/* ============================================
   木屿控股 v3 — Google 风格设计系统
   ============================================ */

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
:root{
  --bg:#ffffff;
  --bg-2:#f8f9fa;
  --bg-3:#f1f3f4;
  --line:rgba(32,33,36,.08);
  --line-2:rgba(32,33,36,.16);
  --text:#202124;
  --text-2:#5f6368;
  --text-3:#80868b;
  --blue:#4285F4;
  --blue-dark:#3367d6;
  --red:#EA4335;
  --yellow:#FBBC04;
  --yellow-dark:#b06000;
  --green:#34A853;
  --blue-tint:rgba(66,133,244,.10);
  --red-tint:rgba(234,67,53,.10);
  --yellow-tint:rgba(251,188,4,.12);
  --green-tint:rgba(52,168,83,.10);
  --shadow-sm:0 1px 2px rgba(32,33,36,.06);
  --shadow-md:0 4px 16px rgba(32,33,36,.08);
  --shadow-lg:0 8px 28px rgba(32,33,36,.10);
  --radius-sm:8px;
  --radius:12px;
  --radius-lg:18px;
  --radius-xl:24px;
  --radius-2xl:28px;
  --container:1200px;
  --nav-h:64px;
}
body{
  font-family:'Roboto','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  background:var(--bg);color:var(--text);
  font-weight:400;line-height:1.55;
  overflow-x:hidden;letter-spacing:.005em;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;border:0;background:transparent;cursor:pointer;color:inherit}
input,textarea,select{font:inherit}
ul{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:9999;
  height:var(--nav-h);
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s;
}
.nav.is-scrolled{box-shadow:var(--shadow-sm)}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:500;letter-spacing:.005em}
.nav-logo-mark{
  width:30px;height:30px;border-radius:0;background:#fff;
  object-fit:contain;padding:0;
}
.nav-links{display:flex;gap:30px}
.nav-links a{
  font-size:14px;font-weight:500;color:var(--text-2);
  padding:6px 2px;position:relative;transition:color .2s;
}
.nav-links a:hover{color:var(--blue)}
.nav-links a.is-active{color:var(--blue)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-22px;
  height:2px;background:var(--blue);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:10px}
.btn-text{font-size:14px;font-weight:500;color:var(--text-2);padding:8px 12px;border-radius:20px;transition:background .2s,color .2s}
.btn-text:hover{background:var(--bg-3);color:var(--text)}
.btn-filled{
  font-size:14px;font-weight:500;color:#fff;
  background:var(--blue);padding:9px 22px;border-radius:8px;
  transition:background .2s,box-shadow .2s,transform .2s;
}
.btn-filled:hover{background:var(--blue-dark);box-shadow:0 1px 3px rgba(66,133,244,.32);transform:translateY(-1px)}
.nav-toggle{
  display:none;width:36px;height:36px;border-radius:8px;
  align-items:center;justify-content:center;
}
.nav-toggle span{width:18px;height:2px;background:var(--text);position:relative;display:block}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- buttons ---------- */
.btn-pill{
  font-size:15px;font-weight:500;color:#fff;
  background:var(--blue);padding:13px 30px;border-radius:24px;
  display:inline-flex;align-items:center;gap:8px;
  transition:background .2s,box-shadow .2s,transform .2s;
}
.btn-pill:hover{background:var(--blue-dark);box-shadow:0 2px 8px rgba(66,133,244,.28);transform:translateY(-1px)}
.btn-outline{
  font-size:15px;font-weight:500;color:var(--blue);
  background:transparent;padding:13px 30px;border-radius:24px;
  border:1.5px solid var(--blue-tint);
  display:inline-flex;align-items:center;gap:8px;
  transition:background .2s,border-color .2s;
}
.btn-outline:hover{background:var(--blue-tint);border-color:var(--blue)}

/* ---------- sections ---------- */
.section{padding:96px 24px}
.section.section-tight{padding:72px 24px}
.section-head{text-align:center;margin-bottom:56px;max-width:760px;margin-left:auto;margin-right:auto}
.section-eyebrow{
  display:inline-block;font-size:13px;font-weight:500;
  color:var(--blue);letter-spacing:.08em;text-transform:uppercase;
  margin-bottom:14px;
}
.section-title{
  font-size:clamp(30px,4vw,44px);font-weight:700;
  line-height:1.15;letter-spacing:-.015em;margin-bottom:14px;
}
.section-sub{font-size:16px;color:var(--text-2);line-height:1.55}

/* ---------- chips ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;
  padding:6px 14px;border-radius:20px;
  background:var(--bg-3);color:var(--text-2);
}
.chip-blue{background:var(--blue-tint);color:var(--blue)}
.chip-red{background:var(--red-tint);color:var(--red)}
.chip-yellow{background:var(--yellow-tint);color:var(--yellow-dark)}
.chip-green{background:var(--green-tint);color:var(--green)}

/* ---------- HERO FULL (homepage) ---------- */
.hero-full{
  position:relative;overflow:hidden;
  min-height:calc(100vh - var(--nav-h));
  display:flex;align-items:center;justify-content:center;
  text-align:center;
  background:linear-gradient(180deg,#ffffff 0%,#f8f9fa 70%,#eef2f7 100%);
  padding:80px 24px 60px;
}
.hero-full::before{
  content:"";position:absolute;top:-180px;left:50%;transform:translateX(-50%);
  width:780px;height:780px;border-radius:50%;
  background:radial-gradient(circle,rgba(66,133,244,.10) 0%,transparent 65%);
  pointer-events:none;
}
.hero-full::after{
  content:"";position:absolute;bottom:-220px;right:-160px;
  width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(52,168,83,.08) 0%,transparent 65%);
  pointer-events:none;
}
.hero-full-inner{
  position:relative;z-index:2;max-width:980px;width:100%;
  display:flex;flex-direction:column;align-items:center;
}
.hero-full-chips{
  display:flex;justify-content:center;gap:8px;margin-bottom:32px;flex-wrap:wrap;
}
.hero-full-title{
  font-size:clamp(48px,7.6vw,96px);font-weight:700;
  line-height:1.05;letter-spacing:-.025em;
  margin-bottom:22px;color:var(--text);
}
.hero-full-title em{font-style:normal;color:var(--blue)}
.hero-full-sub{
  font-size:clamp(18px,2vw,24px);font-weight:400;
  color:var(--text-2);line-height:1.45;
  max-width:780px;margin:0 auto 14px;
}
.hero-full-sub-light{
  font-size:clamp(14px,1.3vw,16px);color:var(--text-3);
  line-height:1.55;max-width:680px;margin:0 auto 40px;
}
.hero-full-cta{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:64px}
.hero-full-trust{
  display:flex;flex-wrap:wrap;justify-content:center;
  gap:18px 36px;color:var(--text-3);font-size:13px;
  padding:24px 36px;background:#fff;border-radius:20px;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.hero-full-trust span{display:inline-flex;align-items:center;gap:8px}
.hero-full-trust i{font-style:normal;width:8px;height:8px;border-radius:50%;display:inline-block}
.hero-scroll-hint{
  position:absolute;bottom:24px;left:50%;transform:translateX(-50%);
  font-size:12px;color:var(--text-3);letter-spacing:.04em;
  display:flex;flex-direction:column;align-items:center;gap:6px;z-index:2;
}
.hero-scroll-hint::after{
  content:"";width:2px;height:24px;
  background:linear-gradient(180deg,var(--text-3),transparent);
  animation:hint-bounce 1.8s ease-in-out infinite;
}
@keyframes hint-bounce{
  0%,100%{transform:translateY(0);opacity:.8}
  50%{transform:translateY(8px);opacity:.3}
}

/* ---------- HERO PAGE (inner pages) ---------- */
.hero-page{
  padding:96px 24px 64px;text-align:center;
  background:linear-gradient(180deg,#ffffff 0%,#f8f9fa 100%);
  border-bottom:1px solid var(--line);
  position:relative;overflow:hidden;
}
.hero-page::before{
  content:"";position:absolute;top:-80px;left:50%;transform:translateX(-50%);
  width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle,rgba(66,133,244,.06) 0%,transparent 65%);
  pointer-events:none;
}
.hero-page-inner{position:relative;z-index:2;max-width:780px;margin:0 auto}
.hero-page-eyebrow{
  display:inline-block;font-size:13px;font-weight:500;
  color:var(--blue);letter-spacing:.08em;text-transform:uppercase;
  margin-bottom:14px;
}
.hero-page-title{
  font-size:clamp(36px,5vw,56px);font-weight:700;
  line-height:1.1;letter-spacing:-.02em;
  margin-bottom:16px;
}
.hero-page-sub{font-size:clamp(16px,1.6vw,19px);color:var(--text-2);line-height:1.5;max-width:620px;margin:0 auto}

/* ---------- stats grid ---------- */
.stats-grid{
  display:grid;gap:20px;
  grid-template-columns:repeat(3,1fr);
}
.stat-card{
  border-radius:var(--radius-lg);padding:32px;
  background:#fff;border:1px solid var(--line);
  display:flex;flex-direction:column;
  transition:box-shadow .25s,transform .25s,border-color .25s;
  position:relative;overflow:hidden;
}
.stat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--line-2)}
.stat-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
}
.stat-card.accent-blue::before{background:var(--blue)}
.stat-card.accent-red::before{background:var(--red)}
.stat-card.accent-yellow::before{background:var(--yellow)}
.stat-card.accent-green::before{background:var(--green)}
.stat-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;
  margin-bottom:18px;
}
.stat-tag i{width:6px;height:6px;border-radius:50%;display:inline-block}
.accent-blue .stat-tag{color:var(--blue)}
.accent-red .stat-tag{color:var(--red)}
.accent-yellow .stat-tag{color:var(--yellow-dark)}
.accent-green .stat-tag{color:var(--green)}
.accent-blue .stat-tag i{background:var(--blue)}
.accent-red .stat-tag i{background:var(--red)}
.accent-yellow .stat-tag i{background:var(--yellow)}
.accent-green .stat-tag i{background:var(--green)}
.stat-num{
  font-size:clamp(40px,5vw,64px);font-weight:700;
  line-height:1;letter-spacing:-.03em;color:var(--text);
  margin-bottom:8px;
}
.stat-num sup{font-size:.45em;color:inherit;margin-left:2px;font-weight:600;opacity:.85}
.stat-label{
  font-size:15px;font-weight:600;color:var(--text);
  margin-bottom:6px;
}
.stat-desc{
  font-size:13px;color:var(--text-3);line-height:1.5;
}
@media (max-width:800px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:480px){
  .stats-grid{grid-template-columns:1fr}
  .stat-card{padding:24px}
}

