/* ============================================================
   丰火达科技 · AI 官网  —  视觉系统 v3
   方向：暖纸底 + 墨黑 + 金/翡翠双强调色（避开套路 AI 蓝紫）
   字体：Space Grotesk（拉丁/数字·本地自托管） + 中文走系统字体栈（PingFang SC / 微软雅黑，零外部加载）
   原则：强对比层级 / 8px 栅格 / 留白克制 / 动效仅用 transform·opacity
   ============================================================ */

/* 字体自托管：Space Grotesk 本地加载（拉丁/数字展示用），中文走系统字体栈，彻底去除 Google Fonts 外部请求 */
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:400;font-display:swap;src:url("../fonts/space-grotesk-400.woff2") format("woff2");}
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:500;font-display:swap;src:url("../fonts/space-grotesk-500.woff2") format("woff2");}
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:600;font-display:swap;src:url("../fonts/space-grotesk-600.woff2") format("woff2");}
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:700;font-display:swap;src:url("../fonts/space-grotesk-700.woff2") format("woff2");}

:root{
  --paper:#F4F1EA;          /* 暖纸底 */
  --paper-2:#ECE7DC;        /* 次级底色 */
  --surface:#FBFAF6;        /* 卡片/玻璃面 */
  --ink:#17130C;            /* 近黑墨 */
  --ink-2:#3A332A;          /* 次级文字 */
  --muted:#726A5C;          /* 弱化文字 */
  --line:#DDD5C6;           /* 发丝分隔线 */
  --gold:#B6862C;           /* 金 · 主强调 */
  --gold-soft:#E7C873;
  --teal:#0E5C4E;           /* 翡翠 · AI 科技副强调 */
  --teal-soft:#3FA48C;
  --shadow:0 1px 2px rgba(23,19,12,.04),0 12px 32px -12px rgba(23,19,12,.18);
  --shadow-lg:0 24px 60px -20px rgba(23,19,12,.30);
  --radius:18px;
  --radius-sm:12px;
  --maxw:1200px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --font-display:"Space Grotesk","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:Georgia,"Songti SC","SimSun",serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.7;
  font-size:17px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{width:min(var(--maxw),92vw);margin-inline:auto}
section{position:relative;padding:clamp(64px,9vw,130px) 0}
.eyebrow{
  font-family:var(--font-display);
  font-size:13px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--gold);font-weight:600;
  display:inline-flex;align-items:center;gap:.7em;
}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--gold);display:inline-block}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.08;letter-spacing:-.02em;color:var(--ink);font-weight:700}
.section-title{font-size:clamp(30px,4.6vw,56px);max-width:18ch}
.section-lead{color:var(--muted);font-size:clamp(16px,1.6vw,19px);max-width:54ch;margin-top:18px}
.serif{font-family:var(--font-serif)}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px clamp(20px,4vw,40px);
  /* 始终带磨砂浅色条：无论 hero 背景深或浅，导航文字都清晰可读 */
  background:rgba(244,241,234,.82);
  -webkit-backdrop-filter:blur(16px) saturate(1.3);
  backdrop-filter:blur(16px) saturate(1.3);
  border-bottom:1px solid rgba(23,19,12,.08);
  box-shadow:0 8px 28px -20px rgba(23,19,12,.6);
  transition:background .4s var(--ease),box-shadow .4s var(--ease),padding .4s var(--ease);
}
.nav.scrolled{background:rgba(244,241,234,.94);box-shadow:0 10px 30px -18px rgba(23,19,12,.7);padding-block:11px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-display);font-weight:700;font-size:20px;letter-spacing:-.01em}
.brand-logo{height:42px;width:auto;display:block;background:var(--paper);border-radius:11px;padding:6px 10px}
.footer .brand-logo{background:var(--paper);height:48px}
.brand-name{display:flex;flex-direction:column;line-height:1.04;font-family:var(--font-display);font-weight:700;font-size:20px;letter-spacing:-.01em;color:var(--ink)}
.footer .brand-name{color:#fff}
.footer .brand-name small{color:rgba(255,255,255,.62)}
.brand .mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--gold),#7c5a16);color:#fff;font-size:17px;font-weight:700;
  box-shadow:0 6px 16px -6px rgba(182,134,44,.7);
}
.brand small{display:block;font-family:var(--font-body);font-size:11px;letter-spacing:.18em;color:var(--muted);font-weight:400}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{font-size:15px;color:var(--ink-2);position:relative;padding:6px 0;transition:color .25s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--gold);transition:width .3s var(--ease)}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-cta{background:var(--ink);color:var(--paper);padding:11px 22px;border-radius:999px;font-size:14px;font-weight:600;transition:transform .25s var(--ease),background .25s}
.nav-cta:hover{background:var(--gold);transform:translateY(-2px)}
.nav-item.has-dropdown{position:relative}
.nav-item.has-dropdown>a{display:flex;align-items:center;gap:4px}
.nav-item.has-dropdown .caret{font-size:10px;opacity:.7;transition:transform .25s var(--ease)}
.nav-item.has-dropdown:hover .caret{transform:rotate(180deg)}
.dropdown{position:absolute;top:100%;left:0;min-width:210px;background:var(--surface);box-shadow:var(--shadow-lg);border:1px solid var(--line);border-radius:14px;padding:8px;display:flex;flex-direction:column;gap:2px;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;z-index:60}
.nav-item.has-dropdown:hover .dropdown,.nav-item.has-dropdown:focus-within .dropdown{opacity:1;visibility:visible;transform:none}
.dropdown a{font-size:14px;color:var(--ink-2);padding:10px 12px;border-radius:9px;white-space:nowrap;transition:background .2s,color .2s}
.dropdown a:hover{background:var(--paper-2);color:var(--ink)}
.nav-toggle{display:none}

