/* ==========================================================================
   泰州福升汇兴管道科技有限公司 · 官网样式
   设计基调：工业深蓝 + 冷灰 + 精工细节
   ========================================================================== */

:root {
    --navy: #0a2540;
    --navy-2: #113352;
    --blue: #023793;
    --blue-light: #1a5fd0;
    --blue-soft: #e8eefb;
    --steel: #64748b;
    --ink: #0f172a;
    --body: #475569;
    --muted: #94a3b8;
    --line: #e2e8f0;
    --bg: #ffffff;
    --bg-soft: #f6f8fb;
    --radius: 6px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
    --shadow: 0 4px 16px rgba(15, 23, 42, .08);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, .12);
    --wrap: 1280px;
    --ease: cubic-bezier(.4, 0, .2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.75;
    color: var(--body);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--blue); }
ul, ol { list-style: none; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.35; font-weight: 700; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

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

/* ---------- 顶部信息条 ---------- */
.topbar {
    background: var(--navy);
    color: rgba(255, 255, 255, .72);
    font-size: 13px;
    line-height: 1;
}
.topbar .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 38px;
}
.topbar-l span { letter-spacing: .3px; }
.topbar .hotline b { color: #fff; font-size: 15px; letter-spacing: .5px; margin-left: 6px; }

/* ---------- 头部 ---------- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .96);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--line);
    transition: box-shadow .3s var(--ease);
}
.header.scrolled { box-shadow: var(--shadow); }
.header-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 84px;
}

.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo img { height: 44px; width: auto; }
.logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.logo-text strong { font-size: 17px; color: var(--navy); letter-spacing: .2px; }
.logo-text small { font-size: 11.5px; color: var(--muted); letter-spacing: .2px; }

/* 导航 */
.nav { margin-left: auto; }
.nav > ul { display: flex; align-items: center; gap: 2px; }
.nav > ul > li { position: relative; }
.nav > ul > li > a {
    display: block;
    padding: 0 15px;
    height: 84px;
    line-height: 84px;
    font-size: 15.5px;
    font-weight: 500;
    color: var(--ink);
    position: relative;
    white-space: nowrap;
}
.nav > ul > li > a::after {
    content: '';
    position: absolute;
    left: 15px;
    right: 15px;
    bottom: 24px;
    height: 2px;
    background: var(--blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s var(--ease);
}
.nav > ul > li:hover > a,
.nav > ul > li.active > a { color: var(--blue); }
.nav > ul > li:hover > a::after,
.nav > ul > li.active > a::after { transform: scaleX(1); }

/* 下拉 */
.drop {
    position: absolute;
    top: 84px;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 168px;
    background: #fff;
    border: 1px solid var(--line);
    border-top: 2px solid var(--blue);
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius) var(--radius);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: all .25s var(--ease);
}
.nav > ul > li:hover .drop { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.drop a {
    display: block;
    padding: 9px 20px;
    font-size: 14px;
    color: var(--body);
    white-space: nowrap;
}
.drop a:hover { background: var(--bg-soft); color: var(--blue); padding-left: 24px; }

/* 搜索 */
.search {
    display: flex;
    align-items: center;
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: 40px;
    padding: 0 4px 0 16px;
    height: 40px;
    width: 190px;
    flex-shrink: 0;
    transition: all .25s var(--ease);
}
.search:focus-within { border-color: var(--blue); background: #fff; box-shadow: 0 0 0 3px rgba(2, 55, 147, .08); }
.search input {
    border: 0;
    background: none;
    outline: none;
    width: 100%;
    font-size: 13.5px;
    color: var(--ink);
}
.search input::placeholder { color: var(--muted); }
.search button {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: var(--steel);
    transition: all .2s;
}
.search button:hover { background: var(--blue); color: #fff; }

.menu-btn { display: none; width: 40px; height: 40px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.menu-btn span { display: block; width: 22px; height: 2px; background: var(--ink); transition: .3s var(--ease); }
/* 展开时变成叉号 */
.menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn.active span:nth-child(2) { opacity: 0; }
.menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏轮播 ---------- */
.hero { position: relative; background: var(--navy); }
.hero-slider { position: relative; height: 600px; }
.hero-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity .9s var(--ease);
    display: flex;
    align-items: center;
}
.hero-slide.active { opacity: 1; z-index: 1; }
.hero-mask {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(6, 22, 40, .92) 0%, rgba(6, 22, 40, .72) 42%, rgba(6, 22, 40, .12) 78%);
}
.hero-content { position: relative; z-index: 2; max-width: 640px; }
.hero-content h1 {
    font-size: 46px;
    color: #fff;
    letter-spacing: 1px;
    margin-bottom: 18px;
    line-height: 1.28;
    text-shadow: 0 2px 20px rgba(0, 0, 0, .3);
}
.hero-content p {
    font-size: 17px;
    color: rgba(255, 255, 255, .84);
    margin-bottom: 32px;
    max-width: 520px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-dots {
    position: absolute;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 5;
}
.hero-dots button {
    width: 30px;
    height: 3px;
    background: rgba(255, 255, 255, .4);
    border-radius: 2px;
    transition: all .3s var(--ease);
}
.hero-dots button.active { background: #fff; width: 46px; }

