/* ============================================================
   锦好医疗官网 - 主样式
   风格：中国红 + 深色科技底 + 霓虹光效 + 动效
   响应式：>=1024 桌面 / 768-1023 平板 / <768 手机
   ============================================================ */

:root {
  --red: #d7192b;
  --red-deep: #a30f1f;
  --red-glow: rgba(215, 25, 43, .45);
  --ink: #16181d;
  --gray-1: #5a6068;
  --gray-2: #8e959e;
  --gray-3: #e6e9ee;
  --bg: #ffffff;
  --dark: #12141a;
  --dark-2: #1c1f28;
  --cyan: #38e0d2;
  --radius: 14px;
  --shadow: 0 10px 34px rgba(18, 20, 26, .10);
  --trans: .35s cubic-bezier(.22, .61, .36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans CJK SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: min(1200px, 92vw); margin: 0 auto; }
.hl { color: var(--red); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: .8em 2.2em; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: .04em;
  transition: var(--trans); border: 1px solid transparent; cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--red) 0%, var(--red-deep) 100%);
  color: #fff; box-shadow: 0 6px 22px var(--red-glow);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 30px var(--red-glow); }
.btn-ghost { border-color: rgba(255,255,255,.65); color: #fff; backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255,255,255,.14); transform: translateY(-3px); }
.btn-line { border-color: var(--red); color: var(--red); background: #fff; }
.btn-line:hover { background: var(--red); color: #fff; box-shadow: 0 8px 22px var(--red-glow); }
.btn-light { background: #fff; color: var(--red); box-shadow: 0 8px 26px rgba(0,0,0,.22); }
.btn-light:hover { transform: translateY(-3px); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .6; cursor: wait; transform: none; }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s cubic-bezier(.22,.61,.36,1); }
.reveal.shown { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .12s; } .reveal.d2 { transition-delay: .24s; } .reveal.d3 { transition-delay: .36s; }

/* ---------- 头部 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.86); backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0,0,0,.05);
  transition: var(--trans);
}
.site-header.stuck { box-shadow: 0 4px 20px rgba(18,20,26,.08); }
.header-inner { display: flex; align-items: center; gap: 34px; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { height: 40px; width: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text b { font-size: 19px; letter-spacing: .12em; color: var(--ink); }
.brand-text i { font-style: normal; font-size: 9px; letter-spacing: .14em; color: var(--gray-2); }
.main-nav { display: flex; gap: 6px; margin-left: auto; }
.main-nav a {
  position: relative; padding: 8px 18px; font-size: 15.5px; font-weight: 500; border-radius: 8px;
  transition: var(--trans);
}
.main-nav a::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; width: 0; height: 3px;
  background: linear-gradient(90deg, var(--red), #ff6a3d); border-radius: 3px;
  transition: var(--trans); transform: translateX(-50%);
}
.main-nav a:hover, .main-nav a.active { color: var(--red); }
.main-nav a:hover::after, .main-nav a.active::after { width: 58%; }
.header-cta {
  padding: .55em 1.5em; border-radius: 999px; font-size: 14px; font-weight: 600; color: #fff;
  background: linear-gradient(135deg, var(--red), var(--red-deep));
  box-shadow: 0 4px 14px var(--red-glow); transition: var(--trans); white-space: nowrap;
}
.header-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 20px var(--red-glow); }
.nav-toggle { display: none; }

/* ---------- 首屏轮播 ---------- */
.hero { position: relative; height: min(88vh, 780px); min-height: 540px; overflow: hidden; background: var(--dark); }
.hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1.1s ease; }
.hero-slide.active { opacity: 1; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; animation: slowZoom 7.5s ease-out both; }
@keyframes slowZoom { from { transform: scale(1.08); } to { transform: scale(1); } }
.hero-mask {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,12,18,.55) 0%, rgba(10,12,18,.35) 45%, rgba(10,12,18,.78) 100%);
}
.hero-content {
  position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center;
  color: #fff; z-index: 2; pointer-events: none;
}
.hero-content a { pointer-events: auto; }
.hero-tag {
  display: inline-block; width: fit-content; padding: .4em 1.2em; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.35); background: rgba(215,25,43,.22); backdrop-filter: blur(6px);
  font-size: 13px; letter-spacing: .16em; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(30px, 5.2vw, 58px); font-weight: 800; letter-spacing: .03em; line-height: 1.28; text-shadow: 0 6px 26px rgba(0,0,0,.4); }
.hero h1 .hl { color: #ff5f6d; text-shadow: 0 0 26px var(--red-glow); }
.hero-sub { margin: 18px 0 34px; font-size: clamp(14px, 1.6vw, 17px); color: rgba(255,255,255,.85); max-width: 720px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-dots { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 3; }
.hero-dots .dot { width: 26px; height: 5px; border-radius: 4px; border: 0; background: rgba(255,255,255,.35); cursor: pointer; transition: var(--trans); }
.hero-dots .dot.on { background: var(--red); width: 40px; box-shadow: 0 0 12px var(--red-glow); }
.hero-grid-deco {
  position: absolute; inset: 0; z-index: 1; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(56,224,210,.07) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(56,224,210,.07) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 70% 20%, #000 0%, transparent 60%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 20%, #000 0%, transparent 60%);
}