/* ---------- HERO ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;overflow:hidden;padding-top:90px}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;transform:scale(1.08);will-change:transform}
.hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(20,16,10,.92) 0%,rgba(20,16,10,.72) 38%,rgba(20,16,10,.35) 75%,rgba(20,16,10,.55) 100%)}
.hero-bg .grain{position:absolute;inset:0;opacity:.5;mix-blend-mode:overlay;
  background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);background-size:3px 3px}
.hero-inner{position:relative;z-index:2;width:min(var(--maxw),92vw);margin-inline:auto;color:#fff}
.hero h1{color:#fff;font-size:clamp(40px,7vw,92px);letter-spacing:-.03em;max-width:16ch}
.hero h1 .accent{color:var(--gold-soft);font-style:italic}
.hero .lead{margin-top:24px;font-size:clamp(17px,2vw,21px);color:rgba(255,255,255,.82);max-width:50ch;line-height:1.6}
.hero-actions{margin-top:40px;display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;border-radius:999px;font-weight:600;font-size:15px;transition:transform .3s var(--ease),box-shadow .3s,background .3s;will-change:transform}
.btn-gold{background:linear-gradient(135deg,var(--gold-soft),var(--gold));color:#231a06;box-shadow:0 14px 30px -10px rgba(182,134,44,.8)}
.btn-gold:hover{transform:translateY(-3px);box-shadow:0 20px 40px -12px rgba(182,134,44,.9)}
.btn-ghost{border:1px solid rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-3px)}
.hero-stats{margin-top:56px;display:flex;gap:clamp(24px,5vw,64px);flex-wrap:wrap}
.hero-stats .s{color:#fff}
.hero-stats .num{font-family:var(--font-display);font-size:clamp(30px,4vw,46px);font-weight:700;color:var(--gold-soft);line-height:1}
.hero-stats .lbl{font-size:13px;letter-spacing:.1em;color:rgba(255,255,255,.7);margin-top:6px}
.hero-scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:3;color:rgba(255,255,255,.7);font-size:12px;letter-spacing:.2em;display:flex;flex-direction:column;align-items:center;gap:8px}
.hero-scroll .line{width:1px;height:42px;background:linear-gradient(rgba(255,255,255,.7),transparent);animation:scrolly 1.8s var(--ease) infinite}
@keyframes scrolly{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
/* hero 右侧 AI 视觉 */
.hero-visual{position:absolute;right:clamp(20px,4vw,60px);top:50%;transform:translateY(-50%);width:min(42vw,520px);z-index:1;opacity:.95;pointer-events:none}
.hero-visual svg{width:100%;height:auto;filter:drop-shadow(0 20px 50px rgba(0,0,0,.4))}

