/* ==========================================================================
   Longview Solutions — site.css
   职责：定义全站唯一的设计令牌、版式、组件与响应式规则；任何页面不得写内联样式。
   约束：零外部依赖（无 CDN、无 webfont、无图片引用），所有视觉由 CSS/SVG 完成。
   ========================================================================== */

/* ---------- 1. Tokens ---------------------------------------------------- */
:root{
  /* ink & surface */
  --ink:#0C1116;
  --ink-2:#161E27;
  --ink-3:#212B36;
  --white:#FFFFFF;
  --paper:#F7F5F1;
  --paper-2:#F1EEE8;

  /* text */
  --body:#3D4753;
  --muted:#66717E;
  --faint:#767F8B;
  --on-dark:#A9B3BE;
  --on-dark-strong:#D7DDE4;

  /* lines */
  --line:#E2E5E9;
  --line-strong:#CBD1D8;
  --line-dark:rgba(255,255,255,.12);

  /* accent */
  --amber:#F0B429;
  --amber-text:#8A5D00;
  --amber-soft:#FDF4DF;
  --amber-line:#E9D3A0;

  /* type */
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  --font-display:"Instrument Serif",Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;

  /* scale */
  --fs-display:clamp(40px,6.2vw,74px);
  --fs-h1:clamp(34px,4.6vw,58px);
  --fs-h2:clamp(27px,3.3vw,42px);
  --fs-h3:clamp(19px,1.6vw,23px);
  --fs-lead:clamp(17px,1.35vw,20px);
  --fs-body:17px;
  --fs-small:14.5px;
  --fs-micro:12px;

  /* space */
  --shell:1240px;
  --pad-x:24px;
  --sec-y:clamp(64px,8.5vw,116px);
  --gap:clamp(16px,2vw,28px);

  /* motion */
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.55s;

  --radius:2px;
}

/* ---------- 2. Reset & base --------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--white);
  color:var(--body);
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
hr{border:0;border-top:1px solid var(--line);margin:0;}

::selection{background:var(--amber);color:var(--ink);}

:focus-visible{
  outline:2px solid var(--ink);
  outline-offset:3px;
  border-radius:1px;
}
.dark :focus-visible,.site-footer :focus-visible{outline-color:var(--amber);}

/* ---------- 3. Typography ----------------------------------------------- */
.display,h1,h2,h3{color:var(--ink);}
.display{
  font-family:var(--font-display);
  font-size:var(--fs-display);
  line-height:1.02;
  letter-spacing:-.022em;
  font-weight:400;
}
h1{
  font-family:var(--font-display);
  font-size:var(--fs-h1);
  line-height:1.06;
  letter-spacing:-.018em;
  font-weight:400;
}
h2{
  font-family:var(--font-display);
  font-size:var(--fs-h2);
  line-height:1.12;
  letter-spacing:-.014em;
  font-weight:400;
}
h3{
  font-size:var(--fs-h3);
  line-height:1.3;
  letter-spacing:-.008em;
  font-weight:600;
}
h4{font-size:17px;line-height:1.4;font-weight:600;color:var(--ink);}
.lead{
  font-size:var(--fs-lead);
  line-height:1.55;
  color:var(--body);
  letter-spacing:-.005em;
}
.small{font-size:var(--fs-small);line-height:1.6;}
.muted{color:var(--muted);}
.faint{color:var(--faint);}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-micro);
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--faint);
  margin-bottom:20px;
}
.eyebrow::before{
  content:"";width:24px;height:1px;background:var(--amber);flex:0 0 auto;
}
.dark .eyebrow{color:var(--amber);}
.dark .eyebrow::before{background:var(--amber);}

/* ---------- 4. Layout --------------------------------------------------- */
.shell{
  width:100%;max-width:var(--shell);
  margin:0 auto;
  padding-left:var(--pad-x);
  padding-right:var(--pad-x);
}
.section{padding-top:var(--sec-y);padding-bottom:var(--sec-y);}
.section--tight{padding-top:clamp(44px,6vw,72px);padding-bottom:clamp(44px,6vw,72px);}
.section--paper{background:var(--paper);}
.dark{background:var(--ink);color:var(--on-dark);}
.dark h1,.dark h2,.dark h3,.dark h4,.dark .display{color:#fff;}
.dark .lead{color:var(--on-dark-strong);}

.sec-head{max-width:760px;margin-bottom:clamp(32px,4vw,56px);}
.sec-head .lead{margin-top:18px;}
.sec-head--split{
  max-width:none;display:grid;gap:24px;
  grid-template-columns:minmax(0,1fr);
  align-items:end;
}
@media(min-width:900px){
  .sec-head--split{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:48px;}
}