/* ---------- 数据带 ---------- */
.stats-band { background: linear-gradient(90deg, var(--red-deep), var(--red) 55%, #e64a2e); color: #fff; padding: 46px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; text-align: center; }
.stat .num { display: block; font-size: clamp(32px, 4vw, 46px); font-weight: 800; line-height: 1.2; }
.stat .num::after { content: "+"; font-size: .6em; vertical-align: super; margin-left: 2px; }
.stat span { font-size: 14px; opacity: .92; }

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; }
.section-dark { background: radial-gradient(1000px 500px at 80% -10%, rgba(215,25,43,.16), transparent 60%), var(--dark); color: #e8eaf0; }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; letter-spacing: .04em; }
.sec-head p { color: var(--gray-2); margin-top: 10px; }
.section-dark .sec-head p { color: rgba(232,234,240,.6); }
.sec-more { text-align: center; margin-top: 44px; }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-grid.four { grid-template-columns: repeat(4, 1fr); }
.pcard {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--gray-3); box-shadow: var(--shadow);
  transition: var(--trans); display: flex; flex-direction: column;
}
.pcard:hover { transform: translateY(-8px); border-color: rgba(215,25,43,.35); box-shadow: 0 18px 44px rgba(215,25,43,.14); }
.pcard-img { position: relative; aspect-ratio: 1/1; background: linear-gradient(160deg, #f7f8fb, #eef1f6); overflow: hidden; }
.pcard-img img { width: 100%; height: 100%; object-fit: contain; padding: 12%; transition: var(--trans); }
.pcard:hover .pcard-img img { transform: scale(1.07) rotate(-1.5deg); }
.pcard-cat {
  position: absolute; top: 12px; left: 12px; font-size: 12px; padding: .3em 1em; border-radius: 999px;
  background: rgba(18,20,26,.72); color: #fff; backdrop-filter: blur(4px);
}
.pcard-body { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.pcard-body h3 { font-size: 16.5px; line-height: 1.4; }
.pcard-body p { font-size: 13px; color: var(--gray-1); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pcard-more { margin-top: auto; font-size: 13px; color: var(--red); font-weight: 600; }

/* ---------- 优势网格 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.adv {
  position: relative; padding: 30px 26px; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(160deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.1); transition: var(--trans);
}
.adv::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: var(--trans);
  background: radial-gradient(340px 170px at 12% 0%, rgba(215,25,43,.22), transparent 70%);
}
.adv:hover { transform: translateY(-6px); border-color: rgba(215,25,43,.5); }
.adv:hover::before { opacity: 1; }
.adv-ico {
  display: inline-block; font-style: normal; font-weight: 800; font-size: 15px; letter-spacing: .06em;
  color: var(--red); margin-bottom: 14px;
  background: linear-gradient(120deg, #ff5f6d, var(--red) 60%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.adv h3 { font-size: 17px; margin-bottom: 10px; color: #fff; }
.adv p { font-size: 13.5px; color: rgba(232,234,240,.66); }

/* ---------- 展示图片 ---------- */
.show-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.show-img { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; box-shadow: var(--shadow); }
.show-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--trans); }
.show-img:hover img { transform: scale(1.08); }

