/* =================================================================
   贝多尼地漏 — 官网样式
   设计: 意式精工 + 不锈钢卫浴基调
   色彩: 钢灰 + 黄铜金 + 米白
================================================================= */

:root {
  --c-bg: #fafaf6;
  --c-bg-soft: #f3f1eb;
  --c-ink: #1a1a1a;
  --c-ink-2: #4a4a48;
  --c-ink-3: #7a7a76;
  --c-line: #e6e3d8;
  --c-steel: #2c3640;
  --c-steel-2: #1e252e;
  --c-brass: #b08d57;
  --c-brass-2: #8a6a3a;
  --c-brass-soft: #d8c79a;
  --c-white: #ffffff;
  --c-accent: #b08d57;
  --c-err: #c0392b;
  --shadow-sm: 0 1px 3px rgba(30, 37, 46, .06), 0 1px 2px rgba(30, 37, 46, .04);
  --shadow-md: 0 6px 18px rgba(30, 37, 46, .08), 0 2px 6px rgba(30, 37, 46, .05);
  --shadow-lg: 0 18px 48px rgba(30, 37, 46, .12), 0 4px 12px rgba(30, 37, 46, .06);
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 16px;
  --max: 1240px;
  --pad: 24px;
  --ff: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --ff-serif: "Source Han Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--ff);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video { max-width: 100%; display: block; }
a { color: var(--c-steel); text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-brass); }
hr { border: 0; border-top: 1px solid var(--c-line); margin: 32px 0; }

h1, h2, h3, h4 { font-family: var(--ff-serif); font-weight: 600; color: var(--c-ink); line-height: 1.35; margin: 0 0 0.5em; }
h1 { font-size: clamp(28px, 3.6vw, 44px); letter-spacing: -0.01em; }
h2 { font-size: clamp(22px, 2.4vw, 30px); margin-top: 0.6em; }
h3 { font-size: clamp(18px, 1.6vw, 21px); }
h4 { font-size: 17px; }
p { margin: 0 0 1em; color: var(--c-ink-2); }
small, .sm { color: var(--c-ink-3); font-size: 13px; }
ul, ol { margin: 0 0 1em; padding-left: 1.4em; }
li { margin: 4px 0; color: var(--c-ink-2); }

/* layout */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.row { display: flex; flex-wrap: wrap; gap: 24px; }
.col { flex: 1 1 0; min-width: 0; }

/* announcement bar */
.topbar {
  background: var(--c-steel-2);
  color: #c8ccd3;
  font-size: 13px;
  text-align: center;
  padding: 8px var(--pad);
  letter-spacing: 0.04em;
}
.topbar a { color: var(--c-brass-soft); }

/* header */
.header {
  background: var(--c-white);
  border-bottom: 1px solid var(--c-line);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(160%) blur(8px);
  background-color: rgba(255,255,255,0.92);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px var(--pad); max-width: var(--max); margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--c-steel) 0%, var(--c-steel-2) 100%);
  color: var(--c-brass-soft);
  display: grid; place-items: center;
  border-radius: var(--r-sm);
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
  position: relative;
  overflow: hidden;
}
.brand-mark::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(176,141,87,0.25) 50%, transparent 60%);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-family: var(--ff-serif); font-size: 20px; font-weight: 600; color: var(--c-ink); }
.brand-sub { font-size: 12px; color: var(--c-ink-3); letter-spacing: 0.08em; margin-top: 2px; }

.nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav a {
  color: var(--c-ink-2);
  padding: 8px 14px;
  font-size: 15px;
  border-radius: var(--r-sm);
  position: relative;
}
.nav a:hover, .nav a.active { color: var(--c-brass-2); background: var(--c-bg-soft); }
.nav .cta {
  background: var(--c-steel);
  color: var(--c-white) !important;
  padding: 8px 18px;
  border-radius: var(--r-sm);
  margin-left: 8px;
}
.nav .cta:hover { background: var(--c-brass-2); color: var(--c-white) !important; }

