/* ============================================================
   太和白玉京 V5 — 「炫技即实力」
   暗夜玉宫 · 粒子星网 · 全站交互
   ============================================================ */

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#080C16;--surface:#0E1322;--surface-up:#141B2E;
  --text:#EDE8E0;--text-mid:#9A9490;--text-dim:#504C48;
  --jade:#52D4A4;--jade-s:rgba(82,212,164,.10);--jade-g:rgba(82,212,164,.28);
  --gold:#C4A060;--gold-s:rgba(196,160,96,.10);
  --iris:#A488E0;--iris-s:rgba(164,136,224,.10);
  --teal:#4CC0B4;--teal-s:rgba(76,192,180,.10);
  --amber:#D4A450;--amber-s:rgba(212,164,80,.10);
  --border:rgba(82,212,164,.08);
  --serif:'Noto Serif SC',serif;--sans:'DM Sans',system-ui,sans-serif;--display:'Fraunces',serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--text);overflow-x:hidden;-webkit-font-smoothing:antialiased}
::selection{background:var(--jade-s);color:var(--jade)}
a{color:inherit;text-decoration:none}

/* ===== Scroll Progress ===== */
.scroll-progress{position:fixed;top:0;left:0;height:2px;background:linear-gradient(90deg,var(--jade),var(--gold));z-index:999;width:0;transition:none}

/* ===== Constellation Canvas ===== */
#constellation{position:fixed;inset:0;z-index:0;pointer-events:none}

/* ===== Nav ===== */
nav{position:fixed;top:0;left:0;right:0;z-index:200;padding:1.1rem 3rem;display:flex;align-items:center;justify-content:space-between;transition:all .4s}
nav.scrolled{background:rgba(8,12,22,.85);backdrop-filter:blur(20px) saturate(1.4);border-bottom:1px solid var(--border)}
.nav-brand{display:flex;align-items:center;gap:.6rem}
.brand-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--jade),var(--gold));display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-weight:900;font-size:15px;color:var(--bg);box-shadow:0 3px 14px var(--jade-g);position:relative;overflow:hidden}
.brand-mark::after{content:'';position:absolute;inset:-60%;background:conic-gradient(from 0deg,transparent 30%,rgba(255,255,255,.28) 50%,transparent 70%);animation:gemSpin 4s linear infinite}
@keyframes gemSpin{to{transform:rotate(360deg)}}
.nav-brand span{font-family:var(--serif);font-weight:700;font-size:.98rem;letter-spacing:.05em}
.nav-links{display:flex;gap:2.2rem}
.nav-links a{font-size:.84rem;font-weight:500;color:var(--text-mid);letter-spacing:.04em;position:relative;transition:color .3s}
.nav-links a::after{content:'';position:absolute;bottom:-3px;left:0;width:0;height:1.5px;background:var(--jade);border-radius:1px;transition:width .3s}
.nav-links a:hover{color:var(--jade)}
.nav-links a:hover::after{width:100%}

/* ===== Container ===== */
.container{max-width:1120px;margin:0 auto;padding:0 3rem;position:relative;z-index:1}

/* ===== Sections ===== */
section{position:relative;z-index:1;padding:7rem 0}
.sec-tag{font-family:var(--display);font-size:.66rem;font-style:italic;letter-spacing:.3em;color:var(--jade);display:inline-block;margin-bottom:1.2rem}
.sec-title{font-family:var(--serif);font-weight:700;font-size:clamp(1.7rem,3.5vw,2.4rem);margin-bottom:.6rem}
.sec-desc{color:var(--text-mid);font-size:.95rem;line-height:1.8;font-weight:300;max-width:520px}
.sec-header{text-align:center;margin-bottom:4rem}
.sec-header .sec-desc{margin:0 auto}

/* ===== HERO ===== */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.hero-content{text-align:center;position:relative;z-index:2;max-width:680px;padding:0 3rem}
.hero-overline{font-family:var(--display);font-size:.7rem;font-style:italic;letter-spacing:.25em;color:var(--jade);margin-bottom:2.5rem}
.hero-title{font-family:var(--serif);font-weight:900;line-height:1.08;letter-spacing:.07em;margin-bottom:2rem}
.hero-line{display:block;font-size:clamp(4.5rem,11vw,9rem)}
.t-char{display:inline-block;opacity:0;animation:charReveal .7s cubic-bezier(.16,1,.3,1) forwards}
.t-char.accent{background:linear-gradient(135deg,var(--jade),var(--gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
@keyframes charReveal{from{opacity:0;transform:translateY(40px) rotate(-2deg) scale(.94)}to{opacity:1;transform:translateY(0) rotate(0) scale(1)}}
.hero-sub{font-size:1.05rem;color:var(--text-mid);line-height:1.9;font-weight:300;max-width:480px;margin:0 auto 2.5rem}
.hero-btns{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}

