/* ============================================================
   华泉新材料 v2 — 米白纸感 · 墨绿 · 金铜 · 杂志编辑风
   ============================================================ */
:root {
  --paper: #FAF9F6;
  --paper-2: #F2EFE8;
  --ink: #17150F;
  --ink-2: #4A463C;
  --ink-3: #8B8574;
  --pine: #0E3A32;
  --pine-2: #16594A;
  --gold: #B99855;
  --gold-l: #D8C39A;
  --line: #E6E1D5;
  --white: #FFFFFF;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--paper); color: var(--ink);
  line-height: 1.75; -webkit-font-smoothing: antialiased;
}
.serif { font-family: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", Georgia, serif; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 26px; }

/* ---------- 信息栏 ---------- */
.infobar { background: var(--pine); color: #C9D6CE; font-size: 13px; padding: 8px 0; }
.infobar .wrap { display: flex; justify-content: space-between; align-items: center; }
.infobar a { color: var(--gold-l); font-weight: 700; letter-spacing: .5px; }
.infobar .sep { margin: 0 10px; opacity: .4; }

/* ---------- 导航 ---------- */
header.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,249,246,.94); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
header.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.logo { display: flex; align-items: center; gap: 13px; }
.logo .mark {
  width: 46px; height: 46px; border-radius: 4px;
  background: var(--pine); color: var(--gold-l);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 18px; letter-spacing: 1px;
}
.logo .name { font-size: 19px; font-weight: 800; color: var(--pine); line-height: 1.25; }
.logo .name small { display: block; font-size: 10.5px; font-weight: 500; color: var(--ink-3); letter-spacing: 2.5px; }
nav.menu { display: flex; gap: 4px; }
nav.menu a {
  padding: 10px 17px; font-size: 15px; font-weight: 600; color: var(--ink-2);
  position: relative; transition: color .2s;
}
nav.menu a::after {
  content: ""; position: absolute; left: 17px; right: 17px; bottom: 5px; height: 2px;
  background: var(--gold); transform: scaleX(0); transition: transform .25s;
}
nav.menu a:hover, nav.menu a.active { color: var(--pine); }
nav.menu a:hover::after, nav.menu a.active::after { transform: scaleX(1); }
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 28px; font-weight: 700; font-size: 15px;
  cursor: pointer; border: none; transition: all .25s; border-radius: 2px;
}
.btn-pine { background: var(--pine); color: #F2EFE6; }
.btn-pine:hover { background: var(--pine-2); transform: translateY(-2px); }
.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: #A98944; transform: translateY(-2px); }
.btn-line { background: transparent; color: var(--pine); border: 1.5px solid var(--pine); }
.btn-line:hover { background: var(--pine); color: #F2EFE6; }
.btn-line-w { background: transparent; color: #F2EFE6; border: 1.5px solid rgba(242,239,230,.55); }
.btn-line-w:hover { border-color: var(--gold-l); color: var(--gold-l); }
.nav-toggle { display: none; background: none; border: none; font-size: 26px; color: var(--pine); cursor: pointer; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 110px 0 96px; background: var(--paper); }
.hero .ghost {
  position: absolute; right: -30px; bottom: -55px;
  font-size: 200px; font-weight: 800; letter-spacing: 8px; line-height: 1;
  color: transparent; -webkit-text-stroke: 1px var(--line);
  user-select: none; pointer-events: none;
}
.hero .wrap { position: relative; z-index: 2; }
.kicker {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: 13px; font-weight: 700; letter-spacing: 3.5px; color: var(--gold);
}
.kicker::before { content: ""; width: 42px; height: 1.5px; background: var(--gold); }
.hero h1 {
  font-size: 58px; line-height: 1.22; font-weight: 800; color: var(--ink);
  margin: 26px 0 8px; letter-spacing: 2px;
}
.hero h1 em { font-style: normal; color: var(--pine); position: relative; }
.hero h1 em::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 6px; height: 12px;
  background: var(--gold-l); opacity: .45; z-index: -1;
}
.hero p.sub { max-width: 640px; font-size: 17px; color: var(--ink-2); margin: 22px 0 38px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  margin-top: 66px; border-top: 1px solid var(--line);
}
.hero-stats .st { padding: 26px 26px 4px 0; border-right: 1px solid var(--line); }
.hero-stats .st:last-child { border-right: none; }
.hero-stats b { display: block; font-size: 40px; font-weight: 800; color: var(--pine); font-family: Georgia, "Noto Serif SC", serif; }
.hero-stats span { font-size: 13.5px; color: var(--ink-3); letter-spacing: 1px; }

/* ---------- 跑马信任条 ---------- */
.marquee { background: var(--pine); color: #C9D6CE; overflow: hidden; padding: 15px 0; }
.marquee .track { display: flex; gap: 64px; width: max-content; animation: scroll 32s linear infinite; font-size: 13.5px; letter-spacing: 1px; white-space: nowrap; }
.marquee b { color: var(--gold-l); font-weight: 700; }
.marquee i { font-style: normal; color: var(--gold); }
@keyframes scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- 区块 ---------- */
section.sec { padding: 100px 0; }
section.sec.tint { background: var(--paper-2); }
.sec-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; margin-bottom: 60px; }
.sec-head h2 { font-size: 38px; font-weight: 800; color: var(--ink); line-height: 1.3; letter-spacing: 1.5px; margin-top: 14px; }
.sec-head .right { max-width: 380px; color: var(--ink-2); font-size: 15px; padding-bottom: 6px; }

/* ---------- 产品行 ---------- */
.plist { border-top: 1px solid var(--line); }
.p-row {
  display: grid; grid-template-columns: 90px 300px 1fr 150px 30px;
  gap: 26px; align-items: center;
  padding: 30px 10px; border-bottom: 1px solid var(--line);
  transition: all .25s; position: relative;
}
.p-row:hover { background: var(--white); box-shadow: 0 14px 40px rgba(23,21,15,.07); }
.p-row .no { font-family: Georgia, serif; font-size: 15px; color: var(--gold); letter-spacing: 2px; }
.p-row h3 { font-size: 21px; font-weight: 800; color: var(--pine); letter-spacing: .5px; }
.p-row .en { font-size: 11px; color: var(--ink-3); letter-spacing: 1.5px; margin-top: 3px; }
.p-row p { font-size: 14px; color: var(--ink-2); }
.p-row .spec { font-size: 12.5px; color: var(--pine-2); font-weight: 700; background: var(--paper-2); padding: 8px 14px; border-radius: 2px; text-align: center; line-height: 1.5; }
.p-row .arrow { color: var(--gold); font-size: 20px; transition: transform .25s; }
.p-row:hover .arrow { transform: translateX(6px); }

/* ---------- 应用场景 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); background: var(--white); }
.a-card { padding: 36px 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: all .25s; }
.a-card:hover { background: var(--pine); }
.a-card:hover * { color: #E9EFE9; }
.a-card:hover .no { color: var(--gold-l); }
.a-card:hover .combo { color: var(--gold-l); border-color: rgba(216,195,154,.4); }
.a-card .no { font-family: Georgia, serif; font-size: 13px; color: var(--gold); letter-spacing: 2px; }
.a-card h3 { font-size: 18px; font-weight: 800; color: var(--ink); margin: 10px 0 8px; transition: color .25s; }
.a-card p { font-size: 13.5px; color: var(--ink-2); min-height: 66px; transition: color .25s; }
.a-card .combo {
  display: inline-block; margin-top: 10px; font-size: 12.5px; font-weight: 700;
  color: var(--pine-2); border: 1px solid var(--line); padding: 6px 12px; border-radius: 2px;
  transition: all .25s;
}

