/* ==========================================================
   赛奥金细胞科技 SAIAOJIN — 官网设计系统
   主色：香槟金 / 象牙白 / 墨金；风格：大气、质感、留白
   ========================================================== */
:root {
    --gold: #b9965a;
    --gold-2: #d8b979;
    --gold-3: #f0dfb6;
    --gold-deep: #8a6d33;
    --ink: #1d1a15;
    --ink-2: #3a352d;
    --gray: #6f6a62;
    --gray-2: #9a958c;
    --line: #e8e3d9;
    --bg: #ffffff;
    --bg-warm: #faf7f1;
    --bg-dark: #14120e;
    --radius: 4px;
    --radius-lg: 14px;
    --shadow: 0 18px 50px -22px rgba(60, 44, 20, .28);
    --shadow-sm: 0 8px 24px -14px rgba(60, 44, 20, .3);
    --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", sans-serif;
    --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
    --container: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0; font-family: var(--font); color: var(--ink-2); background: var(--bg);
    font-size: 15px; line-height: 1.75; -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
a:hover { color: var(--gold); }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { color: var(--ink); font-weight: 600; margin: 0; line-height: 1.3; }
p { margin: 0 0 1em; }
::selection { background: var(--gold-3); color: var(--ink); }

.container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }
.serif { font-family: var(--serif); }
.text-gold { color: var(--gold); }
.text-center { text-align: center; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; gap: 10px; justify-content: center;
    height: 48px; padding: 0 30px; border-radius: 999px; font-size: 14px; letter-spacing: .12em;
    border: 1px solid transparent; cursor: pointer; transition: all .3s ease; white-space: nowrap; font-family: inherit;
}
.btn-gold {
    color: #fff; background: linear-gradient(135deg, #c9a86a, #a9834a);
    box-shadow: 0 10px 24px -12px rgba(169, 131, 74, .8);
}
.btn-gold:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 16px 32px -14px rgba(169, 131, 74, .9); }
.btn-ghost { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn-ghost:hover { background: #fff; color: var(--ink); border-color: #fff; }
.btn-outline-light { border-color: rgba(138, 109, 51, .45); color: var(--gold-deep); background: rgba(255, 255, 255, .5); }
.btn-outline-light:hover { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn-line { border-color: var(--gold); color: var(--gold-deep); }
.btn-line:hover { background: var(--gold); color: #fff; }
.btn .arrow { transition: transform .3s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- 顶栏 ---------- */
.topbar {
    background: var(--bg-dark); color: rgba(255, 255, 255, .62); font-size: 12.5px; letter-spacing: .06em;
    height: 38px; display: flex; align-items: center;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; }
.topbar a:hover { color: var(--gold-2); }
.topbar .sep { margin: 0 12px; opacity: .35; }
.topbar .phone b { color: var(--gold-2); font-size: 14px; letter-spacing: .04em; margin-left: 6px; }

/* ---------- 导航 ---------- */
.header {
    position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, .92);
    backdrop-filter: saturate(180%) blur(14px); border-bottom: 1px solid rgba(232, 227, 217, .8);
    transition: box-shadow .3s;
}
.header.scrolled { box-shadow: 0 10px 30px -24px rgba(40, 30, 10, .55); }
.header .container { display: flex; align-items: center; height: 84px; gap: 40px; }
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo img { width: 46px; height: 46px; }
.logo .logo-text { line-height: 1.15; }
.logo .logo-en { font-family: "Times New Roman", var(--serif); font-size: 21px; letter-spacing: .22em; color: var(--ink); font-weight: 600; }
.logo .logo-cn { font-size: 11.5px; letter-spacing: .5em; color: var(--gray); margin-top: 3px; }

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav > li { position: relative; }
.nav > li > a {
    display: block; padding: 10px 18px; font-size: 15px; color: var(--ink-2); letter-spacing: .06em; position: relative;
}
.nav > li > a::after {
    content: ""; position: absolute; left: 18px; right: 18px; bottom: 2px; height: 1.5px; background: var(--gold);
    transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.nav > li > a:hover::after, .nav > li.active > a::after { transform: scaleX(1); }
.nav > li.active > a { color: var(--gold-deep); }
.nav > li:hover > a { color: var(--gold-deep); }
.header-cta { margin-left: 8px; height: 42px; padding: 0 22px; font-size: 13px; }

