/* =============================================================
   北京极境赛斯科技有限公司 - Genosynth
   主色：#DC2D1E  风格：简约大气
   ============================================================= */

:root {
    --red: #DC2D1E;
    --red-dark: #B8231A;
    --red-soft: #FBE9E7;
    --red-glow: rgba(220, 45, 30, 0.18);
    --ink-900: #161617;
    --ink-800: #25262a;
    --ink-700: #3a3b40;
    --ink-500: #6b6d75;
    --ink-400: #8e9098;
    --ink-300: #b9bbc1;
    --ink-200: #d8d9de;
    --ink-100: #ebecf0;
    --ink-50:  #f5f6f8;
    --bg:     #ffffff;
    --bg-alt: #fafafa;
    --bg-dark:#160a09;
    --shadow-sm: 0 1px 2px rgba(20,10,10,.04), 0 1px 1px rgba(20,10,10,.03);
    --shadow:    0 6px 20px rgba(20,10,10,.06), 0 2px 6px rgba(20,10,10,.04);
    --shadow-lg: 0 18px 48px rgba(20,10,10,.10), 0 4px 12px rgba(20,10,10,.05);
    --radius:   8px;
    --radius-lg:14px;
    --maxw: 1240px;
    --header-h: 72px;
    --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
    color: var(--ink-800);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--red); }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
input, select, textarea { font: inherit; color: inherit; }
ul, ol { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4 { font-weight: 600; color: var(--ink-900); margin: 0; line-height: 1.25; letter-spacing: -0.01em; }

/* ---- Layout ---- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
.section { padding: 80px 0; }
.section-tight { padding: 56px 0; }
.section-dark { background: var(--bg-dark); color: #f0f0f0; }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }

/* ---- Header / Nav ---- */
.site-header {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: rgba(255,255,255,.92);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--ink-100);
    z-index: 100;
    transition: background .25s var(--ease);
}
.site-header.on-cover { background: transparent; border-bottom-color: transparent; }
.site-header.on-cover .brand, .site-header.on-cover .nav a { color: #fff; }
.site-header.on-cover .brand .brand-mark { background: #fff; color: var(--red); }
.site-header.on-cover .nav a.active::after { background: #fff; }

.nav-inner {
    max-width: var(--maxw);
    height: 100%;
    margin: 0 auto;
    padding: 0 28px;
    position: relative;
    display: flex; align-items: center; justify-content: center;
}
.brand { display: flex; flex-direction: column; align-items: center; gap: 5px; font-weight: 700; color: var(--ink-900); text-decoration: none; }
.nav-inner .brand { position: absolute; left: 28px; top: 50%; transform: translateY(-50%); align-items: center; }
.brand-logo {
    height: 32px;
    width: auto;
    display: block;
    background: transparent;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    transition: transform .2s ease, opacity .2s ease;
}
.brand-zh {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .14em;
    line-height: 1.1;
    color: inherit;
}
.brand:hover .brand-logo { transform: translateY(-1px); opacity: .9; }
.brand-mark {
    width: 38px; height: 38px;
    background: var(--red);
    color: #fff;
    display: grid; place-items: center;
    font-size: 20px; font-weight: 800;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--red-glow);
    font-family: "Times New Roman", Georgia, serif;
    letter-spacing: -1px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text .zh { font-size: 16px; font-weight: 700; }
.brand-text .en { font-size: 11px; color: var(--ink-400); letter-spacing: .12em; }
.nav { flex: 1 1 auto; display: flex; align-items: center; justify-content: center; gap: 54px; margin: 0; }
.nav a {
    position: relative; font-size: 15px; font-weight: 500;
    color: var(--ink-800); padding: 6px 0;
}
.nav a::after {
    content: ""; position: absolute; left: 50%; bottom: -4px;
    width: 0; height: 2px; background: var(--red);
    transition: width .25s var(--ease), left .25s var(--ease);
}
.nav a:hover::after, .nav a.active::after { width: 100%; left: 0; }
/* 产品服务下拉菜单 */
.nav .nav-item { position: relative; display: flex; }
.nav .nav-item > a { display: block; }
.nav .dropdown {
    position: absolute; top: calc(100% + 14px); left: 50%;
    transform: translateX(-50%) translateY(6px);
    min-width: 210px;
    background: #fff;
    border: 1px solid var(--ink-100);
    border-radius: 12px;
    box-shadow: 0 18px 48px rgba(20,10,10,.12), 0 4px 12px rgba(20,10,10,.06);
    padding: 8px;
    opacity: 0; visibility: hidden; pointer-events: none;
    transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
    z-index: 300;
}
.nav .dropdown::before {
    content: ""; position: absolute; top: -14px; left: 0; right: 0; height: 14px;
}
.nav .dropdown a {
    display: block; padding: 10px 14px; border-radius: 8px;
    font-size: 14px; font-weight: 500; color: var(--ink-800);
    white-space: nowrap;
}
.nav .dropdown a::after { display: none; }
.nav .dropdown a:hover { background: var(--red-soft); color: var(--red); }
.nav-item:hover .dropdown { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0); }
/* cover 状态下：主链接白字，下拉面板保持白底深字 */
.site-header.on-cover .nav .dropdown a { color: var(--ink-800); }
.site-header.on-cover .nav .dropdown a:hover { color: var(--red); }
.nav-cta {
    position: absolute; right: 28px; top: 50%; transform: translateY(-50%);
    display: inline-flex; align-items: center; gap: 6px;
    padding: 12px 30px; border-radius: 999px;
    background: var(--red); color: #fff !important;
    font-size: 15px; font-weight: 600; line-height: 1.2;
    white-space: nowrap;
    border: 1px solid rgba(255,255,255,.25);
    box-shadow: 0 0 0 5px rgba(220,45,30,.14);
    transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 0 0 7px rgba(220,45,30,.20), 0 10px 24px var(--red-glow); color: #fff !important; }
.nav-cta::after { display: none !important; }
.menu-btn { display: none; }

/* ---- Footer ---- */
.site-footer {
    background: #0e0606; color: #c2c2c5; padding: 60px 0 28px;
}
/* 顶部：logo + 横向导航 平齐 */
.footer-top {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 18px;
    padding-bottom: 28px; margin-bottom: 56px;
    border-bottom: 1px solid #2a1a18;
}
.footer-top .brand { flex-direction: row; align-items: center; gap: 10px; }
.footer-top .brand-logo { height: 34px; }
.footer-top .brand-zh { color: #fff; margin-top: 0; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 34px; }
.footer-nav a {
    color: #c2c2c5; font-size: 15px; text-decoration: none;
    position: relative; padding: 4px 0; transition: color .2s;
}
.footer-nav a::after {
    content: ""; position: absolute; left: 0; bottom: -2px;
    width: 0; height: 2px; background: var(--red); transition: width .25s;
}
.footer-nav a:hover { color: #fff; }
.footer-nav a:hover::after { width: 100%; }

