/* ========================================
   山东航亿信息科技有限公司 - 企业官网
   ======================================== */

/* 变量 */
:root {
    --blue: #1a5cff;
    --blue-dark: #1040cc;
    --blue-light: #e8eeff;
    --cyan: #00c6ff;
    --green: #10b981;
    --orange: #f97316;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --teal: #06b6d4;
    --text: #1a1a2e;
    --text2: #5a5a7a;
    --text3: #8a8aaa;
    --bg: #ffffff;
    --bg2: #f5f7fb;
    --bg3: #0b0f2a;
    --border: #e8eaf2;
    --r: 10px;
    --r2: 16px;
    --shadow: 0 4px 24px rgba(26,92,255,.08);
    --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* 重置 */
*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-padding-top:76px; }
body { font-family:var(--font); color:var(--text); background:var(--bg); line-height:1.7; overflow-x:hidden; }
a { text-decoration:none; color:inherit; }
ul,ol { list-style:none; }
img { max-width:100%; display:block; }
button { cursor:pointer; font-family:var(--font); }
.container { max-width:1200px; margin:0 auto; padding:0 24px; }

/* ========== 按钮 ========== */
.btn {
    display:inline-flex; align-items:center; justify-content:center;
    padding:12px 32px; border:none; border-radius:var(--r);
    font-size:15px; font-weight:600; transition:all .3s;
}
.btn-primary {
    background:linear-gradient(135deg,var(--blue),#3374ff); color:#fff;
    box-shadow:0 4px 16px rgba(26,92,255,.3);
}
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(26,92,255,.4); }
.btn-white { background:rgba(255,255,255,.15); color:#fff; border:2px solid rgba(255,255,255,.4); }
.btn-white:hover { background:rgba(255,255,255,.25); border-color:#fff; }
.btn-block { width:100%; }

/* ========== 通用段落标题 ========== */
.sec { padding:90px 0; }
.sec-header { text-align:center; margin-bottom:56px; }
.sec-header label {
    display:inline-block; padding:5px 18px; background:var(--blue-light);
    color:var(--blue); font-size:11px; font-weight:700; letter-spacing:3px;
    border-radius:20px; margin-bottom:14px;
}
.sec-header h2 { font-size:clamp(26px,3.2vw,38px); font-weight:800; margin-bottom:12px; }
.sec-header p { font-size:15px; color:var(--text2); max-width:520px; margin:0 auto; }

.sec-header-light label { background:rgba(255,255,255,.1); color:var(--cyan); }
.sec-header-light h2 { color:#fff; }
.sec-header-light p { color:rgba(255,255,255,.6); }

/* ========== 顶部导航 ========== */
.header {
    position:fixed; top:0; left:0; right:0; z-index:999;
    padding:16px 0; transition:all .3s;
}
.header.scrolled {
    padding:10px 0; background:rgba(255,255,255,.96);
    backdrop-filter:blur(16px); box-shadow:0 2px 12px rgba(0,0,0,.06);
}
.header-inner { display:flex; align-items:center; justify-content:space-between; }
.logo { display:flex; align-items:center; gap:10px; }
.logo-mark {
    width:40px; height:40px; border-radius:10px;
    background:linear-gradient(135deg,var(--blue),var(--cyan));
    color:#fff; font-size:18px; font-weight:800;
    display:flex; align-items:center; justify-content:center;
}
.logo-text strong { display:block; font-size:16px; color:#fff; letter-spacing:1px; transition:color .3s; }
.logo-text span { display:block; font-size:9px; color:rgba(255,255,255,.5); letter-spacing:2px; transition:color .3s; }
.header.scrolled .logo-text strong { color:var(--text); }
.header.scrolled .logo-text span { color:var(--text3); }

