/* =========================================================
   hi开放平台 — 官网样式
   扁平化 / 苹果风 / 无紫 / 无 emoji
   ========================================================= */

/* ---------- 1. 基础 ---------- */
:root{
  --ink:#1d1d1f;
  --ink-2:#424245;
  --mute:#6e6e73;
  --mute-2:#86868b;
  --line:#d2d2d7;
  --line-soft:rgba(0,0,0,.08);
  --bg:#ffffff;
  --bg-soft:#f5f5f7;
  --bg-dark:#000000;
  --blue:#0071e3;
  --blue-dk:#0062c4;
  --blue-lt:#2997ff;
  --ok:#1d9c5c;

  --r-s:12px;
  --r-m:18px;
  --r-l:24px;
  --r-xl:32px;
  --pill:980px;

  --ease:cubic-bezier(.22,1,.36,1);
  --ease-2:cubic-bezier(.4,0,.2,1);

  --shadow-s:0 1px 3px rgba(0,0,0,.04), 0 6px 18px rgba(0,0,0,.05);
  --shadow-m:0 2px 8px rgba(0,0,0,.05), 0 20px 48px rgba(0,0,0,.08);
  --shadow-l:0 8px 24px rgba(0,0,0,.06), 0 40px 90px rgba(0,0,0,.13);

  --nav-h:52px;
  --wrap:1120px;
}

*,*::before,*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--nav-h) + 20px);
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro SC","SF Pro Display","SF Pro Text","PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.022em;line-height:1.12;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
svg{display:block;}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 26px;}
.wrap-narrow{max-width:860px;}
.center{text-align:center;}
.br-desk{display:none;}
@media(min-width:735px){.br-desk{display:inline;}}

/* 图标是纯线条，统一描边风格 */
.ico{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}
.ico-lg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:1.55;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 2. 滚动进度条 ---------- */
.progress{
  position:fixed;inset:0 0 auto 0;height:2px;z-index:999;
  background:var(--ink);
  transform:scaleX(0);transform-origin:0 50%;
  will-change:transform;
}

/* ---------- 3. 导航 ---------- */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:900;
  background:rgba(255,255,255,0);
  transition:background .45s var(--ease-2), box-shadow .45s var(--ease-2), backdrop-filter .45s var(--ease-2);
}
.nav.stuck{
  background:rgba(251,251,253,.82);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  backdrop-filter:saturate(180%) blur(20px);
  box-shadow:0 1px 0 rgba(0,0,0,.07);
}
.nav-inner{
  max-width:var(--wrap);margin:0 auto;padding:0 26px;
  height:var(--nav-h);display:flex;align-items:center;gap:34px;
}
.brand{display:inline-flex;align-items:center;gap:9px;flex:0 0 auto;}
.brand-mark{
  width:26px;height:26px;border-radius:8px;background:var(--ink);
  display:grid;place-items:center;transition:transform .5s var(--ease);
}
.brand-mark svg{width:26px;height:26px;fill:#fff;}
.brand:hover .brand-mark{transform:rotate(-6deg) scale(1.06);}
.brand-text{font-size:16.5px;font-weight:600;letter-spacing:-.02em;}
.brand-text em{font-style:normal;font-weight:400;color:var(--mute);margin-left:3px;}

.nav-links{display:flex;align-items:center;gap:30px;margin-left:auto;}
.nav-links a{
  font-size:13.5px;color:var(--ink-2);opacity:.86;position:relative;
  transition:opacity .3s var(--ease-2),color .3s var(--ease-2);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:1.5px;
  background:var(--ink);border-radius:2px;transform:scaleX(0);transform-origin:50% 50%;
  transition:transform .4s var(--ease);
}
.nav-links a:hover{opacity:1;color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}

.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

.nav-toggle{
  display:none;width:34px;height:34px;margin-left:auto;
  flex-direction:column;justify-content:center;gap:5px;align-items:flex-end;
}
.nav-toggle span{display:block;height:1.6px;width:19px;background:var(--ink);border-radius:2px;transition:transform .45s var(--ease),opacity .3s;}
.nav-toggle span:last-child{width:13px;}
.nav-toggle[aria-expanded="true"] span:first-child{transform:translateY(3.3px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:last-child{width:19px;transform:translateY(-3.3px) rotate(-45deg);}