.grid{display:grid;gap:var(--gap);}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.g-4{grid-template-columns:repeat(4,minmax(0,1fr));}
.g-auto{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* 占位符：上线前需替换为真实邮箱/电话，视觉上刻意可辨认 */
.ph{
  border-bottom:1px dashed var(--line-strong);
  color:var(--muted);
  cursor:help;
  white-space:nowrap;
}
.dark .ph,.site-footer .ph{
  color:var(--on-dark-strong);
  border-bottom-color:rgba(255,255,255,.32);
}

/* 间距工具类：避免页面内联样式 */
.mt-16{margin-top:16px;}
.mt-24{margin-top:24px;}
.mt-28{margin-top:28px;}
.mt-40{margin-top:40px;}
.skip{
  position:absolute;left:16px;top:-64px;z-index:200;
  background:var(--ink);color:#fff;padding:12px 18px;
  font-size:14px;transition:top .2s var(--ease);
}
.skip:focus{top:12px;}

/* ---------- 5. Buttons -------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:52px;padding:0 26px;
  background:var(--ink);color:#fff;
  border:1px solid var(--ink);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border-radius:var(--radius);
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),
             border-color .22s var(--ease),transform .22s var(--ease);
}
.btn:hover{background:var(--ink-3);border-color:var(--ink-3);transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn .arrow{transition:transform .22s var(--ease);}
.btn:hover .arrow{transform:translateX(3px);}

.btn--amber{background:var(--amber);border-color:var(--amber);color:var(--ink);}
.btn--amber:hover{background:#FFC53D;border-color:#FFC53D;}

.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line-strong);}
.btn--ghost:hover{background:var(--ink);color:#fff;border-color:var(--ink);}

.dark .btn--ghost,
.hero .btn--ghost,
.page-head .btn--ghost,
.cta-band .btn--ghost{color:#fff;border-color:rgba(255,255,255,.28);}
.dark .btn--ghost:hover,
.hero .btn--ghost:hover,
.page-head .btn--ghost:hover,
.cta-band .btn--ghost:hover{background:#fff;color:var(--ink);border-color:#fff;}

.btn--sm{min-height:44px;padding:0 20px;font-size:14px;}
.btn--block{width:100%;}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--amber);padding-bottom:2px;
  position:relative;
  transition:gap .22s var(--ease),border-color .22s var(--ease);
}
/* 扩大点击热区到 ≥44px，不改变视觉（文字行高本身只有 26–28px） */
.link-arrow::after{content:"";position:absolute;left:0;right:0;top:-8px;bottom:-8px;}
.link-arrow:hover{gap:13px;border-color:var(--ink);}
.dark .link-arrow{color:#fff;}

.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px;}
.btn-row--flush{margin-top:0;}

/* ---------- 6. Header & navigation -------------------------------------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line);}
.header-inner{
  display:flex;align-items:center;gap:20px;
  min-height:72px;
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-display);
  font-size:25px;letter-spacing:-.01em;color:var(--ink);
  flex:0 0 auto;
}
.brand .dot{
  width:9px;height:9px;background:var(--amber);
  display:inline-block;border-radius:50%;
  box-shadow:0 0 0 3px rgba(240,180,41,.22);
}
.brand-sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--faint);
  display:none;
}
@media(min-width:1180px){
  .brand-sub{display:block;margin-left:4px;padding-left:14px;border-left:1px solid var(--line);}
}

.nav{margin-left:auto;}
.nav > ul{display:flex;align-items:center;gap:4px;}
.nav > ul > li{position:relative;}
.nav-link,.nav-trigger{
  display:inline-flex;align-items:center;gap:6px;
  min-height:44px;padding:0 14px;
  font-size:14.5px;font-weight:500;color:var(--body);
  background:none;border:0;cursor:pointer;
  border-radius:var(--radius);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link:hover,.nav-trigger:hover{color:var(--ink);background:var(--paper);}
.nav-link[aria-current="page"],.nav-trigger[aria-current="page"]{color:var(--ink);font-weight:600;}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;
  height:2px;background:var(--amber);
}
.nav-trigger .caret{
  width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translateY(-2px);
  transition:transform .2s var(--ease);
}
.nav-trigger[aria-expanded="true"] .caret{transform:rotate(225deg) translateY(-2px);}

.menu{
  position:absolute;top:calc(100% + 8px);left:0;
  min-width:290px;padding:10px;
  background:#fff;border:1px solid var(--line);
  box-shadow:0 18px 40px -12px rgba(12,17,22,.16);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.menu.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.menu a{
  display:block;padding:11px 12px;border-radius:var(--radius);
  transition:background .18s var(--ease);
}
.menu a:hover{background:var(--paper);}
.menu .m-title{display:block;font-size:14.5px;font-weight:600;color:var(--ink);}
.menu .m-desc{display:block;font-size:12.5px;color:var(--faint);line-height:1.5;margin-top:2px;}
.menu .m-cols{display:grid;grid-template-columns:1fr 1fr;gap:2px;min-width:440px;}

/* 980–1179 区间：页头 CTA 尚未出现，Industries 双列下拉会顶出视口 → 改为右对齐 */
@media(min-width:980px) and (max-width:1179px){
  #menu-ind{left:auto;right:0;}
}

