/* ==========================================================================
   东莞市良业包装制品有限公司 — 站点样式
   ========================================================================== */

:root {
  --ink: #17130E;
  --ink-soft: #3B342A;
  --muted: #7A7064;
  --kraft: #B4721F;
  --kraft-dark: #8A5312;
  --kraft-light: #E8A34A;
  --paper: #FBF8F3;
  --paper-2: #F4EDE2;
  --line: #E4DACA;
  --line-2: #D3C5AF;
  --white: #FFFFFF;

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC",
    Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --wrap: 1220px;
  --radius: 2px;
  --shadow-sm: 0 1px 2px rgba(23, 19, 14, .05);
  --shadow-md: 0 18px 40px -22px rgba(23, 19, 14, .35);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }

::selection { background: var(--kraft); color: #fff; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- 顶部信息条 ---------- */
.topbar {
  background: var(--ink);
  color: rgba(255, 255, 255, .72);
  font-size: 12.5px;
  letter-spacing: .02em;
}
.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 38px;
}
.topbar-left { display: flex; align-items: center; gap: 18px; }
.topbar-right { display: flex; align-items: center; gap: 16px; white-space: nowrap; }
.topbar .sep { width: 1px; height: 11px; background: rgba(255, 255, 255, .22); }
.topbar a:hover { color: #fff; }
.topbar strong { color: var(--kraft-light); font-weight: 500; }

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(251, 248, 243, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s var(--ease);
}
.site-header.is-stuck { box-shadow: 0 8px 30px -18px rgba(23, 19, 14, .4); }
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 34px;
  height: 78px;
  transition: height .3s var(--ease);
}
.site-header.is-stuck .wrap { height: 66px; }

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-mark {
  width: 40px;
  height: 40px;
  color: var(--kraft);
  flex-shrink: 0;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.22; }
.logo-cn {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink);
}
.logo-en {
  font-size: 9.5px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--muted);
  font-family: var(--font-mono);
}

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--ink-soft);
  transition: color .2s;
  white-space: nowrap;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--kraft);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .32s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }
.nav a.active { color: var(--ink); font-weight: 600; }

.nav-mobile-cta { display: none; }

.scroll-anchor, [id] { scroll-margin-top: 96px; }

.header-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.menu-toggle {
  display: none;
  position: relative;
  z-index: 100;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
}
.menu-toggle span::before, .menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform .3s var(--ease), top .3s var(--ease);
}
.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }
body.nav-open .menu-toggle span { background: transparent; }
body.nav-open .menu-toggle span::before { top: 0; transform: rotate(45deg); }
body.nav-open .menu-toggle span::after { top: 0; transform: rotate(-45deg); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .04em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background .25s var(--ease), color .25s var(--ease),
    border-color .25s var(--ease), transform .25s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 15px; height: 15px; transition: transform .3s var(--ease); }
.btn:hover svg.arrow { transform: translateX(4px); }
.btn-primary { background: var(--kraft); color: #fff; }
.btn-primary:hover { background: var(--kraft-dark); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #2E2820; }
.btn-ghost {
  border-color: var(--line-2);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--ink); background: rgba(23, 19, 14, .03); }
.btn-light {
  background: rgba(255, 255, 255, .1);
  border-color: rgba(255, 255, 255, .34);
  color: #fff;
}
.btn-light:hover { background: #fff; color: var(--ink); border-color: #fff; }
.btn-sm { padding: 9px 18px; font-size: 13.5px; }
.btn-lg { padding: 16px 34px; font-size: 15.5px; }

