:root{
  --bg:#ffffff;
  --bg-alt:#f9fafb;
  --text:#1f2937;
  --muted:#6b7280;
  --green:#16a34a;
  --green-dark:#15803d;
  --border:#e5e7eb;
  --radius:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Arial, Helvetica, "Segoe UI", sans-serif;
  font-size:16px;
  line-height:1.65;
}
a{color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s;
}
.site-header.is-scrolled{
  box-shadow:0 2px 12px rgba(0,0,0,.06);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;position:relative}
.logo{font-size:22px;font-weight:800;letter-spacing:.5px;text-decoration:none;color:var(--text)}
.logo img{display:block;height:32px;width:auto;}
.site-nav{display:flex;align-items:center;gap:24px}
.nav-link{text-decoration:none;font-size:15px;color:var(--text);padding:6px 0;border-bottom:2px solid transparent}
.nav-link:hover,.nav-link.is-active{color:var(--green);border-bottom-color:var(--green)}
.nav-toggle{display:none;background:none;border:0;padding:8px;cursor:pointer}
.nav-toggle__bars{display:block;width:24px}
.nav-toggle__bars i{display:block;height:2px;background:var(--text);margin:5px 0}

/* 语言下拉 */
.lang{position:relative}
.lang__btn{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--border);border-radius:8px;padding:7px 10px;font:inherit;cursor:pointer}
.lang__caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid var(--text)}
.lang__menu{position:absolute;right:0;top:calc(100% + 6px);min-width:150px;margin:0;padding:6px;list-style:none;background:#fff;border:1px solid var(--border);border-radius:8px;display:none;z-index:20}
.lang.is-open .lang__menu{display:block}
.lang__menu li{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:6px;cursor:pointer;font-size:14px}
.lang__menu li:hover{background:var(--bg-alt)}

/* 国旗图标：统一 20×14 */
.lang__flag{display:inline-flex;align-items:center;justify-content:center;flex:none}
.lang__flag img{
  display:block;
  width:20px;
  height:14px;
  object-fit:cover;
  border-radius:2px;
}

/* ============ Hero：左文案 + 右轮播卡片 ============ */
.hero{
  padding:72px 0 80px;
  background:linear-gradient(180deg,#fff 0%,var(--bg-alt) 100%);
  overflow:hidden;
}
.hero__inner{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:64px;
  align-items:center;
}
.hero__eyebrow{
  display:block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--text);
  opacity:.6;
  margin:0 0 18px;
}
.hero__title{
  font-size:clamp(30px,4vw,50px);
  line-height:1.16;
  letter-spacing:-.02em;
  font-weight:800;
  margin:0;
}
.hero__desc{
  margin:24px 0 0;
  max-width:520px;
  color:var(--muted);
  font-size:16px;
  line-height:1.75;
}
.hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:32px;
}
.hero__meta{
  display:flex;
  flex-wrap:wrap;
  gap:36px;
  margin:40px 0 0;
  padding:24px 0 0;
  border-top:1px solid var(--border);
  list-style:none;
}
.hero__meta li{
  display:flex;
  flex-direction:column;
  gap:4px;
}
.hero__meta strong{
  font-size:22px;
  font-weight:800;
  color:var(--text);
  letter-spacing:-.01em;
}
.hero__meta span{
  font-size:13px;
  color:var(--muted);
}
.hero__visual{
  position:relative;
}
.hero__card{
  position:relative;
  border-radius:24px;
  overflow:hidden;
  background:var(--bg-alt);
  border:1px solid var(--border);
  aspect-ratio:4/5;
}
.hero__card .carousel{
  position:absolute;
  inset:0;
  border-radius:0;
}
.hero__card .carousel__viewport,
.hero__card .carousel__track,
.hero__card .carousel__slide{
  height:100%;
}
.hero__card .carousel__slide img{
  width:100%;
  height:100%;
  aspect-ratio:auto;
  object-fit:cover;
}
.hero__badge{
  position:absolute;
  left:18px;
  bottom:18px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-radius:999px;
  padding:10px 16px;
  font-size:13px;
  font-weight:600;
  color:var(--text);
  z-index:3;
}
.hero__badge-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--green);
  flex:none;
}
.hero__blob{
  position:absolute;
  right:-80px;
  top:-80px;
  width:260px;
  height:260px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(22,163,74,.14),transparent 70%);
  z-index:-1;
  pointer-events:none;
}