/* 移动端专用按钮条，桌面端默认隐藏 */
.hero-actions-m { display: none; }

.hero-fallback {
    background: linear-gradient(120deg, #0a2540, #134a86);
    padding: 110px 0;
    color: #fff;
}
.hero-fallback h1 { font-size: 42px; color: #fff; margin-bottom: 14px; }
.hero-fallback p { font-size: 17px; color: rgba(255, 255, 255, .8); }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 46px;
    padding: 0 28px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all .25s var(--ease);
    border: 1px solid transparent;
    white-space: nowrap;
}
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 4px 14px rgba(2, 55, 147, .28); }
.btn-primary:hover { background: var(--blue-light); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 22px rgba(2, 55, 147, .34); }
.btn-outline { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-outline:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-soft); }
.btn-ghost { border-color: rgba(255, 255, 255, .4); color: #fff; background: rgba(255, 255, 255, .06); }
.btn-ghost:hover { background: rgba(255, 255, 255, .16); color: #fff; border-color: rgba(255, 255, 255, .7); }
.btn-light { background: #fff; color: var(--navy); }
.btn-light:hover { background: rgba(255, 255, 255, .9); color: var(--blue); }
.btn-text { color: var(--blue); padding: 0; height: auto; }
.btn-text:hover { gap: 12px; }
.btn-block { width: 100%; height: 44px; }

/* ---------- 服务特色条 ---------- */
.features { background: #fff; border-bottom: 1px solid var(--line); }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.feat {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 34px 26px;
    border-right: 1px solid var(--line);
    transition: background .3s var(--ease);
}
.feat:last-child { border-right: 0; }
.feat:hover { background: var(--bg-soft); }
.feat-icon {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--blue-soft);
    color: var(--blue);
    display: grid;
    place-items: center;
    transition: all .3s var(--ease);
}
.feat:hover .feat-icon { background: var(--blue); color: #fff; transform: scale(1.06); }
.feat h3 { font-size: 16px; margin-bottom: 4px; }
.feat p { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ---------- 通用段落 ---------- */
.section { padding: 88px 0; }
.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    margin-bottom: 48px;
}
.section-head.center { flex-direction: column; align-items: center; text-align: center; }
.section-title .eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2.5px;
    color: var(--blue);
    margin-bottom: 12px;
    position: relative;
    padding-left: 30px;
}
.section-title .eyebrow::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 22px;
    height: 1px;
    background: var(--blue);
}
.section-head.center .section-title .eyebrow { padding-left: 0; }
.section-head.center .section-title .eyebrow::before { display: none; }
.section-title .eyebrow.light { color: #7fb0ff; }
.section-title h2 { font-size: 34px; letter-spacing: -.3px; margin-bottom: 12px; }
.section-title p { color: var(--steel); font-size: 15.5px; max-width: 640px; }
.section-head.center .section-title p { margin: 0 auto; }
.more-link { font-size: 14.5px; color: var(--steel); white-space: nowrap; padding-bottom: 4px; }
.more-link:hover { color: var(--blue); }

/* ---------- 产品 Tab ---------- */
.tab-nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--line);
    margin-bottom: 36px;
}
.tab-btn {
    padding: 12px 22px;
    font-size: 15px;
    font-weight: 500;
    color: var(--steel);
    position: relative;
    transition: color .2s;
    border-radius: var(--radius) var(--radius) 0 0;
}
.tab-btn::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 2px;
    background: var(--blue);
    transform: scaleX(0);
    transition: transform .3s var(--ease);
}
.tab-btn:hover { color: var(--blue); background: var(--bg-soft); }
.tab-btn.active { color: var(--blue); font-weight: 600; }
.tab-btn.active::after { transform: scaleX(1); }

.tab-panel { display: none; animation: fadeUp .4s var(--ease); }
.tab-panel.active { display: block; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.tab-foot { text-align: center; margin-top: 36px; }

/* ---------- 产品卡片 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.prod-grid-lg { grid-template-columns: repeat(3, 1fr); gap: 24px; }

.prod-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    overflow: hidden;
    padding: 20px 20px 22px;
    position: relative;
    transition: all .32s var(--ease);
    display: block;
}
.prod-card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}
.prod-thumb {
    aspect-ratio: 1 / 1;
    background: var(--bg-soft);
    border-radius: var(--radius);
    overflow: hidden;
    display: grid;
    place-items: center;
    margin-bottom: 16px;
}
.prod-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 12px;
    transition: transform .45s var(--ease);
}
.prod-card:hover .prod-thumb img { transform: scale(1.07); }
.prod-card h3 {
    font-size: 15px;
    font-weight: 500;
    line-height: 1.5;
    color: var(--ink);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 45px;
}
.prod-sum { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.prod-arrow {
    position: absolute;
    right: 20px;
    bottom: 18px;
    font-size: 15px;
    color: var(--blue);
    opacity: 0;
    transform: translateX(-8px);
    transition: all .3s var(--ease);
}
.prod-card:hover .prod-arrow { opacity: 1; transform: none; }