.nav { display:flex; gap:4px; }
.nav a { padding:8px 14px; font-size:14px; font-weight:500; color:rgba(255,255,255,.75); border-radius:var(--r); transition:all .25s; }
.nav a:hover { color:#fff; background:rgba(255,255,255,.12); }
.header.scrolled .nav a { color:var(--text2); }
.header.scrolled .nav a:hover { color:var(--blue); background:var(--blue-light); }

.header-btn {
    padding:8px 20px; background:rgba(255,255,255,.15); color:#fff;
    border:1px solid rgba(255,255,255,.3); border-radius:var(--r);
    font-size:13px; font-weight:600; transition:all .25s;
}
.header-btn:hover { background:rgba(255,255,255,.25); }
.header.scrolled .header-btn { background:var(--blue); border-color:var(--blue); color:#fff; }

.menu-btn {
    display:none; flex-direction:column; gap:5px;
    background:none; border:none; padding:4px;
}
.menu-btn span { width:22px; height:2px; background:#fff; border-radius:2px; transition:all .3s; }
.header.scrolled .menu-btn span { background:var(--text); }
.menu-btn.open span:nth-child(1) { transform:rotate(45deg) translate(5px,5px); }
.menu-btn.open span:nth-child(2) { opacity:0; }
.menu-btn.open span:nth-child(3) { transform:rotate(-45deg) translate(5px,-5px); }

/* ========== 首屏横幅 ========== */
.banner {
    position:relative; min-height:100vh; display:flex; align-items:center;
    padding:120px 0 80px; overflow:hidden;
    background:linear-gradient(135deg,#080c24 0%,#101a42 40%,#162360 70%,#0c1a50 100%);
}
.banner-overlay {
    position:absolute; inset:0;
    background:
        radial-gradient(ellipse 70% 50% at 20% 80%, rgba(26,92,255,.22) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 80% 20%, rgba(0,198,255,.16) 0%, transparent 50%);
}
.banner-body { position:relative; z-index:1; display:flex; align-items:center; gap:60px; color:#fff; }
.banner-left { flex:1; }
.banner-badge {
    display:inline-block; padding:6px 18px; margin-bottom:20px;
    background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.12);
    border-radius:20px; font-size:13px; color:var(--cyan); letter-spacing:1px;
}
.banner-left h1 { font-size:clamp(30px,4.5vw,52px); font-weight:800; line-height:1.3; margin-bottom:20px; letter-spacing:1px; }
.banner-left h1 em { font-style:normal; background:linear-gradient(135deg,#fff,var(--cyan)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.banner-left > p { font-size:15px; color:rgba(255,255,255,.7); line-height:1.8; margin-bottom:32px; max-width:560px; }
.banner-btns { display:flex; gap:14px; }

.banner-right { flex-shrink:0; width:380px; }
.data-cards { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.data-card {
    padding:28px 20px; background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.1);
    border-radius:var(--r2); text-align:center; transition:all .3s;
}
.data-card:hover { background:rgba(255,255,255,.1); border-color:rgba(255,255,255,.18); transform:translateY(-4px); }
.data-num { font-size:36px; font-weight:900; line-height:1; background:linear-gradient(135deg,#fff,var(--cyan)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.data-num span { font-size:16px; }
.data-label { font-size:13px; color:rgba(255,255,255,.55); margin-top:6px; }

/* ========== 关于我们 ========== */
.about { background:var(--bg2); }

.about-intro { display:flex; gap:48px; margin-bottom:56px; align-items:flex-start; }
.about-intro-left { flex:1; }
.intro-badge { display:inline-block; padding:4px 14px; background:var(--blue-light); color:var(--blue); font-size:12px; font-weight:700; border-radius:4px; margin-bottom:14px; }
.about-intro-left h3 { font-size:22px; font-weight:700; margin-bottom:16px; }
.about-intro-left p { font-size:14px; color:var(--text2); line-height:1.9; margin-bottom:12px; }
.about-intro-left strong { color:var(--text); }