/* Hero 入场动画 */
.hero__copy > *{
  opacity:0;
  transform:translateY(14px);
  animation:heroIn .7s cubic-bezier(.4,0,.2,1) forwards;
}
.hero__copy > *:nth-child(1){animation-delay:.05s}
.hero__copy > *:nth-child(2){animation-delay:.16s}
.hero__copy > *:nth-child(3){animation-delay:.27s}
.hero__copy > *:nth-child(4){animation-delay:.36s}
.hero__copy > *:nth-child(5){animation-delay:.45s}
.hero__visual{
  opacity:0;
  transform:translateY(18px) scale(.98);
  animation:heroIn .85s cubic-bezier(.4,0,.2,1) .22s forwards;
}
@keyframes heroIn{
  to{opacity:1;transform:none}
}
/* 数据条 */
.stats{
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  background:#fff;
}
.stats__grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  padding:40px 0;
}
.stat{
  display:flex;
  flex-direction:column;
  gap:4px;
}
.stat strong{
  font-size:28px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--text);
}
.stat span{
  color:var(--muted);
  font-size:13px;
}

/* 轮播 */
.carousel{position:relative;border-radius:var(--radius);overflow:hidden;background:#fff}
.carousel__viewport{overflow:hidden}
.carousel__track{
  display:flex;width:100%;margin:0;padding:0;list-style:none;
  transition:transform .55s cubic-bezier(.4,0,.2,1);
}
.carousel__slide{flex:0 0 100%;min-width:0}
.carousel__slide img{
  display:block;
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.carousel__btn{
  position:absolute;top:50%;transform:translateY(-50%);
  width:40px;height:40px;border-radius:50%;
  background:#fff;border:1px solid var(--border);color:var(--text);
  font-size:20px;line-height:1;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  z-index:2;transition:background .2s,color .2s,border-color .2s;
}
.carousel__btn:hover{background:var(--green);border-color:var(--green);color:#fff}
.carousel__btn--prev{left:14px}
.carousel__btn--next{right:14px}
.carousel__dots{position:absolute;left:0;right:0;bottom:14px;display:flex;justify-content:center;gap:8px;z-index:2}
.carousel__dot{
  width:8px;height:8px;padding:0;border:0;border-radius:999px;
  background:rgba(31,41,55,.22);cursor:pointer;
  transition:width .3s,background .3s;
}
.carousel__dot.is-active{width:22px;background:var(--green)}

/* buttons */
.btn{display:inline-block;padding:12px 24px;border-radius:6px;text-decoration:none;font-weight:700;font-size:15px;border:1px solid transparent;cursor:pointer}
.btn--primary{background:var(--green);color:#fff}
.btn--primary:hover{background:var(--green-dark)}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--border)}
.btn--ghost:hover{border-color:var(--green);color:var(--green)}
.btn-row{display:flex;gap:14px;flex-wrap:wrap}
.btn-row--spaced{margin-top:28px;}

/* section */
.section{padding:72px 0}
.section--alt{background:var(--bg-alt)}
.section__head{max-width:760px;margin-bottom:36px}
.section__head h1{font-size:36px;margin:0 0 10px}
.section__head h2{font-size:30px;margin:0 0 10px}
.section__head p{color:var(--muted);margin:0}
.section__eyebrow{
  display:block;
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--text);
  opacity:.55;
  margin:0 0 12px;
}

/* grid */
.grid{display:grid;gap:24px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