/* mobile nav */
.menu-btn { display: none; background: none; border: 0; padding: 8px; cursor: pointer; color: var(--c-ink); }
@media (max-width: 900px) {
  .nav { display: none; }
  .nav.open { display: flex; flex-direction: column; align-items: stretch; width: 100%; gap: 0; padding: 8px var(--pad) 16px; background: var(--c-white); border-top: 1px solid var(--c-line); }
  .nav.open a { padding: 12px 0; border-bottom: 1px solid var(--c-line); border-radius: 0; }
  .nav.open .cta { margin: 12px 0 0; text-align: center; }
  .menu-btn { display: inline-flex; align-items: center; gap: 4px; }
  .header-inner { flex-wrap: wrap; }
  .header-inner > .nav { order: 3; flex-basis: 100%; }
}

/* hero */
.hero {
  position: relative;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(176,141,87,0.18), transparent 60%),
    linear-gradient(180deg, #1e252e 0%, #2c3640 100%);
  color: var(--c-white);
  padding: 96px 0 110px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero-inner { position: relative; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center; }
@media (max-width: 900px) { .hero-inner { grid-template-columns: 1fr; gap: 36px; } }
.hero h1 { color: var(--c-white); font-size: clamp(32px, 4.6vw, 56px); margin-bottom: 16px; }
.hero h1 em { font-style: normal; color: var(--c-brass-soft); }
.hero p.lead { color: #cfd2d8; font-size: clamp(15px, 1.4vw, 18px); max-width: 580px; }
.hero-meta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 24px 32px; }
.hero-meta .item { display: flex; align-items: center; gap: 10px; color: #cfd2d8; font-size: 14px; }
.hero-meta .item strong { color: var(--c-brass-soft); font-size: 22px; font-family: var(--ff-serif); }
.hero-cta { margin-top: 36px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px;
  border-radius: var(--r-sm);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .2s;
}
.btn-primary { background: var(--c-brass); color: var(--c-white); }
.btn-primary:hover { background: var(--c-brass-2); color: var(--c-white); }
.btn-ghost { background: transparent; color: var(--c-white); border-color: rgba(255,255,255,0.3); }
.btn-ghost:hover { border-color: var(--c-brass-soft); color: var(--c-brass-soft); }
.btn-dark { background: var(--c-steel); color: var(--c-white); }
.btn-dark:hover { background: var(--c-steel-2); color: var(--c-white); }

/* hero visual */
.hero-visual {
  position: relative;
  aspect-ratio: 4/5;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,0.1);
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.hero-badge {
  position: absolute;
  top: 16px; left: 16px;
  background: rgba(255,255,255,0.95);
  color: var(--c-steel);
  font-size: 12px; letter-spacing: 0.1em;
  padding: 6px 12px; border-radius: 999px;
  font-weight: 500;
}
.hero-floating {
  position: absolute;
  bottom: 18px; right: 18px;
  background: rgba(20, 25, 32, 0.85);
  color: var(--c-white);
  padding: 14px 18px;
  border-radius: var(--r-md);
  font-size: 13px;
  line-height: 1.5;
  border: 1px solid rgba(176,141,87,0.4);
  backdrop-filter: blur(8px);
  max-width: 240px;
}
.hero-floating strong { color: var(--c-brass-soft); display: block; margin-bottom: 4px; font-size: 14px; }

/* section */
.section { padding: 80px 0; }
.section-sm { padding: 56px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow { display: inline-block; color: var(--c-brass-2); font-size: 13px; letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: 12px; font-weight: 500; }
.section-head h2 { color: var(--c-ink); margin-top: 0; }
.section-head p { color: var(--c-ink-3); font-size: 16px; }