/* ---------- 信任带 ---------- */
.trust{border-bottom:1px solid var(--line);background:var(--surface)}
.trust .container{display:flex;align-items:center;gap:clamp(20px,4vw,60px);flex-wrap:wrap;padding:26px 0}
.trust .tt{font-size:13px;letter-spacing:.16em;color:var(--muted);text-transform:uppercase;white-space:nowrap}
.marquee{flex:1;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee-track{display:flex;gap:38px;width:max-content;animation:scrollx 26s linear infinite}
.marquee-track span{font-family:var(--font-display);font-weight:600;color:var(--ink-2);white-space:nowrap;font-size:16px;display:inline-flex;align-items:center;gap:10px}
.marquee-track span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold)}
@keyframes scrollx{to{transform:translateX(-50%)}}

/* ---------- 通用区块头 ---------- */
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap;margin-bottom:clamp(34px,5vw,60px)}

/* ---------- 编辑式业务行 ---------- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,6vw,80px);align-items:center;margin-bottom:clamp(48px,7vw,96px)}
.feature:last-child{margin-bottom:0}
.feature .media{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:4/3}
.feature .media img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease-out)}
.feature:hover .media img{transform:scale(1.05)}
.feature .media .tag{position:absolute;top:16px;left:16px;background:rgba(244,241,234,.92);color:var(--ink);font-size:12px;font-weight:600;letter-spacing:.08em;padding:7px 14px;border-radius:999px;backdrop-filter:blur(6px)}
.feature .idx{font-family:var(--font-display);font-size:14px;color:var(--gold);font-weight:700;letter-spacing:.1em}
.feature h3{font-size:clamp(24px,3vw,36px);margin:10px 0 16px}
.feature p{color:var(--ink-2);font-size:17px}
.feature ul{list-style:none;margin-top:20px;display:grid;gap:11px}
.feature ul li{position:relative;padding-left:26px;color:var(--ink-2)}
.feature ul li::before{content:"";position:absolute;left:0;top:.62em;width:11px;height:11px;border-radius:3px;background:linear-gradient(135deg,var(--gold),var(--teal));transform:rotate(45deg)}
.feature .reverse &{}
.feature:nth-child(even) .media{order:2}
.feature .go{margin-top:24px;display:inline-flex;align-items:center;gap:8px;color:var(--gold);font-weight:600;font-size:15px}
.feature .go svg{transition:transform .3s var(--ease)}
.feature .go:hover svg{transform:translateX(5px)}

/* ---------- 能力矩阵 ---------- */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;position:relative;overflow:hidden;transition:transform .4s var(--ease),box-shadow .4s,border-color .4s}
.cap::before{content:"";position:absolute;inset:0;background:radial-gradient(120% 120% at 100% 0,rgba(182,134,44,.10),transparent 55%);opacity:0;transition:opacity .4s}
.cap:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--gold-soft)}
.cap:hover::before{opacity:1}
.cap .ico{width:56px;height:56px;border-radius:15px;display:grid;place-items:center;background:linear-gradient(140deg,rgba(182,134,44,.14),rgba(14,92,78,.12));color:var(--gold);margin-bottom:18px;box-shadow:inset 0 0 0 1px rgba(182,134,44,.25);transition:transform .5s var(--ease-out),box-shadow .4s,color .4s}
.cap:hover .ico{transform:translateY(-2px) scale(1.06);color:var(--teal);box-shadow:inset 0 0 0 1px rgba(14,92,78,.4),0 10px 30px rgba(182,134,44,.18)}
.cap .ico svg{width:30px;height:30px}
.cap-pattern{position:absolute;inset:0;z-index:0;opacity:.9;pointer-events:none;mix-blend-mode:multiply}
#capability .container{position:relative;z-index:1}
.cap{counter-increment:cap}
.cap::after{content:counter(cap,decimal-leading-zero);position:absolute;right:18px;top:10px;font-family:var(--font-display);font-size:40px;font-weight:700;color:rgba(182,134,44,.10);line-height:1;pointer-events:none}
.cap h4{font-size:20px;margin-bottom:8px}
.cap p{color:var(--muted);font-size:15px}
.cap .belt{margin-top:16px;display:flex;gap:8px;flex-wrap:wrap}
.cap .belt span{font-size:12px;color:var(--teal);background:rgba(14,92,78,.08);padding:4px 10px;border-radius:999px;font-weight:600}