.dropdown {
    position: absolute; top: 100%; left: 50%; transform: translate(-50%, 8px); min-width: 220px; padding: 10px;
    background: #fff; border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow);
    opacity: 0; visibility: hidden; transition: all .28s ease;
}
.nav > li:hover .dropdown { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.dropdown a { display: block; padding: 9px 14px; border-radius: 6px; font-size: 14px; color: var(--ink-2); }
.dropdown a:hover { background: var(--bg-warm); color: var(--gold-deep); }
.dropdown .dd-title { font-size: 11px; letter-spacing: .2em; color: var(--gray-2); padding: 6px 14px 8px; text-transform: uppercase; }

.menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 8px; background: #fff; cursor: pointer; align-items: center; justify-content: center; }
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
    content: ""; display: block; width: 18px; height: 1.5px; background: var(--ink); position: relative; transition: .25s;
}
.menu-toggle span::before { position: absolute; top: -6px; }
.menu-toggle span::after { position: absolute; top: 6px; }

/* ---------- 通用区块标题 ---------- */
.section { padding: 110px 0; position: relative; }
.section-warm { background: var(--bg-warm); }
.section-dark { background: var(--bg-dark); color: rgba(255, 255, 255, .7); }
.section-dark h2, .section-dark h3, .section-dark h4 { color: #fff; }

.sec-head { margin-bottom: 56px; }
.sec-head.center { text-align: center; }
.sec-eyebrow {
    display: inline-flex; align-items: center; gap: 12px; font-size: 12px; letter-spacing: .34em;
    color: var(--gold); text-transform: uppercase; font-weight: 500; margin-bottom: 14px;
}
.sec-eyebrow::before, .sec-head.center .sec-eyebrow::after { content: ""; width: 28px; height: 1px; background: var(--gold); opacity: .7; }
.sec-eyebrow::before { display: none; }
.sec-head.center .sec-eyebrow::before { display: block; }
.sec-title { font-family: var(--serif); font-size: 40px; letter-spacing: .06em; font-weight: 600; }
.sec-title em { font-style: normal; color: var(--gold); }
.sec-desc { margin-top: 16px; color: var(--gray); font-size: 15.5px; max-width: 640px; }
.sec-head.center .sec-desc { margin-left: auto; margin-right: auto; }
.sec-head.flex { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; flex-wrap: wrap; }

/* ---------- 首页 Hero ---------- */
.hero { position: relative; overflow: hidden; background: #f4eee4; }
.hero-slide { position: relative; min-height: min(88vh, 820px); display: flex; align-items: center; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; object-position: center 30%; }
.hero-bg::after {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(250, 246, 239, .98) 0%, rgba(250, 246, 239, .94) 30%, rgba(250, 246, 239, .62) 48%, rgba(250, 246, 239, .04) 72%, rgba(250, 246, 239, 0) 100%);
}
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 640px; padding: 90px 0; }
.hero-tag {
    display: inline-flex; align-items: center; gap: 10px; padding: 7px 18px; border-radius: 999px;
    background: rgba(255, 255, 255, .7); border: 1px solid rgba(185, 150, 90, .4); color: var(--gold-deep);
    font-size: 12.5px; letter-spacing: .24em; margin-bottom: 28px;
}
.hero-tag i { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); display: inline-block; }
.hero-title { font-family: var(--serif); font-size: clamp(40px, 5vw, 66px); letter-spacing: .08em; line-height: 1.22; font-weight: 600; color: var(--ink); }
.hero-title .line { display: block; }
.hero-title .grad {
    background: linear-gradient(100deg, #8a6d33, #cbaa6b 45%, #8a6d33);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin: 26px 0 36px; font-size: 17px; color: var(--gray); letter-spacing: .08em; line-height: 1.9; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 48px; margin-top: 56px; padding-top: 30px; border-top: 1px solid rgba(138, 109, 51, .22); }
.hero-stats .num { font-family: "Times New Roman", var(--serif); font-size: 40px; color: var(--ink); line-height: 1; }
.hero-stats .num small { font-size: 16px; color: var(--gold); margin-left: 3px; }
.hero-stats .label { font-size: 13px; color: var(--gray); margin-top: 8px; letter-spacing: .1em; }
.hero-scroll {
    position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); z-index: 3;
    font-size: 11px; letter-spacing: .3em; color: var(--gray); display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.hero-scroll::after { content: ""; width: 1px; height: 34px; background: linear-gradient(var(--gold), transparent); animation: scrollHint 2s infinite; }
@keyframes scrollHint { 0% { transform: scaleY(.3); transform-origin: top; opacity: 0; } 50% { transform: scaleY(1); opacity: 1; } 100% { transform: scaleY(.3); transform-origin: bottom; opacity: 0; } }