.nav-mobile{
  display:none;flex-direction:column;padding:8px 26px 26px;
  background:rgba(251,251,253,.96);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  backdrop-filter:saturate(180%) blur(20px);
  border-top:1px solid var(--line-soft);
}
.nav-mobile a{padding:13px 0;font-size:17px;font-weight:500;border-bottom:1px solid var(--line-soft);}
.nav-mobile-actions{display:flex;gap:12px;padding-top:20px;}
.nav-mobile-actions .btn{flex:1;justify-content:center;}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  border-radius:var(--pill);font-size:14.5px;font-weight:500;letter-spacing:-.01em;
  padding:9px 19px;white-space:nowrap;
  transition:background .3s var(--ease-2),color .3s var(--ease-2),
             transform .35s var(--ease),box-shadow .35s var(--ease),opacity .3s var(--ease-2);
  will-change:transform;
}
.btn:active{transform:scale(.965);}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-dk);transform:translateY(-1px);box-shadow:0 8px 22px rgba(0,113,227,.28);}
.btn-quiet{background:var(--bg-soft);color:var(--ink);}
.btn-quiet:hover{background:#ebebed;transform:translateY(-1px);}
.btn-ghost{color:var(--ink);opacity:.85;}
.btn-ghost:hover{opacity:1;}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(255,255,255,.22);}
.btn-outline-light{color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.4);}
.btn-outline-light:hover{background:rgba(255,255,255,.12);box-shadow:inset 0 0 0 1px rgba(255,255,255,.7);}
.btn-lg{font-size:16.5px;padding:13px 28px;}
.btn-block{width:100%;padding:12px 20px;margin-top:26px;}

/* ---------- 5. 通用文字 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13.5px;font-weight:500;letter-spacing:.01em;color:var(--blue);
  margin-bottom:17px;
}
.eyebrow.center{justify-content:center;width:100%;}
.pulse{
  width:6px;height:6px;border-radius:50%;background:var(--blue);position:relative;flex:0 0 auto;
}
.pulse::after{
  content:"";position:absolute;inset:-3px;border-radius:50%;
  background:var(--blue);opacity:.35;animation:pulse 2.2s var(--ease-2) infinite;
}
@keyframes pulse{0%{transform:scale(.6);opacity:.4}70%{transform:scale(2.1);opacity:0}100%{opacity:0}}

.h2{font-size:clamp(29px,4.3vw,50px);letter-spacing:-.024em;}
.lede{
  font-size:clamp(16.5px,1.45vw,20px);line-height:1.55;
  color:var(--mute);letter-spacing:-.006em;font-weight:400;
}
.lede.center{max-width:640px;margin:20px auto 0;}
.h2.center{max-width:760px;margin-left:auto;margin-right:auto;}
.on-dark{color:#f5f5f7;}
.lede.on-dark{color:#a1a1a6;}

.grad{
  background:linear-gradient(96deg,#0071e3 0%,#0a9bff 48%,#40c8f4 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ---------- 6. 滚动进场 ---------- */
.js .reveal{
  opacity:0;transform:translateY(30px);
  transition:opacity .9s var(--ease),transform 1s var(--ease);
  transition-delay:calc(var(--d,0) * 95ms);
}
.js .reveal.in{opacity:1;transform:none;}

/* ---------- 7. 首屏 ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:calc(var(--nav-h) + 74px) 0 96px;
}
.hero-glow{position:absolute;inset:0;pointer-events:none;overflow:hidden;}
.blob{
  position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;
  will-change:transform;
}
.b1{width:640px;height:640px;background:rgba(0,113,227,.20);top:-230px;right:-130px;animation:drift1 24s ease-in-out infinite;}
.b2{width:440px;height:440px;background:rgba(64,200,244,.26);top:170px;right:240px;animation:drift2 30s ease-in-out infinite;}
.b3{width:390px;height:390px;background:rgba(0,166,255,.14);bottom:-140px;left:-90px;animation:drift3 27s ease-in-out infinite;}
@keyframes drift1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-56px,52px) scale(1.12)}}
@keyframes drift2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(70px,-44px) scale(.9)}}
@keyframes drift3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(48px,-38px) scale(1.16)}}

