:root {
    --bg: #F2EBD8;
    --bg-soft: #E8DEC2;
    --bg-deep: #0E0B07;
    --ink: #15110D;
    --ink-soft: #4A3F2E;
    --ink-muted: #8B7E66;
    --accent: #B8935A;
    --accent-deep: #8B6F3D;
    --accent-soft: #D4AF6F;
    --line: #CFC2A2;
    --line-soft: #DDD2B5;
    --paper: #F8F3E3;

    --font-display-en: 'Fraunces', 'Noto Serif SC', serif;
    --font-display-cn: 'Noto Serif SC', 'Fraunces', serif;
    --font-body-en: 'DM Sans', 'Noto Sans SC', sans-serif;
    --font-body-cn: 'Noto Sans SC', 'DM Sans', sans-serif;

    --max: 1320px;
    --pad: clamp(1.25rem, 4vw, 3rem);
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-body-cn);
    font-weight: 400;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  body.lang-en { font-family: var(--font-body-en); }

  /* paper grain texture overlay */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.4;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.4 0 0 0 0 0.3 0 0 0 0 0.2 0 0 0 0.08 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    mix-blend-mode: multiply;
  }

  /* lang visibility */
  [data-en] { display: none; }
  body.lang-en [data-cn] { display: none; }
  body.lang-en [data-en] { display: inline; }
  body.lang-en [data-en-block] { display: block; }
  body.lang-en [data-cn-block] { display: none !important; }
  [data-en-block] { display: none; }
  [data-cn-block] { display: block; }

  /* ===== Header ===== */
  header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 1.1rem var(--pad);
    background: rgba(244, 239, 230, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, padding 0.3s;
  }
  header.scrolled {
    border-bottom-color: var(--line);
    padding: 0.7rem var(--pad);
  }

  .header-inner {
    max-width: var(--max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    cursor: pointer;
    text-decoration: none;
    color: var(--ink);
  }
  .brand-mark {
    width: 38px; height: 38px;
    display: grid;
    place-items: center;
    background: var(--bg-deep);
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 50%;
    font-family: var(--font-display-en);
    font-weight: 500;
    font-style: italic;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
  }
  .brand-text { line-height: 1.1; }
  .brand-text .cn-name {
    font-family: var(--font-display-cn);
    font-weight: 600;
    font-size: 1.02rem;
    letter-spacing: 0.18em;
  }
  .brand-text .en-name {
    font-family: var(--font-display-en);
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.32em;
    color: var(--ink-soft);
    text-transform: uppercase;
    margin-top: 2px;
  }

  nav.primary {
    display: flex;
    gap: 2.2rem;
  }
  nav.primary a {
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    color: var(--ink);
    text-decoration: none;
    position: relative;
    padding-bottom: 4px;
    transition: color 0.2s;
    cursor: pointer;
  }
  nav.primary a::after {
    content: '';
    position: absolute;
    left: 0; right: 100%;
    bottom: 0;
    height: 1px;
    background: var(--accent);
    transition: right 0.3s;
  }
  nav.primary a:hover::after, nav.primary a.active::after { right: 0; }
  nav.primary a.active { color: var(--accent); }

  .lang-toggle {
    display: flex;
    align-items: center;
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    border: 1px solid var(--line);
    border-radius: 99px;
    overflow: hidden;
  }
  .lang-toggle button {
    background: transparent;
    border: none;
    padding: 0.42rem 0.85rem;
    color: var(--ink-soft);
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
  }
  .lang-toggle button.active {
    background: var(--ink);
    color: var(--bg);
  }

  .menu-btn {
    display: none;
    background: transparent;
    border: none;
    width: 32px; height: 32px;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
  }
  .menu-btn span {
    display: block;
    height: 1.5px;
    background: var(--ink);
    transition: transform 0.3s;
  }

  /* ===== Page system ===== */
  main { position: relative; z-index: 2; padding-top: 78px; }
  .page { display: none; animation: fadeUp 0.6s ease-out; }
  .page.active { display: block; }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* ===== Typography utilities ===== */
  .display {
    font-family: var(--font-display-cn);
    font-weight: 500;
    line-height: 1.05;
    letter-spacing: -0.01em;
  }
  body.lang-en .display { font-family: var(--font-display-en); font-weight: 400; }

  .eyebrow {
    font-family: var(--font-display-en);
    font-style: italic;
    font-size: 0.85rem;
    color: var(--accent);
    letter-spacing: 0.08em;
    font-weight: 400;
  }
  .eyebrow::before {
    content: '— ';
    margin-right: 0.2rem;
  }

