/* =====================================================================
   主题 t9 · 沉浸全宽（immersive）
   设计语言：全宽 band 拼接、巨型字号、深色交替、零边框零阴影。
   与 t1-t8 显著差异：完全摒弃 .card / .hero-card / .adv 的「块状组件」结构，
   改用 section.iv-band 全宽背景色块，靠字号、字距、配色营造沉浸感。
   ===================================================================== */

/* ============================ 基础覆盖 ============================ */
:root {
    --iv-bg: #ffffff;
    --iv-bg-alt: #0f172a;
    --iv-bg-warm: #fafaf7;
    --iv-text: #0f172a;
    --iv-text-soft: #475569;
    --iv-text-inv: rgba(255, 255, 255, .86);
    --iv-line: #e5e9f0;
    --iv-radius: 0;
}

body {
    color: var(--iv-text);
    background: var(--iv-bg);
    font-feature-settings: "kern", "liga";
}

a:hover { color: var(--site-primary); }

/* ============================ 页头 ============================ */
.iv-header {
    position: absolute;
    left: 0; right: 0; top: 0;
    z-index: 30;
    background: transparent;
    color: #fff;
}
.iv-header.is-stuck,
body:not(.iv-home) .iv-header {
    position: sticky;
    background: rgba(15, 23, 42, .94);
    backdrop-filter: saturate(1.4) blur(10px);
    border-bottom: 0;
}
.iv-header-inner {
    display: flex; align-items: center; gap: 24px; min-height: 78px;
}
.iv-brand { display: flex; align-items: center; gap: 12px; color: inherit; }
.iv-brand-logo { width: 38px; height: 38px; object-fit: contain; border-radius: 50%; background: #fff; padding: 4px; }
.iv-brand-text { font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.iv-nav { display: flex; gap: 24px; margin-left: auto; }
.iv-nav a {
    padding: 6px 2px;
    font-size: 15px;
    color: inherit;
    border-bottom: 2px solid transparent;
    transition: color .18s ease, border-color .18s ease;
}
.iv-nav a:hover { color: #fff; opacity: 1; }
.iv-nav a.is-active { color: #fff; border-bottom-color: var(--site-secondary); }
.iv-phone {
    flex: none;
    padding: 8px 18px;
    border: 1px solid currentColor;
    border-radius: 999px;
    font-weight: 700;
    letter-spacing: .5px;
}
.iv-phone:hover { background: var(--site-secondary); border-color: var(--site-secondary); color: #fff; }

/* 公告条 */
.iv-announce { background: #000; color: #fff; font-size: 13px; }
.iv-announce .wrap { display: flex; gap: 14px; padding: 9px 0; }
.iv-announce em { font-style: normal; padding: 1px 9px; background: var(--site-secondary); color: #fff; border-radius: 999px; font-size: 12px; }

/* 面包屑 */
.iv-crumb { background: var(--iv-bg-alt); color: var(--iv-text-inv); font-size: 13px; padding-top: 100px; padding-bottom: 14px; }
.iv-crumb .wrap { display: flex; gap: 10px; align-items: center; }
.iv-crumb a { color: var(--iv-text-inv); opacity: .8; }
.iv-crumb a:hover { opacity: 1; color: var(--site-secondary); }
.iv-crumb i { opacity: .4; }

/* ============================ 首屏（巨型） ============================ */
.iv-hero {
    position: relative;
    min-height: 86vh;
    background: var(--iv-bg-alt);
    color: #fff;
    display: flex; align-items: center;
    overflow: hidden;
    isolation: isolate;
}
.iv-hero::before {
    content: ""; position: absolute; inset: 0;
    background:
        radial-gradient(900px 600px at 80% 20%, rgba(6, 182, 212, .18), transparent 60%),
        radial-gradient(700px 500px at 10% 80%, rgba(244, 63, 94, .12), transparent 60%);
    pointer-events: none;
    z-index: -1;
}
.iv-hero-eyebrow {
    font-size: 12px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--site-secondary);
    margin-bottom: 28px;
}
.iv-hero-title {
    font-size: clamp(46px, 7vw, 96px);
    line-height: 1.02;
    font-weight: 800;
    letter-spacing: -1px;
    margin: 0 0 28px;
    max-width: 18ch;
}
.iv-hero-desc {
    font-size: 18px;
    line-height: 1.65;
    color: var(--iv-text-inv);
    max-width: 56ch;
    margin-bottom: 36px;
}
.iv-hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 36px; }
.iv-hero-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
.iv-hero-tags li {
    padding: 5px 14px;
    border: 1px solid rgba(255, 255, 255, .25);
    font-size: 13px;
    border-radius: 999px;
}

