/* ===== 设计 Token ===== */
:root{
  --navy-950:#071630;
  --navy-900:#0A1F45;
  --navy-850:#0C2652;
  --navy-800:#0E2E5F;
  --navy-700:#123D8F;
  --navy-600:#164BAE;
  --blue-600:#1F6FFF;
  --blue-500:#3D8BFF;
  --cyan-400:#4FB8FF;
  --light:#F5F8FE;
  --light-2:#EBF2FC;
  --orange:#FF8A3D;
  --orange-deep:#F0762A;
  --ink:#0F2447;
  --ink-2:#54657F;
  --ink-3:#8595AC;
  --white:#FFFFFF;
  --line:rgba(15,36,71,.10);
  --line-dark:rgba(255,255,255,.14);
  --dot-red:#FF5A5A;
  --dot-yellow:#FFC53D;
  --dot-green:#3DD68C;
  --dot-blue:#3D8BFF;
  --r-lg:20px;
  --r-md:14px;
  --shadow-card:0 10px 34px rgba(10,31,69,.08);
  --shadow-deep:0 18px 50px rgba(7,22,48,.32);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:100%;}
body{font-family:var(--font);color:var(--ink);background:var(--light);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
::selection{background:rgba(31,111,255,.22)}

.container{max-width:80rem;margin:0 auto;padding:0 28px}
.section{padding:104px 0}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.22em;color:var(--blue-600);text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--blue-600);border-radius:2px}
.section.dark .eyebrow{color:var(--cyan-400)}
.section.dark .eyebrow::before{background:var(--cyan-400)}
.h2{font-size:clamp(28px,3.4vw,40px);font-weight:800;line-height:1.28;letter-spacing:.01em;margin:18px 0 18px;color:#fff;}
.h2 .accent{position:relative;color:var(--blue-600);white-space:nowrap}
.h2 .accent::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:10px;background:rgba(31,111,255,.14);z-index:-1}
.section.dark .h2 .accent{color:var(--cyan-400)}
.section.dark .h2 .accent::after{background:rgba(79,184,255,.16)}
.lead{font-size:17px;color:var(--ink-2);max-width:760px}
.section.dark .lead{color:rgba(255,255,255,.72)}
.sec-head{margin-bottom:56px}

/* 波形签名元素 */
.wave{display:flex;align-items:center;gap:4px}
.wave i{width:4px;border-radius:2px;background:currentColor;display:block}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px 30px;border-radius:999px;font-size:16px;font-weight:600;transition:transform .2s ease,box-shadow .2s ease,background .2s ease;min-height:52px}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 10px 24px rgba(255,138,61,.32)}
.btn-primary:hover{background:var(--orange-deep);color: #fff;}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.32)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.btn-blue{background:var(--blue-600);color:#fff;box-shadow:0 10px 24px rgba(31,111,255,.3)}
.btn-blue:hover{background:var(--navy-700)}

/* ===== 顶栏 ===== */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .25s ease}
.header.scrolled{box-shadow:0 6px 24px rgba(10,31,69,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:12px}
.brand>div{display:flex;flex-direction:column;gap:4px;}
.brand-logo{height:40px!important;}
.brand-name{font-size:18px;font-weight:bold;letter-spacing:.02em;color:var(--navy-900);line-height:1.1}
.brand-tag{width: 40px;color: var(--navy-700);background: var(--light-2);border: 1px solid rgba(31,111,255,.16);border-radius: 999px;align-items: center;min-height: 16px;padding: 1px 7px;font-size: 10px;font-weight: 900;line-height: 1;display: inline-flex;}
.nav{display:flex;align-items:center;gap:34px}
.nav a{font-size:15px;font-weight:500;color:var(--ink);position:relative;padding:6px 0}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--blue-600);border-radius:2px;transition:width .25s ease}
.nav a:hover{color:var(--blue-600)}
.nav a:hover::after{width:100%}
.header-right{display:flex;align-items:center;gap:22px}
.phone{display:flex;align-items:center;gap:9px;font-weight:700;font-size:16px;color:var(--navy-800)}
.phone svg{color:var(--blue-600)}
.menu-btn{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);align-items:center;justify-content:center;color:var(--ink)}