  .container {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 var(--pad);
  }

  /* ===== HERO ===== */
  .hero {
    min-height: calc(100vh - 78px);
    padding: clamp(3rem, 8vw, 6rem) var(--pad) clamp(3rem, 6vw, 5rem);
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: center;
    max-width: var(--max);
    margin: 0 auto;
    position: relative;
  }
  .hero-text { position: relative; }
  .hero h1 {
    font-size: clamp(2.6rem, 6.2vw, 5.4rem);
    margin: 1.4rem 0 1.8rem;
  }
  .hero h1 .italic {
    font-family: var(--font-display-en);
    font-style: italic;
    font-weight: 300;
    color: var(--accent);
  }
  .hero p.lead {
    font-size: clamp(0.98rem, 1.2vw, 1.08rem);
    color: var(--ink-soft);
    max-width: 38ch;
    line-height: 1.75;
    margin-bottom: 2.2rem;
  }
  .hero-meta {
    display: flex;
    gap: clamp(1.5rem, 3vw, 2.6rem);
    padding-top: 2rem;
    border-top: 1px solid var(--line);
  }
  .hero-meta .stat .num {
    font-family: var(--font-display-en);
    font-size: 2.1rem;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.02em;
    line-height: 1;
  }
  .hero-meta .stat .label {
    font-size: 0.72rem;
    color: var(--ink-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 0.5rem;
  }

  .hero-visual {
    position: relative;
    aspect-ratio: 4/5;
    border-radius: 4px;
    overflow: hidden;
    background: linear-gradient(135deg, #1A1510 0%, #0A0807 60%, #000 100%);
    border: 1px solid var(--accent-deep);
  }
  .hero-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      repeating-linear-gradient(45deg, transparent 0, transparent 3px, rgba(184,147,90,0.08) 3px, rgba(184,147,90,0.08) 4px),
      repeating-linear-gradient(-45deg, transparent 0, transparent 3px, rgba(212,175,111,0.05) 3px, rgba(212,175,111,0.05) 4px);
  }
  .hero-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
      radial-gradient(ellipse at 25% 25%, rgba(212,175,111,0.18) 0%, transparent 50%),
      radial-gradient(ellipse at 75% 75%, rgba(184,147,90,0.12) 0%, transparent 50%);
  }
  .hero-visual .tag {
    position: absolute;
    bottom: 1.2rem; left: 1.2rem;
    color: var(--accent-soft);
    font-family: var(--font-display-en);
    font-style: italic;
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    z-index: 2;
  }
  .hero-visual .swatch-label {
    position: absolute;
    top: 1.2rem; right: 1.2rem;
    color: var(--accent);
    font-family: var(--font-display-en);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    z-index: 2;
  }

  /* ===== Marquee strip ===== */
  .strip {
    background: var(--bg-deep);
    color: var(--bg);
    padding: 1.1rem 0;
    overflow: hidden;
    position: relative;
    border-top: 1px solid var(--accent);
    border-bottom: 1px solid var(--accent);
  }
  .strip-track {
    display: flex;
    gap: 3rem;
    animation: scroll 38s linear infinite;
    white-space: nowrap;
    font-family: var(--font-display-en);
    font-size: 0.95rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
  }
  .strip-track span { display: inline-flex; align-items: center; gap: 3rem; }
  .strip-track span::after {
    content: '✦';
    color: var(--accent-soft);
    font-size: 0.7rem;
  }
  @keyframes scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
  }

  /* ===== Section base ===== */
  section.block {
    padding: clamp(4rem, 9vw, 7rem) 0;
  }
  section.block.alt {
    background: var(--bg-deep);
    color: var(--bg);
  }
  section.block.alt .display { color: var(--bg); }
  section.block.alt .eyebrow { color: var(--accent-soft); }
  section.block.alt .lead-text { color: rgba(242,235,216,0.65); }
  section.block.alt .pillar h3,
  section.block.alt .process-step h4 { color: var(--bg); }
  section.block.alt .pillar p,
  section.block.alt .process-step p { color: rgba(242,235,216,0.6); }
  section.block.alt .pillars { border-top-color: rgba(212,175,111,0.25); }
  section.block.alt .process-step { border-top-color: rgba(212,175,111,0.4); }
  section.block.alt .product-card {
    border: 1px solid rgba(212,175,111,0.25);
    transition: border-color 0.4s;
  }
  section.block.alt .product-card:hover {
    border-color: var(--accent);
  }
  section.block.alt .btn-line {
    color: var(--bg);
    border-color: var(--accent);
  }
  section.block.alt .btn-line:hover {
    background: var(--accent);
    color: var(--bg-deep);
  }