/* cards */
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted)}
.card--feature{
  display:flex;
  flex-direction:column;
  gap:14px;
  padding:24px;
  transition:border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.card--feature:hover{
  border-color:var(--green);
  transform:translateY(-3px);
  box-shadow:0 6px 18px rgba(22,163,74,.08);
}
.card--feature:hover .card__icon{
  background:#dcfce7;
}
.card__icon{
  width:48px;height:48px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:#f0fdf4;border-radius:10px;
}
.card__icon img{display:block;width:48px;height:48px}
.card__title{margin:0;font-size:18px;font-weight:700}
.card__desc{margin:0;color:var(--muted)}

/* image placeholder */
.ph{
  width:100%;
  background:#f3f4f6;
  border:1px dashed #d1d5db;
  color:#9ca3af;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  font-size:14px;
  border-radius:var(--radius);
  padding:8px;
}
.ph--3x4{aspect-ratio:3/4}
.ph--4x3{aspect-ratio:4/3}
.ph--16x9{aspect-ratio:16/9}
.ph--21x9{aspect-ratio:21/9}
.ph--1x1{aspect-ratio:1/1}
.ph--soft{
  background:#f0fdf4;
  color:var(--green);
  border-color:#bbf7d0;
}

/* 主打品类卡片（可点击） */
.tile{
  display:block;
  text-align:center;
  text-decoration:none;
  color:inherit;
  border-radius:var(--radius);
  transition:transform .25s ease;
}
.tile img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:3/4;
  object-fit:cover;
  border-radius:var(--radius);
  background:#f3f4f6;
  transition:box-shadow .25s ease;
}
.tile:hover{transform:translateY(-3px)}
.tile:hover img{box-shadow:0 8px 20px rgba(22,163,74,.12)}
.tile:focus-visible{
  outline:2px solid var(--green);
  outline-offset:4px;
}
.tile figcaption,
.tile__caption{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:3px;
  margin-top:12px;
}
.tile__cn{font-size:16px;font-weight:700;color:var(--text);line-height:1.3}
.tile__en{
  font-size:11px;
  font-weight:600;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
}

/* 主打品类：横向滚动 */
.tile-scroll{
  display:grid;
  grid-auto-flow:column;
  grid-auto-columns:calc((100% - 72px) / 4);
  gap:24px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  scroll-behavior:smooth;
  padding-bottom:10px;
  scrollbar-width:thin;
  scrollbar-color:var(--border) transparent;
}
.tile-scroll .tile{
  scroll-snap-align:start;
  margin:0;
}
.tile-scroll::-webkit-scrollbar{height:6px}
.tile-scroll::-webkit-scrollbar-track{background:transparent}
.tile-scroll::-webkit-scrollbar-thumb{
  background:var(--border);
  border-radius:999px;
}
.tile-scroll:focus-visible{
  outline:2px solid var(--green);
  outline-offset:4px;
  border-radius:var(--radius);
}

/* 合作流程：带连接线的步骤条 */
.steps{
  list-style:none;
  padding:0;
  margin:0;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  position:relative;
}
.step{
  position:relative;
  padding:0 28px 0 0;
}
.step__num{
  display:flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:50%;
  background:#f0fdf4;
  color:var(--green);
  font-weight:800;
  font-size:15px;
  letter-spacing:.5px;
  margin-bottom:18px;
  position:relative;
  z-index:1;
}
.step h3{
  margin:0 0 6px;
  font-size:18px;
}
.step p{
  margin:0;
  color:var(--muted);
  font-size:14px;
  line-height:1.6;
  max-width:220px;
}
.step::after{
  content:"";
  position:absolute;
  top:22px;
  left:52px;
  right:8px;
  height:2px;
  background:repeating-linear-gradient(
    to right,
    var(--border) 0 6px,
    transparent 6px 12px
  );
}
.step:last-child::after{display:none}