/* ---------- two-up ---------- */
.twoup{
  display:grid;
  /* 左 5 / 右 6 — 视觉重量更协调，且右栏文字优先 */
  grid-template-columns:5fr 7fr;
  gap:clamp(28px,4vw,72px);
  align-items:stretch; /* 等高对齐 */
}

/* ---------- 左栏：品牌叙事卡 ---------- */
.twoup-img{
  position:relative;
  border-radius:var(--radius-2xl);
  overflow:hidden;border:1px solid var(--line);
  /* 渐变 + 双重径向高光（更柔和的品牌色，但仍是淡蓝-淡绿过渡） */
  background:
    radial-gradient(120% 80% at 30% 10%,rgba(66,133,244,.28) 0%,transparent 55%),
    radial-gradient(110% 90% at 75% 90%,rgba(52,168,83,.22) 0%,transparent 60%),
    linear-gradient(160deg,#e9f2ff 0%,#eaf5ee 100%);
  display:flex;flex-direction:column;
  padding:clamp(20px,2.4vw,36px);
  min-height:100%; /* 与右栏等高 */
  isolation:isolate;
}
.twoup-img::after{
  /* 右上装饰圆 + 黄色径向 */
  content:"";position:absolute;
  top:-160px;right:-110px;width:340px;height:340px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(251,188,5,.18) 0%,transparent 65%);
  z-index:-1;
  pointer-events:none;
}
.twoup-img::before{
  /* 左下淡红色细装饰，呼应多色品牌 */
  content:"";position:absolute;
  bottom:-110px;left:-90px;width:240px;height:240px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(234,67,53,.10) 0%,transparent 70%);
  pointer-events:none;
}

.twoup-img-top{
  display:flex;justify-content:flex-start;
}
.twoup-img-eyebrow{
  display:inline-block;
  font-size:11px;font-weight:600;letter-spacing:.16em;
  color:var(--text-2);
  background:rgba(255,255,255,.7);
  border:1px solid rgba(255,255,255,.9);
  padding:5px 11px;border-radius:20px;
  backdrop-filter:blur(4px);
}

/* 中央 logo 浮卡：放大且更具份量 */
.twoup-img-mark{
  flex:1;display:flex;align-items:center;justify-content:center;
  padding:24px 0;
}
.twoup-img-mark img{
  width:200px;height:200px;
  border-radius:32px;
  background:#fff;
  padding:26px;
  box-shadow:
    0 1px 2px rgba(0,0,0,.06),
    0 12px 28px rgba(15,23,42,.10),
    0 30px 60px rgba(66,133,244,.16);
  transition:transform .4s cubic-bezier(.22,.61,.36,1);
}
.twoup-img:hover .twoup-img-mark img{transform:translateY(-4px) rotate(-1.5deg)}

.twoup-img-bottom{
  display:flex;flex-direction:column;align-items:center;
  gap:2px;
}
.twoup-brand-name{
  font-size:20px;font-weight:700;color:var(--text);
  letter-spacing:.04em;
}
.twoup-brand-en{
  font-size:12px;font-weight:500;
  color:var(--text-3);letter-spacing:.32em;
}

/* ---------- 右栏：标题与正文节奏 ---------- */
.twoup-text{
  display:flex;flex-direction:column;justify-content:center;
  gap:14px;
}

/* eyebrow chip */
.twoup-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  align-self:flex-start;
  font-size:12px;font-weight:600;letter-spacing:.16em;
  color:var(--blue);text-transform:uppercase;
}
.twoup-eyebrow .dot{
  width:6px;height:6px;border-radius:50%;background:var(--blue);
  box-shadow:0 0 0 4px var(--blue-tint);
}

.twoup-text h3{
  font-size:clamp(26px,2.6vw,36px);
  font-weight:700;letter-spacing:-.02em;
  line-height:1.22;
  margin:6px 0 6px;
  color:var(--text);
  text-wrap:balance;
}
.twoup-text h3 mark{
  /* 关键短语：Google-style 极简下划线 + 蓝色，保留可读性同时具强调 */
  background:transparent;color:inherit;
  font-weight:700;
  box-shadow:inset 0 -3px 0 var(--blue);
  padding:1px 0;
}

.twoup-text p{font-size:15.5px;color:var(--text-2);line-height:1.78;margin-bottom:0}
.twoup-text p+p{margin-top:6px}

/* bullet 列表：2×2 紧凑网格 + 大数字强调 */
.twoup-bullets{
  margin-top:22px;
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:10px 18px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.twoup-bullets li{
  display:flex;align-items:center;gap:12px;
  font-size:14px;color:var(--text);
  line-height:1.45;
}
.twoup-bullets li::before{
  content:"";flex-shrink:0;
  width:10px;height:10px;border-radius:50%;
  background:var(--blue);
  box-shadow:0 0 0 4px var(--blue-tint);
}
.twoup-bullets li:nth-child(2)::before{background:var(--red);box-shadow:0 0 0 4px rgba(234,67,53,.12)}
.twoup-bullets li:nth-child(3)::before{background:var(--yellow);box-shadow:0 0 0 4px rgba(251,188,5,.18)}
.twoup-bullets li:nth-child(4)::before{background:var(--green);box-shadow:0 0 0 4px rgba(52,168,83,.14)}
.twoup-bullets li b{
  font-size:18px;font-weight:700;color:var(--text);
  font-feature-settings:"tnum" 1;
  margin-right:2px;
}

/* 深色模式 */
[data-theme="dark"] .twoup-img{
  background:
    radial-gradient(120% 80% at 30% 10%,rgba(66,133,244,.30) 0%,transparent 60%),
    radial-gradient(110% 90% at 75% 90%,rgba(52,168,83,.22) 0%,transparent 60%),
    linear-gradient(160deg,#0f1825 0%,#0e1a16 100%);
}
[data-theme="dark"] .twoup-img-eyebrow{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1)}
[data-theme="dark"] .twoup-img-mark img{background:#fff}
[data-theme="dark"] .twoup-text h3 mark{box-shadow:inset 0 -3px 0 rgba(66,133,244,.35)}

/* ---------- services ---------- */
.section-services{background:var(--bg-2)}
.services-grid{
  display:grid;gap:20px;grid-template-columns:repeat(3,1fr);
}
.service-card{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:28px;
  display:flex;flex-direction:column;gap:14px;
  transition:box-shadow .25s,transform .25s,border-color .25s;
  position:relative;
}
.service-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:transparent}
.service-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:500;
  padding:5px 10px;border-radius:8px;
  align-self:flex-start;letter-spacing:.02em;
}
.tag-1{background:var(--blue-tint);color:var(--blue)}
.tag-2{background:var(--red-tint);color:var(--red)}
.tag-3{background:var(--yellow-tint);color:var(--yellow-dark)}
.tag-4{background:var(--green-tint);color:var(--green)}
.service-icon{
  width:48px;height:48px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:700;color:#fff;
}
.service-card h4{font-size:18px;font-weight:700;letter-spacing:-.005em}
.service-card p{font-size:14px;color:var(--text-2);line-height:1.6}
.service-arrow{
  margin-top:auto;font-size:13px;font-weight:500;
  display:inline-flex;align-items:center;gap:4px;
  color:var(--blue);transition:gap .2s;
}
.service-card:hover .service-arrow{gap:8px}

/* ---------- cases ---------- */
.cases-grid{
  display:grid;gap:22px;grid-template-columns:repeat(4,1fr);
}
.case-card{
  border-radius:var(--radius-lg);overflow:hidden;background:#fff;
  border:1px solid var(--line);
  transition:box-shadow .25s,transform .25s;
  display:flex;flex-direction:column;
}
.case-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.case-cover{
  aspect-ratio:4/3;position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  font-size:32px;font-weight:700;color:#fff;
}
.cover-blue{background:linear-gradient(135deg,#4285F4,#1a73e8)}
.cover-red{background:linear-gradient(135deg,#EA4335,#c5221f)}
.cover-yellow{background:linear-gradient(135deg,#FBBC04,#f29900);color:#7a4f00}
.cover-green{background:linear-gradient(135deg,#34A853,#188038)}
.cover-mix{background:linear-gradient(135deg,#4285F4 0%,#34A853 50%,#FBBC04 100%)}
.cover-mix2{background:linear-gradient(135deg,#EA4335 0%,#FBBC04 50%,#34A853 100%)}
.cover-night{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%)}
.cover-warm{background:linear-gradient(135deg,#ff7e5f 0%,#feb47b 100%)}
.case-cover-tag{
  position:absolute;top:12px;left:12px;
  font-size:11px;font-weight:500;
  padding:4px 10px;border-radius:8px;
  background:rgba(255,255,255,.94);color:var(--text);
}
.case-body{padding:18px 20px 22px}
.case-body h4{font-size:16px;font-weight:700;margin-bottom:6px;letter-spacing:-.005em}
.case-body p{font-size:13px;color:var(--text-2);line-height:1.5}

