:root{
  --navy:#0d2b4d;        /* 深蓝主品牌色（Hero/页脚/标题） */
  --navy-2:#0f3a63;      /* 深蓝渐变辅助 */
  --blue:#1b6ec2;        /* 辅助蓝（icon/渐变） */
  --cyan:#4dd0e6;        /* 青蓝：数字、强调、电路色 */
  --cyan-ink:#0e9fb8;    /* 深青蓝：hover/聚焦文字，保证对比度 */
  --accent:#f5b041;      /* 橙金：CTA 按钮主色 */
  --accent-2:#f28c28;    /* 橙金高亮渐变 */
  --ink:#0f1b2d;
  --muted:#5b6b82;
  --bg:#f5f7fb;
  --card:#ffffff;
  --line:#e4e9f2;
  --radius:16px;
  --shadow:0 12px 32px rgba(13,43,77,.08);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
}
a{color:inherit;text-decoration:none}
.container{width:min(1120px,92vw);margin:0 auto}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--navy)}
.brand-logo{height:40px;width:auto;border-radius:12px;object-fit:cover;display:block;
  box-shadow:0 4px 12px rgba(13,43,77,.18)}
.brand-text strong{font-size:18px;display:block;line-height:1.1}
.brand-text em{font-size:11px;color:var(--muted);font-style:normal;letter-spacing:1px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-size:15px;color:var(--ink);font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--cyan-ink)}
.nav-links a.active{color:var(--accent);font-weight:700}
.nav-cta{color:#fff!important;background:var(--accent);padding:9px 18px;border-radius:999px}
.nav-cta:hover{background:var(--accent-2)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px}

.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-weight:600;cursor:pointer;border:0;transition:transform .15s,box-shadow .2s;font-size:15px}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(242,140,40,.35)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-outline{background:transparent;color:var(--navy);border:1px solid rgba(13,43,77,.25)}
.btn-outline:hover{background:var(--navy);color:#fff}
.card-link{display:inline-block;margin-top:16px;color:var(--accent-2);font-weight:700;font-size:15px;transition:color .2s}
.card-link:hover{color:var(--accent)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 60%,#0a1f3a 100%);color:#fff}
.hero-bg{position:absolute;inset:0}
.grid-overlay{position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:42px 42px;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%)}
.glow{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5}
.glow-1{width:420px;height:420px;background:var(--accent-2);top:-120px;right:-60px}
.glow-2{width:360px;height:360px;background:var(--cyan);bottom:-140px;left:-80px;opacity:.35}
.hero-inner{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:40px;padding:90px 0 100px;max-width:900px}
.hero-copy .eyebrow{display:inline-block;padding:8px 14px;border:1px solid rgba(255,255,255,.25);
  border-radius:999px;font-size:13px;color:var(--cyan);margin-bottom:22px}
.hero-copy h1{font-size:clamp(18px,4.5vw,52px);line-height:1.25;margin-bottom:8px;font-weight:800}
.h1-line2{font-size:clamp(18px,4.5vw,52px);font-weight:800;line-height:1.25;color:var(--accent);margin-bottom:20px;white-space:nowrap}
.subtitle{font-size:17px;color:#c7d4e8;max-width:560px;margin-bottom:30px}
.subtitle-en{font-size:13px;color:rgba(200,215,232,.7);max-width:560px;margin-top:-18px;margin-bottom:22px;font-style:italic}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap}
.badge{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  padding:7px 14px;border-radius:999px;font-size:13px;color:#dbe6f5}

/* ---------- Global responsive headings ---------- */
h1{font-size:clamp(22px,4vw,38px);font-weight:800;line-height:1.2}
h2{font-size:clamp(18px,3vw,32px);font-weight:700;line-height:1.3}
h3{font-size:clamp(14px,2.2vw,20px);font-weight:700;line-height:1.4}
@media(max-width:600px){
  h1{font-size:clamp(18px,6vw,24px)}
  h2{font-size:clamp(16px,5vw,22px)}
  h3{font-size:clamp(13px,4.5vw,17px)}
}