/* ---------- 计算器 ---------- */
.calc-sec { background: var(--pine); color: #EDEFE8; padding: 96px 0; }
.calc-sec .kicker { color: var(--gold-l); }
.calc-sec .kicker::before { background: var(--gold-l); }
.calc-sec h2 { font-size: 34px; font-weight: 800; margin: 14px 0 10px; letter-spacing: 1.5px; }
.calc-sec .lead { color: #A7BDB0; max-width: 620px; margin-bottom: 48px; font-size: 15.5px; }
.calc { display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; }
.calc-tabs { display: flex; gap: 0; margin-bottom: 30px; border: 1px solid rgba(216,195,154,.35); border-radius: 2px; overflow: hidden; }
.calc-tabs button {
  flex: 1; padding: 14px; background: transparent; border: none; cursor: pointer;
  color: #A7BDB0; font-size: 15px; font-weight: 700; letter-spacing: 1px; transition: all .2s;
}
.calc-tabs button.on { background: var(--gold); color: #fff; }
.f-row { margin-bottom: 18px; }
.f-row label { display: block; font-size: 13px; color: #A7BDB0; margin-bottom: 8px; letter-spacing: 1px; }
.f-row input, .f-row select {
  width: 100%; padding: 13px 15px; font-size: 15px;
  background: rgba(255,255,255,.06); border: 1px solid rgba(216,195,154,.3);
  border-radius: 2px; color: #F2EFE6; outline: none; transition: border .2s;
}
.f-row input:focus, .f-row select:focus { border-color: var(--gold-l); }
.f-row select option { color: var(--ink); }
.f-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.calc-note { font-size: 12px; color: #7E9A8C; margin-top: 14px; line-height: 1.7; }
.calc-out { border-left: 1px solid rgba(216,195,154,.3); padding-left: 54px; }
.calc-out h4 { font-size: 14px; letter-spacing: 3px; color: var(--gold-l); margin-bottom: 22px; font-weight: 700; }
.out-row { display: flex; justify-content: space-between; align-items: baseline; padding: 14px 0; border-bottom: 1px solid rgba(216,195,154,.15); }
.out-row span { color: #A7BDB0; font-size: 14px; }
.out-row b { font-size: 24px; color: #F2EFE6; font-family: Georgia, serif; }
.out-row b small { font-size: 13px; color: #7E9A8C; margin-left: 5px; font-family: inherit; }
.out-row b.hi { color: var(--gold-l); font-size: 30px; }
.calc-out .cta-row { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.case-card { background: var(--white); border: 1px solid var(--line); padding: 36px 30px; transition: all .25s; }
.case-card:hover { transform: translateY(-5px); box-shadow: 0 18px 44px rgba(23,21,15,.09); }
.case-card .ind { font-size: 12.5px; font-weight: 700; letter-spacing: 2px; color: var(--gold); }
.case-card h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin: 12px 0 22px; line-height: 1.5; }
.case-nums { display: flex; gap: 0; border-top: 1px solid var(--line); margin-bottom: 20px; }
.case-nums div { flex: 1; padding: 16px 8px 0; }
.case-nums b { display: block; font-size: 26px; font-family: Georgia, serif; color: var(--pine); }
.case-nums span { font-size: 12px; color: var(--ink-3); }
.case-card p { font-size: 13.5px; color: var(--ink-2); }

/* ---------- 优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.adv { border-top: 3px solid var(--pine); background: var(--white); border-right: 1px solid var(--line); padding: 30px 26px; transition: all .25s; }
.adv:hover { border-top-color: var(--gold); transform: translateY(-4px); box-shadow: 0 14px 36px rgba(23,21,15,.08); }
.adv .ic { width: 46px; height: 46px; color: var(--pine); margin-bottom: 20px; }
.adv .ic svg { width: 100%; height: 100%; }
.adv h3 { font-size: 17px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.adv p { font-size: 13.5px; color: var(--ink-2); }

/* ---------- 新闻（编辑风列表） ---------- */
.news-list { border-top: 1px solid var(--line); }
.news-row {
  display: grid; grid-template-columns: 130px 110px 1fr 100px; gap: 26px; align-items: center;
  padding: 26px 10px; border-bottom: 1px solid var(--line); transition: all .2s;
}
.news-row:hover { background: var(--white); }
.news-row .date { font-family: Georgia, serif; font-size: 15px; color: var(--ink-3); }
.news-row .cat { font-size: 12px; font-weight: 700; color: var(--gold); letter-spacing: 1px; }
.news-row h3 { font-size: 17px; font-weight: 700; color: var(--ink); }
.news-row h3:hover { color: var(--pine-2); }
.news-row .arr { color: var(--gold); text-align: right; }