/* ---------- CTA block ---------- */
.cta-wrap{padding:80px 24px}
.cta{
  max-width:var(--container);margin:0 auto;border-radius:var(--radius-2xl);padding:72px 48px;
  background:linear-gradient(135deg,var(--blue) 0%,#1a73e8 100%);
  color:#fff;text-align:center;position:relative;overflow:hidden;
}
.cta::before{
  content:"";position:absolute;top:-100px;right:-100px;width:300px;height:300px;
  border-radius:50%;background:rgba(255,255,255,.08);
}
.cta::after{
  content:"";position:absolute;bottom:-120px;left:-80px;width:360px;height:360px;
  border-radius:50%;background:rgba(251,188,4,.18);
}
.cta-eyebrow{
  display:inline-block;font-size:13px;font-weight:500;
  background:rgba(255,255,255,.18);padding:6px 14px;border-radius:20px;
  margin-bottom:18px;position:relative;
}
.cta h3{
  font-size:clamp(28px,3.6vw,40px);font-weight:700;letter-spacing:-.015em;
  line-height:1.2;margin-bottom:14px;position:relative;
}
.cta p{font-size:16px;opacity:.92;max-width:560px;margin:0 auto 32px;position:relative;line-height:1.55}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;position:relative}
.cta-pill-white{
  font-size:15px;font-weight:500;color:var(--blue);
  background:#fff;padding:13px 30px;border-radius:24px;
  display:inline-flex;align-items:center;gap:8px;
  transition:transform .2s,box-shadow .2s;
}
.cta-pill-white:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(0,0,0,.18)}
.cta-pill-ghost{
  font-size:15px;font-weight:500;color:#fff;
  background:transparent;padding:13px 30px;border-radius:24px;
  border:1.5px solid rgba(255,255,255,.4);
  display:inline-flex;align-items:center;gap:8px;
  transition:background .2s,border-color .2s;
}
.cta-pill-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ---------- footer ---------- */
.footer{
  background:#fff;border-top:1px solid var(--line);
  padding:56px 24px 28px;
}
.footer-inner{
  max-width:var(--container);margin:0 auto;
  display:grid;grid-template-columns:2fr repeat(3,1fr);gap:36px;
}
.footer-brand p{font-size:13px;color:var(--text-2);line-height:1.6;margin-top:14px;max-width:280px}
.footer-col h5{font-size:13px;font-weight:700;color:var(--text);margin-bottom:14px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:9px}
.footer-col li a{font-size:13px;color:var(--text-2);transition:color .2s}
.footer-col li a:hover{color:var(--blue)}
.footer-bottom{
  max-width:var(--container);margin:36px auto 0;padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  font-size:12px;color:var(--text-3);
}
.footer-bottom .dots{display:flex;align-items:center;gap:8px}
.footer-bottom i{font-style:normal;width:8px;height:8px;border-radius:50%;display:inline-block}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .cases-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav-links{
    display:none;position:absolute;top:var(--nav-h);left:0;right:0;
    flex-direction:column;background:#fff;border-bottom:1px solid var(--line);
    padding:12px 24px 16px;gap:4px;box-shadow:var(--shadow-sm);
  }
  .nav-links.is-open{display:flex}
  .nav-links a{padding:10px 0;font-size:15px;border-bottom:1px solid var(--line)}
  .nav-links a:last-child{border-bottom:0}
  .nav-links a.is-active::after{display:none}
  .nav-toggle{display:inline-flex}
  .hero-full{padding:48px 22px 80px;min-height:auto}
  .hero-page{padding:64px 22px 48px}
  .section{padding:64px 22px}
  .twoup{grid-template-columns:1fr;gap:36px}
  .twoup-img{min-height:380px;order:-1}
  .twoup-img-mark img{width:160px;height:160px;border-radius:28px;padding:22px}
  .twoup-bullets{grid-template-columns:1fr;gap:10px}
  .services-grid{grid-template-columns:1fr}
  .cases-grid{grid-template-columns:1fr}
  .cta{padding:48px 24px}
  .footer-inner{grid-template-columns:1fr;gap:28px}
  .hero-full-trust{padding:18px 22px;gap:12px 22px}
}
@media (max-width:480px){
  .nav{padding:0 16px}
  .nav-logo{font-size:16px}
  .hero-full-title{font-size:42px}
  .hero-full-chips{gap:6px}
  .chip{font-size:12px;padding:5px 10px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}


/* ---------- cases list & detail ---------- */
.cases-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.case-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;transition:box-shadow .25s,transform .25s,border-color .25s;
}
.case-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:var(--line-2)}
.case-cover{
  position:relative;aspect-ratio:16/10;overflow:hidden;
  display:flex;align-items:flex-end;justify-content:flex-start;
  padding:18px;color:#fff;
  background:linear-gradient(135deg,var(--blue) 0%,var(--green) 100%);
}
.case-cover-img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
}
.case-cover-img-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,0) 40%,rgba(0,0,0,.5) 100%);
}
.case-cover-tag{
  position:relative;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  background:rgba(255,255,255,.95);color:var(--text);
  padding:5px 12px;border-radius:20px;
}
.case-cover-empty{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:80px;font-weight:700;letter-spacing:-.04em;color:rgba(255,255,255,.18);
}
.case-body{padding:22px 22px 20px;display:flex;flex-direction:column;flex:1}
.case-cat{font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--blue);margin-bottom:10px}
.case-card h3{font-size:18px;font-weight:700;line-height:1.35;color:var(--text);margin-bottom:10px;letter-spacing:-.01em}
.case-subtitle{font-size:13px;color:var(--text-3);margin-bottom:10px}
.case-summary{font-size:14px;color:var(--text-2);line-height:1.6;flex:1;margin-bottom:14px}
.case-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.case-tags span{font-size:11px;font-weight:500;background:var(--bg-3);color:var(--text-2);padding:3px 9px;border-radius:10px}
.case-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text-3);padding-top:14px;border-top:1px solid var(--line);margin-top:auto}
.case-more{display:inline-flex;align-items:center;gap:4px;font-size:13px;font-weight:600;color:var(--blue);margin-top:14px}
.case-card:hover .case-more{color:var(--blue-dark)}

/* 案例分类色带映射（按 Google 四色循环）*/
.case-card.accent-blue  .case-cover{background:linear-gradient(135deg,#4285F4 0%,#34A853 100%)}
.case-card.accent-red   .case-cover{background:linear-gradient(135deg,#EA4335 0%,#FBBC04 100%)}
.case-card.accent-yellow .case-cover{background:linear-gradient(135deg,#FBBC04 0%,#34A853 100%)}
.case-card.accent-green  .case-cover{background:linear-gradient(135deg,#34A853 0%,#4285F4 100%)}
.case-card.accent-blue  .case-cat{color:var(--blue)}
.case-card.accent-red   .case-cat{color:var(--red)}
.case-card.accent-yellow .case-cat{color:var(--yellow-dark)}
.case-card.accent-green  .case-cat{color:var(--green)}

/* case detail */
.case-hero{
  position:relative;min-height:60vh;display:flex;align-items:flex-end;justify-content:center;
  padding:0 24px 64px;color:#fff;text-align:center;overflow:hidden;
  background:linear-gradient(135deg,#4285F4 0%,#34A853 50%,#FBBC04 100%);
}
.case-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 0%,rgba(0,0,0,.45) 100%)}
.case-hero-inner{position:relative;z-index:2;max-width:880px;width:100%}
.case-hero-tag{display:inline-block;font-size:13px;font-weight:500;background:rgba(255,255,255,.95);color:var(--text);padding:6px 14px;border-radius:20px;margin-bottom:18px}
.case-hero-title{font-size:clamp(36px,5.4vw,64px);font-weight:700;line-height:1.1;letter-spacing:-.02em;margin-bottom:14px}
.case-hero-meta{display:flex;flex-wrap:wrap;justify-content:center;gap:20px;font-size:14px;opacity:.92}
.case-hero-meta span{display:inline-flex;align-items:center;gap:6px}
/* ============================================================
   CASE DETAIL（重做版：紧凑元数据条 + 块状内容 + 强化上下篇）
   ============================================================ */

/* ---------- 元数据条：委托方 strip + 4 项紧凑 grid ---------- */
.case-meta-strip{
  margin:-64px auto 0;
  max-width:1040px;
  position:relative;z-index:3;
  padding:0 24px;
  display:flex;flex-direction:column;gap:14px;
}
.case-meta-client{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:18px 24px;
  box-shadow:var(--shadow-md);
  position:relative;
  overflow:hidden;
}
.case-meta-client::before{
  content:"";position:absolute;
  left:0;top:0;bottom:0;width:5px;
  background:linear-gradient(180deg,var(--blue) 0%,var(--green) 50%,var(--yellow) 100%);
}
.case-meta-client-label{
  font-size:11px;font-weight:600;letter-spacing:.16em;
  color:var(--text-3);text-transform:uppercase;
}
.case-meta-client b{
  font-size:18px;font-weight:700;color:var(--text);
  letter-spacing:.005em;
}
.case-meta-badge{
  font-size:11px;font-weight:600;color:#806600;
  background:var(--yellow);padding:4px 10px;border-radius:20px;
  margin-left:auto;
}
.case-meta-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:12px;
}
.case-meta-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:16px 20px;
  box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;gap:4px;
  transition:transform .2s,box-shadow .2s;
}
.case-meta-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.case-meta-label{
  font-size:11px;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.08em;
}
.case-meta-value{
  font-size:15px;font-weight:600;color:var(--text);
  line-height:1.45;
}

/* ---------- 正文容器 ---------- */
.case-content{
  max-width:780px;margin:0 auto;padding:72px 24px 40px;
  font-size:16px;line-height:1.85;color:var(--text);
}
.case-content p{margin-bottom:18px;color:var(--text-2)}
.case-content strong{color:var(--text);font-weight:600}

/* ---------- 区块 ---------- */
.case-block{margin:48px 0}
.case-block-head{
  display:flex;align-items:baseline;justify-content:space-between;
  margin-bottom:18px;gap:14px;flex-wrap:wrap;
  border-bottom:1px solid var(--line);
  padding-bottom:14px;
}
.case-h2{
  font-size:24px;font-weight:700;letter-spacing:-.015em;
  display:inline-flex;align-items:center;gap:10px;
  position:relative;
}
.case-h2::before{
  content:"";display:inline-block;
  width:4px;height:24px;border-radius:2px;
  background:linear-gradient(180deg,var(--blue),var(--green));
}
.case-block-meta{
  font-size:12px;color:var(--text-3);
  letter-spacing:.04em;
}