.nav-toggle{
  display:none;
  width:44px;height:44px;margin-left:auto;
  background:none;border:1px solid var(--line-strong);border-radius:var(--radius);
  cursor:pointer;padding:0;position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;width:20px;height:1.5px;background:var(--ink);
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span:nth-child(1){top:16px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:26px;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg);}

.header-cta{display:none;}
@media(min-width:1180px){.header-cta{display:inline-flex;margin-left:8px;}}

/* mobile drawer */
.nav-cta{display:none;}
@media(max-width:979px){
  .nav-toggle{display:block;}
  /* backdrop-filter 会让 position:fixed 子元素以页头为包含块，导致抽屉高度塌陷 —— 移动端关闭 */
  .site-header{
    backdrop-filter:none;
    -webkit-backdrop-filter:none;
    background:#fff;
  }
  .nav{
    position:fixed;inset:72px 0 0 0;
    margin:0;background:#fff;
    padding:20px var(--pad-x) 48px;
    overflow-y:auto;
    transform:translateX(100%);
    transition:transform .32s var(--ease);
    border-top:1px solid var(--line);
    display:none;
  }
  .nav.is-open{display:block;transform:translateX(0);}
  .nav > ul{display:block;}
  .nav > ul > li{border-bottom:1px solid var(--line);}
  .nav-link,.nav-trigger{
    width:100%;justify-content:space-between;
    min-height:56px;padding:0;font-size:17px;font-weight:500;
  }
  .nav-link[aria-current="page"]::after{display:none;}
  .nav-link[aria-current="page"]{color:var(--ink);}
  .menu{
    position:static;min-width:0;padding:0 0 12px;
    border:0;box-shadow:none;background:none;
    opacity:1;visibility:visible;transform:none;
    display:none;
  }
  .menu.is-open{display:block;}
  .menu .m-cols{grid-template-columns:1fr;min-width:0;}
  .menu a{padding:10px 0 10px 14px;border-left:1px solid var(--line);}
  .menu .m-desc{font-size:12.5px;}

  /* 抽屉内主 CTA：手机上页头按钮被隐藏，这里是唯一入口 */
  .nav-cta{display:block;margin-top:26px;border-bottom:0;}
  .nav-cta .btn{width:100%;}
}
body.nav-locked{overflow:hidden;}

/* ---------- 7. Hero ----------------------------------------------------- */
.hero{
  position:relative;overflow:hidden;
  background:var(--ink);color:var(--on-dark);
  padding-top:clamp(64px,9vw,120px);
  padding-bottom:0;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 82% 8%, rgba(240,180,41,.16), transparent 62%),
    radial-gradient(700px 500px at 6% 92%, rgba(86,120,180,.14), transparent 66%);
  pointer-events:none;
}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:88px 88px;
  mask-image:radial-gradient(ellipse 88% 70% at 50% 32%, #000 30%, transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 88% 70% at 50% 32%, #000 30%, transparent 78%);
}
.hero-inner{position:relative;z-index:2;}
.hero h1{color:#fff;max-width:15ch;}
.hero h1 em{
  font-style:normal;color:var(--amber);
}
.hero .lead{
  margin-top:26px;max-width:56ch;color:var(--on-dark-strong);
  font-size:clamp(17px,1.5vw,21px);
}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:12px 28px;
  margin-top:34px;font-size:13.5px;color:var(--on-dark);
}
.hero-meta span{display:inline-flex;align-items:center;gap:8px;}
.hero-meta span::before{
  content:"";width:5px;height:5px;background:var(--amber);border-radius:50%;flex:0 0 auto;
}

.hero-visual{
  position:relative;margin-top:clamp(40px,6vw,72px);
  min-height:clamp(150px,20vw,210px);
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;align-items:flex-end;
}

/* 四段式交付轨道：把"从图纸到量产"直接画在首屏 */
.stage-rail{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  width:100%;
  padding-bottom:clamp(18px,2.6vw,30px);
}
@media(min-width:720px){.stage-rail{grid-template-columns:repeat(4,minmax(0,1fr));}}
.stage{
  position:relative;
  padding-top:42px;padding-right:14px;
  border-top:1px solid rgba(255,255,255,.13);
}
.stage:nth-child(1){border-top-color:rgba(240,180,41,.28);}
.stage:nth-child(2){border-top-color:rgba(240,180,41,.48);}
.stage:nth-child(3){border-top-color:rgba(240,180,41,.68);}
.stage:nth-child(4){border-top-color:rgba(240,180,41,.92);}
.stage::before{
  content:"";position:absolute;top:-3px;left:0;
  width:6px;height:6px;border-radius:50%;
  background:rgba(255,255,255,.32);
}
.stage:nth-child(3)::before,.stage:nth-child(4)::before{background:var(--amber);}
.stage:nth-child(4)::before{box-shadow:0 0 0 4px rgba(240,180,41,.16);}
.stage .s-idx{
  display:block;font-family:var(--font-mono);font-size:10.5px;
  letter-spacing:.14em;color:var(--faint);
}
.stage .s-name{
  display:block;margin-top:6px;font-size:15px;font-weight:600;color:#fff;
  letter-spacing:-.005em;
}
.stage .s-note{
  display:block;margin-top:4px;font-size:12.5px;line-height:1.45;color:var(--on-dark);
}
@media(max-width:719px){
  .stage{padding-top:30px;padding-bottom:14px;}
  .stage:nth-child(1),.stage:nth-child(2){padding-bottom:20px;}
  .stage .s-name{font-size:14px;}
  .stage .s-note{font-size:11.5px;}
}

