/* ============================================================
 * DDONE 公共样式表 common.css  (清爽蓝白科技风 v2)
 * 纯白底 · 高饱和蓝紫 · 玻璃态 · 霓虹质感 · 科技网格
 * ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  --bg-1:#ffffff;               /* 纯白背景 */
  --bg-2:#ffffff;               /* 区块白（同纯白，统一明亮） */
  --bg-3:#f1f5f9;               /* 浅灰背景 */
  --primary:#2563eb;            /* 鲜亮蓝（主色调） */
  --primary-2:#0ea5e9;          /* 天蓝 */
  --primary-3:#7c3aed;          /* 鲜明紫 */
  --primary-4:#06b6d4;          /* 青色 */
  --accent:#f59e0b;             /* 活力橙 */
  --text:#0f172a;               /* 深蓝黑（高对比主文字） */
  --text-2:#475569;             /* 次文本（深灰） */
  --text-3:#64748b;             /* 弱文本（中灰，可读性增强） */
  --card-bg:#ffffff;             /* 卡片纯白 */
  --card-border:#e2e8f0;         /* 浅灰边框 */
  --shadow:0 4px 24px rgba(37,99,235,0.08);
  --shadow-hover:0 16px 48px rgba(37,99,235,0.16);
  --shadow-blue:0 8px 32px rgba(37,99,235,0.18);
}

/* ---------- 全局背景（纯净白底 + 精细蓝紫渐变装饰） ---------- */
body{
  background:
    radial-gradient(ellipse 90% 50% at 15% 0%, rgba(37,99,235,0.06), transparent 50%),
    radial-gradient(ellipse 70% 40% at 85% 5%, rgba(14,165,233,0.05), transparent 50%),
    radial-gradient(ellipse 60% 35% at 50% 100%, rgba(124,58,237,0.04), transparent 50%),
    var(--bg-1);
  background-attachment:fixed;
  color:var(--text);
  overflow-x:hidden;
  line-height:1.6;
}

/* 精细科技感网格（极轻极细） */
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(37,99,235,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.04) 1px, transparent 1px);
  background-size:60px 60px;
  pointer-events:none;
  z-index:0;
}

/* 顶部彩色光带（更鲜明） */
body::after{
  content:"";
  position:fixed;
  top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg, var(--primary), var(--primary-2), var(--primary-3), var(--primary), var(--primary-2), var(--primary-4));
  background-size:300% 100%;
  -webkit-animation:flow 10s linear infinite;
  animation:flow 10s linear infinite;
  z-index:1000;
}
@-webkit-keyframes flow{0%{background-position:0% 0}100%{background-position:300% 0}}
@keyframes flow{0%{background-position:0% 0}100%{background-position:300% 0}}

::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg-3)}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--primary),var(--primary-3));border-radius:4px}
a{color:inherit;text-decoration:none}

/* 让所有内容层叠在背景之上 */
header,section,footer,.float-tool,.breadcrumb-bar,.page-banner{position:relative;z-index:1}

/* ---------- 顶部导航 ---------- */
header{
  position:fixed;top:0;width:100%;z-index:999;
  background:rgba(255,255,255,0.95);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--card-border);
  transition:all .35s ease;
  box-shadow:0 2px 20px rgba(37,99,235,0.06);
}
header.scrolled{
  background:rgba(255,255,255,0.98);
  border-bottom-color:var(--card-border);
  box-shadow:0 4px 30px rgba(37,99,235,0.1);
}
.nav-wrap{max-width:1400px;margin:0 auto;padding:0 30px;height:70px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;transition:transform .3s}
.logo:hover{transform:translateY(-2px)}
.logo-text{
  font-size:26px;font-weight:bold;letter-spacing:2px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.logo-sub{font-size:12px;color:var(--text-2)}
.nav-list{display:flex;gap:20px;align-items:center;flex-wrap:nowrap}
.nav-list>a{color:var(--text);font-size:15px;transition:0.3s;padding:6px 2px;position:relative;white-space:nowrap}
.nav-list>a:hover{color:var(--primary)}
.nav-list>a.active{color:var(--primary);font-weight:600}
.nav-list>a.active::after,.nav-list>a:hover::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));
  border-radius:2px;
}
.nav-list>a.active::after{content:""}
.nav-list .nav-group{position:relative;    margin-top: 12px;padding-bottom:10px;white-space:nowrap}
.nav-list .nav-group::after{
  content:"";position:absolute;bottom:0;left:0;right:0;height:15px;background:transparent;
}
.nav-list .nav-group>a::after{content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;margin-left:6px;font-size:11px;opacity:0.5}
.nav-dropdown{
  position:absolute;top:calc(100% - 10px);left:0;min-width:200px;
  background:#fff;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--card-border);border-radius:14px;padding:8px 0;
  display:none;flex-direction:column;gap:2px;margin-top:0;z-index:1000;
  box-shadow:0 16px 48px rgba(37,99,235,0.12);
  opacity:0;transform:translateY(-6px);transition:opacity .25s,transform .25s;
}
.nav-group:hover .nav-dropdown{display:flex;opacity:1;transform:translateY(0)}
.nav-dropdown a{padding:10px 18px;color:var(--text-2);font-size:14px;transition:0.2s;white-space:nowrap;border-left:3px solid transparent}
.nav-dropdown a:hover{background:rgba(37,99,235,0.06);color:var(--primary);border-left-color:var(--primary);padding-left:22px}
.nav-btn-group{display:flex;gap:12px}
.nav-toggle{display:none;font-size:22px;color:var(--primary);cursor:pointer;background:none;border:none}