/* ---------- 关于我们 ---------- */
.about-section { background: var(--bg-soft); }
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 72px;
    align-items: center;
}
.about-visual { position: relative; }
.about-img-main {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: #fff;
    aspect-ratio: 4 / 3;
    display: grid;
    place-items: center;
}
.about-img-main img { width: 100%; height: 100%; object-fit: cover; }
.about-badge {
    position: absolute;
    right: -22px;
    bottom: -22px;
    background: var(--blue);
    color: #fff;
    padding: 22px 26px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 14px 34px rgba(2, 55, 147, .34);
}
.about-badge strong { display: block; font-size: 36px; line-height: 1; font-weight: 700; }
.about-badge strong small { font-size: 15px; font-weight: 500; margin-left: 3px; }
.about-badge span { font-size: 12.5px; opacity: .85; display: block; margin-top: 8px; letter-spacing: .5px; }

.about-text .eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2.5px;
    color: var(--blue);
    margin-bottom: 14px;
}
.about-text h2 { font-size: 34px; line-height: 1.4; margin-bottom: 20px; letter-spacing: -.3px; }
.about-desc { font-size: 15.5px; line-height: 1.9; color: var(--body); margin-bottom: 26px; }
.about-points { display: flex; flex-direction: column; gap: 12px; margin-bottom: 32px; }
.about-points li {
    font-size: 14.5px;
    color: var(--body);
    padding-left: 26px;
    position: relative;
}
.about-points li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 14px;
    height: 8px;
    border-left: 2px solid var(--blue);
    border-bottom: 2px solid var(--blue);
    transform: rotate(-45deg);
}
.about-points b { color: var(--ink); margin-right: 4px; }
.about-actions { display: flex; align-items: center; gap: 24px; }

/* ---------- 价值观 ---------- */
.values-section {
    background: linear-gradient(135deg, #0a2540 0%, #0e3560 55%, #123f74 100%);
    position: relative;
    overflow: hidden;
}
.values-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, .06) 1px, transparent 0);
    background-size: 26px 26px;
}
.values-section .wrap { position: relative; z-index: 1; }
.values-section .section-title h2 { color: #fff; }
.values-section .section-title p { color: rgba(255, 255, 255, .68); }
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card {
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    transition: all .35s var(--ease);
    backdrop-filter: blur(4px);
}
.value-card:hover {
    background: rgba(255, 255, 255, .09);
    border-color: rgba(127, 176, 255, .4);
    transform: translateY(-4px);
}
.value-num {
    display: block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #7fb0ff;
    margin-bottom: 18px;
}
.value-card h3 { font-size: 19px; color: #fff; margin-bottom: 14px; }
.value-card p { font-size: 14.5px; color: rgba(255, 255, 255, .72); line-height: 1.85; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.news-card {
    display: flex;
    gap: 22px;
    padding: 26px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    transition: all .3s var(--ease);
}
.news-card:hover { border-color: transparent; box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.news-date {
    flex-shrink: 0;
    width: 68px;
    text-align: center;
    padding-right: 22px;
    border-right: 1px solid var(--line);
}
.news-date strong { display: block; font-size: 30px; line-height: 1.1; color: var(--blue); font-weight: 700; }
.news-date span { font-size: 12px; color: var(--muted); }
.news-body h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.55;
}
.news-body p {
    font-size: 13.5px;
    color: var(--muted);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 12px;
}
.news-more { font-size: 13px; color: var(--blue); font-weight: 500; }

/* ---------- CTA ---------- */
.cta-band {
    background: var(--blue);
    padding: 56px 0;
    position: relative;
    overflow: hidden;
}
.cta-band::after {
    content: '';
    position: absolute;
    right: -80px;
    top: -80px;
    width: 320px;
    height: 320px;
    border: 60px solid rgba(255, 255, 255, .06);
    border-radius: 50%;
}
.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    position: relative;
    z-index: 1;
}
.cta-inner h2 { font-size: 28px; color: #fff; margin-bottom: 8px; }
.cta-inner p { color: rgba(255, 255, 255, .78); font-size: 15px; }
.cta-actions { display: flex; gap: 14px; flex-shrink: 0; }

/* ---------- 页头 Banner ---------- */
.page-hero {
    background: linear-gradient(120deg, #0a2540 0%, #10365f 100%);
    padding: 64px 0 52px;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, .05) 1px, transparent 0);
    background-size: 28px 28px;
}
.page-hero .wrap { position: relative; z-index: 1; }
.page-hero h1 { font-size: 32px; color: #fff; margin-bottom: 10px; }
.page-hero p { font-size: 15px; color: rgba(255, 255, 255, .72); max-width: 720px; }
.page-hero-sm { padding: 28px 0; }
.crumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255, 255, 255, .6); margin-top: 16px; flex-wrap: wrap; }
.page-hero-sm .crumb { margin-top: 0; }
.crumb a { color: rgba(255, 255, 255, .72); }
.crumb a:hover { color: #fff; }
.crumb .cur { color: #fff; }

/* ---------- 侧栏 + 主内容 ---------- */
.side-layout, .page-layout, .msg-layout {
    display: grid;
    grid-template-columns: 248px 1fr;
    gap: 40px;
    align-items: start;
}
.page-layout { grid-template-columns: 224px 1fr; }