/* ---------- CTA ---------- */
.cta-band {
  background:
    radial-gradient(600px 300px at 15% 100%, rgba(56,224,210,.18), transparent 60%),
    linear-gradient(120deg, var(--red-deep), var(--red) 60%, #ef4b3a);
  color: #fff; padding: 74px 0;
}
.cta-inner { text-align: center; display: flex; flex-direction: column; gap: 14px; align-items: center; }
.cta-inner h2 { font-size: clamp(24px, 3.2vw, 36px); font-weight: 800; }
.cta-inner h2 .hl { color: #ffe8e8; text-shadow: 0 0 22px rgba(255,255,255,.5); }
.cta-inner p { opacity: .92; }

/* ---------- 内页横幅 ---------- */
.page-hero {
  position: relative; padding: 168px 0 74px; color: #fff; overflow: hidden;
  background: linear-gradient(140deg, var(--dark) 0%, #2a0d13 62%, var(--red-deep) 130%);
}
.page-hero h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.page-hero p { color: rgba(255,255,255,.72); margin-top: 8px; }
.page-hero-deco {
  position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, transparent, #000 80%);
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 80%);
}

/* ---------- 筛选 ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 44px; }
.chip {
  padding: .5em 1.5em; border-radius: 999px; font-size: 14px; border: 1px solid var(--gray-3);
  color: var(--gray-1); transition: var(--trans); background: #fff;
}
.chip:hover { border-color: var(--red); color: var(--red); }
.chip.on { background: linear-gradient(135deg, var(--red), var(--red-deep)); color: #fff; border-color: transparent; box-shadow: 0 5px 16px var(--red-glow); }
.empty-tip { text-align: center; color: var(--gray-2); padding: 40px 0; }

/* ---------- 产品详情 ---------- */
.pd { padding-top: 130px; }
.crumb { font-size: 13px; color: var(--gray-2); margin-bottom: 30px; }
.crumb a:hover { color: var(--red); }
.pd-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 46px; align-items: start; }
.pd-gallery { background: linear-gradient(160deg, #f7f8fb, #eef1f6); border-radius: var(--radius); padding: 24px; border: 1px solid var(--gray-3); position: sticky; top: 92px; }
.pd-img { width: 100%; aspect-ratio: 1/1; object-fit: contain; }
.pd-thumbs { display: flex; gap: 12px; margin-top: 16px; }
.pd-thumb { width: 74px; height: 74px; object-fit: contain; border-radius: 10px; background: #fff; border: 2px solid transparent; cursor: pointer; padding: 6px; transition: var(--trans); }
.pd-thumb:hover { transform: translateY(-3px); }
.pd-thumb.on { border-color: var(--red); box-shadow: 0 4px 14px var(--red-glow); }
.pd-cat { display: inline-block; font-size: 12.5px; color: var(--red); background: rgba(215,25,43,.08); padding: .35em 1.1em; border-radius: 999px; margin-bottom: 14px; }
.pd-info h1 { font-size: clamp(22px, 3vw, 32px); line-height: 1.4; }
.pd-tag { color: var(--gray-1); margin: 14px 0 26px; font-size: 15.5px; }
.pd-feats { display: flex; flex-direction: column; gap: 12px; margin-bottom: 34px; }
.pd-feats li { display: flex; gap: 12px; align-items: baseline; font-size: 14.5px; color: var(--ink); }
.tick { flex: none; width: 18px; height: 18px; border-radius: 50%; background: linear-gradient(135deg, var(--red), #ff6a3d); position: relative; top: 3px; }
.tick::after { content: ""; position: absolute; left: 5.5px; top: 3.5px; width: 5px; height: 8px; border-right: 2px solid #fff; border-bottom: 2px solid #fff; transform: rotate(45deg); }
.pd-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.pd-desc { margin-top: 70px; }
.pd-desc h2, .pd-related h2 { font-size: 24px; margin-bottom: 22px; }
.pd-desc p { color: var(--gray-1); margin-bottom: 14px; font-size: 15px; }
.pd-related { margin-top: 70px; }

/* ---------- 关于我们 ---------- */
.about-intro { display: grid; grid-template-columns: 1.15fr 1fr; gap: 50px; align-items: center; }
.about-text h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 22px; }
.about-text p { color: var(--gray-1); margin-bottom: 16px; font-size: 15px; text-align: justify; }
.about-img { position: relative; }
.about-img img { border-radius: var(--radius); box-shadow: var(--shadow); }
.about-img .about-img-2 { position: absolute; width: 46%; right: -6%; bottom: -14%; border: 5px solid #fff; }