/* ---------- AI 工作流可视化 ---------- */
.flow{background:var(--ink);color:#fff;border-radius:calc(var(--radius) + 8px);padding:clamp(36px,5vw,64px);position:relative;overflow:hidden}
.flow::after{content:"";position:absolute;inset:0;background:radial-gradient(60% 80% at 80% 10%,rgba(182,134,44,.22),transparent 60%);pointer-events:none}
.flow h3{color:#fff;font-size:clamp(26px,3.4vw,42px);max-width:20ch}
.flow .sub{color:rgba(255,255,255,.72);margin-top:14px;max-width:52ch}
.flow-wrap{margin-top:44px;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative}
.flow-node{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:22px 18px;position:relative;backdrop-filter:blur(4px)}
.flow-node .n{font-family:var(--font-display);font-size:13px;color:var(--gold-soft);font-weight:700;letter-spacing:.12em}
.flow-node h5{color:#fff;font-family:var(--font-display);font-size:18px;margin:8px 0 8px}
.flow-node p{color:rgba(255,255,255,.66);font-size:13.5px;line-height:1.55}
.flow-node .badge{margin-top:14px;font-size:12px;color:var(--teal-soft);border:1px solid rgba(63,164,140,.4);padding:3px 10px;border-radius:999px;display:inline-block}
.flow-connector{position:absolute;top:50%;left:0;right:0;height:2px;z-index:0;pointer-events:none}
.flow-connector svg{width:100%;height:40px;overflow:visible}
.flow-connector path{stroke:var(--gold-soft);stroke-width:2;fill:none;stroke-dasharray:6 8;opacity:.5}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .45s var(--ease),box-shadow .45s,border-color .45s}
.case-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--gold-soft)}
.case-card .thumb{aspect-ratio:16/10;overflow:hidden;position:relative;clip-path:inset(0 0 0 0)}
.case-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease-out)}
.case-card:hover .thumb img{transform:scale(1.07)}
.case-card .thumb .cat{position:absolute;top:14px;left:14px;background:rgba(23,19,12,.7);color:#fff;font-size:12px;font-weight:600;padding:6px 12px;border-radius:999px;backdrop-filter:blur(4px)}
.case-card .thumb .ai{position:absolute;top:14px;right:14px;background:var(--teal);color:#fff;font-size:11px;font-weight:700;padding:5px 11px;border-radius:999px;letter-spacing:.04em}
.case-card .body{padding:20px 22px 24px}
.case-card .body h4{font-size:19px;margin-bottom:8px;transition:color .25s}
.case-card:hover .body h4{color:var(--gold)}
.case-card .body p{color:var(--muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.case-card .body .more{margin-top:14px;font-size:13px;color:var(--gold);font-weight:600;display:inline-flex;gap:6px;align-items:center}

/* ---------- 关于 / 数据 ---------- */
.about{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(30px,5vw,70px);align-items:center}
.about .media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:1/1;position:relative}
.about .media img{width:100%;height:100%;object-fit:cover}
.about .media .badge{position:absolute;left:20px;bottom:20px;background:rgba(244,241,234,.92);border-radius:14px;padding:14px 18px;backdrop-filter:blur(8px);box-shadow:var(--shadow)}
.about .media .badge b{font-family:var(--font-display);font-size:26px;color:var(--gold);display:block;line-height:1}
.about .media .badge span{font-size:12px;color:var(--muted)}
.about h2{font-size:clamp(28px,3.6vw,44px);max-width:16ch}
.about p{color:var(--ink-2);margin-top:18px;font-size:17px}
.values{margin-top:26px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.values .v{display:flex;gap:12px;align-items:flex-start}
.values .v .dot{width:9px;height:9px;border-radius:50%;background:var(--gold);margin-top:9px;flex:none}
.values .v b{font-family:var(--font-display);font-size:16px;display:block}
.values .v small{color:var(--muted);font-size:14px}

.stats-band{background:var(--ink);color:#fff;border-radius:calc(var(--radius) + 8px);padding:clamp(34px,5vw,58px);display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;margin-top:clamp(40px,5vw,68px)}
.stats-band .num{font-family:var(--font-display);font-size:clamp(34px,5vw,58px);font-weight:700;color:var(--gold-soft);line-height:1}
.stats-band .lbl{color:rgba(255,255,255,.72);font-size:14px;margin-top:8px;letter-spacing:.04em}