.grid-fade{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(0,0,0,.032) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(0,0,0,.032) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse 78% 62% at 50% 32%,#000 8%,transparent 72%);
  mask-image:radial-gradient(ellipse 78% 62% at 50% 32%,#000 8%,transparent 72%);
}

.hero-wrap{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center;
}
.hero-copy h1{
  font-size:clamp(36px,5.2vw,62px);
  letter-spacing:-.03em;line-height:1.12;
}
.hero-copy .lede{margin-top:24px;max-width:470px;}

.hero-actions{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap;}
.hero-actions.center{justify-content:center;}
.btn-quiet .ico{transition:transform .4s var(--ease);}
.btn-quiet:hover .ico{transform:translateX(3px);}

.hero-notes{display:flex;gap:26px;margin-top:32px;flex-wrap:wrap;}
.hero-notes li{display:flex;align-items:center;gap:7px;font-size:13.5px;color:var(--mute);}
.hero-notes .ico{width:15px;height:15px;stroke-width:2.4;color:var(--blue);}

/* ---------- 8. 控制台示意 ---------- */
.hero-visual{position:relative;}
.mock{
  position:relative;z-index:2;
  border-radius:var(--r-l);overflow:hidden;
  background:#fff;
  border:1px solid var(--line-soft);
  box-shadow:var(--shadow-l);
  transform:perspective(1500px) rotateY(-6deg) rotateX(3deg);
  transform-style:preserve-3d;
  transition:transform .9s var(--ease);
}
.mock-shadow{
  position:absolute;left:7%;right:7%;bottom:-30px;height:60px;
  background:radial-gradient(ellipse at 50% 0,rgba(0,0,0,.24),transparent 70%);
  filter:blur(16px);z-index:1;
}
.mock-chrome{
  display:flex;align-items:center;gap:7px;
  padding:12px 15px;border-bottom:1px solid var(--line-soft);
  background:#fbfbfd;
}
.dot{width:10px;height:10px;border-radius:50%;background:#e0e0e4;}
.mock-url{
  margin-left:12px;display:inline-flex;align-items:center;gap:6px;
  font-size:11.5px;color:var(--mute-2);
  background:#f0f0f2;border-radius:var(--pill);padding:4px 12px;
  letter-spacing:-.01em;
}
.ico-lock{width:11px;height:11px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}

.mock-body{display:grid;grid-template-columns:46px 1fr;}
.mock-side{
  display:flex;flex-direction:column;align-items:center;gap:11px;
  padding:16px 0;background:#fbfbfd;border-right:1px solid var(--line-soft);
}
.ms{width:20px;height:20px;border-radius:6px;background:#e8e8ec;}
.ms.on{background:var(--blue);box-shadow:0 3px 9px rgba(0,113,227,.34);}

.mock-main{padding:17px 19px 19px;}
.mock-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;}
.mock-title{font-size:14.5px;font-weight:600;letter-spacing:-.015em;}
.mock-sub{font-size:11px;color:var(--mute-2);margin-top:2px;}
.tag-ok{
  display:inline-flex;align-items:center;gap:5px;
  font-size:10.5px;font-weight:500;color:var(--ok);
  background:rgba(29,156,92,.1);border-radius:var(--pill);padding:3.5px 10px;
}
.tag-ok::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--ok);}

.mock-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-top:15px;}
.kpi{background:#fbfbfd;border-radius:var(--r-s);padding:10px 11px;}
.kpi-label{font-size:10px;color:var(--mute-2);}
.kpi-val{font-size:20px;font-weight:600;letter-spacing:-.03em;margin-top:3px;line-height:1.1;}
.kpi-val em{font-style:normal;font-size:11px;font-weight:500;color:var(--mute-2);margin-left:1px;}

