/* =============================================================
   氢课科技 · 企业门户设计系统 v1.0
   定位：大企业门户感。深蓝墨权威底 + 浅色留白内容区。
   规范：8pt 栅格 / 区块留白 120-160px / 标题衬线 48-72px / 正文 16px+
   原则：克制、留白、可验证、移动秒开。全部资源自绘，零外链图。
   ============================================================= */
:root{
  /* 品牌色板（企业门户） */
  --navy:#0B1B33;        /* 深蓝墨：Hero/数据带/页脚 权威底 */
  --navy-2:#12264A;      /* 深蓝墨亮一档 */
  --primary:#0051C3;     /* 主蓝：品牌与主按钮 */
  --blue:#2D8DF0;        /* 亮蓝：链接与高亮 */
  --gold:#C9A063;        /* 金：点缀，克制使用 */
  --cyan:#19B6E8;        /* 青：数据与图表 */
  --heading:#101F3C;     /* 标题深色 */
  --text:#3A4151;        /* 正文 */
  --text-weak:#6B7280;   /* 次要文字 */
  --text-mute:#9CA3AF;   /* 弱化文字 */
  --bg:#F7F9FC;          /* 浅色内容底 */
  --white:#FFFFFF;
  --line:#E5EAF2;

  /* 圆角 */
  --r-sm:8px; --r-md:12px; --r-lg:16px; --r-pill:40px;
  /* 阴影 */
  --shadow:0 10px 32px rgba(11,27,51,.08);
  --shadow-hover:0 18px 44px rgba(11,27,51,.14);
  /* 布局 */
  --container:1200px;
  --header-h:84px;
  /* 字体 */
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Microsoft YaHei","微软雅黑","PingFang SC","Hiragino Sans GB",sans-serif;
  /* 动效 */
  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:.25s; --t-base:.35s;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 8px)}
body{
  font-family:var(--sans);font-size:16px;color:var(--text);line-height:1.75;
  background-color:var(--bg);
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='140' height='140' filter='url(%23n)' opacity='0.025'/></svg>");
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
ul{list-style:none}img{max-width:100%;display:block}svg{display:block}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
:focus-visible{outline:3px solid rgba(45,141,240,.55);outline-offset:2px;border-radius:4px}

/* =========================================================
   顶部导航（白色细线 + 衬线 logo）
   ========================================================= */
.site-header{position:fixed;top:0;left:0;width:100%;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);z-index:1000;border-bottom:1px solid var(--line);
  transition:box-shadow var(--t-fast)}
.site-header.scrolled{box-shadow:0 8px 24px rgba(11,27,51,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.logo{font-family:var(--serif);font-size:24px;font-weight:500;color:var(--heading)}
.main-nav ul{display:flex;align-items:center;gap:4px}
.main-nav a{display:block;padding:10px 16px;font-size:15px;color:var(--text);
  border-radius:8px;transition:color var(--t-fast),background var(--t-fast);position:relative}
.main-nav a:hover{color:var(--primary);background:#F0F5FD}
.main-nav a.active{color:var(--primary);font-weight:500}
.main-nav a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;
  border-radius:2px;background:var(--gold)}
.nav-cta{background:var(--navy);color:#fff !important;padding:11px 24px !important;border-radius:var(--r-pill)}
.nav-cta:hover{background:var(--primary);color:#fff !important}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:26px;height:2px;background:var(--heading);border-radius:2px;transition:var(--t-base)}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* =========================================================
   导航下拉菜单
   ========================================================= */
.main-nav .has-sub{position:relative}
.main-nav .has-sub>a{padding-right:28px}
.main-nav .has-sub>a::after{content:"";position:absolute;right:12px;top:50%;width:0;height:0;
  border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;
  transform:translateY(-50%);transition:transform var(--t-fast)}
.main-nav .has-sub:hover>a::after{transform:translateY(-50%) rotate(180deg)}
.main-nav .sub-menu{position:absolute;top:100%;left:0;min-width:180px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-sm);box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(8px);transition:all var(--t-base);padding:6px 0;z-index:100}
.main-nav .has-sub:hover .sub-menu{opacity:1;visibility:visible;transform:translateY(0)}
.main-nav .sub-menu li{list-style:none}
.main-nav .sub-menu a{padding:10px 18px;font-size:14px;display:block;border-radius:0;border-bottom:none}
.main-nav .sub-menu a:hover{background:#F0F5FD;color:var(--primary)}