/* ============================ 按钮 ============================ */
.iv-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 48px; padding: 0 26px;
    border: 1px solid transparent; border-radius: 999px;
    font-size: 15px; font-weight: 600;
    cursor: pointer;
    transition: transform .15s ease, background .18s ease, color .18s ease;
}
.iv-btn:hover { transform: translateY(-1px); }
.iv-btn-primary { background: var(--site-primary); color: #fff; }
.iv-btn-primary:hover { background: var(--site-secondary); color: #fff; }
.iv-btn-outline { border-color: #fff; color: #fff; background: transparent; }
.iv-btn-outline:hover { background: #fff; color: var(--iv-text); }
.iv-btn-ghost { background: transparent; color: inherit; border-color: currentColor; }
.iv-btn-ghost:hover { background: currentColor; color: var(--iv-bg-alt); }
.iv-btn-block { width: 100%; margin-top: 8px; }

/* ============================ 通用 band（节区） ============================ */
.iv-band {
    padding: calc(96px * var(--site-density)) 0;
    border-bottom: 1px solid transparent;
}
.iv-band-alt { background: var(--iv-bg-warm); }
.iv-band-stats { background: var(--iv-bg-alt); color: #fff; padding: calc(72px * var(--site-density)) 0; }
.iv-band-products { background: var(--iv-bg); }
.iv-band-advantages { background: var(--iv-bg-alt); color: #fff; }
.iv-band-about { background: var(--iv-bg); }
.iv-band-faq { background: var(--iv-bg-warm); }
.iv-band-news { background: var(--iv-bg-alt); color: #fff; }
.iv-band-links { background: var(--iv-bg); }
.iv-band-cta { background: var(--site-primary); color: #fff; text-align: center; padding: calc(120px * var(--site-density)) 0; }
.iv-band-cta-sm { padding: calc(72px * var(--site-density)) 0; }
.iv-band-cta h2 { font-size: clamp(32px, 5vw, 56px); line-height: 1.15; max-width: 22ch; margin: 0 auto 18px; }
.iv-band-cta p { font-size: 17px; opacity: .9; margin: 0 auto 32px; max-width: 56ch; }
.iv-band-cta .iv-hero-cta { justify-content: center; margin-bottom: 0; }
.iv-band-cta .iv-btn-primary { background: #fff; color: var(--site-primary); }
.iv-band-cta .iv-btn-primary:hover { background: var(--site-secondary); color: #fff; }
.iv-band-cta .iv-btn-ghost { color: #fff; border-color: #fff; }
.iv-band-cta .iv-btn-ghost:hover { background: #fff; color: var(--site-primary); }

/* ============================ 栏目标题 ============================ */
.iv-section-title {
    display: flex; flex-direction: column; gap: 8px; margin: 0 0 56px;
    font-size: 14px; letter-spacing: 3px; text-transform: uppercase; color: var(--iv-text-soft);
}
.iv-section-title em {
    font-style: normal;
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800;
    line-height: 1.1;
    color: var(--iv-text);
    letter-spacing: -1px;
    text-transform: none;
}
.iv-section-title.iv-light em,
.iv-section-title.iv-light span { color: #fff; opacity: .55; }
.iv-section-title.iv-light em { color: #fff; opacity: 1; }
.iv-section-eyebrow {
    display: inline-block;
    margin-bottom: 14px;
    padding: 4px 14px;
    background: var(--site-secondary);
    color: #fff;
    font-size: 12px;
    letter-spacing: 3px;
    text-transform: uppercase;
}

/* ============================ 数据卖点条 ============================ */
.iv-band-stats .wrap {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0;
}
.iv-stat {
    padding: 14px 26px;
    border-left: 1px solid rgba(255, 255, 255, .14);
}
.iv-stat:first-child { border-left: 0; }
.iv-stat strong { display: block; font-size: 28px; font-weight: 800; line-height: 1.2; margin-bottom: 4px; }
.iv-stat p { margin: 0; font-size: 13px; opacity: .65; letter-spacing: 1px; }