/* ===== Hero ===== */
.hero{position:relative;background:radial-gradient(1100px 620px at 82% -10%,rgba(31,111,255,.34),transparent 60%),radial-gradient(900px 520px at -8% 110%,rgba(79,184,255,.18),transparent 55%),linear-gradient(160deg,var(--navy-950) 0%,var(--navy-900) 42%,var(--navy-800) 100%);color:#fff;overflow:hidden;padding:96px 0 0}
.hero-wave{position:absolute;inset:0;pointer-events:none;opacity:.5}
.hero-wave .wave{position:absolute;color:rgba(255,255,255,.05)}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;padding-bottom:56px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;border-radius:999px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.07);font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--cyan-400)}
.hero-eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--dot-green);box-shadow:0 0 0 4px rgba(61,214,140,.2)}
.hero h1{font-size:clamp(34px,4.6vw,56px);font-weight:800;line-height:1.2;letter-spacing:.01em;margin:26px 0 22px;color:#fff;}
.hero h1 .hl{color:transparent;background:linear-gradient(92deg,var(--cyan-400),var(--blue-500));-webkit-background-clip:text;background-clip:text}
.hero-sub{font-size:17px;line-height:1.9;color:rgba(255,255,255,.78);max-width:560px}
.hero-cta{display:flex;gap:16px;margin-top:36px;flex-wrap:wrap}
.hero-stats{display:flex;gap:0;margin-top:44px;border-top:1px solid rgba(255,255,255,.14);padding-top:26px;flex-wrap:wrap}
.hero-stat{flex:1;min-width:150px;padding:0 24px;border-left:1px solid rgba(255,255,255,.12)}
.hero-stat:first-child{padding-left:0;border-left:none}
.hero-stat b{display:block;font-size:24px;font-weight:800;color:#fff}
.hero-stat b em{font-style:normal;color:var(--cyan-400)}
.hero-stat span{font-size:13px;color:rgba(255,255,255,.62)}
/* Hero 问答卡片 */
.qa-card{position:relative;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:var(--r-lg);padding:26px;backdrop-filter:blur(6px);box-shadow:var(--shadow-deep)}
.qa-card::before{content:"";position:absolute;top:-14px;right:34px;width:120px;height:120px;background:radial-gradient(circle,rgba(79,184,255,.35),transparent 70%);z-index:-1}
.qa-card-head{display:flex;align-items:center;gap:12px;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:20px}
.qa-avatar{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--blue-600),var(--cyan-400));display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:800}
.qa-card-head .t{font-weight:700;font-size:15px}
.qa-card-head .s{font-size:12px;color:rgba(255,255,255,.55)}
.qa-q{display:flex;gap:12px;margin-bottom:18px}
.qa-q .who{flex:none;width:30px;height:30px;border-radius:8px;background:rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:var(--cyan-400)}
.qa-q p{font-size:15px;color:rgba(255,255,255,.92);padding-top:4px}
.qa-a{display:flex;gap:12px}
.qa-a .who{flex:none;width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--blue-600),var(--cyan-400));display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff}
.qa-a .bubble{flex:1;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.14);border-radius:6px 16px 16px 16px;padding:16px 18px}
.qa-a .bubble p{font-size:15px;color:#fff;line-height:1.75}
.qa-cite{display:inline-flex;align-items:center;gap:6px;margin-top:4px;font-size:12px;color:var(--cyan-400);font-weight:600}
.qa-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;padding-left:42px}
.qa-chip{display:inline-flex;align-items:center;gap:7px;font-size:12px;color:rgba(255,255,255,.7);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);padding:6px 12px;border-radius:999px}
.qa-chip .dot{width:6px;height:6px;border-radius:50%;background:var(--dot-green)}
.qa-chip .stamp{font-variant-numeric:tabular-nums;color:var(--cyan-400);font-weight:700}
.qa-wave{display:flex;align-items:center;gap:3px;color:var(--cyan-400)}
.qa-wave i{width:3px;border-radius:2px;background:currentColor}

/* 链路条 */
.pipeline{position:relative;z-index:2;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-lg) var(--r-lg) 0 0;padding:30px 32px 34px}
.pipeline-label{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.2em;color:rgba(255,255,255,.55);margin-bottom:20px}
.pipeline-label::before{content:"";width:24px;height:2px;background:var(--cyan-400);border-radius:2px}
.pipeline-steps{display:flex;align-items:stretch;flex-wrap:wrap;gap:10px}
.pstep{flex:1;min-width:150px;display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:13px 14px;font-size:13.5px;color:rgba(255,255,255,.86);transition:background .2s ease,border-color .2s ease}
.pstep:hover{background:rgba(31,111,255,.22);border-color:rgba(79,184,255,.4)}
.pstep .n{flex:none;width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--blue-600),var(--cyan-400));color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}
.pstep .arr{flex:none;color:var(--cyan-400);opacity:.7;display:flex}

