/* ============================================================
   深度企业知识库 · rag.fde.sd.cn
   RAG + WIKI + 大模型 企业知识库
   主色沿用深度探知品牌：深墨蓝 #0c1420 / 品牌蓝 #14508c
   ============================================================ */

:root{
  --ink:#0c1420; --ink-2:#3d4b5c; --ink-3:#74839a; --ink-4:#9aa7b8;
  --brand:#14508c; --brand-2:#2f7fd1; --brand-3:#5aa7ef;
  --cyan:#12a8bd; --green:#1e9e6a; --amber:#d98324; --violet:#6b5ce7;
  --bg:#f4f7fb; --bg-2:#eef2f8; --card:#ffffff;
  --line:rgba(12,20,32,.09); --line-2:rgba(12,20,32,.055);
  --radius:16px; --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(12,20,32,.05), 0 12px 28px -18px rgba(12,20,32,.30);
  --shadow-2:0 2px 6px rgba(12,20,32,.06), 0 26px 54px -22px rgba(12,20,32,.34);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:var(--font);
  color:var(--ink); background:var(--bg);
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden; line-height:1.72;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button,input,textarea{font:inherit;color:inherit}
::selection{background:rgba(20,80,140,.18)}

.wrap{width:min(1200px,calc(100% - 44px));margin:0 auto}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.ico{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
.ico--sm{width:18px;height:18px;stroke-width:1.9}

.skip{position:absolute;left:-9999px;top:0;background:#fff;color:var(--ink);padding:10px 16px;z-index:200}
.skip:focus{left:12px;top:12px}

/* ───────────────── 导航 ───────────────── */
.header{
  position:fixed; inset:0 0 auto 0; z-index:90;
  background:rgba(12,20,32,.82);
  backdrop-filter:saturate(160%) blur(14px); -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background .3s ease, box-shadow .3s ease;
}
.header.is-stuck{background:rgba(12,20,32,.95);box-shadow:0 10px 30px -18px rgba(0,0,0,.8)}
.header__in{display:flex;align-items:center;gap:22px;height:66px}

.brand{display:flex;align-items:center;gap:11px;color:#fff}
.brand__mark{width:34px;height:34px;flex:none}
.brand__text{display:flex;flex-direction:column;line-height:1.25}
.brand__text strong{font-size:16px;letter-spacing:.4px}
.brand__text small{font-size:11px;color:rgba(255,255,255,.55);letter-spacing:1.6px}

.nav{margin-left:auto}
.nav__list{display:flex;align-items:center;gap:4px}
.nav__link{
  display:block;padding:8px 13px;border-radius:8px;font-size:14px;color:rgba(255,255,255,.76);
  transition:color .2s,background .2s;white-space:nowrap;
}
.nav__link:hover,.nav__link.is-active{color:#fff;background:rgba(255,255,255,.09)}
.header__tel{
  margin-left:14px;padding:8px 18px;border-radius:999px;font-size:14px;font-weight:600;
  background:linear-gradient(135deg,var(--brand-2),#4a92e8);color:#fff;
  box-shadow:0 6px 18px -8px rgba(47,127,209,.9);transition:transform .2s,box-shadow .2s;
}
.header__tel:hover{transform:translateY(-1px);box-shadow:0 10px 24px -8px rgba(47,127,209,1)}

.navtoggle{display:none;width:40px;height:40px;margin-left:auto;border:0;background:rgba(255,255,255,.08);border-radius:9px;cursor:pointer;padding:0}
.navtoggle span{display:block;width:17px;height:2px;background:#fff;border-radius:2px;margin:3.5px auto;transition:transform .25s,opacity .2s}
.navtoggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.navtoggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.navtoggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* ───────────────── HERO ───────────────── */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:radial-gradient(1100px 620px at 76% 8%,#1a4a80 0%,transparent 60%),
             radial-gradient(760px 520px at 8% 92%,#13406d 0%,transparent 62%),
             linear-gradient(168deg,#0c1420 0%,#0f1c2e 48%,#0a121d 100%);
  padding:132px 0 86px;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 32%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 32%,#000 0%,transparent 78%);
}
.hero__glow{position:absolute;width:520px;height:520px;right:-140px;top:-170px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,127,209,.34),transparent 68%);filter:blur(10px);pointer-events:none}

.hero__in{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:52px;align-items:center}

.hero__tag{
  display:inline-flex;align-items:center;gap:9px;padding:6px 15px 6px 8px;border-radius:999px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  font-size:12.5px;color:rgba(255,255,255,.84);letter-spacing:.4px;margin-bottom:24px;
}
.hero__tag b{background:linear-gradient(135deg,var(--brand-3),#8fd0ff);color:#06203a;font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;letter-spacing:.6px}

.hero__title{font-size:clamp(34px,4.6vw,58px);line-height:1.16;font-weight:800;letter-spacing:-.5px}
.hero__title em{
  font-style:normal;
  background:linear-gradient(100deg,#7cc0ff 0%,#4a9ae8 42%,#22c3d6 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero__lead{margin-top:22px;font-size:16.5px;line-height:1.86;color:rgba(255,255,255,.76);max-width:560px}
.hero__lead b{color:#fff;font-weight:600}

.hero__stack{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
.chipstack{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);
  font-size:12.5px;color:rgba(255,255,255,.8);
}
.chip i{width:6px;height:6px;border-radius:50%;background:var(--brand-3);box-shadow:0 0 0 3px rgba(90,167,239,.2)}
.chip:nth-child(2) i{background:#22c3d6;box-shadow:0 0 0 3px rgba(34,195,214,.2)}
.chip:nth-child(3) i{background:#8b7bf0;box-shadow:0 0 0 3px rgba(139,123,240,.2)}

.hero__actions{display:flex;flex-wrap:wrap;gap:13px;margin-top:34px}
.btn{
  display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:11px;
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .2s,box-shadow .2s,background .2s;
}
.btn--p{background:linear-gradient(135deg,var(--brand-2),#4a92e8);color:#fff;box-shadow:0 12px 28px -12px rgba(47,127,209,.95)}
.btn--p:hover{transform:translateY(-2px);box-shadow:0 18px 34px -12px rgba(47,127,209,1)}
.btn--g{border-color:rgba(255,255,255,.28);color:#fff;background:rgba(255,255,255,.05)}
.btn--g:hover{background:rgba(255,255,255,.13);transform:translateY(-2px)}
.btn--d{background:var(--brand);color:#fff}
.btn--d:hover{transform:translateY(-2px);box-shadow:0 14px 30px -14px rgba(20,80,140,.9)}
.btn--o{border-color:rgba(12,20,32,.18);color:var(--ink);background:#fff}
.btn--o:hover{border-color:var(--brand-2);color:var(--brand);transform:translateY(-2px)}

.hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:46px;max-width:640px}
.hstat{padding:14px 16px;border-radius:12px;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.1)}
.hstat b{display:block;font-size:22px;font-weight:800;letter-spacing:-.4px;color:#fff;line-height:1.3}
.hstat b span{font-size:12px;font-weight:600;color:var(--brand-3);margin-left:2px}
.hstat small{font-size:11.5px;color:rgba(255,255,255,.52)}

/* Hero 演示面板 */
.panel{
  border-radius:20px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.12);
  box-shadow:0 30px 70px -30px rgba(0,0,0,.85);overflow:hidden;backdrop-filter:blur(8px);
}
.panel__bar{display:flex;align-items:center;gap:8px;padding:11px 16px;background:rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.1)}
.panel__dot{width:10px;height:10px;border-radius:50%}
.panel__bar span{font-size:12px;color:rgba(255,255,255,.5);margin-left:6px;font-family:var(--mono)}
.panel__body{padding:18px}

.askrow{display:flex;gap:10px;align-items:center;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);border-radius:12px;padding:11px 14px}
.askrow svg{width:17px;height:17px;stroke:var(--brand-3);fill:none;stroke-width:2;flex:none}
.askrow p{font-size:14px;color:rgba(255,255,255,.9);line-height:1.5}
.askrow .caret{display:inline-block;width:1.5px;height:15px;background:var(--brand-3);vertical-align:-2px;animation:blink 1.05s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

.flow{display:grid;gap:8px;margin-top:16px}
.flowstep{
  display:grid;grid-template-columns:26px 1fr auto;align-items:center;gap:11px;
  padding:10px 13px;border-radius:11px;background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.09);opacity:0;transform:translateX(-8px);
  animation:slidein .45s ease forwards;
}
.flowstep__n{width:24px;height:24px;border-radius:7px;display:grid;place-items:center;font-size:11px;font-weight:700;font-family:var(--mono)}
.flowstep b{font-size:13.5px;font-weight:600;display:block;line-height:1.4}
.flowstep small{font-size:11.5px;color:rgba(255,255,255,.48);display:block;line-height:1.45}
.flowstep em{font-style:normal;font-size:11px;color:rgba(255,255,255,.4);font-family:var(--mono);white-space:nowrap}
.flowstep:nth-child(1) .flowstep__n{background:rgba(47,127,209,.24);color:#8fd0ff}
.flowstep:nth-child(2) .flowstep__n{background:rgba(18,168,189,.22);color:#5fd8e6}
.flowstep:nth-child(3) .flowstep__n{background:rgba(107,92,231,.24);color:#b3a9ff}
.flowstep:nth-child(4) .flowstep__n{background:rgba(30,158,106,.24);color:#5fd6a0}
@keyframes slidein{to{opacity:1;transform:none}}

.answer{margin-top:14px;padding:15px;border-radius:12px;background:rgba(18,168,189,.09);border:1px solid rgba(18,168,189,.28);display:none}
.answer.is-on{display:block}
.answer__hd{display:flex;align-items:center;gap:7px;font-size:11.5px;color:#7fe0ec;letter-spacing:.6px;font-weight:600;margin-bottom:8px}
.answer__hd i{width:6px;height:6px;border-radius:50%;background:#7fe0ec;box-shadow:0 0 0 3px rgba(18,168,189,.22)}
.answer p{font-size:13.5px;color:rgba(255,255,255,.85);line-height:1.72}
.cites{display:flex;flex-wrap:wrap;gap:7px;margin-top:11px}
.cite{font-size:11px;padding:4px 9px;border-radius:6px;background:rgba(255,255,255,.1);color:rgba(255,255,255,.72);font-family:var(--mono)}
.cite b{color:#8fd0ff;font-weight:600}

/* ───────────────── 通用分区 ───────────────── */
.sec{padding:96px 0;position:relative}
.sec--soft{background:var(--bg-2)}
.sec--dark{background:linear-gradient(168deg,#0c1420,#111d2e);color:#fff}
.sec--dark .sec__sub{color:rgba(255,255,255,.66)}
.sec--dark .sec__title{color:#fff}

.sec__hd{max-width:760px;margin-bottom:52px}
.sec__hd--c{margin-left:auto;margin-right:auto;text-align:center}
.label{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:2.2px;color:var(--brand-2);
  text-transform:uppercase;margin-bottom:15px;position:relative;padding-left:20px;
}
.label::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:11px;height:2px;background:var(--brand-2);border-radius:2px}
.label--light{color:#7fd4ff}
.label--light::before{background:#7fd4ff}
.sec__title{font-size:clamp(26px,3.2vw,40px);line-height:1.32;font-weight:800;letter-spacing:-.4px}
.sec__sub{margin-top:17px;font-size:16px;color:var(--ink-2);line-height:1.86}
.sec--dark .sec__sub{color:rgba(255,255,255,.62)}

/* ───────────────── 三引擎 ───────────────── */
.engines{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.engine{
  position:relative;padding:32px 28px 30px;background:var(--card);border-radius:var(--radius);
  border:1px solid var(--line);box-shadow:var(--shadow-1);overflow:hidden;
  transition:transform .3s,box-shadow .3s;
}
.engine:hover{transform:translateY(-5px);box-shadow:var(--shadow-2)}
.engine::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:var(--grad)}
.engine--r{--grad:linear-gradient(90deg,#2f7fd1,#5aa7ef)}
.engine--w{--grad:linear-gradient(90deg,#12a8bd,#48cbd8)}
.engine--l{--grad:linear-gradient(90deg,#6b5ce7,#9b8cf5)}
.engine__tag{
  position:absolute;right:20px;top:20px;font-family:var(--mono);font-size:11px;font-weight:700;
  color:#fff;padding:3px 9px;border-radius:6px;letter-spacing:.5px;
}
.engine--r .engine__tag{background:#2f7fd1}
.engine--w .engine__tag{background:#12a8bd}
.engine--l .engine__tag{background:#6b5ce7}
.engine__ico{width:48px;height:48px;border-radius:13px;display:grid;place-items:center;margin-bottom:20px}
.engine--r .engine__ico{background:rgba(47,127,209,.11);color:#2f7fd1}
.engine--w .engine__ico{background:rgba(18,168,189,.12);color:#12a8bd}
.engine--l .engine__ico{background:rgba(107,92,231,.11);color:#6b5ce7}
.engine__ico .ico{width:25px;height:25px}
.engine h3{font-size:19px;font-weight:700;margin-bottom:6px;letter-spacing:.2px}
.engine .en{font-size:11.5px;color:var(--ink-4);font-family:var(--mono);letter-spacing:1px;margin-bottom:14px;display:block}
.engine p{font-size:14.5px;color:var(--ink-2);line-height:1.8}
.engine ul{margin-top:18px;padding-top:16px;border-top:1px dashed var(--line)}
.engine li{position:relative;padding-left:19px;font-size:13.5px;color:var(--ink-2);line-height:1.7;margin-bottom:7px}
.engine li::before{content:"";position:absolute;left:3px;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand-3)}

/* ───────────────── 架构流程 ───────────────── */
.arch{background:linear-gradient(168deg,#0c1420,#132339);border-radius:22px;padding:44px 40px;color:#fff;box-shadow:var(--shadow-2)}
.arch__hd{text-align:center;margin-bottom:36px}
.arch__hd h3{font-size:24px;font-weight:800}
.arch__hd p{margin-top:9px;color:rgba(255,255,255,.6);font-size:14.5px}
.pipe{display:flex;align-items:stretch;gap:0;flex-wrap:wrap}
.pipe__col{flex:1 1 0;min-width:150px;padding:0 9px;position:relative}
.pipe__col:not(:last-child)::after{
  content:"";position:absolute;right:-5px;top:50%;width:10px;height:10px;
  border-top:2px solid rgba(255,255,255,.28);border-right:2px solid rgba(255,255,255,.28);
  transform:translateY(-50%) rotate(45deg);
}
.pipe__hd{display:flex;align-items:center;gap:9px;margin-bottom:14px}
.pipe__hd b{font-size:13.5px;font-weight:700}
.pipe__hd i{width:22px;height:22px;border-radius:6px;display:grid;place-items:center;font-style:normal;font-size:11px;font-family:var(--mono);font-weight:700;flex:none}
.pipe__col:nth-child(1) .pipe__hd i{background:rgba(47,127,209,.3);color:#8fd0ff}
.pipe__col:nth-child(2) .pipe__hd i{background:rgba(18,168,189,.3);color:#5fd8e6}
.pipe__col:nth-child(3) .pipe__hd i{background:rgba(107,92,231,.3);color:#b3a9ff}
.pipe__col:nth-child(4) .pipe__hd i{background:rgba(30,158,106,.3);color:#5fd6a0}
.pipe__col:nth-child(5) .pipe__hd i{background:rgba(217,131,36,.3);color:#f0bc7c}
.pipe__list li{
  position:relative;padding-left:16px;font-size:12.8px;color:rgba(255,255,255,.66);
  line-height:1.68;margin-bottom:8px;
}
.pipe__list li::before{content:"";position:absolute;left:0;top:8px;width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.32)}
.pipe__col:first-child .pipe__list li::before{background:#5aa7ef}
.pipe__col:nth-child(2) .pipe__list li::before{background:#3fc4d4}
.pipe__col:nth-child(3) .pipe__list li::before{background:#9184f0}
.pipe__col:nth-child(4) .pipe__list li::before{background:#43b98a}
.pipe__col:nth-child(5) .pipe__list li::before{background:#e0a45f}