/* ---------- 摘要正文（替代原 case-lead）---------- */
.case-summary{
  border:none;background:transparent;
  padding:0 0 0 22px;border-left:3px solid var(--blue-tint);
  margin:0 0 36px;
}
.case-summary-text{
  font-size:18.5px;line-height:1.7;color:var(--text);
  font-weight:400;letter-spacing:.005em;
  margin:0;
}
.case-summary-text::before{
  content:"“";
  font-size:38px;color:var(--blue-tint);
  margin-right:4px;font-weight:700;
  vertical-align:-12px;
}
[data-theme=dark] .case-summary-text::before{color:rgba(66,133,244,.4)}
.case-summary-text::after{
  content:"”";font-size:38px;color:var(--blue-tint);
  margin-left:4px;font-weight:700;
  vertical-align:-12px;
}

/* ---------- 图集 ---------- */
.case-gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:36px 0 8px}
.case-gallery-item{
  margin:0;cursor:zoom-in;overflow:hidden;
  border-radius:var(--radius);
  border:1px solid var(--line);background:var(--bg-3);
  position:relative;
}
.case-gallery-item img{
  width:100%;aspect-ratio:4/3;object-fit:cover;display:block;
  transition:transform .4s cubic-bezier(.22,.61,.36,1);
}
.case-gallery-item:hover img{transform:scale(1.04)}
.case-gallery-item figcaption{
  font-size:12.5px;color:var(--text-3);
  padding:10px 14px;text-align:left;
  background:rgba(255,255,255,.85);
  position:absolute;left:0;right:0;bottom:0;
  transform:translateY(100%);transition:transform .3s;
}
.case-gallery-item:hover figcaption{transform:translateY(0)}
[data-theme=dark] .case-gallery-item figcaption{background:rgba(15,23,42,.85)}

/* ---------- 亮点（紧凑 2 列）---------- */
.case-highlights{
  list-style:none;padding:0;margin:0;
  display:grid;gap:12px;
  grid-template-columns:repeat(2,1fr);
}
.case-highlights li{
  position:relative;padding:18px 22px 18px 58px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  font-size:14.5px;line-height:1.6;color:var(--text);
  display:flex;align-items:flex-start;gap:0;
  transition:border-color .2s,transform .2s;
}
.case-highlights li:hover{border-color:var(--blue);transform:translateY(-2px)}
.case-highlights li i{
  position:absolute;left:18px;top:16px;
  width:30px;height:30px;border-radius:50%;
  background:linear-gradient(135deg,var(--blue),var(--green));
  color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;font-style:normal;
  box-shadow:0 2px 6px rgba(66,133,244,.25);
}
.case-highlights li:nth-child(4n+2) i{background:linear-gradient(135deg,var(--red),#ff7867)}
.case-highlights li:nth-child(4n+3) i{background:linear-gradient(135deg,var(--yellow),#ffd954);color:#3b2f00}
.case-highlights li:nth-child(4n+4) i{background:linear-gradient(135deg,var(--green),#5cd175);color:#0c2916}
.case-highlights li span{flex:1;align-self:center}

/* ---------- 关键数据（强化品牌色背景）---------- */
.case-stats-block{
  background:linear-gradient(135deg,#e9f2ff 0%,#eaf5ee 100%);
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  padding:36px 32px;
  position:relative;overflow:hidden;
}
.case-stats-block::before{
  content:"";position:absolute;
  top:-80px;right:-80px;width:240px;height:240px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(66,133,244,.22) 0%,transparent 70%);
  pointer-events:none;
}
.case-stats-block .case-block-head{margin-bottom:24px;border-color:rgba(66,133,244,.2)}
.case-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative;z-index:1}
.case-stat{
  background:#fff;border:1px solid rgba(15,23,42,.04);
  border-radius:var(--radius);
  padding:24px 18px;text-align:center;
  box-shadow:0 4px 14px rgba(15,23,42,.06);
  transition:transform .25s,box-shadow .25s;
}
.case-stat:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(15,23,42,.10)}
.case-stat b{
  display:block;font-size:30px;font-weight:700;
  color:var(--blue);line-height:1.1;margin-bottom:6px;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
}
.case-stat:nth-child(2) b{color:var(--red)}
.case-stat:nth-child(3) b{color:var(--yellow-dark)}
.case-stat:nth-child(4) b{color:var(--green)}
.case-stat span{font-size:12.5px;color:var(--text-2);font-weight:500}

/* ---------- 服务标签 ---------- */
.case-services{display:flex;flex-wrap:wrap;gap:10px}
.case-services a{
  font-size:13.5px;font-weight:500;text-decoration:none;
  background:var(--bg-2);color:var(--text);
  padding:9px 18px;border-radius:24px;
  border:1px solid var(--line);
  transition:all .2s cubic-bezier(.22,.61,.36,1);
  display:inline-flex;align-items:center;gap:6px;
}
.case-services a::before{
  content:"→";font-size:11px;color:var(--text-3);
  transition:color .2s;
}
.case-services a:hover{background:var(--blue);color:#fff;border-color:var(--blue);transform:translateY(-1px)}
.case-services a:hover::before{color:#fff}

/* ---------- 标签 ---------- */
.case-tags-lg{margin:36px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.case-tags-lg span{
  font-size:12px;padding:6px 14px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:20px;color:var(--text-2);
}

/* ---------- 上下篇（带缩略图卡片）---------- */
.case-nav{
  border-top:1px solid var(--line);
  margin-top:24px;padding:40px 24px 0;
  max-width:980px;margin-left:auto;margin-right:auto;
  display:grid;grid-template-columns:1fr 1fr;gap:18px;
}
.case-nav-card{
  display:grid;
  grid-template-columns:88px 1fr;
  gap:14px;align-items:center;
  padding:14px;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:#fff;color:var(--text);
  transition:all .25s cubic-bezier(.22,.61,.36,1);
  text-decoration:none;
  position:relative;overflow:hidden;
}
.case-nav-card:hover{
  border-color:var(--blue);
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
}
.case-nav-card.is-empty{grid-template-columns:1fr;padding:18px 22px}
.case-nav-thumb{
  width:88px;height:64px;border-radius:var(--radius);
  background-size:cover;background-position:center;
  background-color:var(--bg-3);
  position:relative;
}
.case-nav-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,0) 50%,rgba(0,0,0,.18) 100%);
  border-radius:inherit;
}
.case-nav-body{display:flex;flex-direction:column;gap:3px;min-width:0}
.case-nav-card.case-nav-next{grid-template-columns:1fr 88px}
.case-nav-card.case-nav-next .case-nav-body{order:-1;text-align:right}
.case-nav-card.case-nav-next .case-nav-thumb{order:1}
.case-nav-label{
  font-size:11px;font-weight:600;
  color:var(--text-3);text-transform:uppercase;
  letter-spacing:.12em;
}
.case-nav-title{
  font-size:15px;font-weight:600;color:var(--text);
  overflow:hidden;text-overflow:ellipsis;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;
}
.case-nav-cat{
  font-size:11px;color:var(--blue);
  font-weight:500;
}

/* loading + error */
.case-loading{padding:80px 24px;text-align:center;color:var(--text-3);font-size:15px}
.case-error{padding:60px 24px;text-align:center;color:var(--red);font-size:15px}

@media (max-width:1024px){
  .cases-grid{grid-template-columns:repeat(2,1fr)}
  .case-meta-grid{grid-template-columns:repeat(2,1fr)}
  .case-stats-grid{grid-template-columns:repeat(2,1fr)}
  .case-highlights{grid-template-columns:1fr}
}
@media (max-width:640px){
  .cases-grid{grid-template-columns:1fr}
  .case-meta-strip{padding:0 16px}
  .case-meta-grid{grid-template-columns:1fr 1fr;gap:10px}
  .case-meta-client{padding:14px 18px}
  .case-meta-client b{font-size:16px}
  .case-meta-badge{margin-left:0}
  .case-meta-strip{margin-top:-48px}
  .case-content{padding:48px 20px 24px}
  .case-block{margin:36px 0}
  .case-h2{font-size:20px}
  .case-nav{grid-template-columns:1fr;padding-top:32px;gap:12px}
  .case-highlights{grid-template-columns:1fr}
  .case-stats-block{padding:28px 22px}
}

/* =============================================================
   响应式增强 - 多设备观看体验
   断点：XL >=1440 / HD 1024-1280 / 平板横 769-1023 /
         平板竖 521-768 / 大手机 380-520 / 小手机 <=380
   ============================================================= */

/* 全局：锁横向滚动，防止任何子元素意外撑爆 */
html,body{overflow-x:hidden}
img,video,svg,canvas{max-width:100%;height:auto}
*{-webkit-tap-highlight-color:transparent}

/* 动态视口高度：移动端地址栏收起/展开时 hero 不再跳动（iOS Safari / Chrome） */
@supports (min-height:100dvh){
  .hero-full{min-height:calc(100dvh - var(--nav-h))}
  .hero-page{min-height:auto}
}
/* 安全区适配：刘海屏 / 挖孔屏 / 底部 Home 指示条 */
@supports (padding:env(safe-area-inset-left)){
  .nav{padding-left:max(24px,env(safe-area-inset-left));padding-right:max(24px,env(safe-area-inset-right))}
  .section,.hero-full,.hero-page{padding-left:max(24px,env(safe-area-inset-left));padding-right:max(24px,env(safe-area-inset-right))}
  .footer{padding-left:max(24px,env(safe-area-inset-left));padding-right:max(24px,env(safe-area-inset-right))}
  .footer-bottom{padding-bottom:max(0px,env(safe-area-inset-bottom))}
}

