/* ============================================================
   妙想同款 · 深空科技风 1:1 校准版
   ============================================================ */

:root{
  --bg:#070b1a;
  --bg2:#0a1030;
  --card:rgba(255,255,255,.05);
  --card2:rgba(255,255,255,.08);
  --line:rgba(255,255,255,.12);
  --ink:#f4f7ff;
  --ink2:#dbe4ff;
  --mut:#9aa6c4;
  --mut2:#6b7699;
  --accent:#30FCAC;
  --grad:linear-gradient(92deg,#30FCAC 0%,#8B5CF6 100%);
  --purple:linear-gradient(160deg,#8B5CF6 0%,#5B21B6 100%);
  --sans:"Noto Sans SC","PingFang SC",-apple-system,sans-serif;
  --radius:10px;
  --shadow:0 8px 30px rgba(0,0,0,.3);
}

body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(1200px 600px at 75% -10%,rgba(139,92,246,.3),transparent 60%),
    radial-gradient(900px 500px at 10% 0%,rgba(48,252,172,.18),transparent 55%),
    radial-gradient(800px 600px at 50% 100%,rgba(139,92,246,.15),transparent 60%),
    linear-gradient(180deg,#0a0e2a 0%,#070b1a 40%,#05070f 100%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;opacity:.6;
  background-image:
    radial-gradient(1.5px 1.5px at 20% 30%,#fff,transparent),
    radial-gradient(1px 1px at 60% 20%,#cfe,transparent),
    radial-gradient(1.5px 1.5px at 80% 50%,#fff,transparent),
    radial-gradient(1px 1px at 35% 70%,#aab,transparent),
    radial-gradient(1.5px 1.5px at 90% 80%,#fff,transparent),
    radial-gradient(1px 1px at 10% 80%,#bcd,transparent),
    radial-gradient(1px 1px at 50% 90%,#fff,transparent),
    radial-gradient(1.5px 1.5px at 70% 10%,#9cf,transparent);
}

/* ===== 导航 64px 高 ===== */
.nav{background:rgba(7,11,26,.6);backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-in{height:64px;display:flex;align-items:center}
.logo{font-weight:800;font-size:24px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.menu{font-size:16px;color:#cfd8ee}
.menu span{color:#cfd8ee;font-weight:400}
.menu span:hover,.menu span.on{color:#fff;font-weight:500}
.menu span.on::after{background:var(--grad);height:2px}
.btn-login{
  background:var(--grad);color:#fff;border-radius:22px;
  padding:12px 32px;font-size:15px;font-weight:600;
  box-shadow:0 6px 20px rgba(99,102,241,.4);
  height:44px;display:inline-flex;align-items:center;
}

/* ===== Hero 72px 粗体 ===== */
.hero{padding:120px 24px 80px;text-align:center;display:flex;flex-direction:column;align-items:center}
.hero h1{
  font-size:clamp(44px,5.8vw,80px);
  font-weight:900;
  line-height:1.15;
  letter-spacing:2px;
}
.hero h1 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 24px rgba(139,92,246,.5))}
.spark{color:#7dd3fc}
.hero > p{
  color:#aab3cf;font-size:17px;line-height:1.9;
  max-width:680px;margin-top:24px !important;font-weight:300;
}
.bullets{
  justify-content:center;gap:8px 36px !important;flex-direction:row;flex-wrap:wrap;
  margin-top:36px !important;font-size:18px;color:#dbe4ff;font-weight:400;
}
.bullets span::before{content:"·";margin-right:12px;color:#93c5fd}
.div{width:min(560px,82vw);height:1px;margin:28px auto 0;background:linear-gradient(90deg,transparent,rgba(96,165,250,.8),transparent)}
.pill{
  margin-top:56px !important;
  padding:18px 64px !important;
  border-radius:30px;
  border:1px solid rgba(255,255,255,.45);
  background:transparent;color:#fff;
  font-size:18px;letter-spacing:4px;font-weight:400;
}
.pill:hover{background:rgba(255,255,255,.1);border-color:#fff;box-shadow:0 0 30px rgba(96,165,250,.3)}
.slogan{color:var(--mut);font-size:15px;letter-spacing:2px}
.slogan .arrow{border-color:rgba(96,165,250,.7);color:#93c5fd}