.divider { width: 40px; height: 2px; background: var(--c-brass); margin: 16px auto 0; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: 32px 28px;
  transition: all .25s;
  position: relative;
}
.card:hover { border-color: var(--c-brass-soft); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card .icon {
  width: 48px; height: 48px;
  background: var(--c-bg-soft);
  color: var(--c-brass-2);
  display: grid; place-items: center;
  border-radius: var(--r-sm);
  font-size: 22px; font-weight: 600;
  margin-bottom: 18px;
  font-family: var(--ff-serif);
}
.card h3 { font-size: 18px; margin: 0 0 10px; color: var(--c-ink); }
.card p { font-size: 14.5px; color: var(--c-ink-2); margin: 0; line-height: 1.7; }

/* product grid */
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }
.product-card {
  background: var(--c-white);
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--c-line);
  transition: all .3s;
  display: flex; flex-direction: column;
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--c-brass-soft); }
.product-card .img { aspect-ratio: 4/3; overflow: hidden; background: var(--c-bg-soft); position: relative; }
.product-card .img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.product-card:hover .img img { transform: scale(1.04); }
.product-card .body { padding: 22px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.product-card h3 { font-size: 19px; margin: 0 0 8px; }
.product-card .tag { display: inline-block; padding: 3px 10px; background: var(--c-bg-soft); color: var(--c-brass-2); font-size: 12px; border-radius: 999px; margin-bottom: 12px; }
.product-card p { font-size: 14.5px; color: var(--c-ink-2); margin: 0 0 14px; flex: 1; }
.product-card .more { color: var(--c-brass-2); font-size: 14px; font-weight: 500; }

/* stats strip */
.stats {
  background: var(--c-steel-2);
  color: var(--c-white);
  padding: 60px 0;
}
.stats .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; text-align: center; }
.stats .num { font-family: var(--ff-serif); font-size: 44px; color: var(--c-brass-soft); font-weight: 600; line-height: 1; }
.stats .label { color: #c8ccd3; font-size: 14px; margin-top: 10px; letter-spacing: 0.04em; }

/* FAQ */
.faq { max-width: 820px; margin: 0 auto; }
.faq details {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  padding: 4px 22px;
  transition: all .2s;
}
.faq details[open] { border-color: var(--c-brass-soft); box-shadow: var(--shadow-sm); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 0;
  font-weight: 500;
  color: var(--c-ink);
  position: relative;
  padding-right: 36px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0; top: 50%; transform: translateY(-50%);
  font-size: 22px; color: var(--c-brass-2);
  font-weight: 300;
  transition: transform .2s;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { padding-bottom: 12px; color: var(--c-ink-2); font-size: 15px; line-height: 1.8; }

/* breadcrumb */
.crumb {
  background: var(--c-bg-soft);
  padding: 14px var(--pad);
  font-size: 14px;
  color: var(--c-ink-3);
  border-bottom: 1px solid var(--c-line);
}
.crumb a { color: var(--c-ink-2); }
.crumb a:hover { color: var(--c-brass-2); }
.crumb .sep { margin: 0 8px; color: var(--c-ink-3); }
.crumb .now { color: var(--c-brass-2); }

/* page hero (inner) */
.page-hero {
  background: linear-gradient(135deg, #1e252e 0%, #2c3640 100%);
  color: var(--c-white);
  padding: 60px 0 50px;
  position: relative;
}
.page-hero::after {
  content: "";
  position: absolute; bottom: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-brass), transparent);
}
.page-hero h1 { color: var(--c-white); margin-bottom: 12px; }
.page-hero p { color: #cfd2d8; max-width: 720px; font-size: 16px; }

/* article list */
.article-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 28px; }
.article-card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: all .2s;
  display: flex; flex-direction: column;
}
.article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.article-card .body { padding: 22px 24px; flex: 1; }
.article-card .meta { color: var(--c-ink-3); font-size: 12px; margin-bottom: 10px; letter-spacing: 0.05em; }
.article-card h3 { font-size: 18px; margin: 0 0 8px; line-height: 1.4; }
.article-card p { font-size: 14px; color: var(--c-ink-2); margin: 0; }
.article-card .foot { padding: 14px 24px; border-top: 1px solid var(--c-line); color: var(--c-brass-2); font-size: 14px; }