.about-intro-right { flex-shrink:0; width:280px; }
.intro-stats { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.intro-stat {
    padding:24px 16px; background:#fff; border-radius:var(--r);
    text-align:center; box-shadow:var(--shadow);
}
.intro-stat strong { display:block; font-size:22px; font-weight:800; color:var(--blue); }
.intro-stat span { display:block; font-size:12px; color:var(--text3); margin-top:4px; }

/* 三大特色 */
.about-features { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; margin-bottom:56px; }
.af-card {
    padding:32px 24px; background:#fff; border-radius:var(--r2); text-align:center;
    box-shadow:var(--shadow); transition:all .3s;
}
.af-card:hover { transform:translateY(-6px); box-shadow:0 12px 36px rgba(26,92,255,.12); }
.af-icon {
    width:64px; height:64px; border-radius:16px; margin:0 auto 18px;
    display:flex; align-items:center; justify-content:center;
}
.af-icon-1 { background:var(--blue-light); color:var(--blue); }
.af-icon-2 { background:#ecfdf5; color:var(--green); }
.af-icon-3 { background:#fff7ed; color:var(--orange); }
.af-card h4 { font-size:17px; font-weight:700; margin-bottom:8px; }
.af-card p { font-size:13px; color:var(--text2); line-height:1.7; }

/* 发展历程 */
.timeline-title { font-size:20px; font-weight:700; text-align:center; margin-bottom:32px; }
.timeline { display:grid; grid-template-columns:repeat(6,1fr); gap:0; position:relative; }
.timeline::before {
    content:''; position:absolute; top:20px; left:8%; right:8%;
    height:3px; background:linear-gradient(90deg,var(--blue),var(--cyan)); border-radius:2px;
}
.tl-item { text-align:center; position:relative; padding:0 8px; }
.tl-dot {
    width:14px; height:14px; border-radius:50%; background:var(--blue);
    margin:14px auto 16px; position:relative; z-index:1;
    box-shadow:0 0 0 5px var(--blue-light);
}
.tl-content strong { display:block; font-size:14px; font-weight:700; color:var(--blue); }
.tl-content span { display:block; font-size:13px; font-weight:600; color:var(--text); margin:2px 0; }
.tl-content p { font-size:12px; color:var(--text3); line-height:1.5; }

/* ========== 核心服务 ========== */
.services { background:#fff; }
.svc-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.svc-card {
    padding:28px 24px; border:1px solid var(--border); border-radius:var(--r2);
    transition:all .3s; position:relative; overflow:hidden;
}
.svc-card::after {
    content:''; position:absolute; top:0; left:0; right:0; height:3px;
    background:linear-gradient(90deg,var(--blue),var(--cyan));
    transform:scaleX(0); transform-origin:left; transition:transform .4s;
}
.svc-card:hover { transform:translateY(-4px); box-shadow:var(--shadow); border-color:transparent; }
.svc-card:hover::after { transform:scaleX(1); }

.svc-icon {
    width:52px; height:52px; border-radius:14px;
    background:var(--bg); display:flex; align-items:center; justify-content:center;
    margin-bottom:16px;
}
.svc-body h3 { font-size:17px; font-weight:700; margin-bottom:8px; }
.svc-body p { font-size:13px; color:var(--text2); line-height:1.7; margin-bottom:14px; }
.svc-body ul { display:flex; flex-direction:column; gap:6px; }
.svc-body li { font-size:12px; color:var(--text2); padding-left:18px; position:relative; }
.svc-body li::before {
    content:''; position:absolute; left:0; top:6px;
    width:7px; height:7px; border-radius:50%;
    background:linear-gradient(135deg,var(--blue),var(--cyan));
}