/* 下方：简介 + 联系方式 + 总部，模块间距拉大 */
.footer-cols {
    display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 72px;
    margin-bottom: 48px;
}
.footer-blurb p { color: #9b9ba0; font-size: 14px; margin: 0; line-height: 1.8; max-width: 420px; }
.footer h4 { color: #fff; font-size: 14px; margin-bottom: 16px; letter-spacing: .04em; }
.footer-col ul li { margin-bottom: 10px; font-size: 13.5px; color: #fff; }
.footer-col ul li a:hover { color: #fff; }
.foot-contact a { color: #fff; }
.footer-col.col-4 ul li:first-child { white-space: nowrap; }
.foot-bottom {
    border-top: 1px solid #2a1a18; padding-top: 22px;
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
    font-size: 12.5px; color: #7c7c81;
}
.foot-bottom a { color: #9b9ba0; }
.foot-bottom a:hover { color: #fff; }
.foot-icp { display: inline-flex; align-items: center; gap: 6px; }
.foot-icp .foot-beian { display: inline-flex; align-items: center; gap: 5px; color: #9b9ba0; }
.foot-icp .foot-beian:hover { color: #fff; }
.foot-icp .beian-icon { width: 15px; height: 16px; display: inline-block; object-fit: contain; }
.foot-brand-logo { height: 45px; width: auto; display: inline-block; vertical-align: middle; }
.foot-bottom > div:first-child { display: flex; align-items: center; gap: 10px; }

/* =============================================================
   INDEX - COVER
   ============================================================= */
.cover {
    position: relative;
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
    cursor: pointer;
    color: #fff;
    background: #14080a;
}
.cover-bg {
    position: absolute; inset: 0;
    background-image: url('../img/cover.jpg?v=20260829115844');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #14080a;
    transform: scale(1.06);
    animation: coverKenburns 22s ease-in-out infinite alternate;
}
@keyframes coverKenburns {
    from { transform: scale(1.06) translate(0, 0); }
    to   { transform: scale(1.14) translate(-1.4%, -1.6%); }
}
.cover-bg::after {
    content: ""; position: absolute; inset: 0;
    background:
        radial-gradient(ellipse at 80% 16%, rgba(12,5,6,.60) 0%, rgba(12,5,6,0) 42%),
        radial-gradient(ellipse 60% 50% at 50% 45%, rgba(12,5,6,.32) 0%, rgba(12,5,6,0) 70%),
        linear-gradient(180deg, rgba(12,5,6,.32) 0%, rgba(12,5,6,.14) 42%, rgba(12,5,6,.42) 100%),
        linear-gradient(95deg, rgba(12,5,6,.38) 0%, rgba(12,5,6,.08) 52%, rgba(12,5,6,.28) 100%),
        radial-gradient(ellipse at 16% 86%, rgba(220,45,30,.14) 0%, rgba(220,45,30,0) 50%);
}
.cover-content { animation: coverFadeUp .9s var(--ease) both; }
@keyframes coverFadeUp {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
}
.cover-content {
    position: relative; z-index: 2;
    width: min(820px, 92vw);
    text-align: center;
    padding: 120px 20px 100px;
}
.cover-head {
    display: flex; flex-direction: column; align-items: center;
    margin-bottom: 30px;
}
.cover-kicker {
    display: inline-flex; align-items: center;
    font-size: 44px; font-weight: 700; letter-spacing: .1em;
    color: #fff;
    text-shadow: 0 1px 8px rgba(0,0,0,.5);
    text-transform: uppercase;
    white-space: nowrap;
}
.cover-kicker .red { color: var(--red); }
.cover-title {
    font-size: clamp(52px, 7vw, 88px);
    font-weight: 800;
    color: var(--red);
    text-shadow: 0 2px 24px rgba(0,0,0,.55);
    line-height: 1.1;
    letter-spacing: .08em;
    margin: 0 0 10px;
}
.cover-title .red { color: var(--red); }

/* search box */
.search-wrap { position: relative; max-width: 680px; margin: 0 auto; cursor: default; }
.search-box {
    display: flex; align-items: center;
    height: 64px;
    background: #fff;
    border-radius: 999px;
    box-shadow: 0 24px 60px rgba(0,0,0,.35), 0 4px 12px rgba(220,45,30,.18);
    overflow: hidden;
    transition: box-shadow .25s var(--ease), transform .25s var(--ease);
}
.search-box:focus-within { box-shadow: 0 28px 72px rgba(0,0,0,.42), 0 6px 18px rgba(220,45,30,.32); transform: translateY(-1px); }
.search-icon {
    flex: 0 0 64px;
    display: grid; place-items: center;
    color: var(--ink-500);
}
.search-input {
    flex: 1; height: 100%;
    border: 0; outline: 0;
    background: transparent;
    font-size: 16px; padding: 0 8px;
    color: var(--ink-900);
}
.search-input::placeholder { color: var(--ink-400); }
.search-btn {
    flex: 0 0 auto;
    height: 48px; margin-right: 8px;
    padding: 0 26px;
    background: var(--red); color: #fff;
    border-radius: 999px;
    font-weight: 600; font-size: 15px;
    display: inline-flex; align-items: center; gap: 6px;
    transition: background .2s var(--ease);
}
.search-btn:hover { background: var(--red-dark); }

.search-tip {
    margin-top: 18px;
    color: rgba(255,255,255,.5);
    font-size: 13px;
    display: flex; justify-content: center; align-items: center; gap: 8px;
}
.search-tip kbd {
    display: inline-block; padding: 2px 6px;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 4px; font-size: 11px;
    font-family: ui-monospace, "SF Mono", Consolas, monospace;
}

