@charset "UTF-8";
/* ==========================================================================
   prof-ling-2026 · 凌博士官网前台模板
   纯原生 CSS，无框架依赖。结构：令牌 → 基础 → 布局 → 组件 → 页面 → 响应式
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
    /* 品牌色：延续站点深蓝科技感，收敛为克制的单色阶 */
    --brand-900: #0a2342;
    --brand-800: #10355f;
    --brand-700: #164a82;
    --brand-600: #215c9c;
    --brand-500: #2f6fb5;
    --brand-300: #9cc2ea;
    --brand-100: #eaf2fb;

    --ink: #14202e;
    --ink-2: #3c4c60;
    --ink-3: #6b7b8f;
    --line: #e3eaf3;
    --line-strong: #cdd9e8;

    --surface: #ffffff;
    --surface-2: #f6f9fc;
    --surface-3: #eef4fa;
    --on-dark: #ffffff;

    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;

    --shadow-1: 0 2px 14px rgba(10, 35, 66, .06);
    --shadow-2: 0 14px 40px rgba(10, 35, 66, .12);
    --shadow-3: 0 24px 64px rgba(10, 35, 66, .18);

    --container: 1200px;
    --gutter: 24px;
    --header-h: 76px;
    --section-y: 96px;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC",
        "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
    --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;

    --ease: cubic-bezier(.22, .61, .36, 1);
    --dur: .45s;

    /* 移动端轮播的填充背景：index.html 每张幻灯片会覆盖为同图 URL；
       未提供时降级为品牌深蓝渐变 */
    --hero-bg: linear-gradient(180deg, #1a4c86, #081d38);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 24px);
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--surface);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.75;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img,
video { max-width: 100%; height: auto; display: block; border: 0; }
img { background: var(--surface-2); }

a { color: inherit; text-decoration: none; transition: color .25s var(--ease); }
a:hover { color: var(--brand-600); }

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 .6em;
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: .01em;
}
p { margin: 0 0 1.15em; }
ul, ol { margin: 0 0 1.15em; padding-left: 1.4em; }
li { margin-bottom: .35em; }
button { font: inherit; cursor: pointer; }
button, input, textarea, select { font-family: inherit; }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }

:focus-visible {
    outline: 3px solid var(--brand-500);
    outline-offset: 3px;
    border-radius: 3px;
}

::selection { background: var(--brand-300); color: var(--brand-900); }

.skip-link {
    position: absolute;
    left: 16px;
    top: -60px;
    z-index: 999;
    padding: 10px 18px;
    background: var(--brand-900);
    color: #fff;
    border-radius: var(--radius-xs);
    transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; color: #fff; }

.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0);
    white-space: nowrap; border: 0;
}

/* ---------- 3. 布局 ---------- */
.container {
    width: min(100% - (var(--gutter) * 2), var(--container));
    margin-inline: auto;
}
.container--narrow { max-width: 860px; }

.section { padding-block: var(--section-y); }
.section--tint { background: var(--surface-2); }
.section--compact { padding-block: 64px; }

.section-head { margin-bottom: 52px; text-align: center; }
.section-head--left { text-align: left; }
.eyebrow {
    display: block;
    margin-bottom: 14px;
    color: var(--brand-600);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .24em;
    text-transform: uppercase;
}
.section-title {
    margin: 0;
    font-size: clamp(26px, 3.2vw, 38px);
    font-weight: 600;
    letter-spacing: .04em;
}
.section-title::after {
    content: "";
    display: block;
    width: 40px;
    height: 3px;
    margin: 20px auto 0;
    border-radius: 3px;
    background: var(--brand-500);
}
.section-head--left .section-title::after,
.section-title--left::after { margin-left: 0; }
.section-lead {
    max-width: 680px;
    margin: 18px auto 0;
    color: var(--ink-3);
    font-size: 15px;
}
.section-head--left .section-lead { margin-left: 0; }

