/* ===================================================================
   锦水防水补漏 · 简约企业站  (template-10)
   单文件样式 · CSS 变量驱动 · 零外部依赖
   =================================================================== */
:root {
  --c-primary: #0e9aa7;
  --c-primary-dark: #0a7b85;
  --c-primary-light: #e6f6f7;
  --c-accent: #ef7c3c;
  --c-accent-dark: #d9651f;

  --c-ink: #1f2d3d;
  --c-text: #51606e;
  --c-muted: #8794a1;
  --c-line: #e7edf1;
  --c-bg: #ffffff;
  --c-soft: #f4f9fa;
  --c-dark: #112a30;

  --font: 'PingFang SC', 'Microsoft YaHei', -apple-system, 'Segoe UI', sans-serif;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --shadow: 0 10px 30px rgba(17, 42, 48, 0.08);
  --shadow-sm: 0 4px 16px rgba(17, 42, 48, 0.06);
  --shadow-lg: 0 20px 50px rgba(17, 42, 48, 0.14);
  --container: 1140px;
  --ease: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

* , *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--c-text); background: var(--c-bg); line-height: 1.75; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
h1, h2, h3, h4 { color: var(--c-ink); line-height: 1.3; font-weight: 800; }
::selection { background: var(--c-primary); color: #fff; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.section { padding: 76px 0; }
.section--soft { background: var(--c-soft); }
.text-c { text-align: center; }
.muted { color: var(--c-muted); }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 600; padding: 12px 24px; border-radius: var(--radius-sm); transition: var(--ease); cursor: pointer; white-space: nowrap; }
.btn .ic { width: 18px; height: 18px; fill: currentColor; }
.btn--primary { background: var(--c-primary); color: #fff; box-shadow: 0 10px 22px rgba(14, 154, 167, 0.28); }
.btn--primary:hover { background: var(--c-primary-dark); transform: translateY(-2px); }
.btn--accent { background: var(--c-accent); color: #fff; box-shadow: 0 10px 22px rgba(239, 124, 60, 0.28); }
.btn--accent:hover { background: var(--c-accent-dark); transform: translateY(-2px); }
.btn--outline { background: #fff; color: var(--c-primary-dark); border: 1.5px solid var(--c-line); }
.btn--outline:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn--light { background: #fff; color: var(--c-primary-dark); }
.btn--light:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn--ghost { background: rgba(255,255,255,0.12); color: #fff; border: 1.5px solid rgba(255,255,255,0.4); }
.btn--ghost:hover { background: rgba(255,255,255,0.22); }
.btn--lg { padding: 15px 30px; font-size: 16px; }
.btn--block { display: flex; justify-content: center; width: 100%; }

.icon { width: 22px; height: 22px; fill: currentColor; flex-shrink: 0; }

/* ---------- top bar ---------- */
.topbar { background: var(--c-dark); color: #cfe3e6; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; height: 38px; }
.topbar a { color: #fff; }
.topbar .tb-phone { font-weight: 700; color: #fff; display: inline-flex; align-items: center; gap: 6px; }
.topbar .tb-phone .icon { width: 15px; height: 15px; }
@media (max-width: 640px) { .topbar .tb-co { display: none; } }

/* ---------- header / nav ---------- */
.header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.95); backdrop-filter: blur(8px); border-bottom: 1px solid var(--c-line); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo img { height: 34px; }
.nav-menu { display: flex; gap: 4px; }
.nav-menu a { padding: 8px 14px; font-size: 15px; font-weight: 500; color: var(--c-text); border-radius: 8px; transition: var(--ease); }
.nav-menu a:hover { color: var(--c-primary); background: var(--c-primary-light); }
.nav-menu a.active { color: var(--c-primary); font-weight: 700; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-cta { display: inline-flex; }
.nav-toggle { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; border-radius: 8px; color: var(--c-ink); }
.nav-toggle .icon { width: 26px; height: 26px; }
.nav-toggle .ic-close { display: none; }

@media (max-width: 920px) {
  .nav-toggle { display: inline-flex; }
  .nav-menu { position: fixed; inset: 106px 0 auto 0; flex-direction: column; gap: 0; background: #fff; padding: 12px 20px 24px; border-bottom: 1px solid var(--c-line); box-shadow: var(--shadow); transform: translateY(-130%); transition: var(--ease); }
  .nav-menu a { padding: 14px 8px; border-bottom: 1px solid var(--c-line); border-radius: 0; }
  body.nav-open .nav-menu { transform: translateY(0); }
  body.nav-open .nav-toggle .ic-menu { display: none; }
  body.nav-open .nav-toggle .ic-close { display: block; }
  .nav-cta { display: none; }
}