/* hot dropdown */
.hot-panel {
    position: absolute; left: 0; right: 0; top: calc(100% + 10px);
    background: #fff;
    color: var(--ink-800);
    border-radius: 16px;
    box-shadow: 0 24px 60px rgba(0,0,0,.32);
    overflow: hidden;
    opacity: 0; transform: translateY(-6px); pointer-events: none;
    transition: opacity .18s var(--ease), transform .18s var(--ease);
    text-align: left;
    max-height: 480px;
    display: flex; flex-direction: column;
}
.hot-panel.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.hot-head {
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid var(--ink-100);
    font-size: 13px; color: var(--ink-500);
    flex: 0 0 auto;
}
.hot-head strong { color: var(--ink-900); font-weight: 600; }
.hot-head .badge {
    background: var(--red-soft); color: var(--red);
    padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 600;
    margin-left: 6px;
}
.hot-list { overflow-y: auto; flex: 1 1 auto; }
.hot-list::-webkit-scrollbar { width: 6px; }
.hot-list::-webkit-scrollbar-thumb { background: var(--ink-200); border-radius: 3px; }
.hot-item {
    display: flex; align-items: center; gap: 14px;
    padding: 11px 20px;
    cursor: pointer;
    transition: background .15s;
    border-bottom: 1px solid var(--ink-50);
}
.hot-item:last-child { border-bottom: 0; }
.hot-item:hover { background: var(--ink-50); }
.hot-rank {
    flex: 0 0 24px; height: 24px;
    display: grid; place-items: center;
    background: var(--ink-100); color: var(--ink-500);
    font-size: 12px; font-weight: 700;
    border-radius: 6px;
    font-family: "SF Pro Display", system-ui;
}
.hot-item.top .hot-rank { background: var(--red); color: #fff; }
.hot-name { flex: 1; font-size: 14px; color: var(--ink-800); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hot-code { font-size: 12px; color: var(--ink-400); font-family: ui-monospace, "SF Mono", Consolas, monospace; }
.hot-tag {
    flex: 0 0 auto; font-size: 11px; padding: 2px 8px; border-radius: 999px;
    background: var(--red-soft); color: var(--red); font-weight: 600;
}
.hot-empty { padding: 30px 20px; text-align: center; color: var(--ink-400); font-size: 13px; }

.cover-hint {
    position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
    z-index: 2;
    color: rgba(255,255,255,.55);
    font-size: 12.5px; letter-spacing: .12em;
    display: inline-flex; align-items: center; gap: 10px;
    pointer-events: none;
}
.cover-hint .arrow {
    width: 24px; height: 1px; background: rgba(255,255,255,.4); position: relative;
}
.cover-hint .arrow::after {
    content: ""; position: absolute; right: 0; top: 50%;
    width: 6px; height: 6px; border-top: 1px solid rgba(255,255,255,.6);
    border-right: 1px solid rgba(255,255,255,.6);
    transform: translateY(-50%) rotate(135deg);
}
.cover-hint b { color: #fff; font-weight: 500; }

/* =============================================================
   INDEX - BANNER CAROUSEL
   ============================================================= */
.hero {
    position: relative;
    overflow: hidden;
    background: #0d0606;
}
.hero-track {
    position: relative;
    width: 100%;
    height: auto;
    /* 容器高度跟随宽度（3:1），与滚动页图片比例一致 */
    aspect-ratio: 3 / 1;
}
.hero-slide {
    position: absolute; inset: 0;
    /* contain：图片等比完整显示、不裁切；比例不一致时居中留白（深色背景填充） */
    background-size: contain; background-position: center;
    opacity: 0; transition: opacity .9s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide::before {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,.25) 0%, rgba(0,0,0,0) 30%, rgba(0,0,0,0) 70%, rgba(0,0,0,.35) 100%);
}
/* 带文字的幻灯片：左侧加暗渐变保证白字可读 */
.hero-slide--text::before {
    background: linear-gradient(90deg, rgba(0,0,0,.72) 0%, rgba(0,0,0,.42) 38%, rgba(0,0,0,0) 70%);
}
.hero-caption {
    position: absolute;
    left: clamp(24px, 7vw, 110px);
    top: 50%;
    transform: translateY(-50%);
    max-width: 560px;
    color: #fff;
    z-index: 3;
    animation: heroFadeUp .9s ease both;
}
@keyframes heroFadeUp {
    from { opacity: 0; transform: translateY(-42%); }
    to   { opacity: 1; transform: translateY(-50%); }
}
.hero-tag {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 2px;
    padding: 6px 14px;
    border: 1px solid rgba(255,255,255,.55);
    border-radius: 999px;
    color: rgba(255,255,255,.92);
    margin-bottom: 18px;
}
.hero-title {
    font-size: clamp(26px, 4vw, 46px);
    line-height: 1.18;
    font-weight: 800;
    margin: 0 0 16px;
    color: #fff;
    text-shadow: 0 2px 16px rgba(0,0,0,.45);
}
.hero-sub {
    font-size: clamp(14px, 1.5vw, 17px);
    line-height: 1.7;
    color: rgba(255,255,255,.88);
    margin: 0;
    text-shadow: 0 1px 10px rgba(0,0,0,.4);
}
@media (max-width: 768px) {
    .hero-slide--text::before {
        background: linear-gradient(180deg, rgba(0,0,0,.15) 0%, rgba(0,0,0,.55) 55%, rgba(0,0,0,.7) 100%);
    }
    .hero-caption {
        left: 0; right: 0;
        top: auto; bottom: 64px;
        transform: none;
        padding: 0 22px;
        max-width: 100%;
        text-align: left;
    }
    @keyframes heroFadeUp {
        from { opacity: 0; transform: translateY(16px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    .focus-inner { grid-template-columns: 1fr; gap: 36px; }
    .focus-band { padding: 60px 0; }
    .focus-visual { order: -1; min-height: 320px; }
    .focus-lead { max-width: 100%; }
}
.hero-arrow {
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 52px; height: 52px;
    background: rgba(255,255,255,.92);
    border-radius: 50%;
    display: grid; place-items: center;
    color: var(--ink-800); cursor: pointer;
    box-shadow: 0 4px 18px rgba(0,0,0,.2);
    transition: background .2s, transform .2s;
    z-index: 4;
}
.hero-arrow:hover { background: #fff; transform: translateY(-50%) scale(1.06); }
.hero-arrow.prev { left: 36px; }
.hero-arrow.next { right: 36px; }
.hero-arrow svg { width: 22px; height: 22px; }
.hero-dots {
    position: absolute; left: 50%; bottom: 28px;
    transform: translateX(-50%);
    display: flex; gap: 10px; z-index: 4;
}
.hero-dot {
    width: 28px; height: 4px; border-radius: 2px;
    background: rgba(255,255,255,.4);
    transition: background .2s, width .3s;
    cursor: pointer;
}
.hero-dot.active { background: var(--red); width: 44px; }