/* ========== 企业优势 ========== */
.advantages { background:var(--bg3); color:#fff; }
.adv-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.adv-card {
    padding:30px 24px; border:1px solid rgba(255,255,255,.07);
    border-radius:var(--r2); background:rgba(255,255,255,.03);
    transition:all .3s;
}
.adv-card:hover { background:rgba(255,255,255,.06); border-color:rgba(26,92,255,.3); transform:translateY(-4px); }
.adv-num {
    font-size:34px; font-weight:900; line-height:1;
    background:linear-gradient(135deg,var(--blue),var(--cyan));
    -webkit-background-clip:text; -webkit-text-fill-color:transparent;
    margin-bottom:14px;
}
.adv-card h4 { font-size:17px; font-weight:700; margin-bottom:8px; }
.adv-card p { font-size:13px; color:rgba(255,255,255,.5); line-height:1.7; }

/* ========== 解决方案 ========== */
.cases { background:var(--bg2); }

.tabs { display:flex; justify-content:center; gap:8px; margin-bottom:32px; flex-wrap:wrap; }
.tab {
    padding:9px 22px; border:1px solid var(--border); background:#fff;
    border-radius:var(--r); font-size:14px; font-weight:600; color:var(--text2);
    transition:all .25s;
}
.tab:hover { border-color:var(--blue); color:var(--blue); }
.tab.active { background:var(--blue); border-color:var(--blue); color:#fff; box-shadow:0 4px 14px rgba(26,92,255,.3); }

.tab-panels { background:#fff; border-radius:var(--r2); overflow:hidden; box-shadow:var(--shadow); }
.tab-panel { display:none; }
.tab-panel.active { display:block; }

.case-detail { display:flex; gap:40px; padding:40px; align-items:center; }
.case-info { flex:1; }
.case-info h3 { font-size:22px; font-weight:700; margin-bottom:14px; }
.case-info > p { font-size:14px; color:var(--text2); line-height:1.8; margin-bottom:20px; }
.case-list { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.case-li { display:flex; align-items:center; gap:10px; font-size:14px; font-weight:500; }
.case-li i {
    flex-shrink:0; width:20px; height:20px; background:var(--blue-light);
    border-radius:50%; position:relative;
}
.case-li i::after {
    content:''; position:absolute; top:50%; left:50%;
    width:7px; height:4px; border-left:2px solid var(--blue); border-bottom:2px solid var(--blue);
    transform:translate(-50%,-60%) rotate(-45deg);
}

.case-visual { flex-shrink:0; width:260px; }
.case-vcard {
    text-align:center; padding:44px 28px; border-radius:var(--r2);
}
.case-vcard-gov { background:linear-gradient(135deg,var(--blue-light),rgba(0,198,255,.1)); }
.case-vcard-bank { background:linear-gradient(135deg,#ecfdf5,rgba(16,185,129,.1)); }
.case-vcard-hospital { background:linear-gradient(135deg,#fff7ed,rgba(249,115,22,.1)); }
.case-vcard-edu { background:linear-gradient(135deg,#f5f3ff,rgba(139,92,246,.1)); }
.case-vcard-corp { background:linear-gradient(135deg,#ecfeff,rgba(6,182,212,.1)); }
.cv-icon { font-size:56px; margin-bottom:12px; }
.case-vcard h4 { font-size:16px; font-weight:700; margin-bottom:6px; }
.case-vcard p { font-size:12px; color:var(--text2); line-height:1.7; }

/* ========== 合作流程 ========== */
.process { background:#fff; }
.flow { display:flex; justify-content:center; gap:0; }
.flow-item { flex:1; text-align:center; max-width:240px; position:relative; padding:0 16px; }
.flow-num {
    width:56px; height:56px; border-radius:50%; margin:0 auto 16px;
    background:linear-gradient(135deg,var(--blue),var(--cyan));
    color:#fff; font-size:20px; font-weight:800;
    display:flex; align-items:center; justify-content:center;
}
.flow-arrow {
    position:absolute; top:28px; left:calc(50% + 40px);
    width:calc(100% - 80px); height:2px;
    background:linear-gradient(90deg,var(--blue),var(--cyan)); opacity:.25;
}
.flow-item:last-child .flow-arrow { display:none; }
.flow-item h4 { font-size:15px; font-weight:700; margin-bottom:6px; }
.flow-item p { font-size:12px; color:var(--text2); line-height:1.6; }