.side { position: sticky; top: 108px; display: flex; flex-direction: column; gap: 20px; }
.side-block {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.side-title {
    font-size: 15px;
    font-weight: 600;
    padding: 18px 22px;
    background: var(--navy);
    color: #fff;
    margin: 0;
    letter-spacing: .3px;
}
.side-menu li { border-bottom: 1px solid var(--line); }
.side-menu li:last-child { border-bottom: 0; }
.side-menu a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 13px 22px;
    font-size: 14px;
    color: var(--body);
    transition: all .22s var(--ease);
    position: relative;
}
.side-menu a::before {
    content: '';
    width: 0;
    height: 1px;
    background: var(--blue);
    transition: width .25s var(--ease);
}
.side-menu a:hover { background: var(--bg-soft); color: var(--blue); }
.side-menu a:hover::before { width: 12px; }
.side-menu li.active a { background: var(--blue-soft); color: var(--blue); font-weight: 600; }
.side-menu li.active a::before { width: 12px; }

.side-contact { padding: 24px 22px; background: linear-gradient(150deg, #0a2540, #123f74); border: 0; }
.side-contact .side-title {
    background: none;
    padding: 0 0 14px;
    color: rgba(255, 255, 255, .6);
    font-size: 13px;
    letter-spacing: 1px;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    margin-bottom: 16px;
}
.side-tel { font-size: 22px; font-weight: 700; color: #fff; line-height: 1.3; letter-spacing: .5px; }
.side-note { font-size: 12.5px; color: rgba(255, 255, 255, .55); margin: 6px 0 18px; }

.side-qr { padding: 24px 22px; text-align: center; }
.side-qr .side-title { background: none; color: var(--ink); padding: 0 0 16px; font-size: 14px; }
.side-qr img { width: 140px; height: 140px; object-fit: contain; margin: 0 auto 10px; border: 1px solid var(--line); border-radius: var(--radius); padding: 6px; }
.side-qr p { font-size: 12.5px; color: var(--muted); }

/* 子分类 */
.subcats { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.subcats a {
    padding: 8px 18px;
    font-size: 14px;
    border: 1px solid var(--line);
    border-radius: 40px;
    color: var(--body);
    background: #fff;
    transition: all .22s var(--ease);
}
.subcats a:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-soft); }

.list-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 28px;
    font-size: 13.5px;
    color: var(--muted);
}
.list-head b { color: var(--blue); font-size: 16px; }
.kw-tip { color: var(--blue); background: var(--blue-soft); padding: 3px 12px; border-radius: 20px; }

.empty {
    text-align: center;
    padding: 80px 20px;
    color: var(--muted);
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
}
.empty p { font-size: 15px; margin-bottom: 12px; }
.empty-tip { font-size: 13.5px !important; color: var(--muted); }
.empty .btn { margin-top: 16px; }

/* 分页 */
.pager { margin-top: 44px; display: flex; justify-content: center; }
.pager ul, .pager .pagination { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.pager li, .pager a, .pager span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    font-size: 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    color: var(--body);
    background: #fff;
    transition: all .2s;
}
.pager a:hover { border-color: var(--blue); color: var(--blue); }
.pager .active, .pager li.active span, .pager .current, .pager li.active a {
    background: var(--blue);
    border-color: var(--blue);
    color: #fff;
}
.pager .disabled, .pager li.disabled span { color: var(--muted); background: var(--bg-soft); }

/* ---------- 产品详情 ---------- */
.detail-top {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 44px;
    padding-bottom: 44px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 44px;
}
.gallery-main {
    aspect-ratio: 1 / 1;
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
}
.gallery-main img { width: 100%; height: 100%; object-fit: contain; padding: 20px; }
.gallery-thumbs { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.thumb {
    width: 74px;
    height: 74px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-soft);
    padding: 0;
    transition: all .2s;
}
.thumb img { width: 100%; height: 100%; object-fit: contain; padding: 4px; }
.thumb:hover, .thumb.active { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(2, 55, 147, .1); }

.detail-info h1 { font-size: 28px; line-height: 1.4; margin-bottom: 12px; }
.detail-sub { font-size: 15px; color: var(--steel); margin-bottom: 10px; }
.detail-sum {
    font-size: 14.5px;
    color: var(--body);
    line-height: 1.8;
    padding: 14px 18px;
    background: var(--bg-soft);
    border-left: 3px solid var(--blue);
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 26px;
}
.detail-specs { display: flex; flex-direction: column; gap: 1px; background: var(--line); border-radius: var(--radius); overflow: hidden; margin-bottom: 30px; }
.detail-specs > div { display: flex; background: #fff; font-size: 14px; }
.detail-specs dt { width: 110px; flex-shrink: 0; padding: 12px 18px; color: var(--muted); background: var(--bg-soft); }
.detail-specs dd { padding: 12px 18px; color: var(--ink); flex: 1; }
.detail-actions { display: flex; gap: 12px; margin-bottom: 22px; flex-wrap: wrap; }
.detail-trust { display: flex; gap: 22px; padding-top: 20px; border-top: 1px dashed var(--line); }
.detail-trust span {
    font-size: 13px;
    color: var(--steel);
    padding-left: 20px;
    position: relative;
}
.detail-trust span::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 12px;
    height: 7px;
    border-left: 2px solid var(--blue);
    border-bottom: 2px solid var(--blue);
    transform: rotate(-45deg);
}