/* =============================================================
   SECTIONS
   ============================================================= */
.section-head { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
    display: inline-block; color: var(--red);
    font-size: 13px; font-weight: 600;
    letter-spacing: .26em; text-transform: uppercase;
    margin-bottom: 16px;
    position: relative; padding: 0 32px;
}
.section-eyebrow::before, .section-eyebrow::after {
    content: ""; position: absolute; top: 50%;
    width: 22px; height: 1px; background: var(--red);
}
.section-eyebrow::before { left: 0; }
.section-eyebrow::after  { right: 0; }
.section-title {
    font-size: clamp(28px, 3.2vw, 40px);
    font-weight: 700; color: var(--ink-900);
    margin: 0 0 14px;
    letter-spacing: -0.01em;
}
.section-sub { color: var(--ink-500); max-width: 660px; margin: 0 auto; font-size: 15px; }

/* pillars (理念) */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pillar {
    background: #fff; border: 1px solid var(--ink-100);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.pillar:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--red-soft); }
.pillar-ico {
    width: 52px; height: 52px; border-radius: 12px;
    display: grid; place-items: center;
    background: var(--red-soft); color: var(--red);
    margin-bottom: 20px;
}
.pillar-ico svg { width: 26px; height: 26px; }
.pillar h3 { font-size: 19px; margin-bottom: 10px; }
.pillar p { color: var(--ink-500); font-size: 14px; margin: 0; line-height: 1.75; }

/* categories overview */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cat-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--ink-100);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    display: flex; flex-direction: column; gap: 6px;
    transition: all .25s var(--ease);
    cursor: pointer;
    text-decoration: none; color: var(--ink-800);
}
.cat-card:hover { border-color: var(--red); transform: translateY(-3px); box-shadow: var(--shadow); color: var(--ink-800); }
.cat-card .cat-name { font-size: 17px; font-weight: 600; }
.cat-card .cat-count { color: var(--ink-400); font-size: 13px; }
.cat-card .cat-arrow {
    position: absolute; right: 18px; top: 28px;
    width: 32px; height: 32px; border-radius: 50%;
    display: grid; place-items: center;
    background: var(--ink-50); color: var(--ink-500);
    transition: all .25s var(--ease);
}
.cat-card:hover .cat-arrow { background: var(--red); color: #fff; transform: rotate(-45deg); }
.cat-card .cat-arrow svg { width: 14px; height: 14px; }

/* =============================================================
   FOCUS BAND · 分子与细胞 + 3D DNA 双螺旋
   ============================================================= */
.focus-band {
    position: relative;
    padding: 86px 0;
    overflow: hidden;
    background:
        radial-gradient(1200px 600px at 85% 20%, rgba(220,45,30,.10), transparent 60%),
        radial-gradient(900px 500px at 10% 90%, rgba(64,132,255,.10), transparent 60%),
        linear-gradient(180deg, #0a0c14 0%, #0d1018 100%);
    color: #eef1f6;
}
.focus-band::after {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(circle at 70% 50%, #000 0%, transparent 72%);
    -webkit-mask-image: radial-gradient(circle at 70% 50%, #000 0%, transparent 72%);
}
.focus-inner {
    position: relative; z-index: 2;
    display: grid; grid-template-columns: 1.05fr .95fr; gap: 50px; align-items: center;
}
.focus-text .section-eyebrow { color: rgba(255,255,255,.55); }
.focus-text .section-title { color: #fff; margin-bottom: 16px; }
.focus-lead {
    color: rgba(238,241,246,.78); font-size: 16px; line-height: 1.8;
    max-width: 520px; margin: 0 0 26px;
}
.focus-points { list-style: none; margin: 0 0 30px; padding: 0; display: grid; gap: 18px; }
.focus-points li { display: flex; gap: 14px; align-items: flex-start; }
.fp-dot {
    flex: none; width: 11px; height: 11px; margin-top: 6px; border-radius: 50%;
    background: var(--red); box-shadow: 0 0 0 4px rgba(220,45,30,.18), 0 0 14px rgba(220,45,30,.7);
}
.focus-points strong { display: block; color: #fff; font-size: 16px; margin-bottom: 2px; }
.focus-points span { color: rgba(238,241,246,.66); font-size: 14px; line-height: 1.6; }
.focus-btn {
    display: inline-flex; align-items: center; gap: 9px;
    padding: 13px 24px; border-radius: 999px;
    background: var(--red); color: #fff; font-weight: 600; font-size: 15px;
    text-decoration: none; transition: transform .2s, box-shadow .2s;
    box-shadow: 0 8px 24px rgba(220,45,30,.35);
}
.focus-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(220,45,30,.5); }
.focus-btn svg { transition: transform .2s; }
.focus-btn:hover svg { transform: translateX(4px); }

/* ---- 3D DNA 双螺旋 ---- */
.focus-visual { display: grid; place-items: center; min-height: 420px; }
.dna {
    position: relative;
    width: 240px; height: 420px;
    perspective: 900px;
}
.dna-glow {
    position: absolute; inset: -30% -10%;
    background: radial-gradient(closest-side, rgba(64,132,255,.22), transparent 70%);
    filter: blur(10px); pointer-events: none; z-index: 0;
}
.dna-helix {
    position: absolute; inset: 0; z-index: 1;
    transform-style: preserve-3d;
    animation: dnaRotate 9s linear infinite;
}
@keyframes dnaRotate { from { transform: rotateY(0deg); } to { transform: rotateY(360deg); } }
.dna-rung {
    position: absolute; left: 50%; top: 50%;
    width: 150px; height: 14px; margin: -7px 0 0 -75px;
    transform: rotateY(calc(var(--i) * 30deg)) translateZ(90px);
    transform-style: preserve-3d;
}
/* 让 12 个 rung 沿竖轴均匀分布 */
.dna-rung:nth-child(1)  { top: 8%; }
.dna-rung:nth-child(2)  { top: 16%; }
.dna-rung:nth-child(3)  { top: 24%; }
.dna-rung:nth-child(4)  { top: 32%; }
.dna-rung:nth-child(5)  { top: 40%; }
.dna-rung:nth-child(6)  { top: 48%; }
.dna-rung:nth-child(7)  { top: 56%; }
.dna-rung:nth-child(8)  { top: 64%; }
.dna-rung:nth-child(9)  { top: 72%; }
.dna-rung:nth-child(10) { top: 80%; }
.dna-rung:nth-child(11) { top: 88%; }
.dna-rung:nth-child(12) { top: 96%; }
.dna-rung .rung {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%);
    width: 96px; height: 3px; border-radius: 2px;
    background: linear-gradient(90deg, rgba(64,132,255,.9), rgba(120,200,255,.5), rgba(220,45,30,.9));
    box-shadow: 0 0 8px rgba(120,200,255,.6);
}
.dna-rung .nuc {
    position: absolute; top: 50%; width: 15px; height: 15px; border-radius: 50%;
    transform: translateY(-50%);
    box-shadow: 0 0 12px currentColor;
}
.dna-rung .nuc.a { left: 0;  background: #ff5a4d; color: #ff5a4d; }   /* A 红 */
.dna-rung .nuc.t { right: 0; background: #ffcf3f; color: #ffcf3f; }  /* T 黄 */
.dna-rung .nuc.g { left: 0;  background: #4dd0ff; color: #4dd0ff; }  /* G 蓝 */
.dna-rung .nuc.c { right: 0; background: #7CFF9B; color: #7CFF9B; }  /* C 绿 */
@media (prefers-reduced-motion: reduce) { .dna-helix { animation: none; } }

