/* ============================================================
   深宇启（重庆）科技有限公司 · 门户网站
   css/style.css —— 全站共享样式（深蓝科技风）
   ============================================================ */

/* ---------- 基础变量 ---------- */
:root {
    --c-primary: #1e6fff;        /* 品牌亮蓝 */
    --c-primary-dark: #0b3a8c;   /* 深蓝（横幅/渐变） */
    --c-primary-deep: #0a2f6b;   /* 极深蓝（页脚） */
    --c-accent: #1e6fff;         /* 强调蓝（链接/按钮） */
    --c-cyan: #00b8d9;           /* 青蓝点缀 */
    --c-bg-light: #eaf1ff;       /* 浅蓝分区背景 */
    --c-text: #2b3a55;           /* 正文 */
    --c-text-muted: #6b7a99;     /* 次要文字 */
    --c-border: #dbe7f8;
    --radius: 10px;
    --shadow: 0 6px 24px rgba(30, 111, 255, 0.10);
    --shadow-hover: 0 12px 32px rgba(30, 111, 255, 0.18);
    --font: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- 重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font);
    color: var(--c-text);
    font-size: 15px;
    line-height: 1.75;
    background: #fff;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .25s; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 14px; }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* ============================================================
   顶部信息栏
   ============================================================ */
.topbar {
    background: var(--c-primary-deep);
    color: rgba(255,255,255,.85);
    font-size: 13px;
}
.topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 36px;
    gap: 16px;
    flex-wrap: wrap;
}
.topbar a { color: rgba(255,255,255,.85); }
.topbar a:hover { color: var(--c-cyan); }
.topbar-left span { margin-right: 22px; }
.topbar-right span { margin-left: 0; }
.topbar i { margin-right: 5px; color: var(--c-cyan); }

/* ============================================================
   导航栏
   ============================================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,.97);
    box-shadow: 0 2px 14px rgba(6,31,77,.08);
}
.header.scrolled { box-shadow: 0 4px 18px rgba(6,31,77,.14); }
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: 20px;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo img { height: 44px; width: auto; }
.logo-text { line-height: 1.2; }
.logo-text strong {
    font-size: 20px;
    color: var(--c-primary);
    letter-spacing: 1px;
}
.logo-text span {
    display: block;
    font-size: 11px;
    color: var(--c-text-muted);
    letter-spacing: 2px;
}

.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-list > li { position: relative; }
.nav-list > li > a {
    display: block;
    padding: 10px 14px;
    font-size: 15px;
    font-weight: 600;
    color: var(--c-text);
    border-radius: 6px;
}
.nav-list > li > a:hover,
.nav-list > li.active > a { color: var(--c-accent); background: #eef4ff; }

/* 下拉菜单 */
.dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    min-width: 200px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 12px 30px rgba(6,31,77,.16);
    border: 1px solid var(--c-border);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all .25s ease;
}
.nav-list > li:hover .dropdown,
.nav-list > li:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
    display: block;
    padding: 9px 18px;
    font-size: 14px;
    color: var(--c-text);
}
.dropdown a:hover { background: #eef4ff; color: var(--c-accent); }

.nav-cta { margin-left: 10px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--c-primary); border-radius: 2px; transition: all .3s; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   按钮
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    transition: all .25s;
}
.btn-primary {
    background: linear-gradient(135deg, #3f8cff, #1a63e8);
    color: #fff;
    box-shadow: 0 6px 18px rgba(30,111,255,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(30,111,255,.45); }
.btn-outline {
    border: 1.5px solid rgba(255,255,255,.8);
    color: #fff;
}
.btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; }
.btn-blue-outline {
    border: 1.5px solid var(--c-accent);
    color: var(--c-accent);
}
.btn-blue-outline:hover { background: var(--c-accent); color: #fff; }
.btn-white { background: #fff; color: var(--c-primary); box-shadow: 0 6px 18px rgba(0,0,0,.15); }
.btn-white:hover { transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ============================================================
   Hero 首页轮播
   ============================================================ */
.hero {
    position: relative;
    min-height: 640px;
    padding-bottom: 64px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--c-primary-deep), var(--c-primary));
}
.hero-slides { height: 100%; }
.hero-slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity .8s ease;
}
.hero-slide.active { opacity: 1; visibility: visible; z-index: 2; }
.hero-slide::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(700px 420px at 85% 20%, rgba(0,184,217,.18), transparent 60%),
        radial-gradient(600px 380px at 15% 85%, rgba(79,140,255,.30), transparent 60%);
    z-index: 1;
}
.hero-slide .container { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.hero-text { max-width: 640px; }
.hero-visual { flex-shrink: 0; }
.hero-visual img { max-height: 320px; max-width: 420px; object-fit: contain; filter: drop-shadow(0 26px 44px rgba(0,0,0,.38)); animation: float 5s ease-in-out infinite; }
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-14px); }
}

