/* ==========================================================
   观境AI · 海南 | FDE 前线部署
   版式：编辑式档案 / 工程蓝图 / 阶梯 · 与参考站的居中白卡版式区分
   纯 CSS，零外部依赖
   ========================================================== */
:root{
  --paper:#F5F2EA; --paper-2:#EBE6DA; --paper-3:#FCFAF4; --white:#FFFDF8;
  --ink:#1E2A28; --ink-2:#3A4A46; --muted:#6C7B75;
  --line:rgba(30,42,40,.16); --line-soft:rgba(30,42,40,.08);
  --teal:#0E7C6B; --blue:#2C6E9B; --violet:#6F4C96; --amber:#D19A35; --coral:#DB6547;
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC","STSong",Georgia,serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --hard:6px 6px 0 rgba(30,42,40,.13); --wrap:1220px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:86px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}ul,ol{padding:0;list-style:none}
::selection{background:var(--amber);color:var(--ink)}
.wrap{width:min(var(--wrap),calc(100% - 64px));margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:0;z-index:999;background:var(--ink);color:var(--paper);padding:12px 18px}
.skip-link:focus{left:12px;top:12px}
:focus-visible{outline:3px solid var(--coral);outline-offset:3px}
.kicker{font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--teal);font-weight:700;margin-bottom:16px}
.kicker::before{content:"";display:inline-block;width:20px;height:2px;background:currentColor;vertical-align:middle;margin-right:10px}
.kicker--light{color:#9FD3C3}
.eyebrow{font-size:11.5px;letter-spacing:.2em;color:var(--muted);font-weight:700}
.eyebrow__line{display:inline-block;width:34px;height:1px;background:var(--coral);vertical-align:middle;margin-right:12px}
.hl{color:var(--teal);position:relative;white-space:nowrap}
.hl::after{content:"";position:absolute;left:0;right:0;bottom:.08em;height:.2em;background:rgba(209,154,53,.3);z-index:-1}
.period{color:var(--coral)}em{font-style:normal;color:var(--coral)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 24px;border:1.5px solid var(--ink);border-radius:2px;font-size:14px;font-weight:700;transition:transform .2s,box-shadow .2s,background .2s;white-space:nowrap}
.btn span{transition:transform .2s}.btn:hover span{transform:translateX(4px)}
.btn--dark{background:var(--ink);color:var(--paper-3);box-shadow:4px 4px 0 var(--amber)}
.btn--dark:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 var(--amber)}
.btn--ghost{background:transparent;border-color:var(--line)}
.btn--ghost:hover{border-color:var(--ink);background:rgba(255,255,255,.6)}
.btn--coral{background:var(--coral);color:#fff;border-color:var(--coral);box-shadow:4px 4px 0 var(--ink)}
.btn--coral:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 var(--ink)}
.btn--lg{padding:16px 30px;font-size:15px}.btn--block{width:100%}

/* ---------- 顶栏 / 导航 ---------- */
.topbar{background:var(--ink);color:#CBD9D2;font-size:11.5px;letter-spacing:.06em}
.topbar__inner{display:flex;justify-content:space-between;align-items:center;min-height:34px;gap:20px}
.topbar__inner>span:last-child{opacity:.7}
.dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--coral);margin-right:9px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(245,242,234,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
.site-header.is-stuck{box-shadow:0 6px 24px rgba(30,42,40,.1)}
.header__inner{display:flex;align-items:center;gap:24px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand__mark{width:36px;height:36px;flex:none}
.brand__text{font:700 21px/1 var(--serif);letter-spacing:.02em}
.brand__text strong{color:var(--teal)}
.brand__text em{font:700 10px/1 var(--sans);letter-spacing:.12em;margin-left:7px;padding:3px 6px;color:var(--paper-3);background:var(--coral);vertical-align:3px}
.nav{display:flex;gap:22px;margin-left:auto;align-items:center}
.nav a{font-size:13.5px;font-weight:600;color:var(--ink-2);padding:6px 0;position:relative;white-space:nowrap}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--coral);transition:width .25s}
.nav a:hover::after,.nav a.is-current::after{width:100%}
.nav a.is-current{color:var(--teal)}
.header__cta{flex:none;padding:10px 18px;font-size:13px}
.menu-toggle{display:none;width:42px;height:42px;border:1.5px solid var(--line);background:transparent;border-radius:2px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-toggle span{width:19px;height:2px;background:var(--ink);transition:transform .25s,opacity .25s}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 首屏 ---------- */
.hero{position:relative;padding:76px 0 96px;overflow:hidden;background:radial-gradient(800px 480px at 85% 8%,rgba(44,110,155,.09),transparent 65%),linear-gradient(180deg,#F9F6EE,var(--paper))}
.hero__blueprint{position:absolute;inset:0;opacity:.5;background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);background-size:56px 56px;mask-image:linear-gradient(180deg,#000,transparent 95%)}
.hero__inner{position:relative;display:grid;grid-template-columns:1.12fr .88fr;gap:70px;align-items:center}
.hero h1{font:700 clamp(40px,5.2vw,72px)/1.26 var(--serif);letter-spacing:-.035em;margin:24px 0 24px}
.hero__lead{font-size:15.5px;line-height:2;color:var(--ink-2);max-width:35em}
.hero__lead strong{color:var(--teal);background:rgba(14,124,107,.09);padding:0 4px}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin:32px 0 42px}
.hero__stats{display:flex;border-top:1px solid var(--line);padding-top:22px;max-width:600px}
.hero__stats>div{flex:1;padding-right:14px;margin-right:14px;border-right:1px solid var(--line)}
.hero__stats>div:last-child{border:0;margin:0}
.hero__stats dt{font:700 30px/1.1 var(--serif);color:var(--teal)}
.hero__stats dt span{font:400 13px var(--sans);color:var(--ink);margin-left:2px}
.hero__stats dd{font-size:11.5px;color:var(--muted);margin-top:6px}