/* ---------- 品牌介绍 ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 70px; align-items: center; }
.about-media { position: relative; }
.about-media .main-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 4/3.1; }
.about-media .main-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s ease; }
.about-media:hover .main-img img { transform: scale(1.04); }
.about-media .badge {
    position: absolute; right: -22px; bottom: -26px; width: 190px; padding: 22px 18px; background: var(--bg-dark); color: #fff;
    border-radius: 12px; text-align: center; border: 1px solid rgba(216, 185, 121, .35);
}
.about-media .badge .n { font-family: "Times New Roman", var(--serif); font-size: 38px; color: var(--gold-2); line-height: 1; }
.about-media .badge .t { font-size: 12.5px; letter-spacing: .16em; color: rgba(255, 255, 255, .72); margin-top: 8px; }
.about-media .frame { position: absolute; left: -22px; top: -22px; width: 120px; height: 120px; border-left: 1px solid var(--gold); border-top: 1px solid var(--gold); opacity: .8; }
.about-text .sec-title { font-size: 36px; }
.about-text p { color: var(--gray); }
.about-points { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 26px; margin-top: 30px; }
.about-points li { display: flex; gap: 12px; align-items: flex-start; font-size: 14.5px; color: var(--ink-2); }
.about-points li svg { flex-shrink: 0; margin-top: 5px; }

/* ---------- 技术 ---------- */
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tech-card {
    position: relative; padding: 38px 34px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff;
    transition: all .4s ease; overflow: hidden;
}
.tech-card::before {
    content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
    background: linear-gradient(90deg, var(--gold), var(--gold-3)); transform: scaleX(0); transform-origin: left; transition: transform .5s ease;
}
.tech-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(185, 150, 90, .35); }
.tech-card:hover::before { transform: scaleX(1); }
.tech-icon {
    width: 58px; height: 58px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 24px;
    background: linear-gradient(145deg, #faf4e6, #f1e4c6); color: var(--gold-deep);
}
.tech-card .en { font-size: 11px; letter-spacing: .24em; color: var(--gold); margin-bottom: 8px; text-transform: uppercase; }
.tech-card h3 { font-size: 20px; margin-bottom: 12px; letter-spacing: .04em; }
.tech-card p { color: var(--gray); font-size: 14.5px; margin: 0; }

/* ---------- 产品 ---------- */
.cat-tabs { display: flex; gap: 10px; flex-wrap: wrap; }
.cat-tabs a {
    padding: 9px 22px; border-radius: 999px; border: 1px solid var(--line); font-size: 14px; color: var(--ink-2); background: #fff;
}
.cat-tabs a:hover { border-color: var(--gold); color: var(--gold-deep); }
.cat-tabs a.active { background: var(--ink); border-color: var(--ink); color: #fff; }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.product-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line); transition: all .4s ease; display: flex; flex-direction: column; }
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: rgba(185, 150, 90, .4); }
.product-media { position: relative; aspect-ratio: 1/1.08; overflow: hidden; background: #f7f2e9; }
.product-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.product-card:hover .product-media img { transform: scale(1.06); }
.product-media .spec {
    position: absolute; left: 14px; top: 14px; padding: 4px 12px; font-size: 12px; border-radius: 999px;
    background: rgba(255, 255, 255, .86); color: var(--gold-deep); letter-spacing: .06em; backdrop-filter: blur(6px);
}
.product-media .quick {
    position: absolute; inset: auto 0 0 0; padding: 14px; text-align: center; font-size: 13px; letter-spacing: .2em;
    color: #fff; background: linear-gradient(transparent, rgba(20, 18, 14, .72)); opacity: 0; transform: translateY(10px); transition: all .35s ease;
}
.product-card:hover .product-media .quick { opacity: 1; transform: none; }
.product-body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.product-cat { font-size: 12px; color: var(--gold); letter-spacing: .2em; }
.product-body h3 { font-size: 19px; margin: 8px 0 6px; letter-spacing: .03em; }
.product-body h3 a:hover { color: var(--gold-deep); }
.product-body .en { font-size: 10.5px; letter-spacing: .16em; color: var(--gray-2); text-transform: uppercase; min-height: 16px; }
.product-body p { font-size: 13.5px; color: var(--gray); margin: 12px 0 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 14px; }
.product-tags span { font-size: 11.5px; padding: 3px 10px; border-radius: 999px; background: var(--bg-warm); color: var(--ink-2); border: 1px solid var(--line); }