/* case list */
.case-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.case-card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-brass);
  border-radius: var(--r-md);
  padding: 24px 26px;
  transition: all .2s;
}
.case-card:hover { box-shadow: var(--shadow-md); }
.case-card .name { font-family: var(--ff-serif); font-size: 18px; margin-bottom: 6px; color: var(--c-ink); }
.case-card .role { color: var(--c-brass-2); font-size: 13px; margin-bottom: 12px; }
.case-card p { font-size: 14.5px; color: var(--c-ink-2); margin: 0; }
.case-card .quote { font-style: normal; padding-top: 14px; margin-top: 14px; border-top: 1px dashed var(--c-line); color: var(--c-ink-2); font-size: 14px; }
.case-card .quote::before { content: "\201C"; color: var(--c-brass); font-size: 32px; line-height: 0; vertical-align: -12px; margin-right: 4px; font-family: serif; }
.case-card .quote::after { content: "\201D"; color: var(--c-brass); font-size: 32px; line-height: 0; vertical-align: -12px; margin-left: 4px; font-family: serif; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; gap: 32px; } }
.contact-card { background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--r-md); padding: 32px 30px; }
.contact-card h3 { margin-top: 0; }
.kv { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--c-line); font-size: 15px; }
.kv:last-child { border-bottom: 0; }
.kv .k { width: 90px; color: var(--c-ink-3); flex-shrink: 0; }
.kv .v { color: var(--c-ink); flex: 1; word-break: break-all; }

.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 14px; color: var(--c-ink-2); margin-bottom: 6px; }
.form-row input, .form-row textarea, .form-row select {
  width: 100%; padding: 11px 14px; font: inherit; color: var(--c-ink);
  background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--r-sm);
  transition: border-color .2s;
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus { outline: 0; border-color: var(--c-brass); }
.form-row textarea { min-height: 100px; resize: vertical; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .form-grid-2 { grid-template-columns: 1fr; } }
.form-hint { font-size: 12px; color: var(--c-ink-3); margin-top: 4px; }

/* footer */
.footer {
  background: var(--c-steel-2);
  color: #c8ccd3;
  padding: 64px 0 24px;
  margin-top: 0;
}
.footer h4 { color: var(--c-white); font-size: 14px; letter-spacing: 0.08em; margin-bottom: 16px; font-family: var(--ff); text-transform: uppercase; }
.footer .grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
@media (max-width: 900px) { .footer .grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 600px) { .footer .grid { grid-template-columns: 1fr; } }
.footer a { color: #c8ccd3; font-size: 14px; }
.footer a:hover { color: var(--c-brass-soft); }
.footer .brand-line { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer .brand-line .brand-mark { width: 36px; height: 36px; font-size: 16px; }
.footer .brand-line .brand-name { color: var(--c-white); font-size: 18px; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer ul li { margin: 8px 0; color: #c8ccd3; font-size: 14px; }
.footer ul li a { color: #c8ccd3; }
.footer .desc { color: #8a8f97; font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.footer .meta { color: #8a8f97; font-size: 13px; }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid #3a4350; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; color: #8a8f97; font-size: 13px; }

/* tags */
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--c-bg-soft);
  color: var(--c-ink-2);
  font-size: 13px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
}
.tag.brass { background: var(--c-brass-soft); color: var(--c-brass-2); border-color: transparent; }

/* callout */
.callout {
  background: linear-gradient(135deg, var(--c-bg-soft) 0%, #eee9d9 100%);
  border-left: 4px solid var(--c-brass);
  border-radius: var(--r-md);
  padding: 24px 28px;
  margin: 24px 0;
}
.callout h4 { margin-top: 0; color: var(--c-steel); }
.callout p:last-child { margin-bottom: 0; }