/* CTA */
.cta-block {
    background: linear-gradient(135deg, #1a0808 0%, #2a0d0c 50%, #1a0808 100%);
    border-radius: var(--radius-lg);
    padding: 56px;
    display: flex; justify-content: space-between; align-items: center; gap: 30px;
    color: #fff;
    position: relative; overflow: hidden;
}
.cta-block::before {
    content: ""; position: absolute; right: -80px; top: -80px;
    width: 320px; height: 320px; border-radius: 50%;
    background: radial-gradient(circle, rgba(220,45,30,.4) 0%, rgba(220,45,30,0) 70%);
}
.cta-block h3 { color: #fff; font-size: 28px; margin-bottom: 8px; }
.cta-block p { color: rgba(255,255,255,.7); margin: 0; }
.cta-btn {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--red); color: #fff;
    padding: 14px 28px; border-radius: 999px;
    font-weight: 600; flex: 0 0 auto;
    transition: background .2s, transform .2s;
}
.cta-btn:hover { background: var(--red-dark); color: #fff; transform: translateX(2px); }

/* =============================================================
   ABOUT
   ============================================================= */
.page-hero {
    padding: 140px 0 60px;
    background: linear-gradient(180deg, #1a0808 0%, #160808 100%);
    color: #fff;
    text-align: center;
    position: relative; overflow: hidden;
}
.page-hero::after {
    content: ""; position: absolute; inset: 0;
    background: radial-gradient(ellipse at center top, rgba(220,45,30,.25) 0%, transparent 60%);
    pointer-events: none;
}
.page-hero .crumbs { color: rgba(255,255,255,.55); font-size: 13px; margin-bottom: 18px; }
.page-hero .crumbs a { color: rgba(255,255,255,.7); }
.page-hero h1 { color: #fff; font-size: clamp(32px, 4vw, 48px); margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,.7); max-width: 640px; margin: 0 auto; }

.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; }
.about-text p { color: var(--ink-700); margin: 0 0 14px; font-size: 15px; line-height: 1.85; }
.about-text p strong { color: var(--red); }
.brand-logo-inline { height: 22px; vertical-align: -4px; margin: 0 1px; display: inline-block; }

.about-photo {
    margin-bottom: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--ink-100);
    box-shadow: var(--shadow-sm);
    height: 100%;
    min-height: 100%;
}
.about-photo img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    background: #f5f5f5;
}

.fact-card {
    background: #fff; border: 1px solid var(--ink-100);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
}
.fact-card h3 { color: var(--red); font-size: 14px; letter-spacing: .2em; text-transform: uppercase; margin-bottom: 22px; }
.fact-list { display: grid; gap: 0; }
.fact-row {
    display: grid; grid-template-columns: 110px 1fr;
    gap: 12px; padding: 14px 0;
    border-bottom: 1px dashed var(--ink-100);
    font-size: 14px;
}
.fact-row:last-child { border-bottom: 0; }
.fact-row .k { color: var(--ink-500); }
.fact-row .v { color: var(--ink-900); word-break: break-all; }
.fact-row .v a { color: var(--red); }

.scope-list {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 12px 24px;
    margin-top: 20px;
    font-size: 14px; color: var(--ink-700);
    line-height: 1.85;
}
.scope-list li {
    padding-left: 16px; position: relative;
}
.scope-list li::before {
    content: ""; position: absolute; left: 0; top: 11px;
    width: 6px; height: 6px; background: var(--red); border-radius: 1px;
}

.stats-row {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 18px; margin-top: 30px; max-width: 560px;
}
.stat {
    background: #fff; border: 1px solid var(--ink-100);
    border-radius: var(--radius);
    padding: 22px 18px; text-align: center;
}
.stat-num { font-size: 32px; font-weight: 700; color: var(--red); }
.stat-lbl { color: var(--ink-500); font-size: 13px; margin-top: 4px; }

/* =============================================================
   PRODUCTS
   ============================================================= */
.products-wrap { padding-top: 140px; }
.products-search {
    background: #fff; border: 1px solid var(--ink-100);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    box-shadow: var(--shadow-sm);
    display: flex; gap: 14px; align-items: center;
    flex-wrap: wrap;
}
.products-search .ps-input {
    flex: 1; min-width: 240px;
    height: 46px; padding: 0 18px 0 46px;
    border: 1px solid var(--ink-200);
    border-radius: 999px; outline: 0; background: #fff;
    transition: border-color .2s;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='11' cy='11' r='7'/><line x1='21' y1='21' x2='16.5' y2='16.5'/></svg>");
    background-repeat: no-repeat; background-position: 16px center; background-size: 18px;
}
.products-search .ps-input:focus { border-color: var(--red); }
.products-search .ps-btn {
    height: 46px; padding: 0 26px; border-radius: 999px;
    background: var(--red); color: #fff; font-weight: 600;
    transition: background .2s;
}
.products-search .ps-btn:hover { background: var(--red-dark); }
.products-search .ps-hint { font-size: 12.5px; color: var(--ink-400); }

.cat-pills {
    display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 6px;
}
.cat-pill {
    padding: 8px 18px; border-radius: 999px;
    background: #fff; border: 1px solid var(--ink-200);
    color: var(--ink-700); font-size: 13.5px; cursor: pointer;
    transition: all .2s var(--ease);
}
.cat-pill:hover { border-color: var(--red); color: var(--red); }
.cat-pill.active { background: var(--red); border-color: var(--red); color: #fff; }
.cat-pill .badge { margin-left: 6px; opacity: .75; font-size: 12px; }