/* ---------- 咨询培训 ---------- */
.consult{display:grid;grid-template-columns:1fr 1fr;gap:0;border-radius:calc(var(--radius) + 8px);overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid var(--line)}
.consult .media{position:relative;min-height:380px}
.consult .media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.consult .media::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(14,92,78,.15),rgba(23,19,12,.45))}
.consult .panel{padding:clamp(34px,4vw,56px);background:var(--surface)}
.consult h3{font-size:clamp(24px,3vw,34px);max-width:14ch}
.consult p{color:var(--ink-2);margin-top:16px}
.consult .list{margin-top:22px;display:grid;gap:14px}
.consult .list .it{display:flex;gap:14px;align-items:flex-start;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--paper)}
.consult .list .it .ic{width:38px;height:38px;border-radius:10px;background:var(--teal);color:#fff;display:grid;place-items:center;flex:none}
.consult .list .it b{font-family:var(--font-display);font-size:16px;display:block}
.consult .list .it small{color:var(--muted);font-size:14px}

/* ---------- FAQ ---------- */
.faq-list{margin-top:10px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:24px 4px;text-align:left;font-family:var(--font-display);font-size:clamp(17px,2vw,21px);font-weight:600;color:var(--ink);transition:color .25s}
.faq-q:hover{color:var(--gold)}
.faq-q .pm{flex:none;width:30px;height:30px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;transition:transform .35s var(--ease),background .3s,color .3s;font-size:18px;color:var(--muted)}
.faq-item.open .faq-q .pm{transform:rotate(45deg);background:var(--gold);color:#fff;border-color:var(--gold)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s var(--ease)}
.faq-a .inner{padding:0 4px 26px;color:var(--ink-2);font-size:16px;max-width:70ch}

/* ---------- CTA band ---------- */
.cta-band{position:relative;border-radius:calc(var(--radius) + 8px);overflow:hidden;color:#fff;text-align:center;padding:clamp(50px,7vw,96px) 24px}
.cta-band img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.cta-band::after{content:"";position:absolute;inset:0;background:linear-gradient(rgba(14,11,7,.72),rgba(14,11,7,.82));z-index:1}
.cta-band>*{position:relative;z-index:2}
.cta-band h2{color:#fff;font-size:clamp(30px,4.4vw,54px);max-width:20ch;margin-inline:auto}
.cta-band p{color:rgba(255,255,255,.82);margin-top:16px;font-size:18px}
.cta-band .hero-actions{justify-content:center}

/* ---------- 联系 / 页脚 ---------- */
.contact{display:grid;grid-template-columns:1.2fr .8fr;gap:clamp(30px,5vw,64px)}
.contact .info h2{font-size:clamp(28px,3.6vw,44px);max-width:16ch}
.contact .info p{color:var(--ink-2);margin-top:16px}
.contact .rows{margin-top:26px;display:grid;gap:14px}
.contact .rows .r{display:flex;gap:14px;align-items:flex-start}
.contact .rows .r .ic{width:42px;height:42px;border-radius:11px;background:var(--paper-2);color:var(--gold);display:grid;place-items:center;flex:none}
.contact .rows .r b{font-family:var(--font-display);font-size:15px;display:block}
.contact .rows .r small{color:var(--muted);font-size:14px}
.contact .card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.contact .card .qr{width:140px;height:140px;border-radius:14px;overflow:hidden;border:1px solid var(--line);margin:0 auto 14px}
.contact .card .qr img{width:100%;height:100%;object-fit:contain;background:#fff}
.contact .card .qt{text-align:center;font-size:14px;color:var(--muted)}
.contact .card .qt b{color:var(--ink);font-family:var(--font-display)}

footer{background:var(--ink);color:rgba(255,255,255,.7);padding:54px 0 30px;margin-top:clamp(60px,8vw,110px)}
footer .top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
footer .brand{color:#fff}
footer h6{color:#fff;font-family:var(--font-display);font-size:14px;letter-spacing:.1em;margin-bottom:16px;text-transform:uppercase}
footer ul{list-style:none;display:grid;gap:10px}
footer ul a{font-size:14px;color:rgba(255,255,255,.66);transition:color .25s}
footer ul a:hover{color:var(--gold-soft)}
footer .desc{font-size:14px;color:rgba(255,255,255,.6);margin-top:14px;max-width:34ch}
footer .bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:rgba(255,255,255,.5)}