/* stat strip that sits at the base of hero */
.hero-stats{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  border-top:1px solid rgba(255,255,255,.14);
}
@media(min-width:820px){.hero-stats{grid-template-columns:repeat(4,minmax(0,1fr));}}
.hero-stat{
  padding:26px 0 30px;
  border-right:1px solid rgba(255,255,255,.1);
}
.hero-stat:last-child{border-right:0;}
@media(max-width:819px){
  /* 右列原本 padding-left:0，文字直接压在竖线上 —— 两侧各留 18px 对称内边距 */
  .hero-stat{padding:22px 18px 24px 0;}
  .hero-stat:nth-child(2n){border-right:0;padding:22px 0 24px 18px;}
}
@media(min-width:820px){.hero-stat{padding-left:24px;}.hero-stat:first-child{padding-left:0;}}
.hero-stat .num{
  font-family:var(--font-display);
  font-size:clamp(30px,3.6vw,44px);
  line-height:1;color:#fff;letter-spacing:-.02em;
  display:block;
}
.hero-stat .num small{font-size:.55em;letter-spacing:0;margin-left:2px;color:var(--amber);}
.hero-stat .lbl{
  display:block;margin-top:10px;font-size:13px;line-height:1.45;color:var(--on-dark);
  max-width:22ch;
}

/* ---------- 8. Page header (inner pages) -------------------------------- */
.page-head{
  background:var(--ink);color:var(--on-dark);
  padding-top:clamp(52px,6.5vw,88px);
  padding-bottom:clamp(52px,6.5vw,88px);
  position:relative;overflow:hidden;
}
.page-head::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(760px 380px at 88% 0%, rgba(240,180,41,.13), transparent 64%);
  pointer-events:none;
}
.page-head .shell{position:relative;z-index:2;}
.page-head h1{color:#fff;max-width:20ch;}
.page-head .lead{margin-top:22px;max-width:62ch;color:var(--on-dark-strong);}
.breadcrumb{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--faint);margin-bottom:26px;
  display:flex;gap:10px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--on-dark);}
.breadcrumb a:hover{color:var(--amber);}
.breadcrumb span{color:rgba(255,255,255,.28);}

/* ---------- 9. Pillar cards (outcome pillars) --------------------------- */
.pillars{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);}
@media(min-width:760px){.pillars{grid-template-columns:1fr 1fr;}}
.pillar{
  background:#fff;padding:clamp(26px,3vw,40px);
  display:flex;flex-direction:column;
  transition:background .25s var(--ease);
  position:relative;
}
.pillar:hover{background:#FDFCFA;}
.pillar .idx{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  color:var(--amber-text);margin-bottom:auto;
}
.pillar h3{margin-top:22px;max-width:20ch;}
.pillar p{margin-top:14px;font-size:15.5px;color:var(--body);max-width:42ch;}
.pillar .out{
  margin-top:22px;padding-top:18px;border-top:1px solid var(--line);
  font-size:14px;color:var(--muted);display:flex;flex-direction:column;gap:8px;
}
.pillar .out b{color:var(--ink);font-weight:600;}
.pillar .link-arrow{margin-top:24px;align-self:flex-start;font-size:14px;}

/* ---------- 10. Metric band --------------------------------------------- */
.metrics{
  display:grid;gap:1px;background:rgba(255,255,255,.12);
  border-top:1px solid rgba(255,255,255,.12);
  border-bottom:1px solid rgba(255,255,255,.12);
}
@media(min-width:760px){.metrics{grid-template-columns:repeat(3,1fr);}}
.metric{background:var(--ink);padding:clamp(28px,3.4vw,44px) 0;}
@media(min-width:760px){.metric{padding-left:clamp(20px,3vw,40px);}.metric:first-child{padding-left:0;}}
.metric .num{
  font-family:var(--font-display);font-size:clamp(36px,4.6vw,58px);
  line-height:1;color:var(--amber);letter-spacing:-.02em;
}
.metric .num small{font-size:.5em;margin-left:3px;color:var(--on-dark);letter-spacing:0;}
.metric p{margin-top:14px;color:var(--on-dark);font-size:14.5px;max-width:30ch;}
.metric-note{margin-top:26px;font-size:var(--fs-small);color:var(--on-dark);max-width:70ch;}
.metric-note a{color:var(--amber);border-bottom:1px solid rgba(240,180,41,.4);}
.metric-note a:hover{border-bottom-color:var(--amber);}

