/* Unismart Portfolio — 低调奢华 / understated luxury */
:root{
  --ink:#0a0c0b;
  --ink-2:#0f1311;
  --ink-3:#141917;
  --line:rgba(198,168,103,.18);
  --gold:#c6a867;
  --gold-soft:#e0cd9a;
  --brand:#009944;
  --brand-lift:#28c06a;
  --text:#e8e6e1;
  --text-dim:#9c9a94;
  --text-faint:#6d6b66;
  --maxw:1180px;
  --serif:"Songti SC","Noto Serif SC",Georgia,"Times New Roman",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Noto Sans SC",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ink);color:var(--text);
  font-family:var(--sans);line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(900px 520px at 78% -8%,rgba(198,168,103,.09),transparent 62%),
    radial-gradient(700px 460px at 8% 22%,rgba(0,153,68,.07),transparent 60%);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;position:relative;z-index:1}

/* ---------- language switching ---------- */
body[data-lang="zh"] [data-en],
body[data-lang="en"] [data-zh]{display:none !important}
body[data-lang="en"]{font-family:var(--sans)}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(10,12,11,.72);
  backdrop-filter:saturate(150%) blur(14px);
  -webkit-backdrop-filter:saturate(150%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .4s var(--ease),background .4s var(--ease);
}
.nav.on{border-bottom-color:var(--line);background:rgba(10,12,11,.9)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:14px 28px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:baseline;gap:10px;letter-spacing:.14em;font-family:var(--serif);font-size:17px}
.brand b{color:var(--gold);font-weight:600}
.brand span{color:var(--text-faint);font-size:11px;letter-spacing:.24em;text-transform:uppercase}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:30px;font-size:13.5px;color:var(--text-dim);letter-spacing:.06em}
.nav-links a{position:relative;padding:4px 0;transition:color .3s var(--ease)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--gold);transition:width .35s var(--ease)}
.nav-links a:hover{color:var(--gold-soft)}
.nav-links a:hover::after{width:100%}
.lang{
  display:flex;align-items:center;gap:2px;border:1px solid var(--line);border-radius:999px;
  padding:3px;background:rgba(255,255,255,.02);
}
.lang button{
  background:none;border:0;color:var(--text-faint);cursor:pointer;
  font:inherit;font-size:11.5px;letter-spacing:.14em;padding:4px 11px;border-radius:999px;
  transition:color .3s var(--ease),background .3s var(--ease);
}
.lang button[aria-pressed="true"]{background:linear-gradient(180deg,rgba(198,168,103,.22),rgba(198,168,103,.1));color:var(--gold-soft)}
.burger{display:none;margin-left:auto;background:none;border:0;color:var(--text);font-size:20px;cursor:pointer}

/* ---------- hero ---------- */
.hero{
  min-height:100svh;display:flex;align-items:center;
  padding:120px 0 70px;position:relative;overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--gold);
  margin-bottom:26px;
}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--gold);opacity:.7}
h1{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(34px,4.6vw,60px);line-height:1.24;margin:0 0 26px;letter-spacing:.01em;
}
h1 em{font-style:normal;color:var(--gold);position:relative}
.lede{font-size:16.5px;color:var(--text-dim);max-width:52ch;margin:0 0 20px}
.lede strong{color:var(--text);font-weight:500}
.hero-meta{display:flex;gap:34px;margin:38px 0 40px;flex-wrap:wrap}
.hero-meta div{display:flex;flex-direction:column}
.hero-meta b{font-family:var(--serif);font-size:27px;color:var(--gold-soft);font-weight:500;line-height:1.2}
.hero-meta small{font-size:11.5px;color:var(--text-faint);letter-spacing:.14em;margin-top:4px}
.btnrow{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:13px 28px;border-radius:2px;
  font-size:13px;letter-spacing:.14em;border:1px solid var(--gold);color:var(--gold-soft);
  background:linear-gradient(180deg,rgba(198,168,103,.12),rgba(198,168,103,.03));
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),background .4s var(--ease);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(198,168,103,.16);background:linear-gradient(180deg,rgba(198,168,103,.2),rgba(198,168,103,.06))}
.btn.ghost{border-color:var(--line);color:var(--text-dim);background:none}
.btn.ghost:hover{color:var(--text);border-color:rgba(198,168,103,.45);box-shadow:none}
.hero-art{position:relative;display:flex;justify-content:center;align-items:center;min-height:340px}
.hero-art img{
  max-width:100%;border-radius:3px;
  box-shadow:0 40px 90px rgba(0,0,0,.6),0 0 0 1px rgba(198,168,103,.14);
  transform:perspective(1400px) rotateY(-7deg) rotateX(2deg);
  transition:transform 1s var(--ease);
}
.hero-art:hover img{transform:perspective(1400px) rotateY(0deg) rotateX(0deg)}
.hero-art::after{
  content:"";position:absolute;inset:auto -6% -12% -6%;height:60%;z-index:-1;
  background:radial-gradient(60% 60% at 50% 50%,rgba(0,153,68,.16),transparent 70%);filter:blur(24px);
}

