/* ==========================================================================
   COOKITOP × COTHERM — China partner one-pager
   Palette and type scale are taken from cotherm.com's own theme:
   navy #002060, signal green #04DF00, Ubuntu / Ubuntu Mono.
   ========================================================================== */

:root {
  --navy: #002060;
  --navy-900: #001440;
  --navy-700: #0a2f7a;
  --navy-100: #e8eefa;
  --green: #04df00;
  --green-600: #03bd00;
  --green-050: #e9ffe8;
  --ink: #212529;
  --ink-soft: #4a5266;
  --gray-600: #6c757d;
  --gray-500: #8c97ae;
  --gray-300: #b7becb;
  --line: #e3e6ef;
  --mist: #f5f5fa;
  --white: #fff;

  --font-sans: "Ubuntu", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    sans-serif;
  --font-mono: "Ubuntu Mono", ui-monospace, SFMono-Regular, Menlo, Consolas,
    monospace;

  --radius: 18px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(0, 32, 96, .06);
  --shadow: 0 18px 46px rgba(0, 32, 96, .12);
  --shell: 1200px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-decoration: none; }
button { font: inherit; cursor: pointer; }

h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.22; letter-spacing: -.01em; }
p { margin: 0; }
ul, ol, dl, dd, figure, figcaption { margin: 0; padding: 0; }
li { list-style: none; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--navy); color: #fff; padding: 12px 20px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.container { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 24px; }

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 15px 28px; border: 1px solid var(--green); border-radius: 999px;
  background: var(--green); color: var(--navy);
  font-family: var(--font-mono); font-size: 15px; font-weight: 400;
  letter-spacing: .06em; text-transform: uppercase; line-height: 1;
  transition: background .28s var(--ease), color .28s var(--ease),
              border-color .28s var(--ease), transform .28s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: transform .28s var(--ease); }
.btn:hover { background: var(--navy); border-color: var(--navy); color: #fff; transform: translateY(-2px); }
.btn:hover svg { transform: translateX(4px); }
.btn-sm { padding: 11px 20px; font-size: 13px; }

.btn-ghost { background: transparent; border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn-ghost:hover { background: #fff; border-color: #fff; color: var(--navy); }

/* ---------------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 80;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s var(--ease);
}
.site-header.is-stuck { box-shadow: 0 10px 30px rgba(0, 32, 96, .08); }
.header-inner { display: flex; align-items: center; gap: 26px; min-height: 76px; }

.brand { display: inline-flex; align-items: center; gap: 14px; flex: 0 0 auto; }
.brand-cookitop {
  font-family: var(--font-sans); font-weight: 500; font-size: 21px;
  letter-spacing: .22em; color: var(--navy); line-height: 1;
}
.brand-cookitop span { color: var(--green-600); }
.brand-divider { width: 1px; height: 30px; background: var(--line); }
.brand-cotherm { height: 26px; width: auto; }

.nav { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.nav-link {
  position: relative; padding: 6px 0; font-size: 15px; font-weight: 500;
  color: var(--navy); white-space: nowrap;
}
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--green); transition: width .3s var(--ease);
}
.nav-link:hover::after, .nav-link.is-active::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 18px; }
.lang-switch {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 14px; letter-spacing: .04em;
}
.lang-btn {
  border: 0; background: none; padding: 4px 2px; color: var(--gray-500);
  font-family: inherit; font-size: inherit; letter-spacing: inherit;
  transition: color .2s linear;
}
.lang-btn.is-active { color: var(--navy); font-weight: 700; }
.lang-btn:hover { color: var(--green-600); }
.lang-sep { color: var(--gray-300); }