/* ============================ 产品横向条 ============================ */
.iv-product-strip { display: grid; gap: 0; border-top: 1px solid var(--iv-line); }
.iv-product-card {
    display: grid;
    grid-template-columns: 56px 1.4fr 2fr auto;
    align-items: center;
    gap: 24px;
    padding: 26px 4px;
    border-bottom: 1px solid var(--iv-line);
    transition: background .15s ease, color .15s ease;
}
.iv-product-card:hover { background: var(--iv-bg-warm); color: var(--iv-text); }
.iv-product-no {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 13px;
    color: var(--site-primary);
    letter-spacing: 1px;
}
.iv-product-name { font-size: 20px; font-weight: 700; }
.iv-product-sum { font-size: 14px; color: var(--iv-text-soft); }
.iv-product-arrow { font-size: 22px; color: var(--site-primary); }

/* 产品网格（产品页） */
.iv-product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.iv-product-tile {
    background: #fff;
    border: 1px solid var(--iv-line);
    border-radius: 16px;
    overflow: hidden;
    transition: transform .15s ease, box-shadow .18s ease;
}
.iv-product-tile:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(15, 23, 42, .08); }
.iv-product-tile-thumb {
    position: relative; display: block;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: linear-gradient(135deg, var(--site-primary), var(--site-secondary));
}
.iv-product-tile-thumb img { width: 100%; height: 100%; object-fit: cover; }
.iv-product-tile-ph {
    display: flex; align-items: center; justify-content: center;
    width: 100%; height: 100%; color: #fff; font-size: 22px; font-weight: 700;
}
.iv-product-tile-no {
    position: absolute; top: 14px; left: 14px;
    padding: 4px 10px; background: #fff; color: var(--iv-text);
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 12px; letter-spacing: 1px;
    border-radius: 999px;
}
.iv-product-tile-text { padding: 22px 22px 24px; }
.iv-product-tile-text h3 { font-size: 18px; margin-bottom: 8px; }
.iv-product-tile-text p { color: var(--iv-text-soft); font-size: 14px; margin-bottom: 14px; }
.iv-product-tile-foot {
    display: flex; justify-content: space-between; align-items: center;
    padding-top: 14px; border-top: 1px solid var(--iv-line);
    font-size: 13px;
}
.iv-product-tile-foot span { color: var(--site-primary); font-weight: 700; }
.iv-product-tile-foot a { color: var(--iv-text); }
.iv-product-tile-foot a:hover { color: var(--site-primary); }

/* 产品详情：图集 */
.iv-pd-wrap { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: start; }
.iv-pd-gallery { position: sticky; top: 24px; }
.iv-pd-main {
    aspect-ratio: 4 / 3; background: linear-gradient(135deg, var(--site-primary), var(--site-secondary));
    border-radius: 18px; overflow: hidden;
    display: flex; align-items: center; justify-content: center;
}
.iv-pd-main img { width: 100%; height: 100%; object-fit: cover; }
.iv-pd-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 14px; }
.iv-pd-thumbs img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; border-radius: 8px; cursor: pointer; }
.iv-pd-info h1 { font-size: clamp(32px, 4vw, 48px); line-height: 1.15; margin-bottom: 14px; letter-spacing: -1px; }
.iv-pd-sub { color: var(--site-primary); font-size: 14px; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 22px; }
.iv-pd-sum { font-size: 17px; color: var(--iv-text-soft); margin-bottom: 20px; }
.iv-pd-price { font-size: 22px; color: var(--site-secondary); font-weight: 700; margin-bottom: 26px; }
.iv-pd-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0 0 32px; list-style: none; }
.iv-pd-tags li {
    padding: 5px 12px; border: 1px solid var(--iv-line); border-radius: 999px;
    font-size: 13px; color: var(--iv-text-soft);
}
.iv-pd-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--iv-line); font-size: 13px; color: var(--iv-text-soft); }
.iv-pd-badges span { padding: 4px 12px; background: var(--iv-bg-warm); border-radius: 999px; }