.grid { display: grid; gap: 28px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 4. 按钮 / 链接 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 46px;
    padding: 10px 28px;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    background: var(--brand-700);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: .06em;
    transition: background .25s var(--ease), color .25s var(--ease),
                border-color .25s var(--ease), transform .25s var(--ease),
                box-shadow .25s var(--ease);
}
.btn:hover { background: var(--brand-900); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-2); }
.btn--ghost { background: transparent; border-color: var(--line-strong); color: var(--brand-800); }
.btn--ghost:hover { background: var(--brand-700); border-color: var(--brand-700); color: #fff; }
.btn--light { background: #fff; color: var(--brand-900); }
.btn--light:hover { background: var(--brand-100); color: var(--brand-900); }
.btn--sm { min-height: 38px; padding: 7px 20px; font-size: 13px; }

.btn .arrow { font-size: 17px; line-height: 1; transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--brand-700);
    font-size: 14px;
    font-weight: 500;
}
.text-link:hover { color: var(--brand-900); }
.text-link .arrow { transition: transform .25s var(--ease); }
.text-link:hover .arrow { transform: translateX(4px); }

.center-actions { margin-top: 44px; text-align: center; }

/* ---------- 5. 站点头部 / 导航 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    height: var(--header-h);
    background: rgba(255, 255, 255, .94);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--line);
    transition: background .3s var(--ease), border-color .3s var(--ease),
                box-shadow .3s var(--ease), height .3s var(--ease),
                backdrop-filter .3s var(--ease);
}
.site-header.is-scrolled {
    height: 66px;
    box-shadow: var(--shadow-1);
}
.header-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}
.brand { display: flex; align-items: center; flex: 0 0 auto; }
/* 站点 logo 为白色字标（线上 /static/upload/image/20220629/...png）：
   白底导航下转为深色才可见，首页透明态再还原为纯白 */
.brand img {
    width: auto; max-height: 46px; object-fit: contain;
    background: transparent;
    filter: brightness(0) opacity(.86);
    transition: filter .3s var(--ease);
}

.nav { display: flex; align-items: center; gap: 34px; margin-left: auto; }
.nav__link {
    position: relative;
    padding: 8px 0;
    color: var(--ink-2);
    font-size: 15px;
    font-weight: 500;
    white-space: nowrap;
}
.nav__link::after {
    content: "";
    position: absolute;
    left: 0; right: 100%; bottom: 0;
    height: 2px;
    background: var(--brand-600);
    transition: right .3s var(--ease);
}
.nav__link:hover::after,
.nav__link.is-active::after { right: 0; }
.nav__link.is-active { color: var(--brand-800); }

.header-actions { display: flex; align-items: center; gap: 14px; }
.header-shop {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-pill);
    color: var(--brand-800);
    font-size: 13px;
    font-weight: 500;
    transition: all .25s var(--ease);
}
.header-shop:hover { border-color: var(--brand-600); background: var(--brand-100); }

.menu-toggle {
    display: none;
    width: 44px; height: 44px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--brand-900);
    align-items: center;
    justify-content: center;
}
.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
    display: block;
    width: 20px; height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.menu-toggle span { position: relative; }
.menu-toggle span::before,
.menu-toggle span::after { content: ""; position: absolute; left: 0; }
.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }
.menu-toggle[aria-expanded="true"] span { background: transparent; }
.menu-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

/* --- 首页顶部透明导航：叠加在轮播大图上，滚动后恢复白底实色 ---
   :is() 是容错选择器列表：不支持 :has() 的旧浏览器会忽略前半段，
   由 main.js 给 <body> 添加 .has-hero 兜底；其余 7 个内页不受影响。 */
:is(body:has(.hero), body.has-hero) .site-header {
    position: fixed;
    left: 0; right: 0;
    width: 100%;
}
:is(body:has(.hero), body.has-hero) .site-header:not(.is-scrolled) {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom-color: transparent;
    box-shadow: none;
}
:is(body:has(.hero), body.has-hero) .site-header:not(.is-scrolled) .brand img { filter: none; }
:is(body:has(.hero), body.has-hero) .site-header:not(.is-scrolled) .nav__link,
:is(body:has(.hero), body.has-hero) .site-header:not(.is-scrolled) .nav__link:hover {
    color: rgba(255, 255, 255, .94);
}
:is(body:has(.hero), body.has-hero) .site-header:not(.is-scrolled) .nav__link::after { background: #fff; }
:is(body:has(.hero), body.has-hero) .site-header:not(.is-scrolled) .header-shop {
    color: #fff;
    border-color: rgba(255, 255, 255, .55);
    background: rgba(10, 35, 66, .12);
}
:is(body:has(.hero), body.has-hero) .site-header:not(.is-scrolled) .header-shop:hover {
    color: #fff;
    border-color: #fff;
    background: rgba(255, 255, 255, .16);
}
:is(body:has(.hero), body.has-hero) .site-header:not(.is-scrolled) .menu-toggle {
    color: #fff;
    border-color: rgba(255, 255, 255, .5);
    background: rgba(10, 35, 66, .18);
}
/* 首页滚动态固定头高度为 66px，系列导航吸顶位置同步 */
:is(body:has(.hero), body.has-hero) .series-nav { top: 66px; }