.hero-eyebrow {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--c-cyan);
    border: 1px solid rgba(0,184,217,.5);
    padding: 5px 16px;
    border-radius: 50px;
    margin-bottom: 22px;
    background: rgba(0,184,217,.1);
}
.hero-title {
    font-size: 46px;
    line-height: 1.3;
    color: #fff;
    font-weight: 800;
    max-width: 700px;
}
.hero-title .grad {
    background: linear-gradient(90deg, #66d8ff, #a6c2ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-sub {
    margin-top: 18px;
    max-width: 620px;
    font-size: 17px;
    color: rgba(255,255,255,.85);
}
.hero-cta { margin-top: 34px; display: flex; gap: 16px; flex-wrap: wrap; }

.hero-dots {
    position: absolute;
    bottom: 84px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 10px;
    z-index: 5;
}
.hero-dots button {
    width: 12px; height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,.35);
    transition: all .3s;
}
.hero-dots button.active { width: 34px; border-radius: 8px; background: var(--c-cyan); }

/* 首页数据条 */
.hero-stats {
    margin-top: 44px;
    display: flex;
    gap: 42px;
    flex-wrap: wrap;
}
.hero-stats .stat b {
    display: block;
    font-size: 34px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
}
.hero-stats .stat b em { font-style: normal; color: var(--c-cyan); font-size: 20px; margin-left: 2px; }
.hero-stats .stat span { font-size: 13px; color: rgba(255,255,255,.72); letter-spacing: 1px; }
.hero-stats .stat + .stat { border-left: 1px solid rgba(255,255,255,.18); padding-left: 42px; }

/* 首页数据条（白底卡片版）：覆盖为深色文字，避免白底白字 */
.home-stats { justify-content: space-between; gap: 16px; }
.home-stats .stat b { color: var(--c-primary); font-size: 30px; }
.home-stats .stat b em { color: var(--c-accent); font-size: 18px; }
.home-stats .stat span { color: var(--c-text-muted); }
.home-stats .stat + .stat { border-left: 1px solid var(--c-border); padding-left: 40px; }

/* ============================================================
   内页横幅
   ============================================================ */
.page-banner {
    background: linear-gradient(135deg, var(--c-primary-deep), var(--c-primary));
    padding: 88px 0 76px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.page-banner::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(500px 300px at 90% 0%, rgba(0,184,217,.16), transparent 60%),
        radial-gradient(420px 280px at 8% 100%, rgba(79,140,255,.26), transparent 60%);
    pointer-events: none;
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { font-size: 38px; font-weight: 800; letter-spacing: 2px; }
.page-banner .crumb { margin-top: 14px; font-size: 14px; color: rgba(255,255,255,.75); }
.page-banner .crumb a { color: var(--c-cyan); }
.page-banner .crumb i { margin: 0 8px; font-size: 11px; }

/* ============================================================
   通用区块
   ============================================================ */
.section { padding: 84px 0; }
.section-light { background: var(--c-bg-light); }
.section-dark { background: linear-gradient(135deg, var(--c-primary-deep), var(--c-primary)); color: #fff; }
.section-blue { background: linear-gradient(120deg, #0b3a8c, #1e6fff); color: #fff; }

