/* ===================================================================
   镭捷医疗 LEIJEX × MAKGRAC · 样式表
   设计语言：临床权威 · 工程精密 · 人本智能 · 克制自信
   双品牌配色：MAKGRAC 青绿（生美） · LEIJEX 绛红（医美）
   =================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  /* 主色 - 深海蓝（临床权威） */
  --navy-900: #051224;
  --navy-800: #0a2540;
  --navy-700: #0f3358;
  --navy-600: #15467a;

  /* MAKGRAC 强调色 - 青绿（生美 / 自然 / 优雅） */
  --teal-400: #2dd4bf;
  --teal-500: #14b8a6;
  --teal-600: #0d9488;
  --teal-50: #f0fdfa;

  /* LEIJEX 强调色 - 绛红（医美 / 精密 / 院线） */
  --rose-400: #e85d8a;
  --rose-500: #c8336e;
  --rose-600: #a82858;
  --rose-50: #fdf2f7;

  /* 中性 */
  --ink-900: #0b1220;
  --ink-700: #334155;
  --ink-500: #64748b;
  --ink-300: #cbd5e1;
  --ink-100: #f1f5f9;
  --ink-50: #f8fafc;
  --white: #ffffff;

  /* 功能 */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 3px rgba(5,18,36,.10);
  --shadow: 0 8px 30px rgba(5,18,36,.10);
  --shadow-lg: 0 20px 60px rgba(5,18,36,.15);
  --maxw: 1200px;
  --header-h: 68px;
  --topbar-h: 36px;

  --ff: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --ff-mono: "SF Mono", "Cascadia Code", Consolas, monospace;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 20px); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--ff); font-size: 16px; line-height: 1.7; color: var(--ink-900);
  background: var(--white); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s, opacity .25s; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* ---------- 布局 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-eyebrow { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--teal-600); margin-bottom: 12px; }
.section-title { font-size: clamp(26px, 4vw, 38px); font-weight: 800; color: var(--navy-800); line-height: 1.25; }
.section-lead { margin-top: 16px; color: var(--ink-500); font-size: 17px; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600;
  transition: all .3s cubic-bezier(.4,0,.2,1); white-space: nowrap; cursor: pointer; border: 2px solid transparent; }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-block { width: 100%; }
.btn-primary { background: var(--teal-500); color: var(--white); }
.btn-primary:hover { background: var(--teal-600); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(20,184,166,.35); }
.btn-outline { border-color: var(--ink-300); color: var(--navy-800); background: transparent; }
.btn-outline:hover { border-color: var(--teal-500); color: var(--teal-600); }
.btn-ghost { background: rgba(255,255,255,.1); color: var(--white); border: 1px solid rgba(255,255,255,.25); backdrop-filter: blur(8px); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }

/* ---------- 顶部公告条 ---------- */
.topbar { background: var(--navy-900); color: rgba(255,255,255,.7); font-size: 13px; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; height: var(--topbar-h); }
.topbar-links { display: flex; align-items: center; gap: 10px; }
.topbar-links a:hover { color: var(--teal-400); }
.topbar-links .sep { opacity: .3; }

/* ---------- 顶部导航 ---------- */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px); border-bottom: 1px solid var(--ink-100); transition: box-shadow .3s; }
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--navy-800); }
.brand-mark { color: var(--teal-500); display: flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-cn { font-size: 16px; font-weight: 700; }
.brand-en { font-size: 11px; font-weight: 600; letter-spacing: .12em; color: var(--ink-500); }
.nav { display: flex; align-items: center; gap: 32px; }
.nav-list { display: flex; align-items: center; gap: 26px; }
.nav-list a { font-size: 15px; font-weight: 500; color: var(--ink-700); position: relative; }
.nav-list a:hover { color: var(--teal-600); }
.nav-list a::after { content: ''; position: absolute; bottom: -6px; left: 0; width: 0; height: 2px;
  background: var(--teal-500); transition: width .3s; }
.nav-list a:hover::after { width: 100%; }
.nav-cta-group { display: flex; gap: 10px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--navy-800); border-radius: 2px; transition: .3s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 品牌主视觉 ---------- */
.hero { position: relative; background: var(--navy-900); color: var(--white); overflow: hidden; padding: 100px 0 120px; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-grid { position: absolute; inset: 0;
  background-image: linear-gradient(rgba(45,212,191,.06) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(45,212,191,.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 80%); }
.hero-glow, .hero-glow-2 { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .35; }
.hero-glow { width: 500px; height: 500px; background: var(--teal-500); top: -100px; right: -50px; }
.hero-glow-2 { width: 400px; height: 400px; background: var(--rose-500); bottom: -100px; left: -50px; opacity: .25; }
.hero-inner { position: relative; z-index: 1; text-align: center; }
.eyebrow { font-size: 14px; font-weight: 600; letter-spacing: .1em; color: var(--teal-400); margin-bottom: 20px; }
.hero-title { font-size: clamp(32px, 6vw, 56px); font-weight: 800; line-height: 1.15; letter-spacing: -.02em; margin-bottom: 24px; }
.hero-sub { font-size: clamp(16px, 2vw, 19px); color: rgba(255,255,255,.75); max-width: 640px; margin: 0 auto 36px; line-height: 1.9; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 64px; }
.hero-stats { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; }
.hero-stats li { text-align: center; }
.hero-stats strong { display: block; font-size: clamp(28px, 4vw, 40px); font-weight: 800; color: var(--teal-400); }
.hero-stats span { font-size: 14px; color: rgba(255,255,255,.6); }