/* ---------- 通用按钮 ---------- */
.btn-blue{
  padding:10px 24px;color:#fff;border:none;border-radius:10px;cursor:pointer;transition:0.3s;font-size:14px;font-weight:600;
  background:linear-gradient(135deg,var(--primary),#1d4ed8);
  box-shadow:0 4px 16px rgba(37,99,235,0.35);
}
.btn-blue::after{
  content:"";position:absolute;top:0;left:-120%;width:100%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.4),transparent);
  transition:left .6s;
}
.btn-blue:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(37,99,235,0.45)}
.btn-blue:hover::after{left:120%}
.btn-stroke{
  padding:10px 24px;border:2px solid var(--primary);background:transparent;color:var(--primary);
  border-radius:10px;cursor:pointer;transition:0.3s;font-size:14px;font-weight:600;
}
.btn-stroke:hover{background:var(--primary);color:#fff;box-shadow:0 6px 20px rgba(37,99,235,0.3);transform:translateY(-2px)}

/* ---------- 通用区块 ---------- */
section{max-width:1400px;margin:0 auto;padding:110px 30px}
section::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:62%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(37,99,235,0.2),transparent);
}
section:first-of-type::before{display:none}
.sec-title{text-align:center;margin-bottom:64px}
.sec-title h2{
  font-size:36px;margin-bottom:14px;
  background:linear-gradient(135deg,var(--text) 0%,var(--primary) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  letter-spacing:1px;
  font-weight:800;
}
.sec-title p{color:var(--text-2);font-size:15px;letter-spacing:0.5px}

/* ---------- 页面横幅 ---------- */
.page-banner{
  padding:150px 30px 80px;text-align:center;position:relative;overflow:hidden;
  background:
    radial-gradient(circle at 50% 0%, rgba(37,99,235,0.1), transparent 60%),
    radial-gradient(circle at 20% 30%, rgba(14,165,233,0.07), transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(124,58,237,0.06), transparent 50%),
    var(--bg-1);
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(37,99,235,0.12) 1px, transparent 1px);
  background-size:40px 40px;opacity:0.35;
}
.page-banner::after{
  content:"";position:absolute;left:50%;top:15%;transform:translateX(-50%);
  width:600px;height:400px;border-radius:50%;
  background:radial-gradient(ellipse, rgba(37,99,235,0.08), transparent 70%);
  filter:blur(40px);pointer-events:none;
}
.page-banner h1{
  font-size:50px;letter-spacing:5px;margin-bottom:16px;position:relative;z-index:1;
  color:var(--text);font-weight:800;
}
.page-banner h1 span{
  background:linear-gradient(135deg,var(--primary),var(--primary-2) 50%,var(--primary-3));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  -webkit-animation:glowPulse 3s ease-in-out infinite;
  animation:glowPulse 3s ease-in-out infinite;
}
@-webkit-keyframes glowPulse{0%,100%{filter:drop-shadow(0 0 8px rgba(37,99,235,0.3))}50%{filter:drop-shadow(0 0 16px rgba(14,165,233,0.5))}}
@keyframes glowPulse{0%,100%{filter:drop-shadow(0 0 8px rgba(37,99,235,0.3))}50%{filter:drop-shadow(0 0 16px rgba(14,165,233,0.5))}}
.page-banner .crumb{font-size:13px;color:var(--text-2);margin-bottom:20px;position:relative;z-index:1}
.page-banner .crumb a:hover{color:var(--primary)}
.page-banner p.subtitle{font-size:18px;color:var(--text-2);max-width:780px;margin:0 auto;line-height:1.8;position:relative;z-index:1}

/* ---------- 通用网格 ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid-5{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;padding-left:6px}

/* ---------- 卡片（清爽亮白+亮蓝边框光效） ---------- */
.card{
  border:1px solid var(--card-border);
  padding:32px;border-radius:18px;
  background:var(--card-bg);
  box-shadow:var(--shadow);
  transition:transform .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s,border-color .35s;
  position:relative;overflow:hidden;
}
/* 卡片顶部蓝色光带（亮蓝渐变） */
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2),var(--primary-3));
  opacity:0;transition:opacity .35s;
}
/* 鼠标悬停时蓝色光晕扩散 */
.card::after{
  content:"";position:absolute;inset:0;border-radius:18px;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%), rgba(37,99,235,0.08), transparent 50%);
  opacity:0;transition:opacity .35s;pointer-events:none;
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(37,99,235,0.3);
}
.card:hover::before{opacity:1}
.card:hover::after{opacity:1}
.card i{
  font-size:36px;color:var(--primary);margin-bottom:18px;display:block;
  transition:transform .35s;
}
.card:hover i{transform:scale(1.12) translateX(4px) translateY(-2px)}
.card h4{font-size:19px;margin-bottom:12px;color:var(--text);font-weight:700}
.card p{color:var(--text-2);line-height:1.75;font-size:14px}
.card .tag{
  display:inline-block;font-size:12px;color:var(--primary);border:1px solid rgba(37,99,235,0.25);
  padding:2px 10px;border-radius:20px;margin-bottom:10px;
  background:rgba(37,99,235,0.06);font-weight:600;
}

/* ---------- 大号按钮 ---------- */
.btn-primary-l{
  display:inline-block;padding:14px 36px;color:#fff;border-radius:12px;font-size:15px;font-weight:700;
  background:linear-gradient(135deg,var(--primary),#1d4ed8);
  border:none;cursor:pointer;position:relative;overflow:hidden;
  box-shadow:0 6px 24px rgba(37,99,235,0.35);transition:transform .3s,box-shadow .3s;
}
.btn-primary-l::after{
  content:"";position:absolute;top:0;left:-120%;width:100%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.4),transparent);transition:left .6s;
}
.btn-primary-l:hover{transform:translateY(-3px);box-shadow:0 10px 32px rgba(37,99,235,0.45)}
.btn-primary-l:hover::after{left:120%}
.btn-ghost-l{
  display:inline-block;padding:14px 36px;border:2px solid var(--primary);color:var(--primary);
  border-radius:12px;font-size:15px;font-weight:700;background:transparent;cursor:pointer;transition:.3s;
}
.btn-ghost-l:hover{background:var(--primary);color:#fff;box-shadow:0 8px 24px rgba(37,99,235,0.3);transform:translateY(-3px)}

/* ---------- 信息块 ---------- */
.info-item{
  padding:22px 26px;border-left:4px solid var(--primary);
  background:rgba(37,99,235,0.04);
  margin-bottom:20px;border-radius:0 14px 14px 0;
  transition:transform .3s,box-shadow .3s;
}
.info-item:hover{transform:translateX(8px);box-shadow:0 8px 28px rgba(37,99,235,0.1)}
.info-item h4{font-size:18px;margin-bottom:8px;color:var(--text);font-weight:700}
.info-item p{color:var(--text-2);font-size:14px;line-height:1.75}

/* ---------- 表格 ---------- */
.table-box{
  border:1px solid var(--card-border);border-radius:16px;overflow:hidden;
  background:#fff;
  box-shadow:var(--shadow);
}
table{width:100%;border-collapse:collapse}
th,td{padding:18px 24px;border-bottom:1px solid var(--card-border);text-align:left}
th{background:rgba(37,99,235,0.05);color:var(--primary);font-weight:700;letter-spacing:0.5px;font-size:14px}
td{color:var(--text);font-size:14px}
tr{transition:background .25s}
tr:hover td{background:rgba(37,99,235,0.03)}
tr:last-child td{border:none}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:32px;border-left:2px solid var(--card-border)}
.tl-item{margin-bottom:34px;position:relative}
.tl-item::before{
  content:"";position:absolute;left:-39px;top:6px;width:14px;height:14px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,0.15);
}
.tl-item .tl-date{font-size:13px;color:var(--primary);margin-bottom:6px;letter-spacing:0.5px;font-weight:600}
.tl-item h4{font-size:17px;margin-bottom:6px;color:var(--text);font-weight:700}
.tl-item p{color:var(--text-2);font-size:14px;line-height:1.75}

/* ---------- 面包屑条 ---------- */
.breadcrumb-bar{padding-top:90px;background:var(--bg-1);border-bottom:1px solid var(--card-border)}
.breadcrumb-bar .inner{max-width:1400px;margin:0 auto;padding:18px 30px;font-size:13px;color:var(--text-2)}
.breadcrumb-bar .inner a:hover{color:var(--primary)}
.breadcrumb-bar .inner span{margin:0 8px;color:var(--text-3)}