.btn-phone {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--ink);
  font-size: 16px;
  letter-spacing: .02em;
}
.btn-phone svg { width: 17px; height: 17px; color: var(--kraft); }
.btn-phone small {
  display: block;
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--muted);
  font-weight: 400;
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  min-height: min(88vh, 760px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--ink);
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 45%;
  transform: scale(1.02);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(100deg, rgba(15, 12, 8, .93) 0%, rgba(15, 12, 8, .78) 38%, rgba(15, 12, 8, .38) 68%, rgba(15, 12, 8, .22) 100%),
    radial-gradient(120% 80% at 0% 100%, rgba(180, 114, 31, .22), transparent 60%);
}
.hero-inner {
  padding-top: 64px;
  padding-bottom: 64px;
  max-width: 760px;
  margin-right: auto;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--kraft-light);
  margin: 0 0 22px;
}
.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: currentColor;
  opacity: .7;
}
.hero h1 {
  font-size: clamp(26px, 6.8vw, 56px);
  line-height: 1.24;
  letter-spacing: .01em;
  font-weight: 700;
  color: #fff;
  margin: 0 0 22px;
}
.hero h1 em {
  font-style: normal;
  color: var(--kraft-light);
}
.hero .lede {
  font-size: 16.5px;
  line-height: 1.95;
  color: rgba(255, 255, 255, .78);
  max-width: 33em;
  margin: 0 0 34px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 40px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid rgba(255, 255, 255, .16);
  list-style: none;
}
.hero-facts li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, .74);
  letter-spacing: .02em;
}
.hero-facts li svg { width: 14px; height: 14px; color: var(--kraft-light); flex-shrink: 0; }

/* 首屏右下角浮动卡片 */
.hero-card {
  position: absolute;
  right: max(28px, calc((100vw - var(--wrap)) / 2 + 28px));
  bottom: 56px;
  width: 268px;
  padding: 22px 24px;
  background: rgba(255, 255, 255, .96);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px -30px rgba(0, 0, 0, .6);
  display: none;
}
.hero-card .hc-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--muted);
  text-transform: uppercase;
}
.hero-card .hc-phone {
  display: block;
  font-size: 23px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .02em;
  margin: 4px 0 2px;
}
.hero-card .hc-sub { font-size: 12.5px; color: var(--muted); line-height: 1.6; }
.hero-card hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0 14px; }
.hero-card .hc-row { display: flex; gap: 8px; }

/* ---------- 数据条 ---------- */
.stats {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.stats .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 34px 26px 32px;
  border-left: 1px solid var(--line);
}
.stat:first-child { border-left: 0; padding-left: 0; }
.stat-num {
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -.01em;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.stat-num span { font-size: 15px; font-weight: 500; color: var(--kraft); letter-spacing: .02em; }
.stat-label {
  font-size: 13px;
  color: var(--muted);
  margin-top: 10px;
  letter-spacing: .02em;
}

/* ---------- 通用板块 ---------- */
.section { padding: 104px 0; }
.section.tight { padding: 78px 0; }
.section.paper2 { background: var(--paper-2); }
.section.white { background: var(--white); }
.section.dark { background: var(--ink); color: rgba(255, 255, 255, .76); }

.section-head { max-width: 720px; margin-bottom: 54px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .eyebrow::after {
  content: "";
  width: 34px;
  height: 1px;
  background: currentColor;
  opacity: .7;
  order: 2;
}
.section-head .eyebrow { color: var(--kraft); margin-bottom: 18px; }
.section h2 {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.34;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .01em;
  margin: 0 0 18px;
}
.section h2 em { font-style: normal; color: var(--kraft); }
.section-head p {
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--muted);
  margin: 0;
}
.section.dark h2 { color: #fff; }
.section.dark .section-head p { color: rgba(255, 255, 255, .62); }
.section.dark .section-head .eyebrow { color: var(--kraft-light); }

.section-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 46px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
}
.section.dark .section-foot { border-color: rgba(255, 255, 255, .14); }

/* ---------- 产品卡 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.p-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .35s var(--ease), transform .35s var(--ease),
    box-shadow .35s var(--ease);
}
.p-card:hover {
  border-color: var(--line-2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.p-thumb {
  position: relative;
  aspect-ratio: 10 / 9;
  overflow: hidden;
  background: var(--paper-2);
}
.p-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s var(--ease);
}
.p-card:hover .p-thumb img { transform: scale(1.045); }
.p-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  background: rgba(251, 248, 243, .94);
  color: var(--kraft-dark);
  border-radius: 1px;
}
.p-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.p-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 8px;
  letter-spacing: .01em;
}
.p-body p {
  font-size: 13.8px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 16px;
  flex: 1;
}
.p-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}
.p-meta span {
  font-size: 11.5px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 1px;
  color: var(--ink-soft);
  background: var(--paper);
}
.p-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--kraft-dark);
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.p-link svg { width: 14px; height: 14px; transition: transform .3s var(--ease); }
.p-card:hover .p-link svg { transform: translateX(4px); }