  .section-head {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 4rem;
    align-items: end;
  }
  .section-head h2 {
    font-size: clamp(2rem, 4vw, 3.2rem);
  }
  .section-head .lead-text {
    color: var(--ink-soft);
    line-height: 1.8;
    max-width: 52ch;
  }

  /* ===== About preview ===== */
  .pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.4rem;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--line);
  }
  .pillar .pillar-num {
    font-family: var(--font-display-en);
    font-style: italic;
    color: var(--accent);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
  }
  .pillar h3 {
    font-family: var(--font-display-cn);
    font-weight: 600;
    font-size: 1.18rem;
    margin-bottom: 0.7rem;
    letter-spacing: 0.02em;
  }
  body.lang-en .pillar h3 { font-family: var(--font-display-en); font-weight: 500; }
  .pillar p {
    color: var(--ink-soft);
    font-size: 0.92rem;
    line-height: 1.7;
  }

  /* ===== Product grid ===== */
  .product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
  }
  .product-card {
    aspect-ratio: 3/4;
    position: relative;
    overflow: hidden;
    background: var(--bg-soft);
    cursor: pointer;
    border-radius: 2px;
  }
  .product-card .swatch {
    position: absolute;
    inset: 0;
    transition: transform 0.7s cubic-bezier(.2,.7,.3,1);
  }
  .product-card:hover .swatch { transform: scale(1.04); }

  /* fabric swatch patterns — black with gold thread */
  .swatch-1 { background:
    repeating-linear-gradient(135deg, #1a1610 0px, #1a1610 2px, #0a0807 2px, #0a0807 5px),
    repeating-linear-gradient(45deg, transparent 0, transparent 4px, rgba(184,147,90,0.18) 4px, rgba(184,147,90,0.18) 5px);
    background-blend-mode: screen;
  }
  .swatch-2 { background:
    repeating-linear-gradient(90deg, #15110d 0, #15110d 8px, #0a0807 8px, #0a0807 10px),
    repeating-linear-gradient(0deg, transparent 0, transparent 7px, rgba(212,175,111,0.12) 7px, rgba(212,175,111,0.12) 9px);
  }
  .swatch-3 { background:
    radial-gradient(circle at 20% 30%, rgba(184,147,90,0.35) 0%, transparent 35%),
    radial-gradient(circle at 70% 60%, rgba(139,111,61,0.25) 0%, transparent 40%),
    linear-gradient(135deg, #1a1510 0%, #0a0807 100%);
  }
  .swatch-4 { background:
    repeating-linear-gradient(45deg, #1a1610 0, #1a1610 3px, #0a0807 3px, #0a0807 7px, #1a1610 7px, #1a1610 10px),
    repeating-linear-gradient(-45deg, transparent 0, transparent 9px, rgba(184,147,90,0.15) 9px, rgba(184,147,90,0.15) 11px);
  }
  .swatch-5 { background:
    linear-gradient(135deg, #d4af6f 0%, #b8935a 40%, #5C4019 100%);
  }
  .swatch-5::after {
    content: '';
    position: absolute; inset: 0;
    background-image: repeating-linear-gradient(0deg, transparent 0, transparent 3px, rgba(20,15,10,0.12) 3px, rgba(20,15,10,0.12) 4px);
  }
  .swatch-6 { background:
    repeating-linear-gradient(135deg, #1f1812 0, #1f1812 1px, #0a0807 1px, #0a0807 3px),
    linear-gradient(135deg, rgba(184,147,90,0.1) 0%, transparent 100%);
  }

  .product-card .meta {
    position: absolute;
    inset: 0;
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: rgba(255,240,220,0.92);
    z-index: 2;
  }
  .product-card .meta-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    font-family: var(--font-display-en);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    opacity: 0.8;
  }
  .product-card .meta-bottom h4 {
    font-family: var(--font-display-cn);
    font-weight: 500;
    font-size: 1.4rem;
    margin-bottom: 0.3rem;
    letter-spacing: 0.04em;
  }
  body.lang-en .product-card .meta-bottom h4 {
    font-family: var(--font-display-en);
    font-style: italic;
    font-weight: 400;
  }
  .product-card .meta-bottom p {
    font-size: 0.78rem;
    opacity: 0.75;
    letter-spacing: 0.05em;
  }
  .product-card::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.55) 0%, transparent 35%, transparent 70%, rgba(0,0,0,0.25) 100%);
    z-index: 1;
  }