.menu-toggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--line);
  border-radius: 12px; background: #fff; padding: 11px 10px;
  flex-direction: column; justify-content: space-between;
}
.menu-toggle span { display: block; height: 2px; background: var(--navy); border-radius: 2px; transition: transform .25s var(--ease), opacity .2s linear; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ---------------------------------------------------------------- hero */
.hero { position: relative; background: var(--navy); color: #fff; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background:
    linear-gradient(115deg, rgba(0, 20, 64, .96) 6%, rgba(0, 32, 96, .92) 44%, rgba(0, 32, 96, .55) 100%),
    url("../img/bg-hero.jpg") center / cover no-repeat;
}
.hero-bg::after {
  content: ""; position: absolute; inset: auto -10% -30% auto;
  width: 620px; height: 620px; border-radius: 50%;
  background: radial-gradient(circle, rgba(4, 223, 0, .22), transparent 62%);
}

.hero-inner {
  position: relative; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: 56px; align-items: center; padding-top: 84px; padding-bottom: 96px;
}
.hero-copy { max-width: 660px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .1em;
  text-transform: uppercase; color: rgba(255, 255, 255, .82);
  margin-bottom: 26px; line-height: 1.5;
}
.eyebrow .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px rgba(4, 223, 0, .18); flex: 0 0 auto; }

.hero h1 {
  font-size: clamp(34px, 4.1vw, 60px); line-height: 1.14; letter-spacing: -.02em;
  margin-bottom: 26px;
}
.hero-h1-sub { display: block; color: var(--green); }

.hero-lead { font-size: 17px; line-height: 1.85; color: rgba(255, 255, 255, .84); max-width: 620px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 36px 0 34px; }

.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags li {
  padding: 8px 16px; border-radius: 999px; font-size: 13.5px;
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .18);
  color: rgba(255, 255, 255, .9);
}

.hero-visual { position: relative; justify-self: end; width: 100%; max-width: 430px; }
.hero-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 30px 70px rgba(0, 12, 40, .45);
}
.hero-card img { aspect-ratio: 1 / 1; object-fit: cover; width: 100%; }
.hero-card-body { padding: 22px 24px 26px; border-top: 3px solid var(--green); }
.hero-card-en { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--gray-500); }
.hero-card-zh { font-size: 21px; font-weight: 700; color: var(--navy); margin-top: 4px; }
.hero-card-note { font-size: 14px; color: var(--ink-soft); margin-top: 8px; line-height: 1.65; }

.hero-badge {
  position: absolute; right: -18px; bottom: -26px;
  display: flex; flex-direction: column; gap: 2px;
  padding: 18px 24px; border-radius: 16px; background: var(--green); color: var(--navy);
  box-shadow: 0 18px 40px rgba(4, 223, 0, .32);
}
.hero-badge-num { font-size: 34px; font-weight: 700; line-height: 1; }
.hero-badge-num span { font-size: 20px; }
.hero-badge-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }

.hero-stats { position: relative; border-top: 1px solid rgba(255, 255, 255, .16); background: rgba(0, 12, 40, .42); }
.hero-stats-inner { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); }
.stat { padding: 26px 22px; border-left: 1px solid rgba(255, 255, 255, .12); }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat-num { display: block; font-size: 30px; font-weight: 700; line-height: 1.1; color: #fff; }
.stat-num span { color: var(--green); }
.stat-label { display: block; margin-top: 6px; font-size: 13.5px; line-height: 1.5; color: rgba(255, 255, 255, .72); }

/* ---------------------------------------------------------------- band */
.band { background: var(--navy-900); color: #fff; }
.band--photo {
  position: relative; overflow: hidden;
  background: linear-gradient(90deg, rgba(0, 20, 64, .96), rgba(0, 32, 96, .9)),
              url("../img/bg-band.jpg") center / cover no-repeat;
}
.band--photo .band-inner { position: relative; z-index: 1; }
.band-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 20px 40px; padding: 20px 24px; }
.band-title {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--green); flex: 0 0 auto;
}
.band-list { display: flex; flex-wrap: wrap; gap: 12px 28px; margin-left: auto; }
.band-list li {
  position: relative; padding-left: 20px; font-size: 13.5px;
  color: rgba(255, 255, 255, .78);
}
.band-list li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 8px; height: 8px; border-radius: 50%; background: var(--green);
}