/* ---------- 实验室 / 深色区 ---------- */
.dark-split { display: grid; grid-template-columns: 1fr 1fr; gap: 0; align-items: stretch; border-radius: var(--radius-lg); overflow: hidden; }
.dark-split .media { position: relative; min-height: 460px; }
.dark-split .media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.dark-split .body { background: var(--bg-dark); padding: 64px 58px; color: rgba(255, 255, 255, .68); display: flex; flex-direction: column; justify-content: center; }
.dark-split .body .sec-title { color: #fff; font-size: 34px; }
.dark-split .body p { color: rgba(255, 255, 255, .62); }
.check-list { display: grid; gap: 14px; margin: 26px 0 34px; }
.check-list li { display: flex; gap: 14px; font-size: 14.5px; color: rgba(255, 255, 255, .78); }
.check-list li svg { flex-shrink: 0; margin-top: 3px; }

/* ---------- 数据 ---------- */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(138, 109, 51, .25); }
.stat { padding: 34px 10px; text-align: center; border-right: 1px solid rgba(138, 109, 51, .18); }
.stat:last-child { border-right: 0; }
.stat .num { font-family: "Times New Roman", var(--serif); font-size: 48px; color: var(--gold); line-height: 1; }
.stat .num small { font-size: 20px; margin-left: 2px; }
.stat .label { margin-top: 10px; font-size: 13.5px; letter-spacing: .14em; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.news-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line); display: flex; flex-direction: column; transition: all .35s ease; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.news-cover { aspect-ratio: 16/9.5; overflow: hidden; background: linear-gradient(135deg, #f3ead9, #e6d6b6); position: relative; }
.news-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s; }
.news-card:hover .news-cover img { transform: scale(1.05); }
.news-cover .ph { position: absolute; inset: 0; display: grid; place-items: center; }
.news-cover .ph-inner, .news-row .cover .ph-inner { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.news-row .cover .ph-inner img { width: 46px; opacity: .55; }
.news-cover .ph-inner img { width: 54px; opacity: .5; }
.news-cover .ph-inner span, .news-row .cover .ph-inner span { font-family: "Times New Roman", serif; letter-spacing: .4em; font-size: 13px; color: rgba(255, 255, 255, .9); text-shadow: 0 1px 6px rgba(120, 90, 40, .25); }
.news-body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.news-meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--gray-2); }
.news-meta .cat { color: var(--gold-deep); padding: 2px 10px; border-radius: 999px; background: var(--bg-warm); border: 1px solid var(--line); }
.news-body h3 { font-size: 18px; margin: 12px 0 10px; line-height: 1.5; }
.news-body h3 a:hover { color: var(--gold-deep); }
.news-body p { font-size: 13.5px; color: var(--gray); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin: 0; }
.news-more { margin-top: auto; padding-top: 16px; font-size: 13px; color: var(--gold-deep); letter-spacing: .12em; display: inline-flex; align-items: center; gap: 6px; }

/* ---------- CTA ---------- */
.cta {
    position: relative; padding: 90px 0; overflow: hidden; color: #fff; text-align: center;
    background: radial-gradient(120% 120% at 50% 0%, #3a3020 0%, #14120e 62%);
}
.cta::before, .cta::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(216, 185, 121, .16); }
.cta::before { width: 640px; height: 640px; left: -220px; top: -260px; }
.cta::after { width: 520px; height: 520px; right: -180px; bottom: -300px; }
.cta .eyebrow { font-size: 12px; letter-spacing: .4em; color: var(--gold-2); }
.cta h2 { color: #fff; font-family: var(--serif); font-size: 40px; letter-spacing: .08em; margin: 16px 0 18px; }
.cta p { color: rgba(255, 255, 255, .62); max-width: 620px; margin: 0 auto 34px; }
.cta .actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 2; }

/* ---------- 页头 banner ---------- */
.page-hero {
    position: relative; min-height: 380px; display: flex; align-items: center; color: #fff; overflow: hidden;
    background: linear-gradient(110deg, #17140f 0%, #2b2419 55%, #4a3b24 100%);
}
.page-hero .bg { position: absolute; inset: 0; opacity: .3; }
.page-hero .bg img { width: 100%; height: 100%; object-fit: cover; filter: blur(1.5px) saturate(.9); transform: scale(1.06); }
.page-hero .bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20, 18, 14, .62), rgba(20, 18, 14, .92)); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero .eyebrow { font-size: 12px; letter-spacing: .4em; color: var(--gold-2); text-transform: uppercase; }
.page-hero h1 { color: #fff; font-family: var(--serif); font-size: 48px; letter-spacing: .1em; margin: 14px 0 14px; }
.page-hero p { color: rgba(255, 255, 255, .6); max-width: 640px; margin: 0; }
.crumbs { display: flex; gap: 10px; font-size: 12.5px; color: rgba(255, 255, 255, .5); margin-top: 22px; letter-spacing: .08em; }
.crumbs a:hover { color: var(--gold-2); }
.crumbs .sep { opacity: .5; }
.crumbs .cur { color: var(--gold-2); }