/* orb-card and hero-visual removed */

/* ---------- Stats ---------- */
.stats{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:34px 0;
  border-top:1px solid rgba(77,208,230,.15);border-bottom:1px solid rgba(77,208,230,.15)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat{position:relative}
.stat:not(:last-child)::after{content:"";position:absolute;right:-10px;top:50%;transform:translateY(-50%);
  width:1px;height:40px;background:rgba(77,208,230,.25)}
.stat b{font-size:clamp(28px,4vw,42px);font-weight:800;color:var(--cyan);display:block}
.stat span{font-size:14px;color:#b9cdd6}

/* ---------- Sections ---------- */
.section{padding:84px 0}
.section-alt{background:#eef2f8}
.section-head{max-width:680px;margin:0 auto 48px;text-align:center}
.kicker{display:inline-block;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:2px;margin-bottom:12px;
  padding:5px 14px;background:rgba(242,140,40,.1);border-radius:999px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);color:var(--navy);margin-bottom:14px;position:relative;display:block}
#partners .section-head h2{white-space:nowrap}
.section-head h2::after{content:"";display:block;width:50px;height:3px;background:linear-gradient(90deg,var(--blue),var(--cyan));
  border-radius:2px;margin:12px auto 0}
.section-head p{color:var(--muted);font-size:16px}

.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-6px);box-shadow:0 20px 44px rgba(11,31,58,.14)}
.card-icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--blue),var(--cyan));
  display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}
.card h3{font-size:22px;color:var(--navy);margin-bottom:12px}
.card p{color:var(--muted);margin-bottom:16px}
.card ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.card li{position:relative;padding-left:22px;color:var(--ink);font-size:15px}
.card li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;
  border-radius:50%;background:var(--cyan)}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.about-copy h2{font-size:clamp(24px,3vw,34px);color:var(--navy);margin:14px 0 18px}
.about-copy p{color:var(--muted);margin-bottom:14px}
.about-copy strong{color:var(--accent)}
.about-points{display:flex;flex-direction:column;gap:16px;margin-top:22px}
.point{display:flex;gap:14px;align-items:flex-start}
.point span{font-size:30px}
.point h4{color:var(--navy);font-size:17px}
.point p{margin:0;font-size:14px}
.about-visual{display:flex;justify-content:center}
.map-card{width:100%;max-width:380px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:36px;box-shadow:var(--shadow);text-align:center}
.map-dot{padding:18px;border-radius:14px;font-weight:700;color:#fff}
.dot-cn{background:linear-gradient(135deg,#c8102e,#e23b4e)}
.dot-th{background:linear-gradient(135deg,var(--blue),var(--cyan))}
.map-line{height:46px;width:2px;background:linear-gradient(var(--blue),var(--cyan));margin:0 auto}

/* ---------- Partners ---------- */
.partners-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.partner-logo{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 22px;text-align:center;transition:transform .2s,border-color .2s}
.partner-logo:hover{transform:translateY(-4px);border-color:var(--accent)}
.pl-name{font-size:22px;font-weight:800;color:var(--navy);letter-spacing:1px}
.pl-sub{font-size:13px;color:var(--muted);margin-top:8px}

/* ---------- Advantage ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.adv-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.adv{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;position:relative;overflow:hidden}
.adv::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--blue),var(--cyan))}
.adv-num{font-size:34px;font-weight:800;color:#d7e2f1;margin-bottom:8px}
.adv h4{color:var(--navy);font-size:19px;margin-bottom:8px}
.adv p{color:var(--muted);font-size:15px}

