/* ==========================================================================
   IS-EXCEL 落地页样式
   - 蓝色为品牌主色，红橙渐变作强调，绿色仅用于 Excel 语义
   - 所有颜色集中在 :root，便于换肤
   ========================================================================== */

:root{
  --ink:#0A1220;
  --ink-2:#1B2740;
  --body:#43516B;
  --muted:#6B7A93;
  --line:#E6EBF3;
  --line-2:#EEF2F8;
  --bg:#FFFFFF;
  --soft:#F6F8FC;

  --blue:#2563EB;
  --blue-d:#1D4ED8;
  --blue-l:#EFF4FE;
  --cyan:#0EA5E9;
  --red:#FF4D6D;
  --green:#0F9D6E;

  --grad:linear-gradient(120deg,#FF3D6E 0%,#FF7A45 100%);

  --r-lg:22px;
  --r-xl:28px;

  --shadow-sm:0 1px 2px rgba(12,26,52,.05),0 4px 14px -6px rgba(12,26,52,.10);
  --shadow:0 2px 6px rgba(12,26,52,.05),0 18px 40px -18px rgba(12,26,52,.20);
  --shadow-lg:0 30px 70px -30px rgba(15,35,80,.32);

  --nav-h:70px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular","Cascadia Mono",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 14px);-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:var(--font);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4{color:var(--ink);margin:0;line-height:1.2;letter-spacing:-.02em;font-weight:700}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit}
::selection{background:rgba(37,99,235,.16)}

.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.ico{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.ico--lg{width:26px;height:26px;stroke-width:1.55}
.ico--ok{color:var(--green)}
.ico--blue{color:var(--blue)}

/* 标题里的荧光标记（#solution 用） */
.hl{position:relative;white-space:nowrap;
  background-image:linear-gradient(90deg,rgba(255,61,110,.20),rgba(255,122,69,.20));
  background-repeat:no-repeat;background-size:100% .32em;background-position:0 78%}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 18px;border-radius:11px;
  font-size:14.5px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  border:1px solid transparent;
}
.btn:active{transform:translateY(1px)}
.btn--primary{color:#fff;background:linear-gradient(135deg,#2563EB,#1D4ED8);box-shadow:0 8px 20px -10px rgba(37,99,235,.85)}
.btn--primary:hover{box-shadow:0 14px 30px -12px rgba(37,99,235,.9);transform:translateY(-1px)}
.btn--outline{color:var(--ink);background:#fff;border-color:#DCE3EF;box-shadow:var(--shadow-sm)}
.btn--outline:hover{border-color:#B9C7DE;transform:translateY(-1px);box-shadow:0 12px 24px -16px rgba(12,26,52,.5)}
.btn--lg{height:50px;padding:0 24px;font-size:15.5px;border-radius:13px}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:80;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(255,255,255,.62);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .3s ease,background .3s ease,box-shadow .3s ease;
}
.nav.is-stuck{background:rgba(255,255,255,.92);border-bottom-color:var(--line);box-shadow:0 8px 30px -24px rgba(12,26,52,.6)}
.nav__inner{display:flex;align-items:center;gap:28px;width:100%}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand__mark{width:34px;height:34px;border-radius:9px;box-shadow:0 6px 14px -8px rgba(37,99,235,.9)}
.brand__text{display:flex;flex-direction:column;font-size:16.5px;font-weight:800;letter-spacing:.03em;color:var(--ink);line-height:1.15}
.brand__text em{font-style:normal;font-size:10.5px;font-weight:500;letter-spacing:.04em;color:var(--muted)}