/* 参数表 */
.iv-param-table {
    width: 100%; border-collapse: collapse;
    border-top: 1px solid var(--iv-line);
}
.iv-param-table th,
.iv-param-table td {
    padding: 16px 18px;
    border-bottom: 1px solid var(--iv-line);
    text-align: left;
    font-size: 15px;
}
.iv-param-table th {
    width: 200px;
    color: var(--iv-text-soft);
    font-weight: 600;
    background: var(--iv-bg-warm);
}

/* ============================ 优势（竖排） ============================ */
.iv-adv-list { display: grid; gap: 36px; padding: 0; margin: 0; list-style: none; }
.iv-adv-item {
    display: grid; grid-template-columns: 80px 1fr; gap: 28px;
    padding-bottom: 36px;
    border-bottom: 1px solid rgba(255, 255, 255, .14);
}
.iv-adv-item:last-child { border-bottom: 0; padding-bottom: 0; }
.iv-adv-no {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 28px;
    color: var(--site-secondary);
    font-weight: 700;
    letter-spacing: 1px;
}
.iv-adv-item h3 { font-size: 24px; margin-bottom: 8px; }
.iv-adv-item p { margin: 0; color: var(--iv-text-inv); opacity: .85; }
.iv-band-advantages .iv-adv-item { border-bottom-color: rgba(255, 255, 255, .14); }
.iv-band-advantages .iv-adv-item p { color: rgba(255, 255, 255, .82); }
.iv-band-about .iv-adv-list .iv-adv-item { border-bottom-color: var(--iv-line); }
.iv-band-about .iv-adv-list .iv-adv-item p { color: var(--iv-text-soft); }

/* 关于 */
.iv-about-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 64px; align-items: start; }
.iv-about-head h2 {
    font-size: clamp(36px, 5vw, 60px); line-height: 1.1;
    font-weight: 800; letter-spacing: -1px;
}
.iv-about-head { padding-right: 24px; border-right: 2px solid var(--iv-line); }
.iv-about-body .iv-btn-outline {
    border-color: var(--iv-text); color: var(--iv-text);
}
.iv-about-body .iv-btn-outline:hover { background: var(--iv-text); color: #fff; }

/* ============================ FAQ ============================ */
.iv-faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.iv-faq-item {
    background: #fff;
    padding: 22px 24px;
    border: 1px solid var(--iv-line);
    border-radius: 12px;
}
.iv-band-alt .iv-faq-item { background: #fff; }
.iv-band-advantages .iv-faq-item,
.iv-band-news .iv-faq-item {
    background: transparent;
    border-color: rgba(255, 255, 255, .16);
    color: #fff;
}
.iv-faq-item summary {
    cursor: pointer;
    font-weight: 700;
    font-size: 16px;
    list-style: none;
}
.iv-faq-item summary::-webkit-details-marker { display: none; }
.iv-faq-item summary::after {
    content: "+"; float: right; font-size: 24px; line-height: 1;
    color: var(--site-primary); transition: transform .18s ease;
}
.iv-faq-item[open] summary::after { content: "−"; }
.iv-faq-item p {
    margin: 14px 0 0; color: var(--iv-text-soft); font-size: 14px;
}
.iv-band-advantages .iv-faq-item summary::after,
.iv-band-news .iv-faq-item summary::after { color: var(--site-secondary); }
.iv-band-advantages .iv-faq-item p,
.iv-band-news .iv-faq-item p { color: rgba(255, 255, 255, .8); }

/* ============================ 新闻（表格化） ============================ */
.iv-news-table { display: grid; gap: 0; padding: 0; margin: 0; list-style: none; border-top: 1px solid rgba(255, 255, 255, .14); }
.iv-news-table li {
    display: grid;
    grid-template-columns: 56px 1.8fr auto auto;
    grid-template-areas: "no title date cat" "no sum sum sum";
    gap: 4px 20px;
    padding: 26px 0;
    border-bottom: 1px solid rgba(255, 255, 255, .14);
    align-items: baseline;
}
.iv-news-no { grid-area: no; font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 13px; color: var(--site-secondary); letter-spacing: 1px; }
.iv-news-title { grid-area: title; font-size: 22px; font-weight: 700; }
.iv-news-title:hover { color: var(--site-secondary); }
.iv-news-date { grid-area: date; color: var(--iv-text-inv); opacity: .7; font-size: 13px; }
.iv-news-cat { grid-area: cat; font-size: 12px; padding: 2px 10px; border: 1px solid rgba(255, 255, 255, .3); border-radius: 999px; }
.iv-news-sum { grid-area: sum; color: rgba(255, 255, 255, .7); font-size: 14px; margin: 6px 0 0; }