/* ---------- 面向对象价值 ---------- */
.audience-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.audience-card { background: var(--white); border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 32px 28px; transition: all .3s; }
.audience-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.audience-icon { display: inline-flex; color: var(--teal-500); margin-bottom: 16px; }
.audience-card h3 { font-size: 19px; font-weight: 700; color: var(--navy-800); margin-bottom: 10px; }
.audience-card p { font-size: 14px; color: var(--ink-500); }

/* ---------- 核心能力 ---------- */
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.capability-card { background: var(--white); border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 32px 24px; transition: all .3s; position: relative; overflow: hidden; }
.capability-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.cap-num { font-size: 40px; font-weight: 800; color: var(--ink-100); line-height: 1; display: block; margin-bottom: 12px; }
.capability-card h3 { font-size: 18px; font-weight: 700; color: var(--navy-800); margin-bottom: 8px; }
.capability-card p { font-size: 14px; color: var(--ink-500); line-height: 1.7; }

/* ---------- 双品牌架构 ---------- */
.dual-brand-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.brand-block { border-radius: var(--radius-lg); padding: 40px 36px; position: relative; overflow: hidden; transition: transform .3s; }
.brand-block:hover { transform: translateY(-4px); }
.brand-makgrac { background: linear-gradient(160deg, var(--teal-50), #e6fffa); border: 1px solid #b2f5ea; }
.brand-leijex { background: linear-gradient(160deg, var(--rose-50), #fce7f1); border: 1px solid #f5c2dc; }
.brand-header { margin-bottom: 16px; }
.brand-name-en { font-size: 30px; font-weight: 800; letter-spacing: .02em; }
.brand-makgrac .brand-name-en { color: var(--teal-600); }
.brand-leijex .brand-name-en { color: var(--rose-600); }
.brand-tagline { font-size: 14px; color: var(--ink-500); margin-top: 6px; }
.brand-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.brand-badge { font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 20px;
  background: rgba(20,184,166,.12); color: var(--teal-600); }
.brand-badge-med { background: rgba(200,51,110,.12); color: var(--rose-600); }
.brand-desc { font-size: 14px; color: var(--ink-700); line-height: 1.8; margin-bottom: 20px; }
.brand-beliefs { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.belief { display: flex; flex-direction: column; gap: 2px; padding: 12px 16px; background: rgba(255,255,255,.6); border-radius: var(--radius-sm); }
.belief strong { font-size: 14px; color: var(--navy-800); }
.belief span { font-size: 13px; color: var(--ink-500); }
.brand-count { display: flex; align-items: baseline; gap: 8px; margin-bottom: 16px; padding: 16px; background: rgba(255,255,255,.7); border-radius: var(--radius-sm); }
.brand-count-num { font-size: 36px; font-weight: 800; }
.brand-makgrac .brand-count-num { color: var(--teal-600); }
.brand-leijex .brand-count-num { color: var(--rose-600); }
.brand-count-label { font-size: 14px; color: var(--ink-500); }
.brand-series-list { display: flex; flex-wrap: wrap; gap: 8px; }
.brand-series-list span { font-size: 12px; padding: 5px 12px; border-radius: 16px; background: rgba(255,255,255,.7); color: var(--ink-700); }
.arch-note { text-align: center; font-size: 13px; color: var(--ink-500); margin-top: 32px; line-height: 1.7; }