/* ---------- 11. Work / insight cards ------------------------------------ */
.card{
  display:flex;flex-direction:column;
  border:1px solid var(--line);background:#fff;
  transition:border-color .25s var(--ease),transform .25s var(--ease),
             box-shadow .25s var(--ease);
}
.card:hover{
  border-color:var(--line-strong);
  transform:translateY(-2px);
  box-shadow:0 16px 34px -20px rgba(12,17,22,.28);
}
.card-media{
  position:relative;aspect-ratio:16/10;overflow:hidden;
  background:var(--ink-2);
}
.card-media img{width:100%;height:100%;object-fit:cover;display:block;}

/* 案例正文首图：位于折叠面板层级，可比正文列更宽 */
.case-figure{
  margin:0 24px 22px;border:1px solid var(--line);
  overflow:hidden;background:var(--ink-2);max-width:860px;
}
.case-figure img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;display:block;}
/* 仅用于非实拍图（渲染图 / 示意图），实拍案例不加 caption */
.case-figure figcaption{
  padding:9px 14px;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--faint);background:#fff;
}
.card-body{padding:clamp(20px,2.4vw,28px);display:flex;flex-direction:column;flex:1;}
.card-tag{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--amber-text);margin-bottom:12px;
}
.card h3{font-size:19px;line-height:1.35;letter-spacing:-.01em;}
.card .desc{margin-top:10px;font-size:14.5px;color:var(--muted);flex:1;}
.card .result{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--body);
}
.card .result b{color:var(--ink);}

/* decorative media panels (no image assets, pure CSS) */
.media-art{position:absolute;inset:0;}
.media-art::before,.media-art::after{content:"";position:absolute;inset:0;}
.media-art--a{background:linear-gradient(140deg,#16202B 0%,#0C1116 60%);}
.media-art--a::after{
  background-image:
    linear-gradient(to right,rgba(240,180,41,.22) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(240,180,41,.22) 1px,transparent 1px);
  background-size:34px 34px;
  mask-image:radial-gradient(circle at 70% 40%,#000 8%,transparent 62%);
  -webkit-mask-image:radial-gradient(circle at 70% 40%,#000 8%,transparent 62%);
}
.media-art--b{background:linear-gradient(200deg,#1E2A36 0%,#0C1116 70%);}
.media-art--b::after{
  background:repeating-linear-gradient(115deg,rgba(255,255,255,.06) 0 1px,transparent 1px 18px);
}
.media-art--c{background:linear-gradient(160deg,#2A2118 0%,#0C1116 68%);}
.media-art--c::after{
  background:radial-gradient(circle at 30% 70%,rgba(240,180,41,.35),transparent 55%);
}
.media-art--d{background:linear-gradient(180deg,#111A24 0%,#0C1116 100%);}
.media-art--d::after{
  background-image:radial-gradient(circle,rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:16px 16px;
  mask-image:radial-gradient(circle at 50% 50%,#000 10%,transparent 68%);
  -webkit-mask-image:radial-gradient(circle at 50% 50%,#000 10%,transparent 68%);
}

/* ---------- 12. Industry list ------------------------------------------- */
.ind-grid{
  display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
}
@media(min-width:600px){.ind-grid{grid-template-columns:1fr 1fr;}}
@media(min-width:980px){.ind-grid{grid-template-columns:repeat(4,1fr);}}
.ind-item{
  background:#fff;padding:24px 22px;
  display:flex;flex-direction:column;gap:8px;min-height:132px;
  transition:background .22s var(--ease);
}
.ind-item:hover{background:var(--amber-soft);}
.ind-item .k{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--faint);
}
.ind-item h3{font-size:16px;line-height:1.35;}
.ind-item p{font-size:13px;color:var(--muted);line-height:1.5;margin-top:auto;}

/* ---------- 13. Industry ledger rows ------------------------------------ */
[id]{scroll-margin-top:96px;}
.ind-row{
  display:grid;gap:14px 56px;
  padding:clamp(26px,3.6vw,44px) 0;
  border-top:1px solid var(--line);
}
@media(min-width:900px){.ind-row{grid-template-columns:290px minmax(0,1fr);}}
.ind-row:last-of-type{border-bottom:1px solid var(--line);}
.ind-row .ind-k{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--faint);display:block;margin-bottom:10px;
}
.ind-row h2{font-size:clamp(22px,2.4vw,30px);line-height:1.2;}
.ind-row .ind-body p{font-size:15.5px;line-height:1.7;max-width:64ch;}
.ind-row .ind-body p + p{margin-top:12px;}
.ind-row .ind-tags{
  display:grid;gap:8px 28px;margin-top:20px;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
}
.ind-row .ind-tags span{
  position:relative;padding-left:18px;font-size:14px;color:var(--body);line-height:1.55;
}
.ind-row .ind-tags span::before{
  content:"";position:absolute;left:0;top:.6em;width:7px;height:7px;
  border:1.5px solid var(--amber);border-radius:50%;
}
.ind-row .ind-proof{
  margin-top:20px;padding-top:16px;border-top:1px solid var(--line-soft);
  font-size:13.5px;color:var(--muted);
}
.ind-row .ind-proof a{color:var(--ink);border-bottom:1px solid var(--amber);}
.ind-row .ind-proof a:hover{border-color:var(--ink);}

