/* ==========================================================================
   德宝堂 · 企业站样式
   纯原生 CSS（Flexbox / Grid），无框架依赖。主色：医疗青绿 #0d9488
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
    --brand: #0d9488;
    --brand-dark: #0f766e;
    --brand-deep: #134e4a;
    --brand-soft: #ecfdf9;
    --brand-line: #ccfbf1;
    --ink: #0f172a;
    --body: #52616f;
    --muted: #8a97a5;
    --line: #e6edf1;
    --bg: #ffffff;
    --soft: #f6fbfa;
    --radius-sm: 12px;
    --radius: 18px;
    --radius-lg: 26px;
    --shadow-sm: 0 2px 10px rgba(15, 23, 42, .05);
    --shadow: 0 14px 40px rgba(15, 23, 42, .08);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --container: 1180px;
}

/* ---------- 基础重置 ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    color: var(--body);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--brand); }
h1, h2, h3, h4 {
    color: var(--ink);
    line-height: 1.28;
    margin: 0 0 .6em;
    font-weight: 800;
    letter-spacing: -.01em;
}
h1 { font-size: clamp(2rem, 4.4vw, 3.2rem); }
h2 { font-size: clamp(1.55rem, 2.8vw, 2.3rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 6px; }

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

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 26px;
    border-radius: 999px;
    font-size: .95rem;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 10px 24px rgba(13, 148, 136, .22); }
.btn-primary:hover { background: var(--brand-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 14px 30px rgba(13, 148, 136, .28); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }
.btn-sm { padding: 9px 20px; font-size: .875rem; }

/* ---------- 顶部导航 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 6px 24px rgba(15, 23, 42, .05); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 78px; }

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { display: inline-flex; border-radius: 13px; overflow: hidden; box-shadow: 0 6px 16px rgba(13, 148, 136, .22); }
.brand-text { display: flex; flex-direction: column; line-height: 1.12; }
.brand-text strong { font-size: 1.22rem; color: var(--ink); letter-spacing: .06em; font-weight: 800; }
.brand-text em { font-style: normal; font-size: .6rem; letter-spacing: .18em; color: var(--muted); margin-top: 4px; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav > a {
    position: relative;
    padding: 9px 15px;
    border-radius: 10px;
    font-size: .95rem;
    font-weight: 500;
    color: #3d4b59;
}
.main-nav > a:hover { color: var(--brand); background: var(--brand-soft); }
.main-nav > a.active { color: var(--brand); font-weight: 600; }
.main-nav > a.active::after {
    content: "";
    position: absolute;
    left: 15px; right: 15px; bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: var(--brand);
}
.main-nav .nav-cta { margin-left: 10px; padding: 10px 22px; color: #fff; background: var(--brand); }
.main-nav .nav-cta:hover { color: #fff; background: var(--brand-dark); }
.main-nav .nav-cta.active::after { display: none; }

.nav-toggle {
    display: none;
    width: 44px; height: 44px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fff;
    cursor: pointer;
    padding: 12px 11px;
    flex-direction: column;
    justify-content: space-between;
}
.nav-toggle span { display: block; height: 2px; border-radius: 2px; background: var(--ink); transition: transform .25s ease, opacity .2s ease; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- 首页 Hero ---------- */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 620px;
    padding: 90px 0 100px;
    color: #fff;
    background: linear-gradient(100deg, rgba(6, 44, 42, .9) 0%, rgba(8, 70, 66, .74) 46%, rgba(13, 148, 136, .32) 100%), var(--hero-image) center/cover no-repeat;
    overflow: hidden;
}
.hero::after {
    content: "";
    position: absolute;
    right: -140px; bottom: -200px;
    width: 520px; height: 520px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, .13), transparent 68%);
    pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 660px; }
.hero .eyebrow { color: #99f6e4; }
.hero h1 { color: #fff; margin-bottom: 18px; text-shadow: 0 2px 24px rgba(0, 0, 0, .16); }
.hero p.lead { font-size: 1.12rem; color: rgba(255, 255, 255, .9); margin-bottom: 32px; max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero .btn-ghost { background: rgba(255, 255, 255, .12); border-color: rgba(255, 255, 255, .55); color: #fff; backdrop-filter: blur(4px); }
.hero .btn-ghost:hover { background: #fff; color: var(--brand-deep); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.hero-tags span {
    padding: 6px 14px;
    font-size: .8rem;
    border-radius: 999px;
    color: #d9fffa;
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .22);
}