.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 70;
    background: rgba(10, 35, 66, .42);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s var(--ease), visibility .3s var(--ease);
}
.drawer-backdrop.is-open { opacity: 1; visibility: visible; }

.drawer {
    position: fixed;
    top: 0; right: 0;
    z-index: 71;
    width: min(86vw, 340px);
    height: 100dvh;
    padding: 28px 26px 40px;
    overflow-y: auto;
    background: var(--surface);
    box-shadow: var(--shadow-3);
    transform: translateX(100%);
    transition: transform .35s var(--ease);
}
.drawer.is-open { transform: translateX(0); }
.drawer__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    color: var(--brand-800);
    font-size: 13px;
    letter-spacing: .18em;
}
.drawer__close {
    width: 36px; height: 36px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: transparent;
    color: var(--ink-2);
    font-size: 20px;
    line-height: 1;
}
.drawer__nav { list-style: none; margin: 0; padding: 0; }
.drawer__nav li { margin: 0; border-bottom: 1px solid var(--line); }
.drawer__nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 2px;
    color: var(--ink);
    font-size: 16px;
}
.drawer__nav a::after { content: "↗"; color: var(--brand-300); font-size: 14px; }
.drawer__nav a.is-active { color: var(--brand-700); font-weight: 600; }
.drawer__foot { margin-top: 32px; }

/* ---------- 6. 首页 Hero 轮播 ---------- */
.hero {
    position: relative;
    overflow: hidden;
    background: var(--brand-900);
}
/* 仅顶部压暗：保证透明导航的白字 / 白 logo 可读，不影响图片主体 */
.hero::before {
    content: "";
    position: absolute;
    z-index: 1;
    top: 0; left: 0; right: 0;
    height: clamp(88px, 14vw, 180px);
    background: linear-gradient(180deg,
        rgba(6, 24, 48, .46) 0%, rgba(6, 24, 48, .16) 45%, transparent 100%);
    pointer-events: none;
}
.hero__viewport { position: relative; }
.hero__track { display: flex; transition: transform .8s var(--ease); }
.hero__slide {
    position: relative;
    flex: 0 0 100%;
    min-width: 0;
    /* 后台轮播原图实测 1920×1242，按原始比例展示，上下不再被裁切 */
    aspect-ratio: 1920 / 1242;
    overflow: hidden;
    background: var(--brand-900);
}
.hero__slide img {
    width: 100%; height: 100%;
    object-fit: contain;   /* 完整显示，不裁切；比例不同时留深色边 */
    background: var(--brand-900);
}
.hero__slide::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 74%, rgba(6, 24, 48, .26) 100%);
    pointer-events: none;
}
.hero__caption {
    position: absolute;
    z-index: 2;
    left: 0; right: 0;
    top: 38%;
    transform: translateY(-50%);
}
.hero__caption .container { max-width: var(--container); }
.hero__title {
    max-width: 720px;
    margin: 0 0 14px;
    color: #fff;
    font-size: clamp(28px, 4.4vw, 56px);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: .03em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, .25);
}
.hero__subtitle {
    max-width: 640px;
    margin: 0;
    color: rgba(255, 255, 255, .86);
    font-size: clamp(14px, 1.6vw, 19px);
}
.hero__controls {
    position: absolute;
    z-index: 3;
    left: 0; right: 0; bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
}
.hero__arrow {
    display: grid;
    place-items: center;
    width: 42px; height: 42px;
    border: 1px solid rgba(255, 255, 255, .55);
    border-radius: 50%;
    background: rgba(10, 35, 66, .18);
    color: #fff;
    font-size: 20px;
    line-height: 1;
    transition: background .25s var(--ease), transform .25s var(--ease);
}
.hero__arrow:hover { background: rgba(255, 255, 255, .24); color: #fff; transform: scale(1.06); }
.hero__dots { display: flex; gap: 9px; }
.hero__dot {
    width: 9px; height: 9px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, .45);
    transition: width .3s var(--ease), background .3s var(--ease);
}
.hero__dot.is-active { width: 26px; border-radius: 6px; background: #fff; }