/* ---------- 产品列表页 ---------- */
.list-layout { display: grid; grid-template-columns: 260px 1fr; gap: 48px; align-items: start; }
.side-nav { border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; position: sticky; top: 110px; }
.side-nav .side-title { padding: 22px 24px; background: var(--bg-dark); color: #fff; font-size: 15px; letter-spacing: .18em; }
.side-nav a { display: flex; justify-content: space-between; align-items: center; padding: 15px 24px; border-top: 1px solid var(--line); font-size: 14.5px; color: var(--ink-2); }
.side-nav a span.count { font-size: 12px; color: var(--gray-2); }
.side-nav a:hover { background: var(--bg-warm); color: var(--gold-deep); }
.side-nav a.active { color: var(--gold-deep); background: var(--bg-warm); box-shadow: inset 3px 0 0 var(--gold); font-weight: 600; }

/* ---------- 产品详情 ---------- */
.pd { display: grid; grid-template-columns: 480px 1fr; gap: 60px; align-items: start; }
.pd-media { position: sticky; top: 110px; border-radius: var(--radius-lg); overflow: hidden; background: var(--bg-warm); box-shadow: var(--shadow); }
.pd-media img { width: 100%; height: auto; }
.pd-info .crumb-line { font-size: 12.5px; color: var(--gray-2); letter-spacing: .1em; margin-bottom: 18px; }
.pd-info h1 { font-family: var(--serif); font-size: 42px; letter-spacing: .06em; }
.pd-info .en { font-size: 12px; letter-spacing: .26em; color: var(--gold); margin-top: 12px; text-transform: uppercase; }
.pd-info .slogan { font-size: 18px; color: var(--ink-2); margin: 22px 0 8px; letter-spacing: .06em; font-family: var(--serif); }
.pd-info .intro { color: var(--gray); }
.pd-spec { display: flex; gap: 40px; margin: 26px 0; padding: 22px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pd-spec .k { font-size: 12px; color: var(--gray-2); letter-spacing: .16em; }
.pd-spec .v { font-size: 17px; color: var(--ink); margin-top: 4px; }
.pd-feats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 30px; }
.pd-feats li { display: flex; align-items: center; gap: 10px; font-size: 14.5px; padding: 12px 16px; background: var(--bg-warm); border-radius: 10px; border: 1px solid var(--line); }
.pd-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.pd-sections { margin-top: 70px; display: grid; gap: 18px; }
.pd-block { border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.pd-block h3 { padding: 20px 28px; font-size: 17px; letter-spacing: .1em; background: var(--bg-warm); border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 12px; }
.pd-block h3::before { content: ""; width: 18px; height: 2px; background: var(--gold); }
.pd-block .inner { padding: 26px 28px; color: var(--gray); }
.pd-block .inner p:last-child { margin-bottom: 0; }
.ing-list { display: flex; flex-wrap: wrap; gap: 10px; }
.ing-list span { padding: 8px 16px; border-radius: 999px; background: #fff; border: 1px solid var(--line); font-size: 14px; color: var(--ink-2); }

/* ---------- 技术列表 ---------- */
.tech-list { display: grid; gap: 18px; }
.tech-row { display: grid; grid-template-columns: 300px 1fr; border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; background: #fff; transition: box-shadow .35s, transform .35s; }
.tech-row:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.tech-row-head { padding: 32px 30px; border-right: 1px solid var(--line); }
.tech-row-head .en { font-size: 11px; letter-spacing: .2em; color: var(--gold); text-transform: uppercase; margin: 16px 0 8px; line-height: 1.6; }
.tech-row-head h3 { font-size: 20px; letter-spacing: .03em; }
.tech-row-body { padding: 32px 36px; display: flex; flex-direction: column; justify-content: center; }
.tech-row-body .sum { color: var(--ink-2); font-size: 15.5px; margin: 0 0 10px; }
.tech-row-body .desc { color: var(--gray); margin: 0; }

/* ---------- 关于 / 品牌 ---------- */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.value-card { padding: 44px 36px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); position: relative; overflow: hidden; }
.value-card .idx { font-family: "Times New Roman", serif; font-size: 64px; color: rgba(185, 150, 90, .16); position: absolute; right: 22px; top: 6px; line-height: 1; }
.value-card h3 { font-size: 21px; margin: 18px 0 10px; }
.value-card p { color: var(--gray); font-size: 14.5px; margin: 0; }