/* ========== 新闻动态 ========== */
.news { background:var(--bg2); }
.news-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.news-card {
    background:#fff; border-radius:var(--r2); overflow:hidden;
    border:1px solid var(--border); transition:all .3s;
}
.news-card:hover { transform:translateY(-4px); box-shadow:var(--shadow); border-color:transparent; }
.news-img { height:180px; }
.news-img-1 { background:linear-gradient(135deg,#1a2a6c,#b21f1f,#fdbb2d); }
.news-img-2 { background:linear-gradient(135deg,#11998e,#38ef7d); }
.news-img-3 { background:linear-gradient(135deg,#fc4a1a,#f7b733); }

.news-body { padding:20px; }
.news-body time { font-size:12px; color:var(--text3); }
.news-body h4 { font-size:15px; font-weight:700; line-height:1.5; margin:6px 0 8px; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.news-body p { font-size:13px; color:var(--text2); line-height:1.6; display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; margin-bottom:10px; }
.news-body a { font-size:13px; font-weight:600; color:var(--blue); }
.news-body a:hover { text-decoration:underline; }

/* ========== 客户信赖 ========== */
.trust { padding:70px 0; overflow:hidden; }
.trust-scroll {
    overflow:hidden;
    mask-image:linear-gradient(to right,transparent,#000 10%,#000 90%,transparent);
    -webkit-mask-image:linear-gradient(to right,transparent,#000 10%,#000 90%,transparent);
}
.trust-track { display:flex; gap:20px; animation:scroll 30s linear infinite; width:max-content; }
.trust-item {
    padding:14px 28px; background:var(--bg2); border-radius:var(--r);
    font-size:14px; font-weight:600; color:var(--text2); white-space:nowrap; flex-shrink:0;
}
@keyframes scroll { 0%{transform:translateX(0)} 100%{transform:translateX(-50%)} }

/* ========== 联系我们 ========== */
.contact { background:#fff; }
.contact-grid { display:grid; grid-template-columns:1fr 1.3fr; gap:48px; align-items:start; }
.contact-info { display:flex; flex-direction:column; gap:20px; }
.ci-item { display:flex; gap:14px; }
.ci-icon {
    flex-shrink:0; width:44px; height:44px; background:var(--blue-light);
    border-radius:var(--r); display:flex; align-items:center; justify-content:center;
    color:var(--blue);
}
.ci-item strong { display:block; font-size:14px; font-weight:700; margin-bottom:2px; }
.ci-item p { font-size:13px; color:var(--text2); }

.contact-form-wrap { background:var(--bg2); padding:32px; border-radius:var(--r2); }
.form-row2 { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.fg { margin-bottom:16px; }
.fg label { display:block; font-size:13px; font-weight:600; margin-bottom:6px; }
.fg label em { color:#ef4444; font-style:normal; }
.fg input,.fg select,.fg textarea {
    width:100%; padding:10px 14px; border:1px solid var(--border);
    border-radius:var(--r); font-size:14px; font-family:var(--font);
    color:var(--text); transition:all .25s; background:#fff;
}
.fg input:focus,.fg select:focus,.fg textarea:focus { outline:none; border-color:var(--blue); box-shadow:0 0 0 3px rgba(26,92,255,.1); }
.fg textarea { resize:vertical; }