/* =========================================================
   导航下拉菜单（移动端）
   ========================================================= */
@media (max-width:768px){
  .main-nav .has-sub .sub-menu{position:static;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:none;padding:0 0 0 18px;display:none;background:#FAFBFC}
  .main-nav .has-sub.open-sub .sub-menu{display:block}
  .main-nav .sub-menu a{padding:12px 16px;font-size:13px;border-bottom:1px solid var(--line)}
}

/* =========================================================
   首屏信任标签
   ========================================================= */
.trust-tags{display:flex;flex-wrap:wrap;gap:10px 14px;margin-top:32px}
.trust-tags span{font-size:13px;color:rgba(255,255,255,.88);padding:6px 14px;
  border:1px solid rgba(255,255,255,.25);border-radius:var(--r-pill);
  background:rgba(255,255,255,.06);backdrop-filter:blur(6px);letter-spacing:.5px}

/* =========================================================
   Hero（双屏轮播 · 深蓝墨权威底）
   ========================================================= */
.hero{position:relative;margin-top:var(--header-h);height:min(94vh,900px);min-height:620px;
  background-color:var(--navy);color:#fff;overflow:hidden}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .9s var(--ease);
  display:flex;align-items:center;z-index:1;background-color:var(--navy);
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1.4px);background-size:30px 30px}
.hero-slide.active{opacity:1}
.hero-slide.s1{background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1.4px),linear-gradient(135deg,#0B1B33 0%,#10284F 55%,#123A70 100%)}
.hero-slide.s2{background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1.4px),linear-gradient(135deg,#0B1B33 0%,#0E2A52 50%,#14407F 100%)}
.hero-slide.s3{background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1.4px),linear-gradient(135deg,#0B1B33 0%,#122C56 45%,#1D63C9 100%)}
.hero-slide::after{content:"";position:absolute;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(45,141,240,.22),transparent 62%)}
.hero-slide.s1::after{right:-140px;top:-160px}
.hero-slide.s2::after{left:-140px;bottom:-180px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(80,133,233,.16),transparent 62%)}
.hero-slide.s3::after{right:-120px;bottom:-160px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(201,160,99,.15),transparent 62%)}
.hero-inner{position:relative;z-index:2;padding:88px 0 96px;max-width:860px}
.hero .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:3px;
  color:var(--gold);margin-bottom:26px;text-transform:uppercase}
.hero .eyebrow::before{content:"";width:34px;height:1px;background:var(--gold)}
.hero h1{font-family:var(--serif);font-size:clamp(30px,4.4vw,48px);font-weight:500;
  line-height:1.28;letter-spacing:1px;margin-bottom:26px}
.hero h1 b{font-weight:500;color:var(--gold)}
.hero .sub{font-size:clamp(15px,1.6vw,18px);color:rgba(255,255,255,.82);
  max-width:620px;line-height:1.9;margin-bottom:40px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-arrow{position:absolute;top:46%;transform:translateY(-50%);z-index:4;width:48px;height:48px;
  border-radius:50%;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.28);color:#fff;
  display:grid;place-items:center;cursor:pointer;transition:background var(--t-fast)}
.hero-arrow:hover{background:rgba(255,255,255,.18)}
.hero-arrow svg{width:20px;height:20px}
.hero-arrow.prev{left:20px}
.hero-arrow.next{right:20px}
.hero-dots{position:absolute;left:50%;bottom:100px;transform:translateX(-50%);z-index:4;display:flex;gap:10px}
.hero-dots button{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.4);
  cursor:pointer;transition:width var(--t-base),background var(--t-base)}
.hero-dots button.active{background:var(--gold);width:28px;border-radius:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;
  border-radius:var(--r-pill);font-size:15px;font-weight:500;cursor:pointer;border:1px solid transparent;
  transition:transform var(--t-fast) var(--ease),background var(--t-fast),box-shadow var(--t-fast)}
.btn:active{transform:scale(.97)}
.btn-gold{background:var(--gold);color:#0B1B33;box-shadow:0 10px 26px rgba(201,160,99,.35)}
.btn-gold:hover{filter:brightness(1.06);transform:translateY(-2px)}
.btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-line:hover{background:rgba(255,255,255,.1);transform:translateY(-2px)}
.hero-strip{position:absolute;left:0;right:0;bottom:0;z-index:3;border-top:1px solid rgba(255,255,255,.12)}
.strip-inner{display:flex;flex-wrap:wrap;gap:14px 56px;padding:26px 0}
.strip-item{display:flex;flex-direction:column;gap:4px}
.strip-item b{font-size:15px;font-weight:500;color:#fff}
.strip-item span{font-size:13px;color:rgba(255,255,255,.6)}

