/* ==========================================================================
   深圳市鑫立达塑胶制品有限公司 — 企业官网样式
   工业制造调性 · 深墨蓝 + 科技蓝 + 琥珀强调色
   ========================================================================== */

/* ---------- 0. Design Tokens ---------- */
:root {
  --ink: #0A1220;
  --ink-2: #101B2D;
  --ink-3: #1A2740;
  --body: #3E4B5E;
  --muted: #7A8798;
  --line: #E3E9F1;
  --line-2: #EEF2F7;

  --bg: #FFFFFF;
  --bg-soft: #F5F8FC;
  --bg-soft-2: #ECF1F8;

  --blue: #1560D4;
  --blue-d: #0D4499;
  --blue-l: #E9F1FE;
  --amber: #E1811F;
  --amber-l: #FDF4E8;

  --r: 4px;
  --r-lg: 8px;
  --sh-s: 0 1px 2px rgba(10, 18, 32, .05), 0 3px 10px rgba(10, 18, 32, .05);
  --sh-m: 0 8px 28px rgba(10, 18, 32, .09);
  --sh-l: 0 20px 52px rgba(10, 18, 32, .16);

  --maxw: 1240px;
  --hdr-h: 72px;

  --ff: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC",
        "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
}

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--ff);
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4, h5 { margin: 0; color: var(--ink); font-weight: 700; line-height: 1.3; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* ---------- 2. Layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.sec { padding: 88px 0; }
.sec--soft { background: var(--bg-soft); }
.sec--ink { background: var(--ink); color: #A8B6C8; }
.sec--ink h2, .sec--ink h3 { color: #fff; }
.sec--tight { padding: 64px 0; }

/* ---------- 3. Type helpers ---------- */
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--blue);
  margin-bottom: 14px;
}
.kicker::before { content: ""; width: 22px; height: 2px; background: var(--amber); }
.sec-head { max-width: 760px; margin-bottom: 48px; }
.sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head--center .kicker { justify-content: center; }
.sec-head h2 { font-size: 34px; margin-bottom: 16px; }
.sec-head p { font-size: 15.5px; color: var(--muted); margin: 0; }
.sec--ink .sec-head p { color: #93A3B8; }
.lead { font-size: 16.5px; line-height: 1.85; }

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 26px; border-radius: var(--r);
  font-size: 14.5px; font-weight: 600; letter-spacing: .02em;
  transition: .25s ease; white-space: nowrap;
}
.btn svg { width: 15px; height: 15px; flex: none; }
.btn--pri { background: var(--blue); color: #fff; box-shadow: 0 4px 14px rgba(21, 96, 212, .28); }
.btn--pri:hover { background: var(--blue-d); transform: translateY(-2px); box-shadow: 0 8px 22px rgba(21, 96, 212, .34); }
.btn--ghost { border: 1px solid rgba(255, 255, 255, .38); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }
.btn--out { border: 1px solid var(--line); color: var(--ink); background: #fff; }
.btn--out:hover { border-color: var(--blue); color: var(--blue); }
.btn--amber { background: var(--amber); color: #fff; box-shadow: 0 4px 14px rgba(225, 129, 31, .3); }
.btn--amber:hover { background: #C96F12; transform: translateY(-2px); }
.btn--sm { height: 38px; padding: 0 18px; font-size: 13.5px; }
.btn--lg { height: 52px; padding: 0 34px; font-size: 15.5px; }

/* ---------- 5. Topbar ---------- */
.topbar { background: var(--ink); color: #8B9BB0; font-size: 13px; }
.topbar__in { display: flex; align-items: center; justify-content: space-between; height: 40px; }
.topbar__l { display: flex; align-items: center; gap: 22px; }
.topbar__i { display: inline-flex; align-items: center; gap: 7px; }
.topbar__i svg { width: 13px; height: 13px; color: var(--amber); flex: none; }
.topbar__i b { color: #D6E0EC; font-weight: 600; letter-spacing: .02em; }
.topbar__r { display: flex; align-items: center; gap: 20px; }
.topbar a:hover { color: #fff; }

/* ---------- 6. Header ---------- */
.hdr {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255, 255, 255, .95);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.hdr.is-stuck { box-shadow: 0 6px 24px rgba(10, 18, 32, .07); }
.hdr__in { display: flex; align-items: center; justify-content: space-between; height: var(--hdr-h); gap: 20px; }
.hdr .wrap { max-width: 1360px; }

.logo { display: flex; align-items: center; gap: 11px; flex: none; }
.logo__mark { width: 40px; height: 40px; flex: none; }
.logo__img { height: 40px; width: auto; display: block; }
.ftr .logo__img { height: 36px; }
.logo__t { line-height: 1.15; }
.logo__t strong { display: block; font-size: 17.5px; color: var(--ink); letter-spacing: .04em; font-weight: 800; }
.logo__t span { display: block; font-size: 10px; color: var(--muted); letter-spacing: .13em; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 2px; }
.nav > li > a {
  display: block; padding: 0 12px; height: var(--hdr-h); line-height: var(--hdr-h);
  font-size: 14.5px; font-weight: 500; color: var(--ink-3); position: relative;
  transition: color .2s; white-space: nowrap;
}
.nav > li > a::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 16px;
  height: 2px; background: var(--blue); transform: scaleX(0); transition: transform .28s ease;
  transform-origin: left;
}
.nav > li > a:hover, .nav > li > a.on { color: var(--blue); }
.nav > li > a:hover::after, .nav > li > a.on::after { transform: scaleX(1); }