/* ---------------------------------------------------------------- sections */
.section { padding: 96px 0; }
.section--mist { background: var(--mist); }
.section--navy { background: var(--navy); color: #fff; }

.section-head { max-width: 900px; margin-bottom: 56px; }
.section-label {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--green-600); margin-bottom: 16px;
  display: inline-flex; align-items: center; gap: 10px;
}
.section-label::before { content: ""; width: 26px; height: 2px; background: var(--green); }
.section-title { font-size: clamp(27px, 3.1vw, 44px); color: var(--navy); }
.section-desc { margin-top: 22px; font-size: 16.5px; line-height: 1.85; color: var(--ink-soft); max-width: 800px; }

.section-head--light .section-label { color: var(--green); }
.section-head--light .section-title { color: #fff; }
.section-head--light .section-desc { color: rgba(255, 255, 255, .78); }

.section--photo {
  position: relative; overflow: hidden;
  background: var(--navy);
}
.section--photo::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0, 20, 64, .93), rgba(0, 32, 96, .9)),
              url("../img/bg-support.jpg") center / cover no-repeat;
}
.section--photo > .container { position: relative; z-index: 1; }

.section-cta {
  margin-top: 52px; padding: 30px 34px; border-radius: var(--radius);
  background: var(--mist); border: 1px solid var(--line);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px;
}
.section-cta p { font-size: 17px; font-weight: 500; color: var(--navy); }

/* ---------------------------------------------------------------- grids */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

/* ---------------------------------------------------------------- product cards */
.product-card {
  display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.product-media { position: relative; background: var(--mist); overflow: hidden; }
.product-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .6s var(--ease); }
.product-card:hover .product-media > img:not(.product-inset) { transform: scale(1.05); }
.product-inset {
  position: absolute; right: 16px; bottom: 16px; width: 78px; height: 78px;
  object-fit: cover; border-radius: 14px; border: 3px solid #fff;
  background: #fff; box-shadow: 0 10px 26px rgba(0, 32, 96, .22);
}
.product-index {
  position: absolute; left: 18px; top: 18px;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .08em;
  background: rgba(255, 255, 255, .92); color: var(--navy);
  padding: 6px 12px; border-radius: 999px;
}
.product-body { padding: 26px 26px 28px; display: flex; flex-direction: column; flex: 1; }
.product-en {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--green-600); margin-bottom: 8px;
}
.product-title { font-size: 22px; color: var(--navy); }
.product-tagline { margin-top: 12px; font-size: 15px; color: var(--ink-soft); line-height: 1.7; }
.product-points { margin: 20px 0 0; display: grid; gap: 12px; }
.product-points li {
  position: relative; padding-left: 26px; font-size: 14.5px; line-height: 1.65; color: var(--ink);
}
.product-points li::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 9px;
  border-left: 2px solid var(--green-600); border-bottom: 2px solid var(--green-600);
  transform: rotate(-45deg); border-radius: 1px;
}
.product-for {
  margin-top: auto; padding-top: 20px; font-size: 13.5px; line-height: 1.65; color: var(--gray-500);
}
.product-for span:first-child { color: var(--navy); font-weight: 700; }
.product-models {
  margin-top: 20px; padding: 10px 14px; border-radius: var(--radius-sm);
  background: var(--mist); border-left: 3px solid var(--green);
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.6; color: var(--ink-soft);
}
.product-models span { color: var(--gray-500); }
.product-models b { color: var(--navy); font-weight: 700; margin-left: 6px; }

/* ---------------------------------------------------------------- market cards */
.market-card {
  display: flex; flex-direction: column; background: #fff; border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--line);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.market-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.market-card--wide { grid-column: span 2; flex-direction: row; }
.market-card--wide .market-media { flex: 0 0 40%; }
.market-card--wide .market-media img { height: 100%; aspect-ratio: auto; }