/* ---------- 7. 首页内容区 ---------- */
.home-intro { padding-block: 72px; }
.home-intro .container { max-width: 980px; text-align: center; }

.founder__media {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2);
}
.founder__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.founder__body { display: flex; flex-direction: column; justify-content: center; }
.founder__list { list-style: none; margin: 0 0 28px; padding: 0; }
.founder__list li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 10px;
    color: var(--ink-2);
    font-size: clamp(16px, 1.5vw, 19px);
}
.founder__list li::before {
    content: "";
    position: absolute;
    left: 0; top: .78em;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--brand-500);
}
.founder__year { max-width: 280px; margin: 0 0 28px; }
.founder__actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* 星品推荐 */
.product-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
}
.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--brand-300);
    box-shadow: var(--shadow-2);
}
.product-card__media {
    display: block;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: var(--surface-3);
}
.product-card__media img {
    width: 100%; height: 100%;
    object-fit: contain;
    background: #fff;
    transition: transform .6s var(--ease);
}
.product-card:hover .product-card__media img { transform: scale(1.05); }
.product-card__body {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 22px 18px;
    text-align: center;
}
.product-card__title { margin: 0; font-size: 17px; font-weight: 500; letter-spacing: .04em; }

/* 全线产品 */
.series-nav {
    position: sticky;
    top: var(--header-h);
    z-index: 20;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 18px 0;
    background: rgba(246, 249, 252, .92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.series-nav a {
    padding: 8px 22px;
    border-radius: var(--radius-pill);
    color: var(--ink-2);
    font-size: 14px;
    background: transparent;
    transition: all .25s var(--ease);
}
.series-nav a:hover,
.series-nav a.is-active { background: var(--brand-700); color: #fff; }

.series-tile {
    position: relative;
    display: block;
    aspect-ratio: 1 / 1.12;
    overflow: hidden;
    border-radius: var(--radius);
    background-color: var(--brand-800);
    background-size: cover;
    background-position: center;
    isolation: isolate;
}
.series-tile::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(180deg, rgba(8, 28, 54, .05) 35%, rgba(8, 28, 54, .72) 100%);
    transition: background .35s var(--ease);
}
.series-tile:hover::before { background: linear-gradient(180deg, rgba(8, 28, 54, .18) 20%, rgba(8, 28, 54, .82) 100%); }
.series-tile__title {
    position: absolute;
    z-index: 2;
    left: 0; right: 0; bottom: 0;
    margin: 0;
    padding: 26px 20px;
    color: #fff;
    font-size: clamp(20px, 2vw, 26px);
    font-weight: 500;
    letter-spacing: .08em;
    text-align: center;
}
.series-tile:hover { color: #fff; }
.series-tile__en {
    display: block;
    margin-top: 6px;
    font-size: 11px;
    font-weight: 400;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, .72);
}

/* 媒体资讯 */
.news-list { border-top: 1px solid var(--line); }
.news-item {
    display: grid;
    grid-template-columns: 150px 1fr auto;
    align-items: center;
    gap: 28px;
    padding: 26px 8px;
    border-bottom: 1px solid var(--line);
    transition: background .25s var(--ease), padding .25s var(--ease);
}
.news-item:hover { background: var(--surface-2); padding-left: 18px; }
.news-item__date {
    color: var(--ink-3);
    font-size: 14px;
    font-variant-numeric: tabular-nums;
    letter-spacing: .04em;
}
.news-item__title { margin: 0; font-size: 17px; font-weight: 500; line-height: 1.6; }
.news-item__tag {
    display: inline-block;
    padding: 4px 14px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-pill);
    color: var(--brand-700);
    font-size: 12px;
    white-space: nowrap;
}
.news-item__tag:hover { border-color: var(--brand-500); background: var(--brand-100); }