/* XL 大屏 (>=1440)：放大 hero、限宽容器 */
@media (min-width:1440px){
  .hero-full-title{font-size:clamp(72px,7.6vw,108px)}
  .hero-full-inner{max-width:1180px}
  .hero-full-sub{font-size:clamp(19px,1.7vw,26px)}
  .container{max-width:1280px}
  /* 超宽下导航内容与 container 对齐居中，避免 logo/按钮贴屏幕边缘 */
  .nav{padding-left:calc((100vw - 1280px)/2);padding-right:calc((100vw - 1280px)/2)}
}

/* 2K+ (>=1920)：进一步放大 */
@media (min-width:1920px){
  .hero-full-title{font-size:120px}
  .hero-full-inner{max-width:1320px}
  .container{max-width:1400px}
  .nav{padding-left:calc((100vw - 1400px)/2);padding-right:calc((100vw - 1400px)/2)}
}

/* 超宽屏 (>=2400)：限宽放大，避免两侧留白过多导致内容过于居中孤立 */
@media (min-width:2400px){
  :root{--container:1560px}
  .container{max-width:1560px}
  .hero-full-inner{max-width:1440px}
  .hero-full-title{font-size:132px}
  .hero-full-sub{max-width:900px}
  .nav{padding-left:calc((100vw - 1560px)/2);padding-right:calc((100vw - 1560px)/2)}
}

/* 平板横 (769-1023)：导航紧凑，隐藏右上电话以防挤压 */
@media (max-width:1023px) and (min-width:769px){
  .nav-actions .btn-text{display:none}
  .nav-actions{gap:6px}
}

/* 平板竖 (521-768)：hero 字号过渡、section 紧一些、卡片双列避免过宽 */
@media (max-width:768px) and (min-width:521px){
  .hero-page-title{font-size:clamp(30px,5.6vw,42px)}
  .hero-page{padding:72px 22px 48px}
  .section{padding:60px 22px}
  .section-head{margin-bottom:40px}
  .section-head h2,.section-h2{font-size:28px}
  /* 768 宽下卡片单列会过宽（700px+），改双列更协调 */
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .cases-grid{grid-template-columns:repeat(2,1fr)}
  .twoup{gap:40px}
}

/* 小平板/大手机 (521-640)：案例卡片 2 列每列仅 ~240px 过挤，回退单列
   （须位于上方 521-768 规则之后才能覆盖它） */
@media (max-width:640px){
  .cases-grid{grid-template-columns:1fr}
}

/* 大手机 (380-520)：紧凑布局、压缩字号 */
@media (max-width:520px){
  /* hero 紧凑 */
  .hero-full-title{font-size:clamp(34px,9vw,46px)!important}
  .hero-full{padding:72px 18px 56px;min-height:calc(100vh - 60px)}
  .hero-full-chips{margin-bottom:20px;gap:6px}
  .chip{font-size:11px;padding:4px 9px}
  .hero-full-sub{font-size:15px}
  .hero-full-sub-light{font-size:13px;margin-bottom:28px}
  .hero-full-cta{gap:10px;margin-bottom:36px}
  .btn-filled,.btn-pill{padding:12px 22px;font-size:14px}
  .hero-full-trust{padding:14px 16px;gap:10px 14px;font-size:12px;border-radius:14px}
  /* 内页 hero */
  .hero-page-title{font-size:clamp(24px,7vw,32px)}
  .hero-page{padding:60px 18px 40px}
  .hero-page-sub{font-size:14px}
  /* section */
  .section{padding:56px 18px}
  .container{padding-left:0;padding-right:0}
  /* 标题 */
  .section-head{margin-bottom:36px}
  .section-head h2,.section-h2{font-size:24px}
  .section-head p{font-size:14px}
  /* footer */
  .footer{padding:48px 18px 22px}
  .footer-brand p{font-size:13px}
  .footer-bottom{padding:18px 18px 0;flex-direction:column;align-items:flex-start;gap:10px}
  .footer-bottom span{font-size:12px}
  /* nav 紧凑 */
  .nav{height:60px;padding:0 18px}
  .nav-logo{font-size:15px}
  .nav-logo-mark{width:28px;height:28px}
  /* 双列 grid 全部堆叠 */
  .twoup{grid-template-columns:1fr!important;gap:28px}
  .twoup-img{min-height:340px;padding:24px}
  .twoup-img-mark img{width:140px;height:140px;border-radius:26px;padding:18px}
  .twoup-brand-name{font-size:18px}
  .twoup-text h3{font-size:24px}
  .twoup-bullets{grid-template-columns:repeat(2,1fr)}
  .twoup-img{aspect-ratio:16/11}
  /* stats 紧凑 */
  .stat-card{padding:20px}
  .stat-number{font-size:36px}
  /* case 卡片 */
  .case-body{padding:18px}
  .case-card h3{font-size:17px}
  .case-cover{padding:14px}
}

/* 小手机 (<=380)：极限压缩，logo 仅图标 */
@media (max-width:380px){
  html{font-size:15px}
  .hero-full-title{font-size:32px!important}
  .hero-page-title{font-size:22px}
  .chip{font-size:10px;padding:3px 7px}
  .nav-logo span{display:none}
  .nav-logo-mark{margin-right:0}
  .stat-card{padding:16px}
  .stat-number{font-size:30px}
  .case-card h3{font-size:16px}
  .btn-text{font-size:12px}
  .nav-actions .btn-filled{padding:8px 14px;font-size:12px}
}

/* 触屏设备：禁用 hover 效果避免移动端点击粘滞 */
@media (hover:none){
  .case-card:hover,.stat-card:hover,.service-card:hover{transform:none;box-shadow:var(--shadow-sm);border-color:var(--line)}
  .case-card:hover .case-cover-img{transform:none}
}

/* =============================================================
   横屏 / 矮窗口适配（手机横屏、分屏、小高度窗口）
   场景：手机横屏 844×390、iPad 分屏、桌面小窗口
   问题：hero 用 100vh 计算，矮屏下首屏内容被挤出可视区
   ============================================================= */
@media (max-height:600px) and (orientation:landscape){
  /* hero 取消最小高度，改为随内容自然撑开，避免内容被 overflow 裁切 */
  .hero-full{
    min-height:0;padding:20px 24px 26px;
  }
  .hero-full-chips{margin-bottom:12px}
  .chip{font-size:11px;padding:4px 10px}
  .hero-full-title{font-size:clamp(24px,4.4vw,38px);margin-bottom:10px}
  .hero-full-sub{font-size:15px;margin-bottom:6px;max-width:640px}
  .hero-full-sub-light{font-size:13px;margin-bottom:16px;line-height:1.45}
  .hero-full-cta{margin-bottom:18px;gap:10px}
  .btn-filled,.btn-pill{padding:10px 22px;font-size:14px}
  .hero-full-trust{padding:12px 22px;gap:8px 20px;font-size:12px;border-radius:14px}
  .hero-scroll-hint{display:none}
  /* 内页 hero 压缩 */
  .hero-page{padding:28px 24px 24px}
  .hero-page-title{font-size:clamp(22px,3.6vw,30px)}
  .hero-page-sub{font-size:14px}
  .hero-page-eyebrow{font-size:11px}
  /* CTA 压缩 */
  .cta-wrap{padding:36px 24px}
  .cta{padding:32px 36px}
  .cta h3{font-size:clamp(22px,2.8vw,30px);margin-bottom:10px}
  .cta p{font-size:14px;margin-bottom:18px}
  .cta-pill-white,.cta-pill-ghost{padding:10px 24px;font-size:14px}
  /* section 间距压缩 */
  .section{padding:40px 24px}
  .section-head{margin-bottom:28px}
}

/* =============================================================
   触摸体验 + iOS 表单防缩放
   ============================================================= */
@media (max-width:768px){
  /* iOS Safari：字号 <16px 时聚焦输入框会自动放大页面，统一设 16px 规避 */
  .form-field input,
  .form-field select,
  .form-field textarea{font-size:16px}
  /* 触摸目标 >=44px（Apple HIG / Material 规范） */
  .nav-toggle{width:44px;height:44px}
  .btn-text{min-height:44px;display:inline-flex;align-items:center}
  .btn-filled,.btn-pill{min-height:44px;display:inline-flex;align-items:center;justify-content:center}
  .nav-links a{min-height:44px;display:inline-flex;align-items:center}
  .chip{min-height:32px;display:inline-flex;align-items:center}
  /* 移动端：分类筛选改横向滚动单行，避免 10 个按钮换行占 3-4 行 */
  [data-case-filter]{
    flex-wrap:nowrap !important;
    overflow-x:auto;
    overflow-y:hidden;
    justify-content:flex-start !important;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
    scroll-snap-type:x proximity;
    padding:2px 0 6px;
    margin-bottom:28px !important;
  }
  [data-case-filter]::-webkit-scrollbar{display:none}
  [data-case-filter] .chip{flex:0 0 auto;scroll-snap-align:start;min-height:36px}
  /* 滑动渐隐提示：右侧还有内容时右缘淡出（配合 main.js 的 can-scroll-* class） */
  [data-case-filter].can-scroll-right{
    -webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 36px),transparent 100%);
    mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 36px),transparent 100%);
  }
  [data-case-filter].can-scroll-left{
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 36px,#000 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 36px,#000 100%);
  }
  [data-case-filter].can-scroll-left.can-scroll-right{
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 36px,#000 calc(100% - 36px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 36px,#000 calc(100% - 36px),transparent 100%);
  }
  .cases-filter,.chip-row{-webkit-overflow-scrolling:touch}
}

/* =============================================================
   超窄屏 (<340px)：折叠屏外屏 / 极窄窗口
   ============================================================= */
@media (max-width:340px){
  html{font-size:14px}
  .nav{padding:0 12px}
  .nav-logo span{display:none}
  .section{padding:48px 14px}
  .container{padding-left:0;padding-right:0}
  .hero-full{padding:56px 14px 44px}
  .hero-full-title{font-size:28px}
  .stat-number{font-size:28px}
  .cta{padding:28px 18px}
  .footer{padding:40px 14px 20px}
}