/* ---------- FAQ ---------- */
.faq { max-width: 880px; }
.faq details { border-bottom: 1px solid var(--line); padding: 24px 6px; }
.faq summary {
  font-size: 17px; font-weight: 700; color: var(--ink); cursor: pointer;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 20px;
}
.faq summary::after { content: "+"; font-size: 26px; color: var(--gold); font-weight: 300; flex: none; }
.faq details[open] summary::after { content: "−"; }
.faq .ans { margin-top: 14px; font-size: 14.5px; color: var(--ink-2); max-width: 780px; }

/* ---------- CTA ---------- */
.cta-sec { background: var(--pine); color: #EDEFE8; padding: 96px 0; }
.cta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.cta-grid h2 { font-size: 38px; font-weight: 800; line-height: 1.35; margin: 16px 0 18px; letter-spacing: 1.5px; }
.cta-grid .lead { color: #A7BDB0; margin-bottom: 30px; font-size: 15.5px; }
.cta-list li { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 15px; color: #C9D6CE; font-size: 15px; }
.cta-list .tick { width: 22px; height: 22px; flex: none; color: var(--gold-l); margin-top: 3px; }
.cta-form { background: var(--white); color: var(--ink); padding: 40px; border-radius: 2px; box-shadow: 0 30px 80px rgba(0,0,0,.25); }
.cta-form h3 { font-size: 20px; font-weight: 800; color: var(--pine); margin-bottom: 6px; }
.cta-form .hint { font-size: 13px; color: var(--ink-3); margin-bottom: 24px; }
.cta-form .f-row input, .cta-form .f-row select, .cta-form .f-row textarea {
  background: var(--paper); border: 1px solid var(--line); color: var(--ink);
}
.cta-form textarea { resize: vertical; min-height: 86px; font-family: inherit; }
.form-ok { display: none; margin-top: 14px; background: #EFF6EE; border: 1px solid #2F7D4F; color: #2F7D4F; padding: 12px 16px; font-size: 14px; border-radius: 2px; }

/* ---------- 页脚 ---------- */
footer { background: #0A2A24; color: #8FA79B; padding: 70px 0 0; font-size: 14px; }
.f-grid4 { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; padding-bottom: 52px; }
.f-grid4 h4 { color: #EDEFE8; font-size: 15px; margin-bottom: 18px; letter-spacing: 1px; }
.f-grid4 li { margin-bottom: 11px; }
.f-grid4 a:hover { color: var(--gold-l); }
.f-about p { line-height: 1.9; }
.f-contact b { color: #C9D6CE; font-weight: 600; }
.f-contact a { color: var(--gold-l); font-weight: 700; }
.f-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; font-size: 12.5px; }
.f-bottom .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- 入场动画 ---------- */
.rv { opacity: 0; transform: translateY(24px); transition: all .8s cubic-bezier(.2,.7,.3,1); }
.rv.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero h1 { font-size: 42px; }
  .p-row { grid-template-columns: 60px 1fr 130px 26px; }
  .p-row p { display: none; }
  .calc { grid-template-columns: 1fr; }
  .calc-out { border-left: none; padding-left: 0; border-top: 1px solid rgba(216,195,154,.3); padding-top: 34px; }
  .app-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats .st:nth-child(2) { border-right: none; }
  .hero-stats .st:nth-child(1), .hero-stats .st:nth-child(2) { border-bottom: 1px solid var(--line); }
  .f-grid4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .hero { padding: 72px 0 64px; }
  .hero h1 { font-size: 34px; }
  nav.menu { display: none; position: absolute; top: 74px; left: 0; right: 0; background: var(--paper); flex-direction: column; padding: 14px 26px 22px; border-bottom: 1px solid var(--line); box-shadow: 0 20px 50px rgba(23,21,15,.12); }
  nav.menu.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
  .app-grid, .case-grid, .adv-grid, .f-grid { grid-template-columns: 1fr; }
  .f-grid4 { grid-template-columns: 1fr; gap: 28px; }
  section.sec { padding: 64px 0; }
  .sec-head { flex-direction: column; align-items: flex-start; gap: 14px; margin-bottom: 40px; }
  .sec-head h2 { font-size: 28px; }
  .p-row { grid-template-columns: 50px 1fr 26px; }
  .p-row .spec { display: none; }
  .news-row { grid-template-columns: 1fr 26px; }
  .news-row .date, .news-row .cat { display: none; }
  .hero .ghost { font-size: 110px; }
  .infobar .wrap span.hide-m { display: none; }
}

