/* ============================================================
   ITPTC 官网 V3 单页版样式（全新设计，独立于老站 CSS）
   设计语言：信任蓝 + 验证绿 · 大留白 · 卡片化 · 平滑动效
   ============================================================ */
:root{
  --blue:#0a4d8c; --blue-d:#083a6b; --blue-l:#0f6abc; --blue-bg:#eef5fc;
  --green:#159a5b; --green-l:#e8f7ef;
  --ink:#1c2733; --muted:#5b6b7c; --line:#e2e9f2; --bg:#f5f8fb;
  --radius:14px; --shadow:0 2px 12px rgba(10,44,80,.07);
  --shadow-h:0 12px 30px rgba(10,44,80,.14);
  --header-h:72px;
  --wrap:1280px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:15px}
a{color:var(--blue);text-decoration:none}
img{max-width:100%;display:block}
section{scroll-margin-top:calc(var(--header-h) + 14px)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.v3-header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--header-h);background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
.v3-header.scrolled{box-shadow:0 4px 22px rgba(10,44,80,.10)}
.v3-header .bar{max-width:var(--wrap);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;gap:26px}
.logo { text-decoration: none; }
.brand-text{font-size:17px;font-weight:700;color:var(--blue);letter-spacing:1px;white-space:nowrap}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:8px 15px;border-radius:8px;color:var(--ink);font-size:15.5px;transition:all .18s;position:relative}
.nav a:hover{color:var(--blue);background:var(--blue-bg)}
.nav a.active{color:var(--blue);font-weight:600}
.nav a.active::after{content:'';position:absolute;left:15px;right:15px;bottom:2px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--blue),var(--green))}
.head-phone{font-weight:700;color:var(--blue);white-space:nowrap;font-size:20px;letter-spacing:.5px}
.head-cta{background:var(--blue);color:#fff !important;padding:9px 18px !important;border-radius:9px;font-weight:500;transition:background .18s}
.head-cta:hover{background:var(--blue-d)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px;margin-left:auto}
.burger span{width:24px;height:2.6px;border-radius:2px;background:var(--ink);transition:all .2s}

/* ---------- Hero ----------（横幅为 2000x833 高清图，全幅沉浸展示） */
.hero{position:relative;min-height:clamp(520px,66vh,680px);display:flex;align-items:center;color:#fff;
  background:
    linear-gradient(180deg, rgba(6,32,60,.30) 0%, rgba(7,42,80,.42) 55%, rgba(8,50,94,.72) 100%),
    linear-gradient(115deg,rgba(10,77,140,.10) 0%,rgba(15,106,188,.05) 100%),
    var(--hero-img) center/cover no-repeat #0a4d8c;
  padding:calc(var(--header-h) + 46px) 0 64px}
.hero .wrap{width:100%}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:6px 16px;border-radius:999px;font-size:13.5px;letter-spacing:2px}
.hero-eyebrow::before{content:'';width:8px;height:8px;border-radius:50%;background:#4ade80;box-shadow:0 0 0 4px rgba(74,222,128,.25)}
.hero h1{font-size:clamp(30px,4.6vw,52px);line-height:1.25;margin:20px 0 12px;font-weight:700;letter-spacing:1px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#7cc4ff,#4ade80);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{max-width:640px;color:#d5e5f5;font-size:16.5px}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn-lg{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:11px;font-size:16px;transition:all .18s;border:1px solid transparent}
.btn-lg.primary{background:var(--green);color:#fff;box-shadow:0 8px 22px rgba(21,154,91,.35)}
.btn-lg.primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(21,154,91,.45)}
.btn-lg.ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn-lg.ghost:hover{background:rgba(255,255,255,.12)}
.hero-stats{display:flex;gap:46px;margin-top:54px;flex-wrap:wrap}
.hero-stats .s .n{font-size:34px;font-weight:700;color:#fff}
.hero-stats .s .n small{font-size:16px;margin-left:2px;color:#a9c8e6}
.hero-stats .s .t{color:#a9c8e6;font-size:13.5px}