/* WHY US 专区独立卡片（大号 icon，突出品牌感） */
.whyus-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 28px;box-shadow:var(--shadow);transition:box-shadow .25s,transform .25s}
.whyus-card:hover{box-shadow:0 16px 40px rgba(13,43,77,.14);transform:translateY(-4px)}
.whyus-icon{width:60px;height:60px;border-radius:14px;background:linear-gradient(135deg,var(--blue),var(--cyan));
  display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:18px}
.whyus-card h3{font-size:20px;color:var(--navy);margin-bottom:12px;font-weight:700}
.whyus-card p{color:var(--muted);font-size:15px;line-height:1.7}
.whyus-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.whyus-tag{background:rgba(77,208,230,.1);color:var(--cyan-ink);font-size:12px;font-weight:600;
  padding:5px 12px;border-radius:999px}

/* 区块顶部分隔线（蓝色细线，视觉分隔作用） */
.section-divider{width:60px;height:3px;background:linear-gradient(90deg,var(--blue),var(--cyan));
  border-radius:2px;margin:0 auto 20px}

/* ---------- Contact ---------- */
.contact{background:rgba(255,255,255,.6)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.contact-copy h2{font-size:clamp(26px,3.2vw,36px);color:var(--navy);margin:12px 0 18px}
.contact-copy .kicker{margin-bottom:0}
.contact-copy p{color:var(--muted);margin-bottom:24px}
.contact-info{display:flex;flex-direction:column;gap:14px}
.ci{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px}
.ci-label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
.ci b{font-size:18px;color:var(--navy)}
.ci-qr-card{border:2px solid var(--accent);background:#fffef9;flex:1;min-height:180px;padding:18px 18px 16px;display:flex;flex-direction:column;gap:14px}
.qr-header{display:flex;align-items:center;gap:8px}
.qr-badge{font-size:18px;flex-shrink:0}
.qr-body{display:flex;align-items:flex-start;gap:16px;flex:1}
.qr-img-wrap{position:relative;flex-shrink:0;width:110px;height:110px;border-radius:12px;overflow:hidden;border:3px solid var(--accent);box-shadow:0 6px 20px rgba(242,140,40,.25)}
.qr-img{width:100%;height:100%;object-fit:cover;display:block}
.qr-scan-line{position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--cyan),var(--accent));animation:scan 2s ease-in-out infinite}
@keyframes scan{0%,100%{bottom:0;opacity:1}50%{bottom:calc(100% - 3px);opacity:.7}}
.qr-hint{flex:1;display:flex;flex-direction:column;gap:8px;justify-content:center}
.qr-hint p{font-size:13px;color:var(--muted);margin:0;line-height:1.5}
.qr-hint b{color:var(--navy);font-size:15px}
.qr-reveal-overlay{position:absolute;inset:0;background:rgba(253,244,233,.92);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:2;border-radius:9px}
.qr-reveal-overlay.revealed{opacity:0;pointer-events:none;transition:opacity .4s ease}
.qr-reveal-inner{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center}
.qr-reveal-icon{font-size:22px;line-height:1}
.qr-reveal-text{font-size:10px;font-weight:700;color:var(--navy);letter-spacing:.3px;line-height:1.3}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;text-align:center;text-align:left;box-shadow:var(--shadow)}
.field{margin-bottom:16px;text-align:left}
.field label{display:block;font-size:14px;color:var(--navy);margin-bottom:6px;font-weight:600}
.field .req{color:#e53e3e;margin-left:2px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);
  border-radius:10px;font-size:15px;font-family:inherit;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--cyan-ink)}
.field input:invalid:not(:placeholder-shown){border-color:#e53e3e}
.contact-form .btn{width:100%;margin-top:6px}
.contact-form .btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
.field-captcha .captcha-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.captcha-q{display:inline-block;background:#f0f4fa;padding:10px 16px;border-radius:8px;font-weight:700;color:var(--navy);font-family:'Menlo','Consolas',monospace;font-size:18px;letter-spacing:1px;user-select:none}
.field-captcha input[name=captcha]{width:110px;flex-shrink:0;text-align:center;letter-spacing:4px;font-weight:600}
.captcha-refresh{background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px 14px;cursor:pointer;color:var(--muted);font-size:16px;line-height:1;transition:all .15s}
.captcha-refresh:hover{background:#f5f7fb;color:var(--navy);transform:translateY(-1px)}
.form-status{margin-top:14px;padding:12px 16px;border-radius:8px;font-size:14px;line-height:1.5;min-height:1em}
.form-status:empty{display:none}
.form-status.ok{background:#e8f7ec;color:#0f6b2c;border:1px solid #b8e6c2}
.form-status.err{background:#fdecec;color:#a01616;border:1px solid #f5b5b5}
.form-note{font-size:13px;color:var(--muted);margin-top:12px}

