/* ============================================================
   anybuddy.cn — 浅色高端单页
   ============================================================ */
:root{
  --bg:#f6f7fb;            /* 主背景 浅灰蓝 */
  --bg-soft:#eef1f7;       /* 分区底色 */
  --bg-card:#ffffff;       /* 卡片 */
  --ink:#14181f;           /* 主文字 近黑 */
  --ink-2:#3c4450;         /* 次级 */
  --muted:#7b8495;         /* 弱文字 */
  --line:#e4e8ef;          /* 边框 */
  --brand:#2f6bff;         /* 品牌蓝 */
  --brand-2:#5b8cff;       /* 浅蓝 */
  --brand-deep:#1c4fd6;
  --accent:#ffb02e;        /* 点缀金 */
  --ok:#1da06a;
  --radius:18px;
  --radius-lg:26px;
  --shadow:0 10px 34px rgba(20,35,70,.08);
  --shadow-lg:0 22px 60px rgba(20,35,70,.12);
  --maxw:1120px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.7;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.link{color:var(--brand);font-weight:600}
.link:hover{text-decoration:underline}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;
  font-size:15px;line-height:1;padding:14px 26px;border-radius:999px;border:1px solid transparent;
  transition:all .2s ease;cursor:pointer;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 24px rgba(47,107,255,.28)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 12px 30px rgba(47,107,255,.34)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-lg{padding:16px 32px;font-size:16px}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;backdrop-filter:blur(14px);
  background:rgba(246,247,251,.72);border-bottom:1px solid rgba(228,232,239,.7)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 22px;height:66px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:11px}
.brand-dot{width:15px;height:15px;border-radius:50%;background:conic-gradient(from 0deg,var(--brand),var(--brand-2),var(--accent),var(--brand));box-shadow:0 0 12px rgba(47,107,255,.6)}
.brand-name{font-size:21px;font-weight:800;letter-spacing:-.02em}
.nav-links{display:flex;gap:30px}
.nav-links a{font-size:15px;color:var(--ink-2);font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--brand)}
.nav-cta{margin-left:6px;padding:11px 22px}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-burger span{width:22px;height:2px;background:var(--ink);display:block;border-radius:2px;transition:.2s}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-veil{position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(246,247,251,.60) 0%,rgba(246,247,251,.86) 55%,var(--bg) 100%)}
.hero-inner{position:relative;z-index:2;width:100%}
.hero-top{max-width:720px}
.badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  color:var(--brand);font-weight:600;font-size:13.5px;padding:8px 15px;border-radius:999px;box-shadow:var(--shadow)}
.badge::before{content:"";width:7px;height:7px;background:var(--ok);border-radius:50%;box-shadow:0 0 8px var(--ok)}
.hero-title{font-size:clamp(38px,6vw,70px);line-height:1.12;font-weight:850;letter-spacing:-.03em;margin:24px 0 18px}
.hero-title .accent{color:var(--brand);background:linear-gradient(120deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:clamp(16px,2.2vw,19px);color:var(--ink-2);max-width:600px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}

/* ---------- 脉搏带 ---------- */
.pulse-card{margin-top:56px;background:rgba(255,255,255,.82);backdrop-filter:blur(18px);
  border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:26px 28px}
.pulse-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:20px}
.pulse-live{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:15px;color:var(--ink)}
.pulse-live .dot{width:9px;height:9px;background:var(--ok);border-radius:50%;box-shadow:0 0 10px var(--ok);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.pulse-note{font-size:13px;color:var(--muted)}
.pulse-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.pulse-item{text-align:left;padding:4px 2px}
.pulse-num{font-size:clamp(24px,3vw,38px);font-weight:850;letter-spacing:-.03em;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1.1}
.pulse-label{font-size:13px;color:var(--muted);margin-top:7px}
.pulse-foot{margin-top:20px;padding-top:16px;border-top:1px dashed var(--line)}
.pulse-meta{font-size:13px;color:var(--muted)}

/* ---------- 通用 section ---------- */
.section{padding:96px 0}
.section-head{text-align:center;margin-bottom:52px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}
.section-title{font-size:clamp(30px,4.4vw,50px);font-weight:850;letter-spacing:-.03em;line-height:1.14}
.section-sub{font-size:17px;color:var(--muted);margin-top:16px}

/* ---------- Buddy 卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card-img{aspect-ratio:16/10;overflow:hidden;background:var(--bg-soft)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .card-img img{transform:scale(1.04)}
.card-body{padding:26px 24px 30px}
.card-body h3{font-size:20px;font-weight:750;display:flex;align-items:center;gap:11px;margin-bottom:12px}
.card-num{font-size:13px;font-weight:800;color:var(--brand);background:rgba(47,107,255,.1);padding:4px 9px;border-radius:8px}
.card-body p{font-size:15px;color:var(--ink-2)}

/* ---------- 新旧对照 ---------- */
.compare{margin-top:52px;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px;box-shadow:var(--shadow)}
.compare-head{display:flex;gap:20px;margin-bottom:24px}
.compare-tag{font-size:14px;font-weight:700;padding:7px 15px;border-radius:9px}
.compare-tag-old{background:#eef0f4;color:#5b6470}
.compare-tag-new{background:rgba(47,107,255,.12);color:var(--brand)}
.compare-row{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-col{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.compare-col-old{color:#8a93a1}
.compare-step{background:#f4f6f9;border:1px solid var(--line);padding:11px 15px;border-radius:11px;font-weight:600;font-size:14px}
.compare-arrow{color:#b7bfcc;font-size:18px}
.compare-col-new .compare-step{background:rgba(47,107,255,.09);border-color:rgba(47,107,255,.28);color:var(--brand-deep)}