/* 询价引导卡 */
.p-card.is-cta {
  background: var(--ink);
  border-color: var(--ink);
  padding: 40px 34px 32px;
  justify-content: space-between;
  min-height: 340px;
}
.p-card.is-cta:hover { background: #221C15; border-color: #221C15; }
.p-card.is-cta .cta-eyebrow {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--kraft-light);
  text-transform: uppercase;
}
.p-card.is-cta h3 {
  color: #fff;
  font-size: 23px;
  line-height: 1.5;
  margin: 16px 0 12px;
}
.p-card.is-cta p { color: rgba(255, 255, 255, .6); font-size: 14px; }
.p-card.is-cta .p-link {
  color: var(--kraft-light);
  border-color: rgba(255, 255, 255, .16);
  margin-top: 22px;
}

/* ---------- 图文分栏 ---------- */
.split {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 64px;
  align-items: center;
}
.split.reverse > .split-media { order: 2; }
.split-media { position: relative; }
.split-media img {
  width: 100%;
  aspect-ratio: 4 / 3.1;
  object-fit: cover;
  border-radius: var(--radius);
}
.split-media .badge-stamp {
  position: absolute;
  left: -22px;
  bottom: -22px;
  background: var(--kraft);
  color: #fff;
  padding: 18px 22px;
  border-radius: var(--radius);
  box-shadow: 0 18px 40px -20px rgba(138, 83, 18, .8);
}
.badge-stamp strong {
  display: block;
  font-size: 26px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -.01em;
}
.badge-stamp span {
  font-size: 11.5px;
  letter-spacing: .1em;
  opacity: .86;
}
.split-copy h2 { margin-bottom: 20px; }
.split-copy > p { font-size: 15.5px; line-height: 1.95; color: var(--muted); margin: 0 0 28px; }

.dot-list { list-style: none; padding: 0; margin: 0 0 30px; display: grid; gap: 18px; }
.dot-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  font-size: 14.5px;
  line-height: 1.8;
}
.dot-list .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--kraft);
  padding-top: 5px;
  letter-spacing: .06em;
}
.dot-list strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 2px;
}
.dot-list span.desc { color: var(--muted); }

/* ---------- 行业应用 ---------- */
.industry {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}
.industry span {
  padding: 9px 20px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 1px;
  font-size: 14px;
  color: rgba(255, 255, 255, .82);
  letter-spacing: .04em;
  transition: background .3s, border-color .3s, color .3s;
}
.industry span:hover {
  background: var(--kraft);
  border-color: var(--kraft);
  color: #fff;
}

/* ---------- 定制流程 ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.step {
  position: relative;
  background: var(--white);
  padding: 36px 30px 34px;
  transition: background .35s var(--ease);
}
.step:hover { background: var(--paper); }
.step-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--kraft);
  letter-spacing: .14em;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.step-no::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line);
}
.step h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
}
.step p { font-size: 13.8px; line-height: 1.85; color: var(--muted); margin: 0; }

/* ---------- 承诺卡 ---------- */
.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.promise {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--kraft);
  padding: 34px 30px 32px;
  border-radius: var(--radius);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.promise:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.promise .ico {
  width: 42px;
  height: 42px;
  color: var(--kraft);
  margin-bottom: 20px;
}
.promise h3 { font-size: 17.5px; font-weight: 700; color: var(--ink); margin: 0 0 10px; }
.promise p { font-size: 14px; line-height: 1.85; color: var(--muted); margin: 0; }
.promise .kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--kraft);
  margin-bottom: 8px;
}