.timeline { position: relative; margin-top: 20px; }
.timeline::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: var(--line); }
.tl-item { display: grid; grid-template-columns: 1fr 80px 1fr; align-items: start; margin-bottom: 44px; }
.tl-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px 28px; box-shadow: var(--shadow-sm); }
.tl-card h3 { font-size: 18px; margin-bottom: 8px; }
.tl-card p { color: var(--gray); font-size: 14px; margin: 0; }
.tl-dot { display: grid; place-items: center; padding-top: 18px; }
.tl-dot i { width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 3px solid var(--gold); box-shadow: 0 0 0 6px rgba(185, 150, 90, .14); }
.tl-item:nth-child(odd) .tl-card { grid-column: 1; }
.tl-item:nth-child(even) .tl-card { grid-column: 3; }

.entity-tabs { display: inline-flex; padding: 5px; border-radius: 999px; background: var(--bg-warm); border: 1px solid var(--line); gap: 4px; margin-bottom: 40px; flex-wrap: wrap; }
.entity-tabs button { border: 0; background: transparent; padding: 10px 26px; border-radius: 999px; font-size: 14px; cursor: pointer; font-family: inherit; color: var(--ink-2); transition: .25s; }
.entity-tabs button.active { background: var(--ink); color: #fff; }
.entity-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.entity-card { padding: 30px 28px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; transition: all .35s; }
.entity-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: rgba(185, 150, 90, .4); }
.entity-card .sub { font-size: 11.5px; letter-spacing: .22em; color: var(--gold); }
.entity-card h3 { font-size: 18px; margin: 10px 0 10px; line-height: 1.5; }
.entity-card p { color: var(--gray); font-size: 14px; margin: 0; }
.entity-card.lab { padding: 0; overflow: hidden; }
.entity-card.lab img { aspect-ratio: 16/10; object-fit: cover; width: 100%; }
.entity-card.lab .pad { padding: 24px 26px; }

/* 实验室 */
.lab-showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.lab-item { position: relative; border-radius: var(--radius-lg); overflow: hidden; min-height: 380px; }
.lab-item img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 1s; }
.lab-item:hover img { transform: scale(1.05); }
.lab-item .cap { position: absolute; inset: auto 0 0 0; padding: 60px 30px 26px; color: #fff; background: linear-gradient(transparent, rgba(16, 14, 10, .82)); }
.lab-item .cap h3 { color: #fff; font-size: 21px; }
.lab-item .cap p { color: rgba(255, 255, 255, .65); font-size: 13.5px; margin: 8px 0 0; }

/* 荣誉 */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.cert-card { padding: 30px 26px; border-radius: var(--radius-lg); background: linear-gradient(160deg, #fff, var(--bg-warm)); border: 1px solid var(--line); text-align: center; }
.cert-card .medal { width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 50%; display: grid; place-items: center; background: linear-gradient(145deg, #f7ecd2, #e8d3a4); color: var(--gold-deep); }
.cert-card h3 { font-size: 17px; margin-bottom: 8px; }
.cert-card p { font-size: 12.5px; color: var(--gray); margin: 0; }

/* ---------- 新闻列表 / 详情 ---------- */
.news-list-page { display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start; }
.news-row { display: grid; grid-template-columns: 300px 1fr; gap: 28px; padding-bottom: 30px; margin-bottom: 30px; border-bottom: 1px dashed var(--line); }
.news-row:last-child { border-bottom: 0; margin-bottom: 0; }
.news-row .cover { border-radius: 12px; overflow: hidden; aspect-ratio: 16/10; background: linear-gradient(135deg, #f3ead9, #e6d6b6); position: relative; }
.news-row .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s; }
.news-row:hover .cover img { transform: scale(1.05); }
.news-row .cover .ph { position: absolute; inset: 0; display: grid; place-items: center; color: rgba(138, 109, 51, .55); font-family: "Times New Roman", serif; letter-spacing: .3em; }
.news-row h3 { font-size: 21px; margin: 10px 0 12px; line-height: 1.5; }
.news-row p { color: var(--gray); font-size: 14.5px; margin: 0 0 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.read-more { font-size: 13.5px; color: var(--gold-deep); letter-spacing: .12em; display: inline-flex; align-items: center; gap: 8px; }
.read-more::after { content: "→"; transition: transform .3s; }
.news-row:hover .read-more::after { transform: translateX(4px); }