.iv-news-table-lg li { grid-template-columns: 60px 2fr auto auto; }
.iv-news-table-lg .iv-news-title { font-size: 24px; }

/* 列表页：浅底版新闻表 */
.iv-band:not(.iv-band-news) .iv-news-table,
.iv-band:not(.iv-band-news) .iv-news-table li { color: var(--iv-text); }
.iv-band:not(.iv-band-news) .iv-news-table li { border-bottom-color: var(--iv-line); }
.iv-band:not(.iv-band-news) .iv-news-table { border-top-color: var(--iv-line); }
.iv-band:not(.iv-band-news) .iv-news-date { color: var(--iv-text-soft); opacity: 1; }
.iv-band:not(.iv-band-news) .iv-news-sum { color: var(--iv-text-soft); }
.iv-band:not(.iv-band-news) .iv-news-cat { border-color: var(--iv-line); }

/* ============================ 分类筛选（沉浸版） ============================ */
.iv-filter { display: flex; flex-wrap: wrap; gap: 0; margin-bottom: 36px; border-top: 1px solid var(--iv-line); border-bottom: 1px solid var(--iv-line); }
.iv-filter-item { padding: 14px 22px; border-right: 1px solid var(--iv-line); font-size: 14px; }
.iv-filter-item:last-child { border-right: 0; }
.iv-filter-item:hover { background: var(--iv-bg-warm); color: var(--site-primary); }
.iv-filter-item.is-active { color: var(--site-primary); font-weight: 700; }

/* ============================ 分页 ============================ */
.iv-pager { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; padding: 32px 0 0; }
.iv-pg-btn, .iv-pg-num {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 42px; height: 42px; padding: 0 14px;
    border: 1px solid var(--iv-line); border-radius: 999px;
    font-size: 14px;
}
.iv-pg-num.is-active { background: var(--site-primary); color: #fff; border-color: var(--site-primary); }
.iv-pg-total { font-size: 13px; color: var(--iv-text-soft); align-self: center; padding-left: 8px; }

/* ============================ 列表头（页面头） ============================ */
.iv-page-head {
    background: var(--iv-bg-alt);
    color: #fff;
    padding: 120px 0 64px;
}
.iv-page-head h1 {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 14px;
}
.iv-page-sub {
    font-size: 17px;
    color: rgba(255, 255, 255, .72);
    max-width: 56ch;
}

/* ============================ 列表/详情页布局 ============================ */
.iv-article-wrap { display: grid; grid-template-columns: 1fr 320px; gap: 80px; align-items: start; }
.iv-article { font-size: 16px; line-height: 1.85; color: var(--iv-text); }
.iv-article-title { font-size: clamp(30px, 4vw, 46px); font-weight: 800; letter-spacing: -1px; line-height: 1.18; margin-bottom: 18px; }
.iv-article-meta {
    display: flex; flex-wrap: wrap; gap: 14px;
    padding: 14px 0;
    border-top: 1px solid var(--iv-line);
    border-bottom: 1px solid var(--iv-line);
    color: var(--iv-text-soft); font-size: 13px;
    margin-bottom: 26px;
}
.iv-article-lead { font-size: 18px; color: var(--iv-text-soft); margin-bottom: 24px; padding-left: 16px; border-left: 3px solid var(--site-secondary); }
.iv-article-figure { margin: 0 0 30px; border-radius: 14px; overflow: hidden; }
.iv-article-figure img { width: 100%; height: auto; }
.iv-article-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 24px 0 0; margin-top: 28px; border-top: 1px solid var(--iv-line); align-items: center; }
.iv-article-tags em { font-size: 13px; color: var(--iv-text-soft); margin-right: 4px; }
.iv-article-tags span { font-size: 13px; padding: 4px 12px; background: var(--iv-bg-warm); border-radius: 999px; }
.iv-article-block { margin-top: 40px; }
.iv-article-block h2 { font-size: 26px; margin-bottom: 18px; }
.iv-prev-next {
    display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
    margin-top: 36px; padding-top: 24px;
    border-top: 1px solid var(--iv-line);
    font-size: 14px;
}
.iv-prev-next a:hover { color: var(--site-primary); }