/* ========== 页脚 ========== */
.footer { background:var(--bg3); color:rgba(255,255,255,.65); padding:56px 0 0; }
.footer-top {
    display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:36px;
    padding-bottom:36px; border-bottom:1px solid rgba(255,255,255,.08);
}
.ft-logo { display:flex; align-items:center; gap:8px; margin-bottom:12px; }
.ft-logo .logo-mark { width:32px; height:32px; font-size:14px; border-radius:8px; }
.ft-logo strong { color:#fff; font-size:17px; }
.ft-brand p { font-size:12px; color:rgba(255,255,255,.4); margin-bottom:3px; }
.ft-links h4 { font-size:14px; font-weight:700; color:#fff; margin-bottom:14px; }
.ft-links a { display:block; font-size:12px; color:rgba(255,255,255,.4); padding:3px 0; transition:color .25s; }
.ft-links a:hover { color:var(--cyan); }

.footer-bottom {
    display:flex; justify-content:space-between; align-items:center;
    padding:18px 0; font-size:12px; color:rgba(255,255,255,.25);
}
.footer-bottom a { color:rgba(255,255,255,.25); }
.footer-bottom a:hover { color:var(--cyan); }

/* ========== 返回顶部 ========== */
.back-top {
    position:fixed; bottom:28px; right:28px; z-index:900;
    width:44px; height:44px; border-radius:50%; border:none;
    background:var(--blue); color:#fff; font-size:18px; font-weight:700;
    box-shadow:0 4px 16px rgba(26,92,255,.3);
    opacity:0; transform:translateY(16px); transition:all .3s;
    display:flex; align-items:center; justify-content:center;
}
.back-top.show { opacity:1; transform:translateY(0); }
.back-top:hover { transform:translateY(-3px); box-shadow:0 8px 24px rgba(26,92,255,.4); }

/* ========== 响应式 ========== */
@media(max-width:1024px) {
    .banner-body { flex-direction:column; text-align:center; }
    .banner-left > p { margin-left:auto; margin-right:auto; }
    .banner-btns { justify-content:center; }
    .banner-right { width:100%; max-width:400px; }
    .about-intro { flex-direction:column; }
    .about-intro-right { width:100%; }
    .svc-grid { grid-template-columns:repeat(2,1fr); }
    .adv-grid { grid-template-columns:repeat(2,1fr); }
    .case-detail { flex-direction:column; }
    .case-visual { width:100%; }
    .case-list { grid-template-columns:1fr; }
    .timeline { grid-template-columns:repeat(3,1fr); }
    .news-grid { grid-template-columns:repeat(2,1fr); }
    .footer-top { grid-template-columns:repeat(2,1fr); }
}

@media(max-width:768px) {
    .nav {
        display:none; position:absolute; top:100%; left:0; right:0;
        background:rgba(255,255,255,.98); backdrop-filter:blur(16px);
        flex-direction:column; padding:12px; box-shadow:var(--shadow);
        border-radius:0 0 var(--r) var(--r);
    }
    .nav.open { display:flex; }
    .nav a { color:var(--text2); padding:10px 14px; }
    .nav a:hover { color:var(--blue); background:var(--blue-light); }
    .header-btn { display:none; }
    .menu-btn { display:flex; }

    .about-features { grid-template-columns:1fr; }
    .svc-grid { grid-template-columns:1fr; }
    .adv-grid { grid-template-columns:1fr; }
    .timeline { grid-template-columns:repeat(2,1fr); }
    .flow { flex-direction:column; align-items:center; gap:28px; }
    .flow-arrow { display:none; }
    .news-grid { grid-template-columns:1fr; }
    .contact-grid { grid-template-columns:1fr; }
    .form-row2 { grid-template-columns:1fr; }
    .footer-top { grid-template-columns:1fr; gap:24px; }
    .footer-bottom { flex-direction:column; gap:6px; text-align:center; }
}

@media(max-width:480px) {
    .banner-btns { flex-direction:column; align-items:center; }
    .data-cards { grid-template-columns:1fr 1fr; gap:10px; }
    .data-num { font-size:28px; }
    .tab { padding:7px 14px; font-size:12px; }
}