/* ---------- 页脚 ---------- */
footer{
  border-top:1px solid var(--card-border);padding:70px 30px 30px;position:relative;
  background:var(--bg-1);
}
footer::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:82%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(37,99,235,0.25),transparent);
}
.footer-wrap{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:32px}
.foot-logo h3{
  font-size:24px;margin-bottom:10px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800;
}
.foot-logo p{color:var(--text-2);font-size:14px;line-height:1.85}
.foot-title{font-size:16px;margin-bottom:18px;color:var(--text);position:relative;padding-left:14px;font-weight:700}
.foot-title::before{content:"";position:absolute;left:0;top:6px;width:4px;height:16px;background:linear-gradient(var(--primary),var(--primary-2));border-radius:2px}
.foot-item{margin-bottom:11px;color:var(--text-2);font-size:14px;transition:0.3s;cursor:pointer}
.foot-item:hover{color:var(--primary);transform:translateX(4px)}
.foot-social{display:flex;gap:12px;margin-top:16px}
.foot-social i{
  width:38px;height:38px;border:1px solid var(--card-border);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:var(--primary);
  transition:0.3s;cursor:pointer;
}
.foot-social i:hover{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;border-color:var(--primary);transform:translateY(-3px)}
.copyright{
  max-width:1400px;margin:40px auto 0;padding-top:20px;border-top:1px solid var(--card-border);
  text-align:center;color:var(--text-3);font-size:13px;display:flex;flex-wrap:wrap;
  justify-content:center;align-items:center;gap:8px 16px;
}
.copyright-text{color:var(--text-3)}
.copyright-links{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px 16px}
.copyright a{
  display:inline-flex;align-items:center;gap:5px;color:var(--text-3);text-decoration:none;
  transition:color .2s;
}
.copyright a:hover{color:var(--primary)}
.icp-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:16px;height:16px;border:1px solid currentColor;border-radius:3px;font-size:8px;font-weight:700;
  line-height:1;padding-bottom:1px;
}
.ga-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:14px;height:14px;border:1px solid currentColor;border-radius:2px;
  background:transparent;font-size:8px;font-weight:700;line-height:1;
}

/* ---------- 侧边悬浮按钮 ---------- */
.float-tool{position:fixed;right:30px;bottom:60px;display:flex;flex-direction:column;gap:14px;z-index:998}
.float-btn{
  width:50px;height:50px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  display:flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;
  box-shadow:0 6px 24px rgba(37,99,235,0.4);transition:0.3s;border:none;position:relative;
}
.float-btn::before{
  content:"";position:absolute;inset:-4px;border-radius:50%;border:2px solid var(--primary);
  opacity:0;-webkit-animation:ripple 2s infinite;animation:ripple 2s infinite;
}
@-webkit-keyframes ripple{0%{transform:scale(1);opacity:0.5}100%{transform:scale(1.45);opacity:0}}
@keyframes ripple{0%{transform:scale(1);opacity:0.5}100%{transform:scale(1.45);opacity:0}}
.float-btn:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 10px 32px rgba(37,99,235,0.5)}
.float-btn a{color:#fff}
.float-popup{
  position:absolute;right:64px;bottom:0;background:#fff;border-radius:12px;
  box-shadow:0 8px 32px rgba(0,0,0,0.15);padding:16px;text-align:center;
  display:none;min-width:180px;
}
.float-popup.show{display:block}
.float-popup::after{
  content:"";position:absolute;right:-10px;bottom:15px;
  border:10px solid transparent;border-left-color:#fff;
}
.float-popup p{color:var(--text);font-size:13px;margin:0 0 10px;font-weight:600}
.float-popup img{width:150px;height:150px;border-radius:8px}

/* ---------- 滚动渐入动画（无障碍：JS 未启用时元素默认可见） ---------- */
.reveal{opacity:1}
.js-ready .reveal{opacity:0;transform:translateY(34px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.js-ready .reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px){
  .grid-5{grid-template-columns:repeat(3,1fr);padding-left:0}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .footer-wrap{grid-template-columns:1fr 1fr}
  section{padding:80px 30px}
}
@media (max-width: 768px){
  .nav-list{display:none}
  .nav-toggle{display:block}
  .nav-list.open{display:flex;flex-direction:column;position:absolute;top:70px;left:0;right:0;background:#fff;padding:20px;gap:16px;border-bottom:1px solid var(--card-border);box-shadow:0 10px 30px rgba(0,0,0,0.08)}
  .nav-list.open .nav-dropdown{position:static;display:flex;margin-top:6px;opacity:1;transform:none}
  .nav-btn-group{display:none}
  section{padding:60px 20px}
  .sec-title h2{font-size:26px}
  .page-banner{padding:120px 20px 60px}
  .page-banner h1{font-size:32px;letter-spacing:2px}
  .page-banner::after{width:320px;height:320px}
  .footer-wrap{grid-template-columns:1fr;gap:30px}
  .grid-5,.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
}

/* ---------- 减少动画偏好（无障碍） ---------- */
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
  .js-ready .reveal{opacity:1;transform:none}
}