.hdr__cta { display: flex; align-items: center; gap: 12px; flex: none; }
.hdr__tel { text-align: right; line-height: 1.25; }
.hdr__tel span { display: block; font-size: 10.5px; color: var(--muted); letter-spacing: .1em; }
.hdr__tel b { font-size: 16px; color: var(--ink); font-weight: 800; letter-spacing: .01em; }

.burger { display: none; width: 42px; height: 42px; border-radius: var(--r); align-items: center; justify-content: center; }
.burger span { display: block; width: 20px; height: 2px; background: var(--ink); position: relative; transition: .25s; }
.burger span::before, .burger span::after {
  content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: var(--ink); transition: .25s;
}
.burger span::before { top: -6px; }
.burger span::after { top: 6px; }
.is-open .burger span { background: transparent; }
.is-open .burger span::before { top: 0; transform: rotate(45deg); }
.is-open .burger span::after { top: 0; transform: rotate(-45deg); }

/* Mobile drawer */
.drawer {
  position: fixed; inset: 0 0 0 auto; width: min(340px, 86vw); z-index: 120;
  background: #fff; transform: translateX(100%); transition: transform .32s cubic-bezier(.4, 0, .2, 1);
  display: flex; flex-direction: column; box-shadow: var(--sh-l); overflow-y: auto;
}
.drawer.is-open { transform: none; }
.drawer__hd { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.drawer__x { width: 36px; height: 36px; border-radius: var(--r); font-size: 22px; color: var(--muted); line-height: 1; }
.drawer__x:hover { background: var(--bg-soft); color: var(--ink); }
.drawer nav { padding: 8px 0; }
.drawer nav a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 15px 22px; font-size: 15.5px; color: var(--ink-3); border-bottom: 1px solid var(--line-2);
}
.drawer nav a.on { color: var(--blue); font-weight: 700; box-shadow: inset 3px 0 0 var(--blue); }
.drawer nav a svg { width: 14px; height: 14px; color: #C3CDDB; }
.drawer__ft { padding: 22px; margin-top: auto; background: var(--bg-soft); }
.drawer__ft p { font-size: 13px; color: var(--muted); margin: 0 0 6px; }
.drawer__ft b { color: var(--ink); font-size: 19px; font-weight: 800; }
.scrim { position: fixed; inset: 0; background: rgba(10, 18, 32, .5); z-index: 110; opacity: 0; visibility: hidden; transition: .3s; }
.scrim.on { opacity: 1; visibility: visible; }

/* ---------- 7. Hero ---------- */
.hero { position: relative; background: var(--ink); overflow: hidden; }
.hero__bg { position: absolute; inset: 0; }
.hero__bg img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(6, 12, 22, .95) 0%, rgba(8, 16, 30, .86) 42%, rgba(9, 18, 32, .48) 100%);
}
.hero__in { position: relative; z-index: 2; padding: 132px 0 118px; max-width: 800px; }
.hero h1 { color: #fff; font-size: 46px; line-height: 1.24; letter-spacing: -.015em; margin-bottom: 22px; }
.hero h1 em { font-style: normal; color: #FFB459; }
.hero__sub { font-size: 16.5px; color: #B7C5D6; max-width: 640px; line-height: 1.85; margin-bottom: 16px; }
.hero__pts { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.hero__pts span {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 100px; font-size: 13.5px; color: #D3DEE9;
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .14);
}
.hero__pts svg { width: 13px; height: 13px; color: #FFB459; }
.hero__btns { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__bar {
  position: relative; z-index: 3; border-top: 1px solid rgba(255, 255, 255, .1);
  background: rgba(6, 12, 22, .6);
}
.hero__bar ul { display: grid; grid-template-columns: repeat(4, 1fr); }
.hero__bar li { padding: 26px 24px; border-right: 1px solid rgba(255, 255, 255, .08); }
.hero__bar li:last-child { border-right: 0; }
.hero__bar b { display: block; font-size: 30px; font-weight: 800; color: #fff; letter-spacing: -.01em; line-height: 1.2; }
.hero__bar b i { font-style: normal; font-size: 17px; color: #FFB459; margin-left: 2px; }
.hero__bar span { font-size: 13.5px; color: #93A3B8; }