  /* ===== Process / timeline ===== */
  .process {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
  }
  .process-step {
    padding-top: 1.5rem;
    border-top: 1px solid var(--ink);
    position: relative;
  }
  .process-step .step-num {
    font-family: var(--font-display-en);
    font-style: italic;
    font-weight: 300;
    font-size: 3rem;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 1rem;
  }
  .process-step h4 {
    font-family: var(--font-display-cn);
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 0.6rem;
  }
  body.lang-en .process-step h4 { font-family: var(--font-display-en); font-weight: 500; }
  .process-step p {
    font-size: 0.88rem;
    color: var(--ink-soft);
    line-height: 1.65;
  }

  /* ===== About page ===== */
  .about-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: center;
    padding: 4rem 0;
  }
  .about-hero h1 {
    font-size: clamp(2.4rem, 5vw, 4.2rem);
    margin: 1rem 0 2rem;
  }
  .about-hero p {
    color: var(--ink-soft);
    line-height: 1.8;
    margin-bottom: 1.2rem;
  }
  .about-visual {
    aspect-ratio: 4/5;
    background: linear-gradient(135deg, #1a1510 0%, #0a0807 100%);
    border: 1px solid var(--accent-deep);
    position: relative;
    overflow: hidden;
  }
  .about-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      repeating-linear-gradient(45deg, transparent 0, transparent 4px, rgba(184,147,90,0.08) 4px, rgba(184,147,90,0.08) 5px);
  }
  .about-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 40%, rgba(212,175,111,0.15) 0%, transparent 60%);
  }
  .about-visual .label {
    position: absolute;
    bottom: 1.5rem; left: 1.5rem;
    color: var(--accent-soft);
    font-family: var(--font-display-en);
    font-style: italic;
    font-size: 0.85rem;
    z-index: 2;
  }

  /* timeline */
  .timeline {
    position: relative;
    margin-top: 3rem;
  }
  .timeline::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0; bottom: 0;
    width: 1px;
    background: var(--line);
  }
  .timeline-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 3rem;
    padding: 2rem 0;
    position: relative;
  }
  .timeline-item::before {
    content: '';
    position: absolute;
    left: 76px; top: 2.3rem;
    width: 9px; height: 9px;
    background: var(--accent);
    border-radius: 50%;
    border: 2px solid var(--bg);
    box-shadow: 0 0 0 1px var(--accent);
  }
  .timeline-year {
    font-family: var(--font-display-en);
    font-weight: 400;
    font-size: 1.5rem;
    color: var(--accent);
  }
  .timeline-content h4 {
    font-family: var(--font-display-cn);
    font-weight: 600;
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
  }
  body.lang-en .timeline-content h4 { font-family: var(--font-display-en); font-weight: 500; }
  .timeline-content p {
    color: var(--ink-soft);
    line-height: 1.75;
    max-width: 60ch;
  }

  /* ===== capability stats ===== */
  .capabilities {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    padding: 3rem 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    margin: 4rem 0;
  }
  .cap {
    padding: 1rem 0;
  }
  .cap .cap-num {
    font-family: var(--font-display-en);
    font-size: clamp(2.4rem, 4vw, 3.4rem);
    font-weight: 300;
    color: var(--ink);
    line-height: 1;
    letter-spacing: -0.02em;
  }
  .cap .cap-num .unit {
    font-size: 0.5em;
    color: var(--accent);
    margin-left: 0.2rem;
  }
  .cap .cap-label {
    font-size: 0.78rem;
    color: var(--ink-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 0.8rem;
  }

  /* ===== Page header (for sub pages) ===== */
  .page-header {
    padding: clamp(3rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3.5rem);
    border-bottom: 1px solid var(--line);
    margin-bottom: clamp(3rem, 5vw, 4.5rem);
  }
  .page-header h1 {
    font-size: clamp(2.4rem, 5.5vw, 4.5rem);
    margin: 1rem 0 1.2rem;
  }
  .page-header .lead-text {
    color: var(--ink-soft);
    max-width: 60ch;
    line-height: 1.8;
  }