/* ===== 痛点区（浅色） ===== */
.challenge{background:var(--light)}
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:46px 0 34px}
.pain-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:32px 28px;box-shadow:var(--shadow-card);transition:transform .25s ease,box-shadow .25s ease}
.pain-card:hover{transform:translateY(-6px);box-shadow:0 18px 44px rgba(10,31,69,.12)}
.pain-ico{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;color:#fff}
.pain-ico.one{background:linear-gradient(135deg,var(--navy-700),var(--blue-600))}
.pain-ico.two{background:linear-gradient(135deg,var(--orange),#FFB36B)}
.pain-ico.three{background:linear-gradient(135deg,#16B8A6,var(--dot-green))}
.pain-card h3{font-size:20px;font-weight:700;margin-bottom:10px}
.pain-card p{font-size:14.5px;color:var(--ink-2)}
.pain-card .num{position:absolute;font-size:13px;font-weight:700;color:var(--ink-3)}
.pain-result{display:flex;align-items:center;gap:14px;background:linear-gradient(90deg,#FFF4EA,#FFF9F2);border:1px solid #FFD9B8;border-left:4px solid var(--orange);border-radius:var(--r-md);padding:18px 22px;margin-bottom:34px}
.pain-result svg{flex:none;color:var(--orange)}
.pain-result p{font-size:15px;font-weight:600;color:#8A4A14}
.screen-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:18px;box-shadow:var(--shadow-card)}
.screen-card img{border-radius:var(--r-md);width:100%}

/* ===== 方案总览（深色） ===== */
.solution{background:linear-gradient(170deg,var(--navy-950) 0%,var(--navy-900) 45%,var(--navy-800) 100%);color:#fff}
.principles{display:flex;flex-wrap:wrap;gap:14px;margin:8px 0 30px}
.principle{display:inline-flex;align-items:center;gap:10px;padding:10px 18px;border-radius:999px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);font-size:14.5px;font-weight:600;color:#fff}
.principle .dot{width:8px;height:8px;border-radius:50%}
.principle:nth-child(1) .dot{background:var(--dot-red)}
.principle:nth-child(2) .dot{background:var(--dot-yellow)}
.principle:nth-child(3) .dot{background:var(--dot-green)}
.principle:nth-child(4) .dot{background:var(--dot-blue)}
.screen-card.dark{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.14);box-shadow:var(--shadow-deep)}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:34px}
.feature{display:flex;gap:14px;align-items:flex-start;padding:20px;border-radius:var(--r-md);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1)}
.feature svg{flex:none;color:var(--cyan-400);margin-top:2px}
.feature b{display:block;font-size:15px;font-weight:700;margin-bottom:4px;color:#fff}
.feature span{font-size:13px;color:rgba(255,255,255,.62);line-height:1.6}

/* ===== 五大环节（浅色） ===== */
.steps{background:var(--light)}
.step-row{display:grid;grid-template-columns:1fr 1.06fr;gap:56px;align-items:center;padding:56px 0;border-top:1px solid var(--line)}
.step-row:first-of-type{border-top:none}
.step-info .step-no{display:flex;align-items:center;gap:16px;margin-bottom:18px}
.step-no b{font-size:52px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.6px var(--blue-600);letter-spacing:.02em}
.step-no span{font-size:13px;font-weight:600;letter-spacing:.2em;color:var(--ink-3);text-transform:uppercase;padding-top:10px}
.step-info h3{font-size:26px;font-weight:800;margin-bottom:14px;line-height:1.4}
.step-info p{font-size:15px;color:var(--ink-2);margin-bottom:16px}
.step-tags{display:flex;flex-wrap:wrap;gap:9px}
.tag{font-size:12.5px;font-weight:600;color:var(--navy-700);background:var(--light-2);border:1px solid rgba(31,111,255,.16);padding:6px 12px;border-radius:999px}
.step-media{position:relative}
.step-media .screen-card{overflow:hidden}
.step-media .screen-card img{transition:transform .45s ease}
.step-media:hover .screen-card img{transform:scale(1.02)}
.step-media .float-badge{position:absolute;left:-18px;bottom:-16px;display:flex;align-items:center;gap:9px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:12px 16px;box-shadow:var(--shadow-card);font-size:13px;font-weight:600;color:var(--navy-800)}
.float-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--dot-green);box-shadow:0 0 0 4px rgba(61,214,140,.18)}
.step-row:nth-child(even) .step-info{order:2}
.step-row:nth-child(even) .step-media{order:1}