.mock-chart{margin-top:15px;height:74px;}
.mock-chart svg{width:100%;height:100%;}
.chart-grid line{stroke:rgba(0,0,0,.055);stroke-width:1;}
.chart-area{opacity:0;transition:opacity .8s var(--ease-2) .85s;}
.chart-line{
  stroke-dasharray:520;stroke-dashoffset:520;
  transition:stroke-dashoffset 1.9s var(--ease) .25s;
}
.mock.lit .chart-line{stroke-dashoffset:0;}
.mock.lit .chart-area{opacity:1;}

.mock-rows{margin-top:15px;display:flex;flex-direction:column;gap:9px;}
.mrow{display:grid;grid-template-columns:104px 1fr 34px;align-items:center;gap:10px;}
.mname{font-size:11px;color:var(--ink-2);letter-spacing:-.01em;}
.mbar{height:5px;border-radius:var(--pill);background:#f0f0f2;overflow:hidden;}
.mbar i{
  display:block;height:100%;width:0;border-radius:var(--pill);
  background:linear-gradient(90deg,#0071e3,#40c8f4);
  transition:width 1.3s var(--ease) .5s;
}
.mock.lit .mbar i{width:var(--w);}
.mval{font-size:11px;color:var(--mute-2);text-align:right;font-variant-numeric:tabular-nums;}

/* ---------- 9. 数据条 ---------- */
.stats{background:var(--bg-soft);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);padding:56px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;}
.stat{text-align:center;}
.stat-num{
  font-size:clamp(30px,3.6vw,44px);font-weight:600;letter-spacing:-.035em;line-height:1;
  font-variant-numeric:tabular-nums;
}
.stat-num em{font-style:normal;font-size:.46em;font-weight:500;color:var(--mute-2);margin-left:3px;letter-spacing:-.01em;}
.stat-cap{font-size:13.5px;color:var(--mute);margin-top:11px;}

/* ---------- 10. 目标 ---------- */
.mission{padding:118px 0;}
.mission-cols{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;
  max-width:920px;margin:44px auto 0;
}
.mission-cols p{font-size:16.5px;line-height:1.75;color:var(--mute);letter-spacing:-.004em;}
.mission-cols p:first-child{color:var(--ink-2);}

.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:76px;}
.pillar{
  background:var(--bg-soft);border-radius:var(--r-l);padding:32px 26px 30px;
  transition:transform .6s var(--ease),box-shadow .6s var(--ease),background .4s var(--ease-2);
}
.pillar:hover{transform:translateY(-5px);box-shadow:var(--shadow-m);background:#fff;}
.pillar-ico{
  display:grid;place-items:center;width:46px;height:46px;border-radius:14px;
  background:#fff;color:var(--blue);margin-bottom:20px;
  box-shadow:var(--shadow-s);transition:transform .6s var(--ease);
}
.pillar:hover .pillar-ico{transform:scale(1.07) rotate(-4deg);}
.pillar h3{font-size:19px;letter-spacing:-.02em;}
.pillar p{font-size:14.5px;color:var(--mute);margin-top:10px;line-height:1.65;}

/* ---------- 11. 能力 ---------- */
.features{padding:118px 0;background:var(--bg-soft);}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:62px;}
.feat{
  background:#fff;border-radius:var(--r-l);padding:34px 28px 32px;
  transition:transform .6s var(--ease),box-shadow .6s var(--ease);
}
.feat:hover{transform:translateY(-6px);box-shadow:var(--shadow-m);}
.feat-ico{
  display:grid;place-items:center;width:48px;height:48px;border-radius:15px;
  background:rgba(0,113,227,.09);color:var(--blue);margin-bottom:22px;
  transition:transform .6s var(--ease),background .4s var(--ease-2);
}
.feat:hover .feat-ico{transform:translateY(-2px) scale(1.06);background:rgba(0,113,227,.14);}
.feat h3{font-size:19.5px;letter-spacing:-.02em;}
.feat p{font-size:14.5px;color:var(--mute);margin-top:11px;line-height:1.68;}