.nav__menu{display:flex;align-items:center;gap:24px;margin-left:auto;flex:1;justify-content:flex-end}
.nav__links{display:flex;align-items:center;gap:2px}
.nav__links a{
  position:relative;padding:8px 12px;border-radius:9px;
  font-size:14.5px;color:var(--ink-2);font-weight:500;transition:color .18s,background .18s;
}
.nav__links a:hover{color:var(--blue-d);background:#F2F6FD}
.nav__links a.is-current{color:var(--blue-d)}
.nav__links a.is-current::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
}
.nav__actions{display:flex;align-items:center;gap:8px;flex:none}
.nav__burger{display:none;width:42px;height:42px;border-radius:10px;margin-left:auto;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.nav__burger span{display:block;width:18px;height:1.8px;background:var(--ink);border-radius:2px;transition:.25s}
.nav.is-open .nav__burger span:nth-child(1){transform:translateY(6.8px) rotate(45deg)}
.nav.is-open .nav__burger span:nth-child(2){opacity:0}
.nav.is-open .nav__burger span:nth-child(3){transform:translateY(-6.8px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:calc(var(--nav-h) + 66px) 0 0;overflow:hidden}
.hero__bg{position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(820px 480px at 82% -6%,rgba(37,99,235,.16),transparent 62%),
    radial-gradient(600px 420px at 2% 2%,rgba(255,77,109,.10),transparent 62%),
    linear-gradient(180deg,#FAFCFF 0%,#FFFFFF 58%);
}
.hero__bg::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(37,99,235,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.055) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 72%);
}
.hero__inner{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;
  font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--blue-d)}
.eyebrow__dot{width:6px;height:6px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(255,77,109,.12)}
.hero h1{font-size:clamp(36px,4.5vw,58px);line-height:1.1;letter-spacing:-.035em}
.grad-text{background:linear-gradient(100deg,#1D4ED8 0%,#2563EB 34%,#0EA5E9 62%,#FF6B4A 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero__lead{margin-top:22px;max-width:520px;font-size:16.5px;line-height:1.85;color:var(--body)}
.hero__cta{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;margin-top:30px}
.hero__stats{display:grid;grid-template-columns:repeat(3,auto);gap:26px;margin-top:42px;padding-top:26px;border-top:1px solid var(--line)}
.hero__stats li{display:flex;flex-direction:column;gap:2px}
.hero__stats b{font-size:24px;font-weight:800;color:var(--ink);letter-spacing:-.03em;line-height:1.2}
.hero__stats b small{font-size:14px;font-weight:700}
.hero__stats span{font-size:12.5px;color:var(--muted);line-height:1.5}
.hero__strip{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-top:58px;padding:16px 0 22px;border-top:1px solid var(--line)}
.hero__strip>span{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#9AA7BD;font-weight:700}
.hero__strip ul{display:flex;flex-wrap:wrap;gap:8px 26px}
.hero__strip li{position:relative;font-size:13.5px;color:var(--body);font-weight:500}
.hero__strip li+li::before{content:"";position:absolute;left:-14px;top:50%;width:4px;height:4px;border-radius:50%;background:#CDD7E6}

/* ---------- app mock ---------- */
.hero__visual{position:relative;padding:10px 0 26px}
.mock{
  position:relative;border-radius:18px;overflow:hidden;background:#fff;
  border:1px solid #E2E9F4;box-shadow:var(--shadow-lg);
  transform:perspective(1400px) rotateY(-4deg) rotateX(1.5deg);
  transition:transform .6s cubic-bezier(.22,.61,.36,1);
}
.hero__visual:hover .mock{transform:perspective(1400px) rotateY(-1deg) rotateX(0)}
.mock__bar{display:flex;align-items:center;gap:6px;height:40px;padding:0 14px;background:#FBFCFF;border-bottom:1px solid var(--line)}
.mock__dot{width:8px;height:8px;border-radius:50%;background:#DCE3EF}
.mock__dot:nth-child(1){background:#FFB4B4}
.mock__dot:nth-child(2){background:#FFDCA8}
.mock__dot:nth-child(3){background:#B9E6C8}
.mock__title{margin-left:10px;font-size:11.5px;color:#7A88A0;font-weight:600}
.mock__badge{margin-left:auto;display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:20px;
  background:rgba(15,157,110,.10);color:#0B8A61;font-size:10.5px;font-weight:700}
.mock__badge::before{content:"";width:5px;height:5px;border-radius:50%;background:#0F9D6E;box-shadow:0 0 0 3px rgba(15,157,110,.16)}
.mock__body{display:flex;min-height:330px}
.mock__side{flex:none;width:122px;padding:12px 10px;background:#FAFBFE;border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:1px}
.mock__side span{font-size:11.5px;color:#657593;padding:6px 9px;border-radius:7px;display:flex;align-items:center;gap:6px}
.mock__side span.on{background:#E9F0FE;color:var(--blue-d);font-weight:700}
.mock__side span i{margin-left:auto;font-style:normal;font-size:9.5px;color:#fff;background:var(--red);border-radius:9px;padding:0 5px;line-height:15px}
.mock__side-label{margin:8px 0 2px;font-size:9.5px!important;letter-spacing:.12em;text-transform:uppercase;color:#A9B5C8!important;font-weight:700;padding-left:9px!important}
.mock__main{flex:1;min-width:0;display:flex;flex-direction:column;background:#fff}
.mock__formula{display:flex;align-items:center;gap:8px;height:32px;padding:0 10px;border-bottom:1px solid var(--line);background:#FDFEFF}
.mock__cellref{font-family:var(--mono);font-size:10.5px;color:#7A88A0;background:#F2F5FA;border-radius:4px;padding:1px 6px}
.mock__fx{font-family:var(--mono);font-size:10.5px;color:var(--green);font-style:italic;font-weight:700}
.mock__exp{font-family:var(--mono);font-size:11px;color:#40506B}
.mock__grid{width:100%;border-collapse:collapse;table-layout:fixed}
.mock__grid th:nth-child(1){width:5%}
.mock__grid th:nth-child(2){width:21%}
.mock__grid th:nth-child(3){width:15%}
.mock__grid th:nth-child(4){width:23%}
.mock__grid th:nth-child(5){width:9%}
.mock__grid th:nth-child(6){width:13%}
.mock__grid th:nth-child(7){width:14%}
.mock__grid th,.mock__grid td{
  border:1px solid #EDF1F8;padding:7px 5px;font-size:10.6px;line-height:1.45;text-align:left;
  color:#47566F;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.mock__grid th{background:#F7F9FD;color:#7A88A0;font-weight:600;font-size:10.2px}
.mock__grid .num{text-align:right}
.mock__grid .c-idx{width:22px;text-align:center;color:#B7C2D4;background:#FBFCFE;font-size:9.5px}
.mock__grid tr.is-active td{background:#F5F9FF}
.mock__grid td.cell-active{box-shadow:inset 0 0 0 2px var(--blue);background:#fff;font-weight:700;color:var(--ink)}
.tag{display:inline-block;padding:1px 7px;border-radius:20px;font-size:9.6px;font-weight:700;line-height:15px}
.tag--ok{background:rgba(15,157,110,.10);color:#0B8A61}
.tag--run{background:rgba(37,99,235,.10);color:#1D4ED8}
.tag--wait{background:rgba(255,138,76,.14);color:#C2551F}
.mock__tabs{display:flex;align-items:center;gap:2px;padding:0 8px;height:34px;border-top:1px solid var(--line);background:#FAFBFE;margin-top:auto}
.mock__tabs span{font-size:10.6px;color:#7A88A0;padding:0 10px;height:100%;display:flex;align-items:center;border-bottom:2px solid transparent}
.mock__tabs span.on{color:var(--blue-d);font-weight:700;border-bottom-color:var(--blue);background:#fff}
.mock__tabs .mock__plus{margin-left:auto;font-size:13px;color:#A9B5C8}

