/* DouBaoMKT.COM · homepage styles */
:root {
      --ink:#101828; --text:#344054; --muted:#667085; --line:rgba(51,112,255,.14);
      --blue:#3370ff; --violet:#8b5cf6; --cyan:#18c7ff; --mint:#27d6bd;
      --glass:rgba(255,255,255,.58); --white:#fff; --shadow:0 28px 80px rgba(51,112,255,.16);
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth;scroll-snap-type:y mandatory}
    body{
      min-width:320px;color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
      line-height:1.72;letter-spacing:0;overflow-x:hidden;
      background:linear-gradient(135deg,#f3f8ff 0%,#fff 32%,#f8f4ff 64%,#effcff 100%);
    }
    body:before{
      content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
      background:
        radial-gradient(circle at 16% 14%,rgba(51,112,255,.18),transparent 330px),
        radial-gradient(circle at 82% 20%,rgba(139,92,246,.14),transparent 340px),
        radial-gradient(circle at 72% 84%,rgba(24,199,255,.16),transparent 360px);
    }
    body:after{
      content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
      background-image:linear-gradient(rgba(51,112,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(51,112,255,.045) 1px,transparent 1px);
      background-size:72px 72px;mask-image:linear-gradient(#000,transparent 76%);
    }
    a{text-decoration:none;color:inherit} img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 44px));margin:0 auto}

    header{position:fixed;top:0;left:0;right:0;z-index:1000;background:transparent}
    .nav-shell{
      height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px;
      background:transparent;border:0;box-shadow:none;
    }
    .brand{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:900;color:#172033;white-space:nowrap}
    .brand img{width:36px;height:36px;border-radius:12px;object-fit:contain;background:#fff;box-shadow:0 10px 28px rgba(51,112,255,.16)}
    .brand span{color:var(--blue)}
    nav ul{display:flex;align-items:center;gap:4px;list-style:none;padding:7px;border:1px solid rgba(255,255,255,.68);border-radius:999px;background:rgba(255,255,255,.38);backdrop-filter:blur(18px)}
    nav a{display:inline-flex;align-items:center;min-height:36px;padding:0 13px;border-radius:999px;color:#475467;font-size:14px;font-weight:800;transition:.22s ease}
    nav a:hover{color:var(--blue);background:rgba(255,255,255,.72)}
    .menu-btn{display:none}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:999px;border:1px solid transparent;
      font-weight:900;line-height:1.2;white-space:nowrap;transition:.24s ease
    }
    .btn-primary{color:#fff;background:linear-gradient(135deg,var(--blue),var(--violet));box-shadow:0 16px 38px rgba(51,112,255,.3)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 48px rgba(51,112,255,.4)}
    .btn-ghost{color:#172033;background:rgba(255,255,255,.6);border-color:rgba(51,112,255,.15);backdrop-filter:blur(14px)}

    .screen{min-height:100vh;scroll-snap-align:start;display:flex;align-items:center;padding:104px 0 54px;position:relative;overflow:hidden}
    .section-title{max-width:780px;margin:0 auto 34px;text-align:center}
    .pill{display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;padding:8px 14px;border:1px solid rgba(51,112,255,.14);border-radius:999px;color:#3157d5;background:rgba(255,255,255,.62);box-shadow:0 10px 26px rgba(51,112,255,.08);font-size:13px;font-weight:900;backdrop-filter:blur(14px)}
    h1{max-width:790px;margin-bottom:24px;color:#101828;font-size:clamp(46px,6vw,82px);line-height:1.04;font-weight:950}
    h2{margin-bottom:14px;color:#111827;font-size:clamp(32px,4vw,52px);line-height:1.14;font-weight:950}
    .gradient-text{background:linear-gradient(100deg,var(--blue),var(--violet) 56%,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
    .lead{color:#475467;font-size:18px;line-height:1.9}
    .hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,500px);gap:58px;align-items:center;width:100%}
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 24px}
    .trust-row{display:flex;gap:10px;flex-wrap:wrap;color:#667085;font-size:14px;font-weight:800}
    .trust-row span{padding:8px 12px;border:1px solid rgba(51,112,255,.1);border-radius:999px;background:rgba(255,255,255,.54);backdrop-filter:blur(12px)}