/* 时间线 */
.timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.tl-item { position: relative; padding: 28px 24px; border-radius: var(--radius); background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); transition: var(--trans); }
.tl-item:hover { transform: translateY(-6px); border-color: rgba(215,25,43,.55); box-shadow: 0 16px 40px rgba(215,25,43,.18); }
.tl-item i { font-style: normal; font-weight: 800; font-size: 22px; color: transparent; background: linear-gradient(120deg, #ff5f6d, #ffb3ab); -webkit-background-clip: text; background-clip: text; display: block; margin-bottom: 12px; }
.tl-item h3 { font-size: 16px; color: #fff; margin-bottom: 8px; }
.tl-item p { font-size: 13.5px; color: rgba(232,234,240,.62); }

.cert-grid { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.cert {
  padding: .8em 1.8em; border-radius: 10px; font-weight: 700; letter-spacing: .05em; font-size: 15px;
  background: #fff; color: var(--red-deep); border: 1px solid var(--gray-3);
  box-shadow: var(--shadow); transition: var(--trans);
}
.cert:hover { transform: translateY(-4px) rotate(-1deg); color: #fff; background: linear-gradient(135deg, var(--red), var(--red-deep)); box-shadow: 0 12px 28px var(--red-glow); }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 40px; align-items: start; }
.contact-cards { display: flex; flex-direction: column; gap: 18px; }
.ccard { display: flex; gap: 18px; align-items: flex-start; background: #fff; border: 1px solid var(--gray-3); border-radius: var(--radius); padding: 22px 24px; box-shadow: var(--shadow); transition: var(--trans); }
.ccard:hover { transform: translateX(6px); border-color: rgba(215,25,43,.4); }
.ccard h3 { font-size: 16px; margin-bottom: 6px; }
.ccard p { font-size: 14px; color: var(--gray-1); }
.ccard a:hover { color: var(--red); }
.cico { flex: none; width: 46px; height: 46px; border-radius: 12px; background: linear-gradient(135deg, rgba(215,25,43,.12), rgba(215,25,43,.04)); position: relative; }
.cico::after { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 20px; }
.cico-tel::after { content: "☎"; color: var(--red); }
.cico-hot::after { content: "✆"; color: var(--red); }
.cico-mail::after { content: "✉"; color: var(--red); }
.cico-loc::after { content: "⚑"; color: var(--red); }
.cmap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 16/7; }
.cmap img { width: 100%; height: 100%; object-fit: cover; }

/* 留言板 */
.gb-panel { background: #fff; border: 1px solid var(--gray-3); border-radius: var(--radius); padding: 34px 32px; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.gb-panel::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--red), #ff6a3d, var(--cyan)); }
.gb-panel h2 { font-size: 22px; }
.gb-tip { color: var(--gray-1); font-size: 13.5px; margin: 8px 0 22px; }
.gb-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
.gb-field { display: block; margin-bottom: 18px; position: relative; }
.gb-field span { display: block; font-size: 13px; color: var(--gray-1); margin-bottom: 7px; }
.gb-field em { color: var(--red); font-style: normal; }
.gb-field input, .gb-field textarea {
  width: 100%; padding: .72em 1em; border-radius: 10px; border: 1.5px solid var(--gray-3);
  font-size: 14.5px; font-family: inherit; transition: var(--trans); background: #fbfcfe; color: var(--ink);
}
.gb-field input:focus, .gb-field textarea:focus { outline: none; border-color: var(--red); box-shadow: 0 0 0 4px rgba(215,25,43,.1); background: #fff; }
.gb-field textarea { resize: vertical; min-height: 110px; }
.gb-hint { font-size: 12px; color: var(--gray-2); margin: -8px 0 14px; }
.gb-count { position: absolute; right: 4px; bottom: 4px; font-size: 12px; color: var(--gray-2); background: #fbfcfe; padding: 0 4px; }
.gb-count.over, .gb-count.over b { color: var(--red); }
.gb-cap-row { display: grid; grid-template-columns: 1fr 170px; gap: 14px; align-items: end; }
.gb-cap-img img { width: 150px; height: 46px; border-radius: 10px; border: 1.5px solid var(--gray-3); cursor: pointer; background: #f3f4f8; }
.gb-privacy { font-size: 12px; color: var(--gray-2); margin-top: 14px; text-align: center; }
.gb-privacy a { color: var(--red); }
.gb-result { margin-top: 16px; padding: 12px 16px; border-radius: 10px; font-size: 14px; }
.gb-result.ok { background: #ebf9f1; color: #118a4c; border: 1px solid #a7e0bf; }
.gb-result.bad { background: #fdefef; color: var(--red-deep); border: 1px solid #f3bcbc; }
.hp-field { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; opacity: 0; }