/* two-col content */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 800px) { .two-col { grid-template-columns: 1fr; gap: 28px; } }

/* feature list with checkmark */
.feats { list-style: none; padding: 0; }
.feats li { padding: 8px 0 8px 28px; position: relative; color: var(--c-ink-2); }
.feats li::before {
  content: "";
  position: absolute;
  left: 0; top: 16px;
  width: 16px; height: 16px;
  background: var(--c-brass-soft);
  border-radius: 50%;
}
.feats li::after {
  content: "";
  position: absolute;
  left: 5px; top: 21px;
  width: 6px; height: 3px;
  border-left: 2px solid var(--c-brass-2);
  border-bottom: 2px solid var(--c-brass-2);
  transform: rotate(-45deg);
}

/* gallery */
.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.gallery .item { aspect-ratio: 4/3; overflow: hidden; border-radius: var(--r-md); border: 1px solid var(--c-line); }
.gallery .item img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.gallery .item:hover img { transform: scale(1.05); }
.gallery .cap { margin-top: 8px; font-size: 13px; color: var(--c-ink-3); text-align: center; }

/* utility */
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.text-center { text-align: center; }
.muted { color: var(--c-ink-3); }
.hide { display: none; }
@media (max-width: 600px) {
  .section { padding: 56px 0; }
  .section-sm { padding: 40px 0; }
  .page-hero { padding: 40px 0 36px; }
  .hero { padding: 64px 0 70px; }
  .stats { padding: 48px 0; }
}

/* ===== 交互增强：场景选购器 / 滚动渐显 / 移动吸底 ===== */

/* hero 增强光晕 */
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(620px 420px at 14% 122%, rgba(176,141,87,0.20), transparent 60%);
  pointer-events: none;
}

/* 场景选购器（参考潜水艇"按场景选"思路） */
.scenario { background: var(--c-bg); }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; max-width: 900px; margin: 0 auto 26px; }
.scene {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 18px 14px; border: 1px solid var(--c-line); border-radius: var(--r-md);
  background: var(--c-white); color: var(--c-ink); cursor: pointer;
  font-family: var(--ff); font-size: 15px; transition: all .2s;
}
.scene:hover { border-color: var(--c-brass); box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.scene.active { border-color: var(--c-brass); background: var(--c-bg-soft); color: var(--c-brass-2); font-weight: 600; }
.scenario-result { max-width: 900px; margin: 0 auto; min-height: 140px; }
.sr-default { text-align: center; color: var(--c-ink-3); padding: 46px 16px; border: 1px dashed var(--c-line); border-radius: var(--r-md); }
.sr-card {
  background: var(--c-white); border: 1px solid var(--c-brass-soft); border-radius: var(--r-md);
  padding: 28px 30px; box-shadow: var(--shadow-md);
  display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center;
}
.sr-card h3 { margin: 0 0 10px; font-size: 21px; }
.sr-card .why { color: var(--c-ink-2); font-size: 15px; margin: 0 0 12px; line-height: 1.7; }
.sr-card .tip { background: var(--c-bg-soft); border-left: 3px solid var(--c-brass); padding: 11px 15px; border-radius: var(--r-sm); font-size: 14px; color: var(--c-ink-2); margin: 0 0 16px; }
.sr-card .tip b { color: var(--c-brass-2); }
.sr-card .spec { display: flex; gap: 8px; flex-wrap: wrap; }
@media (max-width: 700px) {
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .sr-card { grid-template-columns: 1fr; }
}

/* 滚动渐显 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* 移动端吸底咨询条（参考九牧移动端转化条） */
.mobile-cta {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  display: none; align-items: center; gap: 10px;
  background: rgba(30,37,46,0.97); backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255,255,255,0.10);
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
}
.mobile-cta .mc-txt { color: #cfd2d8; font-size: 13px; flex: 1; line-height: 1.4; }
.mobile-cta .mc-txt b { color: var(--c-brass-soft); }
.mobile-cta a { flex: 0 0 auto; }
@media (max-width: 700px) {
  .mobile-cta.show { display: flex; }
  body { padding-bottom: 60px; }
}