.market-media { position: relative; overflow: hidden; }
.market-media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .6s var(--ease); }
.market-card:hover .market-media img { transform: scale(1.04); }
.market-index {
  position: absolute; left: 20px; top: 20px; padding: 6px 13px; border-radius: 999px;
  background: var(--navy); color: #fff; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .1em;
}
.market-body { padding: 30px 30px 32px; flex: 1; }
.market-en {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--green-600);
}
.market-body h3 { font-size: 24px; color: var(--navy); margin-top: 6px; }
.market-tagline { margin-top: 12px; color: var(--ink-soft); font-size: 15px; line-height: 1.75; }
.app-list { margin-top: 22px; display: grid; gap: 16px; }
.app-list li {
  display: grid; grid-template-columns: 64px minmax(0, 1fr);
  gap: 4px 14px; align-items: start;
}
.app-thumb {
  grid-row: span 2; width: 64px; height: 64px; object-fit: cover;
  border-radius: 12px; border-left: 3px solid var(--green);
}
.app-list strong { display: block; font-size: 15px; color: var(--navy); }
.app-list span { display: block; font-size: 14px; line-height: 1.7; color: var(--ink-soft); }
.app-list--chips { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.market-note {
  margin-top: 24px; padding: 16px 18px; border-radius: var(--radius-sm);
  background: var(--green-050); border: 1px solid #c8f5c6;
  font-size: 13.5px; line-height: 1.7; color: #0a3d09;
}

/* ---------------------------------------------------------------- steps */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; counter-reset: step; }
.step-card {
  position: relative; padding: 34px 28px 30px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .3s var(--ease);
}
.step-card::before {
  content: ""; position: absolute; left: 0; top: 0; width: 3px; height: 0;
  background: var(--green); transition: height .4s var(--ease);
}
.step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.step-card:hover::before { height: 100%; }
.step-num {
  font-family: var(--font-mono); font-size: 34px; font-weight: 700; color: var(--navy-100);
  display: block; line-height: 1;
}
.step-en {
  margin-top: 18px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--green-600);
}
.step-card h3 { font-size: 22px; color: var(--navy); margin-top: 4px; }
.step-desc { margin-top: 12px; font-size: 14.5px; color: var(--ink-soft); line-height: 1.7; }
.step-card ul { margin-top: 18px; display: grid; gap: 9px; }
.step-card ul li { position: relative; padding-left: 22px; font-size: 14px; color: var(--ink); }
.step-card ul li::before {
  content: ""; position: absolute; left: 0; top: 8px; width: 7px; height: 7px;
  background: var(--green); border-radius: 2px; transform: rotate(45deg);
}

/* ---------------------------------------------------------------- lab band */
.lab-band {
  margin-top: 72px; display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: 0; background: var(--navy); border-radius: var(--radius); overflow: hidden; color: #fff;
}
.lab-media img { width: 100%; height: 100%; object-fit: cover; min-height: 340px; }
.lab-copy { padding: 44px 48px; }
.lab-copy { position: relative; }
.lab-seal {
  position: absolute; right: 30px; top: 30px; height: 88px; width: auto;
  border-radius: 6px; box-shadow: 0 10px 24px rgba(0, 0, 0, .3);
}
.lab-copy .section-label { color: var(--green); margin-bottom: 14px; }
.lab-copy h3 { font-size: clamp(22px, 2.2vw, 30px); color: #fff; }
.lab-copy > p { margin-top: 18px; font-size: 15px; line-height: 1.85; color: rgba(255, 255, 255, .8); }
.fact-list { margin-top: 26px; display: grid; gap: 14px; }
.fact-list li { display: flex; gap: 16px; align-items: baseline; border-top: 1px solid rgba(255, 255, 255, .14); padding-top: 14px; }
.fact-list strong { font-family: var(--font-mono); font-size: 20px; color: var(--green); min-width: 74px; }
.fact-list span { font-size: 14.5px; color: rgba(255, 255, 255, .82); }
.lab-note {
  margin-top: 26px; padding-left: 16px; border-left: 2px solid var(--green);
  font-size: 14.5px; line-height: 1.8; color: rgba(255, 255, 255, .86) !important;
}