.products-meta {
    display: flex; justify-content: space-between; align-items: center;
    margin: 24px 0 16px; color: var(--ink-500); font-size: 13.5px;
}
.products-meta .sort {
    background: #fff; border: 1px solid var(--ink-200);
    border-radius: 6px; padding: 6px 10px; font-size: 13px;
    outline: 0; cursor: pointer;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.product-card {
    background: #fff; border: 1px solid var(--ink-100);
    border-radius: var(--radius); overflow: hidden;
    display: flex; flex-direction: column;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;
}
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--red-soft); }
.product-thumb {
    aspect-ratio: 1/1;
    background: var(--ink-50);
    position: relative; overflow: hidden;
    display: grid; place-items: center;
}
.product-thumb img { width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .35s ease; }
.product-thumb img:not(.thumb-broken) { opacity: 1; }
.product-thumb .ph {
    width: 100%; height: 100%;
    display: grid; place-items: center;
    color: var(--ink-300);
    background: linear-gradient(135deg, #fafafa 0%, #ececec 100%);
}
.product-thumb .ph svg { width: 90px; height: 90px; opacity: .55; }
.product-thumb .tag-type {
    position: absolute; top: 10px; left: 10px;
    background: rgba(0,0,0,.55); color: #fff;
    font-size: 11px; padding: 3px 8px; border-radius: 4px;
    backdrop-filter: blur(6px);
}
.product-body { padding: 16px 16px 18px; display: flex; flex-direction: column; flex: 1; }
.product-name {
    font-size: 14px; font-weight: 500; color: var(--ink-900);
    line-height: 1.5; margin-bottom: 8px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden; min-height: 42px;
}
.product-code {
    font-family: ui-monospace, "SF Mono", Consolas, monospace;
    font-size: 12px; color: var(--ink-400);
    margin-bottom: 8px;
}
.product-spec {
    font-size: 12.5px; color: var(--ink-500); margin-bottom: 14px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden; min-height: 32px;
}
.product-foot { margin-top: auto; display: flex; flex-direction: column; gap: 10px; }
.product-price {
    display: flex; flex-direction: column; align-items: flex-start; gap: 0;
    color: var(--red); font-weight: 700; font-size: 18px;
}
.product-price .price-row {
    display: flex; align-items: baseline; gap: 4px; flex-wrap: nowrap; white-space: nowrap;
}
.product-price .sym { font-size: 13px; }
.product-price .note {
    font-size: 11.5px; font-weight: 400; color: var(--ink-400);
    margin-left: 6px;
}
.product-price .note-inline { margin-left: 6px; white-space: nowrap; }
.product-price .note-block {
    margin-left: 0;
    margin-top: 4px;
    white-space: nowrap;
}
.product-actions { display: flex; gap: 8px; }
.btn-pdf {
    flex: 1; text-align: center;
    padding: 9px 10px;
    border: 1px solid var(--ink-200); border-radius: 6px;
    font-size: 12.5px; color: var(--ink-700);
    transition: all .2s;
}
.btn-pdf:hover { border-color: var(--red); color: var(--red); }
.btn-pdf.disabled { color: var(--ink-400); cursor: not-allowed; background: var(--ink-50); }
.btn-pdf.disabled:hover { border-color: var(--ink-200); color: var(--ink-400); }
/* 有说明书：绿色超链接下载按钮 */
.btn-pdf.dl {
    color: #fff;
    background: #1f9d55;
    border-color: #1f9d55;
    font-weight: 600;
    text-decoration: none;
}
.btn-pdf.dl:hover { background: #188a49; border-color: #188a49; color: #fff; }
.btn-pdf svg { display: inline; vertical-align: -3px; margin-right: 4px; width: 13px; height: 13px; }

/* pagination */
.pagination {
    display: flex; justify-content: center; align-items: center; gap: 6px;
    margin-top: 40px;
}
.pagination button, .pagination span {
    min-width: 36px; height: 36px; padding: 0 12px;
    display: grid; place-items: center;
    border: 1px solid var(--ink-200); background: #fff;
    color: var(--ink-700); border-radius: 6px;
    font-size: 13px; cursor: pointer;
    transition: all .2s;
}
.pagination button:hover:not(:disabled) { border-color: var(--red); color: var(--red); }
.pagination button.active { background: var(--red); border-color: var(--red); color: #fff; }
.pagination button:disabled { opacity: .4; cursor: not-allowed; }
.pagination .ellipsis { border: 0; background: transparent; cursor: default; }
.pagination .ellipsis:hover { color: var(--ink-700); }

.empty-state {
    text-align: center; padding: 80px 20px; color: var(--ink-400);
}
.empty-state svg { width: 80px; height: 80px; opacity: .5; margin-bottom: 16px; }
.empty-state h3 { color: var(--ink-700); margin-bottom: 6px; font-size: 18px; }

/* =============================================================
   CONTACT
   ============================================================= */
.contact-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.contact-card {
    background: #fff; border: 1px solid var(--ink-100);
    border-radius: var(--radius-lg);
    padding: 36px;
    position: relative; overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.contact-card .badge-hq {
    position: absolute; top: 24px; right: 24px;
    padding: 4px 10px; border-radius: 4px;
    background: var(--red); color: #fff; font-size: 11px; font-weight: 600; letter-spacing: .1em;
}
.contact-card h3 { font-size: 22px; margin-bottom: 6px; }
.contact-card .cname-en { color: var(--ink-400); font-size: 13px; margin-bottom: 26px; letter-spacing: .04em; }
.contact-row { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.contact-row .ico {
    flex: 0 0 36px; height: 36px; border-radius: 8px;
    background: var(--red-soft); color: var(--red);
    display: grid; place-items: center;
}
.contact-row .ico svg { width: 16px; height: 16px; }
.contact-row .body { flex: 1; font-size: 14px; line-height: 1.7; }
.contact-row .label { color: var(--ink-400); font-size: 12px; margin-bottom: 2px; letter-spacing: .04em; }
.contact-row a { color: var(--red); }

/* 四川分公司：弱化视觉，突出北京总部 */
.contact-card--muted {
    background: #fafafa;
    border: 1px solid var(--ink-100);
    box-shadow: none;
    opacity: .82;
}
.contact-card--muted h3 { color: var(--ink-600); font-size: 20px; }
.contact-card--muted .cname-en { color: var(--ink-300); }
.contact-card--muted .contact-row .ico {
    background: #eef0f2; color: var(--ink-400);
}
.contact-card--muted .contact-row .body { color: var(--ink-500); }
.contact-card--muted .contact-row .label { color: var(--ink-300); }
.contact-card--muted .contact-row a { color: var(--ink-500); }
.contact-card--muted .badge-hq { background: var(--ink-400) !important; }

