:root{
  --about-bg: var(--bg, #f5f5f7);
  --about-card: var(--card, #ffffff);
  --about-text: var(--text, #222);
  --about-muted: var(--muted, #7d7f89);
  --about-border: var(--border, #e6e7ee);
  --about-accent: var(--accent, #c99a5b);

  --about-radius: 20px;
  --about-radius-lg: 28px;
  --about-shadow: 0 18px 45px rgba(15,23,42,.10);
  --about-shadow-soft: 0 10px 30px rgba(15,23,42,.08);
}

main{ background: var(--about-bg); }

/* =======================
   HERO
======================= */
.about-hero{
  padding: 72px 0 30px;
  position: relative;
  overflow: hidden;
}

.about-hero::before{
  content:"";
  position:absolute;
  inset:-220px -160px auto -160px;
  height: 520px;
  background:
    radial-gradient(closest-side, rgba(201,154,91,.18), transparent 65%),
    radial-gradient(closest-side, rgba(17,24,39,.08), transparent 70%);
  filter: blur(2px);
  pointer-events:none;
}

.about-hero-grid{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 42px;
  align-items: center;
}

.about-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size: 13px;
  letter-spacing:.12em;
  text-transform: uppercase;
  color: var(--about-muted);
}

.about-eyebrow::before{
  content:"";
  width: 26px;
  height: 1px;
  background: var(--about-border);
}

.about-title{
  margin-top: 12px;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--about-text);
}

.about-subtitle{
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--about-muted);
  max-width: 52ch;
}

.about-hero-actions{
  margin-top: 22px;
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* proof bar */
.about-proof{
  margin-top: 22px;
  display:flex;
  gap: 14px;
  flex-wrap: wrap;
}

.proof-pill{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding: 10px 14px;
  border: 1px solid var(--about-border);
  background: rgba(255,255,255,.55);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 20px rgba(15,23,42,.06);
  font-size: 13px;
  color: var(--about-text);
}
.proof-pill span{
  color: var(--about-muted);
}

/* stats */
.about-stats{
  margin-top: 24px;
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 12px;
}

.stat{
  padding: 14px 14px;
  border: 1px solid var(--about-border);
  background: rgba(255,255,255,.65);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 22px rgba(15,23,42,.06);
}

.stat-num{
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--about-text);
}

.stat-label{
  margin-top: 6px;
  font-size: 13px;
  color: var(--about-muted);
}

/* media */
.about-hero-media{
  position: relative;
}

.about-hero-image{
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 32px;

  background-image: url("/assets/img/about/hero.jpg");
  background-size: cover;
  background-position: center;

  border: 1.5px solid rgba(201,154,91,.55); /* 品牌金 */
  box-shadow:
    0 20px 45px rgba(15,23,42,.12),
    inset 0 0 0 1px rgba(255,255,255,.25);
}



.about-hero-badges{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  position:absolute;
  left: 16px;
  bottom: 16px;
}

.badge{
  padding: 9px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: #fff;
  background: rgba(17,24,39,.55);
  border: 1px solid rgba(255,255,255,.20);
  backdrop-filter: blur(10px);
}

/* =======================
   SECTIONS
======================= */
.about-section{
  padding: 56px 0;
}

.about-section-head{
  max-width: 760px;
  margin-bottom: 22px;
}

.about-h2{
  font-size: 28px;
  letter-spacing: -0.01em;
  color: var(--about-text);
}

.about-p{
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-muted);
}

/* =======================
   CARDS
======================= */
.about-grid-3{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 16px;
  margin-top: 18px;
}

.about-card{
  padding: 22px 20px;
  border-radius: var(--about-radius);
  border: 1px solid var(--about-border);
  background: var(--about-card);
  box-shadow: var(--about-shadow-soft);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.about-card:hover{
  transform: translateY(-4px);
  box-shadow: var(--about-shadow);
  border-color: rgba(201,154,91,.45);
}

.about-card-kicker{
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--about-muted);
}

.about-h3{
  margin-top: 10px;
  font-size: 18px;
  color: var(--about-text);
  letter-spacing: -0.01em;
}

.about-link{
  display:inline-flex;
  margin-top: 14px;
  font-size: 14px;
  color: var(--about-text);
  text-decoration: none;
  position: relative;
}

.about-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-6px;
  width:100%;
  height:1px;
  background: linear-gradient(90deg, rgba(201,154,91,.9), rgba(201,154,91,0));
  transform: scaleX(.35);
  transform-origin: left;
  transition: transform .22s ease;
  opacity:.85;
}
.about-card:hover .about-link::after{ transform: scaleX(1); }