/* ---------- Case cards ---------- */
.case-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.case-card:hover{transform:translateY(-6px);box-shadow:0 20px 44px rgba(11,31,58,.14)}
.case-tag{display:inline-block;background:rgba(77,208,230,.14);color:var(--cyan-ink);
  font-weight:700;font-size:12px;padding:6px 12px;border-radius:999px;margin-bottom:16px}
.case-card h3{font-size:20px;color:var(--navy);margin-bottom:18px;line-height:1.4}
.case-block{margin-bottom:12px}
.case-block .cb-label{display:block;font-size:12px;font-weight:700;color:var(--accent);
  letter-spacing:1px;margin-bottom:4px}
.case-block p{color:var(--muted);font-size:14px;margin:0;line-height:1.6}
.case-metrics{display:flex;gap:14px;flex-wrap:wrap;margin-top:18px;padding-top:16px;border-top:1px dashed var(--line)}
.case-metric{flex:1 1 120px}
.case-metric b{display:block;font-size:24px;font-weight:800;color:var(--cyan);line-height:1.2}
.case-metric span{font-size:13px;color:var(--muted)}
.cases-note{margin-top:30px;text-align:center;font-size:13px;color:var(--muted)}

/* ---------- Footer ---------- */
.footer{background:var(--navy);color:#c7d4e8;padding:50px 0 24px}
.footer-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;margin-bottom:26px}
.footer-brand strong{color:#fff;font-size:18px;display:block;margin-bottom:12px}
.footer-brand p{font-size:14px;margin:0}
.footer-brand-line{display:flex;align-items:flex-start;gap:10px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand-line:last-child{border-bottom:none}
.footer-brand-line .fb-icon{font-size:18px;flex-shrink:0;margin-top:1px}
.footer-brand-line .fb-text{color:rgba(199,212,232,.9);line-height:1.6}
.footer-links{display:flex;gap:22px;flex-wrap:wrap}
.footer-links a{color:#c7d4e8;font-size:15px}
.footer-links a:hover{color:#fff}
.footer-contact{display:flex;flex-direction:column;gap:6px;font-size:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;text-align:center;font-size:13px;color:#8fa2bd}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s .2s,transform .6s .2s}
.reveal.in{opacity:1;transform:none;transition:opacity .6s,transform .6s}

/* ---------- Responsive: 平板 (640px–880px) ---------- */
@media (max-width: 880px) {
  .nav-links {
    position: fixed; top: 68px; left: 0; right: 0;
    background: #fff; flex-direction: column;
    align-items: flex-start; gap: 0; padding: 10px 6vw;
    box-shadow: 0 12px 24px rgba(0,0,0,.1);
    transform: translateY(-130%); transition: transform .3s; z-index: 40;
  }
  .nav-links.open { transform: translateY(0) }
  .nav-links a { padding: 14px 0; width: 100%; border-bottom: 1px solid var(--line) }
  .nav-toggle { display: flex }
  .stats-grid { grid-template-columns: repeat(2, 1fr) }

  /* 平板：多列网格 3→2，4→2；2列保持2列；统计条已是2列 */
  .cases-grid   { grid-template-columns: repeat(2, 1fr) }
  .partners-grid { grid-template-columns: repeat(2, 1fr) }
  /* 3列网格（业务卡片/优势）→ 2列 */
  .adv-grid     { grid-template-columns: repeat(2, 1fr) }
  /* about / contact / cards 本身就是2列或非网格，保持不变 */