/* ---------- 8. 内页通用 ---------- */
.page-hero {
    position: relative;
    display: flex;
    align-items: center;
    min-height: clamp(280px, 38vw, 460px);
    background-color: var(--brand-800);
    background-size: cover;
    background-position: center;
    overflow: hidden;
}
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(8, 28, 54, .58), rgba(8, 28, 54, .12));
}
.page-hero__inner { position: relative; z-index: 1; padding-block: 70px; }
.page-hero__title {
    margin: 0;
    color: #fff;
    font-size: clamp(30px, 4vw, 48px);
    font-weight: 500;
    letter-spacing: .1em;
}
.page-hero__sub {
    display: block;
    margin-top: 12px;
    color: rgba(255, 255, 255, .78);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: .26em;
    text-transform: uppercase;
}

.breadcrumb {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
    font-size: 13px;
    color: var(--ink-3);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.breadcrumb li { margin: 0; }
.breadcrumb li + li::before { content: "/"; margin-right: 10px; color: var(--line-strong); }
.breadcrumb a:hover { color: var(--brand-700); }

/* 后台富文本统一样式 */
.prose { max-width: 100%; color: var(--ink-2); font-size: 16px; line-height: 1.9; }
.prose > :last-child { margin-bottom: 0; }
.prose h2, .prose h3, .prose h4 { margin-top: 1.6em; color: var(--ink); }
.prose img { max-width: 100%; height: auto; margin: 12px auto; border-radius: var(--radius-sm); }
.prose table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.prose th, .prose td { padding: 10px 14px; border: 1px solid var(--line); }
.prose th { background: var(--surface-2); }
.prose blockquote {
    margin: 24px 0;
    padding: 12px 22px;
    border-left: 3px solid var(--brand-500);
    background: var(--surface-2);
    color: var(--ink-2);
}
.prose a { color: var(--brand-700); text-decoration: underline; text-underline-offset: 3px; }
.prose iframe { max-width: 100%; }

/* 产品系列分组 */
.series-group { scroll-margin-top: calc(var(--header-h) + 80px); padding-top: 24px; }
.series-group__title {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin: 0 0 36px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--brand-100);
    font-size: clamp(22px, 2.4vw, 30px);
    font-weight: 500;
    letter-spacing: .08em;
}
.series-group__title small {
    color: var(--brand-500);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: .2em;
    text-transform: uppercase;
}
.product-tile { height: 100%; text-align: center; }
.product-tile__media {
    display: block;
    overflow: hidden;
    border-radius: var(--radius);
    background: var(--surface-2);
    border: 1px solid var(--line);
}
.product-tile__media img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    background: #fff;
    transition: transform .6s var(--ease);
}
.product-tile__media:hover img { transform: scale(1.04); }
.product-tile__name { margin: 20px 0 4px; font-size: 18px; font-weight: 500; }
.product-tile__cat { display: block; color: var(--ink-3); font-size: 14px; }

/* 文章列表 */
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; align-items: start; }
.article-card {
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 26px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}
.article-card:first-child { padding-top: 0; }
.article-card__media {
    display: block;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--surface-2);
}
.article-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.article-card__media:hover img { transform: scale(1.06); }
.article-card__title { margin: 0 0 12px; font-size: 19px; font-weight: 500; line-height: 1.55; }
.article-card__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; color: var(--ink-3); font-size: 13px; }
.article-card__tag {
    padding: 3px 12px;
    border-radius: var(--radius-pill);
    background: var(--brand-100);
    color: var(--brand-700);
    font-size: 12px;
}