    .avatar-stage{position:relative;min-height:520px;display:grid;place-items:center}
    .avatar-stage:before{
      content:"";position:absolute;width:min(460px,90%);aspect-ratio:1;border-radius:50%;
      background:conic-gradient(from 210deg,rgba(51,112,255,.72),rgba(24,199,255,.22),rgba(139,92,246,.5),rgba(51,112,255,.72));
      filter:blur(.2px);opacity:.45;animation:spin 24s linear infinite;
    }
    .avatar-stage:after{content:"";position:absolute;width:min(360px,72%);aspect-ratio:1;border-radius:50%;border:1px solid rgba(255,255,255,.78);background:rgba(255,255,255,.3);backdrop-filter:blur(18px)}
    .avatar-card{position:relative;z-index:1;width:min(300px,70vw);aspect-ratio:1;border-radius:36px;padding:30px;background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow);backdrop-filter:blur(22px);display:grid;place-items:center}
    .avatar-card img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 18px 28px rgba(51,112,255,.18))}
    .float-note{position:absolute;z-index:2;padding:12px 14px;border-radius:18px;background:rgba(255,255,255,.76);border:1px solid rgba(51,112,255,.12);box-shadow:0 14px 34px rgba(65,88,166,.12);backdrop-filter:blur(18px);color:#344054;font-size:14px;font-weight:900}
    .note-a{left:8%;top:18%}.note-b{right:4%;bottom:18%}.note-c{left:2%;bottom:28%}

    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{
      position:relative;overflow:hidden;border:1px solid rgba(51,112,255,.11);border-radius:24px;background:rgba(255,255,255,.68);
      box-shadow:0 16px 46px rgba(65,88,166,.1);backdrop-filter:blur(18px);transition:.24s ease
    }
    .card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(51,112,255,.22)}
    .feature-card{min-height:252px;padding:30px 26px}
    .line-icon{width:54px;height:54px;margin-bottom:18px;stroke:var(--blue);stroke-width:2.2;fill:none;stroke-linecap:round;stroke-linejoin:round}
    .card h3{margin-bottom:12px;color:#182230;font-size:20px;line-height:1.35;font-weight:950}
    .card p,.step p,.faq-answer p,footer p,footer li{color:#667085;font-size:15px}
    .stat-card{min-height:136px;padding:28px 18px;text-align:center}
    .stat-card strong{display:block;margin-bottom:8px;color:var(--blue);font-size:clamp(32px,4vw,48px);line-height:1;font-weight:950}
    .stat-card span{color:#475467;font-weight:900}

    .process-grid{display:grid;grid-template-columns:380px 1fr;gap:26px;align-items:center;width:100%}
    .process-copy{padding:34px}
    .steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .step{display:grid;grid-template-columns:54px 1fr;gap:16px;min-height:148px;padding:24px}
    .step-num{width:54px;height:54px;display:grid;place-items:center;border-radius:18px;color:#fff;background:linear-gradient(135deg,var(--blue),var(--violet));box-shadow:0 12px 28px rgba(51,112,255,.22);font-size:20px;font-weight:950}

    .tabs{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-bottom:28px}
    .tab{min-height:42px;padding:0 18px;border:1px solid rgba(51,112,255,.14);border-radius:999px;color:#475467;background:rgba(255,255,255,.62);box-shadow:0 8px 20px rgba(65,88,166,.08);font-weight:900;cursor:pointer;transition:.22s ease}
    .tab.active{color:#fff;border-color:transparent;background:linear-gradient(135deg,var(--blue),var(--violet))}
    .tab-panel{display:none}.tab-panel.active{display:block;animation:fade .35s ease both}
    .solution-card{min-height:188px;padding:28px 24px}
    .solution-card .line-icon{width:46px;height:46px}

    .case-card{background:rgba(255,255,255,.72)}
    .case-cover{height:150px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,rgba(51,112,255,.92),rgba(139,92,246,.78));font-size:38px;font-weight:950}
    .case-body{padding:22px}
    .tag{display:inline-flex;margin-bottom:12px;padding:4px 9px;border-radius:999px;color:var(--blue);background:rgba(51,112,255,.08);font-size:12px;font-weight:900}
    .case-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:16px;padding-top:16px;border-top:1px solid rgba(51,112,255,.12)}
    .case-stats strong{display:block;color:var(--blue);font-size:20px;line-height:1.1;font-weight:950}.case-stats span{color:#667085;font-size:12px}

    .faq-wrap{max-width:900px;margin:0 auto}
    .faq-item{margin-bottom:14px}
    .faq-question{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 24px;color:#182230;font-weight:950;cursor:pointer}
    .faq-toggle{flex:0 0 34px;width:34px;height:34px;display:grid;place-items:center;border-radius:50%;color:var(--blue);background:rgba(51,112,255,.1);font-size:22px;transition:.22s ease}
    .faq-answer{max-height:0;overflow:hidden;padding:0 24px;transition:.25s ease}
    .faq-item.active .faq-answer{max-height:420px;padding:0 24px 22px}.faq-item.active .faq-toggle{color:#fff;background:var(--blue);transform:rotate(45deg)}