/* Buttons */
.btn-primary{display:inline-flex;align-items:center;gap:.4rem;padding:.85rem 2rem;border:none;border-radius:50px;background:linear-gradient(135deg,var(--jade),#3CC4A0);color:var(--bg);font-family:var(--sans);font-weight:700;font-size:.88rem;letter-spacing:.04em;box-shadow:0 4px 20px var(--jade-g);transition:transform .3s,box-shadow .3s;position:relative;overflow:hidden}
.btn-primary::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,.15),transparent);opacity:0;transition:opacity .3s}
.btn-primary:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 8px 32px rgba(82,212,164,.35)}
.btn-primary:hover::before{opacity:1}
.btn-outline{display:inline-flex;align-items:center;gap:.4rem;padding:.85rem 2rem;border:1.5px solid rgba(82,212,164,.2);border-radius:50px;background:transparent;color:var(--text-mid);font-family:var(--sans);font-weight:500;font-size:.88rem;letter-spacing:.04em;transition:all .3s}
.btn-outline:hover{color:var(--jade);border-color:var(--jade);box-shadow:0 0 24px var(--jade-s);transform:translateY(-1px)}
.btn-lg{padding:1rem 2.5rem;font-size:.95rem}

/* ===== ABOUT ===== */
.about-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:4rem;align-items:start}
.about-lead{font-family:var(--serif);font-weight:700;font-size:1.6rem;line-height:1.5;margin-bottom:1.5rem}
.about-right p{color:var(--text-mid);font-size:.95rem;line-height:1.9;font-weight:300;margin-bottom:1rem}
.about-right strong{color:var(--jade);font-weight:600}

/* ===== PRODUCTS ===== */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.prod-card{position:relative;border-radius:18px;background:var(--surface);border:1px solid var(--border);padding:2rem 1.8rem;overflow:hidden;transition:transform .5s cubic-bezier(.16,1,.3,1),box-shadow .5s,border-color .4s}
.prod-card:hover{transform:translateY(-6px);border-color:rgba(82,212,164,.2);box-shadow:0 16px 48px rgba(0,0,0,.3)}
/* Card shine follows cursor */
.card-shine{position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .4s;border-radius:18px}
.prod-card:hover .card-shine{opacity:1}
.prod-card[data-tone="iris"]:hover .card-shine{background:radial-gradient(350px circle at var(--mx) var(--my),rgba(164,136,224,.08),transparent 60%)}
.prod-card[data-tone="teal"]:hover .card-shine{background:radial-gradient(350px circle at var(--mx) var(--my),rgba(76,192,180,.08),transparent 60%)}
.prod-card[data-tone="amber"] .card-shine{background:radial-gradient(350px circle at var(--mx) var(--my),rgba(212,164,80,.08),transparent 60%)}
.prod-card[data-tone="jade"]:hover .card-shine{background:radial-gradient(350px circle at var(--mx) var(--my),rgba(82,212,164,.08),transparent 60%)}

.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}
.card-icon-wrap{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-weight:900;font-size:1.2rem;color:#fff;box-shadow:0 3px 12px rgba(0,0,0,.15);transition:transform .4s}
.prod-card:hover .card-icon-wrap{transform:scale(1.08) rotate(-2deg)}
.prod-card[data-tone="iris"] .card-icon-wrap{background:linear-gradient(135deg,#8B6CC4,#B8A0E0)}
.prod-card[data-tone="teal"] .card-icon-wrap{background:linear-gradient(135deg,#34A8B8,#60D0D0)}
.prod-card[data-tone="amber"] .card-icon-wrap{background:linear-gradient(135deg,#C08830,#E0B850)}
.prod-card[data-tone="jade"] .card-icon-wrap{background:linear-gradient(135deg,#3CC4A0,#52D4A4)}
.card-badge{font-size:.62rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:.2rem .55rem;border-radius:3px;border:1px solid}
.prod-card[data-tone="iris"] .card-badge{color:var(--iris);border-color:rgba(164,136,224,.2);background:var(--iris-s)}
.prod-card[data-tone="teal"] .card-badge{color:var(--teal);border-color:rgba(76,192,180,.2);background:var(--teal-s)}
.prod-card[data-tone="amber"] .card-badge{color:var(--amber);border-color:rgba(212,164,80,.2);background:var(--amber-s)}
.prod-card[data-tone="jade"] .card-badge{color:var(--jade);border-color:rgba(82,212,164,.2);background:var(--jade-s)}