.side-box { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; margin-bottom: 24px; }
.side-box h4 { font-size: 16px; letter-spacing: .14em; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.side-box .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.side-box .tag-list a { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); font-size: 13px; }
.side-box .tag-list a:hover, .side-box .tag-list a.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.hot-list li { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.hot-list li:last-child { border-bottom: 0; }
.hot-list li .n { font-family: "Times New Roman", serif; color: var(--gold); font-size: 18px; line-height: 1.4; }
.hot-list li a { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.article { max-width: 860px; margin: 0 auto; }
.article h1 { font-family: var(--serif); font-size: 34px; line-height: 1.5; letter-spacing: .03em; }
.article .meta { display: flex; gap: 18px; align-items: center; color: var(--gray-2); font-size: 13px; margin: 18px 0 30px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.article .content { font-size: 16px; line-height: 2; color: #3b362f; }
.article .content p { margin-bottom: 1.2em; }
.article-nav { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); display: grid; gap: 12px; font-size: 14px; color: var(--gray); }
.article-nav a:hover { color: var(--gold-deep); }

.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 40px; }
.pagination li span, .pagination li a {
    display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px; padding: 0 14px;
    border-radius: 10px; border: 1px solid var(--line); font-size: 14px; color: var(--ink-2);
}
.pagination li.active span { background: var(--ink); color: #fff; border-color: var(--ink); }
.pagination li.disabled span { opacity: .4; }
.pagination li a:hover { border-color: var(--gold); color: var(--gold-deep); }

/* ---------- 图文介绍块 ---------- */
.feature-split { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.feature-split.reverse .txt { order: 2; }
.feature-split .img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.feature-split .img img { width: 100%; aspect-ratio: 4/3.3; object-fit: cover; }
.marquee-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.marquee-tags span { padding: 7px 16px; border-radius: 8px; background: var(--bg-warm); border: 1px solid var(--line); font-size: 13.5px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 50px; align-items: start; }
.contact-info { display: grid; gap: 14px; }
.contact-item { display: flex; gap: 18px; padding: 22px 24px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); }
.contact-item .ico { width: 46px; height: 46px; flex-shrink: 0; border-radius: 12px; display: grid; place-items: center; background: linear-gradient(145deg, #faf4e6, #f1e4c6); color: var(--gold-deep); }
.contact-item .k { font-size: 12px; letter-spacing: .18em; color: var(--gray-2); }
.contact-item .v { font-size: 15.5px; color: var(--ink); margin-top: 2px; word-break: break-all; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-sm); }
.form-card h3 { font-size: 22px; margin-bottom: 8px; }
.form-card .tip { color: var(--gray); font-size: 13.5px; margin-bottom: 26px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12.5px; letter-spacing: .1em; color: var(--gray); }
.field label b { color: #c0392b; font-weight: 400; }
.input, .textarea, select.input {
    height: 46px; padding: 0 15px; border-radius: 10px; border: 1px solid var(--line); background: #fff;
    font-family: inherit; font-size: 14.5px; color: var(--ink); transition: border-color .25s, box-shadow .25s; width: 100%;
}
.textarea { height: auto; padding: 12px 15px; min-height: 130px; resize: vertical; line-height: 1.7; }
.input:focus, .textarea:focus { outline: 0; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(185, 150, 90, .15); }
.form-alert { padding: 12px 16px; border-radius: 10px; font-size: 14px; margin-bottom: 18px; }
.form-alert.ok { background: #eef8f0; color: #2e7d4f; border: 1px solid #cdebd7; }
.form-alert.err { background: #fdf0ee; color: #b3402c; border: 1px solid #f4d5cf; }
.form-alert ul { margin: 0; padding-left: 18px; }

.map-card { margin-top: 50px; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line); background: var(--bg-warm); padding: 36px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.map-card .addr h4 { font-size: 14px; letter-spacing: .12em; color: var(--gold-deep); margin-bottom: 6px; }
.map-card .addr p { font-size: 14px; color: var(--gray); margin: 0; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-dark); color: rgba(255, 255, 255, .55); padding: 70px 0 0; font-size: 13.5px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 50px; padding-bottom: 50px; }
.footer h4 { color: #fff; font-size: 15px; letter-spacing: .16em; margin-bottom: 20px; }
.footer .brand-desc { margin-top: 20px; max-width: 320px; line-height: 1.9; }
.footer .logo .logo-en { color: #fff; }
.footer .logo .logo-cn { color: rgba(255, 255, 255, .5); }
.footer ul li { margin-bottom: 10px; }
.footer a:hover { color: var(--gold-2); }
.footer .contact-line { display: flex; gap: 10px; margin-bottom: 12px; line-height: 1.7; }
.footer .contact-line svg { flex-shrink: 0; margin-top: 4px; color: var(--gold-2); }
.footer .big-phone { font-family: "Times New Roman", serif; font-size: 28px; color: #fff; letter-spacing: .04em; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 22px 0; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; font-size: 12.5px; }

/* 回到顶部 */
.to-top {
    position: fixed; right: 26px; bottom: 26px; width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center;
    background: rgba(20, 18, 14, .82); color: var(--gold-2); cursor: pointer; border: 1px solid rgba(216, 185, 121, .3);
    opacity: 0; visibility: hidden; transition: .3s; z-index: 90;
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--gold); color: #fff; }