/* 面包屑导航 */
.crumb { background: var(--c-bg-soft); border-bottom: 1px solid var(--c-line); padding: 13px 0; font-size: 13px; color: var(--c-ink-3); }
.crumb a { color: var(--c-brass-2); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }

/* FAQ 中心页 */
.hero-sm { padding: 52px 0 30px; background: linear-gradient(135deg, var(--c-steel) 0%, var(--c-steel-2) 100%); color: var(--c-white); }
.hero-sm .eyebrow { color: var(--c-brass-soft); letter-spacing: .12em; font-size: 13px; margin-bottom: 12px; }
.hero-sm h1 { font-size: 30px; margin: 0 0 12px; color: var(--c-white); }
.hero-sm .lead { color: #cfd2d8; max-width: 760px; margin: 0; font-size: 15px; line-height: 1.8; }
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 36px 0; }
.faq-item { background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--r-md); padding: 22px 24px; box-shadow: var(--shadow-sm); }
.faq-item h3 { margin: 0 0 10px; font-size: 17px; color: var(--c-steel); line-height: 1.5; }
.faq-item h3::before { content: "Q "; color: var(--c-brass); font-weight: 700; }
.faq-item p { margin: 0; color: var(--c-ink-2); font-size: 14.5px; line-height: 1.85; }
.cta-band { background: var(--c-bg-soft); border: 1px solid var(--c-brass-soft); border-radius: var(--r-lg); padding: 34px 32px; text-align: center; margin: 10px 0 30px; }
.cta-band h2 { margin: 0 0 8px; font-size: 22px; }
.cta-band p { margin: 0 0 20px; color: var(--c-ink-2); }
.cta-band .hero-cta { justify-content: center; }
@media (max-width: 700px) {
  .faq-list { grid-template-columns: 1fr; }
  .hero-sm h1 { font-size: 25px; }
}

/* 产品对比表（维度三·差异化占位） */
.compare-table { overflow-x: auto; margin: 8px 0 6px; }
.compare-table table { width: 100%; border-collapse: collapse; min-width: 640px; background: var(--c-white); border-radius: var(--r-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.compare-table th, .compare-table td { padding: 15px 18px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--c-line); vertical-align: top; }
.compare-table thead th { background: var(--c-steel); color: var(--c-white); font-weight: 600; font-size: 15px; }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table td:first-child { font-weight: 600; color: var(--c-steel); width: 16%; white-space: nowrap; }
.compare-table td:nth-child(2) { color: var(--c-ink-3); }
.compare-table td.bd { color: var(--c-ink); background: var(--c-bg-soft); font-weight: 500; }
.compare-table th.bd { background: var(--c-brass); color: #1a1f26; }
.compare-note { font-size: 13px; color: var(--c-ink-3); margin: 14px 0 0; }
@media (max-width: 700px) {
  .compare-table th, .compare-table td { padding: 12px 13px; font-size: 13.5px; }
}

/* 相关产品卡片（产品页互链） */
a.card { display: block; color: inherit; }
.rel-card { transition: transform .2s, box-shadow .2s; }
.rel-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--c-brass) !important; }

/* 404 热门入口 */
.pop-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 28px 0 4px; }
.pop { display: block; padding: 16px 12px; border: 1px solid var(--c-line); border-radius: var(--r-md);
  background: var(--c-white); color: var(--c-steel); font-weight: 600; transition: all .2s; }
.pop:hover { border-color: var(--c-brass); color: var(--c-brass); box-shadow: var(--shadow-sm); }
@media (max-width: 700px) { .pop-grid { grid-template-columns: repeat(2, 1fr); } }