/* ---------- hero ---------- */
.hero { position: relative; background: linear-gradient(135deg, #0e9aa7 0%, #0a7b85 60%, #0c6b73 100%); color: #fff; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -120px; right: -80px; width: 380px; height: 380px; border-radius: 50%; background: rgba(255,255,255,0.08); }
.hero::after { content: ''; position: absolute; bottom: -140px; left: -60px; width: 320px; height: 320px; border-radius: 50%; background: rgba(255,255,255,0.06); }
.hero .container { position: relative; padding-top: 70px; padding-bottom: 70px; }
.hero__tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.16); padding: 7px 16px; border-radius: 999px; font-size: 14px; font-weight: 600; margin-bottom: 22px; }
.hero h1 { color: #fff; font-size: 44px; line-height: 1.18; margin-bottom: 18px; }
.hero p { color: rgba(255,255,255,0.9); font-size: 17px; max-width: 640px; margin-bottom: 30px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }
.hero__cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.hero__card { background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.18); border-radius: var(--radius); padding: 18px; }
.hero__card .k { font-size: 13px; color: rgba(255,255,255,0.75); margin-bottom: 6px; }
.hero__card .v { font-size: 19px; font-weight: 800; color: #fff; }
@media (max-width: 760px) { .hero h1 { font-size: 32px; } .hero__cards { grid-template-columns: repeat(2, 1fr); } }

/* ---------- section title ---------- */
.sec-head { text-align: center; max-width: 660px; margin: 0 auto 44px; }
.sec-head .eyebrow { display: inline-flex; align-items: center; gap: 7px; color: var(--c-primary-dark); background: var(--c-primary-light); font-size: 13px; font-weight: 700; padding: 6px 15px; border-radius: 999px; margin-bottom: 16px; }
.sec-head h2 { font-size: 32px; margin-bottom: 12px; }
.sec-head p { color: var(--c-muted); }
@media (max-width: 760px) { .sec-head h2 { font-size: 26px; } }

/* ---------- grids ---------- */
.grid { display: grid; gap: 24px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 920px) { .g3, .g4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .g2, .g3, .g4 { grid-template-columns: 1fr; } }

/* ---------- service cards ---------- */
.svc { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 28px 24px; transition: var(--ease); }
.svc:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: transparent; }
.svc__ic { width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center; background: var(--c-primary-light); color: var(--c-primary-dark); margin-bottom: 16px; }
.svc__ic .icon { width: 28px; height: 28px; }
.svc h3 { font-size: 19px; margin-bottom: 10px; }
.svc p { font-size: 14.5px; color: var(--c-text); margin-bottom: 14px; }
.link-a { display: inline-flex; align-items: center; gap: 5px; color: var(--c-primary); font-weight: 600; font-size: 14px; }
.link-a .icon { width: 16px; height: 16px; transition: var(--ease); }
.svc:hover .link-a .icon, .qa:hover .link-a .icon { transform: translateX(4px); }

/* ---------- Q&A list ---------- */
.qa { display: block; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 20px 24px; transition: var(--ease); }
.qa:hover { box-shadow: var(--shadow-sm); transform: translateY(-3px); border-color: transparent; }
.qa__no { font-size: 12px; font-weight: 700; color: var(--c-primary); background: var(--c-primary-light); padding: 3px 10px; border-radius: 999px; }
.qa h3 { font-size: 16px; margin: 12px 0 6px; }
.qa p { font-size: 14px; color: var(--c-muted); margin-bottom: 12px; }

/* ---------- photo card (施工 / 公司展示) ---------- */
.photo { border-radius: var(--radius); overflow: hidden; background: #fff; border: 1px solid var(--c-line); box-shadow: var(--shadow-sm); }
.photo__img { aspect-ratio: 4/3; overflow: hidden; }
.photo__img img { width: 100%; height: 100%; object-fit: cover; transition: var(--ease); }
.photo:hover .photo__img img { transform: scale(1.05); }
.photo__cap { padding: 14px 18px; font-size: 14.5px; font-weight: 600; color: var(--c-ink); }
.photo__cap span { display: block; font-size: 12.5px; font-weight: 400; color: var(--c-muted); margin-top: 3px; }

/* ---------- case card ---------- */
.case { display: block; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; transition: var(--ease); }
.case:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: transparent; }
.case__img { aspect-ratio: 16/10; overflow: hidden; }
.case__img img { width: 100%; height: 100%; object-fit: cover; transition: var(--ease); }
.case:hover .case__img img { transform: scale(1.06); }
.case__body { padding: 18px 20px; }
.case__tag { display: inline-block; font-size: 12px; font-weight: 700; color: var(--c-accent-dark); background: #fff1e8; padding: 3px 11px; border-radius: 999px; margin-bottom: 10px; }
.case h3 { font-size: 17px; margin-bottom: 8px; }
.case p { font-size: 14px; color: var(--c-muted); }

/* ---------- cert grid ---------- */
.cert { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 16px; text-align: center; transition: var(--ease); }
.cert:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.cert img { border-radius: var(--radius-sm); margin-bottom: 12px; width: 100%; }
.cert .name { font-size: 14.5px; font-weight: 600; color: var(--c-ink); }