/* ---------- 通用区块 ---------- */
.sec{padding:72px 0}
.sec.alt{background:#fff}
.sec-head{text-align:center;max-width:660px;margin:0 auto 44px}
.sec-head .eyebrow{color:var(--green);font-weight:600;letter-spacing:3px;font-size:13px;text-transform:uppercase}
.sec-head h2{font-size:clamp(24px,3vw,34px);margin:8px 0 10px;font-weight:700}
.sec-head .sub{color:var(--muted)}
.sec-head .line{width:56px;height:4px;border-radius:4px;margin:16px auto 0;background:linear-gradient(90deg,var(--blue),var(--green))}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 关于我们 ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
.about-media{position:relative;border-radius:18px;overflow:hidden;box-shadow:var(--shadow-h);min-height:340px;background:var(--blue-bg) center/cover no-repeat}
.about-media::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(7,38,70,.55));}
.about-media .tag{position:absolute;left:18px;bottom:16px;color:#fff;font-size:15px;font-weight:600;letter-spacing:1px}
.about-body h3{font-size:24px;margin-bottom:14px}
.about-body p{color:var(--muted);margin-bottom:18px}
.about-links{display:flex;flex-wrap:wrap;gap:9px;margin:18px 0 24px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 15px;font-size:13.5px;color:var(--ink);transition:all .16s}
.chip:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-bg)}

/* ---------- 服务方案 ---------- */
.svc-group{margin-bottom:36px}
.svc-group:last-child{margin-bottom:0}
.svc-group .gt{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:600;margin:0 0 18px}
.svc-group .gt::before{content:'';width:5px;height:20px;border-radius:3px;background:var(--blue)}
.svc-group.security .gt::before{background:var(--green)}
.grid{display:grid;gap:20px}
.grid.svc{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.svc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .2s;box-shadow:var(--shadow)}
.svc-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-h);border-color:#c6dcf3}
.svc-card .pic{height:150px;background:var(--blue-bg) center/cover no-repeat}
.svc-card .bd{padding:16px 18px 18px}
.svc-card .bd .t{font-size:17px;font-weight:600;margin-bottom:4px}
.svc-card .bd .d{color:var(--muted);font-size:13.5px;height:44px;overflow:hidden}
.svc-card .go{display:inline-block;margin-top:10px;font-size:13.5px;color:var(--blue);font-weight:500}

/* ---------- 案例 ---------- */
.grid.cases{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.case-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);transition:all .2s;display:flex;flex-direction:column}
.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-h)}
.case-card .pic{height:190px;background:var(--blue-bg) center/cover no-repeat;position:relative}
.case-card .pic .cat{position:absolute;left:12px;top:12px;background:rgba(10,77,140,.85);color:#fff;font-size:12px;padding:3px 11px;border-radius:999px}
.case-card .bd{padding:16px 18px 18px;flex:1}
.case-card .bd .t{font-size:16.5px;font-weight:600;margin-bottom:6px}
.case-card .bd .d{color:var(--muted);font-size:13.5px;height:60px;overflow:hidden}

/* ---------- 新闻 ---------- */
.news-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.news-main .hd{display:flex;justify-content:space-between;align-items:center;padding:16px 22px;border-bottom:1px solid var(--line)}
.news-main .hd .t{font-size:17px;font-weight:600}
.news-list{list-style:none}
.news-list li{border-bottom:1px solid var(--line)}
.news-list li:last-child{border-bottom:none}
.news-list a{display:flex;align-items:center;gap:14px;padding:15px 22px;transition:background .16s}
.news-list a:hover{background:var(--blue-bg)}
.news-list .badge{flex-shrink:0;background:var(--blue-bg);color:var(--blue);font-size:12px;padding:2px 10px;border-radius:999px}
.news-list .tt{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink)}
.news-list a:hover .tt{color:var(--blue)}
.news-list .dt{color:#93a3b5;font-size:13px;flex-shrink:0}
.news-side{display:flex;flex-direction:column;gap:20px}
.quick-card{background:linear-gradient(135deg,var(--blue) 0%,var(--blue-l) 100%);color:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-h)}
.quick-card.green{background:linear-gradient(135deg,#0e7a48,#159a5b)}
.quick-card .t{font-size:18px;font-weight:600;margin-bottom:6px}
.quick-card .d{color:#d3e6f8;font-size:13.5px;margin-bottom:16px}
.quick-card a{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);color:#fff;border-radius:9px;padding:9px 18px;font-size:14px;transition:background .16s}
.quick-card a:hover{background:rgba(255,255,255,.26)}