/* 为什么选择 Knitpact */
.why{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.why__item{
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  gap:14px;
  padding:28px 20px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:border-color .2s, transform .2s;
}
.why__item:hover{
  border-color:var(--green);
  transform:translateY(-2px);
}
.why__icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:48px;
  height:48px;
  border-radius:50%;
  background:#f0fdf4;
  flex:none;
}
.why__icon img{display:block;width:48px;height:48px}
.why__item h3{margin:0;font-size:17px;font-weight:700}
.why__item p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}

/* 样衣展示：悬停轻放大 */
.sample{
  overflow:hidden;
  border-radius:var(--radius);
  background:#f3f4f6;
}
.sample img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:3/4;
  object-fit:cover;
  transition:transform .35s ease;
}
.sample:hover img{
  transform:scale(1.05);
}

/* 开始合作 */
.start-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:start}
.form{display:grid;gap:16px}
.form label{display:block;font-weight:700;margin-bottom:6px}
.form input,.form textarea{
  width:100%;padding:12px;border:1px solid var(--border);
  border-radius:8px;font:inherit;background:#fff;color:var(--text);
}
.form textarea{min-height:110px;resize:vertical}
.form input:focus,.form textarea:focus{outline:2px solid var(--green);outline-offset:1px;border-color:var(--green)}

/* 文件上传（选填） */
.form-file{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
}
.form-file input[type="file"]{
  font:inherit;
  font-size:14px;
  color:var(--text);
}
.form-file input[type="file"]::file-selector-button{
  font:inherit;
  font-size:14px;
  font-weight:700;
  padding:9px 16px;
  margin-right:12px;
  border:1px solid var(--border);
  border-radius:6px;
  background:#fff;
  color:var(--text);
  cursor:pointer;
}
.form-file input[type="file"]::file-selector-button:hover{
  border-color:var(--green);
  color:var(--green);
}
.form-file__name{
  color:var(--muted);
  font-size:14px;
  word-break:break-all;
}
.form-msg{color:var(--green);font-weight:700;margin:10px 0 0}
/* 必填标记 */
.form-req{
  color:#dc2626;
  font-weight:400;
}

/* 表单消息：成功 / 失败 */
.form-msg{
  margin:10px 0 0;
  padding:10px 14px;
  border-radius:6px;
  font-size:14px;
  font-weight:600;
}
.form-msg--success{
  background:#f0fdf4;
  color:var(--green);
  border:1px solid #bbf7d0;
}
.form-msg--error{
  background:#fef2f2;
  color:#dc2626;
  border:1px solid #fecaca;
}

/* Turnstile 容器 */
.cf-turnstile{
  margin:4px 0;
}
.mode-card{
  background:var(--bg-alt);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:26px;
}
/* 合作模式：职责分工 */
.mode-split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin:0 0 20px;
  padding:16px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:8px;
}
.mode-split__col h4{
  margin:0 0 8px;
  font-size:13px;
  font-weight:700;
  color:var(--green);
  letter-spacing:.05em;
}
.mode-split__col ul{
  list-style:none;
  margin:0;
  padding:0;
  font-size:13px;
  color:var(--muted);
  line-height:1.7;
}
.mode-split__col li{
  position:relative;
  padding-left:14px;
}
.mode-split__col li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--border);
}

@media (max-width:600px){
  .mode-split{grid-template-columns:1fr;gap:14px;padding:14px}
}
.mode-card h3{margin:0 0 12px;font-size:18px}
.mode-card > p{margin:0 0 18px;color:var(--muted)}
.mode-list{list-style:none;margin:0;padding:0}
.mode-list li{
  display:flex;justify-content:space-between;gap:16px;
  padding:10px 0;border-top:1px solid var(--border);font-size:14px;
}
.mode-list li:first-child{border-top:0}
.mode-list span{color:var(--muted);flex:none}
.mode-list strong{font-weight:700;text-align:right}
/* 合作模式：社媒入口 */
.mode-social{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:20px 0 0;
  padding:16px 0 0;
  border-top:1px solid var(--border);
}
.mode-social a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border-radius:8px;
  background:#fff;
  border:1px solid var(--border);
  transition:border-color .2s, background .2s, transform .2s;
}
.mode-social a:hover{
  border-color:var(--green);
  background:#f0fdf4;
  transform:translateY(-2px);
}
.mode-social img{
  display:block;
  width:18px;
  height:18px;
  opacity:.7;
  transition:opacity .2s;
  