.eyebrow {
    display: inline-block;
    margin-bottom: 14px;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--brand);
}

/* ---------- 数据条 ---------- */
.stats { position: relative; z-index: 2; margin-top: -58px; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    padding: 34px 10px;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
}
.stat { text-align: center; padding: 6px 18px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; font-size: 2rem; font-weight: 800; color: var(--brand); letter-spacing: -.02em; line-height: 1.2; }
.stat strong .unit { font-size: 1rem; font-weight: 700; margin-left: 2px; }
.stat span { font-size: .875rem; color: var(--muted); }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section-soft { background: var(--soft); }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--body); margin-bottom: 0; }
.section-foot { margin-top: 44px; text-align: center; }

/* ---------- 公司介绍 ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.about-media { position: relative; }
.about-media img { width: 100%; height: 460px; object-fit: cover; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.about-badge {
    position: absolute;
    right: -18px; bottom: -18px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 20px 26px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
}
.about-badge strong { font-size: 1.7rem; color: var(--brand); font-weight: 800; line-height: 1; }
.about-badge span { font-size: .8rem; color: var(--muted); }
.about-text p { color: var(--body); }
.about-list { margin: 26px 0 30px; display: grid; gap: 14px; }
.about-list li { display: flex; gap: 12px; align-items: flex-start; font-size: .96rem; }
.about-list .tick {
    flex: 0 0 22px;
    width: 22px; height: 22px;
    margin-top: 3px;
    border-radius: 50%;
    background: var(--brand-soft);
    color: var(--brand);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .7rem;
    font-weight: 700;
}

/* ---------- 产品卡片 ---------- */
.grid-products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.grid-products.cols-3 { grid-template-columns: repeat(3, 1fr); }
.product-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--brand-line); }
.product-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--brand-soft); }
.product-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.product-card:hover .product-media img { transform: scale(1.06); }
.product-body { display: flex; flex-direction: column; flex: 1; padding: 22px 22px 24px; }
.product-body h3 { font-size: 1.06rem; margin-bottom: 8px; }
.product-body p { font-size: .9rem; color: var(--body); margin-bottom: 18px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-body .product-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .875rem;
    font-weight: 600;
    color: var(--brand);
}
.product-body .product-link svg { transition: transform .2s ease; }
.product-card:hover .product-link svg { transform: translateX(3px); }

/* ---------- 科普卡片 ---------- */
.grid-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.info-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 32px 30px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: transform .25s ease, box-shadow .25s ease;
}
.info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.info-icon {
    width: 46px; height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 13px;
    background: var(--brand-soft);
    color: var(--brand);
}
.info-card h3 { margin: 4px 0 0; font-size: 1.06rem; }
.info-card p { margin: 0; font-size: .92rem; }
.info-card .tag { font-size: .74rem; letter-spacing: .12em; font-weight: 700; color: var(--brand); text-transform: uppercase; }