.section-header { text-align: center; margin-bottom: 52px; }
.section-header .tag {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--c-accent);
    background: #eaf1ff;
    padding: 5px 16px;
    border-radius: 50px;
    margin-bottom: 14px;
    font-weight: 600;
}
.section-dark .section-header .tag,
.section-blue .section-header .tag { background: rgba(255,255,255,.12); color: var(--c-cyan); }
.section-title { font-size: 32px; font-weight: 800; color: var(--c-primary); }
.section-dark .section-title,
.section-blue .section-title { color: #fff; }
.section-subtitle { margin-top: 10px; color: var(--c-text-muted); font-size: 15px; }
.section-dark .section-subtitle,
.section-blue .section-subtitle { color: rgba(255,255,255,.78); }

/* ============================================================
   卡片通用
   ============================================================ */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform .3s, box-shadow .3s;
    overflow: hidden;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }

/* ---------- 业务卡片 ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.biz-card { padding: 36px 26px; text-align: center; position: relative; }
.biz-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--c-accent), var(--c-cyan));
    transform: scaleX(0);
    transition: transform .35s;
    transform-origin: left;
}
.biz-card:hover::before { transform: scaleX(1); }
.biz-icon {
    width: 74px; height: 74px;
    margin: 0 auto 20px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: #fff;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary-dark));
    box-shadow: 0 8px 20px rgba(30,111,255,.3);
}
.biz-card h3 { font-size: 18px; margin-bottom: 10px; color: var(--c-primary); }
.biz-card p { font-size: 13.5px; color: var(--c-text-muted); }
.biz-card .more {
    display: inline-block;
    margin-top: 16px;
    font-size: 13px;
    color: var(--c-accent);
    font-weight: 600;
}
.biz-card .more i { transition: transform .3s; }
.biz-card .more:hover i { transform: translateX(4px); }

/* ---------- 产品卡片 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.prod-card { padding-bottom: 26px; }
.prod-card .prod-img {
    height: 230px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, #f0f6ff, #e8f1ff);
    padding: 24px;
    position: relative;
}
.prod-card .prod-img img { max-height: 180px; object-fit: contain; }
.prod-card .prod-tag {
    position: absolute;
    top: 14px; left: 14px;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary-dark));
    color: #fff;
    font-size: 12px;
    padding: 3px 12px;
    border-radius: 50px;
}
.prod-card .prod-body { padding: 22px 24px 6px; }
.prod-card h3 { font-size: 17px; color: var(--c-primary); margin-bottom: 8px; }
.prod-card p { font-size: 13.5px; color: var(--c-text-muted); }
.prod-card .prod-body .more {
    display: inline-block;
    margin-top: 14px;
    font-size: 13px;
    color: var(--c-accent);
    font-weight: 600;
}

/* ---------- 案例卡片 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card { padding: 34px 30px; position: relative; }
.case-tag {
    display: inline-block;
    font-size: 12px;
    color: var(--c-accent);
    background: #eaf1ff;
    padding: 3px 14px;
    border-radius: 50px;
    margin-bottom: 14px;
    font-weight: 600;
}
.case-card h3 { font-size: 20px; color: var(--c-primary); margin-bottom: 6px; }
.case-card .case-loc { font-size: 13px; color: var(--c-text-muted); margin-bottom: 14px; }
.case-card .case-loc i { margin-right: 5px; color: var(--c-cyan); }
.case-card p { font-size: 14px; color: var(--c-text); }
.case-data {
    display: flex;
    gap: 28px;
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px dashed var(--c-border);
    flex-wrap: wrap;
}
.case-data b { display: block; font-size: 24px; color: var(--c-accent); line-height: 1.2; }
.case-data span { font-size: 12.5px; color: var(--c-text-muted); }