/* =======================
   SPLIT + STEPS
======================= */
.about-split{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 22px;
  align-items: start;
}

.about-steps{
  margin-top: 18px;
  padding: 18px;
  border-radius: var(--about-radius);
  background: rgba(255,255,255,.65);
  border: 1px solid var(--about-border);
  box-shadow: 0 10px 28px rgba(15,23,42,.06);
}

.step{
  display:grid;
  grid-template-columns: 16px 1fr;
  gap: 12px;
  padding: 12px 6px;
}

.step + .step{
  border-top: 1px dashed rgba(125,127,137,.25);
}

.step-dot{
  width: 10px;
  height: 10px;
  border-radius: 999px;
  margin-top: 6px;
  background: var(--about-accent);
  box-shadow: 0 0 0 4px rgba(201,154,91,.20);
}

.step-title{
  font-weight: 650;
  color: var(--about-text);
  font-size: 14px;
}

.step-text{
  margin-top: 6px;
  color: var(--about-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* side panel */
.about-panel{
  position: sticky;
  top: 92px;
  padding: 22px 20px;
  border-radius: var(--about-radius);
  background: var(--about-card);
  border: 1px solid var(--about-border);
  box-shadow: var(--about-shadow-soft);
}

.about-list{
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.about-list li{
  padding: 10px 0;
  border-top: 1px solid rgba(230,231,238,.8);
  color: var(--about-muted);
  font-size: 14px;
}
.about-list li:first-child{ border-top: none; }

.about-mini-cta{
  margin-top: 18px;
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* =======================
   GALLERY (featured + grid)
======================= */
.about-gallery{
  margin-top: 18px;
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 14px;
}

.about-gallery .g{
  border-radius: 18px;
  border: 1px solid var(--about-border);
  box-shadow: var(--about-shadow-soft);
  background-size: cover;
  background-position: center;
  transition: transform .22s ease, box-shadow .22s ease;
  min-height: 220px;
}

.about-gallery .g:hover{
  transform: translateY(-4px);
  box-shadow: var(--about-shadow);
}

.about-gallery .g:first-child{
  min-height: 454px;
}

.about-gallery .g-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
}

.about-gallery .g-grid .g{
  min-height: 220px;
}

/* =======================
   FINAL CTA
======================= */
.about-final{
  padding: 44px 0 72px;
}

.about-final-inner{
  padding: 26px 24px;
  border-radius: var(--about-radius-lg);
  border: 1px solid rgba(201,154,91,.35);
  background:
    radial-gradient(closest-side at 20% 20%, rgba(201,154,91,.18), transparent 60%),
    radial-gradient(closest-side at 80% 10%, rgba(17,24,39,.10), transparent 55%),
    #fff;
  box-shadow: var(--about-shadow);
  display:flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.about-final-actions{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* =======================
   RESPONSIVE
======================= */
@media (max-width: 980px){
  .about-hero-grid{ grid-template-columns: 1fr; }
  .about-split{ grid-template-columns: 1fr; }
  .about-panel{ position: relative; top: auto; }
  .about-grid-3{ grid-template-columns: 1fr; }
  .about-stats{ grid-template-columns: 1fr; }
  .about-gallery{ grid-template-columns: 1fr; }
}

@media (max-width: 520px){
  .about-hero{ padding-top: 58px; }
  .about-final-inner{ padding: 22px 18px; }
}

/* ================
   Scroll animation
================ */
.reveal-base{
  opacity: 0;
  transform: translateY(14px);
  filter: blur(6px);
  transition:
    opacity .7s ease,
    transform .7s ease,
    filter .7s ease;
  transition-delay: var(--d, 0s);
  will-change: opacity, transform, filter;
}

.in{
  opacity: 1 !important;
  transform: translateY(0) !important;
  filter: blur(0) !important;
}

/* A thin Apple-ish progress bar */
.scrollbar{
  position: fixed;
  left: 0;
  top: 0;
  height: 2px;
  width: 100%;
  background: var(--about-accent);
  transform-origin: left;
  transform: scaleX(0);
  z-index: 9999;
  opacity: .85;
}

/* ================
   Scale / facts
================ */
.facts-grid{
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 14px;
}

.fact-card{
  padding: 18px 16px;
  border-radius: 18px;
  background: rgba(255,255,255,.75);
  border: 1px solid var(--about-border);
  box-shadow: 0 10px 28px rgba(15,23,42,.06);
}