.body-head { display: flex; align-items: center; gap: 14px; margin-bottom: 26px; }
.body-head h2 { font-size: 21px; position: relative; padding-left: 16px; }
.body-head h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 3px;
    background: var(--blue);
    border-radius: 2px;
}
.related { margin-top: 60px; padding-top: 40px; border-top: 1px solid var(--line); }

/* ---------- 富文本 ---------- */
.rich-text { font-size: 15.5px; line-height: 2; color: var(--body); word-break: break-word; }
.rich-text p { margin-bottom: 18px; }
.rich-text h2, .rich-text h3, .rich-text h4 { margin: 32px 0 16px; }
.rich-text h2 { font-size: 22px; }
.rich-text h3 { font-size: 18px; }
.rich-text img { max-width: 100%; height: auto; border-radius: var(--radius); margin: 20px auto; }
.rich-text ul, .rich-text ol { margin: 16px 0 16px 22px; }
.rich-text ul { list-style: disc; }
.rich-text ol { list-style: decimal; }
.rich-text li { margin-bottom: 8px; }
.rich-text a { color: var(--blue); text-decoration: underline; }
.rich-text table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.rich-text th, .rich-text td { border: 1px solid var(--line); padding: 10px 14px; }
.rich-text th { background: var(--bg-soft); font-weight: 600; color: var(--ink); }
.rich-text blockquote {
    border-left: 3px solid var(--blue);
    background: var(--bg-soft);
    padding: 16px 20px;
    margin: 20px 0;
    color: var(--steel);
}
.rich-text strong, .rich-text b { color: var(--ink); }

/* ---------- 新闻列表 ---------- */
.news-list { display: flex; flex-direction: column; gap: 14px; }
.news-list > li > a {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 24px 26px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    transition: all .3s var(--ease);
}
.news-list > li > a:hover { border-color: transparent; box-shadow: var(--shadow); transform: translateX(4px); }
.news-list-date {
    flex-shrink: 0;
    width: 66px;
    text-align: center;
    padding-right: 24px;
    border-right: 1px solid var(--line);
}
.news-list-date strong { display: block; font-size: 26px; line-height: 1.1; color: var(--blue); }
.news-list-date span { font-size: 12px; color: var(--muted); }
.news-list-body { flex: 1; min-width: 0; }
.news-list-body h3 { font-size: 16px; margin-bottom: 6px; line-height: 1.5; }
.news-list-body p {
    font-size: 13.5px;
    color: var(--muted);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-list-arrow { color: var(--blue); font-size: 16px; opacity: 0; transform: translateX(-6px); transition: all .3s var(--ease); }
.news-list > li > a:hover .news-list-arrow { opacity: 1; transform: none; }

/* ---------- 文章详情 ---------- */
.article { background: #fff; }
.article-head { padding-bottom: 26px; border-bottom: 1px solid var(--line); margin-bottom: 34px; }
.article-head h1 { font-size: 28px; line-height: 1.45; margin-bottom: 16px; }
.article-meta { display: flex; gap: 22px; font-size: 13px; color: var(--muted); flex-wrap: wrap; }
.article-meta span { position: relative; }
.article-meta span + span::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--line);
}
.article-body { margin-bottom: 44px; }
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    padding-top: 30px;
    border-top: 1px solid var(--line);
}
.an-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 20px;
    background: var(--bg-soft);
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: all .25s var(--ease);
    min-width: 0;
}
.an-item:hover { border-color: var(--blue); background: #fff; }
.an-item span { font-size: 12px; color: var(--muted); }
.an-item strong {
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.an-next { text-align: right; }
.an-empty { opacity: .5; pointer-events: none; }

/* ---------- 单页 ---------- */
.page-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 40px 44px;
}
.block-title { font-size: 20px; margin-bottom: 18px; position: relative; padding-left: 16px; }
.block-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 5px;
    width: 3px;
    background: var(--blue);
    border-radius: 2px;
}
.block-title small { font-size: 13px; color: var(--muted); font-weight: 400; margin-left: 8px; }

.contact-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 28px;
}
.cc-item {
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    padding: 24px 26px;
    border-left: 3px solid var(--blue);
}
.cc-item h4 { font-size: 13px; color: var(--muted); font-weight: 500; margin-bottom: 8px; letter-spacing: .5px; }
.cc-item p { font-size: 15.5px; color: var(--ink); line-height: 1.7; font-weight: 500; }
.cc-item p.sm { font-size: 13.5px; color: var(--steel); font-weight: 400; }

.contact-form-wrap { margin-top: 44px; padding-top: 36px; border-top: 1px solid var(--line); }
.contact-form-wrap h3 { font-size: 20px; margin-bottom: 8px; }
.form-tip { font-size: 13.5px; color: var(--muted); margin-bottom: 26px; }
.form-tip em, label em { color: #dc2626; font-style: normal; }