/* 档案卡 */
.dossier{position:relative;background:var(--white);border:1px solid var(--line);box-shadow:12px 14px 0 rgba(30,42,40,.11);padding:28px 28px 22px;transform:rotate(1deg);transition:transform .3s}
.dossier:hover{transform:rotate(0)}
.dossier::before{content:"";position:absolute;inset:7px;border:1px dashed var(--line);pointer-events:none}
.dossier__pin{position:absolute;top:-11px;left:50%;width:64px;height:22px;transform:translateX(-50%) rotate(-3deg);background:rgba(209,154,53,.42);border:1px solid rgba(30,42,40,.12)}
.dossier__head{display:flex;justify-content:space-between;align-items:center;padding-bottom:14px;border-bottom:2px solid var(--ink)}
.dossier__no{font-size:10.5px;letter-spacing:.2em;color:var(--muted);font-weight:700}
.dossier__stamp{font:700 12px var(--serif);letter-spacing:.16em;color:var(--coral);border:2px solid var(--coral);padding:4px 9px;transform:rotate(6deg)}
.dossier__title{font:700 27px/1.25 var(--serif);letter-spacing:.04em;margin:20px 0 4px}
.dossier__sub{font-size:12px;color:var(--muted);letter-spacing:.08em;margin-bottom:18px}
.dossier__list li{display:flex;gap:11px;padding:8px 0;border-top:1px dashed var(--line);align-items:flex-start}
.check{flex:none;width:17px;height:17px;display:grid;place-items:center;background:var(--teal);color:#fff;font-size:11px;margin-top:3px}
.dossier__list b{display:block;font-size:13.5px;font-weight:700;line-height:1.5}
.dossier__list small{display:block;font-size:11.5px;color:var(--muted)}
.dossier__foot{display:flex;justify-content:space-between;align-items:center;margin-top:16px;padding-top:12px;border-top:2px solid var(--ink);font-size:11px;letter-spacing:.16em;color:var(--muted)}
.dossier__foot strong{font:700 16px var(--serif);color:var(--teal);letter-spacing:0}

/* 主张条 */
.claimbar{background:var(--ink);color:var(--paper-3)}
.claimbar__inner{display:flex;align-items:center;gap:28px;padding:22px 0}
.claimbar__mark{flex:none;font:700 26px/1 var(--serif);letter-spacing:.1em;color:#F0C978;border:1.5px solid #F0C978;padding:9px 12px}
.claimbar p{font-size:13.5px;line-height:1.85;color:#C7D5CE;flex:1}
.claimbar strong{color:var(--paper-3)}
.claimbar__tags{display:flex;gap:8px;flex:none;flex-wrap:wrap}
.claimbar__tags span{font-size:11px;border:1px solid rgba(255,255,255,.22);padding:5px 9px;color:#DCE7E1;letter-spacing:.06em}