  /* 修复 inline style 选择器（有空格） */
  .adv-grid[style*="repeat(2, 1fr)"],
  .adv-grid[style*="repeat(2,1fr)"] {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .hero-inner { padding: 60px 0 70px }
}

/* ---------- Responsive: 手机 (< 640px) ---------- */
@media (max-width: 640px) {
  /* 所有多列网格 → 1列 */
  .cards,
  .about-grid,
  .contact-grid,
  .partners-grid {
    grid-template-columns: 1fr;
  }
  /* adv-grid、adv-grid-2 和 cases-grid 移动端统一：1 列（覆盖任意 inline grid 写法） */
  .adv-grid,
  .adv-grid-2,
  .cases-grid { grid-template-columns: 1fr !important }
  .adv-grid[style*="repeat(2"] { grid-template-columns: 1fr !important }
  /* adv-grid 和 cases-grid 子卡片的移动端样式统一：padding 稍收窄但字号保持 */
  .adv-grid .card,
  .cases-grid .card {
    padding: 22px 20px;
    display: flex; flex-direction: column; gap: 8px;
  }
  .adv-grid .card-icon,
  .cases-grid .card-icon { width: 56px; height: 56px; font-size: 24px; margin-bottom: 12px }
  .adv-grid .card h3,
  .cases-grid .card h3 { font-size: 18px; margin-bottom: 4px; line-height: 1.35 }
  .adv-grid .card > p,
  .cases-grid .card > p { font-size: 14px; line-height: 1.65; margin-bottom: 4px }
  .adv-grid .card ul,
  .cases-grid .card ul { gap: 8px }
  .adv-grid .card li,
  .cases-grid .card li { font-size: 13px; padding-left: 16px }
  .adv-grid .card li::before,
  .cases-grid .card li::before { top: 7px; width: 6px; height: 6px }
  .adv-grid .card-link,
  .cases-grid .card-link { font-size: 13px; margin-top: 10px }

  /* WHY US 卡片移动端样式 */
  .whyus-card { padding: 22px 20px }
  .whyus-icon { width: 48px; height: 48px; font-size: 22px; margin-bottom: 14px }
  .whyus-card h3 { font-size: 18px; margin-bottom: 10px }
  .whyus-card p { font-size: 14px }

  /* Section / Hero 垂直 padding 缩小 */
  .section { padding: 56px 0 }
  .hero-inner { padding: 48px 0 58px }

  /* 段落 / 标题 / 副标题缩小 */
  .subtitle { font-size: 15px }
  .section-head p { font-size: 14px }
  .highlight-band p { font-size: 14px; padding: 22px 20px }

  /* kicker 字间距收紧 */
  .kicker { letter-spacing: 0.5px }

  .pl-name { font-size: 18px }

  /* 优势 2→1 */
  .adv { padding: 22px 20px }

  /* Banner 竖向堆叠 */
  .section-banner {
    flex-direction: column; align-items: flex-start; gap: 14px; padding: 20px;
  }

  /* About 双栏 → 单列，隐藏可视化 */
  .about-grid { grid-template-columns: 1fr; gap: 32px }
  .about-visual { display: none }

  /* Footer 文字换行，防止溢出 */
  .footer-bottom {
    font-size: 12px;
    word-break: break-all; overflow-wrap: break-word;
    line-height: 1.6;
  }

  /* Hero 按钮全宽堆叠 */
  .hero-actions { flex-direction: column; gap: 12px }
  .hero-actions .btn { width: 100%; text-align: center; justify-content: center }

  /* 统计数字缩小 */
  .stat b { font-size: clamp(22px, 7vw, 34px) }
  .stat span { font-size: 12px }
}