/* ---------- 表单 ---------- */
.msg-form { max-width: 100%; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-item { margin-bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
.form-item label { font-size: 13.5px; color: var(--ink); font-weight: 500; }
.form-item input, .form-item textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-size: 14.5px;
    color: var(--ink);
    background: #fff;
    outline: none;
    transition: all .22s var(--ease);
    resize: vertical;
}
.form-item input::placeholder, .form-item textarea::placeholder { color: #b6c2d1; }
.form-item input:focus, .form-item textarea:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(2, 55, 147, .08);
}
.form-item input.error, .form-item textarea.error { border-color: #dc2626; }
.captcha-row { display: flex; gap: 12px; align-items: center; }
.captcha-row input { flex: 1; }
.captcha-row img {
    height: 46px;
    width: 120px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    cursor: pointer;
    object-fit: cover;
}
.form-submit { display: flex; align-items: center; gap: 18px; margin-top: 8px; flex-wrap: wrap; }
.form-hint { font-size: 12.5px; color: var(--muted); }
.form-msg { margin-top: 16px; font-size: 14px; min-height: 20px; }
.form-msg.ok { color: #059669; }
.form-msg.err { color: #dc2626; }
.btn[disabled] { opacity: .6; cursor: not-allowed; transform: none !important; }

.msg-side { position: sticky; top: 108px; display: flex; flex-direction: column; gap: 20px; }
.contact-mini { margin-top: 18px; padding-top: 16px; border-top: 1px solid rgba(255, 255, 255, .12); display: flex; flex-direction: column; gap: 10px; }
.contact-mini li { display: flex; gap: 10px; font-size: 13px; color: rgba(255, 255, 255, .72); line-height: 1.6; }
.contact-mini i { color: rgba(255, 255, 255, .4); font-style: normal; flex-shrink: 0; width: 32px; }

/* ---------- 搜索 ---------- */
.search-big { display: flex; gap: 12px; max-width: 640px; margin: 0 auto 48px; }
.search-big input {
    flex: 1;
    height: 50px;
    padding: 0 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-size: 15px;
    outline: none;
    transition: all .22s;
}
.search-big input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(2, 55, 147, .08); }
.search-big .btn { height: 50px; }
.search-group { margin-bottom: 56px; }

/* ---------- 404 ---------- */
.notfound { padding: 120px 0; text-align: center; }
.nf-code {
    font-size: 120px;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, var(--blue), #7fb0ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -4px;
    margin-bottom: 24px;
}
.notfound h1 { font-size: 26px; margin-bottom: 12px; }
.notfound p { color: var(--muted); margin-bottom: 32px; }
.nf-actions { display: flex; gap: 14px; justify-content: center; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy); color: rgba(255, 255, 255, .62); }
.footer-main { padding: 68px 0 48px; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.4fr auto;
    gap: 44px;
    align-items: start;
}
.footer-logo { height: 40px; width: auto; margin-bottom: 16px; filter: brightness(0) invert(1); opacity: .9; }
.footer-slogan { font-size: 13px; line-height: 1.8; color: rgba(255, 255, 255, .5); margin-bottom: 22px; max-width: 300px; }
.footer-tel span { display: block; font-size: 12px; color: rgba(255, 255, 255, .45); letter-spacing: .5px; }
.footer-tel strong { font-size: 24px; color: #fff; letter-spacing: .5px; font-weight: 700; }

.footer-col h4 {
    font-size: 14px;
    color: #fff;
    margin-bottom: 20px;
    font-weight: 600;
    letter-spacing: .5px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a { font-size: 13px; color: rgba(255, 255, 255, .6); }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; font-size: 13px; line-height: 1.7; margin-bottom: 11px; }
.footer-contact li i {
    font-style: normal;
    flex-shrink: 0;
    width: 30px;
    color: rgba(255, 255, 255, .35);
}
.footer-contact li span { color: rgba(255, 255, 255, .6); }
.footer-qr { text-align: center; }
.footer-qr img {
    width: 106px;
    height: 106px;
    object-fit: contain;
    background: #fff;
    border-radius: var(--radius);
    padding: 5px;
    margin: 0 auto 10px;
}
.footer-qr p { font-size: 12px; color: rgba(255, 255, 255, .45); }

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding: 22px 0;
    font-size: 12.5px;
    color: rgba(255, 255, 255, .4);
}
.footer-bottom .wrap { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.footer-bottom a { color: rgba(255, 255, 255, .5); }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .sep { color: rgba(255, 255, 255, .2); }

/* ---------- 浮动工具条 ---------- */
.float-bar {
    position: fixed;
    right: 20px;
    bottom: 90px;
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all .3s var(--ease);
}
.float-bar.show { opacity: 1; visibility: visible; transform: none; }
.fb-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    width: 56px;
    height: 56px;
    background: #fff;
    color: var(--steel);
    font-size: 11px;
    transition: all .22s var(--ease);
}
.fb-item:hover { background: var(--blue); color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
    .prod-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; }
    .footer-qr { display: none; }
    .search { width: 150px; }
    .nav > ul > li > a { padding: 0 11px; font-size: 14.5px; }
}

@media (max-width: 1024px) {
    .hero-slider { height: 480px; }
    .hero-content h1 { font-size: 36px; }
    .section { padding: 68px 0; }
    .section-title h2 { font-size: 28px; }
    .about-grid { gap: 44px; }
    .about-text h2 { font-size: 28px; }
    .side-layout, .page-layout, .msg-layout { grid-template-columns: 1fr; }
    .side { position: static; flex-direction: row; flex-wrap: wrap; }
    .side-block { flex: 1; min-width: 240px; }
    .values-grid { grid-template-columns: 1fr; gap: 16px; }
    .detail-top { grid-template-columns: 1fr; gap: 28px; }
    .detail-info h1 { font-size: 24px; }
}