/* ---------- info / why list ---------- */
.feat { display: flex; gap: 14px; padding: 4px 0; }
.feat__ic { width: 44px; height: 44px; border-radius: 12px; background: var(--c-primary-light); color: var(--c-primary-dark); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.feat__ic .icon { width: 22px; height: 22px; }
.feat h4 { font-size: 16px; margin-bottom: 4px; }
.feat p { font-size: 14px; color: var(--c-muted); }

/* ---------- split (text + image) ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split img { border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.split .eyebrow { display: inline-flex; align-items: center; gap: 7px; color: var(--c-primary-dark); background: var(--c-primary-light); font-size: 13px; font-weight: 700; padding: 6px 15px; border-radius: 999px; margin-bottom: 16px; }
.split h2 { font-size: 30px; margin-bottom: 16px; }
.split p { margin-bottom: 16px; }
.split .infos { display: grid; gap: 8px; margin: 18px 0 24px; }
.split .infos li { display: flex; gap: 10px; font-size: 15px; }
.split .infos b { color: var(--c-ink); min-width: 70px; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 28px; } }

/* ---------- QR block ---------- */
.qrbox { display: grid; grid-template-columns: 200px 1fr; gap: 32px; align-items: center; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow-sm); }
.qrbox img { width: 200px; border-radius: var(--radius); }
.qrbox h3 { font-size: 22px; margin-bottom: 10px; }
.qrbox ol { margin: 14px 0 0 18px; color: var(--c-text); }
.qrbox ol li { margin-bottom: 6px; }
@media (max-width: 600px) { .qrbox { grid-template-columns: 1fr; justify-items: center; text-align: center; } .qrbox ol { text-align: left; } }

/* ---------- contact cards ---------- */
.cinfo { display: flex; gap: 14px; align-items: flex-start; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 22px; }
.cinfo__ic { width: 48px; height: 48px; border-radius: 12px; background: var(--c-primary-light); color: var(--c-primary-dark); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.cinfo h4 { font-size: 15px; margin-bottom: 4px; }
.cinfo p { font-size: 14.5px; color: var(--c-text); word-break: break-all; }

/* douyin accounts */
.acct { display: flex; align-items: center; gap: 14px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 18px 20px; transition: var(--ease); }
.acct:hover { box-shadow: var(--shadow-sm); }
.acct__av { width: 48px; height: 48px; border-radius: 50%; background: var(--c-dark); color: #fff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-weight: 800; }
.acct h4 { font-size: 15.5px; }
.acct p { font-size: 13px; color: var(--c-muted); }

/* page banner (inner pages) */
.banner { background: var(--c-soft); padding: 50px 0; text-align: center; border-bottom: 1px solid var(--c-line); }
.banner h1 { font-size: 34px; margin-bottom: 10px; }
.banner p { color: var(--c-muted); max-width: 620px; margin: 0 auto; }
.crumb { margin-top: 14px; font-size: 13px; color: var(--c-muted); }
.crumb a:hover { color: var(--c-primary); }
.crumb .sep { margin: 0 8px; }

/* CTA strip */
.cta { background: linear-gradient(135deg, #0e9aa7, #0a7b85); border-radius: var(--radius-lg); padding: 50px 40px; text-align: center; color: #fff; position: relative; overflow: hidden; }
.cta::before { content: ''; position: absolute; top: -90px; right: -50px; width: 260px; height: 260px; border-radius: 50%; background: rgba(255,255,255,0.08); }
.cta h2 { color: #fff; font-size: 28px; margin-bottom: 12px; position: relative; }
.cta p { color: rgba(255,255,255,0.9); margin-bottom: 24px; position: relative; }
.cta .btn-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; }

/* ---------- footer ---------- */
.footer { background: var(--c-dark); color: #9fb6bb; padding: 56px 0 0; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; }
.footer img { height: 34px; margin-bottom: 16px; }
.footer p { font-size: 14px; line-height: 1.8; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer__links li, .footer__contact li { margin-bottom: 10px; font-size: 14px; }
.footer__links a:hover { color: #fff; }
.footer__contact li { display: flex; gap: 9px; align-items: flex-start; }
.footer__contact .icon { width: 17px; height: 17px; margin-top: 4px; color: var(--c-primary); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 18px 0; font-size: 13px; text-align: center; color: #7f969b; }
@media (max-width: 760px) { .footer__grid { grid-template-columns: 1fr; gap: 28px; } }

/* ---------- back to top + reveal ---------- */
.totop { position: fixed; right: 22px; bottom: 22px; width: 46px; height: 46px; border-radius: 12px; background: var(--c-primary); color: #fff; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(12px); transition: var(--ease); z-index: 40; }
.totop.show { opacity: 1; visibility: visible; transform: translateY(0); }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }