/* ============================================================
   言讯AI 官网 — 样式表
   ============================================================ */

:root{
  --brand:#2E5BFF;
  --brand-2:#7B5CFF;
  --brand-soft:#EEF2FF;
  --accent:#00B8A9;
  --ink:#0E1526;
  --ink-2:#3A4459;
  --ink-3:#6B7689;
  --line:#E7EAF2;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FC;
  --radius:16px;
  --radius-lg:24px;
  --shadow-sm:0 2px 8px rgba(16,24,40,.06);
  --shadow:0 10px 30px rgba(16,24,40,.08);
  --shadow-lg:0 24px 60px rgba(16,24,40,.14);
  --maxw:1200px;
  --nav-h:72px;
}

*{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth;scroll-padding-top:var(--nav-h)}

body{
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4,h5{line-height:1.25;font-weight:700;letter-spacing:-.01em}
p{color:var(--ink-2)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

.grad{
  background:linear-gradient(100deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;font-weight:600;white-space:nowrap;
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s,background .22s,color .22s,border-color .22s;
}
.btn--sm{padding:9px 18px;font-size:14px}
.btn--lg{padding:14px 30px;font-size:16px}
.btn--primary{
  background:linear-gradient(100deg,var(--brand),var(--brand-2));
  color:#fff;box-shadow:0 8px 22px rgba(46,91,255,.28);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(46,91,255,.38)}
.btn--ghost{background:rgba(46,91,255,.08);color:var(--brand)}
.btn--ghost:hover{background:rgba(46,91,255,.14)}
.btn--outline{border:1.5px solid rgba(255,255,255,.35);color:#fff}
.btn--outline:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);
  background:rgba(255,255,255,.72);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:background .3s,border-color .3s,box-shadow .3s;
}
.nav.is-stuck{background:rgba(255,255,255,.94);border-bottom-color:var(--line);box-shadow:var(--shadow-sm)}
.nav__inner{height:var(--nav-h);display:flex;align-items:center;gap:32px}

.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo__mark{width:34px;height:34px;display:block;flex:0 0 34px}
.logo__mark svg{width:100%;height:100%;display:block}
.logo__ai{background:linear-gradient(100deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}

.nav__menu{display:flex;gap:30px;margin-right:auto}
.nav__menu a{
  font-size:15px;color:var(--ink-2);font-weight:500;position:relative;padding:4px 0;transition:color .2s;
}
.nav__menu a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:right .25s;
}
.nav__menu a:hover{color:var(--brand)}
.nav__menu a:hover::after{right:0}

.nav__actions{display:flex;gap:10px}

.nav__toggle{display:none;width:40px;height:40px;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.nav__toggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.nav__toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle.is-open span:nth-child(2){opacity:0}
.nav__toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:calc(var(--nav-h) + 72px) 0 0;
  background:linear-gradient(180deg,#F4F7FF 0%,#FFFFFF 62%);
  overflow:hidden;
}
.hero__bg{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5}
.orb--1{width:520px;height:520px;background:#6C9BFF;top:-180px;left:-120px}
.orb--2{width:460px;height:460px;background:#B79BFF;top:60px;right:-140px}
.orb--3{width:380px;height:380px;background:#7EE3DA;bottom:-160px;left:38%;opacity:.35}
.grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(46,91,255,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(46,91,255,.055) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at 50% 0%,#000 35%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 35%,transparent 78%);
}

.hero__inner{
  position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding-bottom:72px;
}
.tag{
  display:inline-block;padding:7px 16px;border-radius:999px;font-size:13px;font-weight:600;
  color:var(--brand);background:rgba(46,91,255,.09);border:1px solid rgba(46,91,255,.16);
  margin-bottom:22px;
}
.hero h1{font-size:clamp(34px,4.4vw,58px);line-height:1.18;letter-spacing:-.03em}
.hero__desc{margin-top:22px;font-size:17.5px;color:var(--ink-2);max-width:560px}
.hero__btns{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero__points{display:flex;gap:22px;margin-top:28px;list-style:none;flex-wrap:wrap}
.hero__points li{font-size:14px;color:var(--ink-3);display:flex;align-items:center;gap:7px}
.hero__points li::before{
  content:"";width:18px;height:18px;border-radius:50%;flex:0 0 18px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:inset 0 0 0 4px #fff;
}

/* 聊天 mockup */
.hero__visual{position:relative}
.chat{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);overflow:hidden;position:relative;z-index:2;
}
.chat__bar{
  display:flex;align-items:center;gap:7px;padding:14px 18px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#FBFCFF,#F7F9FF);
}
.dot{width:10px;height:10px;border-radius:50%;display:block}
.dot--r{background:#FF5F57}.dot--y{background:#FEBC2E}.dot--g{background:#28C840}
.chat__title{margin-left:10px;font-size:13.5px;font-weight:600;color:var(--ink-2)}
.chat__status{
  margin-left:auto;font-size:12px;color:#16A34A;display:flex;align-items:center;gap:6px;font-weight:600;
}
.chat__status i{width:7px;height:7px;border-radius:50%;background:#16A34A;box-shadow:0 0 0 3px rgba(22,163,74,.18)}
.chat__body{padding:20px;display:flex;flex-direction:column;gap:12px;background:#fff}
.msg{font-size:14px;max-width:86%;padding:11px 15px;border-radius:14px;line-height:1.6}
.msg--ai{align-self:flex-start;background:var(--bg-soft);color:var(--ink-2);border-top-left-radius:4px}
.msg--user{align-self:flex-end;background:linear-gradient(100deg,var(--brand),var(--brand-2));color:#fff;border-top-right-radius:4px}
.msg--card{background:transparent;padding:0}
.msg__typing{display:inline-flex;gap:4px;margin-right:8px;vertical-align:middle}
.msg__typing i{width:6px;height:6px;border-radius:50%;background:var(--brand);animation:blink 1.2s infinite}
.msg__typing i:nth-child(2){animation-delay:.2s}
.msg__typing i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,100%{opacity:.25;transform:translateY(0)}50%{opacity:1;transform:translateY(-3px)}}

.mini-card{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow-sm);
}
.mini-card__hd{font-size:13px;font-weight:700;margin-bottom:12px}
.mini-bars{display:flex;flex-direction:column;gap:9px}
.mini-bar{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--ink-2)}
.mini-bar span{width:62px;flex:0 0 62px}
.mini-bar i{
  flex:1;height:8px;border-radius:99px;background:var(--line);position:relative;overflow:hidden;
}
.mini-bar i::after{
  content:"";position:absolute;inset:0;width:var(--w);border-radius:99px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.mini-bar b{width:38px;text-align:right;font-weight:700;color:var(--ink)}
.mini-card__ft{margin-top:12px;padding-top:11px;border-top:1px dashed var(--line);font-size:12px;color:var(--ink-3)}

.chat__input{
  display:flex;align-items:center;gap:10px;padding:12px 16px;border-top:1px solid var(--line);
  background:#FBFCFF;
}
.chat__input span{flex:1;font-size:13.5px;color:#A0A8BC}
.send{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.send svg{width:17px;height:17px}

.float-badge{
  position:absolute;z-index:3;background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:11px 16px;font-size:12.5px;color:var(--ink-3);box-shadow:var(--shadow);line-height:1.45;
}
.float-badge b{color:var(--brand);font-size:15px}
.float-badge--1{left:-48px;bottom:52px;animation:float 5s ease-in-out infinite}
.float-badge--2{right:-34px;top:26px;animation:float 6s ease-in-out infinite .8s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* 数据条 */
.stats{
  position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:30px 20px;margin-bottom:-56px;
}
.stat{text-align:center;position:relative}
.stat::after{content:"";position:absolute;right:0;top:12%;height:76%;width:1px;background:var(--line)}
.stat:last-child::after{display:none}
.stat b{font-size:34px;font-weight:800;letter-spacing:-.03em;color:var(--ink)}
.stat span{font-size:20px;font-weight:700;color:var(--brand)}
.stat p{margin-top:4px;font-size:13.5px;color:var(--ink-3)}

/* ---------- 通用区块 ---------- */
.section{padding:110px 0;position:relative}
.section--soft{background:var(--bg-soft)}
.section--dark{background:linear-gradient(160deg,#101733,#0B1020 60%,#141A38);color:#fff}
.section--dark p{color:rgba(255,255,255,.68)}

.shead{max-width:720px;margin:0 auto 58px;text-align:center}
.shead__eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--brand);
  text-transform:uppercase;margin-bottom:14px;
}
.shead h2{font-size:clamp(26px,3.2vw,40px);letter-spacing:-.02em}
.shead p{margin-top:16px;font-size:16.5px;color:var(--ink-3)}
.shead--light .shead__eyebrow{color:#8FB4FF}
.shead--light h2{color:#fff}