/* ---------- 科普文章列表 ---------- */
.article-list { display: grid; gap: 24px; }
.article-card {
    display: grid;
    grid-template-columns: 300px 1fr;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--brand-line); }
.article-thumb {
    position: relative;
    display: block;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: linear-gradient(135deg, var(--brand-deep), var(--brand));
}
.article-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.article-card:hover .article-thumb img { transform: scale(1.05); }
.article-thumb-fallback {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: rgba(255, 255, 255, .88);
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .18em;
}
.article-body { display: flex; flex-direction: column; padding: 28px 32px; min-width: 0; }
.article-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; font-size: .78rem; color: var(--muted); }
.article-meta .tag { color: var(--brand); font-weight: 700; letter-spacing: .12em; }
.article-body h3 { font-size: 1.22rem; margin-bottom: 10px; }
.article-body h3 a:hover { color: var(--brand); }
.article-body p {
    font-size: .93rem;
    color: var(--body);
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-more { margin-top: auto; display: inline-flex; align-items: center; gap: 6px; font-size: .875rem; font-weight: 600; color: var(--brand); }
.article-more svg { transition: transform .2s ease; }
.article-card:hover .article-more svg { transform: translateX(3px); }

/* 科普列表：一行 4 个卡片（响应式逐级降为 3 / 2 / 1 列） */
.science-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}
.science-grid .article-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}
.science-grid .article-thumb { aspect-ratio: 16 / 10; flex: 0 0 auto; }
.science-grid .article-body { flex: 1 1 auto; padding: 20px 20px 22px; }
.science-grid .article-meta { gap: 8px; margin-bottom: 8px; font-size: .74rem; }
.science-grid .article-body h3 {
    font-size: 1.02rem;
    line-height: 1.5;
    margin-bottom: 8px;
    /* 标题固定两行高度，保证不同卡片底部按钮对齐 */
    min-height: 3em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.science-grid .article-body p { font-size: .9rem; -webkit-line-clamp: 3; margin-bottom: 16px; }
.science-grid .article-more { font-size: .84rem; }

/* ---------- 科普文章详情 ---------- */
.article-detail { max-width: 860px; margin: 0 auto; }
.article-cover {
    margin: 0 0 34px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--brand-soft);
    box-shadow: var(--shadow-sm);
}
.article-cover img { width: 100%; max-height: 440px; object-fit: cover; }
.article-hero-meta { display: flex; flex-wrap: wrap; gap: 14px; font-size: .85rem; color: var(--muted); }
.article-content { max-width: none; font-size: 1rem; color: #3f4d5a; }
.article-content h3 { margin: 1.8em 0 .6em; font-size: 1.18rem; }
.article-content h3:first-child { margin-top: 0; }
.article-content p { margin-bottom: 1.1em; }
.article-content ul,
.article-content ol { margin: 0 0 1.2em; padding-left: 1.4em; display: grid; gap: 6px; }
.article-content ul li { list-style: disc; }
.article-content ol li { list-style: decimal; }
.article-content blockquote {
    margin: 1.4em 0;
    padding: 16px 22px;
    border-left: 3px solid var(--brand);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: var(--brand-soft);
    color: var(--brand-deep);
}
.article-content a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- CTA ---------- */
.cta-band {
    position: relative;
    overflow: hidden;
    padding: 60px 64px;
    border-radius: var(--radius-lg);
    background: linear-gradient(115deg, var(--brand-deep), var(--brand) 80%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}
.cta-band::after {
    content: "";
    position: absolute;
    right: -80px; top: -120px;
    width: 360px; height: 360px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .08);
}
.cta-band h2 { color: #fff; margin-bottom: 8px; position: relative; z-index: 1; }
.cta-band p { margin: 0; color: rgba(255, 255, 255, .82); position: relative; z-index: 1; }
.cta-band .btn { position: relative; z-index: 1; background: #fff; color: var(--brand-deep); box-shadow: none; }
.cta-band .btn:hover { background: #f0fdfa; color: var(--brand-deep); }

/* ---------- 内页头部 ---------- */
.page-hero {
    position: relative;
    padding: 72px 0 64px;
    background: linear-gradient(160deg, #f2fbf9 0%, #ffffff 70%);
    border-bottom: 1px solid var(--line);
}
.page-hero h1 { margin-bottom: 12px; font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
.page-hero p { max-width: 620px; margin: 0; color: var(--body); }
.breadcrumb { display: flex; gap: 8px; align-items: center; font-size: .82rem; color: var(--muted); margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--brand); }

/* ---------- 关于我们 ---------- */
.prose { max-width: 820px; }
.prose p { margin-bottom: 1.2em; }
.prose ul.bullets { list-style: disc; padding-left: 22px; display: grid; gap: 8px; }
.prose ul.bullets li { list-style: disc; }
.split { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: start; }
.panel {
    padding: 34px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}
.panel h3 { font-size: 1.02rem; margin-bottom: 16px; }
.panel dl { margin: 0; display: grid; gap: 14px; }
.panel dt { font-size: .78rem; letter-spacing: .1em; color: var(--muted); text-transform: uppercase; }
.panel dd { margin: 2px 0 0; color: var(--ink); font-weight: 600; font-size: .95rem; }
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.biz-item {
    padding: 26px 24px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.biz-item strong { display: block; color: var(--ink); margin-bottom: 6px; font-size: 1rem; }
.biz-item span { font-size: .88rem; color: var(--muted); }
.timeline { display: grid; gap: 0; border-left: 2px solid var(--brand-line); margin-left: 8px; }
.timeline li { position: relative; padding: 0 0 30px 30px; }
.timeline li::before {
    content: "";
    position: absolute;
    left: -8px; top: 6px;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--brand);
}
.timeline strong { display: block; color: var(--brand); font-weight: 800; font-size: .95rem; }
.timeline span { color: var(--body); font-size: .92rem; }

/* ---------- 产品详情 ---------- */
.detail-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: start; }
.detail-media { position: sticky; top: 100px; }
.detail-media img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow); aspect-ratio: 4 / 3; object-fit: cover; }
.detail-body h1 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
.detail-body .summary { font-size: 1.05rem; color: var(--body); padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.detail-content { white-space: pre-line; color: #44515e; font-size: .96rem; }
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.detail-note {
    margin-top: 26px;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    background: var(--brand-soft);
    color: var(--brand-deep);
    font-size: .85rem;
    border: 1px solid var(--brand-line);
}

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
.contact-cards { display: grid; gap: 16px; }
.contact-card {
    display: flex;
    gap: 16px;
    padding: 24px 26px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: border-color .2s ease, transform .2s ease;
}
.contact-card:hover { border-color: var(--brand-line); transform: translateY(-2px); }
.contact-card .info-icon { flex: 0 0 46px; }
.contact-card h3 { font-size: .95rem; margin-bottom: 4px; }
.contact-card p { margin: 0; font-size: .92rem; word-break: break-all; }
.contact-card a { color: var(--body); }
.contact-card a:hover { color: var(--brand); }

.form-card { padding: 38px 36px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: .85rem; font-weight: 600; color: var(--ink); margin-bottom: 7px; }
.field label .req { color: #e11d48; }
.field input, .field textarea, .field select {
    width: 100%;
    padding: 12px 14px;
    font-family: inherit;
    font-size: .94rem;
    color: var(--ink);
    background: #fbfdfd;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.field textarea { min-height: 132px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus {
    outline: none;
    background: #fff;
    border-color: var(--brand);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, .1);
}
.form-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 6px; }
.form-hint { font-size: .8rem; color: var(--muted); }
.alert { padding: 13px 18px; border-radius: var(--radius-sm); font-size: .9rem; margin-bottom: 20px; }
.alert-success { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

/* ---------- 空状态 ---------- */
.empty { padding: 60px 20px; text-align: center; color: var(--muted); background: #fff; border: 1px dashed var(--line); border-radius: var(--radius); }