/* ───────────────── 能力矩阵 ───────────────── */
.caps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cap{
  padding:24px 22px;background:var(--card);border:1px solid var(--line);border-radius:14px;
  transition:transform .28s,box-shadow .28s,border-color .28s;
}
.cap:hover{transform:translateY(-4px);box-shadow:var(--shadow-1);border-color:rgba(47,127,209,.32)}
.cap__ico{width:40px;height:40px;border-radius:11px;background:rgba(20,80,140,.08);color:var(--brand);display:grid;place-items:center;margin-bottom:15px}
.cap h3{font-size:15.5px;font-weight:700;margin-bottom:8px}
.cap p{font-size:13.5px;color:var(--ink-2);line-height:1.76}

/* ───────────────── 知识来源 ───────────────── */
.sources{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.src{
  display:flex;align-items:center;gap:13px;padding:18px 18px;background:rgba(255,255,255,.055);
  border:1px solid rgba(255,255,255,.11);border-radius:13px;color:#fff;transition:background .25s,transform .25s;
}
.src:hover{background:rgba(255,255,255,.1);transform:translateY(-3px)}
.src__ico{width:38px;height:38px;border-radius:10px;background:rgba(90,167,239,.18);color:#8fd0ff;display:grid;place-items:center;flex:none}
.src b{font-size:14.5px;font-weight:600;display:block;line-height:1.4}
.src small{font-size:11.5px;color:rgba(255,255,255,.5)}

/* ───────────────── 场景 ───────────────── */
.scenes{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.scene{
  display:grid;grid-template-columns:44px 1fr;gap:16px;padding:26px 24px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);
  transition:transform .28s,box-shadow .28s;
}
.scene:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.scene__no{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  font-family:var(--mono);font-size:14px;font-weight:800;color:#fff;letter-spacing:.5px;
}
.scene:nth-child(1) .scene__no{background:linear-gradient(135deg,#2f7fd1,#5aa7ef)}
.scene:nth-child(2) .scene__no{background:linear-gradient(135deg,#12a8bd,#4fc9d6)}
.scene:nth-child(3) .scene__no{background:linear-gradient(135deg,#6b5ce7,#9b8cf5)}
.scene:nth-child(4) .scene__no{background:linear-gradient(135deg,#1e9e6a,#43c08c)}
.scene:nth-child(5) .scene__no{background:linear-gradient(135deg,#d98324,#efab5c)}
.scene:nth-child(6) .scene__no{background:linear-gradient(135deg,#14508c,#3a7cc0)}
.scene h3{font-size:17px;font-weight:700;margin-bottom:7px}
.scene p{font-size:14px;color:var(--ink-2);line-height:1.78}
.scene__meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.mtag{font-size:11.5px;padding:3px 9px;border-radius:6px;background:var(--bg-2);color:var(--ink-2);border:1px solid var(--line-2)}

/* ───────────────── 演示交互 ───────────────── */
.demo{
  display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:26px;
  background:var(--card);border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--shadow-1);
}
.demo__side h3{font-size:17px;font-weight:700;margin-bottom:6px}
.demo__side p{font-size:13.5px;color:var(--ink-2);margin-bottom:18px}
.qlist{display:grid;gap:9px}
.qbtn{
  text-align:left;padding:13px 15px;border-radius:11px;background:var(--bg);border:1px solid var(--line);
  cursor:pointer;font-size:13.8px;color:var(--ink-2);line-height:1.55;transition:all .22s;
}
.qbtn:hover{border-color:var(--brand-2);color:var(--brand);background:rgba(47,127,209,.05)}
.qbtn.is-on{border-color:var(--brand-2);background:rgba(47,127,209,.09);color:var(--brand);font-weight:600}
.qbtn small{display:block;font-size:11.5px;color:var(--ink-4);font-weight:400;margin-top:3px}