  /* ===== Products page ===== */
  .product-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
    margin-bottom: 4rem;
  }
  .product-detail {
    background: var(--paper);
    border: 1px solid var(--line-soft);
    padding: 1.8rem;
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 1.6rem;
    align-items: start;
    transition: border-color 0.3s, transform 0.3s;
  }
  .product-detail:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
  }
  .product-detail .pd-swatch {
    aspect-ratio: 1;
    width: 100%;
    border-radius: 2px;
  }
  .product-detail h3 {
    font-family: var(--font-display-cn);
    font-weight: 600;
    font-size: 1.3rem;
    margin-bottom: 0.4rem;
  }
  body.lang-en .product-detail h3 { font-family: var(--font-display-en); font-weight: 500; }
  .product-detail .pd-code {
    font-family: var(--font-display-en);
    font-style: italic;
    color: var(--accent);
    font-size: 0.82rem;
    margin-bottom: 0.9rem;
    letter-spacing: 0.08em;
  }
  .product-detail p {
    color: var(--ink-soft);
    font-size: 0.88rem;
    line-height: 1.65;
    margin-bottom: 0.8rem;
  }
  .product-detail .specs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .product-detail .specs span {
    font-size: 0.72rem;
    padding: 0.25rem 0.6rem;
    background: var(--bg-soft);
    border-radius: 99px;
    color: var(--ink-soft);
    letter-spacing: 0.04em;
  }

  /* ===== Applications page ===== */
  .applications {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  .app-card {
    border: 1px solid var(--line-soft);
    background: var(--paper);
    padding: 2rem;
    transition: all 0.3s;
  }
  .app-card:hover {
    border-color: var(--accent);
    background: var(--bg-soft);
  }
  .app-card .app-icon {
    width: 48px; height: 48px;
    border: 1px solid var(--ink);
    border-radius: 50%;
    display: grid;
    place-items: center;
    margin-bottom: 1.4rem;
    font-family: var(--font-display-en);
    font-style: italic;
    color: var(--accent);
  }
  .app-card h3 {
    font-family: var(--font-display-cn);
    font-weight: 600;
    font-size: 1.2rem;
    margin-bottom: 0.7rem;
  }
  body.lang-en .app-card h3 { font-family: var(--font-display-en); font-weight: 500; }
  .app-card p {
    color: var(--ink-soft);
    font-size: 0.9rem;
    line-height: 1.7;
  }

  /* ===== News page ===== */
  .news-list {
    display: flex;
    flex-direction: column;
  }
  .news-item {
    display: grid;
    grid-template-columns: 160px 1fr auto;
    gap: 2.5rem;
    padding: 2rem 0;
    border-top: 1px solid var(--line);
    align-items: center;
    transition: padding 0.3s;
    cursor: pointer;
  }
  .news-item:last-child { border-bottom: 1px solid var(--line); }
  .news-item:hover { padding-left: 1rem; padding-right: 1rem; }
  .news-item .news-date {
    font-family: var(--font-display-en);
    font-style: italic;
    color: var(--accent);
    font-size: 0.95rem;
  }
  .news-item h3 {
    font-family: var(--font-display-cn);
    font-weight: 500;
    font-size: 1.2rem;
    line-height: 1.4;
  }
  body.lang-en .news-item h3 { font-family: var(--font-display-en); font-weight: 400; }
  .news-item .arrow {
    font-family: var(--font-display-en);
    font-size: 1.5rem;
    color: var(--ink-muted);
    transition: transform 0.3s, color 0.3s;
  }
  .news-item:hover .arrow { transform: translateX(8px); color: var(--accent); }

  /* ===== Contact page ===== */
  .contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
  }
  .contact-info h3 {
    font-family: var(--font-display-cn);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.7rem;
    color: var(--accent);
    letter-spacing: 0.06em;
  }
  body.lang-en .contact-info h3 { font-family: var(--font-display-en); font-weight: 500; font-style: italic; }
  .contact-info .info-block {
    padding: 1.6rem 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .contact-info p {
    color: var(--ink-soft);
    line-height: 1.7;
  }
  .contact-info strong {
    display: block;
    color: var(--ink);
    font-weight: 500;
    margin-bottom: 0.3rem;
  }