/* ===== 客户价值（深色） ===== */
.value{background:linear-gradient(170deg,var(--navy-950) 0%,var(--navy-900) 50%,var(--navy-850) 100%);color:#fff}
.case-chip{display:inline-flex;align-items:center;gap:10px;padding:10px 20px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);font-size:14px;color:rgba(255,255,255,.85);margin-bottom:30px}
.case-chip .dot{width:8px;height:8px;border-radius:50%;background:var(--dot-blue)}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:46px}
.tl-card{position:relative;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-lg);padding:30px 26px;transition:transform .25s ease,border-color .25s ease}
.tl-card:hover{transform:translateY(-6px);border-color:rgba(79,184,255,.45)}
.tl-phase{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--cyan-400);padding:6px 14px;border-radius:999px;background:rgba(79,184,255,.12);border:1px solid rgba(79,184,255,.28);margin-bottom:20px}
.tl-card h4{font-size:19px;font-weight:700;margin-bottom:12px;color:#fff}
.tl-card p{font-size:14px;color:rgba(255,255,255,.7);line-height:1.85}
.tl-card p b{color:#fff;font-weight:700}
.stat-band{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:46px}
.stat{text-align:center;padding:30px 16px;border-radius:var(--r-lg);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12)}
.stat b{display:block;font-size:clamp(34px,4vw,48px);font-weight:800;line-height:1.1;color:transparent;background:linear-gradient(92deg,var(--cyan-400),var(--blue-500));-webkit-background-clip:text;background-clip:text}
.stat b sup{font-size:.55em;vertical-align:super}
.stat span{font-size:13.5px;color:rgba(255,255,255,.66)}
.stat .arrow{display:inline-block;font-weight:800;color:var(--cyan-400);font-size:14px;margin:0 6px}

/* ===== 结尾（浅色） ===== */
.closing{background:var(--light)}
.quote-block{text-align:center;max-width:870px;margin:0 auto 64px}
.quote-mark{width:56px;height:56px;margin:0 auto 24px;border-radius:16px;background:linear-gradient(135deg,var(--navy-700),var(--blue-600));display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 12px 28px rgba(31,111,255,.3)}
.quote-block .quote{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.55;letter-spacing:.01em}
.quote-block .quote em{font-style:normal;color:var(--blue-600)}
.quote-block p{margin-top:20px;color:var(--ink-2);font-size:16px;line-height:2}
.cta-card{position:relative;overflow:hidden;background:linear-gradient(150deg,var(--navy-950),var(--navy-800) 70%);border-radius:24px;color:#fff;padding:64px 56px;text-align:center;box-shadow:var(--shadow-deep)}
.cta-card::before{content:"";position:absolute;top:-80px;right:-60px;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(31,111,255,.4),transparent 70%)}
.cta-card::after{content:"";position:absolute;bottom:-100px;left:-60px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(79,184,255,.22),transparent 70%)}
.cta-card .inner{position:relative;z-index:2}
.cta-card h3{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:14px;color:#fff;}
.cta-card p{color:rgba(255,255,255,.75);font-size:16px;margin:0 auto 32px}
.cta-card .cta-line{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap}
.cta-phone{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:#fff;padding:14px 26px;border-radius:999px;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.08)}
.cta-phone svg{color:var(--cyan-400)}

/* ===== 页脚 ===== */
.footer{background:var(--navy-950);color:rgba(255,255,255,.7);padding:30px 0}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;color:rgba(255,255,255,.4);font-size:14px;}

/* ===== 移动端菜单 ===== */
.mobile-menu{display:none;background:#fff;border-bottom:1px solid var(--line);padding:8px 20px 16px}
.mobile-menu:not([hidden]){display:block}
.mobile-menu a{display:block;padding:13px 6px;font-size:15px;font-weight:500;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-menu a:last-child{border-bottom:none}
.mobile-menu a:hover{color:var(--blue-600)}

/* ===== 滚动显现 ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.reveal-d1{transition-delay:.1s}
.reveal-d2{transition-delay:.2s}
.reveal-d3{transition-delay:.3s}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .nav {
    gap: 20px;
  }
}
@media (max-width:1024px){
  .nav{display:none}
  .header-right .phone{display:none}
  .menu-btn{display:flex}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .pstep{min-width:200px}
}
@media (max-width:900px){
  .section{padding:80px 0}
  .step-row{grid-template-columns:1fr;gap:36px}
  .step-row:nth-child(even) .step-info{order:0}
  .step-row:nth-child(even) .step-media{order:0}
  .timeline{grid-template-columns:1fr}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .pain-grid{grid-template-columns:1fr}
  .cta-card{padding:48px 28px}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .hero{padding-top:64px}
  .hero-stats{gap:14px}
  .hero-stat{min-width:45%;border-left:none;padding:10px 0}
  .feature-grid{grid-template-columns:1fr}
  .stat-band{grid-template-columns:1fr 1fr}
  .step-no b{font-size:40px}
}
@media (max-width:450px){
  .brand-logo{height:30px;}
  .brand-name{font-size: 14px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}