.demo__main{display:flex;flex-direction:column;gap:16px}
.demo__q{
  padding:16px 18px;border-radius:13px;background:linear-gradient(135deg,#123252,#0e2740);
  color:#fff;font-size:16px;font-weight:600;display:flex;gap:11px;align-items:flex-start;line-height:1.6;
}
.demo__q svg{width:18px;height:18px;stroke:#7fd4ff;fill:none;stroke-width:2;flex:none;margin-top:3px}
.demo__stages{display:grid;gap:9px}
.dstage{
  display:grid;grid-template-columns:30px 1fr;gap:12px;align-items:start;
  padding:13px 15px;border-radius:11px;background:var(--bg);border:1px solid var(--line-2);
  opacity:0;transform:translateY(8px);transition:opacity .4s ease,transform .4s ease;
}
.dstage.is-on{opacity:1;transform:none}
.dstage__n{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:11.5px;font-family:var(--mono);font-weight:800;color:#fff;background:var(--brand);
}
.dstage:nth-child(1) .dstage__n{background:#2f7fd1}
.dstage:nth-child(2) .dstage__n{background:#12a8bd}
.dstage:nth-child(3) .dstage__n{background:#6b5ce7}
.dstage:nth-child(4) .dstage__n{background:#1e9e6a}
.dstage b{font-size:14px;font-weight:700;display:block;line-height:1.5}
.dstage p{font-size:13px;color:var(--ink-2);line-height:1.72;margin-top:3px}
.dstage code{font-family:var(--mono);font-size:12px;background:rgba(12,20,32,.06);padding:1px 6px;border-radius:4px;color:var(--brand)}
.dstage__out{margin-top:8px;display:grid;gap:6px}
.chunk{
  display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start;
  padding:9px 12px;border-radius:8px;background:#fff;border:1px solid var(--line-2);font-size:12.8px;line-height:1.6;
}
.chunk__id{font-family:var(--mono);font-size:11px;font-weight:700;color:var(--brand-2);white-space:nowrap}
.chunk__id.is-top{color:var(--green)}
.chunk__txt{color:var(--ink-2)}
.chunk__txt b{color:var(--ink)}
.demo__ans{
  padding:18px 20px;border-radius:13px;background:linear-gradient(135deg,rgba(18,168,189,.09),rgba(47,127,209,.06));
  border:1px solid rgba(18,168,189,.28);
}
.demo__ans b{display:flex;align-items:center;gap:8px;font-size:12.5px;color:#0d7f92;letter-spacing:.5px;margin-bottom:9px;font-weight:700}
.demo__ans p{font-size:14.5px;line-height:1.82;color:var(--ink)}
.demo__ans .cites{margin-top:13px}
.demo__ans .cite{background:rgba(12,20,32,.055);color:var(--ink-2)}
.demo__ans .cite b{color:var(--brand)}
.demo__note{margin-top:16px;font-size:12.5px;color:var(--ink-3);text-align:center}

/* ───────────────── 对比 ───────────────── */
.vs{display:grid;grid-template-columns:1fr auto 1fr;gap:0;align-items:stretch}
.vs__col{padding:30px 28px;border-radius:var(--radius)}
.vs__old{background:var(--bg-2);border:1px solid var(--line-2)}
.vs__new{background:#fff;border:1px solid rgba(47,127,209,.28);box-shadow:var(--shadow-1)}
.vs__hd{font-size:16px;font-weight:700;margin-bottom:18px;display:flex;align-items:center;gap:9px}
.vs__old .vs__hd{color:var(--ink-3)}
.vs__new .vs__hd{color:var(--brand)}
.vs li{position:relative;padding-left:24px;font-size:14px;line-height:1.72;margin-bottom:11px;color:var(--ink-2)}
.vs__old li::before{content:"✕";position:absolute;left:0;top:0;color:#c2cad6;font-size:13px;font-weight:700}
.vs__new li::before{content:"✓";position:absolute;left:0;top:0;color:var(--green);font-size:14px;font-weight:800}
.vs__mid{display:flex;align-items:center;padding:0 16px;color:var(--ink-4);font-size:13px;font-weight:700;letter-spacing:1px;writing-mode:vertical-rl}