/* ---------- 8. Page banner (内页) ---------- */
.pbanner { position: relative; background: var(--ink); padding: 78px 0 62px; overflow: hidden; }
.pbanner__bg { position: absolute; inset: 0; opacity: .3; }
.pbanner__bg img { width: 100%; height: 100%; object-fit: cover; }
.pbanner::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(6, 12, 22, .92), rgba(9, 18, 32, .55));
}
.pbanner__in { position: relative; z-index: 2; }
.pbanner h1 { color: #fff; font-size: 36px; margin-bottom: 12px; }
.pbanner p { color: #A8B6C8; max-width: 720px; margin: 0; font-size: 15px; }
.crumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: #7E8EA4; margin-top: 20px; }
.crumb a:hover { color: #fff; }
.crumb svg { width: 11px; height: 11px; opacity: .6; }
.crumb b { color: #C8D4E2; font-weight: 500; }

/* ---------- 9. Cards / Grids ---------- */
.grid { display: grid; gap: 22px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.g5 { grid-template-columns: repeat(5, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 30px 26px; transition: .3s ease; position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 0;
  background: linear-gradient(90deg, var(--blue), var(--amber)); transition: width .35s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--sh-m); border-color: transparent; }
.card:hover::before { width: 100%; }
.card__ic {
  width: 48px; height: 48px; border-radius: var(--r); display: grid; place-items: center;
  background: var(--blue-l); color: var(--blue); margin-bottom: 18px;
}
.card__ic svg { width: 24px; height: 24px; }
.card h3 { font-size: 17.5px; margin-bottom: 10px; }
.card p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.8; }
.card--num { padding-top: 34px; }
.card__n { font-size: 13px; font-weight: 800; color: var(--amber); letter-spacing: .1em; margin-bottom: 12px; display: block; }

/* ---------- 10. Split (图文左右) ---------- */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; }
.split--form { grid-template-columns: 1fr 1.15fr; gap: 52px; align-items: start; }
.split--rev .split__media { order: -1; }
.split__media { position: relative; }
.split__media img { width: 100%; border-radius: var(--r-lg); box-shadow: var(--sh-m); object-fit: cover; }
.split__media--tall img { aspect-ratio: 4 / 3.2; }
.split h2 { font-size: 32px; margin-bottom: 18px; }
.split h3 { font-size: 19px; margin: 26px 0 10px; }
.split p { font-size: 15px; }

.badge {
  position: absolute; right: -14px; bottom: 26px; background: var(--blue); color: #fff;
  padding: 18px 24px; border-radius: var(--r-lg); box-shadow: var(--sh-l); text-align: center;
}
.badge b { display: block; font-size: 27px; font-weight: 800; line-height: 1.15; }
.badge span { font-size: 12.5px; opacity: .88; letter-spacing: .04em; }

/* checklist */
.chk { display: grid; gap: 12px; margin: 22px 0 0; }
.chk li { display: flex; gap: 12px; font-size: 14.8px; color: var(--body); align-items: flex-start; }
.chk svg { width: 19px; height: 19px; color: var(--blue); flex: none; margin-top: 4px; }
.chk b { color: var(--ink); font-weight: 700; }

/* ---------- 11. Product cards ---------- */
.pcard {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  overflow: hidden; transition: .3s ease; display: flex; flex-direction: column;
}
.pcard:hover { box-shadow: var(--sh-m); transform: translateY(-4px); border-color: transparent; }
.pcard__ph { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--bg-soft-2); }
.pcard__ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.pcard:hover .pcard__ph img { transform: scale(1.06); }
.pcard__tag {
  position: absolute; left: 14px; top: 14px; background: rgba(10, 18, 32, .82); color: #fff;
  font-size: 11.5px; font-weight: 700; letter-spacing: .08em; padding: 5px 11px; border-radius: 3px;
  backdrop-filter: blur(4px);
}
.pcard__bd { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.pcard__bd h3 { font-size: 18px; margin-bottom: 4px; }
.pcard__en { font-size: 11.5px; color: var(--muted); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 12px; font-weight: 600; }
.pcard__bd > p { font-size: 13.8px; color: var(--muted); margin: 0 0 16px; line-height: 1.8; }
.pcard__sp { display: grid; gap: 7px; margin-bottom: 18px; }
.pcard__sp li { display: flex; justify-content: space-between; gap: 12px; font-size: 13.2px; padding-bottom: 7px; border-bottom: 1px dashed var(--line); }
.pcard__sp span { color: var(--muted); flex: none; }
.pcard__sp b { color: var(--ink-3); font-weight: 600; text-align: right; }
.pcard__lk { margin-top: auto; font-size: 13.8px; font-weight: 700; color: var(--blue); display: inline-flex; align-items: center; gap: 6px; }
.pcard__lk svg { width: 13px; height: 13px; transition: transform .25s; }
.pcard:hover .pcard__lk svg { transform: translateX(4px); }

/* filter tabs */
.tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.tabs button {
  height: 40px; padding: 0 20px; border-radius: 100px; font-size: 14px; font-weight: 600;
  color: var(--body); background: #fff; border: 1px solid var(--line); transition: .22s;
}
.tabs button:hover { border-color: var(--blue); color: var(--blue); }
.tabs button.on { background: var(--blue); border-color: var(--blue); color: #fff; }