  form.contact-form {
    background: var(--paper);
    padding: 2.2rem;
    border: 1px solid var(--line-soft);
  }
  form.contact-form h3 {
    font-family: var(--font-display-cn);
    font-weight: 600;
    font-size: 1.4rem;
    margin-bottom: 0.4rem;
  }
  body.lang-en form.contact-form h3 { font-family: var(--font-display-en); font-weight: 500; }
  form.contact-form .form-sub {
    color: var(--ink-soft);
    font-size: 0.88rem;
    margin-bottom: 1.8rem;
  }
  .field { margin-bottom: 1.2rem; }
  .field label {
    display: block;
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    color: var(--ink-soft);
    margin-bottom: 0.4rem;
  }
  .field input, .field textarea, .field select {
    width: 100%;
    padding: 0.75rem 0.9rem;
    background: var(--bg);
    border: 1px solid var(--line);
    font-family: inherit;
    font-size: 0.92rem;
    color: var(--ink);
    transition: border-color 0.2s;
  }
  .field input:focus, .field textarea:focus, .field select:focus {
    outline: none;
    border-color: var(--accent);
  }
  .field textarea { min-height: 120px; resize: vertical; }
  .btn {
    background: var(--ink);
    color: var(--bg);
    border: none;
    padding: 0.95rem 2.4rem;
    font-family: inherit;
    font-size: 0.88rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.2s;
  }
  .btn:hover { background: var(--accent-deep); }

  .btn-line {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--ink);
    padding: 0.85rem 1.8rem;
    font-family: inherit;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
  }
  .btn-line:hover {
    background: var(--ink);
    color: var(--bg);
  }
  .btn-line .arrow {
    transition: transform 0.3s;
    font-family: var(--font-display-en);
  }
  .btn-line:hover .arrow { transform: translateX(4px); }

  /* ===== Footer ===== */
  footer {
    background: var(--bg-deep);
    color: var(--bg);
    padding: clamp(3rem, 6vw, 5rem) var(--pad) 2rem;
    position: relative;
    z-index: 2;
  }
  .footer-inner {
    max-width: var(--max);
    margin: 0 auto;
  }
  .footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255,240,220,0.15);
  }
  .footer-brand .brand-mark {
    background: transparent;
    border-color: var(--accent);
    color: var(--accent);
  }
  .footer-brand .cn-name, .footer-brand .en-name { color: var(--bg); }
  .footer-brand .en-name { color: rgba(255,240,220,0.55); }
  .footer-brand p {
    color: rgba(255,240,220,0.6);
    font-size: 0.88rem;
    margin-top: 1.4rem;
    max-width: 32ch;
    line-height: 1.7;
  }
  .footer-col h5 {
    font-family: var(--font-display-en);
    font-style: italic;
    font-weight: 400;
    color: var(--accent-soft);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    margin-bottom: 1.2rem;
  }
  .footer-col a, .footer-col p {
    display: block;
    color: rgba(255,240,220,0.7);
    text-decoration: none;
    font-size: 0.88rem;
    padding: 0.25rem 0;
    transition: color 0.2s;
    cursor: pointer;
  }
  .footer-col a:hover { color: var(--bg); }
  .footer-bottom {
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    color: rgba(255,240,220,0.4);
    letter-spacing: 0.06em;
  }

  /* ===== Mobile ===== */
  @media (max-width: 900px) {
    nav.primary { display: none; }
    nav.primary.open {
      display: flex;
      position: fixed;
      top: 70px;
      left: 0; right: 0;
      flex-direction: column;
      background: var(--bg);
      padding: 2rem var(--pad);
      gap: 1.2rem;
      border-bottom: 1px solid var(--line);
    }
    .menu-btn { display: flex; }
    .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 4rem; padding-bottom: 4rem; }
    .hero-visual { aspect-ratio: 1; max-height: 50vh; }
    .section-head { grid-template-columns: 1fr; gap: 1.5rem; }
    .pillars { grid-template-columns: 1fr; gap: 1.8rem; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .process { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
    .about-hero { grid-template-columns: 1fr; }
    .capabilities { grid-template-columns: 1fr 1fr; }
    .applications { grid-template-columns: 1fr; }
    .product-detail-grid { grid-template-columns: 1fr; }
    .product-detail { grid-template-columns: 100px 1fr; gap: 1.2rem; padding: 1.4rem; }
    .news-item { grid-template-columns: 1fr; gap: 0.6rem; }
    .news-item .arrow { display: none; }
    .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; gap: 0.8rem; align-items: flex-start; }
    .timeline::before { left: 50px; }
    .timeline-item { grid-template-columns: 50px 1fr; gap: 1.5rem; }
    .timeline-item::before { left: 46px; }
  }