/* ---------- 能力卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 26px;
  transition:transform .3s cubic-bezier(.2,.7,.3,1),box-shadow .3s,border-color .3s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card__icon{
  width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:20px;
  background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;
  box-shadow:0 10px 22px rgba(46,91,255,.16);
}
.card__icon svg{width:25px;height:25px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{font-size:14.8px;color:var(--ink-2)}

/* ---------- 产品矩阵 ---------- */
.feat{
  display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;
  padding:44px 0;border-bottom:1px solid var(--line);
}
.feat:last-of-type{border-bottom:none}
.feat--rev .feat__text{order:2}
.feat--rev .feat__vis{order:1}
.feat__no{
  font-size:44px;font-weight:800;line-height:1;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;opacity:.32;
  display:block;margin-bottom:8px;
}
.feat h3{font-size:26px;margin-bottom:14px}
.feat h3 em{
  font-style:normal;font-size:14px;font-weight:600;color:var(--brand);margin-left:10px;
  background:rgba(46,91,255,.09);padding:4px 10px;border-radius:6px;vertical-align:middle;
}
.feat p{font-size:16px;margin-bottom:20px}

.ticks{list-style:none;display:flex;flex-direction:column;gap:11px}
.ticks li{font-size:15px;color:var(--ink-2);display:flex;gap:10px;align-items:flex-start}
.ticks li::before{
  content:"";width:19px;height:19px;flex:0 0 19px;margin-top:4px;border-radius:50%;
  background:rgba(46,91,255,.12) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232E5BFF' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/12px no-repeat;
}

/* 面板 */
.panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);overflow:hidden;
}
.panel__hd{
  display:flex;align-items:center;gap:6px;padding:13px 16px;background:#F7F9FF;border-bottom:1px solid var(--line);
}
.panel__hd i{width:9px;height:9px;border-radius:50%;background:#D9DEEA;display:block}
.panel__hd i:nth-child(1){background:#FF5F57}
.panel__hd i:nth-child(2){background:#FEBC2E}
.panel__hd i:nth-child(3){background:#28C840}
.panel__file{margin-left:10px;font-size:12px;color:var(--ink-3);font-family:ui-monospace,Consolas,monospace}
.panel__bd{padding:24px}
.panel__note{margin-top:18px;font-size:12.5px;color:var(--ink-3);text-align:center}

.line{height:9px;border-radius:99px;background:var(--bg-soft);width:var(--w);margin:12px 0}
.line:nth-child(odd){background:#EDF1F9}
.chip-row{display:flex;margin:16px 0}
.chip{padding:9px 14px;border-radius:12px;font-size:13.5px;max-width:88%}
.chip--ai{align-self:flex-start;background:var(--bg-soft);color:var(--ink-2);border-top-left-radius:3px}
.chip--user{margin-left:auto;background:linear-gradient(100deg,var(--brand),var(--brand-2));color:#fff;border-top-right-radius:3px;text-align:right}

.krow{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.kdot{width:10px;height:10px;border-radius:3px;background:var(--c);flex:0 0 10px}
.kbar{flex:1;height:22px;border-radius:7px;background:var(--bg-soft);position:relative;overflow:hidden}
.kbar::after{
  content:"";position:absolute;inset:0;width:var(--w);border-radius:7px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));opacity:.85;
}
.krow b{font-size:13px;font-weight:600;color:var(--ink-2);width:66px;text-align:right}

.flow{display:flex;align-items:center;gap:10px;justify-content:center;margin-bottom:14px}
.flow--2{margin-bottom:0}
.node{
  padding:9px 14px;border-radius:10px;font-size:13px;font-weight:600;background:var(--bg-soft);
  color:var(--ink-2);border:1px solid var(--line);white-space:nowrap;
}
.node--ai{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-color:transparent}
.node--sys{background:rgba(0,184,169,.1);color:#00A096;border-color:rgba(0,184,169,.25)}
.arrow{color:var(--ink-3);font-size:15px}

.panel--code{background:#0F162E;border-color:#0F162E}
.panel--code .panel__hd{background:#151D38;border-bottom-color:#242E52}
.panel--code .panel__hd i:nth-child(1){background:#FF5F57}
.code{
  font-family:ui-monospace,Consolas,"Courier New",monospace;font-size:13px;line-height:1.85;
  color:#C9D4F0;white-space:pre-wrap;word-break:break-word;padding:4px 0;
}
.c-k{color:#C792EA}.c-f{color:#82AAFF}.c-s{color:#C3E88D}.c-t{color:#FFCB6B}