/* 侧栏 */
.iv-side { position: sticky; top: 24px; display: grid; gap: 20px; }
.iv-side-card {
    background: var(--iv-bg-warm);
    padding: 24px;
    border-radius: 14px;
}
.iv-side-card h3 { font-size: 17px; margin-bottom: 14px; }
.iv-side-card ul { padding: 0; margin: 0; list-style: none; }
.iv-side-card li { padding: 8px 0; border-bottom: 1px dashed var(--iv-line); display: flex; justify-content: space-between; font-size: 14px; gap: 10px; }
.iv-side-card li:last-child { border-bottom: 0; }
.iv-side-card li em { color: var(--iv-text-soft); }
.iv-side-card p { font-size: 14px; color: var(--iv-text-soft); margin: 0 0 8px; }
.iv-side-phone { color: var(--site-primary) !important; font-size: 22px !important; font-weight: 700; }
.iv-side-card .iv-btn-block { margin-top: 8px; }
.iv-side-card .iv-btn-primary.iv-btn-block { margin-top: 14px; }
.iv-side-card .iv-btn-outline.iv-btn-block { color: var(--iv-text); border-color: var(--iv-text); }

/* 联系方式（联系页） */
.iv-contact-wrap { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: start; }
.iv-contact-list { padding: 0; margin: 0 0 32px; list-style: none; }
.iv-contact-list li {
    display: grid; grid-template-columns: 120px 1fr; gap: 20px;
    padding: 18px 0;
    border-bottom: 1px solid var(--iv-line);
    align-items: baseline;
}
.iv-contact-list li:last-child { border-bottom: 0; }
.iv-contact-list li em { color: var(--iv-text-soft); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; }
.iv-contact-list li a, .iv-contact-list li span { font-size: 16px; font-weight: 600; }

/* 留言表单 */
.iv-message-box { background: var(--iv-bg-alt); color: #fff; padding: 40px; border-radius: 18px; }
.iv-message-box h2 { font-size: 26px; margin-bottom: 8px; }
.iv-message-box > p { color: rgba(255, 255, 255, .65); margin-bottom: 26px; }
.iv-form-row { margin-bottom: 18px; }
.iv-form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.iv-form-row label { display: block; font-size: 13px; margin-bottom: 6px; color: rgba(255, 255, 255, .7); letter-spacing: 1px; }
.iv-form-row label i { color: var(--site-secondary); font-style: normal; }
.iv-form-row input, .iv-form-row textarea {
    width: 100%; padding: 12px 14px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, .25);
    border-radius: 8px;
    color: #fff; font-size: 15px;
    font-family: inherit;
    outline: none;
    transition: border-color .15s ease;
}
.iv-form-row input:focus, .iv-form-row textarea:focus { border-color: var(--site-secondary); }
.iv-form-row textarea { resize: vertical; min-height: 120px; }
.iv-form-row input::placeholder, .iv-form-row textarea::placeholder { color: rgba(255, 255, 255, .4); }
.iv-message-box .iv-btn-primary { background: var(--site-secondary); color: #fff; }
.iv-message-box .iv-btn-primary:hover { background: #fff; color: var(--iv-bg-alt); }
.iv-message-result { margin: 14px 0 0; font-size: 14px; min-height: 1.4em; }
.iv-message-result.is-error { color: #fca5a5; }
.iv-message-result.is-ok { color: #6ee7b7; }

/* 兄弟站点 / 服务区域 */
.iv-region-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.iv-region-cloud a {
    padding: 6px 14px; border: 1px solid var(--iv-line); border-radius: 999px;
    font-size: 13px; color: var(--iv-text-soft);
}
.iv-region-cloud a:hover { background: var(--site-primary); color: #fff; border-color: var(--site-primary); }
.iv-region-cloud-sm a { font-size: 12px; padding: 4px 10px; }
.iv-region-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
.iv-region-grid a { font-size: 13px; color: var(--iv-text-soft); padding: 4px 0; }