/* ---------- 揭示动效基类 ---------- */
/* 渐进增强：默认可见（无 JS / 预览面板 / 爬虫也能看到），仅当 .js 类存在时才先做隐藏再滚动揭示 */
.reveal{opacity:1;transform:none}
.js .reveal{opacity:0;transform:translateY(34px);transition:opacity .9s var(--ease-out),transform .9s var(--ease-out)}
.js .reveal.in{opacity:1;transform:none}
.reveal-clip{clip-path:none}
.js .reveal-clip{clip-path:inset(0 100% 0 0);transition:clip-path 1.1s var(--ease-out)}
.js .reveal-clip.in{clip-path:inset(0 0 0 0)}
[data-delay="1"]{transition-delay:.08s}[data-delay="2"]{transition-delay:.16s}[data-delay="3"]{transition-delay:.24s}[data-delay="4"]{transition-delay:.32s}

/* ---------- 光标辉光 ---------- */
.cursor-glow{position:fixed;width:420px;height:420px;border-radius:50%;pointer-events:none;z-index:60;
  background:radial-gradient(circle,rgba(182,134,44,.14),transparent 60%);transform:translate(-50%,-50%);mix-blend-mode:multiply;transition:opacity .4s;opacity:0}
body:hover .cursor-glow{opacity:1}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  .feature,.about,.consult,.contact{grid-template-columns:1fr}
  .feature:nth-child(even) .media{order:0}
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .flow-wrap{grid-template-columns:repeat(2,1fr)}
  .stats-band{grid-template-columns:repeat(2,1fr)}
  .hero-visual{display:none}
  .consult .media{min-height:260px}
  footer .top{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
  body{font-size:16px}
  .nav-links{position:fixed;inset:0 0 auto 0;top:64px;flex-direction:column;background:var(--surface);padding:24px;gap:18px;box-shadow:var(--shadow-lg);transform:translateY(-120%);transition:transform .4s var(--ease);border-bottom:1px solid var(--line)}
  .nav-links.open{transform:none}
  .nav-toggle{display:grid;place-items:center;width:42px;height:42px;border-radius:10px;background:var(--paper-2);color:var(--ink)}
  .nav-item.has-dropdown .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:transparent;padding:4px 0 4px 14px;min-width:0}
  .nav-item.has-dropdown .caret{display:none}
  .nav-links .dropdown a{padding:8px 0}
  .cap-grid,.case-grid{grid-template-columns:1fr}
  .values{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .cta-band .hero-actions{flex-direction:column;align-items:stretch}
}

/* ====== 案例详情页 / 列表页（子页） ====== */
.page-case,.page-cases{padding-top:0}
.subnav{background:rgba(244,241,234,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.case-hero{position:relative;color:#fff;padding:120px 0 44px;overflow:hidden}
.case-hero .hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.case-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(20,16,10,.92),rgba(20,16,10,.55) 60%,rgba(20,16,10,.7));z-index:1}
.case-hero .container{position:relative;z-index:2}
.case-hero .back-link{display:inline-flex;align-items:center;gap:6px;color:rgba(255,255,255,.8);font-size:14px;margin-bottom:18px;transition:color .25s}
.case-hero .back-link:hover{color:var(--gold-soft)}
.case-hero .badge{display:inline-block;background:rgba(244,241,234,.16);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:13px;letter-spacing:.08em;padding:6px 14px;border-radius:999px;backdrop-filter:blur(4px)}
.case-hero h1.case-title{color:#fff;font-size:clamp(30px,5vw,60px);margin:16px 0 14px;max-width:20ch}
.case-hero .case-sub{color:rgba(255,255,255,.82);font-size:18px;max-width:60ch}
.case-hero .case-meta{margin-top:30px;display:flex;gap:clamp(20px,4vw,54px);flex-wrap:wrap}
.case-hero .case-meta div{display:flex;flex-direction:column;gap:4px}
.case-hero .case-meta span{font-size:12px;letter-spacing:.1em;color:rgba(255,255,255,.6);text-transform:uppercase}
.case-hero .case-meta b{font-family:var(--font-display);font-size:17px;color:#fff;font-weight:600}