}
.mode-social a:hover img{
  opacity:1;
}
/* feature blocks（内页） */
.feature{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
  margin-bottom:56px;
  scroll-margin-top:90px;
}
.feature:last-child{margin-bottom:0}
.feature--rev .feature__media{order:-1}
.feature__media{
  overflow:hidden;
  border-radius:var(--radius);
  background:#f3f4f6;
}
.feature__media img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:4/3;
  object-fit:cover;
  transition:transform .35s ease;
}
.feature__media:hover img{
  transform:scale(1.04);
}
.feature h2{margin:0 0 12px;font-size:26px}
.feature p{color:var(--muted);margin:0 0 10px}
.feature ul{margin:10px 0 0;padding-left:20px;color:var(--muted)}
.feature__media--video video{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius);
  background:#000;
}

/* 款式 / 面料列表卡片 */
.spec-list{
  list-style:none;
  margin:20px 0 0;
  padding:0;
  display:grid;
  gap:10px;
}
.spec-list li{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:14px 16px;
  background:#fff;
  border:1px solid var(--border);
  border-left:3px solid var(--green);
  border-radius:8px;
}
.spec-list__name{
  font-weight:700;
  font-size:15px;
  color:var(--text);
}
.spec-list__note{
  font-size:13px;
  color:var(--muted);
  line-height:1.55;
}
.spec-list__more{
  margin:12px 0 0;
  font-size:13px;
  color:var(--muted);
}

/* 工艺整合：2×2 卡片 */
.craft-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
  margin-top:20px;
}
.craft-card{
  padding:16px 18px;
  background:#fff;
  border:1px solid var(--border);
  border-left:3px solid var(--green);
  border-radius:8px;
}
.craft-card__title{
  margin:0 0 8px;
  font-size:14px;
  font-weight:700;
  color:var(--text);
}
.craft-card__list{
  list-style:none;
  margin:0;
  padding:0;
  font-size:13px;
  color:var(--muted);
  line-height:1.9;
}

@media (max-width:600px){
  .craft-grid{grid-template-columns:1fr}
  .craft-card{padding:14px 16px}
}

/* 专长 / 可承接 标签 */
.tag{
  display:inline-block;
  font-size:12px;
  font-weight:700;
  padding:2px 8px;
  border-radius:999px;
  vertical-align:middle;
  margin-left:8px;
}
.tag--primary{background:#f0fdf4;color:var(--green)}
.tag--secondary{background:#f3f4f6;color:var(--muted)}
.ip-note{
  margin:16px 0 0;
  padding:12px 14px;
  background:#f0fdf4;
  border-left:3px solid var(--green);
  border-radius:0 8px 8px 0;
  font-size:13px;
  color:var(--text);
  line-height:1.6;
}

@media (max-width:600px){
  .spec-list li{padding:12px 14px}
}

/* timeline */
.timeline{list-style:none;padding:0;margin:0;position:relative}
.timeline::before{content:"";position:absolute;left:11px;top:0;bottom:0;width:2px;background:var(--border)}
.timeline li{position:relative;padding-left:42px;padding-bottom:28px}
.timeline li::before{content:"";position:absolute;left:4px;top:6px;width:16px;height:16px;border-radius:50%;background:var(--green);border:3px solid #fff;box-shadow:0 0 0 2px var(--green)}
.timeline h3{margin:0 0 4px;font-size:18px}
.timeline p{margin:0;color:var(--muted)}