/* ---------- section frame ---------- */
section{padding:104px 0;position:relative}
.sec-head{max-width:60ch;margin-bottom:56px}
.kicker{font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--gold);margin-bottom:16px}
h2{font-family:var(--serif);font-weight:500;font-size:clamp(27px,3.3vw,40px);line-height:1.3;margin:0 0 18px}
.sec-head p{color:var(--text-dim);margin:0;font-size:15.5px}
.rule{height:1px;background:linear-gradient(90deg,var(--gold),transparent 70%);opacity:.4;margin:0 0 60px}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.rv.in{opacity:1;transform:none}

/* ---------- product intro cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  background:linear-gradient(170deg,var(--ink-3),var(--ink-2));
  border:1px solid rgba(255,255,255,.045);border-radius:3px;padding:34px 28px 30px;
  position:relative;overflow:hidden;transition:transform .6s var(--ease),border-color .6s var(--ease),box-shadow .6s var(--ease);
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:0;transition:opacity .6s var(--ease);
}
.card:hover{transform:translateY(-6px);border-color:rgba(198,168,103,.28);box-shadow:0 26px 60px rgba(0,0,0,.5)}
.card:hover::before{opacity:1}
.card .idx{font-family:var(--serif);font-size:12px;letter-spacing:.24em;color:var(--gold);margin-bottom:18px}
.card h3{font-family:var(--serif);font-size:22px;font-weight:500;margin:0 0 6px}
.card .sub{font-size:12px;color:var(--text-faint);letter-spacing:.1em;margin-bottom:18px}
.card p{font-size:14px;color:var(--text-dim);margin:0 0 22px}
.card ul{list-style:none;margin:0 0 24px;padding:0;font-size:13.5px;color:var(--text-dim)}
.card li{padding-left:16px;position:relative;margin-bottom:7px}
.card li::before{content:"";position:absolute;left:0;top:.72em;width:5px;height:1px;background:var(--gold);opacity:.8}
.more{font-size:12px;letter-spacing:.16em;color:var(--gold);display:inline-flex;align-items:center;gap:8px;transition:gap .35s var(--ease)}
.card:hover .more{gap:14px}

/* ---------- product detail ---------- */
.pd{padding:96px 0;border-top:1px solid rgba(255,255,255,.04)}
.pd-head{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:70px}
.pd-head .vis{position:relative}
.pd-head .vis img{
  width:100%;border-radius:3px;box-shadow:0 34px 80px rgba(0,0,0,.55),0 0 0 1px rgba(198,168,103,.12);
}
.pd-tag{
  display:inline-block;font-size:11px;letter-spacing:.26em;color:var(--gold);
  border:1px solid var(--line);border-radius:999px;padding:6px 15px;margin-bottom:22px;
}
.pd h2{margin-bottom:14px}
.pd-sub{font-size:12.5px;letter-spacing:.16em;color:var(--text-faint);text-transform:uppercase;margin-bottom:24px}
.pd-desc{color:var(--text-dim);font-size:15.5px;margin-bottom:30px}