.float-card{
  position:absolute;display:flex;align-items:flex-start;gap:9px;padding:11px 14px;
  background:rgba(255,255,255,.96);border:1px solid #E7EDF7;border-radius:13px;
  box-shadow:0 18px 40px -22px rgba(12,26,52,.5);
  animation:floaty 6s ease-in-out infinite;
}
.float-card b{display:block;font-size:11.8px;color:var(--ink);line-height:1.5}
.float-card span{display:block;font-size:10.4px;color:var(--muted);line-height:1.5}
.float-card--a{left:-14px;bottom:-30px}
.float-card--b{right:-28px;top:-10px;animation-delay:-3s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ---------- sections ---------- */
.section{padding:88px 0;position:relative}
.section--soft{background:var(--soft);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.section--tight{padding:72px 0}
.section__head{max-width:760px;margin:0 auto 46px;text-align:center}
.section__head h2{font-size:clamp(27px,3.1vw,40px);line-height:1.26;letter-spacing:-.028em}
.section__lead{margin-top:18px;font-size:15.8px;line-height:1.85;color:var(--body)}

/* ---------- pain ---------- */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.pain{
  position:relative;padding:24px 24px 24px;border-radius:var(--r-lg);background:#fff;
  border:1px solid var(--line);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:0 12px;
}
.pain:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#D8E1F0}
/* 图标 / 标题 / 序号同一行 */
.pain .ico{grid-area:1/1;width:34px;height:34px;padding:7px;border-radius:10px;background:#F3F6FB;color:#8494AC;stroke-width:1.6}
.pain h3{grid-area:1/2;font-size:17.5px;margin:0}
.pain p{grid-column:1/-1;margin-top:13px;font-size:14.6px;line-height:1.8}
.pain__no{grid-area:1/3;justify-self:end;font-size:26px;line-height:1;font-weight:800;letter-spacing:-.04em;
  color:transparent;-webkit-text-stroke:1px #D5DFEE;transition:color .3s,-webkit-text-stroke-color .3s}
.pain:hover .pain__no{-webkit-text-stroke-color:#B9CBE8}

/* ---------- pillars ---------- */
.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pillar{position:relative;padding:26px 24px 24px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  transition:transform .3s,box-shadow .3s,border-color .3s;
  display:grid;grid-template-columns:auto minmax(0,1fr);grid-template-rows:auto 1fr auto;align-items:center;gap:0 10px}
.pillar::after{content:"";position:absolute;left:24px;right:24px;top:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--blue),transparent);opacity:0;transition:opacity .3s}
.pillar:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#D8E1F0}
.pillar:hover::after{opacity:1}
/* 图标与标题同行，纵向更省空间 */
.pillar .ico{color:var(--blue);width:38px;height:38px;padding:8px;border-radius:11px;
  background:var(--blue-l);stroke-width:1.6;margin:0}
.pillar h3{font-size:17.5px;margin:0}
.pillar p{grid-column:1/-1;margin-top:13px;font-size:14.2px;line-height:1.8}
.pillar__tag{grid-column:1/-1;justify-self:start;margin-top:16px;font-size:11.5px;font-weight:700;color:var(--blue-d);
  background:var(--blue-l);padding:4px 10px;border-radius:20px}

/* ---------- Excel 优势（单模块） ---------- */
.xlband{position:relative;display:grid;grid-template-columns:.86fr 1.55fr;gap:36px;align-items:center;
  padding:32px 34px;border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;
  background:linear-gradient(115deg,#FFFFFF 48%,#F7FAFF);box-shadow:0 34px 70px -52px rgba(12,26,52,.6)}
.xlband::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,#107C41,#2FA36B 55%,#2563EB)}
.xlband__intro h2{margin-top:8px;font-size:clamp(23px,2.5vw,31px);line-height:1.2;letter-spacing:-.032em}
.xlband__intro>p:last-child{margin-top:12px;font-size:13.4px;line-height:1.8;color:var(--body);max-width:30em}
.xlband__list{display:flex;flex-direction:column}
.xlband__list li{display:grid;grid-template-columns:auto 26px 1fr;align-items:center;gap:10px;
  padding:9px 0;border-bottom:1px dashed var(--line-2);transition:background .2s}
.xlband__list li:last-child{border-bottom:0}
.xlband__list li:hover{background:linear-gradient(90deg,rgba(37,99,235,.05),transparent 70%)}
.xlband__arrow{width:14px;height:14px;color:#C6D1E2;transition:color .2s,transform .2s}
.xlband__list li:hover .xlband__arrow{color:var(--blue);transform:translateX(3px)}
.xres{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap;min-width:0}
.xres b{font-size:13.8px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.xres em{font-style:normal;font-size:12.2px;color:var(--muted)}

.xchip{justify-self:stretch;display:inline-flex;align-items:center;gap:8px;
  min-width:120px;padding:6px 12px 6px 8px;background:#F5FAF7;border:1px solid #D9E9E0;border-left:3px solid #107C41;
  border-radius:5px;font-family:var(--mono);font-size:12.4px;color:#204B38;letter-spacing:-.01em;
  white-space:nowrap;box-sizing:border-box;transition:transform .2s,box-shadow .2s}
.xchip i{flex:none;width:18px;height:18px;border-radius:3px;background:#107C41;color:#fff;
  display:grid;place-items:center;font-style:normal;line-height:1}
.xchip i .ico{width:11px;height:11px;stroke-width:2.2}
.xlband__list li:hover .xchip{transform:translateX(2px);box-shadow:0 8px 16px -14px rgba(16,124,65,.9)}