/* =========================================================
   区块通用
   ========================================================= */
.section{padding:120px 0}
.sec-head{max-width:760px;margin-bottom:56px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-eyebrow{font-size:13px;letter-spacing:3px;color:var(--primary);margin-bottom:16px;display:block}
.sec-head.center .sec-eyebrow{letter-spacing:4px}
.sec-title{font-family:var(--serif);font-size:clamp(26px,3.2vw,40px);font-weight:500;
  color:var(--heading);line-height:1.35;margin-bottom:18px}
.sec-title::after{content:"";display:block;width:52px;height:3px;border-radius:3px;
  background:var(--gold);margin-top:18px}
.sec-head.center .sec-title::after{margin-left:auto;margin-right:auto}
.sec-desc{font-size:16px;color:var(--text-weak);line-height:1.9}

/* =========================================================
   数据带（深蓝墨）
   ========================================================= */
.data-band{background:var(--navy);color:#fff;padding:72px 0}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.data-item{border-left:1px solid rgba(255,255,255,.14);padding-left:22px}
.data-item b{display:block;font-family:var(--serif);font-size:30px;font-weight:500;color:#fff;margin-bottom:6px}
.data-item span{font-size:14px;color:rgba(255,255,255,.62)}

/* =========================================================
   业务版图
   ========================================================= */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.biz-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:40px 34px;
  transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease);position:relative;overflow:hidden}
.biz-card::before{content:"";position:absolute;left:0;top:0;height:4px;width:100%;
  background:linear-gradient(90deg,var(--primary),var(--gold));transform:scaleX(0);transform-origin:left;
  transition:transform var(--t-base) var(--ease)}
.biz-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.biz-card:hover::before{transform:scaleX(1)}
.biz-num{font-family:var(--serif);font-size:15px;color:var(--gold);letter-spacing:2px;margin-bottom:18px}
.biz-icon{width:56px;height:56px;border-radius:14px;background:#EFF5FE;color:var(--primary);
  display:grid;place-items:center;margin-bottom:20px}
.biz-icon svg{width:28px;height:28px}
.biz-card h3{font-size:22px;color:var(--heading);margin-bottom:10px;font-weight:500}
.biz-card>p{font-size:14px;color:var(--text-weak);margin-bottom:20px;line-height:1.8}
.biz-card ul li{position:relative;padding-left:18px;font-size:14px;color:var(--text);margin-bottom:8px}
.biz-card ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--gold)}

/* =========================================================
   解决方案（通用 + GEO 版）
   ========================================================= */
.sol-grid{display:grid;gap:22px}
.sol-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:30px 26px;
  transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease)}
.sol-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.sol-tag{display:inline-block;font-size:12px;letter-spacing:1px;color:var(--primary);
  background:#EAF3FF;border-radius:20px;padding:4px 14px;margin-bottom:16px}
.sol-card h3{font-size:18px;color:var(--heading);margin-bottom:10px;font-weight:500}
.sol-card p{font-size:14px;color:var(--text-weak);line-height:1.8}