/* ---------- 隐私页 ---------- */
.legal h2 { font-size: 19px; margin: 34px 0 12px; }
.legal p, .legal li { color: var(--gray-1); font-size: 14.5px; margin-bottom: 10px; text-align: justify; }
.legal ul { padding-left: 18px; list-style: disc; }
.legal a { color: var(--red); }
.legal-updated { font-size: 13px; color: var(--gray-2); }

/* ---------- 错误页 ---------- */
.err-page { padding-top: 190px; text-align: center; }
.err-code { font-size: 64px; color: var(--red); margin-bottom: 12px; }
.err-page p { color: var(--gray-1); margin-bottom: 26px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: rgba(232,234,240,.72); font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.4fr; gap: 36px; padding: 62px 0 40px; }
.f-logo { height: 42px; margin-bottom: 16px; filter: brightness(0) invert(1); opacity: .95; }
.f-company { font-weight: 700; color: #fff; margin-bottom: 8px; }
.f-desc { font-size: 13px; line-height: 1.8; color: rgba(232,234,240,.5); }
.f-col h4 { color: #fff; font-size: 15.5px; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.f-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 26px; height: 3px; border-radius: 3px; background: var(--red); }
.f-col a { display: block; margin-bottom: 10px; color: rgba(232,234,240,.68); transition: var(--trans); }
.f-col a:hover { color: #ff7b88; transform: translateX(4px); }
.f-col p { margin-bottom: 10px; }
.f-map { color: var(--cyan) !important; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0; text-align: center; font-size: 12.5px; color: rgba(232,234,240,.42); }
.footer-bottom a { color: rgba(232,234,240,.6); }
.footer-bottom a:hover { color: #ff7b88; }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; right: 22px; bottom: 30px; width: 44px; height: 44px; border-radius: 12px;
  border: 0; background: linear-gradient(135deg, var(--red), var(--red-deep)); color: #fff; font-size: 18px;
  cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(14px); transition: var(--trans);
  box-shadow: 0 8px 22px var(--red-glow); z-index: 90;
}
.back-top.on { opacity: 1; visibility: visible; transform: none; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .product-grid, .product-grid.four { grid-template-columns: repeat(3, 1fr); }
  .adv-grid, .timeline { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1.3fr; }
  .f-col:nth-child(3) { display: none; }
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .header-cta { display: none; }
  .main-nav {
    position: fixed; top: 72px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: rgba(255,255,255,.98); backdrop-filter: blur(14px); padding: 10px 6vw 18px;
    box-shadow: 0 14px 30px rgba(18,20,26,.12);
    transform: translateY(-130%); transition: var(--trans); margin-left: 0;
  }
  .main-nav.open { transform: none; }
  .main-nav a { padding: 13px 4px; border-bottom: 1px solid var(--gray-3); }
  .main-nav a::after { display: none; }
  .nav-toggle {
    display: flex; flex-direction: column; justify-content: center; gap: 5px;
    width: 40px; height: 40px; border: 0; background: none; cursor: pointer; margin-left: auto;
  }
  .nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; margin: 0 auto; transition: var(--trans); }
  .nav-toggle.on span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.on span:nth-child(2) { opacity: 0; }
  .nav-toggle.on span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .hero { height: 66vh; min-height: 430px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .product-grid, .product-grid.four, .show-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid, .timeline { grid-template-columns: 1fr; }
  .pd-grid, .about-intro, .contact-grid { grid-template-columns: 1fr; gap: 30px; }
  .pd-gallery { position: static; }
  .pd { padding-top: 110px; }
  .about-img .about-img-2 { display: none; }
  .gb-row { grid-template-columns: 1fr; gap: 0; }
  .page-hero { padding: 130px 0 54px; }
  .footer-grid { grid-template-columns: 1fr 1fr; padding: 46px 0 30px; }
  .f-col:nth-child(3) { display: block; }
}
@media (max-width: 420px) {
  .product-grid, .product-grid.four, .show-grid, .stats-grid, .footer-grid { grid-template-columns: 1fr; }
  .gb-cap-row { grid-template-columns: 1fr; }
  .gb-cap-img img { width: 100%; }
}