/* ---------- 区块通用 ---------- */
.section{padding:96px 0}
.sec-head{display:grid;grid-template-columns:56px minmax(0,1.35fr) minmax(0,.95fr);gap:30px;align-items:end;border-bottom:1px solid var(--line);padding-bottom:30px;margin-bottom:52px}
.sec-head__rail{font:700 46px/1 var(--serif);color:transparent;-webkit-text-stroke:1.4px rgba(30,42,40,.28);align-self:start;padding-top:6px}
.sec-head h2{font:700 clamp(28px,3.7vw,48px)/1.36 var(--serif);letter-spacing:-.025em}
.sec-head__note{font-size:14px;line-height:1.95;color:var(--ink-2);padding-bottom:4px}
.sec-head--light{border-bottom-color:rgba(255,255,255,.2)}
.sec-head--light .sec-head__rail{-webkit-text-stroke-color:rgba(255,255,255,.4)}
.sec-head--light h2{color:var(--paper-3)}
.sec-head--light .sec-head__note{color:#B9CCC3}
.sec-head--light em{color:#F0C978}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 对照 ---------- */
.versus{background:var(--paper)}
.versus__grid{display:grid;grid-template-columns:1fr 66px 1.12fr;gap:0;align-items:stretch}
.versus__col{padding:32px 30px;border:1px solid var(--line)}
.versus__col--old{background:var(--paper-2);opacity:.9}
.versus__col--new{background:var(--white);border:1.5px solid var(--teal);box-shadow:var(--hard)}
.versus__label{font-size:11px;letter-spacing:.2em;color:var(--muted);font-weight:700;margin-bottom:12px}
.versus__col--new .versus__label{color:var(--teal)}
.versus__col h3{font:700 21px/1.5 var(--serif);margin-bottom:20px}
.versus__col ul li{position:relative;padding:9px 0 9px 22px;border-top:1px dashed var(--line);font-size:13.5px;color:var(--ink-2);line-height:1.7}
.versus__col--old ul li::before{content:"×";position:absolute;left:0;color:var(--muted)}
.versus__col--new ul li::before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:700}
.versus__vs{display:grid;place-items:center;font:700 15px var(--serif);color:var(--coral);letter-spacing:.1em}
.versus__badge{display:inline-block;margin-top:20px;background:rgba(14,124,107,.1);color:var(--teal);font-size:12px;font-weight:700;padding:8px 12px}

/* ---------- 业务线 ---------- */
.business{background:linear-gradient(180deg,var(--paper-3),#F0EBE0)}
.business__grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:26px;align-items:start}
.bline{border:1px solid var(--line);padding:32px 30px;background:var(--white)}
.bline--main{background:var(--ink);color:var(--paper-3);border-color:var(--ink);box-shadow:10px 10px 0 rgba(209,154,53,.35)}
.bline__idx{font-size:11px;letter-spacing:.2em;color:var(--coral);font-weight:700}
.bline__idx b{background:var(--coral);color:#fff;padding:2px 7px;margin-left:8px;font-size:10px;letter-spacing:.08em}
.bline h3{font:700 27px var(--serif);margin:14px 0 6px}
.bline--main h3{color:var(--paper-3)}
.bline__sub{font-size:12.5px;color:var(--muted);letter-spacing:.06em;margin-bottom:18px}
.bline--main .bline__sub{color:#A9C0B6}
.bline__desc{font-size:14px;line-height:1.95;color:var(--ink-2);padding-bottom:22px;border-bottom:1px solid var(--line)}
.bline--main .bline__desc{color:#C7D6CF;border-bottom-color:rgba(255,255,255,.16)}
.bline--main .bline__desc strong{color:#F0C978}
.bline__block{padding-top:22px}
.bline__block h4{font-size:11.5px;letter-spacing:.18em;color:var(--teal);margin-bottom:14px;font-weight:700}
.bline--main .bline__block h4{color:#9FD3C3}
.num-list li{display:flex;gap:12px;padding:8px 0;border-top:1px dashed var(--line);font-size:13.5px;line-height:1.6}
.num-list li span{font:700 12px var(--serif);color:var(--coral);padding-top:2px}
.num-list--light li{border-top-color:rgba(255,255,255,.13);color:#D6E2DC}
.num-list--light li span{color:#F0C978}
.loop{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.loop span{background:var(--paper-2);padding:12px 4px;text-align:center;font:700 17px var(--serif);color:var(--teal)}
.loop i{display:block;font:400 10.5px var(--sans);font-style:normal;color:var(--muted);margin-top:4px}
.bline__foot{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.bline__foot span{font-size:11px;border:1px solid var(--line);padding:5px 9px;color:var(--muted)}
.keypoints div{padding:10px 0;border-top:1px dashed rgba(255,255,255,.16)}
.keypoints b{display:block;font-size:13.5px;color:#F0C978}
.keypoints span{font-size:12.5px;color:#A9C0B6}
.bline__cta{display:inline-flex;align-items:center;gap:10px;margin-top:26px;padding:12px 18px;background:var(--teal);color:#fff;font-size:13.5px;font-weight:700;transition:gap .2s}
.bline__cta:hover{gap:18px}

/* ---------- FDE 阶梯 ---------- */
.fde{background:var(--ink);color:var(--paper-3);position:relative;overflow:hidden}
.fde__grid-bg{position:absolute;inset:0;opacity:.35;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:60px 60px}
.fde .wrap{position:relative}
.stairs{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;align-items:end}
.stair{background:var(--paper-3);color:var(--ink);border:1px solid rgba(255,255,255,.14);padding:24px 22px 20px;position:relative;min-height:350px;display:flex;flex-direction:column;box-shadow:0 10px 26px rgba(0,0,0,.2)}
.stair--1{margin-top:72px}.stair--2{margin-top:48px}.stair--3{margin-top:24px}.stair--4{margin-top:0}
.stair::before{content:"";position:absolute;left:0;top:0;width:100%;height:4px;background:var(--blue)}
.stair--2::before{background:var(--teal)}.stair--3::before{background:var(--violet)}.stair--4::before{background:var(--amber)}
.stair::after{content:"";position:absolute;left:-14px;bottom:0;width:14px;height:1px;background:rgba(255,255,255,.3)}
.stair__top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.stair__lv{font-size:10.5px;letter-spacing:.18em;font-weight:700;color:var(--muted)}
.stair__icon{font-size:22px;color:var(--blue);line-height:1}
.stair--2 .stair__icon{color:var(--teal)}.stair--3 .stair__icon{color:var(--violet)}.stair--4 .stair__icon{color:var(--amber)}
.stair h3{font:700 19px/1.45 var(--serif);margin-bottom:10px}
.stair__what{font-size:12.8px;line-height:1.85;color:var(--ink-2);flex:1}
.stair__meta{margin:16px 0 14px;border-top:1px dashed var(--line)}
.stair__meta div{display:flex;gap:10px;padding:5px 0;font-size:11.5px}
.stair__meta dt{flex:none;width:52px;color:var(--muted)}
.stair__meta dd{color:var(--ink-2)}
.stair__out{font-size:11.5px;line-height:1.6;color:var(--ink);background:var(--paper-2);padding:9px 10px;margin-top:auto}
.stair__out span{display:block;font-size:10px;letter-spacing:.16em;color:var(--teal);font-weight:700;margin-bottom:3px}
.agent-add{display:flex;align-items:center;gap:24px;margin-top:20px;background:rgba(255,255,255,.06);border:1px dashed rgba(240,201,120,.5);padding:22px 26px}
.agent-add__mark{flex:none;font-size:12px;font-weight:700;color:#F0C978;letter-spacing:.14em;border:1px solid #F0C978;padding:7px 10px}
.agent-add h3{font:700 19px var(--serif);margin-bottom:5px}
.agent-add p{font-size:13px;color:#B9CCC3;line-height:1.8;max-width:56em}
.agent-add__tag{margin-left:auto;flex:none;font-size:11px;color:#9FD3C3;white-space:nowrap}
.fde__foot{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,255,255,.16)}
.fde__foot p{font-size:12.5px;color:#B9CCC3;line-height:1.9}
.fde__foot b{color:#F0C978;margin-right:6px}

/* ---------- 驻场轨道 ---------- */
.deploy{background:var(--paper)}
.track{display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative;padding-top:34px}
.track::before{content:"";position:absolute;top:12px;left:0;right:0;height:2px;background:repeating-linear-gradient(90deg,var(--teal) 0 12px,transparent 12px 22px)}
.track li{position:relative;padding:0 14px 0 0;border-right:1px dashed var(--line)}
.track li:last-child{border:0}
.track__dot{position:absolute;top:-27px;left:0;width:11px;height:11px;border-radius:50%;background:var(--paper);border:2.5px solid var(--teal)}
.track li:nth-child(even) .track__dot{border-color:var(--coral)}
.track__n{font-size:10px;letter-spacing:.16em;color:var(--coral);font-weight:700}
.track h3{font:700 18px var(--serif);margin:8px 0 6px}
.track p{font-size:12.5px;color:var(--ink-2);line-height:1.75;min-height:4.4em}
.track__out{display:inline-block;margin-top:14px;font-size:11.5px;font-weight:700;color:var(--teal);background:var(--white);border:1px dashed var(--teal);padding:6px 9px}
.deploy__note{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
.deploy__note>div{background:var(--paper-3);border-top:3px solid var(--blue);padding:22px 22px 24px}
.deploy__note>div:nth-child(2){border-top-color:var(--violet)}
.deploy__note>div:nth-child(3){border-top-color:var(--amber)}
.deploy__note-n{font:700 30px/1 var(--serif);color:transparent;-webkit-text-stroke:1.3px rgba(30,42,40,.3)}
.deploy__note h4{font:700 18px var(--serif);margin:10px 0 8px}
.deploy__note p{font-size:13px;color:var(--ink-2);line-height:1.85}

/* ---------- 能力底座 ---------- */
.capability{background:linear-gradient(180deg,var(--paper-3),#EFEAE0)}
.contentline{background:var(--ink);color:var(--paper-3);padding:24px 28px;margin-bottom:26px}
.contentline__title{font-size:11.5px;letter-spacing:.18em;color:#9FD3C3;font-weight:700;margin-bottom:18px}
.contentline__flow{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.contentline__flow span{flex:1;min-width:120px;font:700 13px var(--serif);border:1px solid rgba(255,255,255,.2);padding:12px 10px;color:var(--paper-3)}
.contentline__flow span i{display:block;font:400 10.5px var(--sans);font-style:normal;color:#9FB5AC;margin-top:3px}
.contentline__flow b{color:#F0C978;font-size:15px}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cap{background:var(--white);border:1px solid var(--line);padding:26px 24px;position:relative;transition:transform .25s,box-shadow .25s}
.cap:hover{transform:translateY(-5px);box-shadow:0 14px 28px rgba(30,42,40,.1)}
.cap__n{font:700 34px/1 var(--serif);color:transparent;-webkit-text-stroke:1.3px rgba(30,42,40,.3);display:block;margin-bottom:14px}
.cap h3{font:700 19px var(--serif);margin-bottom:10px}
.cap p{font-size:13px;color:var(--ink-2);line-height:1.9}
.cap__tag{display:inline-block;margin-top:16px;font-size:10.5px;letter-spacing:.16em;color:var(--teal);border-top:1px dashed var(--line);padding-top:10px;width:100%}

/* ---------- 海南场景表 ---------- */
.hainan{background:var(--blue);color:var(--paper-3);position:relative;overflow:hidden}
.hainan::before{content:"HAINAN";position:absolute;right:-30px;top:10px;font:700 130px var(--serif);color:rgba(255,255,255,.05);letter-spacing:.1em;pointer-events:none}
.scene-table{border:1px solid rgba(255,255,255,.22);background:rgba(0,0,0,.08);position:relative}
.scene-row{display:grid;grid-template-columns:1.05fr 1.7fr .8fr 1.35fr;gap:0;border-bottom:1px solid rgba(255,255,255,.14)}
.scene-row:last-child{border-bottom:0}
.scene-row>span{padding:16px 18px;font-size:12.8px;line-height:1.7;border-right:1px solid rgba(255,255,255,.12)}
.scene-row>span:last-child{border-right:0;color:#DCEAE3}
.scene-row--head{background:rgba(0,0,0,.2)}
.scene-row--head>span{font-size:11px;letter-spacing:.14em;font-weight:700;color:#A9D2E3;padding:12px 18px}
.scene-row b{display:block;font:700 14.5px var(--serif);color:#fff}
.scene-row small{display:block;font-size:11px;color:#A9C7D6;margin-top:3px}
.lv{display:inline-block;font:700 10.5px var(--sans);font-style:normal;padding:3px 7px;margin:2px 4px 2px 0;border:1px solid rgba(255,255,255,.4);color:#fff}
.lv--1{border-color:#9FD3C3;color:#9FD3C3}.lv--2{border-color:#F0C978;color:#F0C978}.lv--3{border-color:#D9B7EA;color:#D9B7EA}.lv--4{border-color:#F2A98F;color:#F2A98F}.lv--a{border-color:#fff;color:#fff}
.hainan__foot{margin-top:20px;font-size:12.5px;color:#BBD8E4}

/* ---------- 案例 ---------- */
.cases{background:var(--paper)}
.case-tabs{display:flex;gap:0;border-bottom:2px solid var(--ink);margin-bottom:30px}
.case-tab{background:transparent;border:0;border-bottom:3px solid transparent;margin-bottom:-2px;padding:13px 24px;font-size:14px;font-weight:700;color:var(--muted);display:flex;align-items:center;gap:9px}
.case-tab span{font-size:10.5px;background:var(--paper-2);padding:2px 7px}
.case-tab.is-active{color:var(--ink);border-bottom-color:var(--coral)}
.case-tab.is-active span{background:var(--coral);color:#fff}
.case-panel{display:none;grid-template-columns:repeat(3,1fr);gap:18px}
.case-panel.is-active{display:grid}
.case-card{background:var(--white);border:1px solid var(--line);padding:24px 22px 20px;position:relative;box-shadow:var(--hard);display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}
.case-card:hover{transform:translate(-3px,-3px);box-shadow:9px 9px 0 rgba(30,42,40,.16)}
.case-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--blue)}
.case-card__no{position:absolute;top:14px;right:16px;font-size:10px;letter-spacing:.14em;color:var(--muted)}
.tag{display:inline-block;align-self:flex-start;font-size:10.5px;letter-spacing:.1em;font-weight:700;padding:4px 9px;margin-bottom:14px;background:rgba(44,110,155,.12);color:var(--blue)}
.tag--teal{background:rgba(14,124,107,.12);color:var(--teal)}
.tag--amber{background:rgba(209,154,53,.16);color:#9A6E1B}
.tag--violet{background:rgba(111,76,150,.12);color:var(--violet)}
.tag--coral{background:rgba(219,101,71,.12);color:var(--coral)}
.case-card h3{font:700 18px/1.5 var(--serif);margin-bottom:10px;padding-right:56px}
.case-card>p{font-size:12.8px;color:var(--ink-2);line-height:1.85}
.case-meta{margin:14px 0;border-top:1px dashed var(--line)}
.case-meta li{font-size:11.5px;color:var(--muted);padding:5px 0;border-bottom:1px dashed var(--line)}
.case-out{margin-top:auto;font-size:11.8px;line-height:1.7;background:var(--paper-2);padding:9px 10px}
.case-out b{color:var(--teal);margin-right:6px}
.case-note{margin-top:26px;padding:16px 18px;border-left:3px solid var(--amber);background:rgba(209,154,53,.09);font-size:12px;color:var(--ink-2);line-height:1.9}

/* ---------- 现场手记 ---------- */
.notes{background:var(--ink);color:var(--paper-3);padding:64px 0}
.notes__inner{display:grid;grid-template-columns:.7fr 2fr;gap:44px;align-items:start}
.notes__head h2{font:700 32px var(--serif);margin-bottom:10px}
.notes__head>p:not(.kicker){font-size:13px;color:#A9BCB4}
.notes__list{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.14)}
.note{background:var(--ink);padding:24px 22px;display:flex;flex-direction:column;transition:background .25s}
.note:hover{background:#253632}
.note__cat{font-size:10.5px;letter-spacing:.12em;color:#9FD3C3;margin-bottom:12px}
.note h3{font:700 17px/1.55 var(--serif);margin-bottom:10px}
.note p{font-size:12.5px;color:#A9BCB4;line-height:1.85;flex:1}
.note__more{margin-top:16px;font-size:11.5px;color:#F0C978;font-weight:700}

/* ---------- FDE 标准化产品落地 · 三档报价 ---------- */
.pricing{background:linear-gradient(180deg,var(--paper),#EFEAE0);border-top:1px solid var(--line)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
.price-card{background:var(--white);border:1px solid var(--line);padding:28px 26px 24px;display:flex;flex-direction:column;position:relative;box-shadow:var(--hard)}
.price-card::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:var(--blue)}
.price-card--main::before{background:var(--teal)}
.price-card--custom::before{background:var(--violet)}
.price-card__no{font-size:10.5px;letter-spacing:.2em;color:var(--muted);font-weight:700}
.price-card__badge{position:absolute;top:-13px;right:20px;background:var(--teal);color:#fff;font-size:11px;font-weight:700;padding:5px 12px;letter-spacing:.08em}
.price-card__head{padding:16px 0 18px;border-bottom:1px dashed var(--line)}
.price-card__head h3{font:700 24px var(--serif);margin-bottom:4px}
.price-card__for{font-size:12.5px;color:var(--muted)}
.price-card__amount{font:700 clamp(34px,3.6vw,46px)/1.1 var(--serif);color:var(--ink);padding:20px 0 6px;letter-spacing:-.02em;white-space:nowrap}
.price-card__amount .cur{font-size:.55em;vertical-align:.22em;margin-right:3px;color:var(--coral)}
.price-card__amount .unit{display:block;font:400 11.5px var(--sans);letter-spacing:.04em;color:var(--muted);margin-top:8px}
.price-card__amount--text{font-size:clamp(28px,2.8vw,36px);color:var(--violet)}
.price-card--main .price-card__amount{color:var(--teal)}
.price-card__spec{margin:14px 0 0}
.price-card__spec div{display:flex;gap:12px;padding:6px 0;border-top:1px dashed var(--line);font-size:12px}
.price-card__spec dt{flex:none;width:62px;color:var(--muted)}
.price-card__spec dd{color:var(--ink-2)}
.price-card__list{margin:18px 0 22px;flex:1}
.price-card__list li{position:relative;padding:8px 0 8px 18px;font-size:12.8px;line-height:1.7;color:var(--ink-2);border-bottom:1px dashed var(--line)}
.price-card__list li::before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:700}
.price-card__cta{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--ink);color:var(--paper-3);padding:13px 16px;font-size:13.5px;font-weight:700;transition:background .2s,gap .2s}
.price-card__cta:hover{background:var(--teal);gap:18px}
.price-card--main .price-card__cta{background:var(--teal);color:#fff}
.price-card--main .price-card__cta:hover{background:var(--ink)}
.price-terms{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:30px}
.price-terms>div{background:var(--paper-3);padding:20px 22px}
.price-terms__n{font:700 26px/1 var(--serif);color:transparent;-webkit-text-stroke:1.2px rgba(30,42,40,.35)}
.price-terms h4{font:700 16px var(--serif);margin:10px 0 6px}
.price-terms p{font-size:12.3px;line-height:1.85;color:var(--ink-2)}
.price-terms strong{color:var(--teal)}
.price-note{margin-top:18px;font-size:12px;color:var(--muted)}
.price-note a{color:var(--teal);font-weight:700;border-bottom:1px solid var(--teal)}