    .cta-panel{width:100%;padding:72px 30px;border-radius:32px;text-align:center;color:#fff;background:linear-gradient(135deg,rgba(51,112,255,.96),rgba(139,92,246,.9));box-shadow:0 30px 90px rgba(51,112,255,.24)}
    .cta-panel h2{color:#fff}.cta-panel p{max-width:720px;margin:0 auto 28px;color:rgba(255,255,255,.84);font-size:17px}.cta-panel .btn{color:var(--blue);background:#fff}

    footer.screen{align-items:center;background:rgba(247,249,255,.72);border-top:1px solid rgba(51,112,255,.08)}
    .footer-grid{display:grid;grid-template-columns:1.3fr .9fr 1.2fr 1fr;gap:34px;margin-bottom:36px}
    footer h3{margin-bottom:16px;color:#182230;font-size:17px} footer ul{list-style:none} footer li{margin-bottom:9px} footer a{color:#667085} footer a:hover{color:var(--blue)}
    .qr{width:126px;height:126px;display:grid;place-items:center;margin:15px 0 10px;padding:3px;border:1px solid rgba(51,112,255,.1);border-radius:22px;background:#fff;box-shadow:0 12px 34px rgba(65,88,166,.1)}
    .qr img{width:120px;height:120px;object-fit:cover;border-radius:18px}
    .copyright{padding-top:22px;border-top:1px solid rgba(51,112,255,.1);color:#98a2b3;text-align:center;font-size:13px}.copyright img{display:inline-block;height:12px;padding-right:2px;vertical-align:-1px}

    @keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}} @keyframes spin{to{transform:rotate(360deg)}}
    @media(max-width:1080px){.hero-grid,.process-grid{grid-template-columns:1fr}.grid-3{grid-template-columns:repeat(2,1fr)}.grid-4,.footer-grid{grid-template-columns:repeat(2,1fr)}.avatar-stage{min-height:430px}}
    @media(max-width:768px){
      html{scroll-snap-type:none}.container{width:min(100% - 28px,1180px)}.screen{min-height:auto;padding:104px 0 64px}
      .nav-shell{height:64px}.brand{font-size:18px}.brand img{width:32px;height:32px}
      .menu-btn{width:42px;height:42px;display:grid;gap:5px;place-content:center;border:1px solid rgba(51,112,255,.14);border-radius:50%;background:rgba(255,255,255,.66);backdrop-filter:blur(14px);cursor:pointer}
      .menu-btn span,.menu-btn:before,.menu-btn:after{content:"";width:18px;height:2px;border-radius:999px;background:#1d2939}
      header nav{position:fixed;top:72px;left:14px;right:14px;padding:14px;border:1px solid rgba(51,112,255,.12);border-radius:24px;background:rgba(255,255,255,.94);box-shadow:var(--shadow);opacity:0;pointer-events:none;transform:translateY(-10px);transition:.22s ease}
      header.open nav{opacity:1;pointer-events:auto;transform:translateY(0)} nav ul{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;padding:0;border:0;background:transparent} nav a{justify-content:center;min-height:44px;background:rgba(51,112,255,.06)}
      .nav-shell>.btn{display:none}.hero-grid{gap:26px}.lead{font-size:16px}.hero-actions{display:grid;max-width:320px}.avatar-stage{min-height:330px}.float-note{display:none}.avatar-card{width:210px;border-radius:28px}
      .section-title{text-align:left}.grid-3,.grid-4,.steps,.footer-grid{grid-template-columns:1fr}.tabs{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;padding-bottom:8px}.tab{flex:0 0 auto}.case-stats{grid-template-columns:1fr}
    }
    @media(max-width:420px){nav ul{grid-template-columns:1fr}.btn{width:100%}h1{font-size:40px}.process-copy{padding:26px}.step{grid-template-columns:1fr}}