/* ---------- 解决方案 ---------- */
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card { background: var(--white); border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 28px 24px; transition: all .3s; }
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.sol-icon { display: inline-flex; color: var(--teal-500); margin-bottom: 14px; }
.solution-card h3 { font-size: 18px; font-weight: 700; color: var(--navy-800); margin-bottom: 8px; }
.solution-card p { font-size: 14px; color: var(--ink-500); line-height: 1.7; }
.sol-highlight { background: linear-gradient(135deg, var(--navy-800), var(--navy-600)); border: none; }
.sol-highlight h3 { color: var(--white); }
.sol-highlight p { color: rgba(255,255,255,.75); }
.sol-highlight .sol-icon { color: var(--teal-400); }

/* ---------- 产品系列（通用） ---------- */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.product-card { position: relative; background: var(--white); border: 1px solid var(--ink-100); border-radius: var(--radius);
  overflow: hidden; transition: all .3s; }
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-media { background: linear-gradient(135deg, var(--teal-50), #e6fffa); padding: 28px; display: flex;
  align-items: center; justify-content: center; min-height: 160px; color: var(--teal-600); }
.product-media-med { background: linear-gradient(135deg, var(--rose-50), #fce7f1); color: var(--rose-500); }
.product-body { padding: 20px 22px 24px; }
.product-series { font-size: 11px; font-weight: 700; color: var(--teal-600); letter-spacing: .08em;
  background: var(--teal-50); padding: 3px 10px; border-radius: 4px; display: inline-block; margin-bottom: 10px; }
.product-series-med { color: var(--rose-600); background: var(--rose-50); }
.product-body h3 { font-size: 17px; font-weight: 700; color: var(--navy-800); margin-bottom: 6px; }
.product-body h3 sup { font-size: 10px; font-weight: 600; }
.product-cat { font-size: 13px; color: var(--ink-500); font-weight: 600; margin-bottom: 8px; }
.product-desc { font-size: 13px; color: var(--ink-500); line-height: 1.7; margin-bottom: 14px; }
.product-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.product-tags span { font-size: 11px; padding: 3px 10px; border-radius: 12px; background: var(--ink-50); color: var(--ink-700); }
.product-card-med { border-color: #f5c2dc; }
.product-card-med:hover { border-color: transparent; }

/* Stretched link for clickable product cards */
.product-card-link { position: absolute; inset: 0; z-index: 1; border-radius: var(--radius); }
.product-card-link::after { content: 'View Details →'; position: absolute; bottom: 0; left: 0; right: 0; padding: 10px; text-align: center; font-size: 13px; font-weight: 600; color: var(--teal-600); background: linear-gradient(to top, var(--teal-50), transparent); opacity: 0; transition: opacity .3s; border-radius: 0 0 var(--radius) var(--radius); }
:root[lang="zh-CN"] .product-card-link::after,
html[lang="zh-CN"] .product-card-link::after { content: '查看详情 →'; }
.product-card:hover .product-card-link::after { opacity: 1; }
.products-note { text-align: center; font-size: 13px; color: var(--ink-500); margin-top: 32px; line-height: 1.7; max-width: 800px; margin-left: auto; margin-right: auto; }

/* ---------- 技术与合规特性 ---------- */
.tech-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tech-feat { display: flex; gap: 16px; align-items: flex-start; background: var(--ink-50); border-radius: var(--radius); padding: 24px; transition: all .3s; }
.tech-feat:hover { background: var(--white); box-shadow: var(--shadow); }
.tech-feat-icon { flex-shrink: 0; display: inline-flex; color: var(--teal-500); width: 44px; height: 44px;
  background: var(--teal-50); border-radius: 10px; align-items: center; justify-content: center; }
.tech-feat h4 { font-size: 16px; font-weight: 700; color: var(--navy-800); margin-bottom: 4px; }
.tech-feat p { font-size: 13px; color: var(--ink-500); }