.sidebar { position: sticky; top: calc(var(--header-h) + 28px); }
.side-block { margin-bottom: 38px; }
.side-block__title {
    margin: 0 0 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--brand-700);
    font-size: 17px;
    font-weight: 600;
}
.side-list { list-style: none; margin: 0; padding: 0; }
.side-list li { margin: 0; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 14px; line-height: 1.65; }
.side-list a { color: var(--ink-2); }
.side-list a:hover { color: var(--brand-700); }
.side-product { display: flex; gap: 12px; align-items: center; padding: 12px 0; border-bottom: 1px dashed var(--line); }
.side-product img { width: 68px; height: 68px; object-fit: cover; border-radius: var(--radius-xs); }
.side-product__body { min-width: 0; }
.side-product__time { display: block; color: var(--ink-3); font-size: 12px; }
.side-product__title { margin: 3px 0 0; font-size: 14px; font-weight: 500; line-height: 1.5; }

/* 分页 */
.pagination { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; margin-top: 44px; }
.pagination a,
.pagination span {
    min-width: 38px;
    padding: 7px 14px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-xs);
    color: var(--ink-2);
    font-size: 14px;
    text-align: center;
    transition: all .2s var(--ease);
}
.pagination a:hover { border-color: var(--brand-500); color: var(--brand-700); }
.pagination .page-num-current { border-color: var(--brand-700); background: var(--brand-700); color: #fff; }
.pagination .page-num-current:hover { color: #fff; }
.empty-note { padding: 60px 0; color: var(--ink-3); text-align: center; }

/* 文章详情 */
.article-detail__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-bottom: 20px; color: var(--ink-3); font-size: 14px; }
.article-detail__title { margin: 0 0 36px; font-size: clamp(24px, 3vw, 34px); line-height: 1.45; }
.article-detail__body { padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.article-share { display: flex; align-items: center; gap: 12px; margin-top: 30px; }
.article-share__label { color: var(--ink-3); font-size: 13px; letter-spacing: .1em; }
.copy-link {
    padding: 7px 18px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--ink-2);
    font-size: 13px;
    transition: all .25s var(--ease);
}
.copy-link:hover { border-color: var(--brand-500); color: var(--brand-700); }
.pager { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; margin-top: 32px; }
.pager a {
    padding: 10px 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    color: var(--ink-2);
    font-size: 14px;
}
.pager a:hover { border-color: var(--brand-500); color: var(--brand-700); }

/* 产品详情 */
.product-hero__media { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-2); }
.product-hero__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.product-hero__subtitle { color: var(--ink-3); font-size: 17px; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.info-card {
    padding: 34px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-1);
}
.info-card__title { margin: 0 0 18px; color: var(--brand-800); font-size: 20px; }
.info-card p { margin-bottom: 10px; color: var(--ink-2); }

/* ---------- 9. 页脚 ---------- */
.qr-strip { padding-block: 56px; border-top: 1px solid var(--line); background: var(--surface-2); }
.qr-strip__inner { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: clamp(24px, 5vw, 72px); }
.qr-item { text-align: center; }
.qr-item img { width: 116px; height: 116px; object-fit: contain; margin: 0 auto 10px; border-radius: var(--radius-sm); background: #fff; }
.qr-item span { color: var(--ink-3); font-size: 13px; }

.site-footer { background: var(--brand-900); color: rgba(255, 255, 255, .74); }
.footer__main { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 56px; padding-block: 64px 48px; }
.footer__brand img { width: 180px; max-width: 100%; margin-bottom: 20px; background: transparent; }
.footer__slogan { margin: 0; font-size: 14px; line-height: 1.9; color: rgba(255, 255, 255, .6); }
.footer__cols { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.footer__title { margin: 0 0 18px; color: #fff; font-size: 15px; font-weight: 600; letter-spacing: .06em; }
.footer__list { list-style: none; margin: 0; padding: 0; }
.footer__list li { margin: 0 0 9px; font-size: 13px; line-height: 1.6; }
.footer__list a { color: rgba(255, 255, 255, .66); }
.footer__list a:hover { color: #fff; }