html {
      scroll-snap-type: none;
    }
    body {
      overflow-x: hidden;
    }
    .screen {
      min-height: 100svh;
      height: auto;
      overflow: visible;
      scroll-snap-align: none;
      padding-top: clamp(96px, 10vh, 128px);
      padding-bottom: clamp(64px, 8vh, 96px);
    }
    .screen > .container {
      width: min(1180px, calc(100% - 44px));
    }
    #features .grid-3,
    #solutions .grid-3,
    #cases .grid-3 {
      align-items: stretch;
    }
    .feature-card,
    .solution-card,
    .case-card {
      height: 100%;
    }
    .section-title {
      margin-bottom: clamp(24px, 4vh, 38px);
    }
    .hero-grid,
    .process-grid {
      min-height: calc(100svh - 220px);
    }
    .avatar-stage {
      min-height: min(520px, calc(100svh - 190px));
    }
    footer.screen {
      min-height: auto;
      display: block;
      padding-top: 78px;
      padding-bottom: 32px;
      overflow: visible;
    }
    .footer-grid {
      align-items: start;
    }
    @media (max-width: 1180px) {
      .grid-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
      .grid-4,
      .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
      .screen {
        min-height: auto;
      }
      .hero-grid,
      .process-grid {
        min-height: auto;
      }
    }
    @media (max-width: 768px) {
      .screen {
        min-height: auto;
        padding-top: 96px;
        padding-bottom: 58px;
      }
      .grid-3,
      .grid-4,
      .steps,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .avatar-stage {
        min-height: 320px;
      }
      footer.screen {
        padding-top: 64px;
      }
    }

html {
      scroll-snap-type: none !important;
      scroll-padding-top: 86px;
    }
    .screen {
      min-height: auto !important;
      display: block;
      padding-top: 92px !important;
      padding-bottom: 92px !important;
      overflow: visible !important;
      scroll-snap-align: none !important;
    }
    #home.screen {
      padding-top: 132px !important;
      padding-bottom: 82px !important;
    }
    .hero-grid,
    .process-grid {
      min-height: auto !important;
    }
    .avatar-stage {
      min-height: 420px !important;
    }
    footer.screen {
      padding-top: 68px !important;
      padding-bottom: 30px !important;
    }
    @media (max-width: 768px) {
      .screen {
        padding-top: 66px !important;
        padding-bottom: 66px !important;
      }
      #home.screen {
        padding-top: 108px !important;
        padding-bottom: 56px !important;
      }
      .avatar-stage {
        min-height: 280px !important;
      }
    }

:root {
      --blue: #4f7dff;
      --violet: #9b7cff;
      --cyan: #6edcff;
      --ink: #142033;
      --muted: #6b7280;
    }
    body {
      background:
        radial-gradient(circle at 14% 8%, rgba(79,125,255,.11), transparent 340px),
        radial-gradient(circle at 86% 12%, rgba(155,124,255,.09), transparent 360px),
        linear-gradient(135deg, #f8fbff 0%, #ffffff 38%, #fbf9ff 72%, #f6fdff 100%) !important;
    }
    body:before {
      opacity: .72;
    }
    nav a {
      font-size: 16px !important;
      font-weight: 400 !important;
      color: #344054 !important;
      letter-spacing: 0 !important;
    }
    .brand {
      font-weight: 700 !important;
    }
    .screen {
      padding-top: 86px !important;
      padding-bottom: 86px !important;
    }
    #home.screen {
      padding-top: 124px !important;
      padding-bottom: 74px !important;
    }
    .lead {
      color: #526071 !important;
    }
    .card,
    .avatar-card,
    .float-note,
    .cta-panel {
      box-shadow: 0 18px 52px rgba(79, 125, 255, .10) !important;
    }
    .card {
      background: rgba(255,255,255,.78) !important;
      border-color: rgba(79,125,255,.10) !important;
    }
    .pill {
      color: #4966d6 !important;
      background: rgba(255,255,255,.72) !important;
      border-color: rgba(79,125,255,.12) !important;
    }
    .case-marquee {
      position: relative;
      overflow: hidden;
      padding: 6px 0 18px;
      mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
    }
    .case-track {
      display: flex;
      gap: 18px;
      width: max-content;
      animation: caseScroll 36s linear infinite;
    }
    .case-marquee:hover .case-track {
      animation-play-state: paused;
    }
    .case-card {
      width: 350px;
      flex: 0 0 350px;
      min-height: 360px;
      background: rgba(255,255,255,.82) !important;
    }
    .case-cover {
      height: 128px !important;
      background:
        linear-gradient(135deg, rgba(79,125,255,.88), rgba(155,124,255,.72)),
        radial-gradient(circle at 78% 22%, rgba(110,220,255,.45), transparent 160px) !important;
      font-size: 30px !important;
    }
    .case-body {
      padding: 22px !important;
    }
    .case-body h3 {
      font-size: 20px;
    }
    .case-body p {
      min-height: 76px;
    }
    .case-stats strong {
      color: #4f7dff !important;
    }
    @keyframes caseScroll {
      from { transform: translateX(0); }
      to { transform: translateX(-50%); }
    }
    @media (max-width: 768px) {
      nav a {
        font-size: 15px !important;
      }
      .case-marquee {
        overflow-x: auto;
        mask-image: none;
        padding-bottom: 10px;
      }
      .case-track {
        animation: none;
      }
      .case-card {
        width: 286px;
        flex-basis: 286px;
      }
    }