/* ---------- capability ---------- */
.caps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cap{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:0 10px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px;transition:.3s}
.cap:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#D8E1F0}
/* 图标收进标题左侧的浅蓝底块，省一行高度 */
.cap .ico{color:var(--blue);width:38px;height:38px;padding:8px;
  border-radius:11px;background:var(--blue-l);stroke-width:1.6}
.cap h3{font-size:16.5px;margin:0}
.cap p{grid-column:1/-1;margin-top:11px;font-size:13.8px;line-height:1.78;color:var(--body)}

/* ---------- layers ---------- */
.layers-section{background:
  radial-gradient(900px 500px at 50% 0%,rgba(37,99,235,.07),transparent 70%),#fff;
  border-top:1px solid var(--line-2)}
.layers{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,1fr);gap:34px;align-items:center}
.layers__fig{position:relative}
.rings{width:100%;height:auto;display:block;overflow:visible}
.layers__hint{margin-top:6px;text-align:center;font-size:12px;color:#9AA7BD}
.ring-line{fill:none;stroke:#DCE4F1;stroke-width:1.2;stroke-dasharray:5 8;transition:stroke .3s,stroke-width .3s}
.ring-line--core{stroke:#C7D5EC;stroke-dasharray:none;stroke-width:1.4}
.ring-line--m{stroke:#DCE4F1}
.core__t1{fill:#fff;font-size:40px;font-weight:800;letter-spacing:.06em;text-anchor:middle;font-family:var(--font)}
.core__t2{fill:rgba(255,255,255,.72);font-size:15px;text-anchor:middle;font-family:var(--font);letter-spacing:.08em}
.layer-chips{transition:opacity .35s ease}
.layer-chips .ring-chip rect{transition:stroke .25s,fill .25s}
.layer-chips .ring-chip text{text-anchor:middle;font-family:var(--font);font-weight:600;dominant-baseline:middle}
.layer-chips--m .ring-chip rect{fill:#FFFFFF;stroke:#DFE7F4;stroke-width:1.2}
.layer-chips--m .ring-chip text{fill:#4E5E7A;font-size:15px;letter-spacing:.03em;font-weight:700}
.layer-chips--2 .ring-chip rect{fill:#fff;stroke:#BCD1F8;stroke-width:1.4}
.layer-chips--2 .ring-chip text{fill:#1D4ED8;font-size:15px}
.layer-chips--3 .ring-chip rect{fill:#fff;stroke:#FFD2C6;stroke-width:1.4}
.layer-chips--3 .ring-chip text{fill:#D2482A;font-size:15px}
.layer-chips .ring-chip{filter:drop-shadow(0 6px 12px rgba(16,32,64,.06))}
.layers[data-focus="1"] .layer-chips--m,
.layers[data-focus="2"] .layer-chips--m,
.layers[data-focus="3"] .layer-chips--m{opacity:.26}
.layers[data-focus="1"] .layer-chips--2,
.layers[data-focus="1"] .layer-chips--3,
.layers[data-focus="2"] .layer-chips--3,
.layers[data-focus="3"] .layer-chips--2{opacity:.26}
.layers[data-focus="1"] .layer-chips--m{opacity:1}
.layers[data-focus="2"] .layer-chips--2{opacity:1}
.layers[data-focus="3"] .layer-chips--3{opacity:1}
.layers[data-focus="1"] .ring-line--core{stroke:var(--blue);stroke-width:2}
.layers[data-focus="2"] .ring-line--2{stroke:var(--blue);stroke-width:2;stroke-dasharray:6 6}
.layers[data-focus="3"] .ring-line--3{stroke:#FF8A6B;stroke-width:2;stroke-dasharray:6 6}