/* ---------- 页脚 ---------- */
.site-footer { margin-top: 0; background: #07211f; color: rgba(255, 255, 255, .68); padding: 68px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1.4fr; gap: 48px; }
.brand-light .brand-text strong { color: #fff; }
.brand-light .brand-text em { color: rgba(255, 255, 255, .5); }
.footer-desc { margin: 20px 0 0; font-size: .9rem; line-height: 1.8; color: rgba(255, 255, 255, .6); max-width: 360px; }
.footer-col h4 { color: #fff; font-size: .95rem; margin-bottom: 20px; letter-spacing: .02em; }
.footer-col ul { display: grid; gap: 10px; font-size: .9rem; }
.footer-col a:hover { color: #5eead4; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { flex: 0 0 16px; margin-top: 6px; color: #2dd4bf; }
.footer-bottom {
    margin-top: 52px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, .1);
    display: flex;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    font-size: .82rem;
    color: rgba(255, 255, 255, .48);
}
.footer-bottom p { margin: 0; }
.footer-note { opacity: .8; }

/* ---------- 滚动动画（可选，JS 添加） ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .grid-products { grid-template-columns: repeat(3, 1fr); }
    .science-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .about-grid { gap: 40px; }
    .footer-grid { grid-template-columns: 1.3fr 1fr 1.2fr; gap: 34px; }
}

@media (max-width: 900px) {
    .section { padding: 72px 0; }
    .hero { min-height: 540px; padding: 70px 0 84px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); padding: 18px 6px; }
    .stat { border-right: 0; padding: 16px; }
    .stat:nth-child(odd) { border-right: 1px solid var(--line); }
    .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .about-grid, .detail-grid, .contact-grid, .split { grid-template-columns: 1fr; }
    .about-media img { height: 340px; }
    .about-badge { right: 14px; bottom: -16px; }
    .detail-media { position: static; }
    .grid-cards, .biz-grid { grid-template-columns: repeat(2, 1fr); }
    .grid-products, .grid-products.cols-3 { grid-template-columns: repeat(2, 1fr); }
    .article-card { grid-template-columns: 240px 1fr; }
    .science-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cta-band { padding: 44px 34px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }

    /* 移动端导航 */
    .nav-toggle { display: flex; }
    .main-nav {
        position: absolute;
        top: 78px; left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 14px 20px 22px;
        background: #fff;
        border-bottom: 1px solid var(--line);
        box-shadow: 0 20px 34px rgba(15, 23, 42, .08);
        display: none;
    }
    .main-nav.is-open { display: flex; }
    .main-nav > a { padding: 13px 14px; border-radius: 10px; font-size: 1rem; }
    .main-nav > a.active::after { display: none; }
    .main-nav > a.active { background: var(--brand-soft); }
    .main-nav .nav-cta { margin: 10px 0 0; text-align: center; }
}

@media (max-width: 620px) {
    .container { padding: 0 18px; }
    .header-inner { height: 68px; }
    .main-nav { top: 68px; }
    .brand-text strong { font-size: 1.08rem; }
    .brand-text em { font-size: .54rem; letter-spacing: .14em; }
    .hero { min-height: 480px; padding: 56px 0 76px; }
    .hero p.lead { font-size: 1rem; }
    .section { padding: 56px 0; }
    .section-head { margin-bottom: 30px; }
    .grid-products, .grid-products.cols-3, .grid-cards, .biz-grid, .form-row { grid-template-columns: 1fr; }
    .form-card { padding: 26px 20px; }
    .stats { margin-top: -44px; }
    .stat strong { font-size: 1.6rem; }
    .cta-band { padding: 34px 24px; border-radius: var(--radius); }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; }
    .product-body { padding: 18px 18px 20px; }
    .panel, .info-card, .biz-item { padding: 24px 20px; }
    .article-card { grid-template-columns: 1fr; }
    .science-grid { grid-template-columns: 1fr; gap: 18px; }
    .science-grid .article-thumb { aspect-ratio: 16 / 9; }
    .article-thumb { aspect-ratio: 16 / 9; }
    .article-body { padding: 22px 20px; }
    .article-cover { margin-bottom: 24px; border-radius: var(--radius); }
}