/* 减少动效偏好 */
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* =============================================================
   深色主题：跟随系统 + 手动切换 + localStorage 记忆
   （主题初始化脚本内联在各页 head，避免刷新闪白）
   ============================================================= */
[data-theme="dark"]{
  --bg:#202124;
  --bg-2:#292a2d;
  --bg-3:#35363a;
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.20);
  --text:#e8eaed;
  --text-2:#9aa0a6;
  --text-3:#80868b;
  /* 四色在深色下提亮，保持 Google 品牌识别 */
  --blue:#8ab4f8;
  --blue-dark:#a8c7fa;
  --red:#f28b82;
  --yellow:#fdd663;
  --yellow-dark:#fdd663;
  --green:#81c995;
  --blue-tint:rgba(138,180,248,.14);
  --red-tint:rgba(242,139,130,.14);
  --yellow-tint:rgba(253,214,99,.14);
  --green-tint:rgba(129,201,149,.14);
  --shadow-sm:0 1px 2px rgba(0,0,0,.5);
  --shadow-md:0 4px 16px rgba(0,0,0,.55);
  --shadow-lg:0 8px 28px rgba(0,0,0,.6);
}
/* 硬编码白色的组件在深色下改为表面色（属性选择器提升特异性，可覆盖 contact 页内联样式） */
[data-theme="dark"] .nav{background:rgba(32,33,36,.86)}
[data-theme="dark"] .nav-logo-mark{background:transparent}
[data-theme="dark"] .hero-full{background:linear-gradient(180deg,#202124 0%,#292a2d 70%,#23252a 100%)}
[data-theme="dark"] .hero-page{background:linear-gradient(180deg,#202124 0%,#292a2d 100%)}
[data-theme="dark"] .hero-full-trust,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .twoup-img-mark,
[data-theme="dark"] .service-card,
[data-theme="dark"] .case-card,
[data-theme="dark"] .case-meta-card,
[data-theme="dark"] .footer,
[data-theme="dark"] .back-to-top,
[data-theme="dark"] .contact-card,
[data-theme="dark"] .form-card{background:var(--bg-2)}
[data-theme="dark"] .nav-links{background:var(--bg-2)}
[data-theme="dark"] .form-field input,
[data-theme="dark"] .form-field select,
[data-theme="dark"] .form-field textarea{
  background:var(--bg-3);color:var(--text);border-color:var(--line-2);
}
[data-theme="dark"] .form-field input::placeholder,
[data-theme="dark"] .form-field textarea::placeholder{color:var(--text-3)}
/* 主色实心按钮：深色下文字转深色，保证 4.5:1 对比度 */
[data-theme="dark"] .btn-filled,
[data-theme="dark"] .btn-pill,
[data-theme="dark"] .form-submit{color:#202124}
[data-theme="dark"] .btn-filled:hover,
[data-theme="dark"] .btn-pill:hover,
[data-theme="dark"] .form-submit:hover{color:#202124}
/* 案例封面文字在深色下保持可读（封面是彩色渐变，不受影响） */
[data-theme="dark"] .sk{background:var(--bg-3)}
[data-theme="dark"] .sk::after{
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.06),transparent);
}
/* 案例搜索 */
.case-search{position:relative;max-width:460px;margin:0 auto 20px}
.case-search-icon{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  color:var(--text-3);pointer-events:none;
}
.case-search-input{
  width:100%;padding:12px 44px;
  border:1px solid var(--line-2);border-radius:24px;
  font-family:inherit;font-size:15px;color:var(--text);
  background:var(--bg);outline:none;
  transition:border-color .2s,box-shadow .2s;
}
.case-search-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-tint)}
.case-search-input::placeholder{color:var(--text-3)}
.case-search-input::-webkit-search-cancel-button,
.case-search-input::-webkit-search-decoration{display:none;-webkit-appearance:none}
.case-search-clear{
  position:absolute;right:10px;top:50%;transform:translateY(-50%);
  width:28px;height:28px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-3);transition:background .2s,color .2s;
}
.case-search-clear:hover{background:var(--bg-3);color:var(--text)}
.case-search-clear:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
@media (max-width:768px){
  /* iOS Safari 聚焦输入框时字号 <16px 会自动放大页面 */
  .case-search-input{font-size:16px}
}

/* =============================================================
   可访问性：skip link / 键盘焦点环
   ============================================================= */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:10001;
  background:var(--blue);color:#fff;
  padding:10px 18px;border-radius:0 0 10px 0;
  font-size:14px;font-weight:500;
}
.skip-link:focus{left:0}
a:focus-visible,button:focus-visible,
input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--blue);outline-offset:2px;
}
.case-nav a:focus-visible,.footer a:focus-visible{outline-offset:3px;border-radius:4px}

/* 案例封面占位（无图时）：弱化大字母 + 右下品牌角标，保持体面 */
.case-cover-brand{
  position:absolute;right:16px;bottom:14px;z-index:2;
  font-size:12px;font-weight:500;letter-spacing:.02em;
  color:rgba(255,255,255,.78);
}

/* 深色下导航切换按钮 */
.theme-toggle{
  width:36px;height:36px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-2);background:transparent;
  transition:background .2s,color .2s;
  flex-shrink:0;
}
.theme-toggle:hover{background:var(--bg-3);color:var(--text)}
.theme-toggle:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
@media (max-width:768px){.theme-toggle{width:44px;height:44px}}

/* =============================================================
   交互增强：滚动进度条 / 回到顶部 / 滚动揭示 / 移动端菜单过渡
   ============================================================= */

/* 顶部滚动进度条（置于 sticky 导航之上） */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:10000;
  background:linear-gradient(90deg,var(--blue) 0%,var(--green) 50%,var(--yellow) 100%);
  transform:scaleX(0);transform-origin:0 50%;
  will-change:transform;pointer-events:none;
}
.no-motion .scroll-progress{display:none}

/* 回到顶部（44px 触摸目标 + 安全区避让） */
.back-to-top{
  position:fixed;z-index:9998;
  right:max(24px,env(safe-area-inset-right));
  bottom:max(24px,env(safe-area-inset-bottom));
  width:44px;height:44px;border-radius:50%;
  background:#fff;color:var(--text-2);
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s,background .2s,color .2s,border-color .2s;
}
.back-to-top.is-show{opacity:1;visibility:visible;transform:none}
.back-to-top:hover{background:var(--blue);color:#fff;border-color:var(--blue);box-shadow:0 4px 14px rgba(66,133,244,.32)}
.back-to-top:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
@media (max-width:520px){
  .back-to-top{
    right:max(16px,env(safe-area-inset-right));
    bottom:max(16px,env(safe-area-inset-bottom));
    width:42px;height:42px;
  }
}

/* 滚动揭示：JS 加 .reveal 隐藏、进入视口加 .is-in 淡入上移 */
.reveal{opacity:0;transform:translateY(14px)}
.reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .58s cubic-bezier(.22,.61,.36,1),transform .58s cubic-bezier(.22,.61,.36,1);
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  .reveal.is-in{transition:none}
}

/* 骨架屏：案例列表加载中占位 */
.skeleton-card{pointer-events:none}
.sk{
  position:relative;overflow:hidden;
  background:var(--bg-3);border-radius:6px;
}
.sk::after{
  content:"";position:absolute;inset:0;
  transform:translateX(-100%);
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
  animation:sk-shimmer 1.4s ease-in-out infinite;
}
@keyframes sk-shimmer{100%{transform:translateX(100%)}}
.sk-cover{aspect-ratio:16/10;border-radius:0}
.sk-line{height:12px;margin-bottom:11px}
@media (prefers-reduced-motion:reduce){
  .sk::after{animation:none}
}

/* 案例卡片错峰入场，让列表渲染更有节奏 */
.cases-grid .case-card.reveal.is-in:nth-child(2){transition-delay:.05s}
.cases-grid .case-card.reveal.is-in:nth-child(3){transition-delay:.10s}
.cases-grid .case-card.reveal.is-in:nth-child(4){transition-delay:.15s}
.cases-grid .case-card.reveal.is-in:nth-child(n+5){transition-delay:.20s}

/* 移动端菜单：改为高度过渡（原来是 display 瞬间切换） */
@media (max-width:768px){
  .nav-links{
    display:flex;
    max-height:0;opacity:0;overflow:hidden;
    padding-top:0;padding-bottom:0;
    transition:max-height .3s cubic-bezier(.22,.61,.36,1),
               opacity .22s ease,
               padding .3s cubic-bezier(.22,.61,.36,1);
  }
  .nav-links.is-open{
    max-height:calc(70vh);opacity:1;
    padding:12px 24px 16px;
  }
}
@media (prefers-reduced-motion:reduce){
  .nav-links{transition:none}
}

/* =========================================================
   内容板块（全部由后台「内容管理」维护）
   服务清单 / 服务方式 / 发展历程 / 核心价值观 / 加入我们
   ========================================================= */

/* ---------- 业务卡：服务清单 ---------- */
.service-items{
  list-style:none;margin:0;padding:14px 0 0;
  border-top:1px dashed var(--line-2);
  display:flex;flex-direction:column;gap:7px;
}
.service-items li{
  position:relative;padding-left:16px;
  font-size:13px;color:var(--text-2);line-height:1.55;
}
.service-items li::before{
  content:"";position:absolute;left:0;top:8px;
  width:6px;height:6px;border-radius:50%;
  background:var(--blue);
}
.services-grid .service-card:nth-child(4n+2) .service-items li::before{background:var(--red)}
.services-grid .service-card:nth-child(4n+3) .service-items li::before{background:var(--yellow-dark)}
.services-grid .service-card:nth-child(4n+4) .service-items li::before{background:var(--green)}

/* ---------- 我们的服务方式 ---------- */
.approach-grid{
  display:grid;gap:20px;grid-template-columns:repeat(2,1fr);
  max-width:1000px;margin:0 auto;
}
.approach-card{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:34px 32px;
}
.approach-num{
  display:block;font-size:40px;font-weight:700;
  line-height:1;margin-bottom:16px;letter-spacing:-.02em;
}
.accent-blue{color:var(--blue)}
.accent-red{color:var(--red)}
.accent-yellow{color:var(--yellow-dark)}
.accent-green{color:var(--green)}
.approach-card p{font-size:15px;color:var(--text-2);line-height:1.85}