/* ============================================================
   内页组件（page-hero / 表格 / 正文 / 文章）
   ============================================================ */
.page-hero { background: var(--paper-2); border-bottom: 1px solid var(--line); padding: 74px 0 64px; position: relative; overflow: hidden; }
.page-hero .ghost2 {
  position: absolute; right: -20px; bottom: -30px; font-size: 140px; font-weight: 800; letter-spacing: 6px;
  color: transparent; -webkit-text-stroke: 1px var(--line); line-height: 1; user-select: none; pointer-events: none;
}
.page-hero .wrap { position: relative; z-index: 2; }
.crumb { font-size: 13px; color: var(--ink-3); margin-bottom: 18px; letter-spacing: 1px; }
.crumb a { color: var(--pine-2); }
.crumb a:hover { color: var(--gold); }
.page-hero h1 { font-size: 42px; font-weight: 800; color: var(--ink); letter-spacing: 2px; }
.page-hero p { color: var(--ink-2); margin-top: 14px; max-width: 720px; font-size: 16px; }

/* 参数表 */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--white); box-shadow: 0 10px 30px rgba(23,21,15,.05); }
table.spec { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
table.spec th { background: var(--pine); color: #EDEFE8; padding: 14px 18px; text-align: left; font-weight: 700; white-space: nowrap; letter-spacing: 1px; }
table.spec td { padding: 13px 18px; border-top: 1px solid var(--line); color: var(--ink-2); }
table.spec tr:nth-child(even) td { background: var(--paper); }
table.spec td:first-child { font-weight: 700; color: var(--pine); white-space: nowrap; }
.spec-note { font-size: 12.5px; color: var(--ink-3); margin-top: 12px; line-height: 1.8; }

/* 正文 */
.prose { max-width: 820px; margin: 0 auto; font-size: 15.5px; color: var(--ink-2); }
.prose h2 { font-size: 23px; color: var(--pine); margin: 40px 0 16px; padding-left: 16px; border-left: 4px solid var(--gold); font-family: "Noto Serif SC","Source Han Serif SC","STSong",Georgia,serif; letter-spacing: 1px; }
.prose h3 { font-size: 18px; color: var(--ink); margin: 26px 0 12px; font-weight: 800; }
.prose p { margin-bottom: 15px; }
.prose ul { margin: 0 0 16px 4px; }
.prose ul li { padding-left: 22px; position: relative; margin-bottom: 9px; }
.prose ul li::before { content: ""; position: absolute; left: 2px; top: 11px; width: 7px; height: 7px; background: var(--gold); }
.prose table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px; }
.prose table th { background: var(--pine); color: #fff; padding: 10px 14px; text-align: left; }
.prose table td { padding: 10px 14px; border: 1px solid var(--line); }
.prose .meta { display: flex; gap: 18px; align-items: center; margin-bottom: 34px; font-size: 13.5px; color: var(--ink-3); }
.prose .cat-chip { background: var(--pine); color: var(--gold-l); font-size: 12px; font-weight: 700; padding: 5px 14px; letter-spacing: 2px; }
.art-cta { margin-top: 52px; background: var(--white); border: 1px solid var(--line); border-left: 4px solid var(--gold); padding: 30px 34px; }
.art-cta h3 { font-size: 18px; color: var(--pine); font-weight: 800; margin-bottom: 8px; }
.art-cta p { font-size: 14px; color: var(--ink-2); margin-bottom: 18px; }
.art-nav { display: flex; justify-content: space-between; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 14px; }
.art-nav a { color: var(--pine-2); font-weight: 600; }
.art-nav a:hover { color: var(--gold); }

/* 分页/筛选 chips */
.chip-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.chip { font-size: 13.5px; font-weight: 600; padding: 8px 20px; border: 1px solid var(--line); color: var(--ink-2); background: var(--white); border-radius: 999px; cursor: pointer; transition: all .2s; }
.chip:hover { border-color: var(--pine-2); color: var(--pine-2); }
.chip.on { background: var(--pine); border-color: var(--pine); color: var(--gold-l); }