/* ---------- 12. 流程 ---------- */
.flow{padding:118px 0;}
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:66px;
  position:relative;
}
.steps::before{
  content:"";position:absolute;top:19px;left:9%;right:9%;height:1px;
  background:linear-gradient(90deg,transparent,var(--line),var(--line),transparent);
}
.step{position:relative;}
.step-num{
  display:inline-grid;place-items:center;
  width:38px;height:38px;border-radius:50%;
  background:#fff;box-shadow:inset 0 0 0 1px var(--line);
  font-size:12.5px;font-weight:600;color:var(--ink);
  position:relative;z-index:2;letter-spacing:-.01em;
  transition:background .5s var(--ease),color .5s var(--ease),box-shadow .5s var(--ease),transform .5s var(--ease);
}
.step:hover .step-num{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(0,113,227,.3);transform:scale(1.08);}
.step h3{font-size:17.5px;margin-top:22px;letter-spacing:-.02em;}
.step p{font-size:14px;color:var(--mute);margin-top:9px;line-height:1.68;}

/* ---------- 13. 价格 ---------- */
.pricing{padding:118px 0;background:var(--bg-soft);}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:64px;align-items:start;}
.plan{
  position:relative;background:#fff;border-radius:var(--r-l);
  padding:36px 30px 32px;
  transition:transform .6s var(--ease),box-shadow .6s var(--ease);
}
.plan:hover{transform:translateY(-6px);box-shadow:var(--shadow-m);}
.plan-hot{background:var(--ink);color:#f5f5f7;box-shadow:var(--shadow-m);}
.plan-hot:hover{box-shadow:var(--shadow-l);}
.plan-badge{
  position:absolute;top:-11px;left:50%;transform:translateX(-50%);
  background:var(--blue);color:#fff;font-size:11.5px;font-weight:500;
  padding:5px 15px;border-radius:var(--pill);white-space:nowrap;letter-spacing:.01em;
}
.plan h3{font-size:19px;letter-spacing:-.02em;}
.plan-price{
  font-size:44px;font-weight:600;letter-spacing:-.04em;line-height:1;
  margin-top:18px;display:flex;align-items:baseline;gap:2px;
  font-variant-numeric:tabular-nums;
}
.plan-price .cur{font-size:22px;font-weight:500;margin-right:1px;align-self:flex-start;margin-top:5px;}
.plan-price em{font-style:normal;font-size:13.5px;font-weight:400;color:var(--mute-2);letter-spacing:-.01em;margin-left:7px;}
.plan-desc{font-size:14px;color:var(--mute);margin-top:14px;line-height:1.6;min-height:44px;}
.plan ul{margin-top:24px;display:flex;flex-direction:column;gap:12px;}
.plan li{
  font-size:14.5px;color:var(--ink-2);padding-left:24px;position:relative;
}
.plan li::before{
  content:"";position:absolute;left:2px;top:8px;width:10px;height:6px;
  border-left:1.9px solid var(--blue);border-bottom:1.9px solid var(--blue);
  transform:rotate(-45deg);border-radius:1px;
}
.plan-hot h3,.plan-hot .plan-price{color:#fff;}
.plan-hot .plan-desc{color:#a1a1a6;}
.plan-hot li{color:#d2d2d7;}
.plan-hot li::before{border-color:var(--blue-lt);}
.plan-hot .plan-price em{color:#86868b;}

/* ---------- 14. 常见问题 ---------- */
.faq{padding:118px 0;}
.faq-list{margin-top:56px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 4px;text-align:left;
  font-size:17.5px;font-weight:500;letter-spacing:-.018em;
  transition:color .3s var(--ease-2);
}
.faq-q:hover{color:var(--blue);}
.ico-chev{
  width:19px;height:19px;flex:0 0 auto;
  fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;
  color:var(--mute-2);
  transition:transform .5s var(--ease),color .3s var(--ease-2);
}
.faq-item.open .ico-chev{transform:rotate(180deg);color:var(--blue);}
.faq-item.open .faq-q{color:var(--blue);}
.faq-a{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .5s var(--ease);
}
.faq-item.open .faq-a{grid-template-rows:1fr;}
.faq-a > div{overflow:hidden;}
.faq-a p{
  font-size:15.5px;line-height:1.78;color:var(--mute);
  padding:0 60px 26px 4px;margin:0;
}