/* ---------- 13b. 数据表格 ------------------------------------------------ */
.table-wrap{
  margin:26px 0 0;border:1px solid var(--line);background:#fff;
  overflow-x:auto;-webkit-overflow-scrolling:touch;
}
.table{width:100%;border-collapse:collapse;font-size:14px;min-width:620px;}
.table caption{
  caption-side:top;text-align:left;padding:14px 20px;border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--faint);
}
.table th,.table td{
  padding:13px 20px;text-align:left;vertical-align:top;
  border-bottom:1px solid var(--line-soft);line-height:1.5;
}
.table thead th{
  font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);font-weight:600;background:var(--paper);white-space:nowrap;
}
.table tbody tr:last-child td{border-bottom:0;}
.table td:first-child{color:var(--ink);font-weight:600;}
.table td.figure{font-family:var(--font-mono);white-space:nowrap;color:var(--ink);}
.table-note{margin-top:12px;font-size:13px;color:var(--muted);}

/* ---------- 13c. 引述带 ------------------------------------------------ */
.quote-block{
  padding:clamp(56px,7vw,92px) 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.quote-block blockquote{margin:0;max-width:34ch;}
.quote-block p{
  font-family:var(--font-display);font-size:clamp(26px,3.2vw,42px);
  line-height:1.2;letter-spacing:-.015em;color:var(--ink);margin:0;
}
.quote-block cite{
  display:block;margin-top:24px;font-style:normal;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--faint);
}
.quote-block .ph{font-family:var(--font-sans);font-size:15px;letter-spacing:0;text-transform:none;}

/* 待填槽：真实客户引述到位前使用，视觉上明确是“空位”而非成品 */
.quote-slot{
  border:1px dashed var(--line-strong);
  padding:26px 28px;background:#fff;max-width:720px;
}
.quote-slot-label{
  display:block;font-family:var(--font-mono);font-size:10.5px;
  letter-spacing:.14em;text-transform:uppercase;color:#B8791A;margin-bottom:12px;
}
.quote-slot p{margin:0;font-size:15px;color:var(--muted);line-height:1.6;}
.quote-slot-cite{
  display:block;margin-top:14px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--line-strong);
}

/* ---------- 13d. Process / steps ---------------------------------------- */.steps{display:grid;gap:clamp(20px,3vw,36px);}
@media(min-width:700px){.steps{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1040px){.steps{grid-template-columns:repeat(4,1fr);}}
.step{position:relative;padding-top:26px;border-top:2px solid var(--line);}
.step::before{
  content:"";position:absolute;top:-2px;left:0;width:44px;height:2px;background:var(--amber);
}
.step .n{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  color:var(--amber-text);display:block;margin-bottom:12px;
}
.step h3{font-size:18px;}
.step p{margin-top:10px;font-size:14.5px;color:var(--muted);}
.dark .step{border-top-color:rgba(255,255,255,.16);}
.dark .step .n{color:var(--amber);}
.dark .step p{color:var(--on-dark);}

/* ---------- 14. Split content blocks ------------------------------------ */
.split{display:grid;gap:clamp(28px,4vw,64px);align-items:start;}
@media(min-width:900px){.split{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);}}
.split--rev .split-media{order:-1;}
@media(min-width:900px){.split--rev{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);}}
.split--form{gap:clamp(32px,4vw,72px);}
@media(min-width:900px){.split--form{grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);}}

.prose p{margin-bottom:18px;font-size:16.5px;line-height:1.7;}
.prose p:last-child{margin-bottom:0;}
.prose h3{margin-top:32px;margin-bottom:12px;}
/* 法务页：控制阅读行长 */
.prose--narrow{max-width:74ch;}
.prose ul{margin:16px 0 20px;display:flex;flex-direction:column;gap:10px;}
.prose ul li{position:relative;padding-left:22px;font-size:15.5px;line-height:1.65;}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:8px;height:8px;border:1.5px solid var(--amber);border-radius:50%;
}

/* spec list — the "deep technical detail" container */
.spec{border-top:1px solid var(--line);}
.spec-row{
  display:grid;gap:6px 24px;padding:18px 0;
  border-bottom:1px solid var(--line);
}
@media(min-width:700px){.spec-row{grid-template-columns:210px minmax(0,1fr);}}
.spec-row dt{
  font-size:13px;font-family:var(--font-mono);letter-spacing:.06em;
  color:var(--faint);text-transform:uppercase;
}
.spec-row dd{margin:0;font-size:15.5px;line-height:1.6;color:var(--body);}
.spec-row dd b{color:var(--ink);font-weight:600;}