/* highlight strips */
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:60px}
.hl{
  border:1px solid rgba(255,255,255,.045);border-radius:3px;padding:24px 20px;text-align:center;
  background:linear-gradient(180deg,rgba(255,255,255,.028),transparent);
  transition:border-color .5s var(--ease),transform .5s var(--ease);
}
.hl:hover{border-color:rgba(198,168,103,.3);transform:translateY(-3px)}
.hl img{width:46px;height:46px;object-fit:contain;margin:0 auto 14px}
.hl b{display:block;font-family:var(--serif);font-size:17px;font-weight:500;margin-bottom:5px}
.hl small{font-size:12.5px;color:var(--text-faint);line-height:1.6}

/* feature rows */
.frow{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:64px}
.frow:nth-child(even) .ftxt{order:2}
.ftxt h3{font-family:var(--serif);font-size:25px;font-weight:500;margin:0 0 16px;line-height:1.35}
.ftxt h3 span{color:var(--gold)}
.ftxt p{color:var(--text-dim);font-size:15px;margin:0 0 16px}
.fimg img{width:100%;border-radius:3px;box-shadow:0 30px 70px rgba(0,0,0,.5),0 0 0 1px rgba(255,255,255,.045)}
.fimg.wide img{box-shadow:none;background:none}

/* spec table */
.specs{margin-top:46px}
.specs h4{
  font-family:var(--serif);font-size:19px;font-weight:500;margin:0 0 22px;
  display:flex;align-items:center;gap:14px;
}
.specs h4::after{content:"";flex:1;height:1px;background:var(--line)}
table{width:100%;border-collapse:collapse;font-size:14.5px}
th,td{text-align:left;padding:14px 18px;border-bottom:1px solid rgba(255,255,255,.05);vertical-align:top}
tbody tr{transition:background .4s var(--ease)}
tbody tr:hover{background:rgba(198,168,103,.045)}
th{
  width:36%;color:var(--text-faint);font-weight:400;letter-spacing:.08em;font-size:13px;
  border-bottom:1px solid rgba(255,255,255,.05);
}
td{color:var(--text)}
td .num{color:var(--gold-soft);font-family:var(--serif)}

/* ---------- system composition ---------- */
.comp{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:8px}
.comp-i{
  border:1px solid rgba(255,255,255,.045);border-radius:3px;padding:30px 24px;
  background:linear-gradient(180deg,rgba(255,255,255,.025),transparent);
  transition:transform .55s var(--ease),border-color .55s var(--ease);
}
.comp-i:hover{transform:translateY(-5px);border-color:rgba(198,168,103,.3)}
.comp-i img{width:56px;height:56px;object-fit:contain;margin-bottom:18px}
.comp-i h5{font-family:var(--serif);font-size:18px;font-weight:500;margin:0 0 4px}
.comp-i .en{font-size:11px;letter-spacing:.18em;color:var(--gold);text-transform:uppercase;margin-bottom:14px}
.comp-i p{font-size:13.5px;color:var(--text-dim);margin:0}

/* ---------- about author ---------- */
.about{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start}
.about p{color:var(--text-dim);font-size:15.5px;margin:0 0 18px}
.role-list{list-style:none;margin:30px 0 0;padding:0;border-top:1px solid rgba(255,255,255,.06)}
.role-list li{
  padding:16px 0;border-bottom:1px solid rgba(255,255,255,.06);
  display:flex;gap:18px;align-items:baseline;font-size:14.5px;
}
.role-list li b{font-family:var(--serif);font-weight:500;color:var(--gold-soft);min-width:96px;font-size:15px}
.role-list li span{color:var(--text-dim)}