.layers__legend{display:flex;flex-direction:column;gap:14px}
.layer-legend{display:flex;gap:16px;padding:22px 24px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);transition:.3s;cursor:default}
.layer-legend:hover,.layer-legend.is-on{border-color:#C9D9F5;box-shadow:0 22px 44px -30px rgba(16,40,90,.55);transform:translateX(2px)}
.layer-legend__no{flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;
  font-size:13px;font-weight:800;color:#fff;background:var(--ink);margin-top:2px}
.layer-legend--2 .layer-legend__no{background:#2563EB}
.layer-legend--3 .layer-legend__no{background:linear-gradient(135deg,#FF3D6E,#FF7A45)}
.layer-legend__body{min-width:0}
.layer-legend h3{font-size:16.5px;display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.layer-legend__ring{font-size:10.5px;font-weight:700;color:#7A88A0;background:#F1F4FA;border-radius:20px;padding:2px 8px;letter-spacing:.04em}
.layer-legend__red{margin-top:5px;font-size:12.6px;font-weight:700;color:#D93A5B;letter-spacing:.01em}
.layer-legend__desc{margin-top:9px;font-size:13.4px;line-height:1.72;color:var(--body)}
.layer-legend__chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.layer-legend__chips span{font-size:11.4px;font-weight:600;color:#5A6A85;background:#F5F8FD;border:1px solid #E7EEF9;
  border-radius:20px;padding:3px 10px}

/* 小屏用的三层示意图（默认隐藏，≤960px 显示） */
.layers__mini{display:none}
.lmini{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 16px;border-radius:12px;border:1px solid transparent}
.lmini b{font-size:12.6px;font-weight:700}
.lmini i{font-style:normal;font-size:11px;opacity:.7}
.lmini--core{width:74%;background:#EAF1FE;border-color:#C9DAFB;color:#1D4ED8}
.lmini--mid{width:87%;background:#F2F8FF;border-color:#D7E7FA;color:#1E5F9E}
.lmini--out{width:100%;background:#FFF4F0;border-color:#FFD9CC;color:#C2410C}

/* ---------- extend ---------- */
.extend{display:grid;grid-template-columns:1fr 1.06fr;gap:40px;align-items:stretch}
.extend__cards{display:grid;grid-template-columns:1fr 1fr;grid-auto-rows:1fr;gap:16px}
.extend__cards .cap{padding:20px;grid-template-rows:auto 1fr auto;align-content:stretch}
.extend__cards .cap .ico{width:32px;height:32px;padding:7px;border-radius:10px}
.extend__cards .cap h3{font-size:15.5px}
.extend__cards .cap p{font-size:13.2px;line-height:1.72;margin-top:9px;align-self:start}
/* 底部补充说明：填满纵向留白，同时补充具体信息 */
.cap__meta{grid-column:1/-1;align-self:end;margin-top:12px;padding-top:10px;border-top:1px solid var(--line-2);
  font-size:11.8px;line-height:1.55;color:var(--muted)}

/* 代码展示带 */
.codeshow{position:relative;height:100%;border-radius:var(--r-lg);overflow:hidden;
  background:linear-gradient(180deg,#0C1526,#090F1C);border:1px solid #162033;
  box-shadow:0 50px 90px -60px rgba(10,20,45,.95)}
.codeshow::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(560px 200px at 8% -20%,rgba(37,99,235,.30),transparent 62%),
             radial-gradient(480px 180px at 96% 130%,rgba(255,90,110,.16),transparent 62%)}
.codeshow__bar{position:relative;display:flex;align-items:center;gap:6px;height:40px;padding:0 16px;
  border-bottom:1px solid rgba(255,255,255,.07)}
.codeshow__dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.14)}
.codeshow__name{margin-left:10px;font-size:11.5px;color:rgba(255,255,255,.42);font-family:var(--mono)}
.codeshow__body{position:relative;padding:20px 22px 24px}
.codeshow pre{margin:0;font-family:var(--mono);font-size:12.2px;line-height:1.95;color:#C8D3E6;
  white-space:pre-wrap;overflow-wrap:anywhere;overflow-x:hidden;overflow-y:auto;
  scrollbar-width:none;-ms-overflow-style:none}
.codeshow pre::-webkit-scrollbar{width:0;height:0;display:none}
.codeshow code{font-family:inherit}
.c-c{color:#5E7391}
.c-k{color:#FF8AB0}
.c-f{color:#7EB6FF}
.c-s{color:#8FE0B0}
.c-p{color:#C4A8FF}