/* ───────────────── 部署安全 ───────────────── */
.dep{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.depc{padding:28px 26px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1)}
.depc__tag{display:inline-block;font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:6px;margin-bottom:14px}
.depc:nth-child(1) .depc__tag{background:rgba(47,127,209,.12);color:#2f7fd1}
.depc:nth-child(2) .depc__tag{background:rgba(107,92,231,.12);color:#6b5ce7}
.depc:nth-child(3) .depc__tag{background:rgba(30,158,106,.12);color:#1e9e6a}
.depc h3{font-size:18px;font-weight:700;margin-bottom:9px}
.depc p{font-size:14px;color:var(--ink-2);line-height:1.78}
.depc__fit{display:block;margin-top:15px;padding-top:14px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--ink-3)}

.secgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:22px}
.secitem{padding:20px 18px;border-radius:12px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1)}
.secitem b{display:flex;align-items:center;gap:8px;font-size:14px;margin-bottom:7px;color:#fff}
.secitem b svg{width:16px;height:16px;stroke:#7fd4ff;fill:none;stroke-width:2;flex:none}
.secitem p{font-size:12.8px;color:rgba(255,255,255,.58);line-height:1.7}

/* ───────────────── 流程 ───────────────── */
.flowsteps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:fs}
.fstep{position:relative;padding:24px 20px;background:var(--card);border:1px solid var(--line);border-radius:14px}
.fstep:not(:last-child)::after{
  content:"";position:absolute;right:-11px;top:38px;width:9px;height:9px;
  border-top:2px solid var(--line);border-right:2px solid var(--line);transform:rotate(45deg);
}
.fstep__n{font-family:var(--mono);font-size:12px;font-weight:800;color:var(--brand-2);margin-bottom:10px}
.fstep h3{font-size:15.5px;font-weight:700;margin-bottom:7px}
.fstep p{font-size:13.2px;color:var(--ink-2);line-height:1.72}

/* ───────────────── 指标 ───────────────── */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric{padding:30px 26px;border-radius:var(--radius);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.11);text-align:center}
.metric b{display:block;font-size:40px;font-weight:800;letter-spacing:-1.4px;line-height:1.2;
  background:linear-gradient(120deg,#7cc0ff,#4a9ae8 50%,#22c3d6);-webkit-background-clip:text;background-clip:text;color:transparent}
.metric b span{font-size:18px}
.metric small{display:block;margin-top:8px;font-size:13.5px;color:rgba(255,255,255,.62)}
.metric em{display:block;margin-top:4px;font-style:normal;font-size:11.5px;color:rgba(255,255,255,.35)}

/* ───────────────── FAQ ───────────────── */
.faq{max-width:880px;margin:0 auto;display:grid;gap:11px}
.qa{background:var(--card);border:1px solid var(--line);border-radius:13px;overflow:hidden;transition:border-color .25s,box-shadow .25s}
.qa[open]{border-color:rgba(47,127,209,.32);box-shadow:var(--shadow-1)}
.qa summary{
  list-style:none;cursor:pointer;padding:19px 52px 19px 22px;position:relative;
  font-size:15.5px;font-weight:600;transition:color .2s;
}
.qa summary::-webkit-details-marker{display:none}
.qa summary:hover{color:var(--brand)}
.qa summary::after{
  content:"";position:absolute;right:24px;top:50%;width:10px;height:10px;
  border-right:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3);
  transform:translateY(-70%) rotate(45deg);transition:transform .25s;
}
.qa[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--brand-2)}
.qa__body{padding:0 22px 20px;font-size:14.5px;color:var(--ink-2);line-height:1.86}

/* ───────────────── CTA ───────────────── */
.cta{background:linear-gradient(150deg,#0c1420 0%,#123252 55%,#0f2b46 100%);color:#fff;padding:88px 0;position:relative;overflow:hidden}
.cta::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle at 88% 22%,rgba(47,127,209,.28),transparent 45%),
                   radial-gradient(circle at 10% 85%,rgba(18,168,189,.2),transparent 42%);
}
.cta__in{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,400px);gap:52px;align-items:center}
.cta h2{font-size:clamp(26px,3.4vw,40px);font-weight:800;line-height:1.3;letter-spacing:-.5px}
.cta__note{margin-top:18px;font-size:15.5px;color:rgba(255,255,255,.72);line-height:1.85}
.ctacard{background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.13);border-radius:16px;padding:28px 26px;backdrop-filter:blur(8px)}
.ctacard h3{font-size:19px;font-weight:700;margin-bottom:14px}
.ctacard li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.78);line-height:1.7;margin-bottom:11px}
.ctacard li::before{content:"→";color:#7fd4ff;flex:none;font-weight:700}
.ctacard .btn{width:100%;justify-content:center;margin-top:8px}