/* ---------- Responsive: 超窄屏 (< 540px) ---------- */
@media (max-width: 540px) {
  /* cases-grid 在 540px 再变为 1 列（单列极窄屏） */
  .cases-grid { grid-template-columns: 1fr }

  /* 业务特性 3→2→1 */
  .bc-features { grid-template-columns: repeat(2, 1fr) }
  .bc-metrics  { gap: 12px; padding: 14px 16px }
  .business-card { padding: 24px 18px; margin-bottom: 28px }
  .business-card h2 { font-size: clamp(20px, 5.5vw, 26px) }

  /* 解决方案区块头部折行 */
  .solutions-section-header { flex-wrap: wrap; gap: 12px; padding: 18px 20px }
  .solutions-section-header .ssh-icon { width: 44px; height: 44px; font-size: 20px }

  /* CTA 标题自动换行，字号收小 */
  .cta-h2 { white-space: nowrap; font-size: clamp(18px, 5vw, 26px) !important }

  /* 表单验证码行不换行 */
  .captcha-row { flex-wrap: nowrap }
}

/* ---------- Highlight band ---------- */
.highlight-band{background:var(--navy);color:#fff;border-radius:var(--radius);
  padding:30px 34px;margin-top:44px;box-shadow:0 16px 40px rgba(13,43,77,.18)}
.highlight-band p{margin:0;color:#dbe6f5;font-size:16px;line-height:1.85}
.highlight-band b{color:var(--cyan);font-weight:800}
.highlight-band a{color:var(--accent);font-weight:700;text-decoration:none;margin-left:6px}
.highlight-band a:hover{text-decoration:underline}
.subhead{margin:52px 0 26px}
.subhead .kicker{margin-bottom:8px}
.subhead h3{font-size:clamp(22px,2.6vw,28px);color:var(--navy);margin:0;line-height:1.3}
.case-tag.benchmark{background:rgba(13,43,77,.1);color:var(--navy)}
.partner-logo.is-strategic{border-color:var(--accent);box-shadow:0 12px 32px rgba(242,140,40,.16)}
.partner-logo.is-strategic .pl-name{color:var(--accent-2)}

/* ---------- Section banners ---------- */
.section-banner{
  border-radius:var(--radius);
  padding:28px 32px;
  margin:56px 0 28px;
  display:flex;
  align-items:center;
  gap:20px;
}
.section-banner-icon{
  width:64px;height:64px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  font-size:30px;flex-shrink:0;
}
.section-banner-text{flex:1}
.section-banner-text .banner-eyebrow{
  font-size:12px;font-weight:700;letter-spacing:2px;
  opacity:.85;margin-bottom:6px;
}
.section-banner-text h3{
  font-size:clamp(20px,2.4vw,26px);
  font-weight:800;color:inherit;
  margin:0;line-height:1.25;
}
.section-banner-text p{
  font-size:14px;opacity:.85;margin:6px 0 0;
  line-height:1.6;
}
.banner-export{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff}
.banner-export .section-banner-icon{background:rgba(77,208,230,.18)}
.banner-domestic{background:linear-gradient(135deg,#c0392b,#e74c3c);color:#fff}
.banner-domestic .section-banner-icon{background:rgba(255,255,255,.15)}
.banner-retail{background:linear-gradient(135deg,#0d6e4e,#16a085);color:#fff}
.banner-retail .section-banner-icon{background:rgba(255,255,255,.15)}
.banner-industrial{background:linear-gradient(135deg,var(--blue),#1565c0);color:#fff}
.banner-industrial .section-banner-icon{background:rgba(255,255,255,.15)}
.banner-original{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff}
.banner-original .section-banner-icon{background:rgba(255,255,255,.15)}

.case-card .case-badge{display:inline-flex;align-items:center;gap:5px;
  font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px;margin-bottom:12px}
.case-badge-export{background:rgba(77,208,230,.18);color:#0a7ea4}
.case-badge-domestic{background:rgba(242,140,40,.15);color:#c07000}
.case-card h3{font-size:18px;color:var(--navy);margin-bottom:14px;line-height:1.4;font-weight:700}