/* ---------- 合作路径 / FAQ ---------- */
.partner{background:var(--paper-3)}
.entry-bar{display:grid;grid-template-columns:repeat(3,1fr);border-top:2px solid var(--ink);border-bottom:1px solid var(--line)}
.entry-bar>div{padding:24px 24px 26px;border-right:1px dashed var(--line)}
.entry-bar>div:last-child{border-right:0}
.entry-bar__n{font:700 30px/1 var(--serif);color:transparent;-webkit-text-stroke:1.2px rgba(30,42,40,.35)}
.entry-bar h3{font:700 18px var(--serif);margin:12px 0 7px}
.entry-bar p{font-size:12.8px;line-height:1.85;color:var(--ink-2)}
.faq{display:grid;grid-template-columns:.65fr 1.35fr;gap:44px;margin-top:64px;padding-top:44px;border-top:1px solid var(--line)}
.faq__intro h3{font:700 30px/1.4 var(--serif);margin-bottom:12px}
.faq__intro>p:last-child{font-size:13px;color:var(--muted)}
.faq__list details{border-bottom:1px solid var(--line)}
.faq__list details:first-child{border-top:1px solid var(--line)}
.faq__list summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:17px 4px;font-size:14.5px;font-weight:700}
.faq__list summary::-webkit-details-marker{display:none}
.faq__list summary span{font-size:20px;color:var(--coral);font-weight:400;transition:transform .25s}
.faq__list details[open] summary span{transform:rotate(45deg)}
.faq__list details[open] summary{color:var(--teal)}
.faq__list details p{font-size:13.2px;line-height:1.95;color:var(--ink-2);padding:0 26px 18px 4px}
.faq__list details p strong{color:var(--teal)}

/* ---------- 联系 ---------- */
.contact{background:var(--ink);color:var(--paper-3);padding:88px 0}
.contact__inner{display:grid;grid-template-columns:1fr .92fr;gap:64px;align-items:start}
.contact h2{font:700 clamp(28px,3.4vw,42px)/1.4 var(--serif);margin-bottom:18px}
.contact h2 em{color:#F0C978}
.contact__copy>p:not(.kicker):not(.contact__tip){font-size:14px;line-height:2;color:#B9CCC3;max-width:34em}
.contact__info{margin-top:34px;border-top:1px solid rgba(255,255,255,.18)}
.contact__info div{display:flex;gap:20px;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:13px}
.contact__info span{flex:none;width:76px;color:#8FA69D}
.contact__info strong{color:#DCE9E2;font-weight:600}
.contact__tip{margin-top:22px;font-size:11.5px;color:#869C93;line-height:1.8}
.contact__form{background:var(--paper-3);color:var(--ink);padding:30px 28px;border:1px solid rgba(255,255,255,.2);box-shadow:10px 10px 0 rgba(240,201,120,.25)}
.field{margin-bottom:16px}
.field label{display:block;font-size:12.5px;font-weight:700;margin-bottom:7px}
.field label span{color:var(--coral)}
.field input,.field select,.field textarea{width:100%;background:var(--white);border:1px solid var(--line);border-radius:0;padding:11px 12px;font-size:13.5px;color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(14,124,107,.12)}
.field input::placeholder,.field textarea::placeholder{color:#9AA8A2}
.field textarea{resize:vertical;min-height:96px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field input.is-error,.field select.is-error{border-color:var(--coral);background:#FFF6F3}
.form-status{margin-top:12px;font-size:12.5px;min-height:1.4em;color:var(--teal);font-weight:700}
.form-status.is-error{color:var(--coral)}

/* ---------- 页脚 ---------- */
.site-footer{background:#141E1C;color:#A9BCB4;padding:56px 0 26px}
.footer__top{display:grid;grid-template-columns:1fr 1.3fr;gap:50px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.12)}
.brand--footer .brand__text{color:var(--paper-3)}
.footer__brand p{font-size:13px;line-height:1.9;margin-top:16px}
.footer__nav{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer__nav h4{font-size:12px;letter-spacing:.14em;color:var(--paper-3);margin-bottom:14px}
.footer__nav a{display:block;font-size:12.5px;padding:5px 0;color:#A9BCB4;transition:color .2s}
.footer__nav a:hover{color:#F0C978}
.footer__bottom{padding-top:22px;display:grid;grid-template-columns:.8fr 1.6fr;gap:34px;font-size:11.5px;line-height:1.85}
.footer__disclaimer{color:#7E938B}