/* ---------------------------------------------------------------- service cards */
.service-grid { gap: 24px; }
.service-card {
  padding: 34px 30px; border-radius: var(--radius);
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .14);
  transition: transform .35s var(--ease), background .35s var(--ease), border-color .35s var(--ease);
}
.service-card:hover { transform: translateY(-6px); background: rgba(255, 255, 255, .1); border-color: rgba(4, 223, 0, .5); }
.service-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; border-radius: 14px; background: var(--green);
}
.service-icon svg { width: 26px; height: 26px; fill: none; stroke: var(--navy); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.service-card h3 { margin-top: 20px; font-size: 19px; color: #fff; }
.service-card p { margin-top: 12px; font-size: 14.5px; line-height: 1.8; color: rgba(255, 255, 255, .76); }

/* ---------------------------------------------------------------- about */
.timeline {
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 0;
  border-top: 1px solid var(--line); margin-bottom: 72px;
}
.tl-item { position: relative; padding: 30px 22px 0 0; }
.tl-item::before {
  content: ""; position: absolute; left: 0; top: -5px; width: 10px; height: 10px;
  border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(4, 223, 0, .16);
}
.tl-year { font-family: var(--font-mono); font-size: 20px; font-weight: 700; color: var(--navy); }
.tl-item h3 { margin-top: 8px; font-size: 15.5px; color: var(--navy); }
.tl-item p { margin-top: 8px; font-size: 13.5px; line-height: 1.7; color: var(--ink-soft); }

.sites { margin-bottom: 72px; }
.sites-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 14px; margin-bottom: 26px; }
.sites-head h3 { font-size: 24px; color: var(--navy); }
.sites-head p { font-size: 15px; color: var(--ink-soft); }
.sites-grid { gap: 18px; }
.site-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; }
.site-card img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.site-card figcaption { padding: 16px 16px 18px; }
.site-card strong { display: block; font-size: 14px; color: var(--navy); font-family: var(--font-mono); letter-spacing: .04em; }
.site-card span { display: block; margin-top: 8px; font-size: 12.5px; line-height: 1.6; color: var(--gray-500); }

.values { margin-bottom: 72px; }
.values h3 { font-size: 24px; color: var(--navy); margin-bottom: 24px; }
.values ul { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 18px; }
.values li {
  padding: 22px 20px; border-radius: var(--radius-sm); background: var(--mist);
  border-top: 3px solid var(--green);
}
.values strong { display: block; font-size: 16px; color: var(--navy); }
.values span { display: block; margin-top: 8px; font-size: 13.5px; line-height: 1.7; color: var(--ink-soft); }

.usecases-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 14px; margin-bottom: 24px; }
.usecases--photo {
  position: relative; margin-top: 8px; padding: 46px 44px 44px; border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(0, 20, 64, .96), rgba(0, 32, 96, .82)),
              url("../img/bg-water-texture.jpg") center / cover no-repeat;
  overflow: hidden;
}
.usecases--photo .usecases-head h3 { color: #fff; }
.usecases--photo .usecases-head p { color: rgba(255, 255, 255, .76); }
.usecases--photo .usecase-card { background: rgba(255, 255, 255, .06); }
.usecases-head h3 { font-size: 24px; color: var(--navy); }
.usecases-head p { font-size: 15px; color: var(--ink-soft); }
.usecase-card { position: relative; border-radius: var(--radius); overflow: hidden; background: var(--navy); }
.usecase-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; opacity: .92; transition: transform .6s var(--ease); }
.usecase-card:hover img { transform: scale(1.04); }
.usecase-card figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 26px 24px;
  background: linear-gradient(transparent, rgba(0, 20, 64, .92) 62%); color: #fff;
}
.usecase-card strong { display: block; font-size: 18px; }
.usecase-card span { display: block; margin-top: 8px; font-size: 13.5px; line-height: 1.7; color: rgba(255, 255, 255, .82); }