/* ---------- 新闻卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { padding: 26px 26px 22px; display: flex; flex-direction: column; }
.news-card .news-date {
    font-size: 12.5px;
    color: var(--c-accent);
    background: #eaf1ff;
    display: inline-block;
    padding: 3px 12px;
    border-radius: 50px;
    align-self: flex-start;
    margin-bottom: 14px;
}
.news-card h3 { font-size: 16px; color: var(--c-text); line-height: 1.55; margin-bottom: 10px; flex: 1; }
.news-card p { font-size: 13px; color: var(--c-text-muted); }
.news-card .more { margin-top: 14px; font-size: 13px; color: var(--c-accent); font-weight: 600; }
.news-card h3 a:hover { color: var(--c-accent); }

/* ---------- 新闻筛选 / 分页 / 详情 ---------- */
.news-filter { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 34px; }
.filter-btn { padding: 8px 22px; border-radius: 50px; font-size: 14px; font-weight: 600; color: var(--c-text-muted); border: 1.5px solid var(--c-border); background: #fff; transition: all .25s; }
.filter-btn:hover { border-color: var(--c-accent); color: var(--c-accent); }
.filter-btn.active { background: linear-gradient(135deg, var(--c-accent), var(--c-primary-dark)); color: #fff; border-color: transparent; }
.news-pager { display: flex; justify-content: center; gap: 8px; margin-top: 44px; flex-wrap: wrap; }
.pager-btn { min-width: 40px; height: 40px; padding: 0 12px; border-radius: 8px; border: 1.5px solid var(--c-border); background: #fff; color: var(--c-text); font-weight: 600; font-size: 14px; transition: all .25s; display: inline-flex; align-items: center; justify-content: center; }
.pager-btn.active { background: var(--c-accent); color: #fff; border-color: transparent; }
.pager-btn:disabled { opacity: .4; cursor: not-allowed; }
.pager-btn:not(:disabled):hover { border-color: var(--c-accent); color: var(--c-accent); }

.news-detail { max-width: 860px; margin: 0 auto; padding: 40px 38px; }
.news-detail .back { display: inline-block; margin-bottom: 22px; color: var(--c-accent); font-weight: 600; font-size: 14px; }
.news-detail .back:hover { padding-left: 4px; }
.news-detail h2 { font-size: 26px; color: var(--c-primary); line-height: 1.5; }
.news-detail .meta { margin: 14px 0 26px; font-size: 14px; color: var(--c-text-muted); }
.news-detail .meta .chip { background: #eaf1ff; color: var(--c-accent); padding: 3px 12px; border-radius: 50px; margin-right: 10px; font-size: 12.5px; font-weight: 600; }
.news-body p { margin-bottom: 16px; font-size: 15px; color: var(--c-text); }

/* ---------- 合作模式卡片 ---------- */
.coop-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.coop-card { padding: 38px 30px; text-align: center; }
.coop-card .coop-num {
    font-size: 30px;
    font-weight: 800;
    color: var(--c-cyan);
    opacity: .9;
}
.coop-card h3 { font-size: 19px; color: var(--c-primary); margin: 12px 0 12px; }
.coop-card p { font-size: 13.5px; color: var(--c-text-muted); text-align: left; }

/* ---------- 技术优势 ---------- */
.tech-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.tech-card { padding: 30px 22px; text-align: center; }
.tech-card .tech-icon {
    width: 62px; height: 62px;
    margin: 0 auto 16px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: #fff;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary-dark));
}
.tech-card h3 { font-size: 15.5px; color: var(--c-primary); margin-bottom: 8px; }
.tech-card p { font-size: 12.5px; color: var(--c-text-muted); }