/* ---------- 发展历程 ---------- */
.timeline{
  max-width:760px;margin:0 auto;
  display:flex;flex-direction:column;gap:20px;
}
.tl-item{
  display:grid;grid-template-columns:112px 1fr;gap:24px;align-items:start;
  padding:24px 28px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-lg);
}
.tl-year{font-size:32px;font-weight:700;line-height:1.15;letter-spacing:-.02em}
.c-blue{color:var(--blue)}
.c-red{color:var(--red)}
.c-yellow{color:var(--yellow-dark)}
.c-green{color:var(--green)}
.tl-item h4{font-size:18px;font-weight:700;margin-bottom:6px}
.tl-item p{font-size:14px;color:var(--text-2);line-height:1.65}

/* ---------- 核心价值观 ---------- */
.values-grid{display:grid;gap:20px;grid-template-columns:repeat(3,1fr)}
.value-card{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 24px;
  transition:box-shadow .25s,transform .25s;
}
.value-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.value-icon{
  width:44px;height:44px;border-radius:12px;background:var(--bg-3);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:700;margin-bottom:14px;
}
.value-card h4{font-size:17px;font-weight:700;margin-bottom:8px}
.value-card p{font-size:14px;color:var(--text-2);line-height:1.6}

/* ---------- 加入我们 ---------- */
.join-card{
  max-width:760px;margin:0 auto;text-align:center;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-xl);padding:48px 32px;
}
.join-card h2{font-size:28px;font-weight:700;margin:12px 0 14px;letter-spacing:-.01em}
.join-card p{font-size:15px;color:var(--text-2);line-height:1.75;margin-bottom:24px}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .approach-grid{grid-template-columns:1fr}
  .values-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .values-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:1fr;gap:10px;padding:20px 22px}
  .tl-year{font-size:26px}
  .join-card{padding:36px 20px;border-radius:var(--radius-lg)}
  .approach-card{padding:26px 22px}
}
@media (prefers-reduced-motion:reduce){
  .value-card{transition:none}
  .value-card:hover{transform:none}
}

/* ---------- 深色模式 ---------- */
[data-theme="dark"] .approach-card,
[data-theme="dark"] .tl-item,
[data-theme="dark"] .value-card,
[data-theme="dark"] .join-card{background:var(--bg-2)}

/* 业务卡圆形图标背景（此前缺失定义，图标一直透明不可见） */
.icon-blue{background:var(--blue)}
.icon-red{background:var(--red)}
.icon-yellow{background:var(--yellow-dark)}
.icon-green{background:var(--green)}

/* =========================================================
   案例板块重做：工具条 / 卡片信息 / 详情页 / 灯箱
   ========================================================= */

/* ---------- 列表工具条 ---------- */
.case-toolbar{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  justify-content:space-between;margin-bottom:22px;
}
.case-search{position:relative;flex:1 1 320px;max-width:460px;margin:0}
.case-toolbar-right{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.case-sort-wrap{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2)}
.case-sort{
  font-family:inherit;font-size:14px;color:var(--text);background:var(--bg);
  border:1px solid var(--line-2);border-radius:20px;padding:8px 14px;cursor:pointer;
  min-height:36px;
}
.case-sort:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.case-count{font-size:13px;color:var(--text-3);white-space:nowrap}

/* ---------- 卡片增强 ---------- */
.case-card{position:relative}
.case-badge{
  position:absolute;top:12px;right:12px;z-index:3;
  font-size:11px;font-weight:600;letter-spacing:.04em;
  background:var(--yellow);color:#3b2f00;
  padding:4px 10px;border-radius:12px;
  box-shadow:0 2px 8px rgba(0,0,0,.18);
}
.case-sub{font-size:13px;color:var(--text-3);margin:-4px 0 8px}
.case-sum{font-size:14px;color:var(--text-2);line-height:1.6;flex:1;margin-bottom:12px}
.case-stats{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:12px}
.case-stats span{display:flex;flex-direction:column;font-size:11px;color:var(--text-3)}
.case-stats b{font-size:16px;font-weight:700;color:var(--text);line-height:1.2}
.case-foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
}
.case-foot .case-tags{margin:0}
.case-date{font-size:12px;color:var(--text-3);white-space:nowrap}
.case-cover.cover-failed{background:linear-gradient(135deg,#4285F4 0%,#34A853 100%)}

/* 空状态 */
.case-empty{padding:72px 24px;text-align:center;grid-column:1/-1}
.case-empty-icon{font-size:40px;opacity:.5;margin-bottom:14px}
.case-empty p{font-size:16px;color:var(--text);margin-bottom:6px}
.case-empty-sub{font-size:14px;color:var(--text-3);margin-bottom:20px}

/* ---------- 详情页 ---------- */
.crumbs{
  display:flex;align-items:center;justify-content:center;gap:8px;
  font-size:13px;opacity:.85;margin-bottom:18px;
}
.crumbs a{color:inherit;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.4)}
.crumbs a:hover{border-bottom-color:#fff}
.case-hero.has-cover{background-size:cover;background-position:center}
.case-hero.has-cover::after{background:linear-gradient(180deg,rgba(0,0,0,.15) 0%,rgba(0,0,0,.62) 100%)}
.case-hero-sub{font-size:18px;opacity:.9;margin-bottom:18px}
.case-hero-badges{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;font-size:13px}
.case-hero-badges span{
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);
  padding:6px 14px;border-radius:20px;backdrop-filter:blur(4px);
}
/* 灯箱以下开始，已用新版（704~ 区间）替代 — 旧 .case-lead / case-block / case-h2 等重复定义已删除 */

/* ---------- 灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:20000;background:rgba(0,0,0,.92);
  display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity .2s ease;padding:24px;
}
.lightbox.is-open{opacity:1}
.lb-stage{max-width:min(92vw,1200px);max-height:86vh;display:flex;flex-direction:column;align-items:center;gap:12px}
.lb-stage img{max-width:100%;max-height:78vh;object-fit:contain;border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lb-cap{font-size:14px;color:rgba(255,255,255,.82);text-align:center}
.lb-close,.lb-prev,.lb-next{
  position:absolute;background:rgba(255,255,255,.14);border:0;color:#fff;
  width:46px;height:46px;border-radius:50%;font-size:22px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .2s;
}
.lb-close:hover,.lb-prev:hover,.lb-next:hover{background:rgba(255,255,255,.28)}
.lb-close{top:20px;right:22px;font-size:18px}
.lb-prev{left:22px;top:50%;transform:translateY(-50%)}
.lb-next{right:22px;top:50%;transform:translateY(-50%)}
.lb-count{
  position:absolute;bottom:22px;left:50%;transform:translateX(-50%);
  font-size:13px;color:rgba(255,255,255,.7);
}
body.lb-open{overflow:hidden}

/* ---------- 响应式 ---------- */
@media (max-width:768px){
  .case-toolbar{flex-direction:column;align-items:stretch}
  .case-search{max-width:none}
  .case-toolbar-right{justify-content:space-between}
  .case-gallery{grid-template-columns:1fr}
  .crumbs{font-size:12px}
  .lb-prev,.lb-next{width:40px;height:40px}
  .lb-prev{left:8px}.lb-next{right:8px}
}
@media (prefers-reduced-motion:reduce){
  .case-gallery-item img{transition:none}
  .case-gallery-item:hover img{transform:none}
  .lightbox{transition:none}
}

/* ---------- 深色模式（详情页新结构）---------- */
[data-theme="dark"] .case-stats-block{
  background:linear-gradient(135deg,rgba(66,133,244,.08) 0%,rgba(52,168,83,.06) 100%);
  border-color:rgba(255,255,255,.06);
}
[data-theme="dark"] .case-stat{
  background:var(--bg-2);
  border-color:rgba(255,255,255,.06);
  box-shadow:none;
}
[data-theme="dark"] .case-meta-client,
[data-theme="dark"] .case-meta-item,
[data-theme="dark"] .case-nav-card{background:var(--bg-2);border-color:rgba(255,255,255,.06)}
[data-theme="dark"] .case-tags-lg span{background:var(--bg-3);border-color:rgba(255,255,255,.06)}
[data-theme="dark"] .case-summary-text::before,
[data-theme="dark"] .case-summary-text::after{color:rgba(66,133,244,.35)}
[data-theme="dark"] .case-services a{background:var(--bg-3);color:var(--text);border-color:rgba(255,255,255,.06)}
[data-theme="dark"] .case-sort{background:var(--bg-2)}
[data-theme="dark"] .case-badge{color:#3b2f00}


/* ---------- 404 页 ---------- */
.nf-wrap{
  min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:96px 24px;gap:6px;
}
.nf-code{
  font-size:clamp(88px,16vw,160px);font-weight:700;line-height:1;letter-spacing:-.03em;
  background:linear-gradient(135deg,var(--blue),var(--green) 55%,var(--yellow));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin:26px 0 6px;
}
.nf-title{font-size:clamp(22px,3.4vw,32px);font-weight:700;letter-spacing:-.01em}
.nf-sub{font-size:15px;color:var(--text-2);max-width:460px;line-height:1.7;margin-bottom:28px}
.nf-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}

/* ============================================================
   案例详情 · 块堆叠（b-*）
   ============================================================ */

/* 通用块容器：继承原 .case-block 间距 */
.case-content .b-paragraph,
.case-content .b-heading,
.case-content .b-quote,
.case-content .b-image,
.case-content .b-gallery,
.case-content .b-twocol,
.case-content .b-callout,
.case-content .b-stats,
.case-content .b-divider{margin:36px 0}

/* 段落：行高更松 */
.b-paragraph{font-size:16px;line-height:1.85;color:var(--text-2)}
.b-paragraph strong{color:var(--text);font-weight:600}

