/* ------------------------------------------------------------------ base */
:root {
    --accent: #E8590C;
    --ink: #1a1a1a;
    --ink-soft: #55565a;
    --paper: #ffffff;
    --tint: #f5f4f2;
    --line: #e7e5e1;
    --radius: 12px;
    --shadow: 0 20px 40px -18px rgba(26, 26, 26, .25);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
        "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 1.05rem;
    line-height: 1.65;
    color: var(--ink);
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }

.wrap { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
.wrap--narrow { max-width: 960px; }

/* --------------------------------------------------------------- topbar */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
}

.topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.brand {
    display: flex;
    align-items: center;
    gap: .7rem;
    text-decoration: none;
}

.brand__logo { height: 42px; width: auto; }

.brand__name { font-weight: 800; letter-spacing: .02em; }

.nav { display: flex; gap: 1.4rem; }

.nav a {
    text-decoration: none;
    font-size: .88rem;
    font-weight: 600;
    color: var(--ink-soft);
    padding: .3rem 0;
    border-bottom: 2px solid transparent;
}

.nav a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ----------------------------------------------------------------- hero */
.hero {
    position: relative;
    min-height: 86vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    background: #141414 center / cover no-repeat;
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 10, 12, .55), rgba(10, 10, 12, .25) 55%, rgba(10, 10, 12, .6));
}

.hero__inner { position: relative; z-index: 1; padding: 4rem 1.5rem; }

.hero__cn {
    font-size: clamp(2.4rem, 6vw, 4.6rem);
    font-weight: 800;
    letter-spacing: .08em;
    margin: 0 0 .6rem;
    text-shadow: 0 4px 30px rgba(0, 0, 0, .4);
}

.hero__en {
    font-size: clamp(1rem, 2.2vw, 1.5rem);
    font-weight: 600;
    letter-spacing: .3em;
    margin: 0 0 1.6rem;
    color: rgba(255, 255, 255, .9);
}

.hero__sub {
    display: inline-block;
    font-size: .8rem;
    letter-spacing: .35em;
    font-weight: 700;
    color: #fff;
    background: var(--accent);
    padding: .5rem 1.3rem;
    border-radius: 999px;
}

/* ------------------------------------------------------------- sections */
.section { padding: 88px 0; }
.section--tinted { background: var(--tint); }
.section--dark { background: #16161a; color: #fff; }

.section__head {
    max-width: 46em;
    margin-bottom: 2.8rem;
}

.section__head--center { margin-left: auto; margin-right: auto; text-align: center; }

.sec-cn {
    font-size: 1.9rem;
    font-weight: 800;
    letter-spacing: .06em;
    margin: 0 0 .2rem;
}

.sec-en {
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 .8rem;
}

.section__intro { color: var(--ink-soft); margin: 0; font-size: 1.05rem; }
.section--dark .section__intro { color: #b9babf; }

.kicker {
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 1rem;
}

/* ----------------------------------------------------------------- about */
.about__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr 1fr;
    gap: 40px;
    align-items: center;
}

.about__photo { border-radius: var(--radius); box-shadow: var(--shadow); }
.about__photo img { border-radius: var(--radius); }
.about__text { font-size: 1.02rem; color: var(--ink); }
.about__text p { margin: 0 0 1.1rem; }

/* ------------------------------------------------------------- products */
.cat-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: .7rem;
    padding: 0;
    margin: 0 0 2.4rem;
}

.cat-list li {
    background: var(--paper);
    border: 1px solid var(--line);
    border-left: 4px solid var(--accent);
    border-radius: 8px;
    padding: .85rem 1.1rem;
    font-weight: 700;
    font-size: .92rem;
    letter-spacing: .01em;
}

.grid { display: grid; gap: 16px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--6 { grid-template-columns: repeat(6, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); gap: 24px; }

.card {
    margin: 0;
    overflow: hidden;
    border-radius: var(--radius);
    background: #eceae7;
}

.card__link {
    display: block;
    border-radius: var(--radius);
    overflow: hidden;
    background: #eceae7;
}

.card__link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .45s cubic-bezier(.2, .7, .2, 1);
}

.card__link:hover img { transform: scale(1.045); }

/* ------------------------------------------------------------ advantages */
.adv__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
    margin-top: 1.5rem;
}

.adv {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 6px 20px -12px rgba(26, 26, 26, .18);
}

.adv__photo { display: flex; justify-content: center; background: #eceae7; padding: 1rem 0; }
.adv__photo img { width: auto; max-width: 88%; height: auto; }

.adv__body { padding: 1.3rem 1.4rem 1.5rem; }

.adv__title {
    font-size: .95rem;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 .6rem;
}

.adv__text { font-size: .95rem; color: var(--ink-soft); margin: 0; }

.adv__team {
    text-align: center;
    margin-top: 3rem;
}

.adv__team strong {
    display: inline-block;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 800;
    letter-spacing: .04em;
    border-bottom: 4px solid var(--accent);
    padding-bottom: .2rem;
}

/* ---------------------------------------------------------------- brands */
.brandwall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
}

.brandwall .card__link {
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.1rem;
    border: 1px solid var(--line);
    border-radius: 10px;
}

.brandwall img {
    max-height: 74px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    filter: grayscale(.15);
    transition: transform .2s ease;
}