/* ---------- 新闻卡 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.n-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 28px 28px 26px;
  border-radius: var(--radius);
  transition: border-color .3s, transform .3s var(--ease), box-shadow .3s var(--ease);
}
.n-card:hover {
  border-color: var(--line-2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.n-date {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--kraft);
  margin-bottom: 14px;
}
.n-card h3 {
  font-size: 17px;
  line-height: 1.6;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
}
.n-card p {
  font-size: 13.8px;
  line-height: 1.85;
  color: var(--muted);
  margin: 0 0 20px;
  flex: 1;
}
.n-more {
  font-size: 13px;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
  letter-spacing: .02em;
}
.n-more svg { width: 13px; height: 13px; transition: transform .3s var(--ease); }
.n-card:hover .n-more svg { transform: translateX(4px); }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  position: relative;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(180, 114, 31, .38), transparent 62%),
    linear-gradient(90deg, rgba(23, 19, 14, 1) 30%, rgba(23, 19, 14, .86) 100%);
}
.cta-band .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding-top: 66px;
  padding-bottom: 66px;
}
.cta-band h2 {
  font-size: clamp(24px, 2.7vw, 34px);
  line-height: 1.4;
  margin: 0 0 12px;
  color: #fff;
  font-weight: 700;
}
.cta-band p { margin: 0; color: rgba(255, 255, 255, .64); font-size: 14.5px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; flex-shrink: 0; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: #12100C;
  color: rgba(255, 255, 255, .56);
  font-size: 13.5px;
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}
.site-footer .logo-cn { color: #fff; }
.site-footer .logo-en { color: rgba(255, 255, 255, .42); }
.footer-about p { margin: 20px 0 0; line-height: 1.95; max-width: 32em; }
.footer-col h4 {
  color: #fff;
  font-size: 13px;
  letter-spacing: .16em;
  font-weight: 600;
  margin: 0 0 20px;
  text-transform: uppercase;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.footer-col a:hover { color: var(--kraft-light); }
.footer-contact li { display: flex; gap: 10px; line-height: 1.75; }
.footer-contact svg { width: 15px; height: 15px; color: var(--kraft); flex-shrink: 0; margin-top: 4px; }
.footer-contact strong { color: #fff; font-weight: 600; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 22px 0 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, .38);
  flex-wrap: wrap;
}
.footer-bottom a:hover { color: rgba(255, 255, 255, .7); }

/* ---------- 内页页头 ---------- */
.page-hero {
  position: relative;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: .42;
}
.page-hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(100deg, rgba(15, 12, 8, .96) 0%, rgba(15, 12, 8, .84) 55%, rgba(15, 12, 8, .62) 100%);
}
.page-hero .wrap { padding: 78px 28px 74px; }
.page-hero h1 {
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.3;
  margin: 0 0 18px;
  font-weight: 700;
  letter-spacing: .01em;
}
.page-hero p {
  max-width: 46em;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .7);
  margin: 0;
}
.crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, .48);
  margin-bottom: 26px;
  font-family: var(--font-mono);
  letter-spacing: .06em;
}
.crumb a:hover { color: #fff; }
.crumb span.sep { opacity: .5; }
.crumb .now { color: var(--kraft-light); }

/* ---------- 规格表 ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}
table.spec {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 760px;
}
table.spec th {
  background: var(--paper-2);
  color: var(--ink);
  font-weight: 600;
  text-align: left;
  padding: 15px 20px;
  font-size: 13px;
  letter-spacing: .04em;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
table.spec td {
  padding: 15px 20px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  vertical-align: top;
}
table.spec tr:last-child td { border-bottom: 0; }
table.spec tbody tr:hover td { background: var(--paper); }
table.spec td:first-child { color: var(--ink); font-weight: 600; white-space: nowrap; }
table.spec .flute {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--kraft-dark);
}

.note {
  margin-top: 18px;
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.8;
}

/* ---------- 筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.filter-bar button {
  padding: 9px 20px;
  border: 1px solid var(--line-2);
  background: transparent;
  border-radius: 1px;
  font-size: 13.5px;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .25s var(--ease);
  letter-spacing: .02em;
}
.filter-bar button:hover { border-color: var(--ink); }
.filter-bar button.on { background: var(--ink); border-color: var(--ink); color: #fff; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line-2);
}
.tl-item { position: relative; padding-bottom: 38px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--kraft);
}
.tl-year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--kraft);
  margin-bottom: 4px;
}
.tl-item h3 { font-size: 17px; margin: 0 0 6px; color: var(--ink); font-weight: 700; }
.tl-item p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.85; }

/* ---------- 证书卡 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.cert {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.cert .seal {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  color: var(--kraft);
}
.cert h3 { font-size: 16px; margin: 0 0 6px; color: var(--ink); font-weight: 700; }
.cert p { margin: 0; font-size: 13.5px; line-height: 1.8; color: var(--muted); }
.cert .no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--kraft-dark);
  margin-top: 6px;
  letter-spacing: .02em;
}