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 18px;
    padding-block: 22px;
    border-top: 1px solid rgba(255, 255, 255, .12);
    font-size: 13px;
}
.footer__bottom a:hover { color: #fff; }
.footer__sns { display: flex; gap: 10px; }
.footer__sns a {
    display: grid;
    place-items: center;
    width: 36px; height: 36px;
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 50%;
    color: rgba(255, 255, 255, .8);
    transition: all .25s var(--ease);
}
.footer__sns a:hover { border-color: #fff; background: rgba(255, 255, 255, .12); color: #fff; }
.footer__sns svg { width: 17px; height: 17px; fill: currentColor; }

.back-to-top {
    position: fixed;
    right: 24px; bottom: 24px;
    z-index: 40;
    display: grid;
    place-items: center;
    width: 44px; height: 44px;
    border: 0;
    border-radius: 50%;
    background: var(--brand-700);
    color: #fff;
    box-shadow: var(--shadow-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all .3s var(--ease);
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--brand-900); color: #fff; }
.back-to-top svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; }

/* ---------- 10. 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1080px) {
    :root { --section-y: 76px; }
    .nav { gap: 22px; }
    .article-layout { grid-template-columns: minmax(0, 1fr) 250px; gap: 36px; }
    .footer__main { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 900px) {
    .nav, .header-shop { display: none; }
    .menu-toggle { display: flex; }
    .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .article-layout { grid-template-columns: minmax(0, 1fr); }
    .sidebar { position: static; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
    .news-item { grid-template-columns: 120px 1fr; gap: 14px; }
    .news-item__tag { display: none; }
    .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }

    /* 平板 / 手机：横版原图等比缩放会被压成窄带（390px 宽仅 252px 高，产品极小）。
       改用更高的展示区，图片仍 100% 完整居中，上下由同一张图放大模糊延伸填充，
       不裁切任何内容，也不再是一条扁横幅。--hero-bg 由 index.html 的幻灯片标签提供。 */
    .hero__slide {
        aspect-ratio: 4 / 3;
        background-image: var(--hero-bg);
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        isolation: isolate;
    }
    .hero__slide::before {
        content: "";
        position: absolute;
        inset: 0;
        z-index: 0;
        background: rgba(6, 24, 48, .08);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
    }
    .hero__slide > a { position: relative; z-index: 1; }
    .hero__slide img { background: transparent; }
    .hero__slide::after { z-index: 2; }
    .hero__caption { z-index: 3; }
}

@media (max-width: 640px) {
    :root { --gutter: 18px; --section-y: 60px; --header-h: 64px; }
    body { font-size: 15px; }
    .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
    .grid--2 { gap: 20px; }
    .section-head { margin-bottom: 36px; text-align: left; }
    .section-title::after { margin-left: 0; }
    .section-lead { margin-left: 0; }
    .hero__slide { aspect-ratio: 1 / 1; }
    .hero__caption { top: 34%; }
    .hero__controls { bottom: 16px; gap: 10px; }
    .hero__arrow { display: none; }
    .founder__media { max-height: 340px; }
    .product-card__media { aspect-ratio: 4 / 3; }
    .series-tile { aspect-ratio: 16 / 9; }
    .series-nav { overflow-x: auto; flex-wrap: nowrap; justify-content: flex-start; padding-inline: var(--gutter); }
    .series-nav a { flex: 0 0 auto; }
    .news-item { display: block; padding: 20px 0; }
    .news-item__date { display: block; margin-bottom: 6px; font-size: 13px; }
    .news-item__title { font-size: 16px; }
    .article-card { grid-template-columns: 110px minmax(0, 1fr); gap: 16px; }
    .article-card__title { font-size: 16px; }
    .sidebar { grid-template-columns: minmax(0, 1fr); }
    .contact-grid { grid-template-columns: minmax(0, 1fr); }
    .info-card { padding: 26px; }
    .qr-strip__inner { gap: 20px; }
    .qr-item img { width: 92px; height: 92px; }
    .footer__cols { gap: 20px; }
    .footer__bottom { flex-direction: column; text-align: center; }
    .back-to-top { right: 16px; bottom: 16px; }
}

/* ---------- 12. 无障碍 / 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal { opacity: 1; transform: none; }
}

@media print {
    .site-header, .drawer, .drawer-backdrop, .back-to-top, .hero__controls, .qr-strip, .footer__sns { display: none !important; }
    body { color: #000; }
}