background .2s;
}
.hero__arrow:hover { background: rgba(255,255,255,0.34); }
.hero__arrow--prev { left: 22px; }
.hero__arrow--next { right: 22px; }

/* ----------------------- Stat bar ----------------------- */
.stats {
  background: var(--c-blue-900);
  color: #fff;
  padding: 48px 0;
}
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat__num { font-size: clamp(34px, 4.4vw, 52px); font-weight: 800; line-height: 1; background: linear-gradient(120deg,#b9a3ec,#7ec3ec); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat__label { margin-top: 10px; font-size: 15px; color: rgba(255,255,255,0.78); letter-spacing: 0.02em; }

/* ----------------------- Cards ----------------------- */
.card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 14px;
  padding: 30px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.grid { display: grid; gap: 24px; }
.grid > * { min-width: 0; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.feature-card .feature-card__icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: var(--grad-brand-soft);
  display: grid; place-items: center; margin-bottom: 18px;
  color: var(--c-purple-700);
}
/* ===== 三张自定义图标：统一用 <img> 展示，颜色已烘焙为 #7A20C0（透明底 PNG）===== */
.icon-quality,
.icon-commercial,
.icon-supply-chain {
  display: block;
  width: 50px; height: 50px;
  margin-bottom: 24px; /* 50 + 24 = 74，三张卡片标题基线对齐 */
  object-fit: contain;
}
.feature-card h3 { font-size: 20px; }
.feature-card p { margin-top: 10px; color: var(--c-muted); }

/* ---- 封面卡片：图片完整显示于顶部，文字块在下方正常排列 ---- */
.feature-card--cover {
  position: relative;
  overflow: hidden;
  padding: 0 !important;
}
.feature-card--cover > img {
  display: block;
  width: 100%;
  height: 240px;
  object-fit: cover;
  object-position: center;
  transition: transform .35s var(--ease);
}
.feature-card--cover .feature-card__body {
  padding: 22px 24px 26px;
  background: #fff;
}
.feature-card--cover:hover > img {
  transform: scale(1.03);
}

/* ---- 底图卡片：背景图铺满，文字浮于上方（用于结构优势 PP-R 外层等）---- */
.feature-card--bg-img {
  background-size: cover !important;
  background-position: center !important;
  background-repeat: no-repeat !important;
  position: relative;
}
.feature-card--bg-img::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(255,255,255,0.78); /* 半透明白底保证文字可读 */
  border-radius: inherit;
  z-index: 0;
}
.feature-card--bg-img > * { position: relative; z-index: 1; }

/* Pipe product cards */
.pipe-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: 14px;
  overflow: hidden; transition: transform .25s var(--ease), box-shadow .25s;
}
.pipe-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.pipe-card__thumb {
  height: 150px; display: grid; place-items: center; position: relative;
  background: var(--grad-brand-soft); color: var(--c-purple-700);
  border-bottom: 1px solid var(--c-line); overflow: hidden;
}
.pipe-card__thumb.has-img > svg { display: none; }
.pipe-card__thumb img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center;
}
/* 自然比例图片（关于页检验设备图，按原图宽高比显示，不做裁切） */
.pipe-card__thumb--natural { height: auto !important; aspect-ratio: auto !important; }
.pipe-card__thumb--natural img {
  position: static; width: 100%; height: auto;
  object-fit: contain; display: block;
}
/* 高级放大镜光标（玻璃质感 + 品牌紫）+ hover 图片轻微推近 */
.pipe-card__thumb.has-img {
  cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="44" height="44" viewBox="0 0 44 44"><defs><linearGradient id="g" x1="0" y1="0" x2="1" y2="1"><stop offset="0" stop-color="%23ffffff" stop-opacity="0.85"/><stop offset="1" stop-color="%23e9d5ff" stop-opacity="0.55"/></linearGradient></defs><g fill="none" stroke="%237c3aed" stroke-width="2.6" stroke-linecap="round"><circle cx="16" cy="16" r="10.5" fill="url(%23g)"/><line x1="23.6" y1="23.6" x2="33" y2="33"/></g><circle cx="16" cy="16" r="10.5" fill="none" stroke="%23ffffff" stroke-width="1.3" opacity="0.9"/></svg>') 16 16, zoom-in;
}
@media (hover: hover) {
  .pipe-card__thumb.has-img img { transition: transform .5s var(--ease); }
  .pipe-card:hover .pipe-card__thumb.has-img img { transform: scale(1.12); }
}
.pipe-card__body { padding: 18px 20px 22px; }
.pipe-card__body h4 { font-size: 17px; }
.pipe-card__body p { margin-top: 6px; font-size: 13px; color: var(--c-muted); }
.pipe-card__tag {
  display: inline-block; margin-top: 12px; font-size: 12px; font-weight: 600;
  color: var(--c-blue-700); background: rgba(44,110,158,0.1);
  padding: 4px 10px; border-radius: 20px;
}