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}
.faq summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  transition: color .2s;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--kraft-dark); }
.faq summary .q {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--kraft);
  padding-top: 4px;
  flex-shrink: 0;
}
.faq summary .plus {
  margin-left: auto;
  width: 14px;
  height: 14px;
  position: relative;
  flex-shrink: 0;
  margin-top: 7px;
}
.faq summary .plus::before, .faq summary .plus::after {
  content: "";
  position: absolute;
  background: var(--kraft);
  transition: transform .3s var(--ease);
}
.faq summary .plus::before { left: 0; top: 6px; width: 14px; height: 1.5px; }
.faq summary .plus::after { left: 6px; top: 0; width: 1.5px; height: 14px; }
.faq details[open] summary .plus::after { transform: rotate(90deg); opacity: 0; }
.faq .a {
  padding: 0 26px 26px 42px;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--muted);
  max-width: 62em;
}
.faq .a p { margin: 0 0 10px; }
.faq .a p:last-child { margin: 0; }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 56px;
  align-items: start;
}
.info-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.info-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.info-list li:first-child { padding-top: 0; }
.info-list .ico {
  width: 38px;
  height: 38px;
  background: var(--paper-2);
  color: var(--kraft-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.info-list .ico svg { width: 17px; height: 17px; }
.info-list .k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.info-list .v { font-size: 15.5px; color: var(--ink); line-height: 1.7; font-weight: 500; }
.info-list .v.big { font-size: 22px; font-weight: 700; letter-spacing: .02em; }
.info-list .sub { font-size: 12.5px; color: var(--muted); font-weight: 400; margin-top: 2px; }

.form-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 38px 40px 40px;
  box-shadow: var(--shadow-sm);
}
.form-card h3 { font-size: 21px; margin: 0 0 8px; color: var(--ink); font-weight: 700; }
.form-card .hint { font-size: 13.5px; color: var(--muted); margin: 0 0 28px; line-height: 1.8; }
.field { display: grid; gap: 7px; margin-bottom: 18px; }
.field label { font-size: 13px; color: var(--ink-soft); font-weight: 500; letter-spacing: .02em; }
.field label .req { color: var(--kraft); }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line-2);
  border-radius: 1px;
  background: var(--paper);
  font-family: inherit;
  font-size: 14.5px;
  color: var(--ink);
  transition: border-color .2s, background .2s;
  outline: none;
}
.field textarea { resize: vertical; min-height: 92px; line-height: 1.75; }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--kraft);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(180, 114, 31, .1);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-actions { display: flex; align-items: center; gap: 16px; margin-top: 8px; flex-wrap: wrap; }
.form-actions .tip { font-size: 12.5px; color: var(--muted); }

.quote-out {
  margin-top: 22px;
  border: 1px dashed var(--line-2);
  background: var(--paper);
  padding: 20px 22px;
  border-radius: var(--radius);
  display: none;
}
.quote-out.show { display: block; }
.quote-out h4 {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--kraft-dark);
  font-family: var(--font-mono);
  font-weight: 500;
}
.quote-out pre {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  white-space: pre-wrap;
  word-break: break-word;
}
.quote-out .row { display: flex; gap: 10px; flex-wrap: wrap; }

.map-box {
  border: 1px solid var(--line);
  background: var(--paper-2);
  padding: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  flex-wrap: wrap;
  border-radius: var(--radius);
}

/* ---------- 文章 ---------- */
.article {
  max-width: 780px;
}
.article h2 {
  font-size: 26px;
  margin: 0 0 10px;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.45;
}
.article .meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--kraft);
  letter-spacing: .08em;
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.article h3 { font-size: 18px; margin: 34px 0 12px; color: var(--ink); font-weight: 700; }
.article p { font-size: 15.5px; line-height: 2; color: var(--ink-soft); margin: 0 0 16px; }
.article ul { padding-left: 20px; margin: 0 0 16px; }
.article li { font-size: 15.5px; line-height: 1.95; color: var(--ink-soft); margin-bottom: 8px; }
.article .callout {
  border-left: 3px solid var(--kraft);
  background: var(--paper-2);
  padding: 18px 22px;
  margin: 26px 0;
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.9;
}
.article-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.article-item {
  display: grid;
  grid-template-columns: 118px 1fr auto;
  gap: 26px;
  align-items: center;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  transition: padding .3s var(--ease);
}
.article-item:hover { padding-left: 8px; }
.article-item .d {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .06em;
}
.article-item h3 { font-size: 17px; margin: 0 0 4px; color: var(--ink); font-weight: 600; }
.article-item p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.7; }
.article-item .go { color: var(--kraft); }
.article-item .go svg { width: 18px; height: 18px; }