/* ---------- 联系我们 ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);text-align:center;transition:all .2s}
.contact-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-h)}
.contact-card .ic{font-size:30px;margin-bottom:10px}
.contact-card .t{font-weight:600;margin-bottom:6px}
.contact-card .d{color:var(--muted);font-size:14px;word-break:break-all}

/* ---------- 页脚 ---------- */
.v3-footer{background:linear-gradient(180deg,#0b3a63,#082c4c);color:#b9cde2;padding:40px 0 26px}
.v3-footer .inner{max-width:var(--wrap);margin:0 auto;padding:0 24px;display:flex;gap:30px;flex-wrap:wrap;align-items:flex-start;justify-content:space-between}
.v3-footer .brand{color:#fff;font-size:17px;font-weight:600;margin-bottom:8px}
.v3-footer .copyright{font-size:13px;line-height:2}
.v3-footer .copyright a{color:#8fb4d6}
.v3-footer .qr{background:#fff;padding:8px;border-radius:10px}
.v3-footer .qr img{width:110px}
.v3-footer .qr .t{text-align:center;font-size:12px;color:var(--muted);margin-top:4px}

/* ---------- 右侧浮动咨询面板（品牌蓝主调 + 验证绿点缀） ---------- */
.float-panel{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:95;width:196px;
  background:#fff;border-radius:14px;box-shadow:0 10px 32px rgba(9,42,76,.20);overflow:hidden;border:1px solid #d8e4f2}
.float-panel .fp-close{position:absolute;right:8px;top:8px;width:24px;height:24px;border-radius:7px;border:none;
  background:rgba(255,255,255,.22);color:#fff;cursor:pointer;font-size:12px;line-height:1;transition:all .15s}
.float-panel .fp-close:hover{background:rgba(255,255,255,.4)}
.float-panel .fp-head{background:linear-gradient(160deg,#0a4d8c 0%,#1273c4 100%);color:#fff;font-size:15.5px;font-weight:600;
  text-align:center;padding:14px 0 12px;letter-spacing:3px;position:relative}
.float-panel .fp-head::after{content:'';position:absolute;left:0;right:0;bottom:0;height:3px;
  background:linear-gradient(90deg,#159a5b,#7cc4ff)}
.float-panel .fp-wx{padding:12px 14px;border-bottom:1px solid #eef3fa;background:#f2fbf6}
.float-panel .fp-wx a{display:flex;align-items:center;justify-content:center;gap:7px;
  background:#07c160;color:#fff;font-size:14px;font-weight:600;border-radius:9px;padding:10px 0;
  transition:all .15s;box-shadow:0 4px 12px rgba(7,193,96,.32)}
.float-panel .fp-wx a:hover{filter:brightness(1.07);transform:translateY(-1px)}
.float-panel .fp-sec{padding:13px 14px 11px;border-bottom:1px solid #eef3fa}
.float-panel .fp-sec:last-child{border-bottom:none}
.float-panel .fp-tit{font-size:12.5px;color:#0a4d8c;font-weight:600;letter-spacing:1.5px;margin-bottom:8px;
  display:flex;align-items:center;gap:6px}
.float-panel .fp-tit::before{content:'';width:4px;height:12px;border-radius:2px;background:#159a5b}
.float-panel .fp-sec ul{list-style:none}
.float-panel .fp-sec ul li{margin-bottom:7px}
.float-panel .fp-sec ul li:last-child{margin-bottom:0}
.float-panel .fp-sec ul a{display:flex;align-items:center;gap:7px;font-size:13px;color:#2a3444;
  background:#fff;border:1px solid #dfe9f5;border-radius:8px;padding:7px 10px;transition:all .15s}
.float-panel .fp-sec ul a:hover{border-color:#1273c4;background:#f0f7ff;color:#0a4d8c;transform:translateX(2px)}
.float-panel .fp-tel{font-size:14.5px;font-weight:700;color:#0a4d8c;line-height:1.75;
  background:#f4f9f6;border:1px dashed #bfe3cf;border-radius:8px;padding:7px 10px;text-align:center}
.float-panel .fp-sec.qr{text-align:center;padding-bottom:15px;background:#f7fafd}
.float-panel .fp-sec.qr img{width:104px;height:104px;margin:2px auto 6px;border-radius:8px;border:2px solid #fff;box-shadow:0 2px 8px rgba(9,42,76,.12)}
.float-panel .fp-sec.qr div{font-size:12px;color:#8a94a6}