/* ----------------------- Logo / partner strip ----------------------- */
.logo-strip { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.logo-cell {
  height: 92px; border: 1px dashed var(--c-line); border-radius: 12px;
  display: grid; place-items: center; color: var(--c-muted);
  font-weight: 700; font-size: 14px; background: #fff; letter-spacing: 0.02em;
}
.logo-cell:hover { border-color: var(--c-purple-400); color: var(--c-purple-700); }

/* ----------------------- Tables ----------------------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-line); border-radius: 14px; }
table.data { width: 100%; border-collapse: collapse; min-width: 680px; }
table.data th, table.data td { padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--c-line); font-size: 15px; }
table.data thead th { background: var(--c-blue-900); color: #fff; font-weight: 700; position: sticky; top: 0; }
table.data tbody tr:nth-child(even) { background: var(--c-bg-soft); }
table.data tbody tr:hover { background: var(--grad-brand-soft); }
table.data td:first-child { font-weight: 600; }

/* ----------------------- 实验报告展示墙（3D 前后叠放证书墙 / Cover Flow） ----------------------- */
.cert-carousel {
  position: relative;
  width: 100%;
  height: 460px;
  perspective: 1400px;
  overflow: visible;
  cursor: default;
}
.cert-carousel__stage {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0; height: 0;
  transform-style: preserve-3d;
  will-change: transform;
}
.cert-frame {
  position: absolute;
  width: 220px;
  height: 300px;
  left: -110px;          /* 居中自身 */
  top: -150px;
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
  cursor: pointer;
  will-change: transform, opacity;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  /* 相框式阴影 + 白边 */
  box-shadow:
    0 10px 34px rgba(0,0,0,0.22),
    0 0 0 1px rgba(0,0,0,0.06),
    inset 0 0 0 8px rgba(255,255,255,0.65);
}
.cert-frame img {
  display: block;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
}
/* Reflective floor — 展示台 */
.cert-carousel__floor {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  max-width: 800px;
  height: 50px;
  background: linear-gradient(180deg,
    rgba(160,155,145,0.30) 0%,
    rgba(160,155,145,0.10) 40%,
    transparent 100%
  );
  border-radius: 50%;
  filter: blur(10px);
  pointer-events: none;
}

@media (max-width: 768px) {
  .cert-carousel { height: 360px; perspective: 1000px; }
  .cert-frame { width: 150px; height: 205px; left: -75px; top: -102px; }
}

/* ----------------------- FAQ ----------------------- */
.faq { max-width: 840px; margin: 0 auto; }
.faq__item { border: 1px solid var(--c-line); border-radius: 12px; margin-bottom: 14px; background: #fff; overflow: hidden; }
.faq__q {
  width: 100%; text-align: left; background: none; border: none;
  padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--c-ink);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq__q .ico { transition: transform .25s var(--ease); color: var(--c-purple-700); flex: none; }
.faq__item.is-open .faq__q .ico { transform: rotate(45deg); }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .3s var(--ease); }
.faq__a p { padding: 0 24px 20px; color: var(--c-muted); }