/* ---------- 解决方案 tabs ---------- */
.tabs{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:36px}
.tab{
  padding:10px 22px;border-radius:999px;font-size:15px;font-weight:600;color:var(--ink-2);
  background:#fff;border:1px solid var(--line);transition:.25s;
}
.tab:hover{border-color:var(--brand);color:var(--brand)}
.tab.is-active{background:linear-gradient(100deg,var(--brand),var(--brand-2));color:#fff;border-color:transparent;box-shadow:0 8px 20px rgba(46,91,255,.24)}

.tabpanes{position:relative}
.tabpane{display:none;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:44px;box-shadow:var(--shadow)}
.tabpane.is-active{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;animation:fadeUp .4s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.tabpane h3{font-size:24px;margin-bottom:14px}
.tabpane p{font-size:16px;margin-bottom:20px}
.tabpane__kpi{display:flex;gap:18px;flex-direction:column}
.kpi{
  background:linear-gradient(135deg,rgba(46,91,255,.07),rgba(123,92,255,.09));
  border:1px solid rgba(46,91,255,.14);border-radius:var(--radius);padding:22px 30px;text-align:center;min-width:170px;
}
.kpi b{
  display:block;font-size:30px;font-weight:800;letter-spacing:-.02em;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.kpi span{font-size:13px;color:var(--ink-3)}

/* ---------- 安全合规 ---------- */
.sec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.sec-item{
  padding:30px 26px;border-radius:var(--radius-lg);
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.11);
  transition:.3s;
}
.sec-item:hover{background:rgba(255,255,255,.09);transform:translateY(-5px);border-color:rgba(255,255,255,.24)}
.sec-item h4{
  font-size:18px;color:#fff;margin-bottom:10px;padding-bottom:14px;position:relative;
}
.sec-item h4::after{
  content:"";position:absolute;left:0;bottom:0;width:36px;height:3px;border-radius:2px;
  background:linear-gradient(90deg,#5B8CFF,#A78BFA);
}
.sec-item p{font-size:14.5px}

/* ---------- 客户案例 ---------- */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px 28px;
  transition:.3s;position:relative;overflow:hidden;
}
.case::before{
  content:"";position:absolute;left:0;top:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.case__tag{
  display:inline-block;font-size:12.5px;font-weight:700;color:var(--brand);
  background:rgba(46,91,255,.09);padding:5px 12px;border-radius:6px;margin-bottom:16px;
}
.case h3{font-size:19px;margin-bottom:12px}
.case p{font-size:14.8px;margin-bottom:22px}
.case__nums{display:flex;gap:26px;padding-top:18px;border-top:1px solid var(--line)}
.case__nums b{
  display:block;font-size:21px;font-weight:800;color:var(--ink);letter-spacing:-.02em;
}
.case__nums span{font-size:12.5px;color:var(--ink-3)}

/* ---------- 关于言讯 ---------- */
.about{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start}
.about__text h2{font-size:32px;margin:12px 0 20px}
.about__text p{font-size:16px;margin-bottom:16px}
.about__text strong{color:var(--ink)}

.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:32px 30px;box-shadow:var(--shadow-sm);
}
.contact-card h4{
  font-size:17px;margin-bottom:18px;padding-bottom:16px;border-bottom:1px solid var(--line);
}
.contact-row{
  display:flex;align-items:baseline;gap:16px;padding:12px 0;transition:color .2s;
}
.contact-row span{font-size:13.5px;color:var(--ink-3);width:40px;flex:0 0 40px}
.contact-row b{font-size:16.5px;color:var(--ink);font-weight:600;letter-spacing:-.01em}
.contact-row:not(.contact-row--plain):hover b{color:var(--brand)}
.contact-row--plain b{font-size:15px}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;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:20px;
  padding:22px 4px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink);
}
.faq__q i{
  width:22px;height:22px;flex:0 0 22px;border-radius:50%;position:relative;
  border:1.5px solid var(--line);transition:.3s;
}
.faq__q i::before,.faq__q i::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;transition:.3s;
  left:50%;top:50%;transform:translate(-50%,-50%);
}
.faq__q i::before{width:10px;height:1.8px}
.faq__q i::after{width:1.8px;height:10px}
.faq__item.is-open .faq__q i{background:var(--brand);border-color:var(--brand)}
.faq__item.is-open .faq__q i::before,.faq__item.is-open .faq__q i::after{background:#fff}
.faq__item.is-open .faq__q i::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq__a p{padding:0 4px 22px;font-size:15.5px;color:var(--ink-2)}