/* ============================================================
   首页「关于」简介条
   ============================================================ */
.intro-grid {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 60px;
    align-items: center;
}
.intro-text h2 { font-size: 30px; color: var(--c-primary); font-weight: 800; line-height: 1.4; }
.intro-text h2 span { color: var(--c-accent); }
.intro-text p { margin-top: 18px; color: var(--c-text-muted); font-size: 14.5px; }
.intro-list { margin-top: 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.intro-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--c-text);
    background: #f0f6ff;
    padding: 12px 16px;
    border-radius: 8px;
}
.intro-list li i { color: var(--c-accent); }
.intro-visual {
    background: linear-gradient(135deg, var(--c-primary-dark), var(--c-accent));
    border-radius: 18px;
    padding: 40px 34px;
    color: #fff;
    box-shadow: 0 20px 40px rgba(11,58,140,.25);
    position: relative;
    overflow: hidden;
}
.intro-visual::before {
    content: "";
    position: absolute;
    width: 260px; height: 260px;
    border-radius: 50%;
    background: rgba(0,184,217,.15);
    top: -90px; right: -70px;
}
.intro-visual h3 { font-size: 22px; margin-bottom: 22px; position: relative; z-index: 2; }
.intro-visual .flow-item {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
    font-size: 15px;
    position: relative;
    z-index: 2;
}
.intro-visual .flow-item i {
    width: 38px; height: 38px;
    flex-shrink: 0;
    border-radius: 10px;
    background: rgba(255,255,255,.16);
    border: 1px solid rgba(255,255,255,.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}
.intro-visual .flow-item em { font-style: normal; color: var(--c-cyan); font-weight: 700; }

/* ============================================================
   产品详情页
   ============================================================ */
.prod-hero {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 50px;
    align-items: center;
}
.prod-hero-img {
    background: linear-gradient(160deg, #f0f6ff, #e4eeff);
    border-radius: 18px;
    padding: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.prod-hero-img img { max-height: 340px; object-fit: contain; }
.prod-hero h2 { font-size: 30px; color: var(--c-primary); font-weight: 800; }
.prod-hero h2 span { color: var(--c-accent); }
.prod-hero .desc { margin-top: 16px; color: var(--c-text-muted); font-size: 14.5px; }
.prod-features { margin-top: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.prod-features li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--c-text);
    background: #f0f6ff;
    padding: 12px 16px;
    border-radius: 8px;
}
.prod-features li i { color: var(--c-accent); margin-top: 3px; }

/* 功能模块网格 */
.func-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.func-card { padding: 28px 24px; }
.func-card .func-icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary-dark));
    margin-bottom: 16px;
}
.func-card h3 { font-size: 16px; color: var(--c-primary); margin-bottom: 8px; }
.func-card p { font-size: 13px; color: var(--c-text-muted); }

/* 产品明细表格 */
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 10px; overflow: hidden; box-shadow: var(--shadow); }
.spec-table th, .spec-table td { padding: 14px 18px; font-size: 14px; text-align: left; border-bottom: 1px solid var(--c-border); }
.spec-table th { background: var(--c-primary); color: #fff; font-weight: 600; }
.spec-table tr:last-child td { border-bottom: none; }
.spec-table td:first-child { font-weight: 600; color: var(--c-primary); width: 180px; }
.spec-table tr:nth-child(even) td { background: #f7faff; }

/* ============================================================
   画廊
   ============================================================ */
.gallery {
    max-width: 860px;
    margin: 0 auto;
    background: #fff;
    border-radius: 14px;
    box-shadow: var(--shadow);
    padding: 26px;
}
.gallery-tabs { display: flex; justify-content: center; gap: 12px; margin-bottom: 20px; }
.gallery-tab {
    padding: 8px 24px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    color: var(--c-text-muted);
    border: 1.5px solid var(--c-border);
    transition: all .25s;
}
.gallery-tab.active { background: linear-gradient(135deg, var(--c-accent), var(--c-primary-dark)); color: #fff; border-color: transparent; }
.gallery-stage { position: relative; border-radius: 10px; overflow: hidden; background: #eef4ff; }
.gallery-main { height: 420px; display: flex; align-items: center; justify-content: center; }
.gallery-main img { max-height: 420px; object-fit: contain; }
.gallery-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px; height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,.9);
    color: var(--c-primary);
    box-shadow: 0 4px 12px rgba(6,31,77,.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    z-index: 5;
    transition: all .25s;
}
.gallery-arrow:hover { background: var(--c-accent); color: #fff; }
.gallery-prev { left: 14px; }
.gallery-next { right: 14px; }
.gallery-thumbs { display: flex; justify-content: center; gap: 12px; margin-top: 18px; flex-wrap: wrap; }
.gallery-thumbs button {
    width: 64px; height: 64px;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid transparent;
    padding: 0;
    transition: all .25s;
}
.gallery-thumbs button img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumbs button.active { border-color: var(--c-accent); }
.gallery-caption { text-align: center; margin-top: 18px; }
.gallery-caption h4 { color: var(--c-primary); font-size: 16px; margin-bottom: 6px; }
.gallery-caption p { font-size: 13.5px; color: var(--c-text-muted); }