/* ---------------------------------------------------------------- contact */
.contact-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 40px; }
.contact-info { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 34px 30px; }
.contact-info h3 { font-size: 21px; color: var(--navy); }
.info-list { margin-top: 24px; display: grid; gap: 16px; }
.info-list > div { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 14px; border-top: 1px solid var(--line); padding-top: 14px; }
.info-list dt { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--gray-500); line-height: 1.9; }
.info-list dd { font-size: 15px; color: var(--ink); line-height: 1.7; }
.info-list a { color: var(--navy); border-bottom: 1px solid rgba(0, 32, 96, .25); }
.info-list a:hover { color: var(--green-600); border-color: var(--green); }

.qr-block { margin-top: 28px; display: flex; align-items: center; gap: 18px; padding: 18px; border-radius: var(--radius-sm); background: var(--mist); }
.qr-block img { width: 104px; height: 104px; object-fit: cover; border-radius: 10px; background: #fff; }
.qr-block p { font-size: 14px; color: var(--ink-soft); line-height: 1.7; }

.inquiry-form {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px;
  box-shadow: var(--shadow-sm);
}
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 500; color: var(--navy); }
.field input, .field select, .field textarea {
  font-family: var(--font-sans); font-size: 15px; color: var(--ink);
  padding: 13px 15px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: #fcfeff; transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
  resize: vertical; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--green-600); box-shadow: 0 0 0 3px rgba(4, 223, 0, .16);
}
.field input.is-error, .field select.is-error { border-color: #dc3545; box-shadow: 0 0 0 3px rgba(220, 53, 69, .12); }
.form-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.form-hint { flex: 1 1 260px; font-size: 12.5px; line-height: 1.7; color: var(--gray-500); }
.form-status { grid-column: 1 / -1; font-size: 14px; color: var(--green-600); min-height: 1px; }
.form-status.is-error { color: #dc3545; }

/* ---------------------------------------------------------------- footer */
.site-footer { background: var(--navy-900); color: #fff; padding: 72px 0 34px; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); gap: 44px; }
.footer-lockup { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.footer-lockup .brand-cookitop { color: #fff; }
.footer-lockup .brand-divider { background: rgba(255, 255, 255, .25); }
.footer-lockup img { height: 24px; width: auto; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, .72); max-width: 420px; }
.footer-contact { margin-top: 18px; font-family: var(--font-mono); font-size: 14px; letter-spacing: .04em; }
.footer-contact a { color: var(--green); }
.footer-contact a:hover { color: #fff; }
.footer-links h4 { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .12em; text-transform: uppercase; color: rgba(255, 255, 255, .55); margin-bottom: 18px; font-weight: 400; }
.footer-links ul { display: grid; gap: 11px; }
.footer-links a { font-size: 14px; color: rgba(255, 255, 255, .82); transition: color .2s linear; }
.footer-links a:hover { color: var(--green); }
.footer-bottom {
  margin-top: 56px; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .14);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px;
  align-items: flex-start;
}
.footer-bottom p { font-size: 12.5px; line-height: 1.7; color: rgba(255, 255, 255, .55); }
.footer-legal { display: grid; gap: 8px; max-width: 780px; }
.footer-icp {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .02em;
  color: rgba(255, 255, 255, .62) !important;
}
.footer-icp a {
  color: rgba(255, 255, 255, .82); border-bottom: 1px solid rgba(255, 255, 255, .28);
  transition: color .2s linear, border-color .2s linear;
}
.footer-icp a:hover { color: var(--green); border-color: var(--green); }
.footer-icp-sep { color: rgba(255, 255, 255, .3); }
.footer-en { font-family: var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }

/* ---------------------------------------------------------------- misc */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 70;
  width: 46px; height: 46px; border-radius: 50%; background: var(--navy);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 12px 28px rgba(0, 32, 96, .28);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all .3s var(--ease);
}
.to-top svg { width: 18px; height: 18px; fill: none; stroke: var(--green); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--green); }
.to-top:hover svg { stroke: var(--navy); }