.brand{gap:10px!important;text-transform:none!important}
.brand-copy{display:grid;line-height:1.08;white-space:nowrap}
.brand-copy b{color:#3370ff;font-size:20px;font-weight:700;letter-spacing:0}
.brand-copy small{margin-top:5px;color:#98a2b3;font-size:9px;font-weight:500;letter-spacing:0}
@media(max-width:620px){.brand-copy b{font-size:17px}.brand-copy small{max-width:190px;overflow:hidden;text-overflow:ellipsis;font-size:8px}}


/* 首页：豆包AI推广循环SOP */
#process .sop-heading{max-width:720px;margin:0 auto 24px;text-align:center}
#process .sop-heading .lead{margin-right:auto;margin-left:auto}
.sop-cycle{position:relative;width:min(920px,100%);height:650px;margin:0 auto}
.sop-ring{position:absolute;inset:72px 155px;border:2px dashed rgba(51,112,255,.28);border-radius:50%;background:radial-gradient(circle,rgba(51,112,255,.07) 0,rgba(139,92,246,.035) 41%,transparent 42%)}
.sop-ring span,.sop-ring i,.sop-ring b{position:absolute;width:18px;height:18px;border-top:4px solid #3370ff;border-right:4px solid #3370ff;transform:rotate(45deg)}
.sop-ring span{right:40px;top:55px;transform:rotate(76deg)}
.sop-ring i{right:42px;bottom:52px;transform:rotate(148deg)}
.sop-ring b{left:31px;bottom:72px;transform:rotate(222deg)}
.sop-node{position:absolute;z-index:2;width:224px;min-height:116px;display:flex;align-items:flex-start;gap:14px;padding:20px;border:1px solid rgba(51,112,255,.15);border-radius:22px;background:rgba(255,255,255,.96);box-shadow:0 16px 46px rgba(51,112,255,.1)}
.sop-node>span{flex:0 0 40px;height:40px;display:grid;place-items:center;border-radius:13px;color:#fff;background:linear-gradient(135deg,#3370ff,#8b5cf6);font-size:13px;font-weight:900}
.sop-node h3{margin:1px 0 5px;font-size:18px}
.sop-node p{margin:0;color:#667085;font-size:13px;line-height:1.6}
.sop-node-1{left:50%;top:0;transform:translateX(-50%)}
.sop-node-2{right:0;top:130px}
.sop-node-3{right:26px;bottom:88px}
.sop-node-4{left:50%;bottom:0;transform:translateX(-50%)}
.sop-node-5{left:26px;bottom:88px}
.sop-node-6{left:0;top:130px}
.sop-center{position:absolute;left:50%;top:50%;z-index:1;width:230px;height:230px;display:flex;flex-direction:column;align-items:center;justify-content:center;transform:translate(-50%,-50%);border:1px solid rgba(51,112,255,.14);border-radius:50%;background:#fff;box-shadow:0 20px 60px rgba(51,112,255,.13);text-align:center}
.sop-center small{margin-bottom:9px;color:#3370ff;font-size:13px;font-weight:900;letter-spacing:.16em}
.sop-center strong{color:#172033;font-size:21px;line-height:1.55}
.sop-center em{margin-top:8px;color:#98a2b3;font-size:12px;font-style:normal}
.sop-loop-note{max-width:650px;display:flex;align-items:center;justify-content:center;gap:14px;margin:10px auto 0;padding:14px 20px;border-radius:16px;color:#526079;background:#f5f8ff;font-size:14px;text-align:center}
.sop-loop-note strong{color:#3370ff;white-space:nowrap}
@media(max-width:820px){.sop-cycle{height:auto;display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}.sop-ring{display:none}.sop-node{position:static;width:auto;min-height:112px;transform:none}.sop-center{position:static;grid-column:1/-1;width:100%;height:auto;min-height:150px;transform:none;border-radius:24px}.sop-center strong br{display:none}}
@media(max-width:560px){.sop-cycle{grid-template-columns:1fr}.sop-node{min-height:0}.sop-center{grid-column:auto;order:7}.sop-loop-note{align-items:flex-start;flex-direction:column;gap:3px;text-align:left}}