/* 浅色卡片式 Hero（mode-card）：与暗色全幅形成明显不同的布局 */
.case-hero.mode-card{color:var(--ink);background:var(--paper);padding:120px 0 34px;overflow:visible}
.case-hero.mode-card .back-link{color:var(--muted)}
.case-hero.mode-card .back-link:hover{color:var(--gold)}
.case-hero.mode-card .badge{background:var(--paper-2);border:1px solid var(--line);color:var(--ink-2)}
.case-hero.mode-card h1.case-title{color:var(--ink)}
.case-hero.mode-card .case-sub{color:var(--ink-2)}
.case-hero.mode-card .case-meta{margin-top:26px}
.case-hero.mode-card .case-meta span{color:var(--muted)}
.case-hero.mode-card .case-meta b{color:var(--ink)}
.case-hero .hero-figure{margin-top:30px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:0 18px 50px rgba(20,16,10,.12)}
.case-hero .hero-img-card{width:100%;height:auto;display:block;max-height:520px;object-fit:cover}

/* 非架构图页面：核心架构要点（区别于通用架构图，避免千篇一律） */
.arch-keypoints{list-style:none;display:grid;gap:14px;margin-top:8px;counter-reset:k}
.arch-keypoints li{position:relative;padding:16px 18px 16px 56px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--ink-2);font-size:16px;line-height:1.6}
.arch-keypoints li::before{content:counter(k);counter-increment:k;position:absolute;left:14px;top:14px;width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--gold-soft),var(--gold));color:#231a06;font-family:var(--font-display);font-weight:700;font-size:14px;display:grid;place-items:center}

/* 宽幅图廊：更大更高的项目实景图，与常规图廊形成差别 */
.gallery.wide{grid-template-columns:repeat(3,1fr)}
.gallery.wide .g-item img{aspect-ratio:16/10;object-fit:cover;width:100%;height:auto}
.case-main{padding:clamp(34px,4vw,56px) 0 64px}
.case-block{margin-bottom:clamp(22px,3vw,38px)}
.case-block h2{font-size:clamp(22px,3vw,32px);display:flex;align-items:center;gap:14px;margin-bottom:18px}
.case-block h2 .idx{font-family:var(--font-display);font-size:15px;color:#fff;background:var(--gold);width:34px;height:34px;border-radius:9px;display:grid;place-items:center;flex:none}
.case-block p{color:var(--ink-2);font-size:17px;max-width:72ch}
.challenge,.solution{list-style:none;display:grid;gap:13px;margin-top:6px}
.challenge li,.solution li{position:relative;padding-left:30px;color:var(--ink-2);font-size:16px}
.challenge li::before{content:"";position:absolute;left:0;top:.5em;width:14px;height:14px;border-radius:4px;background:var(--teal);transform:rotate(45deg)}
.solution li::before{content:"";position:absolute;left:0;top:.5em;width:14px;height:14px;border-radius:4px;background:var(--gold);transform:rotate(45deg)}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:6px}
.metric{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:24px 18px;text-align:center}
.metric b{font-family:var(--font-display);font-size:clamp(26px,3vw,34px);color:var(--gold);display:block;line-height:1}
.metric span{color:var(--muted);font-size:13.5px;margin-top:8px;display:block}
.tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.tags .tag{background:var(--paper-2);padding:9px 17px;border-radius:999px;font-size:14px;font-weight:600;color:var(--ink-2)}
.case-cta{background:var(--ink);color:#fff;border-radius:var(--radius);padding:clamp(34px,4vw,52px);text-align:center;margin-top:14px}
.case-cta h3{color:#fff;font-size:clamp(22px,3vw,32px);max-width:24ch;margin:0 auto 22px}
.case-cta .btn-gold{background:linear-gradient(135deg,var(--gold-soft),var(--gold));color:#231a06;padding:14px 30px;border-radius:999px;font-weight:600;display:inline-block;transition:transform .3s var(--ease)}
.case-cta .btn-gold:hover{transform:translateY(-3px)}