/* ============================================================
   解决方案页
   ============================================================ */
.sol-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 46px;
    align-items: center;
    padding: 36px 0;
}
.sol-row + .sol-row { border-top: 1px solid var(--c-border); }
.sol-row:nth-child(even) .sol-visual { order: 2; }
.sol-visual {
    background: linear-gradient(135deg, var(--c-primary-dark), var(--c-accent));
    border-radius: 16px;
    padding: 34px 30px;
    color: #fff;
    min-height: 260px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 16px 34px rgba(11,58,140,.20);
}
.sol-visual h3 { font-size: 24px; margin-bottom: 8px; }
.sol-visual .sub { font-size: 14px; opacity: .85; margin-bottom: 18px; }
.sol-visual ul { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.sol-visual li { font-size: 13.5px; display: flex; gap: 8px; align-items: flex-start; }
.sol-visual li i { color: var(--c-cyan); margin-top: 3px; }
.sol-body h3 { font-size: 22px; color: var(--c-primary); margin-bottom: 14px; }
.sol-body p { font-size: 14.5px; color: var(--c-text-muted); margin-bottom: 10px; }
.sol-body .pain { font-size: 13px; color: #c0504d; }
.sol-body .pain i { margin-right: 6px; }
.sol-body ul.value { margin-top: 14px; }
.sol-body ul.value li { font-size: 14px; padding: 7px 0; display: flex; gap: 10px; align-items: flex-start; }
.sol-body ul.value li i { color: var(--c-accent); margin-top: 4px; }

/* ============================================================
   关于我们页
   ============================================================ */
.about-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.milestone { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.mile-card { text-align: center; padding: 30px 20px; position: relative; }
.mile-card .year {
    display: inline-block;
    font-size: 26px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary-dark));
    padding: 4px 20px;
    border-radius: 8px;
    margin-bottom: 16px;
}
.mile-card p { font-size: 13.5px; color: var(--c-text-muted); }

/* ============================================================
   联系我们
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.contact-info { background: #fff; border-radius: 12px; box-shadow: var(--shadow); padding: 34px 30px; }
.contact-info h3 { font-size: 20px; color: var(--c-primary); margin-bottom: 20px; }
.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 13px 0;
    border-bottom: 1px dashed var(--c-border);
    font-size: 14.5px;
}
.contact-list li:last-child { border-bottom: none; }
.contact-list i { color: var(--c-accent); margin-top: 4px; }
.contact-qrcode { width: 130px; height: 130px; border-radius: 8px; border: 1px solid var(--c-border); }
.contact-form { background: #fff; border-radius: 12px; box-shadow: var(--shadow); padding: 34px 30px; }
.contact-form h3 { font-size: 20px; color: var(--c-primary); margin-bottom: 20px; }
.form-group { margin-bottom: 16px; }
.form-group input, .form-group textarea {
    width: 100%;
    border: 1.5px solid var(--c-border);
    border-radius: 8px;
    padding: 12px 16px;
    outline: none;
    transition: border-color .25s;
    background: #fbfdff;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--c-accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-tip { margin-top: 10px; font-size: 13px; color: #2e9e4f; display: none; }
.form-tip.show { display: block; }
.form-tip.error { color: #d54343; }

/* ============================================================
   CTA 横幅
   ============================================================ */
.cta-banner {
    background: linear-gradient(120deg, var(--c-primary-deep), var(--c-accent));
    color: #fff;
    text-align: center;
    padding: 64px 0;
    position: relative;
    overflow: hidden;
}
.cta-banner::before {
    content: "";
    position: absolute;
    width: 340px; height: 340px;
    border-radius: 50%;
    background: rgba(0,184,217,.14);
    top: -140px; left: -100px;
}
.cta-banner h2 { font-size: 30px; font-weight: 800; }
.cta-banner p { margin: 12px auto 28px; max-width: 640px; opacity: .85; }
.cta-banner .btn { position: relative; z-index: 2; }