/* ===== 区块 32px 标题 ===== */
section{padding:96px 0}
.eyebrow{
  font-size:13px;letter-spacing:4px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-weight:700;text-align:center;
}
.sec-title{
  font-size:clamp(24px,3vw,32px);
  font-weight:800;letter-spacing:1px;text-align:center;
}
.sec-title::after{display:none}
.sec-sub{color:var(--mut);font-size:15px;font-weight:300;text-align:center;max-width:760px;margin:12px auto 0}

/* ===== 四大能力卡 10px 圆角 ===== */
.adv-row{gap:20px;margin-top:56px}
.adv{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 26px;text-align:center;
  backdrop-filter:blur(10px);
  transition:.3s;
}
.adv .n{font-size:13px;letter-spacing:3px;color:#7dd3fc;font-weight:700;margin-bottom:10px}
.adv h3{font-size:18px;font-weight:700;margin-bottom:10px}
.adv p{font-size:13px;color:var(--mut);font-weight:300;line-height:1.7}
.adv .anchor{margin-top:14px;font-size:11px;color:#ff6b81;font-weight:600;letter-spacing:.5px;opacity:.9}
.adv:hover{transform:translateY(-4px);background:var(--card2);border-color:rgba(147,197,253,.4);box-shadow:var(--shadow)}
.adv:hover .anchor{color:#7dd3fc}

/* ===== 手风琴 ===== */
.acc{margin-top:44px}
.acard{background:#101731;border:1px solid var(--line);border-radius:12px}
.acard::before{background:#3b82f6}
.acard.active{background:var(--purple);border-color:rgba(139,92,246,.6)}

/* ===== 架构卡 ===== */
.arch-grid{gap:20px;margin-top:48px}
.arch-card{background:#101731;border:1px solid var(--line);border-radius:12px;min-height:0;padding:34px 30px}
.arch-card .atab{display:none}
.arch-card .aicon{font-size:28px;margin-bottom:14px}
.arch-card h3{font-size:22px;font-weight:700;margin-bottom:20px}
.arch-card .blk h4{color:#cdd6ec;font-size:14px;font-weight:600}
.arch-card .blk li{color:#8b96b6;font-size:13px}
.arch-card:hover{transform:translateY(-3px);border-color:rgba(139,92,246,.4)}

/* ===== 下载卡 ===== */
.dl-row{gap:18px;margin-top:40px}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:28px 22px;text-align:center}
.dl-card .ic{font-size:24px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}
.dl-card h3{font-size:16px;margin-bottom:8px}
.dl-card p{font-size:12.5px;color:var(--mut);font-weight:300}
.dl-card:hover{background:var(--card2);transform:translateY(-4px);border-color:rgba(147,197,253,.4)}

/* ===== 生态 ===== */
.eco-row{gap:30px 20px;margin-top:44px}
.eco .tile{background:#fff;border-radius:10px;box-shadow:0 6px 18px rgba(0,0,0,.25);width:64px;height:64px}
.eco .tile img{width:44px;height:44px}
.eco span{font-size:13.5px;color:#e6ebf5}

/* ===== 关于 ===== */
.about-card{background:#0e1428;border:1px solid var(--line);border-radius:14px;margin-top:40px}
.about-col h3{font-size:22px;font-weight:700}
.about-p{color:#b9c2dc;font-size:15px;line-height:2;font-weight:300;text-align:left}