/* ---------- 15. 收尾 ---------- */
.cta{
  position:relative;overflow:hidden;background:var(--bg-dark);
  padding:126px 0 132px;
}
.cta-glow{position:absolute;inset:0;pointer-events:none;overflow:hidden;}
.cta .blob{opacity:.8;}
.d1{width:720px;height:720px;background:rgba(0,113,227,.34);top:-300px;left:50%;margin-left:-360px;animation:drift1 26s ease-in-out infinite;}
.d2{width:460px;height:460px;background:rgba(64,200,244,.20);bottom:-250px;left:14%;animation:drift2 32s ease-in-out infinite;}
.cta .wrap{position:relative;z-index:2;}
.cta .h2{max-width:720px;margin:0 auto;letter-spacing:-.028em;}
.cta .lede{margin-top:24px;}
.cta .hero-actions{margin-top:40px;}

/* ---------- 16. 页脚 ---------- */
.foot{background:var(--bg-soft);padding:66px 0 34px;border-top:1px solid var(--line-soft);}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.foot-brand p{font-size:13.5px;color:var(--mute);margin-top:15px;}
.foot-col{display:flex;flex-direction:column;gap:12px;}
.foot-col h4{font-size:13px;font-weight:600;color:var(--ink);letter-spacing:-.01em;margin-bottom:3px;}
.foot-col a{font-size:13.5px;color:var(--mute);transition:color .3s var(--ease-2);}
.foot-col a:hover{color:var(--blue);}
.foot-bottom{
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line);
}
.foot-bottom p{font-size:12.5px;color:var(--mute-2);}
.foot-switch{
  color:var(--mute);border-bottom:1px solid var(--line);
  padding-bottom:1px;transition:color .3s var(--ease-2),border-color .3s var(--ease-2);
}
.foot-switch:hover{color:var(--blue);border-color:var(--blue);}

/* ---------- 17. 响应式 ---------- */
@media(max-width:1068px){
  .hero-wrap{grid-template-columns:1fr;gap:64px;}
  .hero-copy{max-width:620px;}
  .hero-copy .lede{max-width:520px;}
  .mock{transform:none;}
  .feat-grid{grid-template-columns:repeat(2,1fr);}
  .pillars{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,1fr);gap:34px 26px;}
  .steps::before{display:none;}
  .plans{grid-template-columns:1fr;max-width:460px;margin-left:auto;margin-right:auto;}
  .plan-hot{order:-1;}
}

@media(max-width:833px){
  .nav-links,.nav-actions{display:none;}
  .nav-toggle{display:flex;}
  .nav.open .nav-mobile{display:flex;}
  .nav.open{background:rgba(251,251,253,.96);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:38px 20px;}
  .mission,.features,.flow,.pricing,.faq{padding:88px 0;}
  .mission-cols{grid-template-columns:1fr;gap:24px;margin-top:34px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:34px;}
}

@media(max-width:734px){
  .wrap{padding:0 20px;}
  .nav-inner{padding:0 20px;}
  body{font-size:16px;}
  .hero{padding:calc(var(--nav-h) + 52px) 0 72px;}
  .hero-actions{gap:11px;}
  .hero-actions .btn{flex:1 1 100%;justify-content:center;}
  .hero-notes{gap:8px 20px;margin-top:28px;}
  .feat-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;gap:32px;}
  .mock-body{grid-template-columns:38px 1fr;}
  .mock-main{padding:15px 14px 17px;}
  .mrow{grid-template-columns:82px 1fr 30px;gap:8px;}
  .faq-a p{padding-right:20px;}
  .faq-q{font-size:16.5px;padding:21px 2px;}
  .cta{padding:92px 0 96px;}
  .stats{padding:44px 0;}
  .plan-desc{min-height:0;margin-top:11px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px 20px;}
  .foot-brand{grid-column:1 / -1;}
}

/* ---------- 18. 降低动效偏好 ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .js .reveal{opacity:1;transform:none;}
  .chart-line{stroke-dashoffset:0;}
  .chart-area{opacity:1;}
  .mbar i{width:var(--w);}
}