/* 滚动显现 */
@media (scripting: enabled){
  .timeline li{
    opacity:0;
    transform:translateY(28px);
    transition:opacity .6s ease, transform .6s cubic-bezier(.4,0,.2,1);
    transition-delay:calc(var(--i, 0) * 100ms);
    will-change:opacity, transform;
  }
  .timeline li.is-visible{
    opacity:1;
    transform:translateY(0);
  }
}

/* 滚动显现：默认隐藏，JS 触发后显示 */
@media (scripting: enabled){
  .timeline li{
    opacity:0;
    transform:translateY(28px);
    transition:opacity .6s ease, transform .6s cubic-bezier(.4,0,.2,1);
    transition-delay:calc(var(--i, 0) * 100ms);
    will-change:opacity, transform;
  }
  .timeline li.is-visible{
    opacity:1;
    transform:translateY(0);
  }
}

/* qc */
.qc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.qc-grid .card{
  transition:border-color .2s, transform .2s;
}
.qc-grid .card:hover{
  border-color:var(--green);
  transform:translateY(-2px);
}

/* FAQ */
.faq-group{
  font-size:16px;
  font-weight:700;
  color:var(--green);
  margin:36px 0 14px;
  padding-bottom:8px;
  border-bottom:2px solid #f0fdf4;
}
.faq-group:first-of-type{
  margin-top:0;
}
details{border:1px solid var(--border);border-radius:8px;padding:16px 20px;margin-bottom:12px;background:#fff}
summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--green);font-size:20px;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:12px 0 0;color:var(--muted)}

/* contact 页 */
.contact-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:40px}
.info-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.info-card h3{margin:0 0 14px}
.info-card ul{list-style:none;padding:0;margin:0}
.info-card li{margin-bottom:10px;color:var(--muted)}
.info-card a{color:var(--green);text-decoration:none}
.info-card__note{
  margin:18px 0 0;
  padding-top:14px;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:14px;
}

/* legal */
.anchor-nav{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  margin:0 0 32px;
}
.anchor-nav a{
  color:var(--green);
  font-weight:700;
  text-decoration:none;
}

/* 锚点导航吸顶 */
.anchor-nav--sticky{
  position:sticky;
  top:72px;
  z-index:40;
  background:var(--bg);
  padding:12px 0;
  margin:0 0 24px;
  border-bottom:1px solid var(--border);
}

.legal-note{
  background:#f9fafb;
  border-left:3px solid var(--green);
  padding:12px 14px;
  border-radius:0 8px 8px 0;
  font-size:13px;
  color:var(--text);
  line-height:1.7;
  margin:0 0 24px;
}

.legal-block{
  padding:26px 0;
  border-top:1px solid var(--border);
  scroll-margin-top:140px;
}
.legal-block h2{
  margin:0 0 10px;
  font-size:24px;
}
.legal-block h2 .legal-en{
  font-size:15px;
  font-weight:400;
  color:var(--muted);
  margin-left:8px;
}
.legal-block h3{
  margin:22px 0 8px;
  font-size:16px;
  color:var(--text);
}
.legal-block p{
  color:var(--muted);
  margin:0 0 10px;
}
.legal-updated{
  font-size:13px;
  color:var(--muted);
  margin-bottom:16px;
}