/* 空态 / 更多 */
.iv-empty {
    padding: 60px 20px;
    text-align: center;
    color: var(--iv-text-soft);
    background: var(--iv-bg-warm);
    border-radius: 12px;
}
.iv-more {
    display: inline-block;
    margin-top: 32px;
    font-size: 14px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--site-primary);
    border-bottom: 1px solid var(--site-primary);
    padding-bottom: 4px;
}

/* ============================ 页脚 ============================ */
.iv-footer {
    background: var(--iv-bg-alt);
    color: var(--iv-text-inv);
    padding: calc(96px * var(--site-density)) 0 32px;
}
.iv-footer-eyebrow {
    font-size: 13px; letter-spacing: 3px; text-transform: uppercase;
    color: var(--site-secondary); margin-bottom: 14px;
}
.iv-footer-phone {
    font-size: clamp(40px, 6vw, 64px);
    margin: 0 0 24px;
    line-height: 1.1;
}
.iv-footer-phone a:hover { color: var(--site-secondary); }
.iv-footer-name { font-size: 17px; opacity: .65; margin-bottom: 64px; }
.iv-footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    padding: 56px 0;
    border-top: 1px solid rgba(255, 255, 255, .14);
    border-bottom: 1px solid rgba(255, 255, 255, .14);
}
.iv-footer-grid h4 { font-size: 13px; letter-spacing: 3px; text-transform: uppercase; opacity: .5; margin-bottom: 16px; }
.iv-footer-grid a, .iv-footer-grid p { display: block; font-size: 14px; color: rgba(255, 255, 255, .82); margin: 0 0 8px; }
.iv-footer-grid a:hover { color: var(--site-secondary); }
.iv-footer-bottom {
    display: flex; flex-wrap: wrap; gap: 18px;
    padding-top: 32px;
    font-size: 12px; color: rgba(255, 255, 255, .5);
}
.iv-footer-bottom a { color: inherit; }
.iv-footer-bottom a:hover { color: var(--site-secondary); }

/* ============================ 404 ============================ */
.iv-band-404 { padding: calc(160px * var(--site-density)) 0; text-align: center; }
.iv-404-code {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: clamp(120px, 18vw, 220px);
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, var(--site-primary), var(--site-secondary));
    -webkit-background-clip: text; background-clip: text;
    color: transparent;
    margin-bottom: 24px;
}
.iv-404 h1 { font-size: clamp(24px, 3vw, 36px); margin-bottom: 14px; }
.iv-404-desc { font-size: 16px; color: var(--iv-text-soft); max-width: 56ch; margin: 0 auto 28px; }
.iv-404 .iv-hero-cta { justify-content: center; margin-bottom: 36px; }
.iv-404-links p { font-size: 13px; letter-spacing: 2px; text-transform: uppercase; color: var(--iv-text-soft); margin-bottom: 16px; }
.iv-404-links .iv-region-cloud { justify-content: center; }

/* ============================ 响应式 ============================ */
@media (max-width: 1024px) {
    .iv-band { padding: calc(72px * var(--site-density)) 0; }
    .iv-hero { min-height: 70vh; }
    .iv-product-grid { grid-template-columns: repeat(2, 1fr); }
    .iv-article-wrap, .iv-pd-wrap, .iv-about-grid, .iv-contact-wrap { grid-template-columns: 1fr; gap: 40px; }
    .iv-about-head { border-right: 0; padding-right: 0; border-bottom: 2px solid var(--iv-line); padding-bottom: 24px; }
    .iv-side { position: static; }
}
@media (max-width: 720px) {
    .iv-hero-cta .iv-btn, .iv-btn { min-height: 44px; padding: 0 20px; font-size: 14px; }
    .iv-product-strip .iv-product-card { grid-template-columns: 36px 1fr auto; gap: 12px; }
    .iv-product-sum { display: none; }
    .iv-news-table li { grid-template-columns: 36px 1fr auto; grid-template-areas: "no title date" "no sum sum"; }
    .iv-news-cat { display: none; }
    .iv-nav { gap: 16px; }
    .iv-nav a { font-size: 13px; }
    .iv-product-grid { grid-template-columns: 1fr; }
    .iv-faq-grid { grid-template-columns: 1fr; }
    .iv-form-row-2 { grid-template-columns: 1fr; }
    .iv-message-box { padding: 26px; }
    .iv-filter-item { padding: 10px 14px; font-size: 13px; }
}