/* heading */
.b-heading{
  font-family:var(--font-display,inherit);
  font-size:clamp(22px,2.8vw,30px);font-weight:700;letter-spacing:-.01em;
  color:var(--text);margin:48px 0 18px;line-height:1.3;
  display:flex;align-items:center;gap:14px;
}
.b-heading::before{
  content:"";flex:0 0 28px;height:3px;border-radius:2px;
  background:linear-gradient(90deg,var(--blue),var(--green));
}
h3.b-heading{font-size:clamp(18px,2.2vw,22px);margin:32px 0 12px}
h3.b-heading::before{flex-basis:20px;height:2px}

/* 引言 */
.b-quote{
  margin:40px 0;padding:0;
  position:relative;
}
.b-quote blockquote{
  margin:0;padding:30px 36px;border-left:4px solid var(--blue);
  background:linear-gradient(180deg,var(--blue-tint),transparent 70%);
  border-radius:0 18px 18px 0;
  font-size:clamp(17px,2vw,21px);font-weight:500;line-height:1.7;color:var(--text);
  font-style:italic;
}
.b-quote figcaption{
  margin-top:14px;padding-left:40px;font-size:13px;color:var(--text-3);
}

/* 单图：默认 full-width，可通过 data-w 切换 */
.b-image{margin:48px auto;text-align:center}
.b-image img{
  display:block;width:100%;height:auto;border-radius:18px;
  box-shadow:0 12px 36px -16px rgba(0,0,0,.18);
}
.b-image[data-w="wide"]{max-width:1080px}
.b-image[data-w="normal"]{max-width:780px}
.b-image[data-w="full"]{max-width:100%}
.b-image figcaption{
  margin-top:14px;font-size:13px;color:var(--text-3);font-style:italic;
}

/* 图集 */
.b-gallery{display:grid;gap:12px;margin:40px 0}
.b-gallery[data-layout="grid"]{grid-template-columns:repeat(3,1fr)}
.b-gallery[data-layout="grid4"]{grid-template-columns:repeat(4,1fr)}
.b-gallery[data-layout="masonry"]{grid-template-columns:repeat(3,1fr);grid-auto-rows:160px;grid-auto-flow:dense}
.b-gallery[data-layout="masonry"] .b-gal-item:nth-child(3n+1){grid-row:span 2}
.b-gallery[data-layout="carousel"]{
  display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:12px;
  padding-bottom:6px;scrollbar-width:thin;
}
.b-gallery[data-layout="carousel"] .b-gal-item{flex:0 0 78%;scroll-snap-align:start}
.b-gal-item{
  margin:0;border-radius:14px;overflow:hidden;background:var(--bg-2);
  border:1px solid var(--border,rgba(0,0,0,.06));
  cursor:zoom-in;transition:transform .25s ease;
}
.b-gal-item:hover{transform:translateY(-2px)}
.b-gal-item img{display:block;width:100%;height:220px;object-fit:cover}
.b-gallery[data-layout="masonry"] .b-gal-item img{height:100%}
.b-gallery[data-layout="carousel"] .b-gal-item img{height:340px}
.b-gal-item figcaption{
  padding:8px 12px;font-size:12px;color:var(--text-3);
  background:rgba(255,255,255,.96);
}

/* 图文双栏 */
.b-twocol{display:grid;gap:32px;align-items:start;margin:48px 0}
.b-twocol[data-ratio="1:1"]{grid-template-columns:1fr 1fr}
.b-twocol[data-ratio="2:3"]{grid-template-columns:2fr 3fr}
.b-twocol[data-ratio="3:2"]{grid-template-columns:3fr 2fr}
.b-twocol[data-ratio="1:2"]{grid-template-columns:1fr 2fr}
.b-twocol[data-ratio="2:1"]{grid-template-columns:2fr 1fr}
.b-twocol-cell{font-size:15px;line-height:1.8;color:var(--text-2)}
.b-twocol-cell img{display:block;width:100%;border-radius:14px;margin:0 0 14px}
.b-twocol-cell p{margin:0 0 12px}
.b-twocol-cell strong{color:var(--text);font-weight:600}

/* callout */
.b-callout{
  display:flex;gap:18px;align-items:flex-start;
  padding:24px 26px;border-radius:16px;margin:40px 0;
  border:1px solid;border-left-width:4px;
  background:var(--bg-2);
}
.b-callout[data-color="blue"]{border-color:rgba(66,133,244,.3);border-left-color:var(--blue);background:linear-gradient(180deg,var(--blue-tint),var(--bg-2) 80%)}
.b-callout[data-color="red"]{border-color:rgba(234,67,53,.3);border-left-color:var(--red);background:linear-gradient(180deg,rgba(234,67,53,.07),var(--bg-2) 80%)}
.b-callout[data-color="yellow"]{border-color:rgba(251,188,4,.3);border-left-color:var(--yellow);background:linear-gradient(180deg,rgba(251,188,4,.07),var(--bg-2) 80%)}
.b-callout[data-color="green"]{border-color:rgba(52,168,83,.3);border-left-color:var(--green);background:linear-gradient(180deg,rgba(52,168,83,.07),var(--bg-2) 80%)}
.b-callout-icon{
  flex:0 0 38px;height:38px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;font-size:18px;
  background:var(--bg-3);
}
.b-callout-body{flex:1;min-width:0}
.b-callout-title{font-size:16px;font-weight:600;color:var(--text);margin-bottom:6px}
.b-callout-text{font-size:14px;line-height:1.7;color:var(--text-2)}
.b-callout-text strong{color:var(--text);font-weight:600}

/* stats */
.b-stats{display:grid;gap:18px;margin:40px 0}
.b-stats[data-cols="2"]{grid-template-columns:repeat(2,1fr)}
.b-stats[data-cols="3"]{grid-template-columns:repeat(3,1fr)}
.b-stats[data-cols="4"]{grid-template-columns:repeat(4,1fr)}
.b-stat{
  padding:24px 22px;border-radius:14px;
  background:linear-gradient(135deg,var(--blue-tint),var(--bg-2));
  border:1px solid var(--border,rgba(0,0,0,.06));
  text-align:left;
}
.b-stat b{
  display:block;font-family:var(--font-display,inherit);
  font-size:clamp(26px,3.2vw,34px);font-weight:700;line-height:1.1;
  background:linear-gradient(135deg,var(--blue),var(--green));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:6px;letter-spacing:-.01em;
}
.b-stat span{font-size:13px;color:var(--text-3)}

/* divider */
.b-divider{margin:48px auto;text-align:center;max-width:160px}
.b-divider[data-style="line"]::before{
  content:"";display:block;height:1px;background:linear-gradient(90deg,transparent,var(--border,rgba(0,0,0,.2)),transparent);
}
.b-divider[data-style="dots"]::before{
  content:"• • •";color:var(--text-3);letter-spacing:.6em;font-size:14px;
}
.b-divider[data-style="space"]{height:24px}

/* 块级样式控制 */
.case-content .case-block[data-b-align="center"]{text-align:center}
.case-content .case-block[data-b-align="center"] .b-quote,
.case-content .case-block[data-b-align="center"] .b-callout,
.case-content .case-block[data-b-align="center"] .b-image{text-align:center}

.case-content .case-block[data-b-width="narrow"]{max-width:720px;margin-left:auto;margin-right:auto}
.case-content .case-block[data-b-width="wide"]{max-width:1080px;margin-left:auto;margin-right:auto}
.case-content .case-block[data-b-width="normal"]{max-width:880px;margin-left:auto;margin-right:auto}

.case-content .case-block[data-b-bg="gray"]{
  background:var(--bg-2);border-radius:18px;padding:36px 32px;margin:40px -16px;
}
.case-content .case-block[data-b-bg="accent"]{
  background:linear-gradient(135deg,var(--blue-tint),transparent 70%);border-radius:18px;padding:36px 32px;margin:40px -16px;
}

.case-content .case-block[data-b-gap="tight"]{margin-top:18px;margin-bottom:18px}
.case-content .case-block[data-b-gap="loose"]{margin-top:60px;margin-bottom:60px}

/* 暗色模式调整 */
[data-theme="dark"] .b-stat{background:linear-gradient(135deg,rgba(66,133,244,.1),var(--bg-2))}
[data-theme="dark"] .b-quote blockquote{background:linear-gradient(180deg,rgba(66,133,244,.12),transparent 70%)}
[data-theme="dark"] .b-gallery .b-gal-item{background:var(--bg-2);border-color:rgba(255,255,255,.06)}
[data-theme="dark"] .b-gal-item figcaption{background:rgba(15,23,42,.92);color:var(--text-2)}

/* 移动端 */
@media (max-width:780px){
  .b-gallery[data-layout="grid"],
  .b-gallery[data-layout="grid4"]{grid-template-columns:repeat(2,1fr)}
  .b-gallery[data-layout="masonry"]{grid-template-columns:repeat(2,1fr);grid-auto-rows:140px}
  .b-gallery[data-layout="carousel"] .b-gal-item{flex-basis:88%}
  .b-gallery[data-layout="carousel"] .b-gal-item img{height:240px}
  .b-twocol,
  .b-twocol[data-ratio="2:3"],
  .b-twocol[data-ratio="3:2"],
  .b-twocol[data-ratio="1:2"],
  .b-twocol[data-ratio="2:1"]{grid-template-columns:1fr;gap:18px}
  .b-stats[data-cols="2"],
  .b-stats[data-cols="3"],
  .b-stats[data-cols="4"]{grid-template-columns:repeat(2,1fr)}
  .case-content .case-block[data-b-bg="gray"],
  .case-content .case-block[data-b-bg="accent"]{margin-left:0;margin-right:0;padding:24px 20px;border-radius:14px}
  .b-image[data-w="wide"]{max-width:100%}
  .b-image[data-w="normal"]{max-width:100%}
}
@media (max-width:480px){
  .b-gallery[data-layout="grid"],
  .b-gallery[data-layout="grid4"]{grid-template-columns:1fr}
  .b-quote blockquote{padding:22px 20px;font-size:16px;border-radius:0 14px 14px 0}
}