/* ---------- 移动端悬浮条 ---------- */
.mobile-bar {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 95;
  background: rgba(255, 255, 255, .97);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.mobile-bar a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  border-radius: 2px;
  font-size: 14.5px;
  font-weight: 600;
}
.mobile-bar a svg { width: 16px; height: 16px; }
.mobile-bar .call { background: var(--kraft); color: #fff; }
.mobile-bar .ask { background: var(--ink); color: #fff; }

/* ---------- 动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .hero-bg img { transform: none; }
}

/* ---------- 响应式 ---------- */
@media (min-width: 1080px) {
  .hero-card { display: block; }
}

@media (max-width: 1080px) {
  .product-grid, .news-grid, .promise-grid { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split.reverse > .split-media { order: 0; }
  .split-media .badge-stamp { left: auto; right: 20px; bottom: -20px; }
  .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .stats .wrap { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; padding-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .cta-band .wrap { flex-direction: column; align-items: flex-start; gap: 28px; }
}

@media (max-width: 900px) {
  .topbar-right { display: none; }
  /* backdrop-filter 会让页头成为 fixed 子元素的包含块，移动端改为纯色背景 */
  .site-header {
    background: var(--paper);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  .site-header { z-index: 100; }
  .site-header .wrap { height: 66px; gap: 16px; }
  .menu-toggle { display: flex; margin-left: auto; }
  .header-cta { display: none; }
  .nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(78vw, 320px);
    background: var(--paper);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 92px 24px 40px;
    margin: 0;
    border-left: 1px solid var(--line);
    clip-path: inset(0 0 0 100%);
    visibility: hidden;
    transition: clip-path .42s var(--ease), visibility .42s var(--ease);
    box-shadow: -20px 0 60px -30px rgba(0, 0, 0, .5);
    overflow-y: auto;
    z-index: 99;
  }
  body.nav-open .nav {
    clip-path: inset(0 0 0 0);
    visibility: visible;
  }
  .nav a {
    padding: 15px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }
  .nav a::after { display: none; }
  .nav a.active { color: var(--kraft-dark); }
  .nav .nav-mobile-cta {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  body.nav-open { overflow: hidden; }
  .nav-scrim {
    position: fixed;
    inset: 0;
    background: rgba(18, 16, 12, .45);
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s;
    z-index: 98;
  }
  body.nav-open .nav-scrim { opacity: 1; pointer-events: auto; }
  .section { padding: 68px 0; }
  .section.tight { padding: 56px 0; }
  .hero { min-height: 0; }
  .hero-inner { padding-top: 72px; padding-bottom: 64px; }
  .hero-facts { margin-top: 30px; }
  .mobile-bar { display: grid; }
  body { padding-bottom: 66px; }
  .article-item { grid-template-columns: 1fr; gap: 8px; }
  .article-item .d { font-size: 11.5px; }
  .article-item .go { display: none; }
  .cert-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .page-hero .wrap { padding: 56px 20px 54px; }
  .product-grid, .news-grid, .promise-grid, .process { grid-template-columns: 1fr; }
  .stats .wrap { grid-template-columns: 1fr 1fr; }
  .stat { padding: 24px 18px; }
  .stat-num { font-size: 30px; }
  .stat-label { font-size: 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .form-card { padding: 26px 22px 28px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .section-foot { flex-direction: column; align-items: flex-start; gap: 14px; }
  .hero-actions .btn { flex: 1; }
  .topbar-left { gap: 12px; font-size: 11.5px; }
  .topbar-left .hide-sm { display: none; }
  .map-box { padding: 24px; }
  .logo-cn { font-size: 17px; }
  .logo-en { font-size: 8.5px; }
}