@media (max-width: 900px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .feat:nth-child(2) { border-right: 0; }
    .feat:nth-child(1), .feat:nth-child(2) { border-bottom: 1px solid var(--line); }
    .prod-grid { grid-template-columns: repeat(2, 1fr); }
    .prod-grid-lg { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .about-badge { right: 16px; bottom: -18px; }
    .cta-inner { flex-direction: column; align-items: flex-start; gap: 24px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    body { font-size: 14.5px; }
    .wrap { padding: 0 16px; }
    .topbar .wrap { height: 32px; font-size: 12px; }
    .topbar-l { display: none; }
    .topbar .wrap { justify-content: center; }

    .header-inner { height: 62px; gap: 12px; }
    .logo img { height: 34px; }
    .logo-text { display: none; }
    .search { display: none; }
    .menu-btn { display: flex; margin-left: auto; }

    /* 头部作为定位参照：菜单紧贴头部下沿，不依赖固定像素值。
       这样热线条滚走、头部吸附顶部时，菜单也不会与头部之间露出空隙。 */
    .header { position: sticky; }

    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        max-height: calc(100vh - 62px);
        background: #fff;
        border-top: 1px solid var(--line);
        padding: 8px 0 40px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        transform: translateX(-100%);
        transition: transform .32s var(--ease);
        margin-left: 0;
        z-index: 99;
        visibility: hidden;
    }
    .nav.open { transform: none; visibility: visible; }
    .nav > ul { flex-direction: column; align-items: stretch; gap: 0; }
    .nav > ul > li > a {
        height: auto;
        line-height: 1.5;
        padding: 15px 24px;
        font-size: 15.5px;
        border-bottom: 1px solid var(--line);
    }
    .nav > ul > li > a::after { display: none; }
    .drop {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border: 0;
        border-top: 0;
        background: var(--bg-soft);
        padding: 4px 0;
        min-width: 0;
    }
    .drop a { padding: 11px 40px; font-size: 14px; }

    /* ---------------------------------------------------------------
       首屏（手机竖屏）
       轮播图是 1920×960 的横版海报，图上自带标题与卖点文字。
       若在竖屏里用 cover 裁切，会把海报文字裁掉一半、并与叠加的
       HTML 文字重叠。因此这里：
       1) 隐藏叠加的文字层，只保留海报本身的图面
       2) 用 contain 完整显示整张海报，上下以同色渐变补齐
       3) 操作按钮单独放在海报下方，避免遮挡图面
       --------------------------------------------------------------- */
    .hero-slider {
        height: auto;
        aspect-ratio: 2 / 1;      /* 与海报 1920×960 同比，保证完整显示 */
        max-height: 56vh;
    }
    .hero-slide {
        background-size: contain;
        background-repeat: no-repeat;
        background-position: center;
        background-color: #dce9f7;  /* 与海报浅蓝底色接近，消除突兀留白 */
        align-items: flex-end;
        justify-content: center;
        padding-bottom: 12px;
    }
    /* 海报自带文字，去掉叠加遮罩与文字，避免重复与遮挡 */
    .hero-mask { display: none; }
    .hero-content { display: none; }

    /* 轮播指示点放到图片内部下沿 */
    /* 移动端首屏整体改为浅色，避免深色块透出 */
    .hero { background: #dce9f7; }
    .hero-slider { background: #dce9f7; }

    /* 海报下方按钮条 */
    .hero-actions-m {
        display: flex;
        gap: 10px;
        padding: 16px 16px 22px;
        background: #dce9f7;
    }
    .hero-actions-m .btn { flex: 1; height: 44px; font-size: 14.5px; }
    .hero-actions-m .btn-outline { background: #fff; border-color: #b9d2ee; }

    /* 指示点：落在海报内下沿 */
    .hero-dots { bottom: 10px; gap: 8px; }
    .hero-dots button { width: 22px; height: 3px; background: rgba(2, 55, 147, .25); }
    .hero-dots button.active { background: var(--blue); width: 34px; }

    .section { padding: 48px 0; }
    .section-head { flex-direction: column; align-items: flex-start; gap: 16px; margin-bottom: 28px; }
    .section-title h2 { font-size: 23px; }
    .section-title p { font-size: 14px; }

    .features-grid { grid-template-columns: 1fr; }
    .feat { border-right: 0; border-bottom: 1px solid var(--line); padding: 20px 4px; }
    .feat:last-child { border-bottom: 0; }
    .feat-icon { width: 44px; height: 44px; }

    .tab-nav { gap: 2px; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; -webkit-overflow-scrolling: touch; }
    .tab-btn { padding: 10px 14px; font-size: 14px; white-space: nowrap; }

    .prod-grid { gap: 12px; }
    .prod-grid-lg { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .prod-card { padding: 12px 12px 16px; border-radius: var(--radius); }
    .prod-thumb { margin-bottom: 10px; }
    .prod-card h3 { font-size: 13.5px; min-height: 40px; }
    .prod-arrow { display: none; }

    .about-badge { padding: 16px 18px; }
    .about-badge strong { font-size: 28px; }
    .about-text h2 { font-size: 23px; }
    .about-actions { flex-wrap: wrap; gap: 16px; }