/* footer */
.site-footer{background:#111827;color:#d1d5db;padding:56px 0 0;margin-top:0}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr .9fr 1.2fr .9fr;
  gap:40px;
}
.footer-social{
  display:flex;
  gap:12px;
  margin-top:16px;
}
.footer-social a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:8px;
  background:rgba(255,255,255,.06);
  transition:background .2s;
}
.footer-social a:hover{
  background:rgba(255,255,255,.14);
}
.footer-social img{
  display:block;
  width:18px;
  height:18px;
  opacity:.75;
  transition:opacity .2s;
}
.footer-social a:hover img{
  opacity:1;
}
.footer-col h3{color:#fff;font-size:16px;margin:0 0 14px}
.footer-col p,.footer-col ul{margin:0;padding:0;list-style:none;color:#9ca3af;font-size:14px}
.footer-col li{margin-bottom:8px}
.footer-col a{color:#d1d5db;text-decoration:none}
.footer-col a:hover{color:#fff}
.footer-col--contact li{white-space:normal;word-break:break-word}
.footer-logo{font-size:20px;font-weight:800;color:#fff;margin-bottom:10px}
.footer-bottom{border-top:1px solid #1f2937;margin-top:40px;padding:18px 0;font-size:13px;color:#9ca3af}
/* 页脚：WhatsApp / 微信 同一号码 */
.footer-im{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-top:14px;
  padding:8px 14px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.08);
  border-radius:999px;
}
.footer-im__icons{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.footer-im__num{
  color:#e5e7eb;
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  letter-spacing:.01em;
  transition:color .2s;
}
.footer-im__num:hover{
  color:#fff;
}
/* responsive */
@media (max-width:1000px){
  .hero__inner{
    display:grid;
    grid-template-columns:0.95fr 1.05fr;
    gap:40px;
    align-items:center;
  }
  .hero__title{font-size:34px}
  .start-grid{grid-template-columns:1fr;gap:28px}
  .why{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.6fr .9fr 1.2fr .9fr;gap:28px}
}
@media (max-width:900px){
  .nav-toggle{display:block}
  .site-nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    background:#fff;border-bottom:1px solid var(--border);
    padding:16px 20px;flex-direction:column;align-items:flex-start;gap:14px;
    box-shadow:0 12px 24px rgba(0,0,0,.06)
  }
  .site-nav.is-open{display:flex}
  .lang__menu{position:static;display:none;width:100%;margin-top:8px}
  .lang.is-open .lang__menu{display:block}
  .hero{padding:56px 0 64px}
  .hero__inner{grid-template-columns:1fr;gap:36px}
  .hero__title{font-size:32px}
  .hero__desc{font-size:15px;max-width:none}
  .hero__visual{max-width:480px}
  .grid--3,.grid--4,.qc-grid{grid-template-columns:repeat(2,1fr)}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:20px;padding:32px 0}
  .tile-scroll{grid-auto-columns:calc((100% - 24px) / 2)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .why{grid-template-columns:repeat(2,1fr);gap:20px}
  .why__item{padding:24px 18px}
  .feature{grid-template-columns:1fr}
  .feature--rev .feature__media{order:0}
  .contact-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section__head h1{font-size:30px}
}
@media (max-width:600px){
  .grid--3,.grid--4,.qc-grid{grid-template-columns:1fr}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:16px;padding:28px 0}
  .stat strong{font-size:22px}
  .stat span{font-size:12px}
  .tile-scroll{grid-auto-columns:72%;gap:16px;}
  .why{grid-template-columns:1fr;gap:16px}
  .why__item{
    flex-direction:row;
    align-items:flex-start;
    text-align:left;
    gap:16px;
    padding:20px;
  }
  .why__item h3{margin-top:2px}
  .footer-grid{grid-template-columns:1fr}
  .hero{padding:44px 0 52px}
  .hero__title{font-size:26px}
  .hero__desc{font-size:14.5px}
  .hero__meta{gap:24px;margin-top:28px;padding-top:20px}
  .hero__meta strong{font-size:18px}
  .hero__card{aspect-ratio:3/4}
  .section{padding:56px 0}
  .wrap{padding:0 16px}
  .carousel__btn{width:34px;height:34px;font-size:18px}
  .carousel__btn--prev{left:10px}
  .carousel__btn--next{right:10px}
}
@media (prefers-reduced-motion:reduce){
  .carousel__track{transition:none}
  .hero__copy > *,
  .hero__visual{opacity:1;transform:none;animation:none}
}