/* ---------- 12. Spec table ---------- */
.tblwrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-lg); background: #fff; }
.tbl { min-width: 640px; font-size: 14px; }
.tbl th, .tbl td { padding: 15px 20px; text-align: left; border-bottom: 1px solid var(--line-2); }
.tbl thead th { background: var(--ink); color: #fff; font-weight: 600; font-size: 13.5px; letter-spacing: .03em; white-space: nowrap; }
.tbl tbody tr:last-child td { border-bottom: 0; }
.tbl tbody tr:nth-child(even) { background: #FAFCFE; }
.tbl tbody tr:hover { background: var(--blue-l); }
.tbl td:first-child { font-weight: 700; color: var(--ink); white-space: nowrap; }
.tbl code { font-family: var(--ff); font-weight: 700; color: var(--blue); }

/* ---------- 13. Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.stats--3 { grid-template-columns: repeat(3, 1fr); }
.stats > div { background: #fff; padding: 30px 24px; text-align: center; }
.stats b { display: block; font-size: 36px; font-weight: 800; color: var(--blue); letter-spacing: -.02em; line-height: 1.15; }
.stats b i { font-style: normal; font-size: 18px; }
.stats span { font-size: 13.5px; color: var(--muted); }
.sec--ink .stats { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .1); }
.sec--ink .stats > div { background: transparent; }
.sec--ink .stats b { color: #FFB459; }
.sec--ink .stats span { color: #8B9BB0; }

/* ---------- 14. Application cards ---------- */
.acard {
  position: relative; border-radius: var(--r-lg); overflow: hidden; background: var(--ink);
  min-height: 220px; display: flex; align-items: flex-end; padding: 24px; transition: .35s;
}
.acard img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .42; transition: .5s; }
.acard::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(6, 12, 22, .95) 10%, rgba(6, 12, 22, .25) 70%); }
.acard > div { position: relative; z-index: 2; }
.acard h3 { color: #fff; font-size: 17px; margin-bottom: 6px; }
.acard p { color: #A8B6C8; font-size: 13.2px; margin: 0; line-height: 1.7; }
.acard:hover { transform: translateY(-4px); box-shadow: var(--sh-m); }
.acard:hover img { opacity: .6; transform: scale(1.05); }
.acard__n {
  position: absolute; right: 18px; top: 16px; z-index: 2; font-size: 12px; font-weight: 800;
  color: rgba(255, 255, 255, .5); letter-spacing: .1em;
}

/* 应用领域无图列表版 */
.alist { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; background: #fff; }
.alist > article { padding: 28px; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); transition: background .25s; }
.alist > article:nth-child(2n) { border-right: 0; }
.alist > article:hover { background: var(--bg-soft); }
.alist h3 { font-size: 17px; display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.alist h3 i {
  font-style: normal; width: 26px; height: 26px; border-radius: 50%; background: var(--blue-l); color: var(--blue);
  font-size: 12px; font-weight: 800; display: grid; place-items: center; flex: none;
}
.alist p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.8; }

/* ---------- 15. Process / Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: s; }
.steps > li { position: relative; padding-top: 54px; }
.steps > li::before {
  counter-increment: s; content: "0" counter(s);
  position: absolute; left: 0; top: 0; font-size: 34px; font-weight: 800;
  color: var(--bg-soft-2); letter-spacing: -.02em; line-height: 1;
}
.steps > li::after {
  content: ""; position: absolute; left: 0; top: 44px; width: 34px; height: 2px; background: var(--amber);
}
.steps h4 { font-size: 16px; margin-bottom: 8px; }
.steps p { font-size: 13.5px; color: var(--muted); margin: 0; line-height: 1.75; }

/* ---------- 16. News ---------- */
.ncard { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; transition: .3s; display: flex; flex-direction: column; height: 100%; }
.ncard:hover { box-shadow: var(--sh-m); transform: translateY(-4px); border-color: transparent; }
.ncard__ph { aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-soft-2); }
.ncard__ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.ncard:hover .ncard__ph img { transform: scale(1.05); }
.ncard__bd { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.ncard__meta { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--muted); margin-bottom: 12px; }
.ncard__meta em { font-style: normal; background: var(--blue-l); color: var(--blue); font-weight: 700; padding: 3px 9px; border-radius: 3px; font-size: 11.5px; }
.ncard h3 { font-size: 16.5px; line-height: 1.5; margin-bottom: 10px; transition: color .2s; }
.ncard:hover h3 { color: var(--blue); }
.ncard p {
  font-size: 13.5px; color: var(--muted); margin: 0 0 16px; line-height: 1.8;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.ncard__lk { margin-top: auto; font-size: 13px; font-weight: 700; color: var(--blue); }