.card-name{font-family:var(--serif);font-weight:700;font-size:1.35rem;margin-bottom:.2rem}
.card-headline{font-size:.88rem;font-weight:600;margin-bottom:.8rem}
.prod-card[data-tone="iris"] .card-headline{color:var(--iris)}
.prod-card[data-tone="teal"] .card-headline{color:var(--teal)}
.prod-card[data-tone="amber"] .card-headline{color:var(--amber)}
.prod-card[data-tone="jade"] .card-headline{color:var(--jade)}
.card-body{color:var(--text-mid);font-size:.88rem;line-height:1.75;font-weight:300;margin-bottom:1.2rem}
.card-features{list-style:none;display:flex;flex-direction:column;gap:.45rem}
.card-features li{font-size:.8rem;color:var(--text-mid);padding-left:.9rem;position:relative;font-weight:300}
.card-features li::before{content:'';position:absolute;left:0;top:.55em;width:3px;height:3px;border-radius:50%}
.prod-card[data-tone="iris"] .card-features li::before{background:var(--iris)}
.prod-card[data-tone="teal"] .card-features li::before{background:var(--teal)}
.prod-card[data-tone="amber"] .card-features li::before{background:var(--amber)}
.prod-card[data-tone="jade"] .card-features li::before{background:var(--jade)}

/* Linked product card */
.prod-card-link{display:flex;flex-direction:column;text-decoration:none;color:inherit}
.prod-card-link:hover .card-go{opacity:1;transform:translateX(4px)}
.card-go{margin-top:auto;padding-top:.8rem;font-size:.78rem;font-weight:600;color:var(--jade);opacity:0;transform:translateX(0);transition:opacity .4s,transform .4s}

/* ===== SERVICES ===== */
#services{background:var(--surface)}
.svc-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin-bottom:3rem}
.svc-card{padding:2rem;border-radius:16px;border:1px solid var(--border);background:var(--surface-up);transition:border-color .4s,transform .4s,box-shadow .4s}
.svc-card:hover{border-color:rgba(82,212,164,.18);transform:translateY(-3px);box-shadow:0 8px 28px rgba(0,0,0,.2)}
.svc-icon{font-size:1.6rem;margin-bottom:1rem}
.svc-card h3{font-family:var(--serif);font-weight:700;font-size:1.15rem;margin-bottom:.5rem}
.svc-card p{color:var(--text-mid);font-size:.86rem;line-height:1.75;font-weight:300}
.svc-cta{text-align:center}

/* ===== PHILOSOPHY ===== */
.phil-inner{display:grid;grid-template-columns:1fr 1fr;gap:5rem;align-items:center;max-width:960px;margin:0 auto}
.phil-quote{font-family:var(--serif);font-weight:900;font-size:clamp(2.2rem,4.5vw,3.4rem);line-height:1.35;border:none;padding:0;margin:0}
.phil-bar{margin-top:1.5rem;height:3px;width:48px;border-radius:2px;background:linear-gradient(90deg,var(--jade),var(--gold))}
.phil-right p{color:var(--text-mid);font-size:.98rem;line-height:2;font-weight:300;margin-bottom:1.2rem}
.phil-right em{color:var(--jade);font-style:normal;font-weight:500}
.phil-stats{display:flex;justify-content:center;gap:4rem;max-width:640px;margin:4rem auto 0;flex-wrap:wrap}
.p-stat{text-align:center}
.p-stat strong{display:block;font-family:var(--serif);font-size:2.6rem;font-weight:900;background:linear-gradient(135deg,var(--jade),var(--gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}
.p-stat span{font-size:.74rem;color:var(--text-dim);letter-spacing:.06em}

/* ===== CONTACT ===== */
.contact-box{text-align:center;max-width:560px;margin:0 auto;padding:3.5rem 3rem;border-radius:20px;background:var(--surface);border:1px solid var(--border);position:relative;overflow:hidden}
.contact-box::before{content:'';position:absolute;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(82,212,164,.04),transparent 70%);top:-80px;right:-60px;pointer-events:none}
.contact-title{font-family:var(--serif);font-weight:700;font-size:1.5rem;margin:.5rem 0 .8rem;position:relative}
.contact-desc{color:var(--text-mid);font-size:.92rem;line-height:1.8;font-weight:300;margin-bottom:2rem;position:relative}
.contact-legal{margin-top:2rem;font-size:.68rem;color:var(--text-dim);display:flex;flex-direction:column;gap:.3rem;position:relative}
.contact-legal a{color:var(--text-dim);transition:color .3s}
.contact-legal a:hover{color:var(--jade)}

/* ===== Scroll Reveal ===== */
.anim-el{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.anim-el.visible{opacity:1;transform:none}

/* ===== Responsive ===== */
@media(max-width:900px){
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:2rem}
  .svc-grid{grid-template-columns:1fr}
  .phil-inner{grid-template-columns:1fr;gap:2.5rem}
  nav{padding:1rem 1.5rem}
  .nav-links{gap:1.5rem}
  .container{padding:0 1.5rem}
  section{padding:5rem 0}
}
@media(max-width:600px){
  .prod-grid{grid-template-columns:1fr}
  .nav-links{gap:1rem}
  .nav-links a{font-size:.78rem}
  .hero-btns{flex-direction:column;align-items:center}
  .phil-stats{gap:2.5rem}
  .contact-box{padding:2.5rem 1.5rem}
}