/* 深色区块内的 spec 列表（正文色在深底上不可读，需整体反转） */
.dark .spec{border-top-color:rgba(255,255,255,.14);}
.dark .spec-row{border-bottom-color:rgba(255,255,255,.1);}
.dark .spec-row dt{color:var(--on-dark);}
.dark .spec-row dd{color:var(--on-dark-strong);}
.dark .spec-row dd b{color:#fff;}

/* ---------- 15. Detail / disclosure ------------------------------------- */
.disclosure{
  border:1px solid var(--line);background:#fff;
  transition:border-color .22s var(--ease);
}
.disclosure + .disclosure{margin-top:-1px;}
.disclosure[open]{border-color:var(--line-strong);background:#FEFEFD;}
.disclosure summary{
  list-style:none;cursor:pointer;
  padding:22px 56px 22px 24px;position:relative;
  display:flex;flex-wrap:wrap;gap:6px 16px;align-items:baseline;
}
.disclosure summary::-webkit-details-marker{display:none;}
.disclosure summary::after{
  content:"";position:absolute;right:24px;top:50%;
  width:9px;height:9px;margin-top:-6px;
  border-right:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink);
  transform:rotate(45deg);
  transition:transform .25s var(--ease);
}
.disclosure[open] summary::after{transform:rotate(225deg);margin-top:-2px;}
.disclosure summary:hover{background:var(--paper);}
.disclosure .d-tag{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--amber-text);flex:0 0 auto;
}
.disclosure .d-title{font-size:17px;font-weight:600;color:var(--ink);line-height:1.4;flex:1 1 auto;min-width:200px;}
.disclosure .d-body{padding:0 24px 28px;max-width:78ch;}
.disclosure .d-body p{font-size:15.5px;line-height:1.7;margin-bottom:14px;}
.disclosure .d-body p:last-child{margin-bottom:0;}
.disclosure .d-body h4{margin:20px 0 8px;font-size:14px;text-transform:uppercase;letter-spacing:.08em;font-family:var(--font-mono);font-weight:600;color:var(--faint);}

.results-row{
  display:grid;gap:1px;background:var(--line);
  border:1px solid var(--line);margin:18px 0 4px;
}
@media(min-width:640px){.results-row{grid-template-columns:repeat(3,1fr);}}
.results-row div{background:#fff;padding:16px 18px;}
.results-row .v{
  font-family:var(--font-display);font-size:26px;line-height:1;color:var(--ink);
}
.results-row .k{margin-top:8px;font-size:12.5px;color:var(--muted);line-height:1.45;}

/* ---------- 16. CTA band ------------------------------------------------ */
/* 深色区直接接深色 CTA 时，加一道接缝，避免两段连成一片 */
.section.dark + .cta-band{border-top:1px solid rgba(255,255,255,.14);}

.cta-band{
  background:var(--ink);color:var(--on-dark);
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(680px 340px at 15% 110%, rgba(240,180,41,.18), transparent 62%);
  pointer-events:none;
}
.cta-inner{
  position:relative;z-index:2;
  display:grid;gap:32px;align-items:center;
  padding-top:clamp(52px,7vw,88px);padding-bottom:clamp(52px,7vw,88px);
}
@media(min-width:900px){.cta-inner{grid-template-columns:minmax(0,1fr) auto;gap:64px;}}
.cta-band h2{color:#fff;max-width:18ch;}
.cta-band p{margin-top:16px;color:var(--on-dark);max-width:48ch;font-size:16px;}

/* ---------- 17. Forms --------------------------------------------------- */
.form{display:grid;gap:20px;}
.form[hidden]{display:none;}
.form .row-2{display:grid;gap:20px;}
@media(min-width:700px){.form .row-2{grid-template-columns:1fr 1fr;gap:20px;}}
.form-alert{
  border:1px solid #E3B4B0;border-left:3px solid #B3261E;
  background:#FDF3F2;color:#7A1B15;
  padding:14px 16px;font-size:14px;line-height:1.55;margin-bottom:20px;
}
.form-alert[hidden]{display:none;}
.field{display:flex;flex-direction:column;gap:7px;}
.field label{
  font-size:13px;font-weight:600;color:var(--ink);letter-spacing:.01em;
}
.field label .req{color:var(--amber-text);margin-left:3px;}
.field .hint{font-size:12.5px;color:var(--faint);}
.input,.select,.textarea{
  width:100%;min-height:50px;padding:12px 14px;
  background:#fff;color:var(--ink);
  border:1px solid var(--line-strong);border-radius:var(--radius);
  font-size:15.5px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.textarea{min-height:132px;resize:vertical;line-height:1.6;}
.select{
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%233D4753' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
  padding-right:38px;
}
.input:focus,.select:focus,.textarea:focus{
  outline:none;border-color:var(--ink);
  box-shadow:0 0 0 3px rgba(12,17,22,.08);
}
.field.has-error .input,.field.has-error .select,.field.has-error .textarea{
  border-color:#B3261E;box-shadow:0 0 0 3px rgba(179,38,30,.09);
}
.err{
  font-size:12.5px;color:#B3261E;display:none;align-items:center;gap:6px;
}
.field.has-error .err{display:flex;}
.err::before{content:"!";font-weight:700;font-family:var(--font-mono);}