/* 新闻列表（list 版） */
.nlist { border-top: 1px solid var(--line); }
.nlist > a { display: grid; grid-template-columns: 92px 1fr auto; gap: 24px; align-items: center; padding: 26px 4px; border-bottom: 1px solid var(--line); transition: .25s; }
.nlist > a:hover { background: var(--bg-soft); padding-left: 16px; padding-right: 16px; }
.ndate { text-align: center; border-right: 1px solid var(--line); padding-right: 20px; }
.ndate b { display: block; font-size: 26px; font-weight: 800; color: var(--blue); line-height: 1.1; }
.ndate span { font-size: 12px; color: var(--muted); }
.nlist h3 { font-size: 16.5px; margin-bottom: 6px; transition: color .2s; }
.nlist a:hover h3 { color: var(--blue); }
.nlist p { font-size: 13.5px; color: var(--muted); margin: 0; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.nlist__more { font-size: 13px; font-weight: 700; color: var(--blue); white-space: nowrap; }

/* ---------- 17. CTA band ---------- */
.cta { position: relative; background: var(--ink); overflow: hidden; }
.cta__bg { position: absolute; inset: 0; opacity: .22; }
.cta__bg img { width: 100%; height: 100%; object-fit: cover; }
.cta::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6, 12, 22, .96), rgba(13, 68, 153, .55)); }
.cta__in { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 64px 24px; max-width: var(--maxw); margin: 0 auto; flex-wrap: wrap; }
.cta h2 { color: #fff; font-size: 30px; margin-bottom: 12px; }
.cta p { color: #A8B6C8; margin: 0; font-size: 15px; max-width: 620px; }
.cta__btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 18. Contact ---------- */
.ctgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.ctcard { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 32px 26px; text-align: center; transition: .3s; }
.ctcard:hover { box-shadow: var(--sh-m); transform: translateY(-4px); }
.ctcard__ic { width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 50%; background: var(--blue-l); color: var(--blue); display: grid; place-items: center; }
.ctcard__ic svg { width: 24px; height: 24px; }
.ctcard h3 { font-size: 15px; color: var(--muted); font-weight: 600; margin-bottom: 8px; letter-spacing: .04em; }
.ctcard b { display: block; font-size: 19px; color: var(--ink); font-weight: 800; line-height: 1.5; word-break: break-all; }
.ctcard p { font-size: 13.5px; color: var(--muted); margin: 6px 0 0; }

.form { display: grid; gap: 16px; }
.f2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.fld { display: flex; flex-direction: column; gap: 7px; }
.fld label { font-size: 13.5px; font-weight: 600; color: var(--ink-3); }
.fld label i { color: #D64545; font-style: normal; }
.fld input, .fld select, .fld textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: var(--r); font-size: 14.5px; background: #fff; transition: .2s;
}
.fld textarea { min-height: 118px; resize: vertical; }
.fld input:focus, .fld select:focus, .fld textarea:focus {
  border-color: var(--blue); box-shadow: 0 0 0 3px rgba(21, 96, 212, .1); outline: none;
}
.formnote { font-size: 12.5px; color: var(--muted); margin: 0; }
.formmsg { display: none; padding: 12px 16px; border-radius: var(--r); font-size: 14px; background: #E7F6EC; color: #1B7A3D; border: 1px solid #BFE7CD; }
.formmsg.on { display: block; }
.formerr { display: none; padding: 12px 16px; border-radius: var(--r); font-size: 14px; background: #FDECEC; color: #B02A2A; border: 1px solid #F3C6C6; }
.formerr.on { display: block; }

/* 字段级错误提示 */
.ferr { display: none; font-size: 12.5px; color: #D64545; line-height: 1.5; }
.ferr.on { display: block; }
.fld.is-err input, .fld.is-err select, .fld.is-err textarea { border-color: #D64545; }
.fld.is-err input:focus, .fld.is-err select:focus, .fld.is-err textarea:focus {
  box-shadow: 0 0 0 3px rgba(214, 69, 69, .12);
}

/* 蜜罐字段：对用户不可见，但不使用 display:none（部分机器人会跳过隐藏元素） */
.hp { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }

/* 提交按钮加载态 */
.btn.is-busy { pointer-events: none; opacity: .72; }
.btn.is-busy .btn__tx::after {
  content: ""; display: inline-block; width: 12px; height: 12px; margin-left: 8px;
  border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%;
  vertical-align: -2px; animation: btnspin .7s linear infinite;
}
@keyframes btnspin { to { transform: rotate(360deg); } }

/* map */
.mapbox { border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; background: var(--bg-soft-2); min-height: 320px; display: grid; place-items: center; text-align: center; padding: 40px; }
.mapbox b { display: block; color: var(--ink); font-size: 16px; margin-bottom: 6px; }
.mapbox p { font-size: 13.5px; color: var(--muted); margin: 0; }