/* ---------- CTA ---------- */
.cta{
  padding:96px 0;background:linear-gradient(135deg,#122042,#0B1020 55%,#1B2450);color:#fff;text-align:center;
}
.cta h2{font-size:clamp(26px,3.4vw,40px);letter-spacing:-.02em}
.cta p{margin-top:16px;font-size:16.5px;color:rgba(255,255,255,.7)}
.cta__form{
  display:flex;gap:12px;justify-content:center;margin-top:38px;flex-wrap:wrap;max-width:820px;margin-left:auto;margin-right:auto;
}
.cta__form input{
  flex:1 1 200px;min-width:180px;padding:14px 18px;border-radius:12px;font-size:15px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);color:#fff;outline:none;
  font-family:inherit;transition:.25s;
}
.cta__form input::placeholder{color:rgba(255,255,255,.42)}
.cta__form input:focus{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.4)}
.cta__contacts{
  display:flex;gap:28px;justify-content:center;margin-top:26px;flex-wrap:wrap;
  font-size:14px;color:rgba(255,255,255,.6);
}
.cta__contacts a{color:rgba(255,255,255,.88);border-bottom:1px solid rgba(255,255,255,.25)}
.cta__contacts a:hover{color:#8FB4FF;border-bottom-color:#8FB4FF}
.cta__tip{margin-top:18px;font-size:14.5px;color:#7EE3DA;font-weight:600}

/* ---------- 页脚 ---------- */
.footer{background:#080C1A;color:rgba(255,255,255,.62);padding:66px 0 28px}
.footer__inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.logo--footer .logo__text{color:#fff}
.logo--footer .logo__ai{background:none;-webkit-text-fill-color:#8FB4FF;color:#8FB4FF}
.footer__col p{margin-top:16px;font-size:14px;color:rgba(255,255,255,.5);line-height:1.8}
.footer__col h5{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer__col a{display:block;font-size:14px;padding:5px 0;transition:color .2s}
.footer__col a:hover{color:#8FB4FF}
.footer__bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:26px;border-top:1px solid rgba(255,255,255,.09);font-size:13.5px;
}
.footer__bottom a:hover{color:#8FB4FF}

/* ---------- 进场动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero__inner{grid-template-columns:1fr;gap:44px}
  .hero__visual{max-width:520px}
  .float-badge--1{left:0}
  .float-badge--2{right:0}
  .cards{grid-template-columns:repeat(2,1fr)}
  .cases{grid-template-columns:1fr}
  .sec-grid{grid-template-columns:repeat(2,1fr)}
  .feat,.about{grid-template-columns:1fr;gap:36px}
  .feat--rev .feat__text,.feat--rev .feat__vis{order:initial}
  .footer__inner{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav__menu{
    position:fixed;top:var(--nav-h);left:0;right:0;flex-direction:column;gap:0;
    background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 20px;
    box-shadow:var(--shadow);transform:translateY(-12px);opacity:0;pointer-events:none;transition:.28s;
  }
  .nav__menu.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav__menu a{padding:14px 0;border-bottom:1px solid var(--line);font-size:16px}
  .nav__actions{display:none}
  .nav__toggle{display:flex;margin-left:auto}
  .section{padding:76px 0}
  .stats{grid-template-columns:repeat(2,1fr);gap:26px;margin-bottom:0}
  .stat::after{display:none}
  .cards{grid-template-columns:1fr}
  .sec-grid{grid-template-columns:1fr}
  .tabpane,.tabpane.is-active{grid-template-columns:1fr;padding:30px 24px}
  .tabpane__kpi{flex-direction:row}
  .kpi{flex:1;min-width:0}
  .hero{padding-top:calc(var(--nav-h) + 40px)}
  .hero__points{gap:14px}
  .footer__inner{grid-template-columns:1fr}
  .cta__form{flex-direction:column}
}
@media (max-width:420px){
  .float-badge{display:none}
  .hero__btns{flex-direction:column;align-items:stretch}
  .btn--lg{width:100%}
}