/* ----------------------- Forms ----------------------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 7px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--c-line); border-radius: 9px;
  font-family: inherit; font-size: 15px; background: #fff; color: var(--c-ink);
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--c-purple-400); box-shadow: 0 0 0 3px rgba(122,91,200,0.16);
}
.field textarea { min-height: 130px; resize: vertical; }
.field--full { grid-column: 1 / -1; }
.form-note { font-size: 13px; color: var(--c-muted); margin-top: 12px; }

/* ----------------------- Info cards (contact) ----------------------- */
.info-card { display: flex; gap: 16px; align-items: flex-start; padding: 18px 0; border-bottom: 1px solid var(--c-line); }
.info-card:last-child { border-bottom: none; }
.info-card__icon { width: 46px; height: 46px; flex: none; border-radius: 12px; background: var(--grad-brand-soft); color: var(--c-purple-700); display: grid; place-items: center; }
.info-card h4 { font-size: 15px; color: var(--c-muted); font-weight: 600; }
.info-card p { font-size: 17px; font-weight: 600; }

/* ----------------------- Map placeholder ----------------------- */
.map {
  height: 380px; border-radius: 16px; overflow: hidden; position: relative;
  background:
    linear-gradient(rgba(44,110,158,0.06), rgba(91,63,163,0.06)),
    repeating-linear-gradient(0deg, #eef1f5 0 39px, #e5e9ef 39px 40px),
    repeating-linear-gradient(90deg, #eef1f5 0 39px, #e5e9ef 39px 40px);
  border: 1px solid var(--c-line);
}
.map__pin {
  position: absolute; left: 50%; top: 46%; transform: translate(-50%,-100%);
  width: 30px; height: 30px; border-radius: 50% 50% 50% 0; background: var(--c-purple-700);
  rotate: -45deg; box-shadow: 0 6px 16px rgba(42,26,74,0.4);
}
.map__pin::after { content:""; position:absolute; inset:9px; background:#fff; border-radius:50%; }
.map__label {
  position: absolute; left: 50%; top: 46%; transform: translate(-50%, 14px);
  background: #fff; border: 1px solid var(--c-line); padding: 8px 14px; border-radius: 10px;
  font-size: 13px; font-weight: 600; box-shadow: var(--shadow-sm); white-space: nowrap;
}

/* 真实地图容器（Leaflet） */
.realmap {
  height: 380px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-sm);
  background: #e9edf2;
}
.realmap .leaflet-popup-content { font-size: 13px; line-height: 1.6; }
.realmap .leaflet-popup-content b { color: #2a1a4a; }

/* ----------------------- QR / service panel ----------------------- */
.qr {
  width: 130px; height: 130px; border-radius: 12px; background: #fff;
  border: 1px solid var(--c-line); display: grid; place-items: center;
  background-image:
    linear-gradient(45deg, #1c2330 25%, transparent 25%, transparent 75%, #1c2330 75%),
    linear-gradient(45deg, #1c2330 25%, transparent 25%, transparent 75%, #1c2330 75%);
  background-size: 22px 22px; background-position: 0 0, 11px 11px;
  position: relative;
}
.qr::after { content: "QR"; position: absolute; inset: 0; display: grid; place-items: center; font-weight: 800; color: #fff; mix-blend-mode: difference; font-size: 22px; }

/* ----------------------- Process steps ----------------------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; counter-reset: step; }
.step { padding: 30px; position: relative; border: 1px solid var(--c-line); margin-left: -1px; background: #fff; }
.step__no { position: relative; width: 50px; height: 50px; border-radius: 50%; background: var(--grad-brand); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 20px; box-shadow: 0 8px 18px rgba(124,58,237,0.30); }
.step__no::after { content: ""; position: absolute; inset: -6px; border-radius: 50%; border: 1px solid rgba(124,58,237,0.25); }
.step h4 { margin-top: 16px; font-size: 18px; }
.step p { margin-top: 8px; color: var(--c-muted); font-size: 14px; }
.step__img {
  display: block;
  width: 100%;
  height: 160px;
  object-fit: cover;
  object-position: center;
  border-radius: 10px;
  margin-top: 16px;
}
.step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 55px;
  left: 92px;
  right: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--grad-brand), rgba(124,58,237,0.06));
  z-index: 0;
}