/* ---------- 19. Footer ---------- */
.ftr { background: var(--ink); color: #8B9BB0; font-size: 14px; padding-top: 66px; }
.ftr__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 44px; padding-bottom: 50px; }
.ftr__top h4 { color: #fff; font-size: 15px; margin-bottom: 20px; letter-spacing: .04em; }
.ftr__top li { margin-bottom: 11px; }
.ftr a:hover { color: #fff; }
.ftr .logo__t strong { color: #fff; }
.ftr__desc { font-size: 13.5px; line-height: 1.9; margin: 18px 0 0; color: #7E8EA4; max-width: 340px; }
.ftr__ct li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 13px; font-size: 13.8px; }
.ftr__ct svg { width: 15px; height: 15px; color: var(--amber); flex: none; margin-top: 5px; }
.ftr__ct b { color: #C8D4E2; font-weight: 600; }
.qr { width: 112px; height: 112px; border-radius: var(--r); background: #fff; padding: 8px; }
.qr img, .qr svg { width: 100%; height: 100%; }
.ftr__qr { display: flex; gap: 16px; align-items: flex-start; margin-top: 20px; }
.ftr__qr span { font-size: 12.5px; color: #7E8EA4; }
.ftr__bar { border-top: 1px solid rgba(255, 255, 255, .1); padding: 22px 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; }
.ftr__bar a:hover { color: #fff; }
.ftr__links { display: flex; gap: 20px; flex-wrap: wrap; }

/* ---------- 20. Back to top ---------- */
.totop {
  position: fixed; right: 22px; bottom: 22px; z-index: 80;
  width: 46px; height: 46px; border-radius: 50%; background: var(--blue); color: #fff;
  display: grid; place-items: center; box-shadow: 0 8px 22px rgba(21, 96, 212, .35);
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: .3s;
}
.totop.on { opacity: 1; visibility: visible; transform: none; }
.totop svg { width: 19px; height: 19px; }
.totop:hover { background: var(--blue-d); }

/* side contact dock */
.dock { position: fixed; right: 0; top: 50%; transform: translateY(-50%); z-index: 70; display: flex; flex-direction: column; gap: 2px; }
.dock a, .dock button {
  width: 52px; height: 52px; background: var(--ink-2); color: #fff; display: grid; place-items: center;
  transition: .25s; position: relative;
}
.dock a:hover, .dock button:hover { background: var(--blue); }
.dock svg { width: 20px; height: 20px; }
.dock a:first-child { border-radius: 6px 0 0 0; }
.dock a:last-child, .dock button:last-child { border-radius: 0 0 0 6px; }
.dock__tip {
  position: absolute; right: 100%; top: 50%; transform: translateY(-50%) translateX(-6px);
  background: var(--ink); color: #fff; font-size: 13px; padding: 9px 14px; border-radius: var(--r);
  white-space: nowrap; opacity: 0; visibility: hidden; transition: .25s; pointer-events: none;
}
.dock a:hover .dock__tip, .dock button:hover .dock__tip { opacity: 1; visibility: visible; transform: translateY(-50%) translateX(-12px); }

/* ---------- 21. Reveal animation（渐进增强：无 JS 时内容默认可见） ---------- */
.rv { transition: opacity .7s ease, transform .7s cubic-bezier(.22, .61, .36, 1); }
.js .rv { opacity: 0; transform: translateY(24px); }
.js .rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .rv { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 22. Utilities ---------- */
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--blue); color: #fff; padding: 12px 20px; border-radius: 0 0 var(--r) 0;
  font-size: 14px; font-weight: 600;
}
.skip:focus { left: 0; }
.mt0 { margin-top: 0; } .mb0 { margin-bottom: 0; }
.mt24 { margin-top: 24px; } .mt40 { margin-top: 40px; } .mt56 { margin-top: 56px; }
.tc { text-align: center; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 100px; font-size: 12.5px; font-weight: 600; background: var(--bg-soft-2); color: var(--body); }
.pill--blue { background: var(--blue-l); color: var(--blue); }
.pill--amber { background: var(--amber-l); color: var(--amber); }
.hr { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---------- 22b. 文章详情页 ---------- */
.artwrap { display: grid; grid-template-columns: 1fr 320px; gap: 52px; align-items: start; }
.art { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 44px 48px 48px; }
.art__meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.art__meta em { font-style: normal; background: var(--blue-l); color: var(--blue); font-weight: 700; padding: 4px 11px; border-radius: 3px; font-size: 12px; }
.art h1 { font-size: 30px; line-height: 1.4; margin-bottom: 18px; }
.art__lead {
  font-size: 16px; line-height: 1.9; color: var(--ink-3); background: var(--bg-soft);
  border-left: 3px solid var(--blue); padding: 16px 20px; border-radius: 0 var(--r) var(--r) 0; margin-bottom: 32px;
}
.art__fig { margin: 0 0 32px; }
.art__fig img { width: 100%; border-radius: var(--r-lg); }
.art__fig figcaption { font-size: 12.5px; color: var(--muted); padding-top: 10px; text-align: center; }
.art h2 { font-size: 22px; margin: 40px 0 16px; padding-left: 14px; border-left: 3px solid var(--amber); }
.art h3 { font-size: 18px; margin: 28px 0 12px; }
.art p { font-size: 15.2px; line-height: 1.95; margin-bottom: 18px; }
.art ul { list-style: disc; padding-left: 22px; margin-bottom: 18px; }
.art ul li { font-size: 15px; line-height: 1.9; margin-bottom: 6px; }
.art ol { list-style: decimal; padding-left: 22px; margin-bottom: 18px; }
.art ol li { font-size: 15px; line-height: 1.9; margin-bottom: 6px; }
.art .art__note {
  background: var(--amber-l); border: 1px solid #F2DCBF; color: #8A5410;
  border-radius: var(--r); padding: 14px 18px; font-size: 14px; line-height: 1.8; margin: 24px 0;
}
.art table { font-size: 14px; margin: 8px 0 24px; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.art th, .art td { padding: 12px 16px; border-bottom: 1px solid var(--line-2); text-align: left; }
.art th { background: var(--bg-soft); color: var(--ink); font-weight: 700; }
.art tbody tr:last-child td { border-bottom: 0; }
.side { display: grid; gap: 22px; position: sticky; top: calc(var(--hdr-h) + 24px); }
.side__card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 26px 24px; }
.side__card h3 { font-size: 15.5px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--line-2); }
.side__card h3 span { font-size: 12px; color: var(--muted); font-weight: 500; }
.relate { display: grid; gap: 14px; }
.relate a { display: block; font-size: 14px; line-height: 1.6; color: var(--body); padding-bottom: 12px; border-bottom: 1px dashed var(--line-2); }
.relate a:last-child { border-bottom: 0; padding-bottom: 0; }
.relate a:hover { color: var(--blue); }
.relate time { display: block; font-size: 12px; color: var(--muted); margin-top: 3px; }
.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 40px; }
.prevnext a {
  display: block; background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 18px 22px; font-size: 14px; color: var(--body); transition: .25s;
}
.prevnext a:hover { background: #fff; border-color: var(--blue); color: var(--blue); box-shadow: var(--sh-s); }
.prevnext a span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }

/* ---------- 22c. 404 ---------- */
.nf { text-align: center; padding: 90px 24px 70px; }
.nf b { display: block; font-size: 100px; font-weight: 800; color: var(--bg-soft-2); line-height: 1; letter-spacing: -.04em; }
.nf h1 { font-size: 26px; margin: 8px 0 14px; }
.nf p { color: var(--muted); max-width: 520px; margin: 0 auto 30px; }
.nf__btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

@media (max-width: 1080px) {
  .artwrap { grid-template-columns: 1fr; gap: 36px; }
  .side { position: static; }
}
@media (max-width: 820px) {
  .art { padding: 28px 22px 32px; }
  .art h1 { font-size: 23px; }
  .art h2 { font-size: 19px; }
  .nf b { font-size: 68px; }
  .nf { padding: 56px 18px 44px; }
}

/* ---------- 22d. 材料选型助手 ---------- */
.sel { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.sel__grid { display: grid; grid-template-columns: 1.05fr 1fr; }
.sel__form { padding: 34px 34px 30px; border-right: 1px solid var(--line); }
.sel__form h3 { font-size: 17px; margin-bottom: 4px; }
.sel__form > p { font-size: 13.5px; color: var(--muted); margin: 0 0 26px; }
.sel__grp { margin-bottom: 26px; }
.sel__grp > label { display: block; font-size: 13.5px; font-weight: 700; color: var(--ink); margin-bottom: 12px; }
.sel__grp > label i { font-style: normal; color: var(--muted); font-weight: 500; font-size: 12.5px; margin-left: 6px; }

.sel__temp { display: flex; align-items: center; gap: 16px; }
.sel__temp input[type=range] { flex: 1; -webkit-appearance: none; appearance: none; height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--blue) 0 var(--p, 40%), var(--bg-soft-2) var(--p, 40%) 100%); outline: none; }
.sel__temp input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 3px solid var(--blue); cursor: pointer; box-shadow: 0 2px 8px rgba(21, 96, 212, .3); }
.sel__temp input[type=range]::-moz-range-thumb { width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--blue); cursor: pointer; }
.sel__tempout { min-width: 96px; text-align: center; background: var(--blue-l); color: var(--blue); border-radius: var(--r); padding: 8px 10px; font-weight: 800; font-size: 16px; }
.sel__tempout small { display: block; font-size: 10.5px; font-weight: 600; opacity: .8; letter-spacing: .04em; }

.chips { display: flex; flex-wrap: wrap; gap: 9px; }
.chips button {
  padding: 8px 15px; border-radius: 100px; font-size: 13.5px; font-weight: 600;
  background: var(--bg-soft); color: var(--body); border: 1px solid var(--line); transition: .2s;
}
.chips button:hover { border-color: var(--blue); color: var(--blue); }
.chips button.on { background: var(--blue); border-color: var(--blue); color: #fff; }

.seg { display: flex; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.seg button { flex: 1; padding: 11px 8px; font-size: 13.5px; font-weight: 600; color: var(--body); background: #fff; border-right: 1px solid var(--line); transition: .2s; }
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--ink); color: #fff; }