    .value-card { padding: 26px 22px; }
    .value-card h3 { font-size: 17px; }

    .news-card { padding: 18px; gap: 16px; }
    .news-date { width: 54px; padding-right: 16px; }
    .news-date strong { font-size: 24px; }

    .cta-band { padding: 40px 0; }
    .cta-inner h2 { font-size: 21px; }
    .cta-actions { width: 100%; }
    .cta-actions .btn { flex: 1; }

    .page-hero { padding: 36px 0 32px; }
    .page-hero h1 { font-size: 24px; }

    /* ---------------- 手机端侧栏：折叠为横向标签条 ----------------
       原来侧栏分类全部纵向铺开，占满整屏，产品列表被挤到很下面。
       这里改为：分类做成可横向滑动的标签，联系模块精简后置于底部。 */
    /* 关键：grid 子项默认 min-width:auto，
       内部横向滚动条会把列撑宽导致整页横向溢出。
       必须显式 min-width:0 才能让 overflow 正常生效。 */
    .side-layout, .page-layout, .msg-layout {
        grid-template-columns: minmax(0, 1fr);
    }
    .side, .main-col {
        min-width: 0;
        max-width: 100%;
        overflow: hidden;
    }
    .side {
        position: static;
        flex-direction: column;
        gap: 0;
        margin-bottom: 8px;
        width: 100%;
    }
    .side > * { min-width: 0; max-width: 100%; }

    /* 分类块：去掉卡片外壳，变成横向滚动标签 */
    .side-block {
        min-width: 0;
        border: 0;
        background: transparent;
        overflow: visible;
    }
    .side-block .side-title { display: none; }

    /* 单页/新闻页有多个导航块，手机端只保留第一个，避免标签刷屏 */
    .side > .side-block:not(.side-contact) ~ .side-block:not(.side-contact) {
        display: none;
    }

    .side-menu {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 4px 0 12px;
        margin: 0;
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }
    .side-menu::-webkit-scrollbar { display: none; }
    .side-menu li {
        border: 0;
        flex-shrink: 0;
    }
    .side-menu a {
        padding: 8px 16px;
        font-size: 13.5px;
        border: 1px solid var(--line);
        border-radius: 40px;
        background: #fff;
        white-space: nowrap;
    }
    .side-menu a::before { display: none; }
    .side-menu li.active a {
        background: var(--blue);
        border-color: var(--blue);
        color: #fff;
        font-weight: 500;
    }

    /* 联系模块：手机端精简，隐藏大二维码块 */
    /* 联系卡片：做成独立的深色电话条，与分类标签区分 */
    .side-contact {
        border-radius: 10px;
        margin: 4px 0 20px;
        padding: 14px 16px;
        display: flex;
        align-items: center;
        gap: 12px;
        background: linear-gradient(135deg, #0a2540, #123f74);
        border: 0;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box;
        overflow: hidden;
    }
    .side-contact .side-title,
    .side-contact .side-note,
    .side-contact .side-menu { display: none; }
    .side-contact .side-tel {
        font-size: 18px;
        margin: 0;
        color: #fff;
        letter-spacing: .3px;
        white-space: nowrap;
    }
    .side-contact .btn {
        width: auto !important;
        height: 36px;
        margin-left: auto;
        padding: 0 18px;
        font-size: 13px;
        flex-shrink: 0;
    }
    .side-qr { display: none; }

    /* 子分类与侧栏分类内容重复，手机端统一用侧栏那一条，隐藏这里 */
    .subcats.pc-only { display: none !important; }
    .page-card { padding: 24px 20px; }
    .contact-cards { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; gap: 0; }

    /* 详情页主图：限制高度，避免占满整屏 */
    .detail-top { gap: 20px; }
    .gallery-main {
        aspect-ratio: auto;
        height: 300px;
        max-height: 42vh;
    }
    .gallery-main img { padding: 12px; }
    .gallery-thumbs { gap: 8px; }
    .thumb { width: 60px; height: 60px; }

    .detail-info h1 { font-size: 21px; }
    .detail-specs dt { width: 88px; padding: 10px 14px; font-size: 13px; }
    .detail-specs dd { padding: 10px 14px; font-size: 13.5px; }
    .detail-actions .btn { flex: 1; }
    .detail-trust { gap: 14px; flex-wrap: wrap; }

    .article-head h1 { font-size: 21px; }
    .article-nav { grid-template-columns: 1fr; }

    .news-list > li > a { padding: 16px; gap: 16px; }
    .news-list-date {
        width: 58px;
        padding-right: 14px;
        white-space: nowrap;
        flex-shrink: 0;
    }
    .news-list-date span { white-space: nowrap; font-size: 11.5px; }
    .news-list-body h3 { font-size: 14.5px; }
    .news-list-body p { -webkit-line-clamp: 2; }
    .news-list-arrow { display: none; }

    .footer-main { padding: 44px 0 32px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { font-size: 11.5px; padding: 18px 0; }

    .float-bar { right: 12px; bottom: 76px; }
    .fb-item { width: 46px; height: 46px; font-size: 10px; }
    .fb-item svg { width: 17px; height: 17px; }

    .nf-code { font-size: 80px; }
    .notfound { padding: 80px 0; }
}

@media (max-width: 400px) {
    .prod-grid-lg { grid-template-columns: 1fr; }
    .cta-actions { flex-direction: column; }
}