/* ----------------------- Footer ----------------------- */
.site-footer { background: var(--c-purple-900); color: rgba(255,255,255,0.78); padding: 64px 0 0; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; }
.site-footer h4 { color: #fff; font-size: 15px; letter-spacing: 0.04em; margin-bottom: 18px; }
.footer__brand .brand { color: #fff; margin-bottom: 14px; }
.footer__brand p { font-size: 14px; max-width: 320px; }
.footer__links a { display: block; padding: 7px 0; color: rgba(255,255,255,0.72); font-size: 14px; transition: color .2s; }
.footer__links a:hover { color: #fff; }
.footer__contact li { display: flex; gap: 10px; padding: 7px 0; font-size: 14px; }
.footer__contact .ico { color: #b9a3ec; flex: none; }
.footer__bottom {
  margin-top: 48px; border-top: 1px solid rgba(255,255,255,0.12);
  padding: 22px 0; font-size: 13px; color: rgba(255,255,255,0.6);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}

/* ----------------------- Reveal animation ----------------------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
/* ===== AES 应用场景：6 张实景竖图无缝并列 + 紫色悬停遮罩 ===== */
.scene-mosaic {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;                       /* 无缝隙，整行铺满视口宽度 */
  width: 100%;                  /* 全宽撑满整个网页 */
  margin-top: 0;
  overflow: hidden;             /* 裁切，保持整体无缝 */
}
.scene-tile {
  position: relative;
  aspect-ratio: 3 / 5;          /* 高:宽 = 5:3 */
  background-size: cover;
  background-position: center;
  overflow: hidden;
  cursor: pointer;
  outline: none;
}
.scene-tile__label {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 18px 14px 14px;
  color: #fff; font-size: 15px; font-weight: 700; letter-spacing: .02em;
  background: linear-gradient(to top, rgba(15, 8, 30, .72), rgba(15, 8, 30, 0));
  transition: opacity .3s ease;
  pointer-events: none;
}
.scene-tile__overlay {
  position: absolute; inset: 0;
  background: rgba(122, 32, 192, .82);   /* #7A20C0 紫色色块遮罩 */
  color: #fff;
  opacity: 0;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 20px 18px;
  transform: scale(1.04);
  transition: opacity .35s ease, transform .35s ease;
  pointer-events: none;
}
.scene-tile:hover .scene-tile__overlay,
.scene-tile:focus-visible .scene-tile__overlay { opacity: 1; transform: scale(1); }
.scene-tile:hover .scene-tile__label,
.scene-tile:focus-visible .scene-tile__label { opacity: 0; }
.scene-tile__overlay h3 { margin: 0 0 8px; font-size: 16px; font-weight: 800; }
.scene-tile__overlay p { margin: 0; font-size: 13px; line-height: 1.55; opacity: .92; }

/* 平板 3 列，手机 2 列 */
@media (max-width: 1024px) {
  .scene-mosaic { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 560px) {
  .scene-mosaic { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ----------------------- Responsive ----------------------- */
/* Drawer menu backdrop + body scroll lock (only active ≤900px) */
body.nav-open { overflow: hidden; }
.nav-overlay {
  position: fixed; inset: 0;
  background: rgba(15,18,30,0.46);
  opacity: 0; visibility: hidden;
  transition: opacity .3s var(--ease), visibility .3s;
  z-index: 1040;
}
.nav-overlay.is-open { opacity: 1; visibility: visible; }