/* ===== 案例详情页增强（配图 / 技术亮点 / 图廊 / 上下篇） ===== */
.challenge-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}
.ch-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:22px 20px;position:relative;transition:transform .4s var(--ease),border-color .4s,box-shadow .4s}
.ch-card:hover{transform:translateY(-5px);border-color:var(--gold-soft);box-shadow:var(--shadow)}
.ch-card .ch-n{font-family:var(--font-display);font-size:14px;font-weight:700;color:#fff;background:var(--teal);width:28px;height:28px;border-radius:8px;display:grid;place-items:center;margin-bottom:12px}
.ch-card p{color:var(--ink-2);font-size:15.5px;margin:0;line-height:1.65}
.arch-fig{margin:8px 0 4px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:22px;overflow:hidden}
.arch-fig svg{width:100%;height:auto;display:block}
.arch-fig figcaption{margin-top:14px;color:var(--muted);font-size:14px;text-align:center;line-height:1.6}
.tech-highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}
.hl-card{background:linear-gradient(160deg,var(--surface),var(--paper-2));border:1px solid var(--line);border-radius:var(--radius-sm);padding:24px 22px;transition:transform .4s var(--ease),border-color .4s,box-shadow .4s}
.hl-card:hover{transform:translateY(-6px);border-color:var(--gold-soft);box-shadow:var(--shadow)}
.hl-ic{width:46px;height:46px;border-radius:12px;background:rgba(182,134,44,.12);color:var(--gold);display:grid;place-items:center;margin-bottom:14px}
.hl-ic svg{width:26px;height:26px}
.hl-card h4{font-size:17px;margin-bottom:8px}
.hl-card p{color:var(--ink-2);font-size:14.5px;margin:0;line-height:1.6}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:8px}
.g-item{border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:var(--paper-2)}
.g-item img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease-out)}
.g-item:hover img{transform:scale(1.05)}
.case-quote{background:var(--paper-2);border-left:4px solid var(--gold);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:20px 24px;color:var(--ink-2);font-size:16.5px;margin-top:18px;line-height:1.7}
.case-nav{display:flex;gap:16px;margin-top:36px}
.case-nav a{flex:1;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 22px;transition:border-color .3s,transform .3s var(--ease);display:block}
.case-nav a:hover{border-color:var(--gold-soft);transform:translateY(-3px)}
.case-nav .lbl{font-size:12px;color:var(--muted);letter-spacing:.08em;display:block}
.case-nav .ttl{font-family:var(--font-display);font-weight:700;font-size:17px;margin-top:6px;color:var(--ink);display:block;line-height:1.4}
.case-nav .next{text-align:right}
.related-cases{margin-top:34px}
.related-cases .rc-title{font-family:var(--font-display);font-size:20px;font-weight:700;margin-bottom:16px;color:var(--ink)}
.related-cases .rc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.related-cases .rc-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;transition:border-color .3s,transform .3s var(--ease)}
.related-cases .rc-card:hover{border-color:var(--gold-soft);transform:translateY(-3px)}
.related-cases .rc-cat{display:inline-block;font-size:12px;color:var(--gold);letter-spacing:.05em;margin-bottom:8px}
.related-cases .rc-ttl{display:block;font-family:var(--font-display);font-weight:600;font-size:16px;line-height:1.4;color:var(--ink)}

/* ===== 首页案例入口增强 ===== */
.cases-cta{display:flex;flex-direction:column;align-items:flex-end;gap:10px;text-align:right}
.cases-cta-note{font-size:13px;color:var(--muted);letter-spacing:.04em;margin:0}
.cases-cta-btn{font-size:17px;padding:15px 30px;border-radius:999px;font-weight:700;display:inline-flex;align-items:center;gap:10px}
.cases-cta-btn span{transition:transform .3s var(--ease)}
.cases-cta-btn:hover span{transform:translateX(5px)}

@media(max-width:760px){
  .challenge-cards,.tech-highlights,.gallery{grid-template-columns:1fr}
  .cases-cta{align-items:flex-start;text-align:left}
}
/* 列表页筛选 */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:36px}
.filter{border:1px solid var(--line);background:var(--surface);padding:9px 18px;border-radius:999px;font-size:14px;color:var(--ink-2);cursor:pointer;transition:all .25s var(--ease)}
.filter:hover{border-color:var(--gold-soft)}
.filter.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.case-card .body .cat2{font-size:12px;color:var(--gold);font-weight:600;letter-spacing:.04em;margin-bottom:6px;display:block}

@media(max-width:620px){
  .metrics{grid-template-columns:1fr}
  .case-hero{padding-top:120px}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal,.reveal-clip{opacity:1!important;transform:none!important;clip-path:none!important}
  .hero-bg img{transform:none}
}