/* ---------- footer ---------- */
footer{
  border-top:1px solid rgba(255,255,255,.06);padding:56px 0 44px;
  background:linear-gradient(180deg,transparent,rgba(0,0,0,.4));
}
.foot{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start}
.foot .brand{margin-bottom:14px}
.foot p{font-size:12.5px;color:var(--text-faint);margin:0;max-width:70ch;line-height:1.8}
.foot .tm{font-size:12px;color:var(--text-faint);letter-spacing:.06em}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-grid,.pd-head,.about{grid-template-columns:1fr;gap:40px}
  .frow{grid-template-columns:1fr;gap:32px}
  .frow:nth-child(even) .ftxt{order:0}
  .cards{grid-template-columns:1fr}
  .strip,.comp{grid-template-columns:repeat(2,1fr)}
  .hero{min-height:auto;padding:110px 0 60px}
  .hero-art img{transform:none}
  .nav-links{
    position:fixed;inset:60px 0 auto;flex-direction:column;align-items:flex-start;gap:0;
    background:rgba(10,12,11,.97);backdrop-filter:blur(16px);padding:14px 28px 22px;
    border-bottom:1px solid var(--line);transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .35s var(--ease),transform .35s var(--ease);
  }
  .nav-links.open{opacity:1;transform:none;pointer-events:auto}
  .nav-links a{padding:12px 0;font-size:15px;width:100%;border-bottom:1px solid rgba(255,255,255,.05)}
  .burger{display:block;order:3}
  .lang{order:2;margin-left:auto}
  section{padding:74px 0}
  th{width:42%}
}
@media (max-width:560px){
  .wrap{padding:0 20px}
  .nav-in{padding:12px 20px}
  .strip,.comp{grid-template-columns:1fr}
  th,td{padding:12px 12px;font-size:13.5px}
  th{width:46%}
  .hero-meta{gap:24px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .rv{opacity:1;transform:none}
}

/* ============================================================
   Contact / lead capture
   ============================================================ */
.nav-cta{color:var(--gold) !important;border:1px solid var(--line);padding:7px 15px !important;border-radius:999px}
.nav-cta:hover{background:rgba(198,168,103,.1);border-color:rgba(198,168,103,.45)}

.contact{position:relative;border-top:1px solid rgba(255,255,255,.05)}
.lead-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start;margin-top:52px}

.lead-form{
  background:linear-gradient(180deg,rgba(255,255,255,.028),rgba(255,255,255,.008));
  border:1px solid rgba(198,168,103,.16);border-radius:16px;
  padding:34px 32px 30px;
  box-shadow:0 24px 70px rgba(0,0,0,.34);
}
.lf-row{margin-bottom:19px}
.lf-row.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.lf-row.two>div{min-width:0}
.lead-form label{display:block;font-size:12.5px;letter-spacing:.06em;color:var(--text-dim);margin-bottom:8px}
.lead-form label i{color:var(--gold);font-style:normal;font-size:13px}
.lead-form input[type=text],
.lead-form input[type=tel],
.lead-form input[type=email],
.lead-form select,
.lead-form textarea{
  width:100%;background:rgba(0,0,0,.32);color:var(--text);
  border:1px solid rgba(255,255,255,.1);border-radius:9px;
  padding:12px 14px;font:inherit;font-size:14.5px;
  transition:border-color .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease);
}
.lead-form textarea{resize:vertical;min-height:104px;line-height:1.65}
.lead-form select{appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:linear-gradient(45deg,transparent 50%,var(--text-dim) 50%),linear-gradient(135deg,var(--text-dim) 50%,transparent 50%);
  background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;
  background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:38px}
.lead-form select option{background:#121614;color:var(--text)}
.lead-form input::placeholder,.lead-form textarea::placeholder{color:#5e5c58}
.lead-form input:focus,.lead-form select:focus,.lead-form textarea:focus{
  outline:none;border-color:rgba(198,168,103,.62);background:rgba(0,0,0,.46);
  box-shadow:0 0 0 3px rgba(198,168,103,.1);
}
.lead-form .invalid{border-color:rgba(214,96,84,.8) !important;box-shadow:0 0 0 3px rgba(214,96,84,.12) !important}

.lead-form .consent{display:flex;gap:11px;align-items:flex-start;margin:4px 0 6px;
  font-size:13.5px;color:var(--text-dim);line-height:1.6;cursor:pointer;letter-spacing:0}
.lead-form .consent input{margin-top:3px;width:16px;height:16px;flex:0 0 auto;accent-color:var(--gold);cursor:pointer}

.lead-form .submit{
  width:100%;justify-content:center;gap:9px;margin-top:14px;padding:14px 20px;
  font-size:14.5px;letter-spacing:.04em;border-radius:10px;
}
.lead-form .submit[disabled]{opacity:.55;cursor:not-allowed;transform:none !important}
.lead-form .submit svg{transition:transform .25s var(--ease)}
.lead-form .submit:hover:not([disabled]) svg{transform:translateX(4px)}