.sel__res { padding: 34px 34px 30px; background: var(--bg-soft); }
.sel__res h3 { font-size: 17px; margin-bottom: 4px; }
.sel__res > p { font-size: 13.5px; color: var(--muted); margin: 0 0 22px; }
.sres { display: grid; gap: 12px; }
.sres__i { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 18px 20px; transition: .25s; }
.sres__i:hover { border-color: var(--blue); box-shadow: var(--sh-s); }
.sres__top { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.sres__top b { font-size: 18px; color: var(--ink); }
.sres__top small { font-size: 12px; color: var(--muted); }
.sres__bar { margin-left: auto; width: 96px; }
.sres__bar span { display: block; height: 6px; border-radius: 6px; background: var(--bg-soft-2); overflow: hidden; }
.sres__bar span i { display: block; height: 100%; border-radius: 6px; background: linear-gradient(90deg, var(--blue), var(--amber)); transition: width .5s ease; }
.sres__bar b { display: block; font-size: 12px; color: var(--blue); text-align: right; margin-top: 4px; }
.sres__tags { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 10px; }
.sres__tags span { font-size: 12px; padding: 3px 10px; border-radius: 100px; background: var(--blue-l); color: var(--blue); font-weight: 600; }
.sres__tags span.warn { background: var(--amber-l); color: #A8651A; }
.sres__why { font-size: 13.2px; color: var(--muted); line-height: 1.75; margin: 0; }
.sres__why b { color: var(--ink); font-weight: 600; }
.sres__empty { font-size: 14px; color: var(--muted); text-align: center; padding: 30px 10px; }
.sel__cta { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.sel__cta .btn { flex: 1; min-width: 160px; }

@media (max-width: 1080px) {
  .sel__grid { grid-template-columns: 1fr; }
  .sel__form { border-right: 0; border-bottom: 1px solid var(--line); }
  .sel__form, .sel__res { padding: 26px 22px 24px; }
}

/* ---------- 23. Responsive ---------- */
@media (max-width: 1300px) {
  .nav > li > a { padding: 0 10px; font-size: 14px; }
  .nav > li > a::after { left: 10px; right: 10px; }
  .hdr__tel { display: none; }
  .hero h1 { font-size: 40px; }
  .sec-head h2, .split h2 { font-size: 30px; }
}

@media (max-width: 1180px) {
  .nav, .hdr__cta .btn { display: none; }
  .burger { display: flex; }
  .dock { display: none; }
  .g4, .g5 { grid-template-columns: repeat(2, 1fr); }
  .g3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 26px 18px; }
  .split, .split--form { grid-template-columns: 1fr; gap: 36px; }
  .split--rev .split__media { order: 0; }
  .split__media--tall img { aspect-ratio: 16 / 10; }
  .ftr__top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .hero__in { padding: 96px 0 84px; }
  .stats--3 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 820px) {
  .sec { padding: 62px 0; }
  .hero__bar ul { grid-template-columns: repeat(2, 1fr); }
  .hero__bar li { padding: 20px; }
  .hero__bar li:nth-child(2n) { border-right: 0; }
  .hero__bar li:nth-child(-n+2) { border-bottom: 1px solid rgba(255, 255, 255, .08); }
  .hero h1 { font-size: 32px; }
  .hero__sub { font-size: 15px; }
  .pbanner { padding: 56px 0 46px; }
  .pbanner h1 { font-size: 27px; }
  .sec-head h2, .split h2 { font-size: 25px; }
  .sec-head { margin-bottom: 34px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .ctgrid { grid-template-columns: 1fr; }
  .alist { grid-template-columns: 1fr; }
  .alist > article { border-right: 0; }
  .cta__in { padding: 48px 24px; }
  .cta h2 { font-size: 24px; }
  .nlist > a { grid-template-columns: 1fr; gap: 10px; }
  .ndate { border-right: 0; padding-right: 0; text-align: left; display: flex; align-items: baseline; gap: 7px; }
  .ndate b { font-size: 20px; }
  .nlist__more { display: none; }
  .topbar__l { gap: 14px; font-size: 12px; }
  .topbar__r { display: none; }
  .badge { right: 14px; bottom: 14px; padding: 13px 18px; }
  .badge b { font-size: 21px; }
}

@media (max-width: 620px) {
  .wrap { padding: 0 18px; }
  .g2, .g3, .g4, .g5 { grid-template-columns: 1fr; }
  .f2 { grid-template-columns: 1fr; }
  .flds2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .ftr__top { grid-template-columns: 1fr; gap: 30px; }
  .hero h1 { font-size: 27px; }
  .hero__in { padding: 74px 0 62px; }
  .hero__pts span { font-size: 12.5px; padding: 5px 11px; }
  .hero__btns .btn { width: 100%; }
  .logo__t strong { font-size: 15.5px; }
  .logo__t span { font-size: 9px; letter-spacing: .08em; }
  .logo__mark { width: 34px; height: 34px; }
  .logo__img { height: 30px; }
  .sec { padding: 52px 0; }
  .card { padding: 26px 20px; }
  .ftr__bar { flex-direction: column; align-items: flex-start; gap: 10px; }
}