/* ---------- 浮动组件 ---------- */
.float-rail{position:fixed;right:18px;bottom:34px;z-index:90;display:flex;flex-direction:column;gap:12px}
.float-btn{width:52px;height:52px;border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:11px;color:#fff;box-shadow:0 6px 18px rgba(10,44,80,.25);cursor:pointer;border:none;transition:transform .18s}
.float-btn:hover{transform:translateY(-3px)}
.float-btn.qq{background:var(--blue)}
.float-btn.top{background:#33475c;display:none}
.float-btn.top.show{display:flex}

/* ---------- 详情弹窗 ---------- */
.modal-mask{position:fixed;inset:0;z-index:200;background:rgba(6,25,48,.55);backdrop-filter:blur(3px);
  display:none;align-items:center;justify-content:center;padding:24px}
.modal-mask.open{display:flex;animation:fadeIn .22s ease}
.modal{background:#fff;border-radius:18px;width:min(880px,100%);max-height:min(84vh,760px);
  display:flex;flex-direction:column;overflow:hidden;box-shadow:0 30px 80px rgba(4,24,48,.4);
  animation:popIn .26s cubic-bezier(.2,.9,.3,1.2)}
.modal-head{display:flex;align-items:flex-start;gap:14px;padding:22px 26px 16px;border-bottom:1px solid var(--line)}
.modal-head .meta{flex:1;min-width:0}
.modal-head .cat{display:inline-block;background:var(--blue-bg);color:var(--blue);font-size:12.5px;padding:2px 11px;border-radius:999px;margin-bottom:8px}
.modal-head h3{font-size:21px;line-height:1.45}
.modal-head .time{color:#93a3b5;font-size:13px;margin-top:4px}
.modal-close{flex-shrink:0;width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;
  font-size:17px;cursor:pointer;color:var(--muted);transition:all .15s;line-height:1}
.modal-close:hover{background:#fdecec;color:#cf222e;border-color:#f1b8be}
.modal-body{padding:22px 28px 30px;overflow-y:auto;font-size:15.5px;line-height:1.95;color:#2a3444}
.modal-body img{border-radius:10px;margin:10px auto;box-shadow:var(--shadow)}
.modal-body p{margin-bottom:12px}
.modal-body table{width:100% !important;border-collapse:collapse}
.modal-body table td,.modal-body table th{border:1px solid var(--line);padding:8px}
.modal-loading{padding:60px 20px;text-align:center;color:var(--muted)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0;transform:translateY(26px) scale(.96)}to{opacity:1;transform:none}}
@media (max-width:640px){
  .modal-mask{padding:0;align-items:flex-end}
  .modal{width:100%;max-height:92vh;border-radius:18px 18px 0 0}
  .modal-head{padding:16px 18px 12px}
  .modal-head h3{font-size:17.5px}
  .modal-body{padding:16px 18px 24px}
}
@media (max-width: 920px){
  .about-grid,.news-cols{grid-template-columns:1fr}
  .nav{position:fixed;top:var(--header-h);left:0;right:0;background:#fff;flex-direction:column;padding:12px 18px;gap:2px;box-shadow:0 14px 30px rgba(10,44,80,.15);display:none}
  .nav.open{display:flex}
  .nav a{padding:12px 14px}
  .head-phone{display:none}
  .burger{display:flex}
  .hero{min-height:clamp(460px,72vh,600px)}
  .hero-stats{gap:26px}
  .float-rail{right:10px;bottom:20px}
}
@media (max-width:640px){
  .float-panel{right:10px;width:172px;border-radius:12px}
  .float-panel .fp-sec ul a{font-size:12.5px;padding:6px 8px}
  .float-panel .fp-sec.qr img{width:88px;height:88px}
}