.brandwall .card__link:hover img { transform: scale(1.06); filter: none; }

/* ------------------------------------------------------------ fact cards */
.facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.fact {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.4rem 1.5rem;
}

.fact__label {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin: 0 0 .35rem;
}

.fact__value { font-size: 1.45rem; font-weight: 800; margin: 0; }
.fact__value small { font-size: .85rem; font-weight: 600; color: var(--ink-soft); }
.fact--wide { grid-column: span 3; }

/* ----------------------------------------------------------- org chart */
.org {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
}

.org__dept {
    background: var(--paper);
    border: 1px solid var(--line);
    border-top: 4px solid var(--accent);
    border-radius: 10px;
    padding: 1rem 1rem 1.1rem;
}

.org__dept h3 {
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin: 0 0 .7rem;
    text-align: center;
}

.org__dept ul { list-style: none; margin: 0; padding: 0; }

.org__dept li {
    font-size: .85rem;
    color: var(--ink-soft);
    text-align: center;
    padding: .32rem .2rem;
    border-top: 1px dashed var(--line);
}

/* ------------------------------------------------------------ equipment */
.equipment { width: 100%; border-collapse: collapse; }

.equipment th, .equipment td {
    padding: .6rem .9rem;
    text-align: left;
    border-bottom: 1px solid var(--line);
    font-size: .92rem;
}

.equipment th {
    font-size: .75rem;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ink-soft);
    background: var(--tint);
}

.equipment td:nth-child(even) { color: var(--accent); font-weight: 700; }

/* -------------------------------------------------------------- gallery */
.gal__group { margin-bottom: 2.6rem; }
.gal__group:last-child { margin-bottom: 0; }

.gal__title {
    font-size: 1.05rem;
    font-weight: 800;
    margin: 0 0 1rem;
    display: flex;
    align-items: baseline;
    gap: .6rem;
}

.gal__title span {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--accent);
}

/* machines with captions */
.mach__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

.mach { margin: 0; }

.mach img {
    width: 100%;
    aspect-ratio: 4 / 3.2;
    object-fit: cover;
    border-radius: var(--radius);
    transition: transform .4s ease;
}

.mach:hover img { transform: scale(1.03); }

.mach figcaption {
    text-align: center;
    font-weight: 700;
    font-size: .9rem;
    margin-top: .6rem;
    color: var(--ink);
}

/* ------------------------------------------------------------------ cta */
.cta { text-align: center; padding: 100px 0; }

.cta__cn {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    letter-spacing: .2em;
    margin: 0 0 .4rem;
}

.cta__en {
    font-size: .8rem;
    letter-spacing: .3em;
    font-weight: 700;
    color: #b9babf;
    margin: 0 0 1.8rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .85rem 1.9rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: .95rem;
    text-decoration: none;
    background: var(--accent);
    color: #fff;
    transition: transform .15s ease, box-shadow .15s ease;
}

.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

/* --------------------------------------------------------------- footer */
.footer {
    border-top: 1px solid var(--line);
    padding: 26px 0;
    font-size: .85rem;
    color: var(--ink-soft);
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .6rem;
}

.footer p { margin: 0; }
.footer a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line); }
.footer a:hover { color: var(--accent); }

/* -------------------------------------------------------------- lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(12, 12, 14, .93);
}

.lightbox.is-open { display: flex; }

.lightbox img {
    max-width: 92vw;
    max-height: 90vh;
    border-radius: 6px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
}

.lightbox__btn {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, .1);
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

.lightbox__btn:hover { background: rgba(255, 255, 255, .25); }
.lightbox__close { top: 22px; right: 26px; }
.lightbox__prev { left: 22px; }
.lightbox__next { right: 22px; }

/* ------------------------------------------------------------ responsive */
@media (max-width: 1024px) {
    .nav { display: none; }
    .about__grid { grid-template-columns: 1fr 1fr; }
    .about__grid .about__photo:first-child { display: none; }
    .org { grid-template-columns: repeat(3, 1fr); }
    .adv__grid { grid-template-columns: 1fr; }
    .facts { grid-template-columns: 1fr 1fr; }
    .fact--wide { grid-column: span 2; }
    .mach__grid { grid-template-columns: 1fr 1fr; }
    .grid--4 { grid-template-columns: repeat(3, 1fr); }
    .grid--6 { grid-template-columns: repeat(4, 1fr); }
    .grid--2 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .about__grid { grid-template-columns: 1fr; }
    .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--6 { grid-template-columns: repeat(3, 1fr); }
    .grid--2 { grid-template-columns: 1fr; }
    .org { grid-template-columns: 1fr 1fr; }
    .facts { grid-template-columns: 1fr; }
    .fact--wide { grid-column: span 1; }
    .mach__grid { grid-template-columns: 1fr; }
    .section { padding: 56px 0; }
}

/* single full-width certificate image - no cropping, natural aspect */
.cert-full { margin: 0; }
.cert-full .card__link { display: block; border-radius: var(--radius); overflow: hidden; background: #fff; }
.cert-full img { width: 100%; height: auto; border-radius: var(--radius); }

/* factory photos: unified card style */
#factory .grid--2 .card__link img {
    aspect-ratio: 3 / 2;
    object-fit: cover;
}