/* ---------- roadmap（实施路径） ---------- */
.road{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:0 18px;margin-top:6px}
.road__step{position:relative;display:flex;flex-direction:column;align-items:center;text-align:center}
/* 节点之间的虚线连接 */
.road__step::before{content:"";position:absolute;top:26px;left:calc(50% + 34px);right:calc(-50% + 34px);
  border-top:2px dashed #CBD9F0}
.road__step:last-child::before{display:none}
.road__ico{position:relative;display:inline-flex;align-items:center;justify-content:center;
  width:54px;height:54px;border-radius:50%;background:#fff;border:1px solid #DCE6F6;color:var(--blue);
  box-shadow:0 12px 24px -16px rgba(37,99,235,.75)}
.road__ico .ico{width:22px;height:22px;stroke-width:1.7}
.road__no{position:absolute;top:-4px;right:-6px;display:flex;align-items:center;justify-content:center;
  width:24px;height:24px;border-radius:50%;background:var(--blue);color:#fff;
  font-size:10.5px;font-weight:800;letter-spacing:.02em;box-shadow:0 5px 12px -6px rgba(37,99,235,.9)}
.road__txt{flex:1;width:100%;margin-top:16px;padding:14px 13px 16px;
  background:#fff;border:1px solid var(--line);border-radius:14px}
.road h3{font-size:15px;margin:0}
.road__do{margin-top:8px;font-size:12.4px;line-height:1.6;color:var(--ink);font-weight:600}
.road__do span{display:block}
.road__do span+span{margin-top:2px;font-weight:400;color:var(--body)}
.road__sub{display:block;margin-top:8px;font-size:11.2px;line-height:1.5;color:var(--muted);
  word-break:keep-all;overflow-wrap:anywhere}
/* 第 5 步是「目的地」：实心圆 + 蓝色标题，视觉上收尾 */
.road__step--future .road__ico{
  background:linear-gradient(150deg,#3B7BFF,#1D45C9);border-color:transparent;color:#fff;
  box-shadow:0 20px 34px -16px rgba(37,99,235,.95)}
.road__step--future .road__txt{background:linear-gradient(170deg,#F4F8FF,#E8F0FF);
  border-color:#C6D8F8;box-shadow:0 22px 40px -34px rgba(37,99,235,.9)}
.road__step--future .road__no{background:#fff;color:var(--blue)}
.road__step--future h3{color:var(--blue-d)}
.road__note{margin-top:42px;text-align:center;font-size:12.8px;line-height:1.7;color:var(--muted)}
.road__note i{margin:0 10px;font-style:normal;color:#C3CFE3}

/* ---------- footer ---------- */
.foot{background:#070D18;color:rgba(255,255,255,.62);padding:0}
.foot__slim{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid rgba(255,255,255,.07);
  font-size:12.4px;color:rgba(255,255,255,.42)}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:32px;transform:translate(-50%,20px);z-index:200;
  max-width:min(92vw,460px);padding:13px 20px;border-radius:12px;background:rgba(10,18,32,.94);color:#fff;
  font-size:13.6px;line-height:1.6;box-shadow:0 24px 50px -20px rgba(0,0,0,.6);
  opacity:0;visibility:hidden;transition:.32s cubic-bezier(.22,.61,.36,1)}
.toast.is-on{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* ---------- reveal ---------- */
html.js-ready [data-reveal]{opacity:0;transform:translateY(20px);
  transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1)}
html.js-ready [data-reveal].is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1120px) and (min-width:721px){
  .mock__grid th:nth-child(3),.mock__grid td:nth-child(3){display:none}
  .mock__grid th,.mock__grid td{font-size:10.2px;padding:6px 5px}
}
@media (max-width:1120px){
  .nav__links a{padding:8px 9px;font-size:14px}
  .hero__inner{gap:36px}
  .float-card--a{left:-10px}
  .float-card--b{right:-6px}
  .pillars{grid-template-columns:repeat(2,1fr)}
  .caps{grid-template-columns:repeat(2,1fr)}
  /* 三列痛点卡变窄：缩图标与序号，保证标题单行 */
  .pain{padding:22px 20px;gap:0 10px}
  .pain .ico{width:30px;height:30px;padding:6px;border-radius:9px}
  .pain h3{font-size:16px}
  .pain__no{font-size:22px}
  .layers{gap:24px}
  .layer-legend{padding:18px}
}
@media (max-width:960px){
  .nav__menu{
    display:none;position:absolute;top:var(--nav-h);left:0;right:0;
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:10px 18px 18px;background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 30px 50px -32px rgba(12,26,52,.55);
  }
  .nav.is-open .nav__menu{display:flex;animation:menuIn .26s ease both}
  @keyframes menuIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
  .nav__links{flex-direction:column;align-items:stretch;gap:0}
  .nav__links a{padding:12px 10px;font-size:15px;border-radius:9px}
  .nav__links a.is-current::after{display:none}
  .nav__links a.is-current{background:#F2F6FD}
  .nav__actions{margin-top:10px;gap:10px}
  .nav__actions .btn{flex:1}
  .nav__burger{display:flex}