/* ───────────────── 页脚 ───────────────── */
.footer{background:#0a1119;color:rgba(255,255,255,.62);padding:62px 0 0;font-size:13.5px}
.footer__in{display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));gap:40px;padding-bottom:44px}
.footer__brand p{margin-top:14px;line-height:1.8;font-size:13px;color:rgba(255,255,255,.45);max-width:340px}
.footer__corp{color:rgba(255,255,255,.78);font-weight:600}
.footer__hd{font-size:13.5px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.4px}
.footer__col li{margin-bottom:9px}
.footer__col a{color:rgba(255,255,255,.55);transition:color .2s}
.footer__col a:hover{color:#7fd4ff}
.footer__contact span{display:block;font-size:11.5px;color:rgba(255,255,255,.34);margin-bottom:2px}
.footer__contact a{font-size:14px;color:#fff}
.footer__bar{border-top:1px solid rgba(255,255,255,.08);padding:20px 0}
.footer__bar__in{display:flex;flex-wrap:wrap;gap:8px 26px;justify-content:space-between;font-size:12px;color:rgba(255,255,255,.34)}
.footer__bar a{color:rgba(255,255,255,.5)}

/* ───────────────── 动效 ───────────────── */
.rv{opacity:0;transform:translateY(22px);transition:opacity .65s cubic-bezier(.22,.85,.28,1),transform .65s cubic-bezier(.22,.85,.28,1)}
.rv.is-in{opacity:1;transform:none}
.rv-d1{transition-delay:.07s}.rv-d2{transition-delay:.14s}.rv-d3{transition-delay:.21s}.rv-d4{transition-delay:.28s}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto}
  .rv{opacity:1;transform:none}
}

/* ───────────────── 响应式 ───────────────── */
@media (max-width:1080px){
  .hero__in{grid-template-columns:1fr;gap:44px}
  .hero__stats{max-width:none}
  .caps{grid-template-columns:repeat(2,1fr)}
  .sources{grid-template-columns:repeat(2,1fr)}
  .secgrid{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .demo{grid-template-columns:1fr}
  .engines{grid-template-columns:1fr}
  .dep{grid-template-columns:1fr}
  .flowsteps{grid-template-columns:repeat(2,1fr)}
  .fstep::after{display:none}
  .footer__in{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .navtoggle{display:block}
  .nav{
    position:fixed;inset:66px 0 auto 0;margin:0;background:#0c1420;border-bottom:1px solid rgba(255,255,255,.1);
    padding:16px 22px 22px;display:none;box-shadow:0 20px 40px -20px rgba(0,0,0,.8);
  }
  .nav.is-open{display:block}
  .nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .nav__link{padding:11px 12px;font-size:15px}
  .header__tel{display:block;margin:14px 0 0;text-align:center}
  .vs{grid-template-columns:1fr}
  .vs__mid{padding:14px 0;writing-mode:horizontal-tb;justify-content:center}
  .sec{padding:70px 0}
}
@media (max-width:680px){
  .wrap{width:calc(100% - 32px)}
  .hero{padding:104px 0 66px}
  .hero__stats{grid-template-columns:repeat(2,1fr)}
  .caps,.sources,.scenes,.secgrid,.metrics,.flowsteps,.footer__in{grid-template-columns:1fr}
  .arch{padding:30px 22px}
  .pipe{flex-direction:column}
  .pipe__col{padding:14px 0}
  .pipe__col:not(:last-child)::after{right:auto;left:26px;top:auto;bottom:-9px;transform:rotate(135deg)}
  .demo{padding:20px}
  .cta__in{grid-template-columns:1fr}
}