/* GEO 解决方案 3 列 */
.geo-sol-grid{grid-template-columns:repeat(4,1fr);gap:24px}
.sol-points{margin:14px 0;padding-left:0;list-style:none}
.sol-points li{position:relative;padding:4px 0 4px 18px;font-size:13px;color:var(--text);line-height:1.7}
.sol-points li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
.sol-cta{display:inline-block;margin-top:16px;font-size:13px;color:var(--primary);font-weight:500;
  transition:color var(--t-fast)}
.sol-cta:hover{color:var(--gold)}
@media (max-width:992px){.geo-sol-grid{grid-template-columns:1fr}}

/* 节点式内联 CTA */
.inline-cta{margin-top:48px;text-align:center;padding:28px 24px;background:#F0F5FE;border-radius:var(--r-lg);
  border:1px dashed var(--line)}
.inline-cta p{font-size:15px;color:var(--heading);margin-bottom:14px}

/* =========================================================
   自研技术体系 · 三层架构图
   ========================================================= */
.tech-section{background:#fff}
.tech-stack{display:flex;flex-direction:column;gap:20px;max-width:1000px;margin:0 auto}
.tech-layer{display:grid;grid-template-columns:80px 1fr;gap:24px;
  background:linear-gradient(135deg,#F7F9FC 0%,#EFF5FE 100%);
  border:1px solid var(--line);border-radius:var(--r-lg);padding:36px 32px;position:relative;overflow:hidden;
  transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease)}
.tech-layer:hover{transform:translateX(6px);box-shadow:var(--shadow)}
.tech-layer::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--primary),var(--gold))}
.tech-num{font-family:var(--serif);font-size:48px;font-weight:500;color:var(--primary);opacity:.22;
  display:flex;align-items:flex-start;justify-content:center;line-height:1}
.tech-body h3{font-size:20px;color:var(--heading);font-weight:500;margin-bottom:8px}
.tech-head{display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.tech-tag{font-size:11px;letter-spacing:1px;color:var(--gold);background:rgba(201,160,99,.12);
  padding:3px 10px;border-radius:12px}
.tech-desc{font-size:14px;color:var(--text-weak);line-height:1.85;margin-bottom:20px}
.tech-cap{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.cap-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:16px 18px}
.cap-item h4{font-size:13px;color:var(--primary);font-weight:500;margin-bottom:6px;letter-spacing:.5px}
.cap-item p{font-size:13px;color:var(--text);line-height:1.7}
@media (max-width:992px){
  .tech-layer{grid-template-columns:1fr;padding:28px 24px}
  .tech-num{font-size:36px;justify-content:flex-start}
  .tech-cap{grid-template-columns:1fr}
}

/* =========================================================
   FAQ · 折叠式
   ========================================================= */
.faq-section{background:var(--bg)}
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  transition:box-shadow var(--t-base) var(--ease);overflow:hidden}
.faq-item:hover{box-shadow:var(--shadow)}
.faq-item summary{padding:20px 24px;font-size:15px;font-weight:500;color:var(--heading);
  cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;
  transition:color var(--t-fast)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--primary);font-weight:300;
  transition:transform var(--t-base)}
.faq-item[open] summary{color:var(--primary)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 24px 20px;font-size:14px;color:var(--text-weak);line-height:1.85}

/* =========================================================
   合作品牌卡片
   ========================================================= */
.client-row{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.client-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:22px 14px;
  text-align:center;transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease)}
.client-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.client-card span{display:block;font-size:15px;color:var(--heading);font-weight:500;margin-bottom:4px}
.client-card em{font-style:normal;font-size:11px;color:var(--text-mute);letter-spacing:.5px}
@media (max-width:992px){.client-row{grid-template-columns:repeat(3,1fr)}}
@media (max-width:480px){.client-row{grid-template-columns:repeat(2,1fr)}}