/* ---------- 实战 统计 ---------- */
.practice{background:var(--bg-soft)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-bottom:56px}
.stat{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;text-align:center;box-shadow:var(--shadow)}
.stat-num{font-size:clamp(34px,4.6vw,58px);font-weight:850;letter-spacing:-.03em;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1}
.stat-num .suffix{font-size:.5em;font-weight:750;color:var(--ink-2);margin-left:4px}
.stat-label{font-size:14px;color:var(--muted);margin-top:12px}

/* 开发日记 */
.timeline{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:38px;box-shadow:var(--shadow)}
.tl-title{font-size:22px;font-weight:800;margin-bottom:28px;color:var(--ink)}
.tl-list{position:relative;padding-left:24px;border-left:2px solid var(--line)}
.tl-item{position:relative;padding:0 0 26px 18px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-29px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(47,107,255,.15)}
.tl-date{font-size:13px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;margin-bottom:5px}
.tl-body{font-size:15px;color:var(--ink-2)}
.tl-body strong{color:var(--ink)}
.tl-note{margin-top:24px;font-size:14px;color:var(--muted);background:var(--bg-soft);padding:14px 18px;border-radius:12px}

/* 架构 */
.card-arch{margin-top:26px;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:38px;box-shadow:var(--shadow)}
.arch-flow{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.arch-node{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  padding:14px 18px;border-radius:14px;background:var(--bg-soft);border:1px solid var(--line);font-weight:700;font-size:15px;text-align:center}
.arch-node small{font-size:11.5px;font-weight:500;color:var(--muted)}
.arch-key{background:rgba(47,107,255,.08);border-color:rgba(47,107,255,.24);color:var(--brand-deep)}
.arch-arrow{color:#b7bfcc;font-size:20px;font-weight:700}
.arch-plus{color:var(--muted);font-size:18px;font-weight:700;padding:0 2px}
.arch-note{margin-top:24px;font-size:14px;color:var(--muted)}
.cta-line{text-align:center;font-size:17px;color:var(--ink-2);margin-top:44px}

/* ---------- 转型路径 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-bottom:56px}
.step{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.step::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--brand),var(--brand-2))}
.step-tag{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);background:rgba(47,107,255,.1);padding:6px 14px;border-radius:9px;margin-bottom:16px}
.step h3{font-size:21px;font-weight:800;margin-bottom:12px}
.step p{font-size:15px;color:var(--ink-2)}

.promise{background:linear-gradient(135deg,#1c4fd6,#2f6bff);border-radius:var(--radius-lg);padding:40px;color:#fff;box-shadow:var(--shadow-lg)}
.promise-title{font-size:22px;font-weight:800;margin-bottom:24px}
.promise-list{display:flex;flex-direction:column;gap:16px}
.promise-item{display:flex;gap:14px;align-items:flex-start;font-size:16px;opacity:.96}
.promise-item .pi{background:rgba(255,255,255,.16);border-radius:50%;width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;flex:none;margin-top:2px}

/* ---------- 联系 ---------- */
.contact{background:var(--bg-soft)}
.contact-card{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:52px;box-shadow:var(--shadow-lg);align-items:center}
.contact-title{font-size:clamp(26px,3.4vw,40px);font-weight:850;letter-spacing:-.02em;line-height:1.2;margin:14px 0 16px}
.contact-sub{font-size:16px;color:var(--ink-2);margin-bottom:28px}
.contact-info{list-style:none;display:flex;flex-direction:column;gap:14px}
.contact-info li{font-size:15px;color:var(--ink-2);display:flex;gap:12px;align-items:baseline}
.contact-info a{color:var(--brand);font-weight:600}
.contact-info a:hover{text-decoration:underline}
.ci{flex:none;min-width:46px;font-size:12.5px;font-weight:700;color:var(--brand);background:rgba(47,107,255,.1);text-align:center;padding:4px 0;border-radius:7px}
.contact-right{display:flex;justify-content:center}
.qr-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center;box-shadow:var(--shadow)}
.qr-img{width:230px;height:230px;object-fit:contain;border-radius:8px}
.qr-caption{font-size:14px;font-weight:600;color:var(--ink-2);margin-top:14px}
.contact-cta{text-align:center;margin-top:34px;font-size:16px;color:var(--ink-2)}
.chip{display:inline-block;background:var(--brand);color:#fff;font-weight:600;padding:6px 14px;border-radius:999px;font-size:14px;margin-left:6px}

/* ---------- 页脚 ---------- */
.footer{background:#0f141c;color:#aab2c0;padding:54px 0 30px}
.brand-footer .brand-name{color:#fff}
.footer-top{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-meta{display:flex;gap:22px;flex-wrap:wrap;font-size:14px}
.footer-meta a{color:var(--brand-2)}
.footer-meta a:hover{text-decoration:underline}
.footer-bottom{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-top:24px;font-size:13px;color:#7d8695}
.footer-bottom a{color:#aab2c0}
.footer-bottom a:hover{color:#fff}

/* ---------- 滚动进入动效 ---------- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .nav-links{display:none}
  .nav-burger{display:flex}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:18px 22px;gap:16px;box-shadow:var(--shadow)}
  .nav-links.open a{color:var(--ink)}
  .pulse-grid{grid-template-columns:repeat(3,1fr)}
  .cards,.steps{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .compare-row{grid-template-columns:1fr}
  .contact-card{grid-template-columns:1fr;padding:32px}
  .arch-flow{gap:8px}
  .section{padding:70px 0}
}
@media(max-width:600px){
  .pulse-grid{grid-template-columns:repeat(2,1fr)}
  .hero{padding:100px 0 60px}
  .nav-cta{display:none}
  .stat-grid{grid-template-columns:1fr 1fr;gap:14px}
  .timeline,.card-arch{padding:26px}
}