.fact-kicker{
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--about-muted);
}

.fact-num{
  margin-top: 10px;
  font-size: 22px;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--about-text);
}

.fact-desc{
  margin-top: 8px;
  font-size: 13px;
  color: var(--about-muted);
  line-height: 1.6;
}

.wide-gap{ gap: 28px; }

/* checklist */
.checklist{
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255,255,255,.65);
  border: 1px solid var(--about-border);
}

.check{
  position: relative;
  padding: 10px 0 10px 26px;
  color: var(--about-muted);
  font-size: 14px;
  border-top: 1px solid rgba(230,231,238,.8);
}
.check:first-child{ border-top: none; }

.check::before{
  content:"";
  position:absolute;
  left: 2px;
  top: 16px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--about-accent);
  box-shadow: 0 0 0 4px rgba(201,154,91,.18);
}

/* warehouse */
.warehouse-showcase{
  border-radius: 22px;
  border: 1px solid var(--about-border);
  background: #fff;
  box-shadow: 0 18px 45px rgba(15,23,42,.10);
  overflow: hidden;
}

.warehouse-image{
  height: 320px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.warehouse-image::after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(180deg, rgba(0,0,0,.05), rgba(0,0,0,.20));
}

.warehouse-strip{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 10px;
  padding: 12px;
  background: rgba(245,245,247,.7);
}

.ws{
  height: 120px;
  border-radius: 16px;
  background-size: cover;
  background-position: center;
  border: 1px solid rgba(230,231,238,.9);
  box-shadow: 0 10px 26px rgba(15,23,42,.06);
  transition: transform .22s ease, box-shadow .22s ease;
}
.ws:hover{
  transform: translateY(-4px);
  box-shadow: 0 18px 45px rgba(15,23,42,.10);
}

/* quality */
.quality-card{
  padding: 22px 20px;
  border-radius: 22px;
  border: 1px solid rgba(201,154,91,.25);
  background:
    radial-gradient(closest-side at 10% 10%, rgba(201,154,91,.14), transparent 55%),
    #fff;
  box-shadow: 0 18px 45px rgba(15,23,42,.10);
}

.quality-grid{
  margin-top: 14px;
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 12px;
}

.q{
  padding: 14px 14px;
  border-radius: 16px;
  border: 1px solid var(--about-border);
  background: rgba(255,255,255,.75);
}

.q-title{
  font-weight: 700;
  color: var(--about-text);
  font-size: 14px;
}
.q-desc{
  margin-top: 6px;
  color: var(--about-muted);
  font-size: 13px;
  line-height: 1.6;
}

/* sticky visual (Apple-ish) */
.sticky-visual{ align-self: start; }
.sticky-frame{
  position: sticky;
  top: 92px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--about-border);
  box-shadow: 0 18px 45px rgba(15,23,42,.10);
  background: #fff;
}

.sticky-image{
  height: 380px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.sticky-image::after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(180deg, rgba(0,0,0,.05), rgba(0,0,0,.22));
}

.sticky-caption{
  padding: 14px 16px;
  color: var(--about-muted);
  font-size: 13px;
  background: rgba(245,245,247,.75);
  border-top: 1px solid rgba(230,231,238,.9);
}

@media (max-width: 980px){
  .facts-grid{ grid-template-columns: 1fr 1fr; }
  .sticky-frame{ position: relative; top: auto; }
  .warehouse-image{ height: 260px; }
}

@media (max-width: 520px){
  .facts-grid{ grid-template-columns: 1fr; }
  .quality-grid{ grid-template-columns: 1fr; }
  .warehouse-strip{ grid-template-columns: 1fr; }
  .ws{ height: 140px; }
}

.about-video{
  padding: 70px 0;
}

.about-video-head{
  max-width: 760px;
  margin-bottom: 16px;
}

.about-video-card{
  border-radius: 22px;
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(0,0,0,0.08);
  box-shadow: 0 30px 60px rgba(15,23,42,0.16);
}

.about-video-card video{
  width: 100%;
  height: auto;
  display: block;
}

.about-video-meta{
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.about-video-chip{
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(10px);
}

.about-video-card {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9; /* 推荐 */
  border-radius: 22px;
  overflow: hidden;
  background: #000; /* 兜底 */
}

.about-video-card video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;   /* ⭐ 核心：去黑边 */
}

.about-video-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0,0,0,0.25),
    rgba(0,0,0,0) 30%,
    rgba(0,0,0,0) 70%,
    rgba(0,0,0,0.25)
  );
  pointer-events: none;
}