.reveal { transition: opacity .7s var(--ease), transform .7s var(--ease); }
/* the hidden start state is only applied once JS is running, so the page is
   fully readable if scripts are blocked or fail */
.js-reveal .reveal { opacity: 0; transform: translateY(22px); }
.js-reveal .reveal.is-in { opacity: 1; transform: none; }
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}

/* ---------------------------------------------------------------- responsive */
@media (max-width: 1180px) {
  .nav { gap: 22px; }
  .header-cta { display: none; }
}

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; padding-top: 64px; padding-bottom: 72px; }
  .hero-visual { justify-self: start; max-width: 380px; }
  .hero-stats-inner { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .stat { border-left: 1px solid rgba(255, 255, 255, .12); padding-left: 22px; }
  .stat:nth-child(3n + 1) { border-left: 0; padding-left: 0; }
  .stat:nth-child(n + 4) { border-top: 1px solid rgba(255, 255, 255, .12); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .timeline { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .timeline .tl-item { padding-bottom: 26px; }
  .values ul { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lab-band { grid-template-columns: 1fr; }
  .lab-media img { min-height: 240px; max-height: 300px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px; }
}

@media (max-width: 900px) {
  .nav {
    position: fixed; inset: 76px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 10px 24px 22px; margin: 0;
    box-shadow: 0 24px 40px rgba(0, 32, 96, .12);
    transform: translateY(-120%); transition: transform .35s var(--ease);
    max-height: calc(100vh - 76px); overflow-y: auto;
  }
  .nav.is-open { transform: none; }
  .nav-link { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav-link::after { display: none; }
  .menu-toggle { display: flex; }
  .header-actions { margin-left: auto; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 40px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-6 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .market-card--wide { flex-direction: column; grid-column: span 1; }
  .market-card--wide .market-media { flex: none; }
  .market-card--wide .market-media img { aspect-ratio: 16 / 9; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-info { padding: 28px 26px; }
  .inquiry-form { padding: 28px 26px; }
}

@media (max-width: 680px) {
  body { font-size: 15.5px; }
  .container { padding: 0 18px; }
  .brand-cookitop { font-size: 18px; letter-spacing: .18em; }
  .brand-cotherm { height: 22px; }
  .hero-stats-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat { padding: 20px 16px; }
  .stat:nth-child(3n + 1) { padding-left: 16px; }
  .stat:nth-child(odd) { border-left: 0; padding-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid rgba(255, 255, 255, .12); }
  .band-list { margin-left: 0; gap: 10px 20px; }
  .steps { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .values ul { grid-template-columns: 1fr; }
  .app-list--chips { grid-template-columns: 1fr; }
  .info-list > div { grid-template-columns: 1fr; gap: 4px; }
  .inquiry-form { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-badge { right: 8px; bottom: -18px; padding: 14px 18px; }
  .hero-badge-num { font-size: 26px; }
  .section-cta { padding: 24px 22px; }
  .lab-copy { padding: 30px 24px; }
  .to-top { right: 16px; bottom: 16px; }
}

@media (max-width: 420px) {
  .timeline { grid-template-columns: 1fr; }
  .timeline .tl-item { padding-bottom: 0; }
  .grid-6 { grid-template-columns: 1fr; }
}