.form-msg{font-size:13.5px;line-height:1.6;margin:10px 0 0;min-height:0}
.form-msg:empty{display:none}
.form-msg.err{color:#e08a7e}
.form-msg.ok{color:var(--brand-lift)}
.lead-form .tiny{font-size:12px;color:var(--text-faint);margin:12px 0 0;line-height:1.6}

/* honeypot: 对真实用户完全不可见，对爬虫仍可填 */
.lead-form .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;opacity:0;pointer-events:none}

/* sidebar */
.lead-side{display:flex;flex-direction:column;gap:22px}
.side-card{border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:28px 26px;
  background:rgba(255,255,255,.018)}
.side-t{font-family:var(--serif);font-size:17px;color:var(--gold-soft);margin-bottom:16px;letter-spacing:.02em}
.side-card ul{margin:0;padding:0;list-style:none}
.side-card li{position:relative;padding:9px 0 9px 20px;font-size:14px;color:var(--text-dim);
  border-bottom:1px solid rgba(255,255,255,.045)}
.side-card li:last-child{border-bottom:none}
.side-card li::before{content:"";position:absolute;left:2px;top:17px;width:6px;height:6px;
  border-radius:50%;background:rgba(198,168,103,.55)}
.side-note{font-size:13px;color:var(--text-faint);line-height:1.75;padding:0 4px}
.side-note p{margin:0}

@media (max-width:960px){
  .lead-grid{grid-template-columns:1fr;gap:34px}
  .lead-form{padding:26px 20px 24px}
}
@media (max-width:560px){
  .lf-row.two{grid-template-columns:1fr;gap:19px}
  .nav-cta{padding:6px 12px !important;font-size:13px !important}
}

/* ============================================================
   Combobox：可选可输（关注的方向）
   ============================================================ */
.combo{position:relative}
.combo input[type=text]{
  width:100%;background:rgba(0,0,0,.32);color:var(--text);
  border:1px solid rgba(255,255,255,.1);border-radius:9px;
  padding:12px 40px 12px 14px;font:inherit;font-size:14.5px;
  transition:border-color .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease);
}
.combo input[type=text]::placeholder{color:#5e5c58}
.combo input[type=text]:focus{
  outline:none;border-color:rgba(198,168,103,.62);background:rgba(0,0,0,.46);
  box-shadow:0 0 0 3px rgba(198,168,103,.1);
}
.combo-btn{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  width:28px;height:28px;display:grid;place-items:center;
  background:none;border:none;color:var(--text-faint);cursor:pointer;
  border-radius:6px;transition:color .2s var(--ease),background .2s var(--ease),transform .22s var(--ease);
}
.combo-btn:hover{color:var(--gold);background:rgba(198,168,103,.1)}
.combo.open .combo-btn{transform:translateY(-50%) rotate(180deg);color:var(--gold)}

.combo-list{
  position:absolute;left:0;right:0;top:calc(100% + 6px);z-index:40;
  background:#121614;border:1px solid rgba(198,168,103,.28);border-radius:10px;
  box-shadow:0 18px 46px rgba(0,0,0,.6);
  max-height:236px;overflow-y:auto;padding:5px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
}
.combo.open .combo-list{opacity:1;visibility:visible;transform:none}
.combo-opt{
  padding:10px 12px;border-radius:7px;font-size:14px;color:var(--text-dim);
  cursor:pointer;transition:background .14s,color .14s;
}
.combo-opt:hover,.combo-opt.active{background:rgba(198,168,103,.13);color:var(--text)}
.combo-opt[hidden]{display:none}
.combo-empty{padding:11px 12px;font-size:13px;color:var(--text-faint)}
.combo-empty[hidden]{display:none}
.combo-list::-webkit-scrollbar{width:7px}
.combo-list::-webkit-scrollbar-thumb{background:rgba(198,168,103,.28);border-radius:4px}
.combo-list::-webkit-scrollbar-track{background:transparent}