/* ============================================================
   TransHero — 设计系统（青绿科技风）
   品牌色 teal #0FA3A3 · 清爽浅色 · 适合 AI 产品
   ============================================================ */
:root{
  --teal:#0FA3A3; --teal-deep:#0a7d7d; --teal-dark:#07343a;
  --accent:#17d6c4; --accent-glow:rgba(15,163,163,.18);
  --ink:#0c2127; --ink-soft:#44595f; --ink-faint:#8aa0a3;
  --bg:#f3f9f9; --bg-alt:#e9f4f4; --surface:#ffffff;
  --line:#d6e7e7; --line-soft:#e7f1f1;
  --ok:#1f9d6b; --warn:#e8833a;
  --shadow:0 12px 40px -12px rgba(7,52,58,.18);
  --shadow-sm:0 4px 16px -6px rgba(7,52,58,.14);
  --radius:18px; --radius-sm:12px;
  --wrap:1120px;
  --font:"Noto Sans JP","Hiragino Sans",-apple-system,"Segoe UI",sans-serif;
  --font-en:"Inter",var(--font);
  --font-mono:"JetBrains Mono","SF Mono",monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.75;letter-spacing:.01em;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* 背景科技网格 */
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:54px 54px;mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 80%);opacity:.6}
main,header,footer,section{position:relative;z-index:1}
.wrap{width:min(var(--wrap),92%);margin-inline:auto}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(243,249,249,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.01em;font-size:1.12rem}
.brand .mark{width:34px;height:34px;border-radius:9px;object-fit:cover;background:#fff;box-shadow:0 4px 14px var(--accent-glow);flex:0 0 auto}
.brand{align-items:center}
.brand .jp{color:var(--ink-faint);font-weight:600;font-size:.82rem;letter-spacing:.08em}
.nav__links{display:flex;gap:6px;margin-left:auto;align-items:center}
.nav__links a{padding:8px 14px;border-radius:10px;font-size:.92rem;font-weight:600;color:var(--ink-soft);transition:.18s}
.nav__links a:hover{background:var(--bg-alt);color:var(--teal-deep)}
.nav__links a.cta{background:var(--teal);color:#fff;box-shadow:0 6px 18px var(--accent-glow)}
.nav__links a.cta:hover{background:var(--teal-deep);color:#fff}
.langsel{display:flex;gap:2px;border:1px solid var(--line);border-radius:10px;padding:3px;background:var(--surface)}
.langsel a{padding:4px 9px;border-radius:7px;font-size:.78rem;font-weight:700;color:var(--ink-faint)}
.langsel a.on{background:var(--teal);color:#fff}
html[lang="ja"] .langsel a[data-l="ja"],html[lang="zh"] .langsel a[data-l="zh"],html[lang="en"] .langsel a[data-l="en"],html[lang="vi"] .langsel a[data-l="vi"]{background:var(--teal);color:#fff}
.burger{display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:var(--surface);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px}
.burger span{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}

/* ---------- 通用 ---------- */
.section{padding:84px 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.74rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--teal-deep);margin-bottom:16px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--teal)}
h1,h2,h3{line-height:1.25;letter-spacing:-.01em;font-weight:800}
.h-sec{font-size:clamp(1.7rem,3.6vw,2.5rem);margin-bottom:14px}
.sub{color:var(--ink-soft);font-size:1.04rem;max-width:54ch}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:12px;font-weight:700;font-size:.96rem;transition:.18s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 22px var(--accent-glow)}
.btn-primary:hover{background:var(--teal-deep);transform:translateY(-1px)}
.btn-ghost{background:var(--surface);color:var(--teal-deep);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--teal);background:var(--bg-alt)}

/* ---------- HERO ---------- */
.hero{padding:76px 0 64px;background:radial-gradient(ellipse 90% 70% at 70% -10%,var(--bg-alt),transparent 60%)}
.hero__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(2.1rem,5.2vw,3.5rem);letter-spacing:-.02em}
.hero h1 .grad{background:linear-gradient(120deg,var(--teal),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__lead{margin:22px 0 28px;font-size:1.12rem;color:var(--ink-soft);max-width:46ch}
.hero__cta{display:flex;gap:12px;flex-wrap:wrap}
.stores{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.store{display:inline-flex;align-items:center;gap:9px;padding:10px 16px;border-radius:12px;background:var(--ink);color:#fff;font-size:.84rem;font-weight:600;transition:.18s}
.store:hover{transform:translateY(-1px);background:var(--teal-dark)}
.store small{display:block;font-size:.66rem;opacity:.7;font-weight:500}
.langbadges{display:flex;flex-wrap:wrap;gap:7px;margin-top:26px}
.langbadges span{font-family:var(--font-mono);font-size:.72rem;font-weight:600;padding:5px 10px;border-radius:8px;background:var(--surface);border:1px solid var(--line);color:var(--ink-soft)}