/* =========================================================
   白皮书领取区
   ========================================================= */
.whitepaper-section{background:linear-gradient(135deg,#0B1B33 0%,#10284F 55%,#123A70 100%);color:#fff}
.whitepaper-inner{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.whitepaper-text .sec-eyebrow{color:var(--gold)}
.whitepaper-text .sec-title{color:#fff}
.whitepaper-text .sec-title::after{background:var(--gold)}
.whitepaper-text p{color:rgba(255,255,255,.8);font-size:15px;line-height:1.85;margin-bottom:20px}
.whitepaper-text ul{list-style:none;padding:0}
.whitepaper-text li{font-size:14px;color:rgba(255,255,255,.88);padding:6px 0 6px 24px;position:relative}
.whitepaper-text li::before{content:"✓";position:absolute;left:0;color:var(--gold);font-weight:700}
.whitepaper-form .contact-form{background:#fff;border:none}
.whitepaper-form .check-label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-weak)}
.whitepaper-form .check-label a{color:var(--primary);text-decoration:underline}
@media (max-width:992px){.whitepaper-inner{grid-template-columns:1fr;gap:32px}}

/* =========================================================
   悬浮转化入口（右侧常驻）
   ========================================================= */
.float-cta{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:950;
  display:flex;flex-direction:column;gap:10px}
.float-btn{width:52px;height:52px;border-radius:50%;display:flex;flex-direction:column;
  align-items:center;justify-content:center;color:#fff;text-decoration:none;
  box-shadow:var(--shadow);transition:transform var(--t-fast) var(--ease),box-shadow var(--t-fast)}
.float-btn:hover{transform:scale(1.08);box-shadow:var(--shadow-hover)}
.float-btn svg{width:20px;height:20px}
.float-btn span{font-size:10px;margin-top:2px;letter-spacing:1px}
.float-wechat{background:#07C160}
.float-demo{background:var(--primary)}
.float-book{background:var(--gold);color:var(--navy)}
@media (max-width:768px){
  .float-cta{right:10px;gap:8px}
  .float-btn{width:44px;height:44px}
  .float-btn svg{width:17px;height:17px}
  .float-btn span{display:none}
}

/* =========================================================
   合作品牌跑马灯（自动横向滚动）
   ========================================================= */
.logo-marquee{overflow:hidden;position:relative;padding:20px 0;
  mask-image:linear-gradient(90deg,transparent 0%,#000 60px,#000 calc(100% - 60px),transparent 100%);
  -webkit-mask-image:linear-gradient(90deg,transparent 0%,#000 60px,#000 calc(100% - 60px),transparent 100%)}
.logo-marquee-track{display:flex;gap:16px;width:max-content;
  animation:marquee 28s linear infinite}
.logo-marquee-track:hover{animation-play-state:paused}
@keyframes marquee{
  0%{transform:translateX(0)}
  100%{transform:translateX(-50%)}
}
.logo-marquee .client-card{flex:0 0 auto;width:150px;min-width:140px;
  opacity:1 !important;transform:none !important;transition:box-shadow var(--t-base) var(--ease)}
.logo-marquee .client-card:hover{transform:none !important}
@media (prefers-reduced-motion:reduce){
  .logo-marquee-track{animation:none}
}

/* =========================================================
   案例精选
   ========================================================= */
.cases{background:#fff}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease)}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-thumb{height:190px;position:relative;display:grid;place-items:center;color:#fff;font-size:13px;letter-spacing:2px;
  background-color:var(--navy);background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1.5px);background-size:26px 26px}
.case-thumb.c1{background-color:#0B1B33}
.case-thumb.c2{background-color:#123A70}
.case-thumb.c3{background-color:#1D63C9}
.case-tag{position:absolute;left:16px;top:16px;background:rgba(0,0,0,.35);backdrop-filter:blur(4px);
  padding:4px 12px;border-radius:20px;font-size:12px;letter-spacing:0}
.case-body{padding:24px 26px}
.case-body h3{font-size:17px;color:var(--heading);font-weight:500;margin-bottom:10px;line-height:1.5}
.case-body p{font-size:14px;color:var(--text-weak);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.case-result{display:inline-block;margin-top:14px;font-size:13px;color:var(--primary);font-weight:500}