/* Animated hamburger → close (X) */
.nav__toggle.is-active span { background: transparent; }
.nav__toggle.is-active span::before { top: 0; transform: rotate(45deg); }
.nav__toggle.is-active span::after { top: 0; transform: rotate(-45deg); }

@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .logo-strip { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

/* ---- Off-canvas drawer nav (tablet portrait + phone) ---- */
@media (max-width: 900px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh; height: 100dvh;
    width: min(82vw, 320px);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: calc(var(--nav-h) + env(safe-area-inset-top) + 14px) 16px calc(24px + env(safe-area-inset-bottom));
    background: #fff;
    box-shadow: -24px 0 60px rgba(20,40,63,0.20);
    transform: translateX(100%);
    transition: transform .32s var(--ease);
    z-index: 1050;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav__links.is-open { transform: translateX(0); }
  .nav__links a { padding: 15px 16px; font-size: 16px; border-radius: 10px; }
  .nav__links a.is-active { color: #fff; }
  .nav__cta { margin: 14px 0 0; text-align: center; justify-content: center; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .step:not(:last-child)::after { display: none; }
  .grid--3, .grid--2, .steps { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
  .form-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .hero__arrow { display: none; }
}

@media (max-width: 480px) {
  .grid--4 { grid-template-columns: 1fr; }
  .logo-strip { grid-template-columns: repeat(2, 1fr); }
  .stats__grid { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .card { padding: 24px; }
  .feature-card--cover .feature-card__body { padding: 18px 18px 22px; }
  .contact-cs { flex-direction: column; text-align: center; gap: 16px; }
  .contact-cs img { width: 96px !important; height: 96px !important; }
}

/* ---- Short landscape phones: keep hero compact ---- */
@media (max-height: 480px) and (orientation: landscape) {
  .hero__track { height: 80vh; min-height: 300px; }
  .hero__content h1 { font-size: clamp(26px, 5vw, 40px); }
  .hero__content p { margin-top: 12px; font-size: 16px; }
  .hero__actions { margin-top: 18px; }
  .nav__links { height: 100vh; }
}

/* ----------------------- Lightbox ----------------------- */
.lightbox {
  position: fixed; inset: 0; z-index: 9999;
  display: none; align-items: center; justify-content: center;
  background: rgba(15, 18, 30, 0.92);
  opacity: 0; transition: opacity .25s var(--ease, ease);
  padding: 6vh 6vw;
  backdrop-filter: blur(4px);
}
.lightbox.is-open { display: flex; opacity: 1; }
.lightbox__img {
  max-width: 88vw; max-height: 84vh;
  object-fit: contain; border-radius: 12px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .55);
  transform: scale(.94); transition: transform .28s var(--ease, ease);
  cursor: default;
}
.lightbox.is-open .lightbox__img { transform: scale(1); }
.lightbox__btn {
  position: absolute; width: 50px; height: 50px;
  border: none; border-radius: 50%;
  background: rgba(255, 255, 255, .12); color: #fff;
  font-size: 22px; line-height: 1; cursor: pointer;
  display: grid; place-items: center;
  transition: background .2s var(--ease, ease), transform .2s var(--ease, ease);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}
.lightbox__btn:hover { background: rgba(255, 255, 255, .28); transform: scale(1.08); }
.lightbox__close { top: 24px; right: 24px; font-size: 28px; }
.lightbox__prev { left: 24px; top: 50%; transform: translateY(-50%); }
.lightbox__next { right: 24px; top: 50%; transform: translateY(-50%); }
.lightbox__prev:hover, .lightbox__next:hover { transform: translateY(-50%) scale(1.08); }
.lightbox__caption {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  color: rgba(255, 255, 255, .92); font-size: 14px; letter-spacing: .02em;
  background: rgba(0, 0, 0, .4); padding: 7px 18px; border-radius: 22px;
  max-width: 80vw; text-align: center;
}
.lightbox__counter {
  position: absolute; top: 28px; left: 28px;
  color: rgba(255, 255, 255, .8); font-size: 13px;
}