/* ---------- 显式补充（保证结构类都有对应规则） ---------- */
.hl{isolation:isolate}
.hero__copy{min-width:0}
.sec-head__main{min-width:0}
.bline--train{background:var(--paper-3)}
.tag--blue{background:rgba(44,110,155,.12);color:var(--blue)}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav{gap:14px}.nav a{font-size:12.5px}
  .hero__inner{gap:40px}
  .scene-row{grid-template-columns:1fr 1.5fr .7fr 1.2fr}
  .stair{min-height:380px;padding:20px 17px}
  .contentline__flow span{min-width:105px;font-size:12px}
}
@media (max-width:980px){
  .wrap{width:min(100% - 40px,var(--wrap))}
  .header__cta{display:none}
  .menu-toggle{display:flex;margin-left:auto}
  .nav{position:absolute;top:100%;left:0;right:0;background:var(--paper-3);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:8px 20px 18px;display:none;box-shadow:0 16px 24px rgba(30,42,40,.12)}
  .nav.is-open{display:flex}
  .nav a{padding:12px 0;border-bottom:1px dashed var(--line);font-size:14px}
  .hero{padding:56px 0 72px}
  .hero__inner,.contact__inner,.notes__inner,.faq,.marketband__inner{grid-template-columns:1fr;gap:40px}
  .dossier{max-width:520px}
  .sec-head{grid-template-columns:44px 1fr;gap:18px}
  .sec-head__note{grid-column:2}
  .business__grid,.versus__grid{grid-template-columns:1fr}
  .versus__vs{padding:12px 0}
  .stairs{grid-template-columns:repeat(2,1fr)}
  .stair--1,.stair--2,.stair--3,.stair--4{margin-top:0}
  .stair{min-height:0}
  .track{grid-template-columns:repeat(3,1fr);row-gap:34px}
  .track::before{display:none}
  .track__dot{top:-27px}
  .cap-grid,.case-panel.is-active{grid-template-columns:repeat(2,1fr)}
  .price-grid,.price-terms,.entry-bar{grid-template-columns:1fr}
  .entry-bar>div{border-right:0;border-bottom:1px dashed var(--line)}
  .entry-bar>div:last-child{border-bottom:0}
  .deploy__note{grid-template-columns:1fr 1fr}
  .scene-row{grid-template-columns:1fr 1fr}
  .scene-row--head{display:none}
  .scene-row>span{border-bottom:1px solid rgba(255,255,255,.1)}
  .footer__top,.footer__bottom{grid-template-columns:1fr}
  .agent-add{flex-wrap:wrap}.agent-add__tag{margin-left:0}
  .fde__foot{grid-template-columns:1fr}
}
@media (max-width:640px){
  .wrap{width:calc(100% - 32px)}
  .topbar__inner>span:last-child{display:none}
  .section{padding:66px 0}
  .hero h1{font-size:38px}
  .hero__stats{flex-wrap:wrap;gap:16px 0}
  .hero__stats>div{flex:0 0 50%;border:0;margin:0;padding:0}
  .claimbar__inner{flex-wrap:wrap;gap:14px}
  .claimbar__tags{width:100%}
  .sec-head{grid-template-columns:1fr;gap:12px}
  .sec-head__rail{display:none}
  .sec-head__note{grid-column:1}
  .sec-head h2{font-size:29px}
  .bline,.case-card,.plan,.cap{padding:22px 18px}
  .stairs,.cap-grid,.case-panel.is-active,.price-grid,.price-terms,.entry-bar,.deploy__note,.notes__list,.track,.contentline__flow,.fde__foot{grid-template-columns:1fr}
  .contentline__flow{display:block}
  .contentline__flow span{display:block;margin-bottom:8px}
  .contentline__flow b{display:none}
  .track{gap:0}
  .track li{border-right:0;border-bottom:1px dashed var(--line);padding:0 0 18px;margin-bottom:18px}
  .track__dot{position:static;display:block;margin-bottom:10px}
  .track p{min-height:0}
  .scene-row{grid-template-columns:1fr}
  .scene-row>span{border-right:0}
  .case-tab{padding:11px 12px;font-size:12.5px;flex:1;justify-content:center}
  .field-row{grid-template-columns:1fr;gap:0}
  .contact__form{padding:22px 18px}
  .footer__nav{grid-template-columns:1fr 1fr}
  .dossier{padding:22px 18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}