/* =========================================================
   资质荣誉
   ========================================================= */
.qual{background:var(--bg)}
.qual-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.qual-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:32px 26px;text-align:center;
  transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease)}
.qual-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.q-mark{width:54px;height:54px;margin:0 auto 16px;border-radius:50%;color:#fff;font-family:var(--serif);
  font-size:20px;display:grid;place-items:center;background:var(--navy);box-shadow:0 8px 20px rgba(11,27,51,.2)}
.qual-card h3{font-size:16px;color:var(--heading);font-weight:500;margin-bottom:8px}
.qual-card p{font-size:13px;color:var(--text-weak);line-height:1.7}

/* =========================================================
   新闻动态
   ========================================================= */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease)}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.news-thumb{height:160px;display:grid;place-items:center;color:#fff;font-size:13px;letter-spacing:2px;
  background-color:var(--navy);background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1.5px);background-size:24px 24px}
.news-thumb.n2{background-color:#123A70}
.news-thumb.n3{background-color:#1D63C9}
.news-date{font-size:12px;color:var(--text-mute)}
.news-body{padding:22px 24px}
.news-body h3{font-size:16px;color:var(--heading);font-weight:500;line-height:1.6;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(--text-weak);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 新闻卡可点击 */
.news-card-link{display:block;color:inherit;text-decoration:none}
.news-card-link .news-card{cursor:pointer}
.news-card-link:hover .news-card{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

/* =========================================================
   CTA 带
   ========================================================= */
.cta-band{background:var(--navy);color:#fff;text-align:center;padding:96px 24px;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:640px;height:640px;border-radius:50%;background:radial-gradient(circle,rgba(45,141,240,.16),transparent 62%)}
.cta-band h2{font-family:var(--serif);font-size:clamp(26px,3.4vw,42px);font-weight:500;margin-bottom:16px;position:relative;z-index:2}
.cta-band p{color:rgba(255,255,255,.75);margin-bottom:36px;font-size:16px;position:relative;z-index:2}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;position:relative;z-index:2}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{background:#081120;color:#9AA7BD;padding:72px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:44px}
.footer-brand .logo{color:#fff;margin-bottom:18px}
.footer-brand p{font-size:14px;line-height:1.9;opacity:.8;max-width:330px}
.footer-col h4{color:#fff;font-size:15px;font-weight:500;margin-bottom:18px;letter-spacing:1px}
.footer-col ul li{margin-bottom:12px}
.footer-col a{font-size:14px;opacity:.78;transition:.25s}
.footer-col a:hover{opacity:1;color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;opacity:.65}

/* 回到顶部 */
.to-top{position:fixed;right:24px;bottom:28px;width:48px;height:48px;border-radius:50%;background:var(--navy);color:#fff;
  display:grid;place-items:center;cursor:pointer;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:var(--t-base);z-index:900}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top svg{width:22px;height:22px}

/* 滚动入场 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* 二级页通用 */
.page-hero{background:var(--navy);color:#fff;padding:120px 0 72px;margin-top:var(--header-h);position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1.4px);background-size:30px 30px}
.page-hero h1{font-family:var(--serif);font-size:clamp(28px,3.6vw,44px);font-weight:500;margin-bottom:14px;position:relative;z-index:2}
.page-hero p{color:rgba(255,255,255,.78);max-width:640px;position:relative;z-index:2}
.page-section{padding:88px 0}
.placeholder-note{font-size:13px;color:var(--text-mute);background:#F1F4F9;border:1px dashed var(--line);
  border-radius:10px;padding:10px 16px;display:inline-block;margin-bottom:18px}
/* 表单 */
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:36px;box-shadow:var(--shadow)}
.contact-form .field{margin-bottom:18px}
.contact-form label{display:block;font-size:13px;color:var(--text-weak);margin-bottom:6px}
.contact-form input,.contact-form textarea{width:100%;padding:13px 16px;border:1px solid var(--line);
  border-radius:var(--r-sm);font-size:15px;font-family:inherit;transition:.25s;background:#FBFCFE}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--primary);background:#fff}
.contact-form textarea{resize:vertical;min-height:120px}
.form-note{font-size:13px;color:var(--gold);min-height:18px;margin-top:4px}
.contact-items{display:flex;flex-direction:column;gap:16px}
.contact-item{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);padding:18px 20px}
.contact-item .ic{width:44px;height:44px;border-radius:10px;background:#EFF5FE;color:var(--primary);
  display:grid;place-items:center;flex:0 0 44px}
.contact-item .ic svg{width:22px;height:22px}
.contact-item h4{font-size:15px;color:var(--heading);margin-bottom:2px;font-weight:500}
.contact-item p{font-size:14px;color:var(--text-weak)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}