.partner-block {
    background: linear-gradient(135deg, #1a0808 0%, #2a0d0c 100%);
    border-radius: var(--radius-lg);
    padding: 50px;
    color: #fff;
    display: grid; grid-template-columns: 1.2fr 1fr;
    gap: 40px; align-items: center;
}
.partner-block h2 { color: #fff; font-size: 30px; margin-bottom: 14px; }
.partner-block p { color: rgba(255,255,255,.7); }
.partner-list {
    background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius); padding: 22px;
    display: flex; flex-direction: column; gap: 14px;
}
.partner-list .li { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.08); font-size: 14px; }
.partner-list .li:last-child { border-bottom: 0; }
.partner-list .li b { color: #fff; font-weight: 500; }
.partner-list .li span { color: rgba(255,255,255,.5); }

.notice-box {
    background: #fff; border: 1px solid var(--ink-100);
    border-left: 4px solid var(--red);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-top: 30px;
    color: var(--ink-700); font-size: 13.5px; line-height: 1.85;
}
.notice-box strong { color: var(--ink-900); }

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width: 1080px) {
    .footer-cols { grid-template-columns: 1fr 1fr; gap: 44px; }
    .footer-blurb { grid-column: 1 / -1; }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .cat-grid { grid-template-columns: repeat(3, 1fr); }
    .about-grid, .contact-cards, .partner-block { grid-template-columns: 1fr; }
    .scope-list { grid-template-columns: repeat(2, 1fr); }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .pillars { grid-template-columns: 1fr; }
    .cta-block { flex-direction: column; text-align: center; padding: 40px 28px; }
}
@media (max-width: 760px) {
    :root { --header-h: 60px; }
    .container { padding: 0 18px; }
    .section { padding: 56px 0; }
    .product-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .cat-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .stats-row { grid-template-columns: 1fr; max-width: 420px; }
    .rd-cards { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .nav { display: none; }
    .nav-cta { display: none; }
    .menu-btn {
        display: grid; place-items: center;
        position: absolute; right: 18px; top: 50%; transform: translateY(-50%);
        width: 40px; height: 40px; border-radius: 8px;
        color: var(--ink-800);
    }
    .site-header.on-cover .menu-btn { color: #fff; }
    .nav.open {
        display: flex; flex-direction: column;
        position: absolute; top: var(--header-h); left: 0; right: 0;
        background: #ffffff;
        padding: 16px 24px; gap: 8px;
        box-shadow: 0 8px 24px rgba(0,0,0,.08);
    }
    .nav.open a { padding: 12px 0; border-bottom: 1px solid var(--ink-100); }
    .nav.open a:last-child { border-bottom: 0; }
    /* 移动端：不显示下拉，仅 4 个主菜单 */
    .nav.open .dropdown { display: none; }
    /* 展开菜单：无论封面状态都强制深色文字，避免白底白字 */
    .site-header.on-cover .nav.open a,
    .nav.open a { color: var(--ink-800); }
    .site-header.on-cover .nav.open a:hover { color: var(--red); }
    .site-header.on-cover .nav.open a.active::after { background: var(--red); }
    .site-header.on-cover .nav.open .dropdown a { color: var(--ink-700); }
    .site-header.on-cover .nav.open .dropdown a:hover { color: var(--red); }
    .nav-inner { justify-content: flex-start; }
    .nav-inner .brand { position: static; transform: none; margin-left: 2px; }
    .brand-logo { height: 28px; }
    .brand-zh { font-size: 12px; }
    .hero-arrow { width: 40px; height: 40px; }
    .hero-arrow.prev { left: 14px; }
    .hero-arrow.next { right: 14px; }
    .hero-dots { bottom: 18px; }
    .cover-kicker { font-size: 22px; letter-spacing: .04em; }
    .cover-title { font-size: 34px; margin-bottom: 8px; }
    .cover-head { margin-bottom: 24px; }
    .cover-content { padding: 96px 14px 76px; }
    .cover-hint { display: none; }
    .search-tip { display: none; }
    .search-box { height: 56px; }
    .search-icon { flex-basis: 48px; }
    .search-btn { padding: 0 18px; font-size: 14px; }
    .search-input { font-size: 15px; }
    .section-eyebrow::before, .section-eyebrow::after { display: none; }
    .footer-top { flex-direction: column; align-items: flex-start; gap: 16px; }
    .footer-nav { gap: 22px; }
    .footer-cols { grid-template-columns: 1fr; gap: 34px; }
    .foot-bottom { flex-direction: column; }
    .page-hero { padding: 120px 0 40px; }
    .contact-card { padding: 26px; }
    .partner-block { padding: 30px 24px; }
    .pagination { flex-wrap: wrap; gap: 8px; }
    .products-search { flex-direction: column; align-items: stretch; }
    .products-search .ps-input { padding-left: 46px; }
    .product-actions { gap: 6px; }
    .btn-pdf { padding: 8px 6px; font-size: 12px; }
    .hot-panel { max-height: 60vh; }
    .qualify-card { width: 170px; }
    .qualify-card img { height: 226px; }
    .about-photo { height: 320px; min-height: 0; }
    .fact-row { grid-template-columns: 84px 1fr; }
    .location-addr { font-size: 14px; padding: 0 8px; }
}