.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-metric b{font-size:28px}
.case-card.benchmark-card{border-left:4px solid var(--accent)}

/* ---------- Solutions section headers ---------- */
.solutions-section-header{
  background:linear-gradient(90deg,var(--navy),var(--navy-2));
  border-radius:var(--radius);
  padding:24px 30px;
  margin:52px 0 26px;
  display:flex;
  align-items:center;
  gap:16px;
}
.solutions-section-header .ssh-icon{
  width:52px;height:52px;border-radius:12px;
  background:rgba(77,208,230,.15);
  display:flex;align-items:center;justify-content:center;
  font-size:24px;flex-shrink:0;
}
.solutions-section-header h3{font-size:clamp(18px,2vw,23px);color:#fff;font-weight:800;margin:0}
.solutions-section-header p{font-size:13px;color:rgba(255,255,255,.75);margin:4px 0 0}
.subhead-upgrade{margin:40px 0 20px}
.subhead-upgrade .kicker{font-size:12px;letter-spacing:2px}

/* ========== 移动端导航遮罩层 ========== */
.nav-links::before{
  content:'';
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.3);
  opacity:0;
  transition:opacity .3s;
  pointer-events:none;
  z-index:-1;
}
.nav-links.open::before{
  opacity:1;
  pointer-events:auto;
}

/* ---------- Business cards ---------- */
.business-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:36px;margin-bottom:36px;box-shadow:var(--shadow)}
.business-card-primary{border-top:4px solid var(--accent)}
.bc-label .kicker{color:var(--accent);font-weight:700;font-size:13px;letter-spacing:2px;margin-bottom:0}
.business-card h2{font-size:clamp(22px,2.8vw,32px);color:var(--navy);margin:10px 0 18px}
.bc-desc{color:var(--muted);font-size:16px;margin-bottom:28px}
.bc-features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:28px}
.bcf-icon{font-size:26px;display:block;margin-bottom:10px}
.bc-feature h4{color:var(--navy);font-size:17px;margin-bottom:6px}
.bc-feature p{color:var(--muted);font-size:14px}
.bc-metrics{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:24px;padding:20px 24px;background:#f0f4fa;border-radius:12px}
.bc-metric{text-align:center}
.bc-metric b{display:block;font-size:28px;font-weight:800;color:var(--cyan)}
.bc-metric span{font-size:13px;color:var(--muted)}

/* ---------- Scrollbar ---------- */
@media(min-width:881px){
  ::-webkit-scrollbar{width:6px}
  ::-webkit-scrollbar-track{background:var(--bg)}
  ::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}
  ::-webkit-scrollbar-thumb:hover{background:var(--muted)}
}

/* prevent lines from wrapping inside headings */
.nowrap{white-space:nowrap}

/* ---------- Form enhancements ---------- */
.checkbox-label{display:flex;align-items:flex-start;gap:10px;cursor:pointer;font-size:13px;color:var(--muted);line-height:1.5;margin-bottom:4px}
.checkbox-label input[type="checkbox"]{margin-top:3px;flex-shrink:0;width:16px;height:16px;accent-color:var(--accent);cursor:pointer}
.checkbox-label a{color:var(--accent-2);text-decoration:underline}
.form-success{
  background:linear-gradient(135deg,rgba(77,208,230,.12),rgba(13,43,77,.08));
  border:1px solid rgba(77,208,230,.35);border-radius:var(--radius);
  padding:20px 24px;margin:12px 0;font-size:16px;color:var(--navy);
  text-align:center
}

/* ---------- Language switcher ---------- */
.lang-switch{
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px;
  padding:3px 10px;border:1px solid var(--accent);border-radius:999px;
  transition:background .2s,color .2s;white-space:nowrap
}
.lang-switch:hover{background:var(--accent);color:#fff}