/* hero 右侧视觉卡 */
.hero__visual{background:linear-gradient(160deg,var(--teal-dark),#0a4a4a);border-radius:24px;padding:28px;color:#fff;box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero__visual::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 10%,rgba(23,214,196,.25),transparent 50%)}
.chatline{display:flex;gap:10px;margin-bottom:14px;position:relative;z-index:1}
.chatline .who{font-family:var(--font-mono);font-size:.7rem;opacity:.6;min-width:42px;padding-top:3px}
.chatline .bubble{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:9px 13px;font-size:.86rem;line-height:1.5}
.chatline.out .bubble{background:rgba(23,214,196,.18);border-color:rgba(23,214,196,.3)}

/* ---------- 三大入口卡 ---------- */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pillar{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.2s;display:flex;flex-direction:column}
.pillar:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--teal)}
.pillar .ic{width:48px;height:48px;border-radius:13px;background:var(--bg-alt);display:grid;place-items:center;font-size:1.5rem;margin-bottom:18px}
.pillar h3{font-size:1.22rem;margin-bottom:10px}
.pillar p{color:var(--ink-soft);font-size:.95rem;flex:1}
.pillar .more{margin-top:18px;color:var(--teal-deep);font-weight:700;font-size:.9rem}

/* ---------- 特性条 ---------- */
.feat-band{background:var(--teal-dark);color:#fff;border-radius:24px;padding:46px 40px;display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
.feat-band .stat .n{font-size:2.2rem;font-weight:800;background:linear-gradient(120deg,#fff,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.feat-band .stat .l{font-size:.86rem;opacity:.8;margin-top:4px}

/* ---------- 场景 ---------- */
.scenes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.scene{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:24px}
.scene h4{font-size:1.05rem;margin-bottom:8px;display:flex;align-items:center;gap:9px}
.scene p{color:var(--ink-soft);font-size:.9rem}

/* ---------- CTA 收尾 ---------- */
.endcta{background:linear-gradient(160deg,var(--teal),var(--teal-deep));border-radius:24px;padding:56px 40px;text-align:center;color:#fff}
.endcta h2{font-size:clamp(1.6rem,3.5vw,2.3rem);margin-bottom:12px}
.endcta p{opacity:.92;margin-bottom:26px}
.endcta .btn-primary{background:#fff;color:var(--teal-deep)}
.endcta .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.qr-block{display:flex;gap:22px;justify-content:center;margin-top:28px;flex-wrap:wrap}
.qr-item{background:#fff;border-radius:14px;padding:12px 12px 8px;box-shadow:0 8px 22px rgba(0,0,0,.16)}
.qr-item img{display:block;border-radius:6px;width:130px;height:130px}
.qr-item span{display:block;text-align:center;font-size:.72rem;color:var(--teal-deep);font-weight:700;margin-top:8px;letter-spacing:.02em}
@media(max-width:640px){.qr-block{display:none}}

/* ---------- 页脚 ---------- */
.foot{background:var(--teal-dark);color:#cfe8e8;padding:54px 0 30px;margin-top:20px}
.foot__top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.12)}
.foot h5{color:#fff;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:14px;font-weight:700}
.foot a{display:block;color:#aacccc;font-size:.92rem;padding:5px 0;transition:.15s}
.foot a:hover{color:#fff}
.foot__brand p{font-size:.92rem;color:#9fc4c4;max-width:36ch;margin-top:12px}
.foot__company{padding:22px 0 4px;border-top:1px solid rgba(255,255,255,.1);margin-top:6px;font-size:.85rem;color:#9fc4c4;line-height:1.85}
.foot__company .fc-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 30px;margin:8px 0}
.foot__company b{color:#d6eded;font-weight:600;margin-right:9px;font-size:.78rem;letter-spacing:.02em}
.foot__company a{color:#aacccc}
.foot__company a:hover{color:#fff}
.foot__company .fc-legal{display:flex;gap:18px;flex-wrap:wrap;margin-top:12px}
.foot__company .fc-legal a{color:#bfe3e3;font-weight:600}
@media(max-width:640px){.foot__company .fc-grid{grid-template-columns:1fr}}
.foot__bottom{padding-top:22px;font-size:.82rem;color:#84acac;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- 语言显隐 ---------- */
[data-lang]{display:none}
html[lang="ja"] [data-lang="ja"],html[lang="zh"] [data-lang="zh"],
html[lang="en"] [data-lang="en"],html[lang="vi"] [data-lang="vi"]{display:revert}

/* ---------- 响应式 ---------- */
@media(max-width:920px){
  .hero__grid{grid-template-columns:1fr;gap:32px}
  .pillars{grid-template-columns:1fr}
  .feat-band{grid-template-columns:repeat(2,1fr);padding:36px 28px}
  .scenes{grid-template-columns:1fr}
  .foot__top{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav__links{position:fixed;inset:64px 0 auto 0;flex-direction:column;background:var(--surface);border-bottom:1px solid var(--line);padding:14px;gap:4px;display:none;box-shadow:var(--shadow)}
  .nav__links.open{display:flex}
  .nav__links a{width:100%}
  .langsel{margin-top:8px}
  .burger{display:flex}
  .section{padding:60px 0}
  .feat-band{grid-template-columns:1fr;text-align:center}
  .foot__top{grid-template-columns:1fr}
}