.checkline{display:flex;gap:11px;align-items:flex-start;font-size:13.5px;color:var(--muted);line-height:1.55;}
.checkline input{margin-top:3px;width:17px;height:17px;accent-color:var(--ink);flex:0 0 auto;}
.field.has-error .checkline{color:#B3261E;}

.form-note{font-size:12.5px;color:var(--faint);line-height:1.6;}

/* success panel */
.form-success{
  border:1px solid var(--line-strong);
  border-top:3px solid var(--amber);
  background:#fff;padding:clamp(28px,4vw,48px);
}
.form-success[hidden]{display:none;}
.form-success .mark{
  width:52px;height:52px;border-radius:50%;
  background:var(--amber-soft);border:1px solid var(--amber-line);
  display:flex;align-items:center;justify-content:center;margin-bottom:22px;
}
.form-success .mark svg{width:24px;height:24px;}
.form-success h3{font-size:clamp(22px,2.6vw,28px);font-family:var(--font-display);font-weight:400;line-height:1.2;}
.form-success p{margin-top:14px;font-size:15.5px;color:var(--body);max-width:56ch;}
.form-success .next{
  margin-top:26px;padding-top:22px;border-top:1px solid var(--line);
  display:grid;gap:12px;
}
.form-success .next div{display:flex;gap:12px;font-size:14px;color:var(--body);}
.form-success .next b{
  font-family:var(--font-mono);font-size:11.5px;color:var(--amber-text);
  letter-spacing:.1em;flex:0 0 auto;padding-top:2px;
}

/* ---------- 18. Contact aside ------------------------------------------- */
.aside-card{
  border:1px solid var(--line);background:var(--paper);
  padding:clamp(24px,3vw,32px);
}
.aside-card + .aside-card{margin-top:20px;}
.aside-card h3{font-size:16px;margin-bottom:14px;}
.aside-list{display:flex;flex-direction:column;gap:16px;}
.aside-list li{display:flex;gap:12px;font-size:14.5px;line-height:1.55;color:var(--body);}
.aside-list .n{
  font-family:var(--font-mono);font-size:11.5px;color:var(--amber-text);
  letter-spacing:.1em;flex:0 0 auto;padding-top:2px;
}
.aside-list b{color:var(--ink);font-weight:600;display:block;}

/* ---------- 19. Footer -------------------------------------------------- */
.site-footer{background:var(--ink);color:var(--on-dark);padding-top:clamp(52px,7vw,80px);}
.footer-top{
  display:grid;gap:40px;
  padding-bottom:clamp(40px,5vw,56px);
}
@media(min-width:760px){.footer-top{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}}
.footer-brand .brand{color:#fff;font-size:26px;}
.footer-brand p{
  margin-top:18px;font-size:14px;line-height:1.65;color:var(--on-dark);max-width:34ch;
}
.footer-col h2{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;line-height:1.4;
  text-transform:uppercase;color:var(--faint);font-weight:600;margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:var(--on-dark-strong);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--amber);}
@media(max-width:979px){
  .footer-col ul{gap:2px;}
  .footer-col a{display:inline-block;padding:8px 0;}
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding-top:24px;padding-bottom:32px;
  display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;
  font-size:12.5px;color:var(--faint);
}
.footer-bottom a:hover{color:var(--on-dark-strong);}

/* ---------- 20. Reveal animation ---------------------------------------- */
/* 仅在 <html class="js"> 时隐藏，保证无 JS 环境下内容完整可读 */
.reveal{opacity:1;transform:none;}
.js .reveal{
  opacity:0;transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  transition-delay:var(--d,0ms);
}
.js .reveal.is-in{opacity:1;transform:none;}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;}
  .js .reveal{opacity:1;transform:none;}
}

/* ---------- 21. Responsive guards --------------------------------------- */
@media(max-width:899px){
  .g-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .g-3{grid-template-columns:1fr;}
  .g-2{grid-template-columns:1fr;}
}
@media(max-width:560px){
  :root{--pad-x:18px;--fs-body:16.5px;}
  .g-4{grid-template-columns:1fr;}
  .btn{width:100%;}
  .btn-row .btn{width:100%;}
  .hero h1{max-width:none;}
  .header-cta{display:none;}
}
@media(min-width:561px){
  .btn-row .btn{width:auto;}
}