/* ---------- 认证质量 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; }
.cert-card { background: var(--white); border-radius: var(--radius); padding: 36px 24px; text-align: center;
  box-shadow: var(--shadow-sm); transition: transform .3s; border: 1px solid transparent; }
.cert-card:hover { transform: translateY(-4px); border-color: var(--teal-400); }
.cert-badge { display: inline-flex; color: var(--teal-500); margin-bottom: 16px; }
.cert-card h3 { font-size: 24px; font-weight: 800; color: var(--navy-800); margin-bottom: 6px; }
.cert-card p { font-size: 14px; color: var(--ink-500); }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; }
.mvv-grid { display: flex; flex-direction: column; gap: 20px; margin-top: 28px; }
.mvv-item { padding: 18px 22px; background: var(--ink-50); border-radius: var(--radius); border-left: 3px solid var(--teal-500); }
.mvv-label { font-size: 12px; font-weight: 700; color: var(--teal-600); letter-spacing: .1em; text-transform: uppercase; display: block; margin-bottom: 6px; }
.mvv-item p { font-size: 14px; color: var(--ink-700); line-height: 1.7; }
.mvv-values { border-left-color: var(--rose-500); }
.mvv-values .mvv-label { color: var(--rose-600); }
.values-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.values-tags span { font-size: 13px; font-weight: 600; padding: 6px 14px; border-radius: 16px;
  background: var(--white); color: var(--navy-800); border: 1px solid var(--ink-100); }
.panel-card { background: var(--navy-900); border-radius: var(--radius-lg); height: 380px; position: relative;
  overflow: hidden; display: flex; align-items: center; justify-content: center; }
.panel-line { position: absolute; width: 80%; height: 1px; background: linear-gradient(90deg, transparent, var(--teal-500), transparent); }
.panel-rings { position: relative; }
.panel-rings span { position: absolute; border: 1px solid rgba(45,212,191,.3); border-radius: 50%; }
.panel-rings span:nth-child(1) { width: 120px; height: 120px; top: -60px; left: -60px; }
.panel-rings span:nth-child(2) { width: 180px; height: 180px; top: -90px; left: -90px; opacity: .6; }
.panel-rings span:nth-child(3) { width: 240px; height: 240px; top: -120px; left: -120px; opacity: .3; }
.panel-tag { position: absolute; bottom: 28px; font-size: 11px; letter-spacing: .15em;
  color: rgba(255,255,255,.4); font-family: var(--ff-mono); }

/* ===== 关于镭捷 · 照片展示 ===== */
.about-photos { display: flex; flex-direction: column; gap: 18px; }
.about-photo { position: relative; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: 0 12px 40px rgba(10,37,64,.15); background: #e8eef3; }
.about-photo img { display: block; width: 100%; height: auto; }
.about-photo-main img { max-height: 320px; object-fit: cover; }
.about-photo-sub img { max-height: 220px; object-fit: cover; }
.about-photo-caption { position: absolute; left: 0; right: 0; bottom: 0;
  padding: 18px 22px 14px;
  background: linear-gradient(to top, rgba(10,37,64,.92), rgba(10,37,64,0));
  color: #fff; }
.about-photo-caption strong { display: block; font-size: 1rem; font-weight: 600; margin-bottom: 2px; }
.about-photo-caption span { font-size: .82rem; opacity: .85; }

/* ---------- 合作支持 ---------- */
.coop-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.coop-card { background: var(--white); border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 28px 24px; text-align: center; transition: all .3s; }
.coop-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.coop-icon { display: inline-flex; color: var(--teal-500); margin-bottom: 14px; }
.coop-card h3 { font-size: 16px; font-weight: 700; color: var(--navy-800); margin-bottom: 8px; }
.coop-card p { font-size: 13px; color: var(--ink-500); }