/* ------------------------------------------------ product catalogue (3 levels) */
.nav-item { position: relative; }
.nav-link .caret { width: 8px; height: 8px; border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor; transform: rotate(45deg) translateY(-2px); }
.mega { position: absolute; left: 50%; top: 100%; transform: translateX(-50%) translateY(6px);
  min-width: 720px; max-width: 92vw; background: #fff; border: 1px solid var(--line);
  border-top: 2px solid var(--green); box-shadow: 0 24px 60px rgba(0, 32, 96, .16);
  padding: 24px 26px; display: none; z-index: 95; }
.nav-item.is-open .mega { display: block; }
.mega-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px 28px; }
.mega-cat { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--green-600); margin-bottom: 8px; font-weight: 700; }
.mega-list { display: grid; gap: 6px; }
.mega-list a { font-size: 14px; color: var(--ink-soft); }
.mega-list a:hover { color: var(--navy); }
.mega-foot { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; font-size: 13px; color: var(--gray-500); }
.catalog-toolbar { display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  justify-content: space-between; margin-bottom: 24px; }
.catalog-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.catalog-tab { border: 1px solid var(--line); background: #fff; color: var(--ink-soft);
  padding: 9px 15px; font-size: 14px; border-radius: 2px; transition: all .2s var(--ease); }
.catalog-tab:hover { border-color: var(--navy); color: var(--navy); }
.catalog-tab.is-active { background: var(--navy); border-color: var(--navy); color: #fff; }
.catalog-tab small { display: block; font-size: 11.5px; opacity: .78; }
.catalog-search { display: flex; gap: 8px; align-items: center; border: 1px solid var(--line);
  padding: 0 12px; min-width: 300px; background: #fff; }
.catalog-search input { flex: 1; border: 0; outline: none; padding: 12px 0; font-size: 14.5px; font-family: inherit; }
.catalog-search svg { width: 16px; height: 16px; fill: none; stroke: var(--gray-500); stroke-width: 2; }
.family-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.family-card { text-align: left; border: 1px solid var(--line); background: #fff;
  padding: 0 20px 18px; display: flex; flex-direction: column; gap: 8px; min-height: 190px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease); }
.family-card:hover { border-color: var(--navy); box-shadow: var(--shadow); transform: translateY(-2px); }
.family-card.is-active { border-color: var(--navy); border-left: 3px solid var(--green); }
.fc-media { display: block; margin: 0 -20px 14px; height: 140px; overflow: hidden; background: var(--mist); }
.fc-media img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.fc-zh { font-size: 16px; font-weight: 700; color: var(--navy); line-height: 1.4; }
.fc-count { margin-top: auto; font-size: 12.5px; color: var(--gray-500); }
.family-detail { margin-top: 24px; border: 1px solid var(--line); background: #fff; }
.family-detail-head { padding: 24px 26px; border-bottom: 1px solid var(--line); background: var(--mist); }
.family-detail-head h3 { font-size: 21px; color: var(--navy); }
.family-detail-head .fd-img { max-width: 320px; margin-bottom: 16px; border: 1px solid var(--line); background: #fff; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th { text-align: left; width: 180px; font-size: 13px; color: var(--gray-500);
  font-weight: 700; padding: 13px 26px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table td { padding: 13px 26px; border-bottom: 1px solid var(--line); font-size: 14.5px; color: var(--ink); }
.spec-table tr:hover td, .spec-table tr:hover th { background: var(--mist); }
.spec-src { padding: 14px 26px; font-size: 12.5px; color: var(--gray-500); }
.catalog-empty { padding: 36px 26px; color: var(--gray-500); }
.catalog-note { margin-top: 18px; padding: 16px 18px; border-left: 3px solid var(--green);
  background: var(--green-050); font-size: 13.5px; line-height: 1.75; color: #0a3d09; }
.catalog-search-panel { margin-bottom: 16px; }
@media (max-width: 1024px) {
  .family-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mega { min-width: 560px; }
  .mega-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
  .family-grid { grid-template-columns: 1fr; }
  .mega { position: static; transform: none; display: none; box-shadow: none; border: 0;
    border-top: 1px dashed var(--line); min-width: 0; padding: 12px 0 14px; }
  .nav-item.is-open .mega { display: block; }
  .mega-grid { grid-template-columns: 1fr; }
  .spec-table th { width: 110px; padding: 11px 16px; }
  .spec-table td { padding: 11px 16px; }
  .catalog-search { width: 100%; min-width: 0; }
}