/* ===== 480px 以下小屏手机深度适配 ===== */
@media (max-width: 480px) {
    .product-grid { gap: 10px; }
    .product-body { padding: 12px 12px 14px; }
    .product-name { font-size: 13px; min-height: 38px; }
    .product-actions { flex-direction: column; }
    .btn-pdf { width: 100%; padding: 9px 6px; }
    .cat-grid { gap: 10px; }
    .cat-card { padding: 20px 16px; }
    .cat-card .cat-arrow { right: 12px; top: 20px; width: 28px; height: 28px; }
    .pillars { gap: 14px; }
    .pillar { padding: 26px 20px; }
    .pillar-ico { width: 46px; height: 46px; }
    .section-title { font-size: 26px; }
    .section-head { margin-bottom: 36px; }
    .cover-kicker { font-size: 19px; }
    .cover-title { font-size: 28px; }
    .search-btn { padding: 0 14px; }
    .hero-track { aspect-ratio: 3 / 1; }
    .hero-caption { padding: 0 16px; bottom: 56px; }
    .hero-title { font-size: 24px; }
    .hero-sub { font-size: 14px; }
    .page-hero { padding: 104px 0 32px; }
    .page-hero h1 { font-size: 30px; }
    .contact-card { padding: 22px; }
    .contact-card .badge-hq { top: 16px; right: 16px; }
    .contact-card h3 { font-size: 19px; }
    .contact-row .ico { flex-basis: 32px; height: 32px; }
    .cta-block { padding: 28px 18px; }
    .cta-block h3 { font-size: 22px; }
    .cta-btn { width: 100%; justify-content: center; }
    .partner-block { padding: 24px 18px; gap: 24px; }
    .partner-list { padding: 16px; }
    .partner-list .li { flex-direction: column; align-items: flex-start; gap: 4px; }
    .footer-nav { gap: 16px; }
    .footer-nav a { font-size: 14px; }
    .foot-bottom { font-size: 11.5px; gap: 6px; }
    .foot-icp { flex-wrap: wrap; }
    .qualify-window { padding: 14px 0; }
    .qualify-card { width: 150px; }
    .qualify-card img { height: 200px; }
    .qualify-card figcaption { padding: 12px 14px; }
    .qualify-card figcaption strong { font-size: 13px; }
    .qualify-card figcaption span { font-size: 12px; }
    .about-photo { height: 260px; }
    .fact-row { grid-template-columns: 76px 1fr; gap: 8px; font-size: 13px; }
    .scope-list { grid-template-columns: 1fr; }
    .stats-row { gap: 12px; }
    .stat { padding: 18px 12px; }
    .stat-num { font-size: 26px; }
    .badge-row { gap: 12px; }
    .cert-badge { padding: 14px 16px; gap: 10px; }
    .cert-ico { width: 36px; height: 36px; }
    .cert-name { font-size: 14px; }
    .pagination button, .pagination span { min-width: 32px; height: 32px; padding: 0 8px; font-size: 12px; }
    .products-search { gap: 10px; }
    .products-search .ps-btn { width: 100%; }
    .products-meta { flex-direction: column; align-items: flex-start; gap: 10px; }
    .hot-item { padding: 10px 14px; }
    .hot-name { font-size: 13px; }
    .location-map { border-radius: 10px; }
    .map-link-hint { font-size: 12px; padding: 6px 14px; }
    .rd-card { padding: 18px 14px; }
    .rd-ico { width: 38px; height: 38px; }
    .rd-card h3 { font-size: 14.5px; }
    .rd-card p { font-size: 12.5px; }
    .focus-visual { min-height: 280px; }
    .dna { transform: scale(.8); }
    .focus-band { padding: 52px 0; }
    .notice-box { padding: 16px 18px; font-size: 13px; }
}

/* ===== about.html: 资质与研发实力 ===== */
.rd-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin: 30px 0 36px;
}
.rd-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 22px 20px;
    transition: transform .25s, box-shadow .25s, border-color .25s;
}
.rd-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0,0,0,.06);
    border-color: rgba(220,45,30,.3);
}
.rd-ico {
    width: 44px; height: 44px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 14px;
    color: #fff;
}
.rd-ico svg { width: 22px; height: 22px; }
.rd-ico--red { background: linear-gradient(135deg, var(--red), #c92a1a); }
.rd-ico--ink { background: linear-gradient(135deg, #2b2f36, #1a1d22); }
.rd-card h3 { font-size: 16px; font-weight: 700; color: var(--ink-900); margin-bottom: 6px; }
.rd-card p { font-size: 13.5px; color: var(--ink-500); line-height: 1.65; }

/* 专利 / 软著 混动窗口（横向自动播放，交叉排布） */
.qualify-window {
    position: relative;
    max-width: 1080px;
    margin: 8px auto 36px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fafafa;
    overflow: hidden;
    padding: 22px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,.04);
}
/* 左右柔化遮罩，暗示横向滚动 */
.qualify-window::before,
.qualify-window::after {
    content: "";
    position: absolute;
    top: 0; bottom: 0;
    width: 56px;
    z-index: 3;
    pointer-events: none;
}
.qualify-window::before {
    left: 0;
    background: linear-gradient(to right, #fafafa 25%, rgba(250,250,250,0));
}
.qualify-window::after {
    right: 0;
    background: linear-gradient(to left, #fafafa 25%, rgba(250,250,250,0));
}
.qualify-masonry {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    width: max-content;
    padding: 0 22px;
    animation: qualifyAutoScroll 48s linear infinite;
}
/* 鼠标悬停暂停自动播放 */
.qualify-window:hover .qualify-masonry { animation-play-state: paused; }
@keyframes qualifyAutoScroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}
.qualify-card {
    margin: 0;
    flex: 0 0 auto;
    width: 230px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,.04);
    transition: transform .25s, box-shadow .25s, border-color .25s;
}
.qualify-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0,0,0,.08);
    border-color: rgba(220,45,30,.3);
}
.qualify-card img {
    display: block;
    width: 100%;
    height: 300px;
    object-fit: contain;
    background: #f5f5f5;
}
.qualify-card figcaption {
    padding: 16px 20px;
    border-top: 1px solid var(--line);
    display: flex; flex-direction: column; gap: 2px;
}
.qualify-card figcaption strong { color: var(--ink-900); font-size: 15px; }
.qualify-card figcaption span { color: var(--ink-500); font-size: 13px; }

.badge-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin: 4px 0 12px;
}
.cert-badge {
    display: flex; align-items: center; gap: 14px;
    padding: 18px 20px;
    background: linear-gradient(135deg, #fff 0%, #faf6f5 100%);
    border: 1px solid var(--line);
    border-left: 4px solid var(--red);
    border-radius: 10px;
    transition: transform .2s, box-shadow .2s;
}
.cert-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(220,45,30,.1);
}
.cert-ico {
    width: 42px; height: 42px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--red);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
}
.cert-ico svg { width: 22px; height: 22px; }
.cert-name { font-size: 15.5px; font-weight: 700; color: var(--ink-900); margin-bottom: 2px; }
.cert-sub { font-size: 12px; color: var(--ink-500); letter-spacing: .2px; }

/* ===== about.html: 公司注册地 / 地图 ===== */
.location-addr {
    text-align: center;
    font-size: 15px;
    color: var(--ink-700);
    margin: 26px 0 22px;
    letter-spacing: .3px;
}
.location-addr::before {
    content: "📍 ";
}
.location-map {
    display: block;
    margin: 0 auto;
    max-width: 1080px;
    width: 100%;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 4px 18px rgba(0,0,0,.06);
    position: relative;
    cursor: pointer;
    transition: transform .25s, box-shadow .25s;
}
.location-map:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 36px rgba(220,45,30,.12);
    border-color: rgba(220,45,30,.3);
}
.location-map img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
    background: #eef1f4;
    transition: transform .4s ease;
}
.location-map:hover img { transform: scale(1.015); }
.map-link-hint {
    position: absolute;
    left: 50%; bottom: 16px;
    transform: translateX(-50%);
    padding: 8px 18px;
    background: rgba(0,0,0,.65);
    color: #fff;
    font-size: 13px;
    border-radius: 999px;
    backdrop-filter: blur(6px);
    pointer-events: none;
    opacity: 0;
    transition: opacity .25s;
}
.location-map:hover .map-link-hint { opacity: 1; }