/* ---------- 联系方式 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: start; }
.contact-list { margin-top: 32px; display: flex; flex-direction: column; gap: 20px; }
.contact-list li { display: flex; gap: 16px; align-items: flex-start; }
.contact-ic { flex-shrink: 0; color: var(--teal-500); margin-top: 2px; }
.contact-label { font-size: 12px; color: var(--ink-500); text-transform: uppercase; letter-spacing: .06em;
  display: block; margin-bottom: 2px; }
.contact-value { font-size: 15px; color: var(--navy-800); font-weight: 500; }
.contact-form { background: var(--ink-50); border-radius: var(--radius); padding: 32px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--navy-800); margin-bottom: 6px; }
.field input, .field select, .field textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--ink-300);
  border-radius: var(--radius-sm); font-size: 15px; font-family: inherit; background: var(--white); transition: border-color .25s; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--teal-500);
  box-shadow: 0 0 0 3px rgba(20,184,166,.12); }
.form-note { margin-top: 14px; font-size: 14px; font-weight: 600; }
.form-note.ok { color: var(--teal-600); }
.form-note.err { color: #e11d48; }
.form-hint { margin-top: 8px; font-size: 12px; color: var(--ink-500); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-900); color: rgba(255,255,255,.6); padding: 64px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 2fr; gap: 60px; padding-bottom: 48px; }
.brand-footer { color: var(--white); margin-bottom: 14px; }
.footer-tag { font-size: 14px; margin-bottom: 20px; }
.footer-cert-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.fc-badge { font-size: 11px; font-weight: 700; padding: 4px 12px; border-radius: 4px;
  background: rgba(45,212,191,.15); color: var(--teal-400); border: 1px solid rgba(45,212,191,.2); }
.footer-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col h4 { font-size: 14px; font-weight: 700; color: var(--white); margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; }
.footer-col a:hover { color: var(--teal-400); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 24px; text-align: center; }
.footer-disclaimer { font-size: 12px; line-height: 1.7; margin-bottom: 10px; max-width: 800px; margin-left: auto; margin-right: auto; }
.footer-copy { font-size: 13px; }

/* ---------- 滚动出现动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  * { scroll-behavior: auto !important; }
}

/* ===================================================================
   响应式 · 平板
   =================================================================== */
@media (max-width: 968px) {
  .section { padding: 72px 0; }
  .audience-grid { grid-template-columns: 1fr; }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .dual-brand-grid { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr 1fr; }
  .tech-features { grid-template-columns: 1fr 1fr; }
  .coop-grid { grid-template-columns: 1fr 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; gap: 36px; }
}

/* ===================================================================
   响应式 · 手机
   =================================================================== */
@media (max-width: 640px) {
  .section { padding: 56px 0; }
  .container { padding: 0 20px; }
  .topbar { display: none; }
  .nav { position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; background: var(--white);
    flex-direction: column; align-items: stretch; padding: 24px; gap: 20px; transform: translateX(100%);
    transition: transform .35s; overflow-y: auto; z-index: 99; }
  .nav.open { transform: none; box-shadow: var(--shadow-lg); }
  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-list a { display: block; padding: 14px 12px; font-size: 16px; border-bottom: 1px solid var(--ink-100); }
  .nav-list a::after { display: none; }
  .nav-cta-group { flex-direction: column; gap: 10px; margin-top: 12px; }
  .nav-cta-group .btn { width: 100%; }
  .nav-toggle { display: flex; z-index: 101; }

  .hero { padding: 64px 0 80px; }
  .hero-actions { flex-direction: column; align-items: stretch; gap: 12px; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { gap: 24px; }
  .section-title { font-size: 24px; }
  .section-head { margin-bottom: 36px; }

  .capability-grid { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr; }
  .tech-features { grid-template-columns: 1fr; }
  .coop-grid { grid-template-columns: 1fr; }
  .brand-block { padding: 28px 22px; }
  .contact-form { padding: 24px 20px; }
  .footer-nav { grid-template-columns: 1fr 1fr; gap: 24px; }
  .about-photos { gap: 14px; }
  .about-photo-main img { max-height: 240px; }
  .about-photo-sub img { max-height: 180px; }
}

/* ---------- 单品牌展示（替换双品牌网格）---------- */
.single-brand-showcase { display: flex; justify-content: center; }
.brand-block-large {
  max-width: 720px; width: 100%;
  padding: 40px; border-radius: 20px;
  background: linear-gradient(160deg, var(--rose-50), #fce7f1);
  border: 1px solid #f5c2dc;
}
.brand-block-large .brand-name-en { font-size: 36px; color: var(--rose-600); }
.brand-block-large .brand-tagline { color: var(--rose-500); font-size: 16px; margin: 6px 0 16px; }
.brand-block-large .brand-desc { color: var(--ink-500); line-height: 1.8; font-size: 15px; }
.brand-highlights { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.brand-hl {
  display: inline-block; padding: 6px 16px;
  background: var(--rose-50); color: var(--rose-600);
  border: 1px solid var(--rose-200); border-radius: 20px;
  font-size: 13px; font-weight: 600;
}
@media (max-width: 768px) {
  .brand-block-large { padding: 28px 20px; }
  .brand-block-large .brand-name-en { font-size: 28px; }
}