/* =========================================================
   侧边客服入口（不弹窗）
   ========================================================= */
.side-contact{position:fixed;right:0;top:58%;transform:translateY(-50%);z-index:940;
  background:var(--navy);color:#fff;border-radius:10px 0 0 10px;padding:14px 10px;width:52px;
  display:flex;flex-direction:column;align-items:center;gap:6px;font-size:12px;letter-spacing:2px;
  box-shadow:var(--shadow);transition:width var(--t-base) var(--ease)}
.side-contact:hover{width:88px}
.side-contact svg{width:22px;height:22px}
.side-contact span{writing-mode:vertical-rl}

/* =========================================================
   发展历程时间轴（公司级）
   ========================================================= */
.tl{position:relative;max-width:900px;margin:0 auto;padding-left:0}
.tl::before{content:"";position:absolute;left:15px;top:8px;bottom:8px;width:1px;background:var(--line)}
.tl-item{position:relative;padding:0 0 44px 56px}
.tl-item:last-child{padding-bottom:8px}
.tl-dot{position:absolute;left:9px;top:4px;width:13px;height:13px;border-radius:50%;
  background:var(--gold);border:3px solid #fff;box-shadow:0 0 0 1px var(--line)}
.tl-year{font-size:13px;letter-spacing:2px;color:var(--gold);margin-bottom:6px}
.tl-body{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:18px 22px;
  transition:box-shadow var(--t-base) var(--ease)}
.tl-body:hover{box-shadow:var(--shadow)}
.tl-body h4{font-size:16px;color:var(--heading);font-weight:500;margin-bottom:6px}
.tl-body p{font-size:14px;color:var(--text-weak);line-height:1.8}

/* 数据口径注释 */
.data-note{font-size:12px;color:rgba(255,255,255,.5);margin-top:14px;text-align:left}
.data-note.dark{color:var(--text-mute);margin-top:16px}

/* 企业邮箱二维码占位 */
.qr-slot{margin-top:12px;width:96px;height:96px;border:1px dashed var(--line);border-radius:10px;
  display:grid;place-items:center;color:var(--text-mute);font-size:11px;text-align:center;line-height:1.6;
  background:#F8FAFD}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1024px){
  .sol-grid,.qual-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:992px){
  .biz-grid,.case-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:22px}
  .data-item{padding-left:18px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .two-col{grid-template-columns:1fr;gap:32px}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .page-section{padding:56px 0}
  .main-nav{position:fixed;top:var(--header-h);left:0;width:100%;height:calc(100vh - var(--header-h));
    background:#fff;transform:translateX(100%);transition:transform var(--t-base) var(--ease);
    padding:16px 20px;overflow-y:auto;box-shadow:var(--shadow);z-index:999}
  .main-nav.open{transform:translateX(0)}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0}
  .main-nav a{padding:14px 12px;border-bottom:1px solid var(--line);border-radius:0}
  .main-nav a.active::after{display:none}
  .nav-cta{text-align:center;margin-top:12px}
  .nav-toggle{display:flex}
  .hero{min-height:70vh}
  .hero-inner{padding:64px 0 72px}
  .hero-arrow{display:none}
  .hero-dots{bottom:24px}
  .hero-strip{display:none}
  .strip-inner{gap:12px 32px;padding:20px 0}
  .biz-grid,.case-grid,.news-grid,.sol-grid,.qual-grid{grid-template-columns:1fr}
  .data-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .to-top{bottom:28px}
  .cta-band{padding:64px 20px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:480px){
  .container{padding:0 18px}
  .data-grid{grid-template-columns:1fr}
  .data-item{border-left:none;border-top:1px solid rgba(255,255,255,.14);padding:14px 0 0}
}