/* ===== band ===== */
.band h2{font-size:clamp(24px,3.6vw,38px);font-weight:800;letter-spacing:1px;text-align:center}
.band h2 em{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-style:normal}
.band p{color:var(--mut);font-weight:300;text-align:center}

/* ===== footer ===== */
footer{border-top:1px solid var(--line)}
.foot-name{font-weight:800;font-size:24px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.foot-in p{color:var(--mut);font-size:13.5px;line-height:2}
.foot-in h4{color:#fff;font-size:14px;margin-bottom:10px}
.foot-bottom{color:var(--mut2);font-size:12.5px;border-top:1px solid var(--line)}

/* ===== 验算器 ===== */
#verify .about-card{background:#0e1428;border-radius:14px}
#verify input{background:#0a1024;border:1px solid var(--line);color:#fff;border-radius:8px}
#verify input:focus{border-color:#3b82f6}
#verify button{background:var(--grad);border-radius:8px;color:#fff;font-weight:600}
#verify .b.old{background:#0a1024;border:1px solid var(--line);border-radius:10px}
#verify .b.old .h{color:#f87171}
#verify .b.new{background:#0a1024;border:1px solid rgba(52,211,153,.4);border-radius:10px}
#verify .b.new .h{color:#34d399}

/* ===== 弹窗 ===== */
.modal{background:#0e1428;border:1px solid var(--line);border-radius:12px}
.modal input{background:#0a1024;border:1px solid var(--line);color:#fff;border-radius:8px}
.modal button{background:var(--grad);border-radius:8px}

/* ===== tabbar ===== */
.tabbar{background:rgba(7,11,26,.88)}

/* ===== 星球 ===== */
.planet{opacity:.9;filter:drop-shadow(0 0 40px rgba(59,130,246,.3))}

/* ============================================================
   整屏翻页 · 一屏一板块（妙想同款）
   ============================================================ */
html{scroll-snap-type:y proximity;scroll-behavior:smooth}
body{overflow-x:hidden}
section,
.hero,
.band,
.about-card-wrap,
footer{
  scroll-snap-align:start;
  scroll-snap-stop:always;
}
/* 主要 section 强制 100vh，内容垂直居中 */
section{
  min-height:100vh;
  display:flex;flex-direction:column;justify-content:center;
  padding:120px 24px;
  position:relative;
}
.hero{min-height:100vh;padding:120px 24px}
/* 验算区因为内容多，不强制 100vh */
#verify{min-height:auto}
footer{scroll-snap-align:end}

/* 每屏独立背景光（不刺眼，只分层） */
section:nth-of-type(2){
  background:radial-gradient(800px 400px at 50% 0%,rgba(59,130,246,.12),transparent 70%);
}
section:nth-of-type(3){
  background:radial-gradient(700px 500px at 20% 80%,rgba(139,92,246,.1),transparent 70%);
}
section:nth-of-type(4){
  background:radial-gradient(900px 500px at 80% 20%,rgba(34,211,238,.08),transparent 70%);
}
.band{
  min-height:60vh;
  background:
    radial-gradient(600px 300px at 50% 50%,rgba(99,102,241,.18),transparent 70%);
}

/* 卡片入场动画 */
@keyframes rise{
  from{opacity:0;transform:translateY(24px)}
  to{opacity:1;transform:translateY(0)}
}
section, .adv, .arch-card, .dl-card, .acard{
  animation:rise .7s cubic-bezier(.22,1,.36,1) both;
}
.adv:nth-child(2){animation-delay:.08s}
.adv:nth-child(3){animation-delay:.16s}
.adv:nth-child(4){animation-delay:.24s}

/* 尊重 reduced motion */
@media (prefers-reduced-motion:reduce){
  html{scroll-snap-type:none;scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
}

/* 移动端：snap 弱一点，避免卡死 */
@media (max-width:768px){
  html{scroll-snap-type:y proximity}
  section{min-height:auto;padding:80px 20px}
  .hero{min-height:100vh}
}