/* 浮动联系条 */
.float-contact { position: fixed; right: 0; top: 50%; transform: translateY(-50%); z-index: 95; display: flex; flex-direction: column; gap: 1px; }
.float-contact a {
    width: 54px; padding: 12px 0; background: rgba(20, 18, 14, .86); color: #fff; display: grid; place-items: center; gap: 5px;
    font-size: 11px; letter-spacing: .05em; backdrop-filter: blur(6px); transition: .3s;
}
.float-contact a:first-child { border-radius: 10px 0 0 0; }
.float-contact a:last-child { border-radius: 0 0 0 10px; }
.float-contact a:hover { background: var(--gold); color: #fff; width: 62px; }

/* ---------- 动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.2, .6, .2, 1), transform .8s cubic-bezier(.2, .6, .2, 1); }
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .1s; } .reveal-d2 { transition-delay: .2s; } .reveal-d3 { transition-delay: .3s; } .reveal-d4 { transition-delay: .4s; }

/* 无 JS / 减少动态效果 / 截图环境：直接显示 */
.no-js .reveal, html.no-anim .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
    .hero-media img, .product-card:hover .product-media img, .about-media:hover .main-img img { transform: none !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
    .nav > li > a { padding: 10px 12px; font-size: 14.5px; }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-top { grid-template-columns: 1fr 1fr; }
    .pd { grid-template-columns: 400px 1fr; gap: 40px; }
}
@media (max-width: 992px) {
    .topbar { display: none; }
    .header .container { height: 70px; }
    .menu-toggle { display: inline-flex; margin-left: auto; }
    .nav {
        position: fixed; inset: 70px 0 auto 0; background: #fff; flex-direction: column; align-items: stretch;
        padding: 16px 24px 30px; gap: 0; border-bottom: 1px solid var(--line); max-height: calc(100vh - 70px); overflow: auto;
        transform: translateY(-12px); opacity: 0; visibility: hidden; transition: .3s; box-shadow: var(--shadow);
    }
    .nav.open { transform: none; opacity: 1; visibility: visible; }
    .nav > li { border-bottom: 1px solid var(--line); }
    .nav > li > a { padding: 14px 4px; }
    .nav > li > a::after { display: none; }
    .dropdown { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; border: 0; padding: 0 0 10px; display: flex; flex-wrap: wrap; gap: 6px; }
    .dropdown a { padding: 6px 12px; background: var(--bg-warm); border-radius: 999px; font-size: 13px; }
    .dropdown .dd-title { display: none; }
    .header-cta { display: none; }
    .section { padding: 72px 0; }
    .sec-title { font-size: 30px; }
    .hero-title { font-size: 42px; }
    .hero-stats { gap: 28px; flex-wrap: wrap; }
    .about-grid, .contact-grid, .feature-split, .dark-split, .pd, .list-layout, .news-list-page, .lab-showcase, .news-grid, .value-grid, .entity-grid { grid-template-columns: 1fr; }
    .about-media .badge { right: 10px; bottom: -20px; }
    .pd-media { position: static; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .timeline::before { left: 8px; }
    .tl-item { grid-template-columns: 1fr; padding-left: 34px; }
    .tl-item .tl-dot { position: absolute; left: 0; }
    .tl-item:nth-child(odd) .tl-card, .tl-item:nth-child(even) .tl-card { grid-column: 1; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .stat:nth-child(2) { border-right: 0; }
    .map-card { grid-template-columns: 1fr; }
    .side-nav { position: static; }
    .float-contact { display: none; }
    .tech-row { grid-template-columns: 1fr; }
    .tech-row-head { border-right: 0; border-bottom: 1px solid var(--line); }
    .news-row { grid-template-columns: 1fr; }
    .form-card { padding: 26px; }
    .sec-head.flex { align-items: flex-start; }
}
@media (max-width: 640px) {
    .container { width: calc(100% - 32px); }
    .product-grid { grid-template-columns: 1fr; }
    .tech-grid, .cert-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 34px; }
    .hero-content { padding: 56px 0 80px; }
    .hero-stats .num { font-size: 30px; }
    .sec-title { font-size: 25px; }
    .page-hero h1 { font-size: 32px; }
    .pd-info h1 { font-size: 30px; }
    .pd-feats, .form-grid, .about-points { grid-template-columns: 1fr; }
    .footer-top { grid-template-columns: 1fr; gap: 30px; }
    .article h1 { font-size: 24px; }
    .period-btns { overflow-x: auto; }
}