/* =========================================================
   价格套餐
   ========================================================= */
.pricing-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-top:40px}
.price-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:36px 32px;
  display:flex;flex-direction:column;position:relative;transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease)}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.price-highlight{border-color:var(--gold);background:linear-gradient(180deg,#FFFDF6 0%,#fff 60%)}
.price-badge{position:absolute;top:18px;right:18px;background:var(--gold);color:var(--navy);
  font-size:12px;font-weight:700;padding:4px 14px;border-radius:var(--r-pill);letter-spacing:1px}
.price-tag{font-size:13px;letter-spacing:2px;color:var(--primary);text-transform:uppercase;font-weight:600}
.price-amount{margin:14px 0 8px;display:flex;align-items:baseline;gap:4px}
.price-unit{font-size:20px;color:var(--heading);font-weight:600}
.price-num{font-size:42px;color:var(--heading);font-weight:700;line-height:1;font-family:var(--serif)}
.price-period{font-size:14px;color:var(--text-weak)}
.price-desc{font-size:14px;color:var(--text-weak);margin-bottom:20px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.price-list{flex:1;margin-bottom:24px}
.price-list li{font-size:14px;color:var(--text);line-height:1.85;padding:6px 0;border-bottom:1px dashed rgba(0,0,0,.04)}
.price-list li:last-child{border-bottom:none}

/* =========================================================
   案例可点击
   ========================================================= */
.case-clickable{cursor:pointer;transition:transform var(--t-base) var(--ease),box-shadow var(--t-base) var(--ease)}
.case-clickable:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-clickable:focus-visible{outline:3px solid rgba(45,141,240,.55);outline-offset:2px}
.case-more{display:block;margin-top:12px;font-size:13px;color:var(--primary);font-weight:600}

/* =========================================================
   弹窗
   ========================================================= */
.modal{position:fixed;inset:0;z-index:9999;display:none;align-items:center;justify-content:center;padding:20px}
.modal.open{display:flex}
.modal-overlay{position:absolute;inset:0;background:rgba(11,27,51,.55);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.modal-card{position:relative;background:#fff;border-radius:var(--r-lg);padding:40px 36px;width:100%;max-width:420px;
  box-shadow:0 24px 80px rgba(11,27,51,.25);animation:modalIn .3s var(--ease)}
@keyframes modalIn{from{opacity:0;transform:translateY(20px) scale(.97)}to{opacity:1;transform:none}}
.modal-close{position:absolute;top:16px;right:16px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  background:transparent;border:none;cursor:pointer;border-radius:50%;color:var(--text-weak);transition:background var(--t-fast)}
.modal-close:hover{background:var(--bg)}
.modal-close svg{width:18px;height:18px}
.modal-card h3{font-size:22px;color:var(--heading);font-weight:600;margin-bottom:6px}
.modal-desc{font-size:14px;color:var(--text-weak);margin-bottom:24px}
.modal-form .field{margin-bottom:16px}
.modal-form label{display:block;font-size:13px;color:var(--text);margin-bottom:4px;font-weight:500}
.modal-form input[type="text"],.modal-form input[type="tel"]{
  width:100%;padding:10px 14px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:15px;
  font-family:var(--sans);transition:border-color var(--t-fast);background:#fff;color:var(--text)}
.modal-form input:focus{outline:none;border-color:var(--primary)}
.modal-form .check-label{display:flex;align-items:center;gap:8px;font-size:13px;cursor:pointer}
.modal-form .check-label a{color:var(--primary);text-decoration:underline}
.modal-form .form-note{font-size:12px;color:var(--text-mute);text-align:center;margin-top:12px}

/* =========================================================
   响应式补充
   ========================================================= */
@media (max-width:768px){
  .pricing-grid{grid-template-columns:1fr;gap:20px}
  .price-card{padding:28px 22px}
  .price-num{font-size:36px}
  .modal-card{padding:32px 24px;max-width:100%}
  .modal-card h3{font-size:20px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;
    transition-duration:.01ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}