  .hero{padding-top:calc(var(--nav-h) + 40px)}
  .hero__inner{grid-template-columns:1fr;gap:44px}
  .hero__lead{max-width:none}
  .mock{transform:none}
  .float-card--a{left:0;bottom:-14px}
  .float-card--b{right:0;top:-14px}
  .hero__stats{grid-template-columns:repeat(2,1fr);gap:18px 20px}
  .hero__strip{margin-top:44px}

  .section{padding:64px 0}
  .section__head{margin-bottom:40px}
  .pain-grid{grid-template-columns:1fr}
  .caps{grid-template-columns:repeat(2,1fr)}
  .pillars{grid-template-columns:repeat(2,1fr)}
  .layers{grid-template-columns:1fr}
  .rings{display:none}
  .layers__fig{display:none}
  .layers__hint{display:none}
  .layers__mini{display:flex;flex-direction:column;align-items:center;gap:8px;margin:0 auto 22px;width:100%}
  .extend{grid-template-columns:1fr;gap:34px}
  .extend__cards{grid-template-columns:1fr;grid-auto-rows:auto}
  /* 实施路径改为竖向时间线（文案变多，平板也竖排） */
  .road{grid-template-columns:1fr;gap:20px;margin-top:0}
  .road__step{display:grid;grid-template-columns:54px minmax(0,1fr);column-gap:16px;align-items:center;
    text-align:left}
  .road__ico{grid-column:1;grid-row:1}
  .road__txt,.road__step--future .road__txt{grid-column:2;grid-row:1;margin-top:0;padding:0;
    background:none;border:0;border-radius:0;box-shadow:none}
  .road h3{margin:0}
  .road__do{margin-top:5px;min-height:0}
  .road__sub{margin-top:4px}
  .road__step::before{top:58px;bottom:-20px;left:26px;right:auto;width:0;height:auto;
    border-top:0;border-left:2px dashed #CBD9F0}
  .road__note{margin-top:30px;font-size:12.4px}
  .road__note i{margin:0 6px}


}
@media (max-width:720px){
  .container{padding:0 18px}
  .mock__side{display:none}
  .mock__grid th:nth-child(3),.mock__grid td:nth-child(3),
  .mock__grid th:nth-child(4),.mock__grid td:nth-child(4){display:none}
  .mock__grid th,.mock__grid td{font-size:10px;padding:6px 5px}
  .float-card{display:none}
  .hero__stats b{font-size:20px}
  .pillars{grid-template-columns:1fr}
  .caps{grid-template-columns:1fr;gap:12px}
  /* 移动端卡片收紧：图标与标题同行，正文占满整行 */
  .cap,.extend__cards .cap{grid-template-columns:28px minmax(0,1fr);
    align-items:center;gap:0 10px;padding:16px 18px}
  .cap .ico,.extend__cards .cap .ico{width:28px;height:28px;padding:5px;border-radius:8px;margin:0}
  .cap h3,.extend__cards .cap h3{font-size:15px;margin:0}
  .cap p,.extend__cards .cap p{grid-column:1/-1;margin-top:4px;font-size:13px;line-height:1.7}
  .xlband{grid-template-columns:1fr;gap:20px;padding:24px 20px}
  .xlband__list li{grid-template-columns:auto 20px 1fr;padding:10px 0}
  .xres{flex-direction:column;gap:2px;align-items:flex-start}
  .layer-legend{padding:18px 16px}
  .foot__slim{flex-direction:column;gap:6px;align-items:flex-start;font-size:12px}
  .codeshow__body{padding:14px 16px 18px}
  .codeshow pre{font-size:11.4px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  html.js-ready [data-reveal]{opacity:1;transform:none}
}