/* ============================================================
   页脚
   ============================================================ */
.footer { background: var(--c-primary-deep); color: rgba(255,255,255,.75); padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; }
.footer h4 {
    font-size: 16px;
    color: #fff;
    margin-bottom: 18px;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 10px;
}
.footer h4::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 30px; height: 3px;
    border-radius: 2px;
    background: var(--c-cyan);
}
.footer .f-about p { font-size: 13.5px; line-height: 1.9; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 13.5px; color: rgba(255,255,255,.75); }
.footer-links a:hover { color: var(--c-cyan); padding-left: 4px; }
.footer-contact li {
    display: flex;
    gap: 10px;
    font-size: 13.5px;
    margin-bottom: 12px;
    align-items: flex-start;
}
.footer-contact i { color: var(--c-cyan); margin-top: 4px; }
.footer-qr { text-align: center; }
.footer-qr img { width: 118px; height: 118px; border-radius: 8px; margin: 0 auto; }
.footer-qr span { display: block; font-size: 12.5px; margin-top: 8px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.12);
    padding: 18px 0;
    text-align: center;
    font-size: 13px;
}
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: var(--c-cyan); }

/* ============================================================
   滚动进场动画
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .7s ease, transform .7s ease;
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

/* ============================================================
   返回顶部
   ============================================================ */
.backtop {
    position: fixed;
    right: 26px;
    bottom: 40px;
    width: 46px; height: 46px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary-dark));
    color: #fff;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(30,111,255,.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: all .3s;
    z-index: 999;
}
.backtop.show { opacity: 1; visibility: visible; transform: translateY(0); }
.backtop:hover { transform: translateY(-4px); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
    .biz-grid, .about-grid, .mile-grid { grid-template-columns: repeat(2, 1fr); }
    .prod-grid, .news-grid, .coop-grid, .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .func-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-grid { grid-template-columns: repeat(3, 1fr); }
    .intro-grid, .prod-hero, .sol-row { grid-template-columns: 1fr; gap: 34px; }
    .sol-row:nth-child(even) .sol-visual { order: 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero { height: auto; min-height: 600px; }
    .hero-title { font-size: 36px; }
    .hero-visual { display: none; }
}

@media (max-width: 768px) {
    .topbar .topbar-right { display: none; }
    .nav-toggle { display: flex; }
    .nav-list {
        position: fixed;
        top: 0; right: 0;
        height: 100vh;
        width: 280px;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        padding: 84px 24px 30px;
        gap: 4px;
        box-shadow: -10px 0 30px rgba(6,31,77,.15);
        transform: translateX(100%);
        transition: transform .35s ease;
        z-index: 998;
    }
    .nav-list.open { transform: translateX(0); }
    .nav-list > li { width: 100%; }
    .nav-list > li > a { padding: 12px 10px; font-size: 16px; width: 100%; }
    .dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding: 0 0 0 16px;
        display: none;
    }
    .nav-list > li.open .dropdown { display: block; }
    .nav-cta { display: none; }
    .section { padding: 56px 0; }
    .hero-title { font-size: 28px; }
    .hero-sub { font-size: 15px; }
    .hero-stats { gap: 20px; }
    .hero-stats .stat + .stat { padding-left: 20px; }
    .hero-stats .stat b { font-size: 26px; }
    .page-banner h1 { font-size: 28px; }
    .section-title { font-size: 26px; }
    .biz-grid, .about-grid, .prod-grid, .news-grid, .coop-grid,
    .tech-grid, .func-grid, .case-grid, .mile-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .gallery-main { height: 300px; }
    .gallery-main img { max-height: 300px; }
    .hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .hero-stats .stat + .stat { border-left: none; padding-left: 0; }
    .home-stats .stat + .stat { border-left: none; padding-left: 0; }
    .backtop { right: 16px; bottom: 24px; }
}